Power generation control method and device for extended-range hybrid power loader

Abstract

The invention provides a power generation control method and device for an extended-range hybrid power loader. According to the scheme, the current working mode of the range extending type hybrid power loader is determined according to the real-time operation parameters and the driving operation information; the current working mode of the range extender is determined according to the current working mode of the range-extended hybrid power loader and the charge state of the power battery, and the current required power generation power of the range extender is determined based on the current working mode of the range extender, the required power of the range-extended hybrid power loader and the charge state of the power battery; according to the current required power generation power of the range extender, a preset range extender output electric power curve and a preset engine fuel efficiency characteristic curve, the target rotating speed of a generator and the target torque of the engine are determined, and according to the current working mode of the range-extended hybrid power loader, the target rotating speed of the generator and the target torque of the engine; and controlling the operation states of the engine and the generator. According to the scheme, the problem of low energy efficiency of an extended-range hybrid power loader is solved.

Description

Technical Field

[0001] The present application relates to the field of hybrid loaders, and more specifically, to a power generation control method for an extended-range hybrid loader, a power generation control device for an extended-range hybrid loader, and a computer-readable storage medium. Background Art

[0002] Range-extended hybrid systems have been widely adopted in the construction machinery sector in recent years, with loaders being a prime example. Due to their cyclical nature and demanding power performance, these vehicles have become a key target for range-extended technology optimization. By combining an internal combustion engine with a range extender and a battery, these hybrid loaders aim to balance power response speed and energy efficiency. Energy management strategies are particularly crucial in operating environments with rapid load changes and complex transient conditions.

[0003] Existing loader power generation control strategies, such as constant temperature fixed-point control, multi-point fixed-point control, and power following control, fail to fully consider the loader's unique operating mode. Faced with the dual challenges of continuous cycle operation and high transient response requirements of the loader, there are obvious deficiencies in energy management. Summary of the Invention

[0004] The main purpose of this application is to provide a power generation control method for an extended-range hybrid loader, a power generation control device for an extended-range hybrid loader and a computer-readable storage medium, so as to at least solve the problem of low energy efficiency of extended-range hybrid loaders in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a power generation control method for an extended-range hybrid loader is provided, comprising: monitoring the real-time operating parameters and driving operation information of the extended-range hybrid loader, and determining the current working mode of the extended-range hybrid loader according to the real-time operating parameters and the driving operation information, wherein the current working mode of the extended-range hybrid loader is a whole vehicle operation mode, a whole vehicle operation waiting mode or a whole vehicle stop waiting mode, and the driving operation information includes the opening of the accelerator pedal and the displacement of the hydraulic joystick; determining the range extender according to the current working mode of the extended-range hybrid loader and the charge state of the power battery The system comprises the following steps: determining the current required power generation power of the range extender based on the current operating mode of the range extender, the required power of the range-extended hybrid loader and the state of charge of the power battery, wherein the required power of the range-extended hybrid loader is obtained based on the current operating mode of the range extender; determining the generator target speed and the engine target torque according to the current required power generation power of the range extender, a preset range extender output electric power curve and a preset engine fuel efficiency characteristic curve, and controlling the operating states of the engine and the generator according to the current operating mode of the range-extended hybrid loader, the generator target speed and the engine target torque.

[0006] Optionally, monitoring the real-time operating parameters and driving operation information of the extended-range hybrid loader, and determining the current operating mode of the extended-range hybrid loader based on the real-time operating parameters and the driving operation information, includes: monitoring the real-time operating parameters and the driving operation information of the extended-range hybrid loader to determine a first duration of no action signal for the throttle opening of the extended-range hybrid loader, and / or a second duration of no action signal for the hydraulic working device operating handle; when the first duration and / or the second duration is less than or equal to a first time threshold, determining that the current operating mode of the extended-range hybrid loader is the whole vehicle operation mode; when the first duration and / or the second duration is greater than the first time threshold and less than the second time threshold, determining that the current operating mode of the extended-range hybrid loader is the whole vehicle operation waiting mode; when the first duration and / or the second duration is greater than or equal to the second time threshold, determining that the current operating mode of the extended-range hybrid loader is the whole vehicle stop waiting mode, wherein the first time threshold is less than the second time threshold.

[0007] Optionally, according to the current working mode of the extended-range hybrid loader and the state of charge of the power battery, the current working mode of the range extender is determined, including: when the current working mode of the extended-range hybrid loader is the whole vehicle operation mode, if the state of charge of the power battery is less than or equal to a first state of charge threshold, the current working mode of the range extender is determined to be the maximum fixed-point power generation mode; if the state of charge of the power battery is greater than or equal to a second state of charge threshold, the current working mode of the range extender is determined to be the standby mode; if the state of charge of the power battery is greater than the first state of charge threshold and less than the second state of charge threshold, the range extender is determined to be in standby mode. The current operating mode is the power follow mode; when the current operating mode of the extended-range hybrid loader is the vehicle operation waiting mode, if the state of charge of the power battery is less than or equal to the first state of charge threshold, it is determined that the current operating mode of the range extender is the optimal fixed-point power generation mode; if the state of charge of the power battery is greater than the first state of charge threshold, it is determined that the current operating mode of the range extender is the standby mode; when the current operating mode of the extended-range hybrid loader is the vehicle shutdown waiting mode, it is determined that the current operating mode of the range extender is the shutdown mode, wherein the first state of charge threshold is less than the second state of charge threshold.

[0008] Optionally, based on the current operating mode of the range extender, the required power of the range extender hybrid loader and the charge state of the power battery, the current required power generation power of the range extender is determined, wherein the required power of the range extender hybrid loader is obtained based on the current operating mode of the range extender, including: when the current operating mode of the range extender hybrid loader is the whole vehicle operation mode, if the current operating mode of the range extender is the maximum fixed-point power generation mode, determining that the current required power generation power of the range extender is the rated power of the range extender; if the current operating mode of the range extender is the standby mode, determining that the current required power generation power of the range extender is zero; if the current operating mode of the range extender is the power following mode, the current required power generation power of the range extender is determined according to the interpolation of the power generation power MAP of the range extender power following mode, wherein the The horizontal axis of the range extender power following mode power generation MAP is the required power of the range extender hybrid loader, and the vertical axis of the range extender power following mode power generation MAP is the current required power generation power of the range extender; when the current working mode of the range extender hybrid loader is the whole vehicle operation waiting mode, if the current working mode of the range extender is the optimal fixed-point power generation mode, the current required power generation power of the range extender is determined to be the range extender output power corresponding to the engine operating at the high efficiency point, and the high efficiency point is obtained according to the preset fuel consumption rate MAP and the preset increase efficiency MAP. If the current working mode of the range extender is the standby mode, the current required power generation power of the range extender is determined to be zero; when the current working mode of the range extender hybrid loader is the whole vehicle stop waiting mode, the current required power generation power of the range extender is determined to be zero.

[0009] Optionally, determining a generator target speed and an engine target torque according to the currently required power generation power of the range extender, a preset range extender output power curve, and a preset engine fuel efficiency characteristic curve includes: determining an engine operating condition point corresponding to the currently required power generation power of the range extender through a lookup or interpolation algorithm based on the currently required power generation power of the range extender, the preset range extender output power curve, and the preset engine fuel efficiency characteristic curve, wherein the engine operating condition point is a speed and torque at which the engine meets a predetermined fuel efficiency standard while providing the currently required power generation power of the range extender; determining the speed as the generator target speed, and determining the torque as the engine target torque, wherein the preset range extender output power curve and the preset engine fuel efficiency characteristic curve are obtained through bench tests during the engine development stage and stored in the vehicle control system for determining the engine operating parameters according to the currently required power generation power of the range extender.

[0010] Optionally, if the current operating mode of the range extender is the maximum fixed-point power generation mode, after determining that the current required power generation power of the range extender is the rated power of the range extender, the method further includes: detecting whether the current operating mode of the range-extended hybrid loader is the whole-vehicle operation mode; if the current operating mode of the range-extended hybrid loader is not the whole-vehicle operation mode, the current operating mode of the range-extended hybrid loader enters the whole-vehicle operation waiting mode; if the current operating mode of the range-extended hybrid loader is the whole-vehicle operation mode, detecting whether the state of charge of the power battery is greater than or equal to a third state of charge threshold value; if the state of charge of the power battery is greater than or equal to the third state of charge threshold value, the current operating mode of the range extender enters the power following mode; if the state of charge of the power battery is less than the third state of charge threshold value, the current operating mode of the range extender maintains the maximum fixed-point power generation mode.

[0011] Optionally, when the current operating mode of the extended-range hybrid loader is the whole-vehicle stop waiting mode, after determining that the current required power generation power of the range extender is zero, the method further includes: detecting whether the current operating mode of the extended-range hybrid loader is the whole-vehicle stop waiting mode; if the current operating mode of the extended-range hybrid loader is the whole-vehicle stop waiting mode, the current operating mode of the range extender is the stop mode; if the current operating mode of the extended-range hybrid loader is not the whole-vehicle stop waiting mode, the range extender generator reverses to start the engine, and the current operating mode of the extended-range hybrid loader enters the whole-vehicle operation mode.

[0012] Optionally, the operating states of the engine and generator are controlled according to the current operating mode of the extended-range hybrid loader, the generator target speed and the engine target torque, including: controlling the engine to stop or start based on the current operating mode of the extended-range hybrid loader, the engine target torque and the generator target speed, or controlling the engine operation according to the engine target torque and controlling the generator operation according to the generator target speed based on the current operating mode of the extended-range hybrid loader.

[0013] According to another aspect of the present application, a power generation control device for an extended-range hybrid loader is provided, comprising: a monitoring unit for monitoring real-time operating parameters and driving operation information of the extended-range hybrid loader, and determining a current operating mode of the extended-range hybrid loader based on the real-time operating parameters and the driving operation information, wherein the current operating mode of the extended-range hybrid loader is a whole-vehicle operation mode, a whole-vehicle operation waiting mode or a whole-vehicle stop waiting mode, and the driving operation information includes the opening of the accelerator pedal and the displacement of the hydraulic joystick; a determining unit for determining the current operating mode of the range extender based on the current operating mode of the extended-range hybrid loader and the charge state of the power battery The control unit is configured to determine a current required power generation power of the range extender based on the current working mode of the range extender, the required power of the range-extended hybrid loader and the state of charge of the power battery, wherein the required power of the range-extended hybrid loader is obtained based on the current working mode of the range extender; and a control unit is configured to determine a generator target speed and an engine target torque based on the current required power generation power of the range extender, a preset range extender output electric power curve and a preset engine fuel efficiency characteristic curve, and control the operating states of the engine and the generator based on the current working mode of the range-extended hybrid loader, the generator target speed and the engine target torque.

[0014] According to another aspect of the present application, a computer-readable storage medium is provided, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the power generation control methods for the extended-range hybrid loader.

[0015] The technical solution of the present application is applied to monitor the real-time operating parameters and driving operation information of a range-extended hybrid loader, and determine the current operating mode of the range-extended hybrid loader based on the real-time operating parameters and driving operation information, wherein the current operating mode of the range-extended hybrid loader is a whole-vehicle operation mode, a whole-vehicle operation waiting mode, or a whole-vehicle stop waiting mode, and the driving operation information includes the opening degree of the accelerator pedal and the displacement of the hydraulic joystick; determine the current operating mode of the range extender based on the current operating mode of the range-extended hybrid loader and the charge state of the power battery, and determine the current required power generation power of the range extender based on the current operating mode of the range extender, the required power of the range-extended hybrid loader, and the charge state of the power battery, wherein the required power of the range-extended hybrid loader is obtained based on the current operating mode of the range extender; determine the generator target speed and the engine target torque based on the current required power generation power of the range extender, a preset range extender output power curve, and a preset engine fuel efficiency characteristic curve, and control the operating state of the engine and the generator based on the current operating mode of the range-extended hybrid loader, the generator target speed, and the engine target torque. In this solution, by real-time monitoring of the operating parameters and driving operation information of the extended-range hybrid loader, the current operating mode of the extended-range hybrid loader is intelligently judged. Based on the current operating mode of the extended-range hybrid loader and the charge state of the power battery, the current operating mode of the range extender is dynamically determined, and then the current required power generation power of the range extender is calculated. The preset range extender output power curve and the preset engine fuel efficiency characteristic curve are used to determine the generator target speed and the engine target torque, thereby achieving fine control of the operating status of the engine and generator, significantly improving energy utilization efficiency, and ensuring that the engine operates in the optimal fuel economy range, thereby solving the problem of low energy efficiency of extended-range hybrid loaders in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0017] Figure 1 A hardware structure block diagram of a mobile terminal for executing a power generation control method for a range-extended hybrid loader provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic flow chart of a method for controlling power generation of a range-extended hybrid loader according to an embodiment of the present application is shown;

[0019] Figure 3A schematic diagram of a flow chart showing a determination process of a current working mode of a range-extended hybrid loader according to a power generation control method of a range-extended hybrid loader provided in an embodiment of the present application is shown;

[0020] Figure 4 A flow chart of a power generation control strategy in a vehicle operation mode of a power generation control method of a range-extended hybrid loader provided in an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram of power generation power MAP in a range extender power following mode of a power generation control method for a range-extended hybrid loader provided in accordance with an embodiment of the present application is shown;

[0022] Figure 6 A flow chart of a power generation control strategy in a vehicle operation waiting mode of a power generation control method of a range-extended hybrid loader provided in accordance with an embodiment of the present application is shown;

[0023] Figure 7 A flowchart of the start-up control from a vehicle stop waiting mode to a vehicle operation mode of a power generation control method of a range-extended hybrid loader provided in accordance with an embodiment of the present application is shown;

[0024] Figure 8 The following is a structural block diagram of a power generation control device for a range-extended hybrid loader according to an embodiment of the present application;

[0025] Figure 9 A schematic diagram of a power system of an extended-range hybrid loader provided according to an embodiment of the present application is shown.

[0026] The above drawings include the following reference numerals:

[0027] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] As introduced in the background technology, the power generation control strategy of the extended-range hybrid loader in the existing technology has obvious deficiencies in energy management when facing the dual challenges of continuous cycle operation and high transient response requirements. In order to solve the problem of low energy efficiency of the extended-range hybrid loader in the existing technology, the embodiments of the present application provide a power generation control method for an extended-range hybrid loader, a power generation control device for an extended-range hybrid loader and a computer-readable storage medium.

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a power generation control method of a range-extended hybrid loader according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown) a processor 102 (the processor 102 may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown.

[0034] The memory 104 can be used to store computer programs, such as software programs and modules of application software, such as the computer program corresponding to the device information display method in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implementing the above-mentioned method. The memory 104 may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned networks include but are not limited to the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0035] In this embodiment, a power generation control method for an extended-range hybrid loader running on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0036] Figure 2 FIG is a flow chart of a method for controlling power generation of a range-extended hybrid loader according to an embodiment of the present application. Figure 2 As shown, the method includes the following steps:

[0037] Step S201: monitoring real-time operating parameters and driving operation information of the range-extended hybrid loader, and determining a current operating mode of the range-extended hybrid loader based on the real-time operating parameters and the driving operation information, wherein the current operating mode of the range-extended hybrid loader is a vehicle operation mode, a vehicle operation waiting mode, or a vehicle stop waiting mode, and the driving operation information includes an accelerator pedal opening and a hydraulic joystick displacement;

[0038] Specifically, the real-time operating parameters of the extended-range hybrid loader (hereinafter referred to as the loader) include the loader's speed, acceleration, state of charge (SOC) of the power battery, accelerator pedal position, hydraulic system pressure, engine temperature, etc. These parameters are continuously collected through various sensors on the loader. Monitoring these parameters can provide real-time understanding of the loader's health status and working conditions, providing basic data for subsequent decision-making. Driving operation information is mainly reflected in the opening of the accelerator pedal and the displacement of the hydraulic joystick. The opening of the accelerator pedal reflects the extent to which the driver wants to increase the speed of the loader or apply greater operating force. The accelerator pedal is equipped with a position sensor, usually a potentiometer or a Hall effect sensor, which can measure the angular change of the accelerator pedal relative to its static position. When the driver presses the accelerator pedal, a sensor generates an electrical signal corresponding to the actual degree of accelerator pedal opening and transmits this signal to the vehicle's electronic control unit (ECU). Based on the received signal, the ECU calculates the degree of accelerator pedal opening. The displacement of the hydraulic joystick reflects the specific operational requirements of the hydraulic system (such as the bucket and tilt mechanism). This displacement is also detected by a sensor mounted on the lever. The joystick sensor can be a linear position sensor or a rotary position sensor, depending on the type of movement of the lever. When the driver moves the lever, the sensor records the displacement (i.e., the displacement of the hydraulic joystick) and converts this information into an electronic signal that is transmitted to the vehicle's control system. Monitoring driving operation information directly understands the driver's expectations for the loader's current operating status and is a key basis for distinguishing different operating modes.

[0039] Based on the analysis of the real-time operating parameters and driving operation information of the extended-range hybrid loader, it is identified that the extended-range hybrid loader is in one of three possible working modes: vehicle operation mode, vehicle operation waiting mode, and vehicle stop waiting mode.

[0040] By monitoring the RRH loader's real-time operating parameters and driving information, and intelligently determining its current operating mode based on this information, this system provides a critical decision-making basis for subsequent energy allocation and engine operating condition optimization. Identifying the RRH loader's current operating mode is key to achieving efficient and economical operation. It promotes the intelligent matching of the power system with operational requirements, laying a solid foundation for achieving energy conservation, emission reduction, and improved operational performance.

[0041] Step S202, determining the current operating mode of the range extender based on the current operating mode of the range extender hybrid loader and the state of charge of the power battery, and determining the current required generated power of the range extender based on the current operating mode of the range extender, the required power of the range extender hybrid loader, and the state of charge of the power battery, wherein the required power of the range extender hybrid loader is obtained based on the current operating mode of the range extender hybrid loader;

[0042] Specifically, the range extender's current operating mode is determined based on the range extender's current operating mode (full vehicle operation mode, full vehicle operation waiting mode, or full vehicle shutdown waiting mode) and the power battery's state of charge. The immediate needs of the operation and the battery's state are taken into account to determine whether the range extender should generate power at maximum power, generate power at the optimal fuel efficiency point, follow demand power, or remain in standby mode. First, based on driving operation information such as the accelerator pedal opening and the displacement of the hydraulic joystick, combined with vehicle operating parameters (such as speed and load), the range extender intelligently identifies whether it is in operation mode, operation waiting mode, or shutdown waiting mode. At the same time, by monitoring the power battery's state of charge, it can determine whether the battery power level meets the operation requirements, providing a basis for the subsequent selection of the range extender's operating mode. Based on the identification of the range extender's current operating mode and the power battery's state of charge, the range extender's current operating mode is dynamically adjusted.

[0043] On the basis of determining the current working mode of the range extender, the power generation power that the range extender should generate (i.e. the current required power generation power of the range extender) is accurately calculated by comprehensively considering the required power of the range extender hybrid loader and the charge state of the power battery under the current working mode of the range extender.

[0044] Step S202 integrates the current operating mode of the range-extended hybrid loader and the state of charge of the power battery to intelligently determine the range extender's operating mode. This ensures the engine operates within the optimal fuel economy range while maintaining the battery SOC within the efficient operating range, significantly enhancing the flexibility and efficiency of energy management. Furthermore, based on the range extender's current operating mode, the required power of the range extender, and the power battery's state of charge, the range extender's current required power generation is accurately calculated. This not only optimizes energy distribution, reduces battery charging and discharging losses, and extends battery life, but also reduces the frequency of unnecessary engine starts and stops, significantly improving overall system fuel economy and engine reliability. In short, the range extender's operating mode and power generation are dynamically adjusted based on the range extender's operating state and battery energy state, thereby optimizing energy utilization and reducing system losses while meeting operational power requirements.

[0045] Step S203: Determine the generator target speed and the engine target torque based on the current required power generation power of the range extender, the preset range extender output power curve, and the preset engine fuel efficiency characteristic curve, and control the operating states of the engine and generator based on the current operating mode of the range-extended hybrid loader, the generator target speed, and the engine target torque.

[0046] Specifically, the range extender's current required power generation is the basis for determining the operating states of the engine and generator. A preset range extender output power curve is used as a reference, depicting the available power at different engine speeds. Simultaneously, a preset engine fuel efficiency characteristic curve provides the engine's fuel economy performance at various operating points. These two curves form the data foundation for finding the most efficient operating point. By comparing and analyzing these two curves, a combination is sought that both meets the range extender's current required power generation and maintains the engine operating at optimal fuel efficiency. Specifically, this process involves finding the engine speed that matches the required power generation and further determining the torque value that maximizes engine fuel efficiency at that speed. Once an efficient generator target speed and engine target torque combination is found, the engine and generator operating states are adjusted accordingly.

[0047] Step S203 optimizes the range-extended hybrid loader's energy management through intelligent control. This not only allows for flexible adjustments to the engine and generator operating states based on operational requirements, but also ensures efficient utilization of the entire power system and reduces unnecessary energy waste. In particular, by precisely controlling engine operation within the optimal fuel efficiency range and rationally planning the battery SOC range, the vehicle's fuel economy is effectively improved, battery life is extended, and unnecessary engine starts and stops are reduced, enhancing engine reliability and ultimately improving the energy efficiency of the range-extended hybrid loader.

[0048] Through this embodiment, the real-time operating parameters and driving operation information of the extended-range hybrid loader are continuously monitored, and the specific working mode of the extended-range hybrid loader in which the operation is in progress, the operation is waiting or the shutdown is waiting is intelligently identified. This identification process ensures that the driver's operating intention and the vehicle's operating needs can be responded to in a timely manner, laying the foundation for the subsequent energy management mode selection; based on the identified current working mode of the loader and the state of charge (SOC) of the power battery, the current working mode of the range extender is dynamically adjusted, and the current required power generation power of the range extender that best suits the current scenario is calculated accordingly, which not only effectively balances the battery charge and discharge cycle, reduces battery loss, but also prolongs the service life. It not only extends the battery life, but also ensures that the engine operates in the optimal fuel efficiency range, greatly improves energy utilization efficiency and reduces fuel consumption; according to the current required power generation power of the range extender, combined with the preset range extender output power curve and the preset engine fuel efficiency characteristic curve, the generator target speed and engine target torque are intelligently determined. Based on these parameters, the operating status of the engine and generator can be accurately controlled to ensure that while meeting the power requirements of the loader, it operates at the most economical and efficient operating point, thereby reducing the number of engine starts and stops and reducing losses in the energy conversion process, thereby solving the problem of low energy efficiency of extended-range hybrid loaders in the existing technology.

[0049] In a specific implementation process, real-time operating parameters and driving operation information of the extended-range hybrid loader are monitored, and the current operating mode of the extended-range hybrid loader is determined based on the real-time operating parameters and the driving operation information, including: monitoring the real-time operating parameters and the driving operation information of the extended-range hybrid loader to determine a first duration of no action signal for the throttle opening of the extended-range hybrid loader and / or a second duration of no action signal for the operating handle of the hydraulic working device; when the first duration and / or the second duration is less than or equal to a first time threshold, determining that the current operating mode of the extended-range hybrid loader is the vehicle operation proceeding mode; when the first duration and / or the second duration is greater than the first time threshold and less than the second time threshold, determining that the current operating mode of the extended-range hybrid loader is the vehicle operation waiting mode; when the first duration and / or the second duration is greater than or equal to the second time threshold, determining that the current operating mode of the extended-range hybrid loader is the vehicle stop waiting mode, wherein the first time threshold is less than the second time threshold.

[0050] Specifically, the real-time operating parameters of the extended-range hybrid loader include key indicators such as the current operating status, speed, and load. Driving operation information mainly includes the opening of the accelerator pedal and the displacement of the hydraulic joystick (the status of the hydraulic working device operating handle). By continuously monitoring this information, it is possible to capture the driver's operating details and the dynamic changes of the vehicle, providing real-time data support for subsequent work mode determination.

[0051] Real-time operating parameters of a range-extended hybrid loader provide crucial information about the vehicle's current state. For example, even when the driver isn't operating the accelerator or hydraulics, a low battery or high engine temperature can trigger different control strategies to ensure safe and stable vehicle operation. Monitoring the range-extended hybrid loader's real-time operating parameters facilitates more granular energy management, ensuring the battery and engine operate at optimal levels. For example, based on the battery's state of charge (SOC) and the loader's power requirements, the range extender's power generation strategy can be intelligently adjusted to avoid unnecessary energy waste or battery overcharging and discharging, thereby extending battery life and improving energy efficiency. By monitoring the loader's real-time operating parameters, predictive information about the vehicle's operating trends can be obtained. For example, current vehicle speed and acceleration trends can be used to predict future power requirements. This allows control strategies to adapt in advance, reducing response lag and improving control smoothness and efficiency. The RRH loader's real-time operating parameters provide additional context and environmental information, enabling the control strategy to more comprehensively and intelligently respond to the RRH loader's actual needs and operating status. This not only responds to the driver's direct actions but also enables intelligent decision-making based on the RRH loader's overall operating conditions, which is crucial for improving the RRH loader's performance, energy efficiency, and safety.

[0052] The first duration T1 of no action signal for the throttle opening of the extended-range hybrid loader and / or the second duration T2 of no action signal for the operating handle of the hydraulic working device are determined through the real-time operating parameters and driving operation information of the extended-range hybrid loader. The first duration of no action signal for the throttle opening refers to the duration of time during which the throttle pedal position remains unchanged from the last displacement of the throttle pedal (i.e., the driver adjusted the throttle opening) to the current moment. The length of this time period can reflect the change in the driver's demand for vehicle power output. The first time threshold is set to Tmin and the second time threshold is set to Tmax. Among them, the setting of the first time threshold to Tmin and the second time threshold to Tmax is mainly based on the operating characteristics and energy management requirements of the extended-range hybrid loader. Specific considerations include operating cycle characteristics, operating response time, energy saving and emission control, etc. For example, loader operations typically involve continuous cycles of movement, such as loading, carrying, unloading, and returning. Tmin is typically set within a short timeframe to distinguish between normal operational continuity and brief interruptions. The operational response time, defined as the time from the driver's command to the vehicle's actual response and commencement of operation, should be sufficiently short to ensure the vehicle can quickly respond to the driver's operational needs, improving operational efficiency and safety. The second time threshold, Tmax, is primarily designed to maximize energy conservation and emissions reduction during extended periods of inactivity (such as when the driver is resting or waiting for loading operations to begin). The second time threshold, Tmax, is greater than the first time threshold, Tmin, to ensure that the engine and range extender are not frequently activated during brief stops, but it should be short enough to prevent the vehicle from remaining in an inefficient standby mode while the driver prepares to resume operations. The setting of the first and second time thresholds, Tmin and Tmax, should also consider dynamic management of the power battery's state of charge (SOC). In standby mode, the range extender can operate moderately to maintain a moderate SOC, avoiding overdischarge or overcharge during standby mode and extending battery life. In summary, the setting of the first time threshold, Tmin, and the second time threshold, Tmax, is a decision-making process that comprehensively considers multiple factors, including the loader's operating characteristics, operational response requirements, energy management strategy, and battery life. In practice, these thresholds require multiple tests and adjustments to adapt to different operating environments and task requirements, ensuring that the loader maintains efficient and stable operating capabilities while saving energy and reducing emissions. In this embodiment, the first time threshold, Tmin, can be set to 1 minute, and the second time threshold, Tmax, can be set to 10 minutes.

[0053] Specifically, the flow chart for determining the current working mode of the extended-range hybrid loader is as follows: Figure 3As shown, if the first duration T1 and / or the second duration T2 is less than or equal to the first time threshold Tmin, it means that the driver frequently adjusts the accelerator pedal and / or the hydraulic working device operating handle, indicating that the current operating mode of the extended-range hybrid loader is the vehicle operation mode. If the first duration T1 and / or the second duration T2 is greater than the first time threshold Tmin and less than the second time threshold Tmax, it means that the loader has been paused for a considerable period of time but has not yet reached the point of complete shutdown and waiting. It is considered that the loader is in a transitional stage: it has completed the current task but is waiting for the next task to begin, that is, the current operating mode of the extended-range hybrid loader is the vehicle operation waiting mode. If the first duration T1 and / or the second duration T2 is greater than or equal to the second time threshold Tmax, it indicates that the loader has been stationary for a long time and has no power output demand, that is, the current operating mode of the extended-range hybrid loader is the vehicle shutdown and waiting mode.

[0054] The first time threshold Tmin and the second time threshold Tmax are set to distinguish the three working modes of the extended-range hybrid loader, and also to balance the relationship between operation response speed and energy conservation. A too short Tmin leads to frequent switching of working modes, increasing the number of engine starts and stops, while a longer Tmax will miss the energy-saving opportunity of timely switching to the shutdown mode. By reasonably setting these two thresholds, it is possible to achieve efficient use of energy while ensuring operation continuity and response speed. By monitoring the duration of inaction of the accelerator pedal and hydraulic handle, and making intelligent judgments on the working mode based on the preset time thresholds Tmin and Tmax, the working status of the extended-range hybrid loader can be more accurately identified, and then an energy management strategy that matches the working mode can be implemented, significantly improving energy utilization efficiency and operation adaptability.

[0055] In some embodiments of the present application, the current operating mode of the range extender is determined according to the current operating mode of the range extender hybrid loader and the state of charge of the power battery, including: when the current operating mode of the range extender hybrid loader is the vehicle operation mode, if the state of charge of the power battery is less than or equal to the first state of charge threshold, the current operating mode of the range extender is determined to be the maximum fixed-point power generation mode; if the state of charge of the power battery is greater than or equal to the second state of charge threshold, the current operating mode of the range extender is determined to be the standby mode; if the state of charge of the power battery is greater than the first state of charge threshold and less than the second state of charge threshold, the current operating mode of the range extender is determined to be the standby mode. The current operating mode of the range extender is the power follow mode; when the current operating mode of the above-mentioned extended-range hybrid loader is the above-mentioned vehicle operation waiting mode, if the state of charge of the above-mentioned power battery is less than or equal to the above-mentioned first state of charge threshold, the current operating mode of the range extender is determined to be the optimal fixed-point power generation mode; if the state of charge of the above-mentioned power battery is greater than the above-mentioned first state of charge threshold, the current operating mode of the range extender is determined to be the standby mode; when the current operating mode of the above-mentioned extended-range hybrid loader is the above-mentioned vehicle shutdown waiting mode, the current operating mode of the range extender is determined to be the shutdown mode, wherein the above-mentioned first state of charge threshold is less than the above-mentioned second state of charge threshold.

[0056] Specifically, the first state of charge threshold is set to SOCmin, and the second state of charge threshold is set to SOCmax, and the first state of charge threshold is less than the second state of charge threshold. The basis for setting the first state of charge threshold SOCmin and the second state of charge threshold SOCmax is mainly centered around the performance of the power battery, the operating efficiency of the range extender system, and the working requirements of the loader. Specifically, the main considerations for the first state of charge threshold SOCmin and the second state of charge threshold SOCmax include power battery performance, range extender efficiency and economy, operational requirements and responsiveness, battery life and maintenance, and overall energy management. Among them, a key goal of the first state of charge threshold SOCmin and the second state of charge threshold SOCmax is to make the power battery operate in an efficient and healthy range as much as possible; the operating efficiency and fuel economy of the range extender are optimal within a specific power output range. For example, near the optimal operating point of the range extender, its power generation efficiency is high and fuel consumption is low. Therefore, the setting of the first state of charge threshold SOCmin and the second state of charge threshold SOCmax must also ensure that the range extender can operate within its economic operating range, avoiding being forced to operate under less efficient conditions when the battery is overcharged or over-discharged; the loader's operating requirements and operating characteristics require fast response and sufficient transient power support. Setting appropriate first state of charge thresholds SOCmin and second state of charge thresholds SOCmax can ensure that the range extender can quickly intervene in the low state of charge and provide the necessary power to avoid power interruption, while ensuring that the battery can quickly recover to the medium state of charge to cope with possible high power demand in the future. The setting of SOCmax is intended to prevent the battery from overcharging and avoid continuing to charge through the range extender when the battery is high in charge, resulting in energy waste and potential safety risks; the service life of the power battery is inversely proportional to the frequency of its deep charging and discharging. Frequent charging and discharging to extremely low or high SOC states will cause the battery to decay faster. Setting the first SOCmin and second SOCmax thresholds helps limit the battery's SOC range, reducing the battery's operating time at extreme SOCs, thereby extending its service life. To improve the energy efficiency of the entire range-extended hybrid system, the first and second SOCmin thresholds must also take into account the engine's start-stop strategy, the range extender's output power regulation, and the vehicle's energy demand and supply balance. The goal is to optimize the energy flow between the battery and the range extender to achieve the lowest system energy consumption and the highest operating efficiency. In summary, the first and second SOCmin thresholds are set based on a comprehensive consideration of the power battery's characteristics, the range extender's operating efficiency, the loader's operational requirements, battery lifespan maintenance, and energy management optimization. Accurately setting these thresholds is crucial to ensuring the range-extended hybrid loader's stable operation under complex operating conditions, reducing energy consumption, extending battery life, and lowering maintenance costs.

[0057] When the current operating mode of a range-extended hybrid loader is the whole-vehicle operation mode, the range extender currently has three operating modes, depending on the power battery's state of charge (SOC): maximum fixed-point power generation mode, standby mode, and power follower mode. If the power battery's state of charge (SOC) is less than or equal to the first SOC threshold (SOCmin), the range extender enters maximum fixed-point power generation mode. In this mode, the range extender generates electricity at maximum power to quickly raise the battery's SOC to a safer level while meeting the instantaneous power requirements during operation. This strategy facilitates rapid battery recovery, ensuring the loader has sufficient power during operation while reducing the risk of battery overdischarge and extending battery life. If the power battery's SOC is greater than or equal to the second SOC threshold (SOCmax), the range extender enters standby mode and does not generate electricity. This mode is suitable for situations where the battery is fully charged. At this time, no additional charging is required, which can reduce the engine's operating time, save fuel, and reduce unnecessary battery charging and discharging losses and engine wear. If the power battery's state of charge (SOC) is greater than the first state of charge threshold (SOCmin) and less than the second state of charge threshold (SOCmax), the range extender enters the power following mode. In this mode, the range extender's power generation changes according to the vehicle's required power and the battery's SOC, generating power with the optimal power curve to ensure that the engine operates in the fuel economy range while maintaining the battery's state of charge at a medium level to balance energy supply and storage, reduce frequent engine starts and stops, reduce battery charging and discharging losses, and improve energy utilization efficiency. The power following mode ensures that the engine operates in the most economical conditions while maintaining the battery's SOC at a safer and more efficient medium level, which is conducive to balancing energy demand, energy efficiency, and cost.

[0058] When the current operating mode of the extended-range hybrid loader is the vehicle operation waiting mode, the range extender currently has two operating modes: optimal fixed-point power generation mode and standby mode. If the power battery's state of charge (SOC) is less than or equal to the first state of charge threshold (SOCmin), the range extender enters the optimal fixed-point power generation mode to keep the battery SOC in a healthy range. In this mode, the range extender operates at the operating point with the best engine fuel economy, which not only meets the battery charging needs but also ensures efficient energy utilization; if the power battery's state of charge (SOC) is greater than the first state of charge threshold (SOCmin), the range extender automatically enters standby mode and stops generating electricity. This helps avoid unnecessary energy waste and battery overcharging, while reducing engine operating time, fuel consumption, and emissions.

[0059] When the range-extended hybrid loader is currently operating in vehicle standby mode, the range extender enters shutdown mode and stops operating. In this mode, the range-extended hybrid loader is stationary and requires no power output. Therefore, shutting down the range extender maximizes energy conservation, reducing unnecessary fuel consumption and mechanical wear.

[0060] The first SOC threshold, SOCmin, is typically set at a low value to ensure that when the battery charge is low during operation, the range extender can quickly take action to provide sufficient power, preventing the loader from being affected by insufficient power and affecting operational efficiency. The second SOC threshold, SOCmax, is set at a higher level to ensure that the battery has sufficient power reserve during operation and avoid overcharging, extending battery life. It also reduces engine operation when the battery charge is sufficient, saving fuel. In this embodiment, the first SOC threshold, SOCmin, can be set to 30%, and the second SOC threshold, SOCmax, can be set to 70%.

[0061] Through the above process, energy management is effectively optimized based on the real-time operating mode of the extended-range hybrid loader and the power battery's state of charge (SOC), improving overall system performance. In vehicle operation mode, by setting first and second SOC thresholds, the range extender ensures that the power battery's SOC remains within a reasonable range. When the power battery's SOC falls below the first SOC threshold, the range extender automatically switches to maximum fixed-point power generation mode to quickly restore the battery's SOC, meeting high power demands while preventing overcharging or over-discharging. When the power battery's SOC reaches or exceeds the second SOC threshold, the range extender enters standby mode, reducing unnecessary energy consumption. In vehicle operation standby mode, if the power battery's SOC remains below the first SOC threshold, the range extender uses optimal fixed-point power generation mode to maintain the battery at an economical SOC and improve energy efficiency. When the power battery's SOC exceeds the first SOC threshold, the range extender enters standby mode, further reducing energy consumption. In vehicle shutdown mode, the range extender directly enters shutdown mode, achieving maximum energy savings. This range extender control strategy, based on the power battery's state of charge and operating mode, not only improves the loader's operating efficiency and fuel economy, but also effectively extends battery life and reduces frequent engine starts and stops, ultimately enhancing the reliability and economy of the range-extended hybrid loader while minimizing its environmental impact. By precisely controlling the range extender's current operating mode, it enables smooth transitions between different operating phases and battery state of charge, ensuring efficient energy management in diverse scenarios, including high-load operation, waiting for work, and idle waiting.

[0062] In this embodiment, an artificial intelligence algorithm can be introduced, combined with deep learning and big data analysis, to predict the loader's next operating demand and load changes, and adjust the engine and battery operating conditions in advance based on the predicted results. This algorithm can predict the future short-term operating intensity and energy demand based on historical operating data and real-time sensor information (including throttle position, battery SOC, ambient temperature, operating mode, etc.). Based on the predicted results, it intelligently switches between maximum fixed-point power generation mode, optimal fixed-point power generation mode, and power follower mode, while also adjusting the engine preheating and battery pre-charge status to ensure that the engine and battery are in optimal working readiness before the peak operating demand. This reduces the response time of mode switching, improves operating efficiency and energy utilization, and reduces energy consumption and emissions. The integrated intelligent module of the Electronic Control Unit (ECU) and Vehicle Control Unit (VCU) can collect and analyze loader operating data, and use artificial intelligence algorithms to make real-time predictions and decisions. This method can dynamically predict the operating mode and adjust the engine and battery status 3-5 seconds in advance to optimize operating efficiency and energy management.

[0063] In other embodiments of the present application, the current required power generation power of the range extender is determined based on the current operating mode of the range extender, the required power of the range extender hybrid loader and the charge state of the power battery, wherein the required power of the range extender hybrid loader is obtained based on the current operating mode of the range extender hybrid loader, including: when the current operating mode of the range extender hybrid loader is the whole vehicle operation mode, if the current operating mode of the range extender is the maximum fixed-point power generation mode, determining that the current required power generation power of the range extender is the rated power of the range extender; if the current operating mode of the range extender is the standby mode, determining that the current required power generation power of the range extender is zero; if the current operating mode of the range extender is the power following mode, the current required power generation power of the range extender is determined according to the interpolation of the power generation power MAP of the range extender power following mode, wherein In the figure, the horizontal coordinate of the power generation power MAP in the power following mode of the range extender is the required power of the range-extended hybrid loader, and the vertical coordinate of the power generation power MAP in the power following mode of the range extender is the current required power generation power of the range extender; when the current working mode of the range-extended hybrid loader is the whole vehicle operation waiting mode, if the current working mode of the range extender is the optimal fixed-point power generation mode, the current required power generation power of the range extender is determined to be the output power of the range extender corresponding to the engine operating at the high-efficiency point, and the high-efficiency point is obtained according to the preset fuel consumption rate MAP and the preset increase efficiency MAP. If the current working mode of the range extender is the standby mode, the current required power generation power of the range extender is determined to be zero; when the current working mode of the range-extended hybrid loader is the whole vehicle stop waiting mode, the current required power generation power of the range extender is determined to be zero.

[0064] Specifically, Figure 4 This is the flow chart of the multi-mode power generation control strategy for the range-extended hybrid loader. Figure 4 As shown, when the range-extended hybrid loader is in full-vehicle operation mode and the power battery's state of charge (SOC) is less than or equal to the first state-of-charge threshold (SOCmin), the range extender's current operating mode will automatically switch to maximum fixed-point power generation mode. At this time, the range extender is set to operate at its rated power to quickly replenish the power battery, ensuring that the battery SOC returns to a healthier level while meeting the vehicle's high power requirements. In the range extender's maximum fixed-point power generation mode, the range extender's current required power generation power Pe is its rated power Pmax, that is, Pe = Pmax.

[0065] If the current operating mode of the range extender is the maximum fixed-point power generation mode, after determining that the current required power generation power of the range extender is the rated power of the range extender, it is detected whether the current operating mode of the above-mentioned extended-range hybrid loader is the above-mentioned whole-vehicle operation mode; if the current operating mode of the above-mentioned extended-range hybrid loader is not the above-mentioned whole-vehicle operation mode, the above-mentioned current operating mode of the above-mentioned extended-range hybrid loader enters the above-mentioned whole-vehicle operation waiting mode; if the above-mentioned current operating mode of the above-mentioned extended-range hybrid loader is the above-mentioned whole-vehicle operation mode, it is detected whether the state of charge SOC of the above-mentioned power battery is greater than or equal to the third state of charge threshold SOCmiddle; if the state of charge of the above-mentioned power battery is greater than or equal to the above-mentioned third state of charge threshold, the current operating mode of the above-mentioned range extender enters the above-mentioned power following mode; if the state of charge of the above-mentioned power battery is less than the above-mentioned third state of charge threshold, the current operating mode of the above-mentioned range extender remains in the above-mentioned maximum fixed-point power generation mode.

[0066] When the range extender is currently in maximum fixed-point power generation mode, this means the power battery's state of charge (SOC) is below the first state-of-charge threshold (SOCmin), allowing rapid charging at rated power. However, for more intelligent energy management, further monitoring of the vehicle's current operating mode and the power battery's state of charge changes is required. First, the loader checks whether it is still in full-vehicle operation mode. If not, indicating that operations have been paused, the range extender should exit maximum fixed-point power generation mode and enter full-vehicle operation standby mode. This transition helps avoid overcharging during non-operational periods, saving energy while reducing battery charge and discharge cycles and extending battery life. If the loader is still in full-vehicle operation mode, the range extender then evaluates whether the power battery's state of charge has recovered to or exceeded the third state-of-charge threshold (SOCmiddle). This threshold is designed to ensure a smooth transition from high-power charging mode to the more energy-efficient power-following mode once the battery's state of charge has recovered to a certain level.

[0067] The third state-of-charge threshold (SOCmiddle) is primarily determined by the performance characteristics of the power battery, the requirements of the energy management system, and the loader's operating characteristics. Key factors include: Battery efficiency and lifespan: A power battery's charge and discharge efficiency is highest at a medium state of charge (SOCmiddle), while also minimizing the impact on battery life. Setting the third SOCmiddle threshold within this range helps maintain optimal battery operation and extend its service life. Energy management balance point: The third SOCmiddle threshold can be considered a balance point for the energy management system, ensuring that the battery is neither overcharged nor over-discharged under normal operating conditions. When the power battery's SOC is below the third SOCmiddle threshold, a higher-power charging strategy (such as maximum fixed-point power generation mode) is preferred to rapidly restore battery energy. When the power battery's SOC reaches or exceeds the third SOCmiddle threshold, a more energy-efficient strategy (such as power-following mode) is adopted to avoid excess energy and excessive loss. Range extender efficiency: The range extender operates most efficiently at a specific power output, typically corresponding to the engine's economic operating point. The setting of the third state of charge threshold SOCmiddle must take into account the coordination between the range extender and the battery, ensuring that the range extender can operate at a relatively stable efficiency when the battery SOC reaches this threshold, rather than fluctuating between high load or low load ranges. In short, the setting of the third state of charge threshold SOCmiddle is a comprehensive consideration process, aiming to balance the relationship between the efficiency and life of the power battery, the operating efficiency of the range extender, and the operating requirements of the loader, to ensure optimal energy management and performance. In this embodiment, the third state of charge threshold SOCmiddle can be set to 50%.

[0068] Among them, in the range extender's maximum fixed-point power generation mode, the range extender generates electricity at its maximum continuous capacity, charging the battery at its maximum continuous capacity while meeting the power requirements of the entire vehicle, so that the battery can recover from the sub-healthy state of low SOC to the healthy state of medium SOC as soon as possible. The battery charging and discharging efficiency in the medium SOC state is also higher than that in the low SOC state, so it is beneficial to extend battery life and improve battery efficiency. In addition, it prepares power reserves for sudden transient load increases on the loader to avoid the risk of transient power shortage.

[0069] By real-time monitoring of the range-extended hybrid loader's current operating mode and the power battery's state of charge (SOC), the range extender's current operating mode can be intelligently adjusted. When the power battery's SOC falls below the third SOC threshold and the loader is in operation mode, the range extender maintains maximum fixed-point power generation mode to quickly replenish the battery and meet high power demands. Once the power battery's SOC returns to or exceeds the third SOC threshold, the range extender immediately switches to power-following mode, dynamically adjusting the range extender's power generation based on the vehicle's actual needs. This ensures power demand is met while avoiding resource waste and improving energy efficiency. In vehicle-in-operation mode, timely energy replenishment ensures continuous power and operational efficiency for the loader. Furthermore, the introduction of power-following mode enables the range extender to more closely track vehicle needs, reducing unnecessary energy storage and release, minimizing losses caused by battery charging and discharging, and enhancing overall system reliability and stability. Dynamically adjusting the range extender's power generation mode, particularly by avoiding prolonged periods of high-intensity charging, helps reduce deep charge and discharge cycles in the battery, effectively extending its lifespan. In short, through the above control mechanism, the extended-range hybrid loader can manage its energy system more intelligently, not only effectively ensuring the power demand during operation, but also taking into account energy utilization efficiency, battery life, cost control and environmental protection requirements, achieving a comprehensive improvement in system performance.

[0070] See also Figure 4 When the range-extended hybrid loader is in full-vehicle operation mode and the range extender is currently operating in maximum fixed-point power generation mode, and the power battery's state of charge (SOC) is greater than a first state-of-charge threshold (SOCmin), the range extender is determined to determine whether the power battery's SOC is greater than or equal to a second state-of-charge threshold (SOCmax). If so, the range extender enters standby mode. In standby mode, the range extender's current required power generation power (Pe) is 0, i.e., Pe = 0. The range extender is in standby mode, and power is supplied by the power battery to other electronic devices in the vehicle. The vehicle is then tested to determine whether it is in full-vehicle operation mode. If not, the vehicle enters full-vehicle operation standby mode. If so, the power battery's state of charge (SOC) is further determined to determine whether it is less than or equal to a third state-of-charge threshold (SOCmiddle). If so, the range extender enters power follower mode; otherwise, the range extender remains in standby mode.

[0071] If the power battery's state of charge (SOC) is less than the second state of charge threshold (SOCmax), the range extender enters power-following mode. In power-following mode, the range extender's current required power generation (Pe) is determined by interpolation of the range extender's power generation (MAP) in power-following mode, i.e., Pe = Pmap. The vehicle is then checked to see if it is in full-vehicle operation mode. If not, the vehicle enters full-vehicle operation standby mode. If so, the power battery's state of charge (SOC) is checked to determine the range extender mode.

[0072] Figure 5 This is a diagram of the range extender's power generation power map in power-following mode. The horizontal axis of the range extender's power generation power map represents the required power of the range extender hybrid loader, and the vertical axis represents the current required power generation power of the range extender. The broken lines represent different power battery SOCs, based on the power battery's mid-threshold SOC. In this example, the mid-threshold SOC is 50%. The broken lines for other SOCs shift left and right based on the mid-threshold SOC. The required range extender power generation power is interpolated from this map. The power-following mode power generation map specifies the required range extender power generation power for different vehicle power requirements and power battery states of charge. This allows the range extender's power generation power to be adjusted based on the battery SOC and vehicle power requirements to meet different operating conditions. Under the same SOC, the required range extender power generation power is proportional to the vehicle power requirement in a linear function, achieving range extender power following, improving battery life, and reducing battery charge and discharge losses. Under the same vehicle power demand condition, the required range extender power generation is inversely proportional to the power battery SOC. The lower the power battery SOC, the greater the required range extender power generation. At the same time, the upper and lower limits of the range extender power generation are set to make the range extender power generation vary within a certain range. This realizes the dynamic adjustment of the battery SOC and ensures that the battery SOC is as close to the middle SOC interval as possible. The middle SOC interval is the healthy interval of the power battery with high charging and discharging efficiency, thereby extending the battery life and improving the energy utilization rate of the whole vehicle, which is beneficial to reducing the fuel consumption of the whole vehicle. At the same time, the upper and lower limits of the range extender power generation limit the engine's operating conditions to the engine's economic fuel consumption zone, that is, Figure 5 In the example, the range extender's power generation capacity of 40kW and 100kW is the minimum and maximum limit of the engine's economic fuel consumption zone corresponding to the range extender's power generation capacity, so that the engine always runs in the economic fuel consumption zone, reducing the fuel consumption of the entire vehicle.

[0073] Figure 6 This is the flow chart of the power generation control strategy in the vehicle operation waiting mode, such as Figure 6As shown, when the current working mode of the range-extended hybrid loader is in the vehicle operation waiting mode, it is determined whether the state of charge (SOC) of the power battery is less than or equal to the first state of charge threshold value (SOCmin). If so, the range extender enters the optimal fixed-point power generation mode. When the range extender is in the optimal fixed-point power generation mode, the current required power generation power Pe of the range extender is the range extender output power Pbest corresponding to the most economical point of the engine fuel (the range extender output power corresponding to the engine operating at the high efficiency point), that is, Pe=Pbest. At this time, the power consumption of other electronic equipment in the vehicle is better than that provided by the power battery. It is detected whether the current state of the vehicle is the vehicle stop waiting mode. If so, the vehicle enters the vehicle stop waiting mode; if not, it is detected whether the current state of the vehicle is the vehicle operation waiting mode. If not, the vehicle enters the vehicle operation mode; if so, it further detects whether the state of charge (SOC) of the power battery is greater than or equal to the third state of charge threshold value (SOCmiddle). If so, the range extender enters the standby mode; if not, the optimal fixed-point power generation mode is continued.

[0074] The high-efficiency point (EFP) refers to the operating condition at which the engine operates at its most economical and efficient state. It combines high power generation efficiency with low fuel consumption, making it an ideal operating condition for energy management and energy conservation and emission reduction. The preset fuel consumption map (MAP) is a mapping table of engine fuel consumption at different speeds and torques. This table, pre-determined through experimental testing and data analysis, details the amount of fuel consumed per unit of power output at various engine speeds and torques. Using this table, one can find the speed and torque combination that results in the lowest fuel consumption, known as the EFP. The preset boost efficiency map (MAP) describes the range extender's efficiency in converting engine mechanical energy into electrical energy under different operating conditions. This parameter, also determined through experimental testing and data analysis, is recorded in a specific operating condition table. The preset boost efficiency map reveals the range extender's conversion efficiency at different speeds and torques, helping to identify the operating condition with the highest power generation efficiency. By querying the preset fuel consumption map and the preset boost efficiency map, one can identify the speed and torque combination that achieves the EFP. The EFP is designed to achieve both the lowest fuel consumption and the highest power generation efficiency. Once the speed and torque at the efficient point are determined, the required power generation can be calculated using the engine's mechanical power output at that point and the range extender's efficiency. Typically, this calculation involves converting the engine's output power into electrical energy to ensure the range extender generates electricity efficiently and economically.

[0075] In the range extender's optimal fixed-point power generation mode, the range extender generates electricity at the engine's most economical operating point to restore the battery from a low SOC state to a healthy medium SOC state as quickly as possible, which is beneficial to extending battery life and improving battery efficiency. It should be noted that at this time the loader has no transient load surge demand and no risk of transient power shortage, so the range extender does not need to generate electricity at rated power, and generates electricity at the engine's most economical operating point to achieve low fuel consumption for the entire vehicle.

[0076] See also Figure 6 When the current working mode of the range-extended hybrid loader is in the vehicle operation waiting mode, if the state of charge SOC of the power battery is greater than the first state of charge threshold SOCmin, the range extender enters the standby mode. When the range extender is in the standby mode, the current required power generation power Pe of the range extender is 0, that is, Pe=0. At this time, the range extender is on standby, and the power consumption of other electronic equipment in the vehicle is prioritized over that of the power battery. It is detected whether the vehicle is in the vehicle stop waiting mode at this moment. If so, the vehicle enters the vehicle stop waiting mode; if not, it is detected whether the vehicle is in the vehicle operation waiting mode at this moment. If not, it enters the vehicle operation proceeding mode; if so, it detects the power battery's state of charge SOC and enters the range extender mode judgment.

[0077] When the range-extended hybrid loader is in the vehicle stop waiting mode, the range extender enters the stop mode, the range extender stops working, and the range extender's current required power generation power is zero. Afterwards, it is detected whether the above-mentioned current working mode of the range-extended hybrid loader is the above-mentioned vehicle stop waiting mode; if the above-mentioned current working mode of the range-extended hybrid loader is the above-mentioned vehicle stop waiting mode, the above-mentioned current working mode of the range extender is the stop mode; if the above-mentioned current working mode of the range-extended hybrid loader is not the above-mentioned vehicle stop waiting mode, the range extender generator reverses to start the above-mentioned engine, and the above-mentioned current working mode of the range-extended hybrid loader enters the above-mentioned vehicle operation mode. The start control flow chart from the vehicle stop waiting mode to the vehicle operation mode is as follows: Figure 7 shown.

[0078] Specifically, when transitioning from vehicle standby mode to vehicle operating mode, the engine is started using a generator reverse start method. Specifically, upon receiving the start command, the generator temporarily switches to electric motor function, using stored battery energy to drive the engine to the starting state. Compared to traditional starting methods, this method reaches the engine's normal operating temperature and speed more quickly, reducing startup time, while also reducing startup energy consumption and impact on the engine and starting system. Through intelligent mode detection and dynamic adjustment, the range-extended hybrid loader significantly optimizes energy management and start-up response in standby mode. When the loader is in standby mode, the range extender is set to standby mode, reducing power generation to zero. This effectively conserves energy, reduces fuel consumption, and reduces emissions, while also extending the life of the engine and battery. More importantly, once the loader detects that it has left standby mode, the range extender is instantly activated. Through the efficient generator reverse start method, the engine quickly responds and enters operating mode, significantly improving operational efficiency and power system continuity. This mechanism ensures energy conservation and environmental protection while maintaining the flexibility and responsiveness of the loader's operations, achieving dual optimization of energy utilization efficiency and operating performance.

[0079] By precisely matching the range extender's operating mode with the loader's required power, and taking into account the battery's state of charge, intelligent adjustment of the range extender's power generation is achieved, aiming to improve energy efficiency, extend battery and engine life, and reduce overall energy consumption and emissions. In the vehicle's operating mode, the range extender's operating state is flexibly adjusted (from efficient high-power power generation to zero-power standby, and then to dynamic following according to actual demand), ensuring sufficient power while avoiding excessive resource consumption. In particular, the power following mode uses the range extender's power following mode power generation MAP to accurately synchronize the range extender's power generation with the vehicle's immediate needs, effectively reducing battery charging and discharging losses. In the operation waiting and shutdown waiting modes, the strategy of generating electricity at the engine's high-efficiency point or completely shutting down not only reduces unnecessary energy consumption, but also further improves fuel economy by reducing the engine's non-economic operating conditions.

[0080] In still other embodiments of the present application, determining a generator target speed and an engine target torque based on the currently required power generation power of the range extender, a preset range extender output power curve, and a preset engine fuel efficiency characteristic curve includes: determining, based on the currently required power generation power of the range extender, the preset range extender output power curve, and the preset engine fuel efficiency characteristic curve, an engine operating condition point corresponding to the currently required power generation power of the range extender by a lookup or interpolation algorithm, wherein the engine operating condition point is a speed and torque at which the engine meets a predetermined fuel efficiency standard while providing the currently required power generation power of the range extender; determining the speed as the generator target speed, and determining the torque as the engine target torque, wherein the preset range extender output power curve and the preset engine fuel efficiency characteristic curve are obtained through bench testing during the engine development stage and stored in a vehicle control system for determining the engine operating parameters based on the currently required power generation power of the range extender.

[0081] Specifically, the preset range extender output power curve and the preset engine fuel efficiency characteristic curve are carefully developed during the engine development phase through bench testing to reflect engine performance under different speed and torque conditions. These curves are stored in the vehicle control system and serve as core data to guide the setting of engine and generator operating parameters. The preset range extender output power curve shows the relationship between engine output power and its operating parameters, while the preset engine fuel efficiency characteristic curve reveals the changes in engine fuel efficiency under different operating conditions.

[0082] Once the range extender's current required power output is determined, the next step is to find the optimal engine operating point that can meet this power output while remaining within pre-determined fuel efficiency standards. This is done using a search or interpolation algorithm, searching the preset range extender output power curve and the preset engine fuel efficiency characteristic curve. The search algorithm directly locates the operating point closest to the required power output on the stored curve data, while the interpolation algorithm estimates between two known operating points to obtain more accurate operating parameters. This process ensures that a suitable engine operating point can be found even for power requirements not directly covered by the curve data. Once the engine operating point corresponding to the required power output is found, the speed and torque at that point are determined as the generator target speed and engine target torque, respectively. This ensures that the engine operates within the high-efficiency range for maximum fuel efficiency and minimum emissions while providing the required power, thus achieving an optimal balance between power output and energy efficiency.

[0083] According to the principle of optimal fuel economy, based on the current required power generation power of the range extender Pe=Pmax, Pe=Pbest and Pe=Pmap, the preset range extender output power curve and the preset engine fuel efficiency characteristic curve, the engine speed and torque corresponding to the current required power generation power of the range extender Pe=Pmax, Pe=Pbest and Pe=Pmap are found, and the speed of the generator and the torque of the engine are set respectively according to the speed and torque.

[0084] Through the above process, the extended-range hybrid loader achieves highly refined energy management, ensuring that the engine operates at its most economical operating point while meeting power requirements. This not only improves overall energy efficiency but also extends the engine's service life by reducing uneconomical operating time. Furthermore, by precisely controlling the operating parameters of the generator and engine, the battery's charge and discharge cycles are reduced, extending its service life and further improving the reliability and economic efficiency of the entire system. Overall, intelligent control enables efficient, economical, and environmentally friendly operation of the loader in complex operating environments.

[0085] In some further embodiments of the present application, the operating states of the engine and the generator are controlled according to the current operating mode of the extended-range hybrid loader, the target speed of the generator and the target torque of the engine, including: controlling the engine to stop or start based on the current operating mode of the extended-range hybrid loader, the target torque of the engine and the target speed of the generator, or controlling the engine operation according to the engine target torque and controlling the generator operation according to the generator target speed based on the current operating mode of the extended-range hybrid loader.

[0086] Specifically, based on the current operating mode of the range-extended hybrid loader (vehicle operation mode, vehicle operation waiting mode, vehicle shutdown waiting mode), as well as the target engine torque and generator speed, the following control strategy is adopted:

[0087] Engine shutdown or start: In vehicle standby mode, if the range extender's current power generation demand is zero, the engine is shut down to save energy and reduce emissions. When the loader switches from standby mode to other modes, particularly vehicle operation mode, the engine is started by reverse-driving the generator based on the required engine target torque, quickly responding to operational needs.

[0088] Engine and generator operating parameter control: In either vehicle operation mode or vehicle operation standby mode, the engine and generator operating states are controlled based on the target engine torque and generator speed. Specifically, the engine operates at the target torque to provide the required mechanical power or electrical energy, while the generator operates at the target speed to ensure the range extender's power generation efficiency meets the vehicle's electrical energy requirements. This precise control strategy ensures the engine and generator operate at the highest efficiency in all modes, adapting to the rapid changes in the loader's operating mode and the transient response requirements.

[0089] Through a dynamic and precise control mechanism for the engine and generator operating status, the range-extended hybrid loader's energy efficiency and response speed are significantly improved, while also extending the service life of key components and reducing emissions. By flexibly adjusting engine start and stop, precisely controlling its operating torque, and appropriately setting the generator's target speed, the system seamlessly transitions the loader between vehicle operation mode, vehicle operation standby mode, and vehicle shutdown standby mode, ensuring the engine always operates under optimal conditions and the generator provides the required electrical energy without excessive consumption. This achieves refined energy management while meeting operational needs, reducing unnecessary energy waste and lowering operating costs. This strategy also reduces the engine's operating time in uneconomic conditions, effectively extending the service life of the engine and battery.

[0090] This embodiment introduces an adaptive multi-level SOC control strategy that dynamically adjusts the first, second, and third state-of-charge thresholds (SOCmin, SOCmax, and SOCmiddle) based on different operating modes and load types. In vehicle operation mode, the strategy intelligently adjusts the SOC thresholds based on load intensity to ensure sufficient battery charge during high loads, while prioritizing charging during low loads to achieve optimal energy balance. In vehicle operation waiting and vehicle shutdown waiting modes, the strategy adjusts the SOC thresholds based on predicted operating requirements to maintain the battery near the median SOC, reducing unnecessary charging and discharging, extending battery life, and reducing energy consumption. The battery SOC can be monitored by a microcontroller unit (MCU), which, in conjunction with the ECU and VCU, adjusts the SOC thresholds in real time based on the operating mode and load type. This strategy utilizes preset SOC threshold adjustment rules to intelligently match the most appropriate SOC management strategy based on operating intensity and mode, effectively controlling battery charging and discharging, ensuring the battery is always in optimal operating condition, and improving vehicle energy efficiency and reliability.

[0091] The embodiment of the present application also provides a power generation control device for an extended-range hybrid loader. It should be noted that the power generation control device for an extended-range hybrid loader in the embodiment of the present application can be used to execute the power generation control method for an extended-range hybrid loader provided in the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred implementation methods, and those that have been explained will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and conceivable.

[0092] The following introduces the power generation control device of the extended-range hybrid loader provided in the embodiment of the present application.

[0093] Figure 8 FIG is a structural block diagram of a power generation control device for a range-extended hybrid loader according to an embodiment of the present application. Figure 8 As shown, the device includes a monitoring unit 10, a determining unit 20 and a control unit 30. The monitoring unit is used to determine the current operating mode of the range extender according to the current operating mode of the range extender hybrid loader and the charge state of the power battery, and determine the current required power generation power of the range extender based on the current operating mode of the range extender, the required power of the range extender hybrid loader and the charge state of the power battery, wherein the required power of the range extender hybrid loader is obtained based on the current operating mode of the range extender hybrid loader; the determining unit is used to determine the current operating mode of the range extender according to the current operating mode of the range extender hybrid loader and the charge state of the power battery, and determine the current required power generation power of the range extender based on the current operating mode of the range extender hybrid loader. The control unit is configured to determine the current required power generation power of the range extender based on the working mode, the required power of the above-mentioned extended-range hybrid loader and the state of charge of the above-mentioned power battery, wherein the required power of the above-mentioned extended-range hybrid loader is obtained based on the above-mentioned current working mode of the above-mentioned extended-range hybrid loader; the control unit is configured to determine the generator target speed and the engine target torque according to the above-mentioned current required power generation power of the range extender, a preset range extender output power curve and a preset engine fuel efficiency characteristic curve, and control the operating states of the engine and the generator according to the above-mentioned current working mode of the extended-range hybrid loader, the above-mentioned generator target speed and the above-mentioned engine target torque.

[0094] Through this embodiment, the real-time operating parameters and driving operation information of the extended-range hybrid loader are continuously monitored, and the specific working mode of the extended-range hybrid loader in which the operation is in progress, the operation is waiting or the shutdown is waiting is intelligently identified. This identification process ensures that the driver's operating intention and the vehicle's operating needs can be responded to in a timely manner, laying the foundation for the subsequent energy management mode selection; based on the identified current working mode of the loader and the state of charge (SOC) of the power battery, the current working mode of the range extender is dynamically adjusted, and the current required power generation power of the range extender that best suits the current scenario is calculated accordingly, which not only effectively balances the battery charge and discharge cycle, reduces battery loss, but also prolongs the service life. It not only extends the battery life, but also ensures that the engine operates in the optimal fuel efficiency range, greatly improves energy utilization efficiency and reduces fuel consumption; according to the current required power generation power of the range extender, combined with the preset range extender output power curve and the preset engine fuel efficiency characteristic curve, the generator target speed and engine target torque are intelligently determined. Based on these parameters, the operating status of the engine and generator can be accurately controlled to ensure that while meeting the power requirements of the loader, it operates at the most economical and efficient operating point, thereby reducing the number of engine starts and stops and reducing losses in the energy conversion process, thereby solving the problem of low energy efficiency of extended-range hybrid loaders in the existing technology.

[0095] In a specific implementation process, the monitoring unit includes a monitoring module, a first determination module, a second determination module, and a third determination module. The monitoring module is configured to monitor the real-time operating parameters and driving operation information of the extended-range hybrid loader to determine a first duration of no throttle opening signal and / or a second duration of no hydraulic working device operating handle signal of the extended-range hybrid loader; the first determination module is configured to determine that the current operating mode of the extended-range hybrid loader is the vehicle operation mode when the first duration and / or the second duration are less than or equal to a first time threshold; the second determination module is configured to determine that the current operating mode of the extended-range hybrid loader is the vehicle operation waiting mode when the first duration and / or the second duration are greater than the first time threshold and less than a second time threshold; and the third determination module is configured to determine that the current operating mode of the extended-range hybrid loader is the vehicle stop waiting mode when the first duration and / or the second duration are greater than or equal to the second time threshold, wherein the first time threshold is less than the second time threshold.

[0096] The first time threshold Tmin and the second time threshold Tmax are set to distinguish the three working modes of the extended-range hybrid loader, and also to balance the relationship between operation response speed and energy conservation. A too short Tmin leads to frequent switching of working modes, increasing the number of engine starts and stops, while a longer Tmax will miss the energy-saving opportunity of timely switching to the shutdown mode. By reasonably setting these two thresholds, it is possible to achieve efficient use of energy while ensuring operation continuity and response speed. By monitoring the duration of inaction of the accelerator pedal and hydraulic handle, and making intelligent judgments on the working mode based on the preset time thresholds Tmin and Tmax, the working status of the extended-range hybrid loader can be more accurately identified, and then an energy management strategy that matches the working mode can be implemented, significantly improving energy utilization efficiency and operation adaptability.

[0097] In some embodiments of the present application, the above-mentioned determination unit includes a fourth determination module, a fifth determination module and a sixth determination module. The fourth determination module is used to determine that the current working mode of the range extender is the maximum fixed-point power generation mode if the state of charge of the power battery is less than or equal to the first state of charge threshold value when the current working mode of the range extender hybrid loader is the whole vehicle operation mode; if the state of charge of the power battery is greater than or equal to the second state of charge threshold value, the current working mode of the range extender is determined to be the standby mode; if the state of charge of the power battery is greater than the first state of charge threshold value and less than the second state of charge threshold value, the current working mode of the range extender is determined to be the power following mode; the fifth determination module is used to determine that the current working mode of the range extender is the power following mode when the current working mode of the range extender hybrid loader is the whole vehicle operation mode. When the current operating mode of the power loader is the vehicle operation waiting mode, if the state of charge of the power battery is less than or equal to the first state of charge threshold, the current operating mode of the range extender is determined to be the optimal fixed-point power generation mode; if the state of charge of the power battery is greater than the first state of charge threshold, the current operating mode of the range extender is determined to be the standby mode; the sixth determination module is used to determine that the current operating mode of the range extender is the shutdown mode when the current operating mode of the extended-range hybrid loader is the vehicle shutdown waiting mode, wherein the first state of charge threshold is less than the second state of charge threshold.

[0098] Through the above process, energy management is effectively optimized based on the real-time operating mode of the extended-range hybrid loader and the power battery's state of charge (SOC), improving overall system performance. In vehicle operation mode, by setting first and second SOC thresholds, the range extender ensures that the power battery's SOC remains within a reasonable range. When the power battery's SOC falls below the first SOC threshold, the range extender automatically switches to maximum fixed-point power generation mode to quickly restore the battery's SOC, meeting high power demands while preventing overcharging or over-discharging. When the power battery's SOC reaches or exceeds the second SOC threshold, the range extender enters standby mode, reducing unnecessary energy consumption. In vehicle operation standby mode, if the power battery's SOC remains below the first SOC threshold, the range extender uses optimal fixed-point power generation mode to maintain the battery at an economical SOC and improve energy efficiency. When the power battery's SOC exceeds the first SOC threshold, the range extender enters standby mode, further reducing energy consumption. In vehicle shutdown mode, the range extender directly enters shutdown mode, achieving maximum energy savings. This range extender control strategy, based on the power battery's state of charge and operating mode, not only improves the loader's operating efficiency and fuel economy, but also effectively extends battery life and reduces frequent engine starts and stops, ultimately enhancing the reliability and economy of the range-extended hybrid loader while minimizing its environmental impact. By precisely controlling the range extender's current operating mode, it enables smooth transitions between different operating phases and battery state of charge, ensuring efficient energy management in diverse scenarios, including high-load operation, waiting for work, and idle waiting.

[0099] In some other embodiments of the present application, the determination unit includes a seventh determination module, an eighth determination module and a ninth determination module. The seventh determination module is used for, when the current working mode of the range extender hybrid loader is the whole vehicle operation mode, if the current working mode of the range extender is the maximum fixed-point power generation mode, determining that the current required power generation power of the range extender is the rated power of the range extender; if the current working mode of the range extender is the standby mode, determining that the current required power generation power of the range extender is zero; if the current working mode of the range extender is the power following mode, determining the current required power generation power of the range extender based on the interpolation of the power generation power MAP of the range extender power following mode, wherein the horizontal coordinate of the power generation power MAP of the range extender power following mode is the required power of the range extender hybrid loader, and the vertical coordinate of the power generation power MAP of the range extender power following mode is the required power of the range extender. is the currently required power generation power of the range extender; the eighth determination module is used to, when the current operating mode of the range-extended hybrid loader is the vehicle operation waiting mode, if the current operating mode of the range extender is the optimal fixed-point power generation mode, determine that the currently required power generation power of the range extender is the output power of the range extender corresponding to the engine operating at the high-efficiency point, the high-efficiency point is obtained according to the preset fuel consumption rate MAP and the preset increase efficiency MAP, and if the current operating mode of the range extender is the standby mode, determine that the currently required power generation power of the range extender is zero; the ninth determination module is used to, when the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode, determine that the currently required power generation power of the range extender is zero.

[0100] The seventh determination module includes a first detection submodule, which is used to detect whether the current operating mode of the range extender is the vehicle operation mode after determining that the current required power generation power of the range extender is the rated power of the range extender if the current operating mode of the range extender is the maximum fixed-point power generation mode; if the current operating mode of the range extender is not the vehicle operation mode, the current operating mode of the range extender enters the vehicle operation waiting mode; if the current operating mode of the range extender is the vehicle operation mode, detect whether the state of charge (SOC) of the power battery is greater than or equal to a third state of charge threshold (SOCmiddle); if the state of charge (SOC) of the power battery is greater than or equal to the third state of charge threshold, the current operating mode of the range extender enters the power following mode; if the state of charge (SOC) of the power battery is less than the third state of charge threshold, the current operating mode of the range extender remains in the maximum fixed-point power generation mode.

[0101] By real-time monitoring of the range-extended hybrid loader's current operating mode and the power battery's state of charge (SOC), the range extender's current operating mode can be intelligently adjusted. When the power battery's SOC falls below the third SOC threshold and the loader is in operation mode, the range extender maintains maximum fixed-point power generation mode to quickly replenish the battery and meet high power demands. Once the power battery's SOC returns to or exceeds the third SOC threshold, the range extender immediately switches to power-following mode, dynamically adjusting the range extender's power generation based on the vehicle's actual needs. This ensures power demand is met while avoiding resource waste and improving energy efficiency. In vehicle-in-operation mode, timely energy replenishment ensures continuous power and operational efficiency for the loader. Furthermore, the introduction of power-following mode enables the range extender to more closely track vehicle needs, reducing unnecessary energy storage and release, minimizing losses caused by battery charging and discharging, and enhancing overall system reliability and stability. Dynamically adjusting the range extender's power generation mode, particularly by avoiding prolonged periods of high-intensity charging, helps reduce deep charge and discharge cycles in the battery, effectively extending its lifespan. In short, through the above control mechanism, the extended-range hybrid loader can manage its energy system more intelligently, not only effectively ensuring the power demand during operation, but also taking into account energy utilization efficiency, battery life, cost control and environmental protection requirements, achieving a comprehensive improvement in system performance.

[0102] The ninth determination module includes a second detection submodule, which is used to detect whether the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode after determining that the current required power generation power of the range extender is zero when the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode; if the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode, the current operating mode of the range extender is the stop mode; if the current operating mode of the range-extended hybrid loader is not the vehicle stop waiting mode, the range extender generator reverses to start the engine, and the current operating mode of the range-extended hybrid loader enters the vehicle operation mode.

[0103] Through intelligent mode detection and dynamic adjustment, the energy management and startup response of the extended-range hybrid loader in the stop-and-wait mode are significantly optimized. When the loader is in the stop-and-wait state, the range extender is set to stop mode, and the power generation capacity is reduced to zero, effectively saving energy, reducing fuel consumption and emissions, while extending the service life of the engine and battery. More importantly, once the loader is detected to have left the stop-and-wait mode, the range extender can be instantly activated. Through the efficient generator reverse start method, the engine can respond quickly and enter the operation mode, greatly improving the operation efficiency and the continuity of the power system. This mechanism ensures that while saving energy and protecting the environment, the flexibility and responsiveness of the loader's operation are not lost, achieving the dual optimization of energy utilization efficiency and operation performance.

[0104] By precisely matching the range extender's operating mode with the loader's required power, and taking into account the battery's state of charge, intelligent adjustment of the range extender's power generation is achieved, aiming to improve energy efficiency, extend battery and engine life, and reduce overall energy consumption and emissions. In the vehicle's operating mode, the range extender's operating state is flexibly adjusted (from efficient high-power power generation to zero-power standby, and then to dynamic following according to actual demand), ensuring sufficient power while avoiding excessive resource consumption. In particular, the power following mode uses the range extender's power following mode power generation MAP to accurately synchronize the range extender's power generation with the vehicle's immediate needs, effectively reducing battery charging and discharging losses. In the operation waiting and shutdown waiting modes, the strategy of generating electricity at the engine's high-efficiency point or completely shutting down not only reduces unnecessary energy consumption, but also further improves fuel economy by reducing the engine's non-economic operating conditions.

[0105] In some further embodiments of the present application, the control unit includes a tenth determination module and an eleventh determination module. The tenth determination module is configured to determine, based on the current required power generation of the range extender, the preset range extender output power curve, and the preset engine fuel efficiency characteristic curve, an engine operating condition point corresponding to the current required power generation of the range extender by a search or interpolation algorithm, wherein the engine operating condition point is a speed and torque at which the engine meets a predetermined fuel efficiency standard while providing the current required power generation of the range extender; and the eleventh determination module is configured to determine the speed as the generator target speed and the torque as the engine target torque, wherein the preset range extender output power curve and the preset engine fuel efficiency characteristic curve are obtained through bench testing during the engine development phase and stored in the vehicle control system, and is configured to determine the engine operating parameters according to the current required power generation of the range extender.

[0106] Through the above process, the extended-range hybrid loader achieves highly refined energy management, ensuring that the engine operates at its most economical operating point while meeting power requirements. This not only improves overall energy efficiency but also extends the engine's service life by reducing uneconomical operating time. Furthermore, by precisely controlling the operating parameters of the generator and engine, the battery's charge and discharge cycles are reduced, extending its service life and further improving the reliability and economic efficiency of the entire system. Overall, intelligent control enables efficient, economical, and environmentally friendly operation of the loader in complex operating environments.

[0107] In some further embodiments of the present application, the control unit includes a control module for controlling the shutdown or start-up of the engine based on the current operating mode of the extended-range hybrid loader, the engine target torque and the generator target speed, or controlling the engine operation according to the engine target torque and the generator operation according to the generator target speed based on the current operating mode of the extended-range hybrid loader.

[0108] Through a dynamic and precise control mechanism for the engine and generator operating status, the range-extended hybrid loader's energy efficiency and response speed are significantly improved, while also extending the service life of key components and reducing emissions. By flexibly adjusting engine start and stop, precisely controlling its operating torque, and appropriately setting the generator's target speed, the system seamlessly transitions the loader between vehicle operation mode, vehicle operation standby mode, and vehicle shutdown standby mode, ensuring the engine always operates under optimal conditions and the generator provides the required electrical energy without excessive consumption. This achieves refined energy management while meeting operational needs, reducing unnecessary energy waste and lowering operating costs. This strategy also reduces the engine's operating time in uneconomic conditions, effectively extending the service life of the engine and battery.

[0109] The power generation control device for the extended-range hybrid loader includes a processor and memory. The monitoring unit, determination unit, control unit, etc. are all stored as program units in the memory, and the processor executes the program units stored in the memory to implement the corresponding functions. All of the above modules are located in the same processor; alternatively, the above modules can be located in different processors in any combination.

[0110] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0111] The embodiment of the present invention provides a power system of a range-extended hybrid loader. The power generation control method of the range-extended hybrid loader is applied to the power system of the range-extended hybrid loader. Figure 9 As shown, it includes an engine, an electronic control unit (ECU), a generator, a motor controller (MCU), a high-voltage power distribution unit (PDU), a power battery, a drive motor, a hydraulic motor, a gearbox, a hydraulic pump, and a vehicle control unit (VCU).

[0112] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program. When the program is executed, the device where the computer-readable storage medium is located is controlled to execute the power generation control method of the extended-range hybrid loader.

[0113] An embodiment of the present invention provides an electronic device comprising a processor, memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the steps of the above-described method for controlling power generation of a range-extended hybrid loader are implemented. The device herein may be a server, a PC, a PAD, a mobile phone, or the like.

[0114] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the steps of the power generation control method of the above-mentioned extended-range hybrid loader.

[0115] Obviously, those skilled in the art will appreciate that the various modules or steps of the present invention described above can be implemented using a general-purpose computing device, can be centralized on a single computing device, or can be distributed across a network of multiple computing devices. They can be implemented using program code executable by the computing device, and thus, can be stored in a storage device and executed by the computing device. In some cases, the steps shown or described herein can be performed in a different order than that shown, or can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0116] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0117] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0119] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0120] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0121] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0122] Computer-readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0123] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0124] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A power generation control method for a range-extended hybrid loader, characterized in that: include: monitoring real-time operating parameters and driving operation information of the extended-range hybrid loader, and determining a current operating mode of the extended-range hybrid loader based on the real-time operating parameters and the driving operation information, wherein the current operating mode of the extended-range hybrid loader is a whole vehicle operation mode, a whole vehicle operation waiting mode, or a whole vehicle stop waiting mode, and the driving operation information includes an accelerator pedal opening and a hydraulic joystick displacement; Determining a current operating mode of the range extender based on the current operating mode of the range extender hybrid loader and the state of charge of the power battery, and determining a current required generated power of the range extender based on the current operating mode of the range extender, the required power of the range extender hybrid loader, and the state of charge of the power battery, wherein the required power of the range extender hybrid loader is obtained based on the current operating mode of the range extender hybrid loader; The target speed of the generator and the target torque of the engine are determined based on the current required power generation power of the range extender, a preset range extender output power curve, and a preset engine fuel efficiency characteristic curve, and the operating states of the engine and the generator are controlled based on the current operating mode of the range-extended hybrid loader, the target speed of the generator, and the target torque of the engine.

2. The method according to claim 1, characterized in that Monitoring real-time operating parameters and driving operation information of the range-extended hybrid loader, and determining a current operating mode of the range-extended hybrid loader based on the real-time operating parameters and the driving operation information, including: monitoring the real-time operating parameters and the driving operation information of the extended-range hybrid loader to determine a first duration of no action signal for the throttle opening of the extended-range hybrid loader and / or a second duration of no action signal for the operating handle of the hydraulic working device; When the first duration and / or the second duration is less than or equal to a first time threshold, determining that the current operating mode of the extended-range hybrid loader is the vehicle operation mode; When the first duration and / or the second duration is greater than the first time threshold and less than the second time threshold, determining that the current operating mode of the extended-range hybrid loader is the vehicle operation waiting mode; When the first duration and / or the second duration is greater than or equal to the second time threshold, determining that the current operating mode of the extended-range hybrid loader is the vehicle stop waiting mode, The first time threshold is smaller than the second time threshold.

3. The method according to claim 1, characterized in that Determining the current operating mode of the range extender according to the current operating mode of the range-extended hybrid loader and the state of charge of the power battery includes: When the current operating mode of the range-extended hybrid loader is the whole vehicle operation mode, if the state of charge of the power battery is less than or equal to a first state of charge threshold, it is determined that the current operating mode of the range extender is the maximum fixed-point power generation mode; if the state of charge of the power battery is greater than or equal to a second state of charge threshold, it is determined that the current operating mode of the range extender is the standby mode; if the state of charge of the power battery is greater than the first state of charge threshold and less than the second state of charge threshold, it is determined that the current operating mode of the range extender is the power follower mode; When the current operating mode of the range-extended hybrid loader is the vehicle operation waiting mode, if the state of charge of the power battery is less than or equal to the first state of charge threshold, it is determined that the current operating mode of the range extender is the optimal fixed-point power generation mode; if the state of charge of the power battery is greater than the first state of charge threshold, it is determined that the current operating mode of the range extender is the standby mode; When the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode, determining that the current operating mode of the range extender is the stop mode, The first state of charge threshold is smaller than the second state of charge threshold.

4. The method according to claim 1, wherein Determining the current required power generation power of the range extender based on the current operating mode of the range extender, the required power of the range-extended hybrid loader, and the state of charge of the power battery, wherein the required power of the range-extended hybrid loader is obtained based on the current operating mode of the range-extended hybrid loader, including: In the case where the current operating mode of the range-extended hybrid loader is the whole vehicle operation mode, if the current operating mode of the range extender is the maximum fixed-point power generation mode, the currently required power generation power of the range extender is determined to be the rated power of the range extender; if the current operating mode of the range extender is the standby mode, the currently required power generation power of the range extender is determined to be zero; if the current operating mode of the range extender is the power following mode, the currently required power generation power of the range extender is determined by interpolation of the power generation power MAP of the range extender power following mode, wherein the abscissa of the power generation power MAP of the range extender power following mode is the required power of the range-extended hybrid loader, and the ordinate of the power generation power MAP of the range extender power following mode is the currently required power generation power of the range extender; In a case where the current operating mode of the range-extended hybrid loader is the vehicle operation waiting mode, if the current operating mode of the range extender is the optimal fixed-point power generation mode, determining that the current required power generation power of the range extender is the range extender output power corresponding to the engine operating at the high efficiency point, the high efficiency point being obtained based on a preset fuel consumption rate MAP and a preset power increase efficiency MAP; if the current operating mode of the range extender is the standby mode, determining that the current required power generation power of the range extender is zero; When the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode, it is determined that the current required power generation power of the range extender is zero.

5. The method according to claim 1, wherein Determining a generator target speed and an engine target torque based on the current required power generation power of the range extender, a preset range extender output power curve, and a preset engine fuel efficiency characteristic curve, including: According to the current required power generation power of the range extender, based on the preset range extender output power curve and the preset engine fuel efficiency characteristic curve, determining the engine operating condition point corresponding to the current required power generation power of the range extender by a search or interpolation algorithm, wherein the engine operating condition point is the speed and torque of the engine that meets a predetermined fuel efficiency standard while providing the current required power generation power of the range extender; The rotation speed is determined as the generator target rotation speed, and the torque is determined as the engine target torque, The preset range extender output electric power curve and the preset engine fuel efficiency characteristic curve are obtained through bench testing during the engine development phase and stored in the vehicle control system for determining the engine operating parameters based on the current required power generation of the range extender.

6. The method according to claim 4, characterized in that If the current operating mode of the range extender is the maximum fixed-point power generation mode, after determining that the current required power generation power of the range extender is the rated power of the range extender, the method further includes: detecting whether the current operating mode of the range-extended hybrid loader is the vehicle operation mode; If the current working mode of the extended-range hybrid loader is not the vehicle operation mode, the current working mode of the extended-range hybrid loader enters the vehicle operation waiting mode; If the current operating mode of the extended-range hybrid loader is the whole-vehicle operation mode, it is detected whether the state of charge of the power battery is greater than or equal to a third state of charge threshold value; if the state of charge of the power battery is greater than or equal to the third state of charge threshold value, the current operating mode of the range extender enters the power follow mode; if the state of charge of the power battery is less than the third state of charge threshold value, the current operating mode of the range extender remains in the maximum fixed-point power generation mode.

7. The method according to claim 4, characterized in that When the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode, after determining that the current required power generation power of the range extender is zero, the method further includes: detecting whether the current operating mode of the range-extended hybrid loader is the vehicle stop waiting mode; If the current operating mode of the range-extended hybrid loader is the vehicle shutdown waiting mode, the current operating mode of the range extender is the shutdown mode; If the current operating mode of the range-extended hybrid loader is not the vehicle stop waiting mode, the range extender generator reversely starts the engine, and the current operating mode of the range-extended hybrid loader enters the vehicle operation mode.

8. The method according to claim 1, characterized in that Controlling the operating states of the engine and the generator according to the current operating mode of the range-extended hybrid loader, the generator target speed, and the engine target torque includes: Based on the current operating mode of the extended-range hybrid loader, the engine target torque and the generator target speed, the engine is controlled to stop or start, or based on the current operating mode of the extended-range hybrid loader, the engine operation is controlled according to the engine target torque and the generator operation is controlled according to the generator target speed.

9. A power generation control device for a range-extended hybrid loader, characterized in that: include: a monitoring unit configured to monitor real-time operating parameters and driving operation information of the range-extended hybrid loader, and determine a current operating mode of the range-extended hybrid loader based on the real-time operating parameters and the driving operation information, wherein the current operating mode of the range-extended hybrid loader is a vehicle operation mode, a vehicle operation waiting mode, or a vehicle stop waiting mode, and the driving operation information includes an accelerator pedal opening and a hydraulic joystick displacement; a determining unit, configured to determine a current operating mode of the range extender according to the current operating mode of the range-extended hybrid loader and the state of charge of the power battery, and determine a current required generated power of the range extender based on the current operating mode of the range extender, the required power of the range-extended hybrid loader, and the state of charge of the power battery, wherein the required power of the range-extended hybrid loader is obtained based on the current operating mode of the range-extended hybrid loader; a control unit for determining a generator target speed and an engine target torque based on the current required power generation power of the range extender, a preset range extender output power curve, and a preset engine fuel efficiency characteristic curve, and controlling the operating states of the engine and the generator based on the current operating mode of the range-extended hybrid loader, the generator target speed, and the engine target torque.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the power generation control method of the extended-range hybrid loader according to any one of claims 1 to 8.

Images