Engineering machinery control method, device, controller and system and engineering machinery

Abstract

The invention relates to an engineering machinery control method, device, controller and system and engineering machinery. The method comprises the following steps: detecting a high-power mode triggering instruction, and verifying whether a starting condition of a high-power mode is met or not; starting the high-power mode of the engineering machinery in response to the condition that the starting condition of the high-power mode is met; in the high-power mode, the maximum output torque of the driving motor is the peak external characteristic torque of the driving motor, and the maximum output power of the driving motor is the smaller value of the peak power of the driving motor and the combined maximum power supply power of the power generation system and the power battery; the power generation system comprises a generator and an engine. By the adoption of the method, it can be guaranteed that the driving system of the engineering machine can exert the maximum driving performance so as to meet the power requirements of the engineering machine under the working conditions of short slope punching, high obstacle crossing and the like.

Description

Technical Field

[0001] This application relates to the field of engineering machinery control, and in particular to an engineering machinery control method, device, controller, system, and engineering machinery. Background Technology

[0002] New energy construction machinery requires high power output for short periods of time in special working conditions such as "short slope climbing" and "high obstacle crossing". However, due to the influence of battery and motor characteristics on the drive system, it cannot fully perform at its maximum capacity in many cases. Factors such as high or low battery temperature, low battery charge, and motor overheating can all affect the drive performance of the construction machinery drive system, resulting in insufficient power.

[0003] Currently, for new energy construction machinery, there are two main methods to achieve high drive speed for short periods: One is to drive the wheel ends through multi-motor coupling, where the generator / motor and drive motor jointly drive the axle rotation. The other method is to switch the pure electric mode in the hybrid system to hybrid mode, and then use the engine and motor to provide driving force for the hybrid construction vehicle. In this case, an electronically controlled clutch is required for machinery control.

[0004] However, both of these solutions require an additional power source or complex transmission structure at the drive wheel end, resulting in poor compatibility and making them unsuitable for power systems driven by a single motor. Furthermore, simply increasing the drive-end power is insufficient to intelligently and efficiently unleash the maximum required power performance under specific operating conditions. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, device, controller, system, and engineering machinery for controlling engineering machinery in response to the above-mentioned technical problems.

[0006] In a first aspect, this application provides a control method for construction machinery, wherein the construction machinery is equipped with a range extender system, the range extender system comprising a drive motor, a power battery, a generator, and an engine; the method includes: A high-power mode trigger command was detected. The activation conditions for high-power mode were verified. In response to the fulfillment of the start-up conditions for high-power mode, the high-power mode of the engineering machinery is activated; In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes the generator and the engine.

[0007] In one embodiment, the method further includes: The maximum power supply of the power generation system is determined based on the peak power of the generator, the peak power of the engine, and the system efficiency of the generator. The combined maximum power supply of the power generation system and the power battery is determined based on the maximum power supply of the power generation system, the maximum allowable discharge power of the power battery, and the system efficiency of the drive motor.

[0008] In one embodiment, the method further includes: According to the formula:

[0009] in, This represents the maximum power output of the power generation system. The peak power of the generator. This represents the peak power of the engine. The system efficiency of the generator; Determine the maximum power supply of the power generation system; According to the formula:

[0010] in, This represents the maximum output power of the drive motor. The peak power of the drive motor is... This refers to the maximum permissible discharge power of the power battery. The system efficiency of the drive motor; Determine the maximum output power of the drive motor.

[0011] In one embodiment, the activation conditions include: The engine operates at the target speed corresponding to its maximum power generation. The SOC of the power battery is within a preset target SOC range; The cooling systems of the power battery, the engine, the generator, and the drive motor are all in a state of maximum cooling. The temperatures of the engine, the drive motor, and the generator are all within a preset target temperature range.

[0012] In one embodiment, the method further includes: If the startup conditions for high-power mode are not met, then perform startup preparation for high-power mode. If the startup preparation is completed within a preset time, the step of verifying whether the startup conditions for high-power mode are met is re-executed. If the startup preparation is not completed within the preset time, a corresponding trigger failure signal will be fed back.

[0013] In one embodiment, the preparation for activating the high-power mode includes: The engine is adjusted to operate at the target speed corresponding to its maximum power generation. In response to the SOC of the power battery being lower than the lower limit of the target SOC range, the generator is controlled to increase its power generation until the SOC of the power battery is within the target SOC range; In response to the fact that the temperature of the power battery is not within the target temperature range, the heating system or cooling system of the power battery is activated to heat up or cool down the power battery until the temperature of the power battery is within the target temperature range; Adjust the cooling systems of the engine, the generator, and the drive motor to their maximum cooling capacity.

[0014] Secondly, this application also provides a control device for construction machinery, wherein the construction machinery is equipped with a range extender system, the range extender system including a drive motor, a power battery, a generator, and an engine; the device includes: The verification module is used to detect the high-power mode trigger command and verify whether the start conditions of the high-power mode are met. A response module is used to activate the high-power mode of the construction machinery in response to the fulfillment of the activation conditions for the high-power mode. In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes the generator and the engine.

[0015] Thirdly, embodiments of this application provide a controller, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0016] Fourthly, this application provides a construction machinery control system, including the aforementioned controller and a high-power mode triggering device, an engine control unit, a generator control unit, a drive motor control unit, a battery management system, and a thermal management system, all of which are communicatively connected to the controller. The controller is used to detect the high-power mode trigger command generated by the high-power mode triggering device, and to verify whether the start-up conditions of the high-power mode are met by acquiring feedback signals from the engine control unit, the battery management system, the generator control unit, the drive motor control unit, and the thermal management system. In response to the fulfillment of the start-up conditions for high-power mode, the high-power mode of the engineering machinery is activated; In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes the generator and the engine.

[0017] Fifthly, embodiments of this application provide an engineering machinery, including the aforementioned controller or the aforementioned engineering machinery control system.

[0018] One of the above technical solutions has the following advantages or beneficial effects: This solution solves the problem of short-term high power demand in a single-motor drive system through dynamic power coordination management of the range extender system for construction machinery. Specifically, when the high-power mode is triggered, the system can intelligently integrate the power supply capabilities of the drive motor, power battery, generator, and engine, raising the upper limit of the drive motor's output to the smaller of its own peak power and the combined maximum power supply of the generator system and power battery. This breaks through the power limitation of a single power source and eliminates the need for additional wheel-end power sources. This control method for construction machinery is a software control strategy based on the existing range extender architecture. It maintains the structural simplicity of a single-motor drive while realizing intelligent power distribution through multi-energy coupling, ensuring that the drive system can achieve maximum drive performance to meet the power requirements of construction machinery in conditions such as "climbing short slopes" and "crossing obstacles." Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating a method for controlling engineering machinery in one embodiment; Figure 2 This is a flowchart illustrating the engineering machinery control method in another embodiment; Figure 3 This is a structural block diagram of the engineering machinery control device in one embodiment; Figure 4 This is a structural block diagram of a construction machinery control system in one embodiment. Detailed Implementation

[0020] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] In one embodiment, such as Figure 1 As shown, a control method for construction machinery is provided. The construction machinery can be understood as specialized mechanical equipment used in heavy-duty operation scenarios such as engineering construction, mining, agricultural and forestry operations, and port loading and unloading. It can mainly include excavators, loaders, bulldozers, cranes, road rollers, forklifts, concrete pump trucks, etc. They usually require high torque and high power output to cope with complex working conditions (such as climbing, heavy load, crushing, etc.). Traditional construction machinery relies on diesel engine drive, while new energy construction machinery adopts electric or hybrid systems, such as pure electric drive, range extender, fuel cell, etc.

[0023] Range-extended construction machinery is equipped with a range-extending system, which includes a drive motor, a power battery, a generator, and an engine. In this system, the engine does not directly drive the machinery but instead powers the generator. The generator's output, along with the power battery, supplies power to the drive motor, making it the machinery's sole power source. The power battery stores energy and, when high power demand is required, works with the generator to supply power. When the battery is low or more power is needed, the engine starts and powers the generator. The system can intelligently optimize the power distribution among the engine, generator, and battery in real time, ensuring the drive motor always receives optimal energy supply. This extends the battery's lifespan and meets short-term high-power demands. The following steps are used as an example of applying this construction machinery control method to the vehicle control unit (VCU) or other components in construction machinery: S102, a high-power mode trigger command is detected, and the start conditions of high-power mode are verified.

[0024] The high-power mode trigger command can be understood as a command used to activate the high-power mode. Specifically, this can be generated by the operator initiating a request via physical buttons, a touchscreen, or a remote signal on the construction machinery. High-power mode is understood as a working mode for construction machinery that requires higher performance output, such as during heavy-duty operations or hill climbing. Furthermore, the operator can trigger it via a mode switching button or handle in the cab, receive commands from the remote control system via the CAN bus, or automatically detect operating conditions using sensors, such as sudden load increases or maximum throttle pedal opening. Other triggering methods are also possible; no limitations are set here.

[0025] To verify whether the high-power mode activation conditions are met, the VCU can interact in real time with existing equipment in the engineering machinery, such as the Battery Management System (BMS) and Engine Control Unit, to obtain corresponding data for judgment. The specific interaction equipment depends on the preset high-power mode activation conditions. For example, if the high-power mode activation conditions include whether the engine coolant temperature and oil pressure are normal, then the VCU needs to interact with the corresponding temperature sensor or oil pressure sensor.

[0026] The starting conditions for high-power mode need to take into account factors such as the safety of the entire construction machinery system, energy supply capacity, and equipment reliability to ensure that the construction machinery can operate stably in this mode without damaging key components. Specific starting conditions are not limited here.

[0027] S104, in response to the satisfaction of the start-up conditions of the high-power mode, the high-power mode of the construction machinery is started; in this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller value between its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes a generator and an engine.

[0028] In this embodiment of the application, activating the high-power mode of the construction machinery means that the controller will release or temporarily relax the power limit in the normal working mode, allowing the drive motor, generator, engine, and power battery to output in coordination at maximum capacity according to the strategy.

[0029] Specifically, the maximum output torque of the drive motor is its peak external characteristic torque, which is the maximum torque that the drive motor can achieve under short-term overload conditions. This value can be determined by the design of the drive motor, and the drive motor can operate based on this torque for several seconds to several minutes.

[0030] The combined maximum power output of the power generation system and the power battery can be understood as the sum of the maximum power output of the power generation system and the maximum allowable discharge power of the power battery. The maximum power output of the power generation system can be determined based on the peak power of the engine and generator.

[0031] In the above embodiments of this application, the executing entity can be the vehicle controller (VCU). Of course, it can also be selected and changed to any other control unit or a cluster of multiple control units, as long as it can communicate or interact with relevant parties.

[0032] In the above-described engineering machinery control method, the problem of short-term high power demand in a single-motor drive system is solved through dynamic power coordination management of the engineering machinery range extender system. Specifically, when the high-power mode is triggered, the system can intelligently integrate the power supply capabilities of the drive motor, power battery, generator, and engine, raising the upper limit of the drive motor output to the smaller of its own peak power and the combined maximum power supply of the generator system and power battery. This overcomes the power limitation of a single power source and eliminates the need for additional wheel-end power sources. This engineering machinery control method is a software control strategy based on the existing range extender architecture. It maintains the structural simplicity of a single-motor drive while realizing intelligent power allocation through multi-energy coupling, ensuring that the drive system can achieve maximum drive performance to meet the power requirements of engineering machinery in conditions such as "climbing short slopes" and "crossing obstacles."

[0033] In one embodiment, the engineering machinery control method further includes: determining the maximum power supply of the power generation system based on the peak power of the generator, the peak power of the engine, and the system efficiency of the generator; The combined maximum power supply of the power generation system and the power battery is determined based on the maximum power supply of the power generation system, the maximum allowable discharge power of the power battery, and the system efficiency of the drive motor.

[0034] In a further embodiment, the engineering machinery control method further includes: according to the formula:

[0035] in, This is the maximum power output of the power generation system. This represents the peak power of the generator. This represents the engine's peak power. The system efficiency of the generator; Determine the maximum power output of the power generation system; According to the formula:

[0036] in, This is the maximum output power of the drive motor. This represents the peak power of the drive motor. This refers to the maximum permissible discharge power of the power battery. For the system efficiency of the drive motor; Determine the maximum output power of the drive motor.

[0037] In one embodiment, the above-mentioned start-up conditions may include: the engine is running at the target speed corresponding to the maximum power generation; the SOC of the power battery is within a preset target SOC range; the cooling systems of the power battery, engine, generator, and drive motor are all in maximum cooling state; and the temperatures of the engine, drive motor, and generator are all within a preset target temperature range.

[0038] In this embodiment, the target speed can be understood as a specific, pre-calibrated speed range within which the generator driven by the engine can output its maximum power. This maximum power output determines the upper limit of power that the range extender system can provide. By setting this starting condition, it can be ensured that the generator can provide the maximum power output allowed by the system design. If the engine can reach the target speed in advance, the lag in speed increase can be eliminated, allowing the generator to instantly enter full-power generation mode.

[0039] The State of Charge (SOC) of a power battery refers to its current state of charge. A target SOC range can be understood as a specific, pre-defined SOC interval. When the power demand of the drive motor momentarily exceeds the generator's maximum power, the power battery needs to rapidly release a large amount of electrical energy for replenishment. Therefore, the target SOC interval should be set to ensure that the power battery has the highest allowable discharge power and the lowest internal resistance within this range, thereby enabling it to provide the strongest instantaneous discharge capability. By setting this starting condition, it is ensured that the power battery can support the drive motor at the system's maximum allowable power, while preventing the battery from undergoing high-power charging and discharging under extreme SOC conditions. This helps extend the power battery's lifespan and reduce safety risks.

[0040] The cooling systems of the power battery, engine, generator, and drive motor are all in maximum cooling mode. This means that the cooling systems providing heat dissipation for the power battery, engine, generator, and drive motor are all activated and operating at their highest cooling capacity. For example, in liquid cooling or air cooling systems, the coolant flow rate is at maximum, or the fan speed in an air cooling system is at maximum. In high-power mode, all critical components will operate under extreme or near-extreme loads, generating enormous heat. The cooling system is crucial for ensuring that these critical components do not overheat, experience performance degradation, or suffer damage. By proactively setting the cooling system to maximum cooling mode in advance, it prevents the impending high heat load, rather than passively responding after the temperature rises. This activation condition helps minimize the risk of the system automatically reducing power output or shutting down completely due to overheating of critical components, thus ensuring the continuity and stability of high-power mode and improving the reliability and lifespan of critical components.

[0041] The temperatures of the engine, drive motor, and generator are all within preset target temperature ranges. This can be understood as the temperatures of key components such as the engine body, drive motor windings or magnets, and generator windings or magnets being within their respective preset safe and optimal performance temperature ranges. By setting target temperature ranges, the efficiency, output capacity, and combustion state of the engine, drive motor, and generator can be ensured to be at or near-optimal levels. At the same time, it can prevent components from forcibly entering high-power mode under excessively cold or hot conditions, which could cause additional wear, efficiency loss, or even mechanical or electrical malfunctions.

[0042] The above-mentioned high-power mode start-up conditions can effectively prevent dangerous situations such as overload, overheating, over-discharge, and overcharging of various components in high-power mode, and protect the safe operation and lifespan of each component to the greatest extent. At the same time, by ensuring that the engine is at the optimal power generation point, the battery is in the optimal discharge range, the cooling system is at full load standby, and each component is at the optimal operating temperature, the necessary conditions are also created for the drive motor to truly and continuously output its peak external characteristic torque and power.

[0043] In one embodiment, the engineering machinery control method further includes: if the start-up conditions of the high-power mode are not met, then performing start-up preparation for the high-power mode; in response to the start-up preparation being completed within a preset time, re-executing the step of verifying whether the start-up conditions of the high-power mode are met; and in response to the start-up preparation not being completed within the preset time, feeding back a corresponding trigger failure signal.

[0044] The startup preparation for high-power mode can be understood as the steps that enable the startup conditions of high-power mode to be met. Specifically, the startup preparation for high-power mode can be only for the conditions that are not currently met in the startup conditions of high-power mode. Of course, it can also be to check each startup condition in real time and prepare accordingly.

[0045] In one embodiment, the high-power mode startup preparation includes: adjusting the engine to operate at the target speed corresponding to the maximum power generation; in response to the power battery's SOC being lower than the lower limit of the target SOC range, controlling the generator to increase the power generation until the power battery's SOC is within the target SOC range; in response to the power battery's temperature not being within the target temperature range, activating the power battery's heating or cooling system to heat or cool the power battery until the power battery's temperature is within the target temperature range; and adjusting the cooling systems of the engine, generator, and drive motor to their maximum cooling capacity.

[0046] In a specific embodiment, such as Figure 2As shown, after detecting the driver's intention to switch to high-power mode, the system can prepare for high-power mode, which may include the following: the engine speed is increased to the point where it can generate maximum power; when the power battery SOC is lower than the SOC required to trigger high-power mode, the generator power is increased to charge the battery; when the battery temperature is lower than the temperature required to trigger high-power mode, the battery heating system is activated to heat the battery; when the battery temperature is higher than the temperature required to trigger high-power mode, the battery cooling system is activated to cool the battery; the cooling systems of the engine system, generator system, and drive motor system are activated, and the speed is increased to the maximum fan speed and water pump speed to achieve the state of maximum cooling capacity.

[0047] The system can enter high-power mode when the following conditions are met: the engine is operating stably at the speed point where it can generate maximum power; the power battery's SOC is within the range where high-power mode can be operated; the cooling systems of the power battery system, engine system, generator system, and drive motor system are operating at their maximum cooling capacity; and the temperatures of the engine, drive motor system, and generator system are all within the temperature range where high-power mode can be operated.

[0048] If the system still does not meet the conditions for entering high-power mode after the driver's intention to trigger the mode, the system will no longer perform high-power mode preparation and will switch back to the working mode before the trigger.

[0049] After the system enters high-power mode, it will notify the driver through the instruments on the construction machinery or other means that the machinery is in a state where high-power operation is permitted. When the driver depresses the accelerator pedal to its maximum opening, the machinery can be driven at the maximum operating power mentioned above. After entering high-power mode, unless the driver manually requests to exit the mode, the high-power mode can be exited manually if the following conditions are triggered: the state of charge (SOC) of the power battery exceeds the SOC range permitted for high-power mode operation; or the temperature of any one of the power battery system, engine, drive motor system, or generator system exceeds the temperature range for high-power mode operation.

[0050] This application proposes a control method for engineering machinery that simultaneously supplies power through a generator system and a power battery, and allows the drive motor to operate under conditions exceeding its rated torque, thereby providing short-term high power for vehicle operation. Specific beneficial effects include: 1. This application proposes a method for distinguishing between normal driving mode and high-power mode for range extender systems with small battery capacity. This method ensures that the drive system can achieve maximum driving performance to meet the power requirements of construction machinery in working conditions such as "short slope climbing" and "high obstacle crossing".

[0051] 2. The engineering machinery control method provided in this application can actively prepare conditions for high-power mode, including battery power, system temperature, and cooling system preparation.

[0052] 3. Although this application only illustrates a range extender system configuration, it is actually applicable to small-capacity battery range extender systems with multi-motor drive. The engineering machinery control method proposed in this application has a wide range of applications and high compatibility.

[0053] It should be understood that, for the foregoing method embodiments, although the steps in the flowcharts are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the method embodiments may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0054] Based on the same inventive concept, this application also provides an engineering machinery control device for implementing the above-mentioned engineering machinery control method. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more engineering machinery control device embodiments provided below can be found in the limitations of the engineering machinery control method described above, and will not be repeated here.

[0055] In one embodiment, such as Figure 3 As shown, a control device 300 for construction machinery is provided. The construction machinery is equipped with a range extender system, which includes a drive motor, a power battery, a generator, and an engine. It includes a verification module 301 and a response module 302, wherein: The verification module 301 is used to detect the high-power mode trigger command and verify whether the start conditions of the high-power mode are met. The response module 302 is used to start the high-power mode of the construction machinery in response to the satisfaction of the start-up conditions of the high-power mode; in the high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller value between its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes a generator and an engine.

[0056] In one embodiment, the response module 302 is further configured to determine the maximum power supply of the power generation system based on the peak power of the generator, the peak power of the engine, and the system efficiency of the generator. The combined maximum power supply of the power generation system and the power battery is determined based on the maximum power supply of the power generation system, the maximum allowable discharge power of the power battery, and the system efficiency of the drive motor.

[0057] In one embodiment, the response module 302 is further configured to, according to the formula:

[0058] in, This is the maximum power output of the power generation system. This represents the peak power of the generator. This represents the engine's peak power. The system efficiency of the generator; Determine the maximum power output of the power generation system; According to the formula:

[0059] in, This is the maximum output power of the drive motor. This represents the peak power of the drive motor. This refers to the maximum permissible discharge power of the power battery. For the system efficiency of the drive motor; Determine the maximum output power of the drive motor.

[0060] In one embodiment, the start-up conditions include: the engine is running at the target speed corresponding to the maximum power generation; the state of charge (SOC) of the power battery is within a preset target SOC range; the cooling systems of the power battery, engine, generator, and drive motor are all in maximum cooling state; and the temperatures of the engine, drive motor, and generator are all within a preset target temperature range.

[0061] In one embodiment, the engineering machinery control device 300 further includes: a preparation module, configured to perform high-power mode start-up preparation if the start-up conditions of the high-power mode are not met; re-execute the step of verifying whether the start-up conditions of the high-power mode are met in response to the start-up preparation being completed within a preset time; and feed back a corresponding trigger failure signal in response to the start-up preparation not being completed within the preset time.

[0062] In one embodiment, the preparation module is specifically used to adjust the engine to operate at the target speed corresponding to the maximum power generation; in response to the power battery's SOC being lower than the lower limit of the target SOC range, control the generator to increase the power generation until the power battery's SOC is within the target SOC range; in response to the power battery's temperature not being within the target temperature range, start the power battery's heating or cooling system to heat or cool the power battery until the power battery's temperature is within the target temperature range; and adjust the cooling systems of the engine, generator, and drive motor to their maximum cooling capacity.

[0063] Specific limitations regarding the control devices for construction machinery can be found in the limitations on the control methods for construction machinery described above, and will not be repeated here. Each module in the aforementioned control device for construction machinery can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0064] Furthermore, in the above-described implementation of the engineering machinery control device, the logical division of each program module is merely illustrative. In actual applications, the functions described above can be assigned to different program modules as needed, for example, for the sake of corresponding hardware configuration requirements or the convenience of software implementation. In other words, the internal structure of the engineering machinery control device can be divided into different program modules to complete all or part of the functions described above.

[0065] In one embodiment, a controller is provided, comprising a processor, memory, input / output interfaces, and a communication interface. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface is connected to the system bus via the input / output interfaces. The processor provides computational and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for controlling engineering machinery.

[0066] In one embodiment, an engineering machinery control system is provided, such as Figure 4As shown, the system includes the aforementioned controller (VCU) and, respectively, a high-power mode triggering device, an engine control unit (MCU corresponding to the engine, existing configuration, not shown in the figure), a generator control unit (MCU corresponding to the generator), a drive motor control unit (MCU corresponding to the drive motor), a battery management system (BMS), and a thermal management system, all of which are communicatively connected to the controller. The controller detects the high-power mode triggering command generated by the high-power mode triggering device and verifies whether the high-power mode activation conditions are met by acquiring feedback signals from the engine control unit, battery management system, generator control unit, drive motor control unit, and thermal management system. In response to the high-power mode activation conditions being met, the high-power mode of the construction machinery is activated. In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supplied by the power generation system and the power battery. The power generation system includes a generator and an engine.

[0067] In one embodiment, an engineering machine is provided, which includes the controller or the engineering machine control system described above.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] The terms “comprising” and “having”, and any variations thereof, in the embodiments herein are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or (module) units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0070] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A control method for engineering machinery, characterized in that, The construction machinery is equipped with a range extender system, which includes a drive motor, a power battery, a generator, and an engine; the method includes: A high-power mode trigger command was detected. The activation conditions for high-power mode were verified. In response to the fulfillment of the start-up conditions for high-power mode, the high-power mode of the engineering machinery is activated; In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes the generator and the engine.

2. The method according to claim 1, characterized in that, The method further includes: The maximum power supply of the power generation system is determined based on the peak power of the generator, the peak power of the engine, and the system efficiency of the generator. The combined maximum power supply of the power generation system and the power battery is determined based on the maximum power supply of the power generation system, the maximum allowable discharge power of the power battery, and the system efficiency of the drive motor.

3. The method according to claim 2, characterized in that, The method further includes: According to the formula: in, This represents the maximum power output of the power generation system. The peak power of the generator. This represents the peak power of the engine. The system efficiency of the generator; Determine the maximum power supply of the power generation system; According to the formula: in, This represents the maximum output power of the drive motor. The peak power of the drive motor is... This refers to the maximum permissible discharge power of the power battery. The system efficiency of the drive motor; Determine the maximum output power of the drive motor.

4. The method according to any one of claims 1 to 3, characterized in that, The activation conditions include: The engine operates at the target speed corresponding to its maximum power generation. The SOC of the power battery is within a preset target SOC range; The cooling systems of the power battery, the engine, the generator, and the drive motor are all in a state of maximum cooling. The temperatures of the engine, the drive motor, and the generator are all within a preset target temperature range.

5. The method according to claim 4, characterized in that, The method further includes: If the startup conditions for high-power mode are not met, then perform startup preparation for high-power mode. If the startup preparation is completed within a preset time, the step of verifying whether the startup conditions for high-power mode are met is re-executed. If the startup preparation is not completed within the preset time, a corresponding trigger failure signal will be fed back.

6. The method according to claim 5, characterized in that, The startup preparation for the high-power mode includes: The engine is adjusted to operate at the target speed corresponding to its maximum power generation. In response to the SOC of the power battery being lower than the lower limit of the target SOC range, the generator is controlled to increase its power generation until the SOC of the power battery is within the target SOC range; In response to the fact that the temperature of the power battery is not within the target temperature range, the heating system or cooling system of the power battery is activated to heat up or cool down the power battery until the temperature of the power battery is within the target temperature range; Adjust the cooling systems of the engine, the generator, and the drive motor to their maximum cooling capacity.

7. A control device for engineering machinery, characterized in that, The construction machinery is equipped with a range extender system, which includes a drive motor, a power battery, a generator, and an engine; the device includes: The verification module is used to detect the high-power mode trigger command and verify whether the start conditions of the high-power mode are met. A response module is used to activate the high-power mode of the construction machinery in response to the fulfillment of the activation conditions for the high-power mode. In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes the generator and the engine.

8. A controller, characterized in that, The method includes a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to implement the steps of the method according to any one of claims 1 to 6.

9. A control system for engineering machinery, characterized in that, Includes the controller as described in claim 8 and a high-power mode triggering device, an engine control unit, a generator control unit, a drive motor control unit, a battery management system, and a thermal management system, all of which are communicatively connected to the controller. The controller is used to detect the high-power mode trigger command generated by the high-power mode triggering device, and to verify whether the start-up conditions of the high-power mode are met by acquiring feedback signals from the engine control unit, the battery management system, the generator control unit, the drive motor control unit, and the thermal management system. In response to the fulfillment of the start-up conditions for high-power mode, the high-power mode of the engineering machinery is activated; In this high-power mode, the maximum output torque of the drive motor is its peak external characteristic torque, and the maximum output power of the drive motor is the smaller of its own peak power and the combined maximum power supply of the power generation system and the power battery; wherein the power generation system includes the generator and the engine.

10. An engineering machinery, characterized in that, This includes the controller as described in claim 8 or the engineering machinery control system as described in claim 9.

Images