Range extender start-stop control method and device, engineering machinery vehicle and storage medium

Abstract

The application discloses an engine range extender start-stop control method and device, an engineering mechanical vehicle and a storage medium. The engine range extender start-stop control method is applied to an engineering mechanical vehicle matched with an engine range extender hybrid system. The engine range extender hybrid system comprises an engine range extender and a hydraulic device. The engine range extender comprises a generator and an engine. The generator is connected with the hydraulic device. The engine range extender start-stop control method comprises the following steps: when an ignition switch is placed in an ON gear, the vehicle is powered off, and the engine range extender is controlled to stop based on an engine range extender stop instruction; during the engine range extender stop process, a handle position signal is received through a vehicle controller, an actual torque when the engine is in an idle state is obtained, and the engine is controlled to stop according to the handle position signal and the actual torque; when the ignition switch is placed in the ON gear, the vehicle is powered on again, and the engine range extender is controlled to start based on an engine range extender start instruction; during the engine range extender start process, a starting current of a starter is obtained, and whether the engine is started is determined according to the starting current.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery and vehicle technology, and in particular to a range extender start-stop control method, device, engineering machinery and vehicle, and storage medium. Background Technology

[0002] Construction machinery is an important component of the equipment manufacturing industry. Generally speaking, construction machinery refers to all mechanical equipment necessary for comprehensive mechanized construction in earthwork, road construction and maintenance, mobile lifting and loading operations, and various building projects. Construction machinery vehicles specifically refer to large machines undertaking heavy-duty operations, common types including excavators, bulldozers, cranes, road rollers, loaders, and concrete mixer trucks. These vehicles are widely used in various construction scenarios, primarily responsible for core operations such as excavation, material handling, ground compaction, and heavy lifting.

[0003] Currently, traditional construction machinery vehicles such as loaders and bulldozers rely on the engine to directly drive hydraulic components to transmit power and perform core operations like loading and unloading. However, for loaders and bulldozers using range-extended hybrid systems, the industry has adopted an integrated design approach to effectively control the cost of the entire system. This involves adding key hydraulic components such as hydraulic pumps to the range-extended hybrid system, giving it a dual function: firstly, generating electricity to support the vehicle's electrical system; and secondly, directly driving the hydraulic components to meet the hydraulic power requirements for loading, unloading, and bulldozing operations.

[0004] However, because the hydraulic components are directly integrated into the range extender, the two form a tight coupling relationship in the powertrain, which brings specific failure risks. Specifically, when hydraulic components experience mechanical jamming, or hydraulic valves fail to return to their neutral position, or even when hydraulic valves fail and cannot close properly, the abnormal state of the hydraulic system will persist even after the engine has stopped. When the vehicle is used again and the operator attempts to start the engine, this abnormality in the hydraulic system will interfere with the starting process. It may cause the starter motor to bear a load beyond its rated range, leading to overcurrent and ultimately causing the starter motor to burn out, or it may result in the alternator dragging the engine to start abnormally. This abnormal starting method, in turn, will damage the hydraulic components. Summary of the Invention

[0005] This invention provides a range extender start-stop control method, device, engineering machinery vehicle, and storage medium to solve the current problem that if hydraulic components are stuck, hydraulic valves fail to return to the neutral position or fail to close, the starter motor may burn out due to overcurrent when the engine is restarted after a shutdown, or the generator may drag the engine to start, thus damaging the hydraulic components.

[0006] According to one aspect of the present invention, a range extender start-stop control method is provided. This method is applied to engineering machinery vehicles equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic device. The range extender includes a generator and an engine, and the generator is connected to the hydraulic device. The range extender start-stop control method includes:

[0007] When the ignition switch is in the ON position, the vehicle power is cut off, and the range extender is shut down based on the range extender shutdown command.

[0008] During the range extender shutdown process, the vehicle controller receives the handle position signal and obtains the actual torque when the engine is idling, and controls the engine to shut down based on the handle position signal and the actual torque.

[0009] When the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on the range extender start command.

[0010] During the start-up process of the range extender, the starting current of the starter motor is obtained, and the engine is started based on the starting current.

[0011] Optionally, the engine can be stopped based on the handle position signal and actual torque, including:

[0012] If the handle position is determined to be in the neutral position based on the handle position signal, then the engine is stopped according to the actual torque.

[0013] If the handle position signal indicates that the handle is not in the neutral position, then the handle position is adjusted to the neutral position, and the engine is stopped based on the actual torque.

[0014] Optionally, engine shutdown can be controlled based on actual torque, including:

[0015] If the difference between the actual torque and the friction torque is greater than or equal to the torque threshold, the engine will be shut down after a fault in the hydraulic valve in the hydraulic system is reported.

[0016] If the difference between the actual torque and the friction torque is less than the torque threshold, the engine will be shut down.

[0017] Optionally, the range extender start-stop control method also includes:

[0018] If the vehicle controller does not receive a handle position signal during the range extender shutdown process, it will override the control to keep the handle position in the neutral position.

[0019] Optionally, after controlling the range extender to start based on the range extender start command, the following steps are also included:

[0020] The unauthorized control handle remains in the neutral position.

[0021] Optionally, determining whether to start the engine based on the starting current includes:

[0022] If the starting current exceeds the current threshold, and the duration of the starting current exceeding the current threshold reaches the set time length, then the engine will stop starting, and a hydraulic valve malfunction in the hydraulic system will be reported.

[0023] If the starting current does not exceed the current threshold, the engine will start.

[0024] Optionally, the range extender start-stop control method also includes:

[0025] If a hydraulic valve malfunction is reported during the range extender shutdown process, the presence of the hydraulic valve malfunction will be checked during the range extender restart process.

[0026] According to another aspect of the present invention, a range extender start-stop control device is provided. This device is applied to an engineering machinery vehicle equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic system. The range extender includes a generator and an engine, and the generator is connected to the hydraulic system. The range extender start-stop control device includes:

[0027] The range extender shutdown module is used to cut off the vehicle power when the ignition switch is in the ON position and to control the range extender to shut down based on the range extender shutdown command.

[0028] The engine shutdown module is used to receive the handle position signal through the vehicle controller and obtain the actual torque when the engine is idling during the range extender shutdown process, and control the engine to shut down according to the handle position signal and the actual torque.

[0029] The range extender restart module is used to power up the vehicle again when the ignition switch is in the ON position, and to control the range extender to start based on the range extender start command.

[0030] The engine start module is used to acquire the starter current of the starter motor during the range extender start-up process and determine whether to start the engine based on the starter current.

[0031] According to another aspect of the present invention, an engineering machinery vehicle is provided, the engineering machinery vehicle including a range-extended hybrid power system, the range-extended hybrid power system including a range extender, a hydraulic device, a drive motor and a power battery, the range extender including a generator and an engine, the generator being connected to the power battery through a generator controller, the hydraulic device being connected to the generator, and the drive motor being connected to the power battery through a drive motor controller.

[0032] Construction machinery vehicles also include:

[0033] At least one processor; and,

[0034] A memory that is communicatively connected to at least one processor; wherein,

[0035] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to execute the range extender start-stop control method of any embodiment of the present invention.

[0036] According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute and implement the range extender start-stop control method of any embodiment of the present invention.

[0037] The technical solution of this invention, a range extender start-stop control method, is applied to engineering machinery vehicles equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic device. The range extender includes a generator and an engine, with the generator connected to the hydraulic device. The range extender start-stop control method includes: cutting off vehicle power when the ignition switch is in the ON position, and controlling the range extender to stop based on a range extender stop command; during the range extender stop process, receiving a handle position signal through the vehicle controller, and acquiring the actual torque of the engine when it is idling, and controlling the engine according to the handle position signal and the actual torque. The system is designed to monitor the position of the operating handle when the range extender is stopped and to determine the risk of hydraulic system failure based on the actual engine torque value during the shutdown process, thus enabling early fault diagnosis. Furthermore, when the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on the range extender start command. During the range extender start process, the starter current is acquired, and the engine start is determined based on the starter current. This ensures that the starter is prioritized for starting based on the fault condition when the range extender starts, and the starter current is used to determine whether the fault still exists during the start process, ensuring that there is no hydraulic failure.

[0038] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart of a range extender start-stop control method provided by an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of a range-extended hybrid power system provided according to an embodiment of the present invention;

[0042] Figure 3 This is a flowchart of a range extender start-stop control method provided by an embodiment of the present invention;

[0043] Figure 4 This is a flowchart of a range extender start-stop control method provided by an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of a range extender start-stop control device according to an embodiment of the present invention;

[0045] Figure 6 This is a structural schematic diagram of an engineering machinery vehicle that implements the range extender start-stop control method of the present invention. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] Figure 1This invention provides a flowchart of a range extender start-stop control method. This embodiment is applicable to identifying and preventing potential hydraulic component failures in engineering machinery vehicles equipped with range-extended hybrid power systems, such as jamming, hydraulic valves not returning to the neutral position, or hydraulic valve failures that prevent closure. This helps prevent damage to the starter motor or hydraulic components. The range extender start-stop control method can be executed by a range extender start-stop control device, which can be implemented in hardware and / or software. This range extender start-stop control device can be configured in various types of engineering machinery vehicles.

[0049] In this embodiment, the range extender start-stop control method is applied to construction machinery vehicles equipped with a range-extended hybrid power system. Figure 2 A schematic diagram of a range-extended hybrid power system is provided for embodiments of the present invention, such as... Figure 2 As shown, the range-extended hybrid system includes a range extender 10, a hydraulic device 8, a drive motor 6, and a power battery 5. The range extender 10 includes a generator 3 and an engine 1. The rotor of the generator 3 is connected to the crankshaft of the engine 1 via a coupling 2. The output end of the rear rotor of the generator 3 is connected to the hydraulic device 8 to take off power. Either the engine 1 or the generator 3 can provide power, which is output through the rotor of the generator 3. The generator 3 is connected to the power battery 5 via a generator controller 4. The drive motor 6 is connected to the power battery 5 via a drive motor controller 7.

[0050] As is known, the hydraulic device 8 contains a hydraulic pump and hydraulic valves. The generator 3 rotor drives the hydraulic pump. When the hydraulic valve opens, pressurized oil is transmitted to the hydraulic device to drive the working device. When the hydraulic valve is in the neutral position, no hydraulic oil drives the working device, and the oil flows directly back to the oil tank. If the hydraulic valve fails and remains open, the working device will be driven whenever the engine 1 is running. When the working device is under heavy load, if the engine 1 is restarted, the resistance will increase, and the starter current will increase significantly.

[0051] Based on the above, such as Figure 1 and Figure 2 As shown, the range extender start-stop control method includes:

[0052] S110: When the ignition switch is in the ON position, the vehicle power is cut off, and the range extender is shut down based on the range extender shutdown command.

[0053] The range extender start-stop control method is applied to construction machinery vehicles. Construction machinery vehicles can be, but are not limited to, agricultural machinery vehicles, construction machinery vehicles, or road traffic vehicles. In this embodiment, optional construction machinery vehicles can be, but are not limited to, loaders, bulldozers, etc. This embodiment does not impose special restrictions on the specific types of construction machinery vehicles.

[0054] Optionally, the vehicle is powered off when the ignition switch is in the ON position. This vehicle is a loader or bulldozer equipped with a range-extended hybrid system. In order to reduce the purchase cost of the assembly, the range-extended hybrid system has a hydraulic device, so the range-extended hybrid system can generate electricity and meet the working needs of the hydraulic device at the same time.

[0055] As is known, when the ignition switch is in the ON position, the vehicle is powered off. That is, after the ignition switch of a vehicle such as a loader or bulldozer is turned to the "power-on ready position", the key will remain in this position. The vehicle completes the initialization of the electrical system and the self-test of each core module, preparing for the subsequent engine start or activation of the high-voltage system.

[0056] The range extender shutdown command is a control command used to switch the range extender from the working or standby state to the safe shutdown state. The range extender shutdown command can be generated by the interaction of signals from the ignition switch, control module (VCU / ECU) and various sensors. This embodiment does not impose special restrictions on its generation method and triggering conditions.

[0057] Specifically, the vehicle is powered off when the ignition switch is in the ON position, and the range extender is shut down based on the range extender shutdown command to ensure safety during the shutdown process and no abnormal system loss.

[0058] S120: During the range extender shutdown process, the vehicle controller receives the handle position signal and obtains the actual torque when the engine is idling, and controls the engine to shut down based on the handle position signal and the actual torque.

[0059] As those skilled in the art will know, the handle being in the middle position is not only compatible with the integrated design of the construction machinery vehicle shown in the embodiments of the present invention, solving the potential starting failure caused by power-hydraulic coupling, but also ensures the stable operation of the construction machinery vehicle from multiple dimensions such as safety, lifespan, and efficiency. It is the default safety gear in the non-operational state during construction machinery operation.

[0060] As is known, the handle of an engineering machinery vehicle can be manually controlled by the vehicle driver. After the vehicle driver makes corresponding control of the handle, a handle position signal is generated. The handle position signal can be transmitted to the vehicle controller through hard wire or CAN bus.

[0061] The actual torque of an engine at idle is a dynamically changing value, not a fixed constant. The actual torque of an engine at idle is very small, just enough to keep the engine running and drive accessories such as the generator.

[0062] Specifically, before the vehicle controller stops the engine, it needs to determine whether the feedback position of the operating handle is in the neutral position. If the handle position signal indicates that the handle is in the neutral position, the engine is stopped according to the actual torque. If the handle position signal indicates that the handle is not in the neutral position, the controller overrides the control to position the handle in the neutral position and stops the engine according to the actual torque.

[0063] Furthermore, if the difference between the actual torque and the friction torque is greater than or equal to the torque threshold, a fault in the hydraulic valve in the hydraulic system is reported, and the engine is shut down; if the difference between the actual torque and the friction torque is less than the torque threshold, the engine is shut down.

[0064] Based on the above embodiments, during the shutdown of the range extender, the vehicle driver may fail to restore the working handle position after powering off. If no manual restoration is performed, i.e., the vehicle controller does not receive the handle position signal, the vehicle controller will identify the current key power-off state and actively set the handle position to the neutral position.

[0065] S130: When the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on the range extender start command.

[0066] In this embodiment, when the ignition switch is in the ON position, the vehicle is powered on again. That is, when the vehicle is not running (the key is turned to the ON position or the start button is pressed without pressing the brake), the vehicle's electronic system wakes up and performs a self-check. As a result, the vehicle exits the hibernation mode, the electronic brain (ECU) is fully powered on, the system diagnosis is completed, and basic oil pressure and voltage are established, ready to receive the command to "start the engine" or "press the accelerator to drive".

[0067] The range extender start command is a control command used to switch the range extender from the safe stop state to the working or standby state. The range extender start command can be generated by the interaction of signals from the ignition switch, the control module (VCU / ECU) and various sensors. This embodiment does not impose any special restrictions on its generation method and triggering conditions.

[0068] Specifically, when the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on the range extender start command, ensuring a safe start-up process and no abnormal system losses.

[0069] S140. During the start-up process of the range extender, the starting current of the starter motor is obtained, and the engine is started based on the starting current.

[0070] In this embodiment, considering the need to ensure the stable operation of construction machinery vehicles from multiple dimensions such as safety, lifespan, and efficiency, after the range extender is started based on the start command, the over-authorization control handle position remains in the neutral position, that is, after the handle position is in the default safe position, the subsequent start operation is then performed.

[0071] The starting current of the starter motor can be detected by, but is not limited to, the shunt at the power battery terminal or the Hall sensor. Based on this starting current, successful starting can be ensured, the circuit can be protected, and energy distribution can be optimized.

[0072] Specifically, during the start-up process of the range extender, if the starting current exceeds the current threshold and the duration of the starting current exceeding the current threshold reaches the set time length, the engine will stop starting and a fault in the hydraulic valve in the hydraulic system will be reported; if the starting current does not exceed the current threshold, the engine will start.

[0073] The current threshold can be selected and set based on the engine starting requirements. The current threshold is the current limit for determining whether the engine can be started. Similarly, the set time length can be selected and set based on the engine starting requirements. The set time length is the time limit for determining whether the engine can be started. In this embodiment, no special restrictions are placed on the specific values ​​of the current threshold and the set time length.

[0074] Based on the above embodiments, if a hydraulic valve repair fault is reported during the range extender shutdown process, it indicates that there was a risk of hydraulic component failure in the vehicle in the early stage. It is necessary to use the starter motor to start and verify whether the hydraulic component failure problem has been resolved. That is, during the restart of the range extender, it is necessary to check whether there is a hydraulic valve repair fault. If there is still a continuous high current when the starter motor starts, it indicates that there is still a problem with the hydraulic component, and the engine is not allowed to start.

[0075] The technical solution of this invention, a range extender start-stop control method, is applied to engineering machinery vehicles equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic device. The range extender includes a generator and an engine. The generator is connected to the hydraulic device. The range extender start-stop control method includes: when the ignition switch is in the ON position, the vehicle is powered off, and the range extender is stopped based on a range extender stop command; during the range extender stop process, a handle position signal is received through the vehicle controller, and the actual torque of the engine when it is idling is obtained, and the engine is stopped based on the handle position signal and the actual torque; when the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on a range extender start command; during the range extender start process, the starting current of the starter motor is obtained, and whether to start the engine is determined based on the starting current. This invention solves the problem that if hydraulic components become stuck, hydraulic valves fail to return to the neutral position or fail to close, the engine may burn out due to overcurrent when restarted after a shutdown, or the generator may drag the engine to start, thus damaging the hydraulic components. It enables early identification and prevention of possible hydraulic component failures, preventing damage to the starter or hydraulic components and ensuring the safe operation of the entire vehicle.

[0076] Based on the same inventive concept Figure 3 This is a flowchart illustrating a range extender start-stop control method provided by an embodiment of the present invention. Based on the previous embodiments, this embodiment monitors the position of the operating handle when the range extender stops and determines the risk of hydraulic device failure based on the actual engine torque during the shutdown process, thus performing fault determination in advance and providing an optional implementation method. Figure 3 As shown, the range extender start-stop control method includes:

[0077] S210: When the ignition switch is in the ON position, the vehicle power is cut off, and the range extender is shut down based on the range extender shutdown command.

[0078] As is known, when the ignition switch is in the ON position, the vehicle is powered off. Before the vehicle controller stops the engine, it needs to determine whether the feedback position of the operating handle is in the neutral position. If not, the unauthorized operating handle is in the neutral position.

[0079] S220: During the range extender shutdown process, the vehicle controller receives the handle position signal and obtains the actual torque when the engine is idling.

[0080] S230. Determine whether the handle position is in the middle position based on the handle position signal. If yes, proceed to step S240; otherwise, proceed to step S231.

[0081] Specifically, if the handle position is determined to be in the neutral position based on the handle position signal, then step S240 is executed, that is, the engine is further controlled to stop based on the actual torque.

[0082] For example, the vehicle controller controls the specific opening degree of the hydraulic valve based on the handle position signal. For instance, if the handle position signal is 0, it represents the neutral position, and the corresponding hydraulic valve opening degree is 0. When the handle position signal is not equal to 0, it means that the working device needs to work, and the hydraulic valve is controlled to open. The size of the hydraulic valve opening degree corresponds one-to-one with the size of the handle position signal.

[0083] S231, The unauthorized control handle is in the neutral position.

[0084] Specifically, if it is determined from the handle position signal that the handle position is not in the neutral position, then step S231 is executed, that is, the handle position is controlled to be in the neutral position in an unauthorized manner, and the engine is further controlled to stop according to the actual torque, that is, step S240 is executed.

[0085] S240. Determine whether the torque difference between the actual torque and the friction torque is greater than or equal to the torque threshold. If yes, proceed to step S241; otherwise, proceed to step S242.

[0086] The torque threshold can be selected and set according to the engine shutdown requirement. The torque threshold is the torque value for determining engine shutdown. In this embodiment, the specific value of the torque threshold is not specially limited.

[0087] S241. After reporting a fault in the hydraulic valve of the hydraulic system, control the engine to stop.

[0088] Specifically, if the difference between the actual torque and the friction torque is greater than or equal to the torque threshold, then step S241 is executed, that is, after reporting a fault in the hydraulic valve in the hydraulic device, the engine is controlled to stop.

[0089] S242, Control engine shutdown.

[0090] Specifically, if the difference between the actual torque and the friction torque is less than the torque threshold, then step S242 is executed, which controls the engine to stop.

[0091] S250: When the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on the range extender start command.

[0092] Specifically, after the engine is shut down, that is, after executing step S241 or step S242, the vehicle is powered on again when the ignition switch is in the ON position.

[0093] S260. During the start-up process of the range extender, the starting current of the starter motor is obtained, and the engine is started based on the starting current.

[0094] Specifically, during the start-up process of the range extender, if the starting current exceeds the current threshold and the duration of the starting current exceeding the current threshold reaches the set time length, the engine will stop starting and a fault in the hydraulic valve in the hydraulic system will be reported; if the starting current does not exceed the current threshold, the engine will start.

[0095] Based on the same inventive concept Figure 4 This is a flowchart of a range extender start-stop control method provided by an embodiment of the present invention. Based on the above embodiments, this embodiment considers prioritizing starter motor activation according to fault conditions during range extender startup, and determining whether the fault still exists based on the starter motor's starting current during startup to ensure hydraulic system stability. This provides an optional implementation method. Figure 4 As shown, the range extender start-stop control method includes:

[0096] S310: When the ignition switch is in the ON position, the vehicle power is cut off, and the range extender is shut down based on the range extender shutdown command.

[0097] S320: During the range extender shutdown process, the vehicle controller receives the handle position signal and obtains the actual torque when the engine is idling, and controls the engine to shut down based on the handle position signal and the actual torque.

[0098] S330: When the ignition switch is in the ON position, the vehicle is powered on again, and the range extender is started based on the range extender start command.

[0099] S340. During the start-up process of the range extender, obtain the starting current of the starter motor.

[0100] S350. Determine whether the starting current exceeds the current threshold and whether the duration of the starting current exceeding the current threshold reaches the set time length. If yes, proceed to step S351; otherwise, proceed to step S352.

[0101] S351. Stop starting the engine and report a fault in the hydraulic valve of the hydraulic system.

[0102] Specifically, if the starting current exceeds the current threshold and the duration of the starting current exceeding the current threshold reaches the set time length, then step S351 is executed, that is, the engine is stopped from starting and a fault in the hydraulic valve in the hydraulic system is reported.

[0103] S352, Start the engine.

[0104] Specifically, if the starting current does not exceed the current threshold, step S352 is executed, that is, the engine continues to start. After the engine starts successfully, the fault is cleared from the memory.

[0105] Based on the same inventive concept Figure 5This is a schematic diagram of a range extender start-stop control device provided in an embodiment of the present invention. The range extender start-stop control device is applied to engineering machinery vehicles equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic system. The range extender includes a generator and an engine, and the generator is connected to the hydraulic system, such as... Figure 5 As shown, the range extender start / stop control device includes:

[0106] The range extender shutdown module 410 is used to cut off the vehicle power when the ignition switch is in the ON position and to control the range extender to shut down based on the range extender shutdown command.

[0107] The engine shutdown module 420 is used to receive the handle position signal through the vehicle controller and obtain the actual torque when the engine is idling during the range extender shutdown process, and control the engine to shut down according to the handle position signal and the actual torque.

[0108] The range extender restart module 430 is used to power up the vehicle again when the ignition switch is in the ON position, and to control the range extender to start based on the range extender start command.

[0109] The engine start module 440 is used to acquire the starter current of the starter motor during the start-up process of the range extender and determine whether to start the engine based on the starter current.

[0110] Optionally, the engine can be stopped based on the handle position signal and actual torque, specifically for:

[0111] If the handle position is determined to be in the neutral position based on the handle position signal, then the engine is stopped according to the actual torque.

[0112] If the handle position signal indicates that the handle is not in the neutral position, then the handle position is adjusted to the neutral position, and the engine is stopped based on the actual torque.

[0113] Optionally, the engine can be shut down based on the actual torque, specifically for:

[0114] If the difference between the actual torque and the friction torque is greater than or equal to the torque threshold, the engine will be shut down after a fault in the hydraulic valve in the hydraulic system is reported.

[0115] If the difference between the actual torque and the friction torque is less than the torque threshold, the engine will be shut down.

[0116] Optionally, the range extender start / stop control device also includes:

[0117] The unauthorized control handle position module is used to control the handle position to the neutral position if no handle position signal is received through the vehicle controller during the range extender shutdown process.

[0118] Optionally, the range extender start / stop control device also includes:

[0119] The position continuous control module is used to keep the position of the control handle in the neutral position.

[0120] Optionally, the engine start-up status can be determined based on the starting current, specifically for:

[0121] If the starting current exceeds the current threshold, and the duration of the starting current exceeding the current threshold reaches the set time length, then the engine will stop starting, and a hydraulic valve malfunction in the hydraulic system will be reported.

[0122] If the starting current does not exceed the current threshold, the engine will start.

[0123] Optionally, the range extender start / stop control device also includes:

[0124] The fault detection module is used to verify whether a hydraulic valve fault is reported during the restart of the range extender if a fault is reported in the hydraulic system during the shutdown process.

[0125] The range extender start-stop control device provided in the embodiments of the present invention can execute the range extender start-stop control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the range extender start-stop control method.

[0126] Based on the same inventive concept, the engineering machinery vehicle provided in the embodiments of the present invention includes a range-extended hybrid power system. The range-extended hybrid power system includes a range extender, a hydraulic device, a drive motor, and a power battery. The range extender includes a generator and an engine. The generator is connected to the power battery through a generator controller. The hydraulic device is connected to the generator. The drive motor is connected to the power battery through a drive motor controller.

[0127] further, Figure 6 A schematic diagram of the structure of an engineering machinery vehicle 510 that can be used to implement an embodiment of the present invention is shown. For example... Figure 6As shown, the construction machinery vehicle 510 also includes at least one processor 511 and a memory, such as a read-only memory (ROM 512) or a random access memory (RAM 513), communicatively connected to the at least one processor 511. The memory stores computer programs executable by the at least one processor. The processor 511 can perform various appropriate actions and processes based on the computer program stored in the read-only memory (ROM 512) or the computer program loaded from storage unit 518 into the random access memory (RAM 513). The RAM 513 can also store various programs and data required for the operation of the construction machinery vehicle 510. The processor 511, ROM 512, and RAM 513 are interconnected via a bus 514. An I / O (input / output) interface 515 is also connected to the bus 514.

[0128] Multiple components in the construction machinery vehicle 510 are connected to the I / O interface 515, including: an input unit 516, such as a keyboard, mouse, etc.; an output unit 517, such as various types of displays, speakers, etc.; a storage unit 518, such as a disk, optical disk, etc.; and a communication unit 519, such as a network card, modem, wireless transceiver, etc. The communication unit 519 allows the construction machinery vehicle 510 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0129] Processor 511 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 511 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 511 performs the various methods and processes described above, such as the range extender start-stop control method.

[0130] In some embodiments, the range extender start-stop control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 518. In some embodiments, part or all of the computer program may be loaded into and / or installed on the construction machinery vehicle 510 via ROM 512 and / or communication unit 519. When the computer program is loaded into RAM 513 and executed by processor 511, one or more steps of the range extender start-stop control method described above may be performed. Alternatively, in other embodiments, processor 511 may be configured to perform the range extender start-stop control method by any other suitable means (e.g., by means of firmware).

[0131] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0132] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0133] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0134] To provide user interaction, the systems and technologies described herein can be implemented on construction machinery vehicles, which include: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the construction machinery vehicle. Other types of devices can also be used to provide user interaction; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0135] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0136] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0137] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0138] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A start-stop control method for a range extender, characterized in that, The range extender start-stop control method is applied to engineering machinery vehicles equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic system. The range extender includes a generator and an engine, and the generator is connected to the hydraulic system. The range extender start-stop control method includes: The range extender is stopped based on the range extender stop command; During the range extender shutdown process, the vehicle controller receives a handle position signal and acquires the actual torque of the engine when it is idling. The engine is then shut down based on the handle position signal and the actual torque. This shutdown process includes: if the handle position signal indicates the handle is in the neutral position, the engine is shut down based on the actual torque; if the handle position signal indicates the handle is not in the neutral position, the controller overrides the control to position the handle in the neutral position and shuts down the engine based on the actual torque. Furthermore, the shutdown process based on the actual torque includes: if the difference between the actual torque and the friction torque is greater than or equal to a torque threshold, a hydraulic valve malfunction in the hydraulic system is reported, and the engine is shut down; if the difference between the actual torque and the friction torque is less than the torque threshold, the engine is shut down. The range extender is started based on the range extender start command; During the start-up process of the range extender, the starting current of the starter motor is acquired, and the engine is started based on the starting current. The process of determining whether to start the engine based on the starting current includes: if the starting current exceeds a current threshold, and the duration of the starting current exceeding the current threshold reaches a set time length, then the engine start-up is stopped, and a hydraulic valve malfunction in the hydraulic system is reported; if the starting current does not exceed the current threshold, then the engine is started.

2. The range extender start / stop control method according to claim 1, characterized in that, The range extender start / stop control method also includes: If the vehicle controller does not receive the handle position signal during the range extender shutdown process, it will override the control to keep the handle position in the neutral position.

3. The range extender start / stop control method according to claim 1, characterized in that, The range extender start / stop control method also includes: If a hydraulic valve malfunction is reported during the shutdown of the range extender, the presence of the hydraulic valve malfunction will be verified during the restart of the range extender.

4. A range extender start / stop control device, characterized in that, The range extender start-stop control device is applied to engineering machinery vehicles equipped with a range-extended hybrid power system. The range-extended hybrid power system includes a range extender and a hydraulic system. The range extender includes a generator and an engine, and the generator is connected to the hydraulic system. The range extender start-stop control device includes: The range extender shutdown module is used to execute a range extender shutdown command to control the range extender to shut down. An engine shutdown module is used to execute the following steps during the range extender shutdown process: receiving a handle position signal from the vehicle controller and acquiring the actual torque of the engine when it is idling; controlling the engine shutdown based on the handle position signal and the actual torque. Specifically, controlling the engine shutdown based on the handle position signal and the actual torque involves: if the handle position signal indicates it is in the neutral position, then controlling the engine shutdown based on the actual torque; if the handle position signal indicates it is not in the neutral position, then controlling the handle position to be in the neutral position and controlling the engine shutdown based on the actual torque. Specifically, controlling the engine shutdown based on the actual torque involves: if the torque difference between the actual torque and the friction torque is greater than or equal to a torque threshold, then reporting a hydraulic valve malfunction in the hydraulic system and controlling the engine shutdown; if the torque difference between the actual torque and the friction torque is less than the torque threshold, then controlling the engine shutdown. The range extender restart module is used to execute control of the range extender startup based on the range extender startup command; The engine start module is used to acquire the starter current of the starter motor during the start-up process of the range extender, and determine whether to start the engine based on the starter current; wherein, determining whether to start the engine based on the starter current is specifically used to: if the starter current exceeds a current threshold, and the duration of the starter current exceeding the current threshold reaches a set time length, then stop starting the engine and report a hydraulic valve malfunction in the hydraulic system; if the starter current does not exceed the current threshold, then start the engine.

5. An engineering machinery vehicle, characterized in that, The engineering machinery vehicle includes a range-extended hybrid power system, which includes a range extender, a hydraulic device, a drive motor, and a power battery. The range extender includes a generator and an engine. The generator is connected to the power battery through a generator controller. The hydraulic device is connected to the generator. The drive motor is connected to the power battery through a drive motor controller. The engineering machinery vehicles also include: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the range extender start-stop control method according to any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the range extender start-stop control method according to any one of claims 1-3.

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