Vehicle power take-off control method, device, equipment and storage medium

Abstract

The application discloses a vehicle power take-off control method and device, a vehicle power take-off control equipment and a storage medium, and the method is applied to a vehicle power take-off system, the vehicle power take-off system comprises a power take-off device and a driving motor, and the method comprises the following steps: after receiving a power take-off request signal, detecting a current gear of the vehicle; if it is detected that the current gear of the vehicle is a neutral gear, taking the maximum allowable input torque of the power take-off device as a torque limit value of the driving motor; if it is detected that the current gear of the vehicle is a forward gear, taking the peak torque of the driving motor as the torque limit value; and controlling an actual output torque of the driving motor during power take-off operation based on the torque limit value, wherein the actual output torque is not greater than the torque limit value. The application guarantees the safety of vehicle parking power take-off and the power performance of vehicle driving power take-off.

Description

Technical Field

[0001] This invention belongs to the field of automotive power take-off technology, and particularly relates to a vehicle power take-off control method, device, vehicle power take-off control equipment, and storage medium. Background Technology

[0002] With the rapid development of technology, in order to meet the operational needs of vehicle superstructure equipment, power take-off (PTO) devices are applied to vehicles to obtain power from the power system and transmit it to other superstructure equipment.

[0003] Currently, when a pure electric special-purpose vehicle is parked and performing power take-off (PTO) operations, all the power generated by the vehicle's motor is transmitted to the PTO to enable the superstructure equipment to operate at a constant speed. However, if the same power is transmitted to the PTO when the vehicle is in motion, the vehicle's driving dynamics cannot be guaranteed. Furthermore, when the superstructure equipment is operating at a constant speed, the vehicle's drive motor's speed is limited, but its torque is not. The actual output torque of the motor may exceed the maximum allowable output torque of the PTO. If the actual torque transmitted from the motor to the PTO exceeds the maximum allowable input torque of the PTO for an extended period, it may damage the PTO and other power transmission components, thus affecting the safety of the vehicle's power take-off operation. Summary of the Invention

[0004] The main objective of this invention is to provide a vehicle power take-off control method, device, equipment, and storage medium. This aims to ensure the safety of the vehicle's parking power take-off and the power performance of its driving power take-off.

[0005] To achieve the above objectives, the present invention provides a vehicle power take-off control method, which is applied to a vehicle power take-off system, the vehicle power take-off system including a power take-off unit and a drive motor, and the vehicle power take-off control method includes the following steps:

[0006] Upon receiving a power take-off request signal, the vehicle's current gear position is detected;

[0007] If it is detected that the current gear of the vehicle is in neutral, the maximum allowable input torque of the power take-off is used as the torque limit of the drive motor.

[0008] If it is detected that the current gear of the vehicle is forward, the peak torque of the drive motor is used as the torque limit.

[0009] The actual output torque of the drive motor during power take-off operation is controlled based on the torque limit, wherein the actual output torque does not exceed the torque limit.

[0010] Optionally, after the step of detecting that the vehicle is currently in neutral, the method further includes:

[0011] If the current driving speed of the vehicle is less than or equal to the preset driving speed, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged, then the solenoid valve of the power take-off unit is controlled to close to perform power take-off operation. The power take-off request switch is used to feedback the user's power take-off intention.

[0012] Optionally, after the step of detecting that the vehicle is currently in a forward gear, the method further includes:

[0013] If the vehicle's power take-off request switch is closed and the vehicle's handbrake is released, then the solenoid valve of the power take-off unit is closed to perform power take-off operation.

[0014] Optionally, before the step of using the maximum permissible input torque of the power take-off as the torque limit of the drive motor, the method further includes:

[0015] Based on the maximum permissible output torque and speed ratio of the power take-off (PTO), the maximum permissible input torque of the PTO is calculated.

[0016] Optionally, after the step of controlling the actual output torque of the drive motor during power take-off operation based on the torque limit, the method further includes:

[0017] Based on a preset torque distribution ratio, the actual output torque is distributed to the vehicle's drive shaft and the power take-off unit, wherein the drive shaft is used to provide driving power to the vehicle.

[0018] Optionally, before the step of distributing the actual output torque to the vehicle's driveshaft and the power take-off based on a preset torque distribution ratio, the method further includes:

[0019] Obtain the gear ratio corresponding to the current forward gear of the vehicle;

[0020] The ratio of the transmission speed ratio to the power take-off speed ratio is used as the torque distribution ratio of the drive motor.

[0021] Optionally, after the step of controlling the actual output torque of the drive motor during power take-off operation based on the torque limit, the method further includes:

[0022] Based on the torque distribution ratio and the actual output torque, the transmission torque obtained by the power take-off from the drive motor is estimated;

[0023] Detect whether the transmitted torque is greater than the maximum allowable input torque;

[0024] If the transmitted torque is detected to be greater than the maximum permissible input torque, then the transmitted torque is limited to the maximum permissible input torque;

[0025] If the transmitted torque is detected to be less than or equal to the maximum allowable input torque, then the step of distributing the actual output torque to the drive shaft and the power take-off based on the torque distribution ratio is performed.

[0026] Furthermore, to achieve the above objectives, the present invention also provides a vehicle power take-off control device, which is applied to a vehicle power take-off system, the vehicle power take-off system including a power take-off unit and a drive motor, and the vehicle power take-off control device includes the following steps:

[0027] The gear position detection module is used to detect the current gear of the vehicle after receiving a power take-off request signal;

[0028] The parking power take-off module is used to use the maximum allowable input torque of the power take-off unit as the torque limit of the drive motor if it is detected that the current gear of the vehicle is neutral.

[0029] The driving power take-off module is used to use the peak torque of the drive motor as the torque limit if it is detected that the current gear of the vehicle is forward.

[0030] A torque control module is used to control the actual output torque of the drive motor when performing power take-off operations based on the torque limit, wherein the actual output torque does not exceed the torque limit.

[0031] In addition, to achieve the above objectives, the present invention also provides a vehicle power take-off control device, the vehicle power take-off control device comprising: a memory, a processor, and a vehicle power take-off control program stored in the memory and executable on the processor, wherein when the vehicle power take-off control program of the vehicle power take-off control device is executed by the processor, the steps of the vehicle power take-off control method as described above are implemented.

[0032] In addition, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a vehicle power take-off control program, which, when executed by a processor, implements the steps of the vehicle power take-off control method as described above.

[0033] The vehicle power take-off control method of the present invention is applied to a vehicle power take-off system, which includes a power take-off unit and a drive motor.

[0034] This invention, upon receiving a power take-off (PTO) request signal, detects the vehicle's current gear. When the vehicle is in neutral, the maximum permissible input torque of the PTO is used as the torque limit for the drive motor. When the vehicle is in a drive gear, the peak torque achievable by the drive motor is used as the torque limit. The actual output torque of the drive motor during PTO operation is then controlled based on these torque limits, ensuring that the actual output torque of the drive motor does not exceed the preset torque limit. Thus, this invention ensures the safety of PTO when the vehicle is parked (i.e., all power generated by the drive motor is transmitted to the PTO) by setting the drive motor's torque limit to the maximum allowable torque for safe operation of the PTO. Conversely, when the vehicle is in motion (i.e., during PTO), the drive motor's torque limit is set to the peak torque achievable by the motor itself, allowing excess power to be transmitted to the vehicle's drivetrain, thereby ensuring the dynamism of PTO during motion. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the hardware operating environment of the vehicle power take-off control device involved in the embodiments of the present invention;

[0036] Figure 2 This is a flowchart illustrating the steps of the first embodiment of the vehicle power take-off control method of the present invention;

[0037] Figure 3 This is a schematic diagram of the overall power take-off control process according to an embodiment of the vehicle power take-off control method of the present invention;

[0038] Figure 4 This is a schematic diagram of the functional modules of an embodiment of the vehicle power take-off control device of the present invention.

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0041] Reference Figure 1 , Figure 1 This is a schematic diagram of the hardware operating environment of the vehicle power take-off control device involved in the embodiment of the present invention.

[0042] It should be noted that the embodiments of the present invention relate to a vehicle power take-off control device integrating a vehicle power take-off system in the field of automotive power take-off technology. Specifically, the vehicle power take-off control device can be a vehicle integrating a vehicle power take-off system, a smartphone, a PC (Personal Computer), a tablet computer, a portable computer, etc.

[0043] like Figure 1 As shown, the vehicle power take-off control device may include: a processor 1001, such as a CPU; a communication bus 1002; a user interface 1003; a network interface 1004; and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0044] Those skilled in the art will understand that Figure 1 The vehicle power take-off control device structure shown does not constitute a limitation on the vehicle power take-off control device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0045] like Figure 1 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a vehicle power take-off control program.

[0046] exist Figure 1 In the vehicle power take-off control device shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with it; the user interface 1003 is mainly used to connect to the client and communicate data with it; and the processor 1001 can be used to call the vehicle power take-off control program stored in the memory 1005 and perform the following operations:

[0047] Upon receiving a power take-off request signal, the vehicle's current gear position is detected;

[0048] If it is detected that the current gear of the vehicle is in neutral, the maximum allowable input torque of the power take-off is used as the torque limit of the drive motor.

[0049] If it is detected that the current gear of the vehicle is forward, the peak torque of the drive motor is used as the torque limit.

[0050] The actual output torque of the drive motor during power take-off operation is controlled based on the torque limit, wherein the actual output torque does not exceed the torque limit.

[0051] Furthermore, after detecting that the vehicle is currently in neutral, the processor 1001 can also call the vehicle power take-off control program stored in the memory 1005 to perform the following operations:

[0052] If the current driving speed of the vehicle is less than or equal to the preset driving speed, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged, then the solenoid valve of the power take-off unit is controlled to close to perform power take-off operation. The power take-off request switch is used to feedback the user's power take-off intention.

[0053] Furthermore, after detecting that the vehicle is currently in a forward gear, the processor 1001 can also call the vehicle power take-off control program stored in the memory 1005 to perform the following operations:

[0054] If the vehicle's power take-off request switch is closed and the vehicle's handbrake is released, then the solenoid valve of the power take-off unit is closed to perform power take-off operation.

[0055] Furthermore, before the step of using the maximum permissible input torque of the power take-off unit as the torque limit of the drive motor, the processor 1001 can also call the vehicle power take-off control program stored in the memory 1005 to perform the following operations:

[0056] Based on the maximum permissible output torque and speed ratio of the power take-off (PTO), the maximum permissible input torque of the PTO is calculated.

[0057] Furthermore, after the step of controlling the actual output torque of the drive motor during power take-off operation based on the torque limit, the processor 1001 can also call the vehicle power take-off control program stored in the memory 1005 to perform the following operations:

[0058] Based on a preset torque distribution ratio, the actual output torque is distributed to the vehicle's drive shaft and the power take-off unit, wherein the drive shaft is used to provide driving power to the vehicle.

[0059] Furthermore, before the step of distributing the actual output torque to the vehicle's driveshaft and the power take-off based on a preset torque distribution ratio, the processor 1001 can also call the vehicle power take-off control program stored in the memory 1005 to perform the following operations:

[0060] Obtain the gear ratio corresponding to the current forward gear of the vehicle;

[0061] The ratio of the transmission speed ratio to the power take-off speed ratio is used as the torque distribution ratio of the drive motor.

[0062] Furthermore, after the step of controlling the actual output torque of the drive motor during power take-off operation based on the torque limit, the processor 1001 can also call the vehicle power take-off control program stored in the memory 1005 to perform the following operations:

[0063] Based on the torque distribution ratio and the actual output torque, the transmission torque obtained by the power take-off from the drive motor is estimated;

[0064] Detect whether the transmitted torque is greater than the maximum allowable input torque;

[0065] If the transmitted torque is detected to be greater than the maximum permissible input torque, then the transmitted torque is limited to the maximum permissible input torque;

[0066] If the transmitted torque is detected to be less than or equal to the maximum allowable input torque, then the step of distributing the actual output torque to the drive shaft and the power take-off based on the torque distribution ratio is performed.

[0067] Based on the above structure, various embodiments of the vehicle power take-off control method are proposed.

[0068] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the vehicle power take-off control method of the present invention. It should be noted that although the logical order is shown in the flowchart, in some cases, the vehicle power take-off control method of the present invention may execute the steps shown or described in a different order. In this embodiment, the executing entity of the vehicle power take-off control method can be a new energy vehicle, a personal computer, a smartphone, or other devices; there is no limitation in this embodiment. For ease of description, the executing entity is omitted from the description of each embodiment below. The vehicle power take-off control method includes:

[0069] Step S10: After receiving the power take-off request signal, detect the current gear position of the vehicle;

[0070] After receiving a power take-off request signal, the vehicle's current gear is detected.

[0071] In one feasible implementation, the vehicle driver presses a power take-off request switch on the vehicle to generate a power take-off request signal. Then, the power domain controller in the vehicle receives the power take-off request signal, and after the power domain controller receives the power take-off request signal, the vehicle detects the current gear.

[0072] Step S20: If it is detected that the current gear of the vehicle is in neutral, the maximum allowable input torque of the power take-off is used as the torque limit of the drive motor.

[0073] If the vehicle is detected to be in neutral, the maximum allowable input torque of the power take-off unit will be used as the torque limit of the drive motor.

[0074] In one feasible implementation, the vehicle's current gear is detected. If the vehicle is currently in neutral, it is in a parked state, and therefore the vehicle's entire drivetrain has no power demand. This means that all the power output from the drive motor is transmitted to the power take-off (PTO). Specifically, the PTO engages with the drive motor's output shaft via an intermediate shaft, thus transmitting the drive motor's power to the PTO's output shaft. Therefore, to prevent the PTO's actual output torque from exceeding its maximum permissible output torque for an extended period, the PTO's maximum permissible input torque is set as the drive motor's torque limit.

[0075] Furthermore, in a feasible embodiment, the vehicle power take-off control method of the present invention, before the step of "using the maximum permissible input torque of the power take-off as the torque limit of the drive motor" in step S20 above, may further include:

[0076] Step A10: Calculate the maximum allowable input torque of the power take-off (PTO) based on the PTO's maximum allowable output torque and PTO speed ratio.

[0077] Calculate the maximum allowable input torque of the power take-off (PTO) based on its maximum permissible output torque and speed ratio.

[0078] It should be noted that, according to the principles of mechanics, the formula for the relationship between torque and speed ratio is: Output torque = Input torque * Speed ​​ratio.

[0079] In one feasible implementation, if the maximum permissible output torque of the power take-off is 500 Nm and the power take-off speed ratio is 1.25, then the maximum permissible input torque of the power take-off can be calculated to be 400 Nm.

[0080] Furthermore, in a feasible embodiment, after the step of "detecting that the vehicle is in neutral" in step S20 above, it may further include:

[0081] Step B10: If the current driving speed of the vehicle is less than or equal to the preset driving speed, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged, then the solenoid valve of the power take-off unit is controlled to close to perform power take-off operation. The power take-off request switch is used to feedback the user's power take-off intention.

[0082] If the vehicle's current speed is less than or equal to the preset speed, the vehicle's power take-off request switch is closed, and the vehicle's handbrake is engaged, the solenoid valve of the power take-off unit will be closed to perform power take-off operation. The power take-off request switch is used to feedback the user's power take-off intention.

[0083] It should be noted that the power take-off conditions for a vehicle to perform power take-off work are different when the vehicle is in different gears. Therefore, the power take-off conditions that the vehicle needs to meet when it is in neutral are called the first power take-off conditions, and the power take-off conditions that the vehicle needs to meet when it is in drive are called the second power take-off conditions.

[0084] In one feasible implementation, when the vehicle is Ready, it is detected whether the current driving speed of the vehicle is less than or equal to a preset driving speed of 3 km / h, whether the power take-off request switch of the vehicle is closed, and whether the handbrake of the vehicle is engaged. If it is detected that the current driving speed of the vehicle is less than or equal to the preset driving speed of 3 km / h, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged, then it is determined that the vehicle meets the first power take-off condition. The transmission controller in the vehicle controls the solenoid valve of the power take-off unit to close based on the obtained power take-off request signal to perform power take-off operation.

[0085] Step S30: If it is detected that the current gear of the vehicle is forward, the peak torque of the drive motor is used as the torque limit.

[0086] If the vehicle is detected to be in a forward gear, the peak torque of the drive motor itself will be used as the torque limit.

[0087] In one feasible implementation, the current gear position of the vehicle is detected. If the current gear position is forward, the vehicle is in a driving state, so the vehicle's entire driving transmission system has a power demand. That is to say, at this time, the power output by the drive motor will be transmitted to the power take-off and the entire driving transmission system respectively. Then, the peak torque that the drive motor itself can output is used as the above-mentioned torque limit. In other words, the maximum output torque of the drive motor is not limited.

[0088] Furthermore, in a feasible embodiment, after the step of "detecting that the vehicle is in a forward gear" in step S30 above, it may further include:

[0089] Step C10: If the power take-off request switch of the vehicle is closed and the handbrake of the vehicle is released, then control the solenoid valve of the power take-off unit to close to perform power take-off operation.

[0090] If the power take-off request switch on the vehicle is detected to be closed and the vehicle's handbrake is released, the power take-off solenoid valve is controlled to close to perform power take-off operation.

[0091] In one feasible implementation, when the vehicle is Ready, it is detected whether the vehicle's power take-off request switch is closed and whether the vehicle's handbrake is engaged. If the vehicle's power take-off request switch is closed and the vehicle's handbrake is engaged, it is determined that the vehicle meets the second power take-off condition. The transmission controller in the vehicle controls the solenoid valve of the power take-off unit to close based on the obtained power take-off request signal to perform power take-off operation.

[0092] Step S40: Control the actual output torque of the drive motor when performing power take-off operation based on the torque limit, wherein the actual output torque does not exceed the torque limit.

[0093] The actual output torque of the drive motor during power take-off operations is controlled based on the torque limit, wherein the actual output torque of the drive motor does not exceed the preset torque limit.

[0094] In one feasible implementation, such as Figure 3 As shown in the overall flowchart of the power take-off control, firstly, after receiving the power take-off request signal, the current gear of the vehicle is detected. If the current gear is detected to be neutral, the output torque of the drive motor is limited, and it is checked whether the vehicle meets the first power take-off condition. If the current gear is detected to be neutral, the output torque of the drive motor is not limited, and it is checked whether the vehicle meets the second power take-off condition. If the current gear is neutral and the vehicle meets the first power take-off condition, or if the current gear is a drive gear and the vehicle meets the second power take-off condition, then the power take-off is activated to perform power take-off operation.

[0095] In this embodiment, the vehicle power take-off control method of the present invention detects the current gear position of the vehicle after receiving a power take-off request signal. If the current gear position is detected as neutral, the maximum allowable input torque of the power take-off unit is used as the torque limit of the drive motor. The maximum allowable input torque is calculated in advance based on the maximum allowable output torque of the power take-off unit and the speed ratio of the power take-off unit. At the same time, it is determined whether the vehicle meets the first power take-off condition. If the current driving speed of the vehicle is less than or equal to the preset driving speed, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged, then the vehicle is determined to meet the first power take-off condition. Based on the power take-off request signal, the solenoid valve of the power take-off unit is controlled to close to perform power take-off operation. If the current gear position is detected as drive, the peak torque of the drive motor itself is used as the torque limit, and it is determined whether the vehicle meets the second power take-off condition. If the power take-off request switch of the vehicle is closed and the handbrake of the vehicle is disengaged, then the vehicle is determined to meet the second power take-off condition, and the solenoid valve is controlled to close to perform power take-off operation. Finally, the actual output torque of the drive motor during power take-off operation is controlled based on the torque limit.

[0096] Thus, this embodiment of the invention, upon receiving a power take-off (PTO) request signal, detects the vehicle's current gear. When the vehicle is in neutral, the maximum permissible input torque of the PTO is used as the torque limit for the drive motor. When the vehicle is in a drive gear, the peak torque achievable by the drive motor itself is used as the torque limit. Then, based on the obtained torque limits, the actual output torque of the drive motor during PTO operation is controlled, wherein the actual output torque of the drive motor does not exceed the preset torque limit. Thus, this embodiment of the invention ensures the safety of PTO when the vehicle is parked (i.e., all power generated by the drive motor is transmitted to the PTO) by setting the torque limit of the drive motor to the maximum allowable torque for safe operation of the PTO; and when the vehicle is driving (i.e., PTO is driven while in motion), by setting the torque limit of the drive motor to the peak torque achievable by the motor itself, thereby providing power to the entire vehicle's drivetrain and ensuring the dynamism of PTO while in motion.

[0097] Furthermore, based on the first embodiment of the vehicle power take-off control method of the present invention described above, a second embodiment of the vehicle power take-off control method of the present invention is proposed.

[0098] In this embodiment, after step S40 described above, the following may also be included:

[0099] Step D10: Based on a preset torque distribution ratio, the actual output torque is distributed to the drive shaft of the vehicle and the power take-off unit, wherein the drive shaft is used to provide driving power to the vehicle.

[0100] Based on a preset torque distribution ratio, the actual output torque is distributed to the vehicle's driveshaft and power take-off unit, whereby the driveshaft is used to provide driving power to the vehicle.

[0101] Furthermore, in a feasible embodiment, prior to step D10 described above, the following may also be included:

[0102] Step E10: Obtain the transmission ratio corresponding to the current forward gear of the vehicle;

[0103] Based on the vehicle's current forward gear, obtain the transmission ratio corresponding to the forward gear.

[0104] It should be noted that the speed ratio refers to the ratio of the driving and driven bevel gears, that is, the number of teeth of the driven bevel gear / the number of teeth of the driving bevel gear. The smaller the speed ratio, the better the climbing performance, but the slower the speed. The ratio of the rotational speed of the input shaft to the output shaft of the transmission is called the transmission ratio. When the transmission ratio is greater than 1, the larger the transmission ratio, the lower the gear. When the transmission ratio is 1, it is a direct drive, and when it is less than 1, it is an overdrive.

[0105] Step E20: The ratio of the transmission speed ratio to the power take-off speed ratio is used as the torque distribution ratio of the drive motor.

[0106] The ratio of the transmission speed ratio to the power take-off speed ratio is used as the torque distribution ratio of the drive motor.

[0107] In one feasible implementation, if the gearbox is in 1st gear, the corresponding transmission ratio is 6.25 and the power take-off ratio is 1.25, then the ratio between the transmission ratio and the power take-off ratio is 5:1, and this ratio is then used as the torque distribution ratio of the drive motor.

[0108] Furthermore, in a feasible embodiment, after step S40 above, the following may also be included:

[0109] Step F10: Based on the torque distribution ratio and the actual output torque, estimate the transmission torque that the power take-off will obtain from the drive motor;

[0110] Based on the torque distribution ratio and the actual output torque, the transmission torque obtained by the power take-off from the drive motor is estimated.

[0111] In one feasible implementation, if the torque distribution ratio is 5:1 and the actual output torque is 900 Nm, then the estimated torque transmitted from the drive motor to the power take-off is 150 Nm; if the torque distribution ratio is 1:4 and the actual output torque is 900 Nm, then the estimated torque transmitted from the drive motor to the power take-off is 720 Nm.

[0112] Step F20: Detect whether the transmitted torque is greater than the maximum permissible input torque;

[0113] Check whether the transmitted torque is greater than the maximum permissible output torque.

[0114] In one feasible implementation, it is detected whether the estimated transmission torque is greater than the maximum permissible output torque of the drive motor, which is 500 Nm.

[0115] Step F30: If the transmitted torque is detected to be greater than the maximum permissible input torque, then the transmitted torque is limited to the maximum permissible input torque;

[0116] If the transmitted torque is detected to be greater than the maximum permissible output torque, the transmitted torque is limited to the maximum permissible input torque of the power take-off.

[0117] In one feasible implementation, if the actual output torque is 900 Nm and the estimated transmission torque is 600 Nm, that is, the estimated transmission torque is greater than the maximum permissible output torque, then the first torque is the maximum permissible output torque of the power take-off (PTO) of 500 Nm, and the first torque is transmitted to the PTO. The second torque is the difference between the actual output torque and the maximum permissible output torque of 400 Nm.

[0118] Step F40: If the transmitted torque is detected to be less than or equal to the maximum allowable input torque, then the step of distributing the actual output torque to the drive shaft and the power take-off based on the torque distribution ratio is executed.

[0119] If the detected transmission torque is less than or equal to the maximum permissible output torque, the actual output torque is distributed to the drive shaft and power take-off based on the torque distribution ratio.

[0120] In one feasible implementation, if the actual output torque is 900 Nm and the estimated transmission torque is 150 Nm, that is, the estimated transmission torque is less than the maximum allowable input torque, then the actual output torque of the drive motor is transmitted to the drive shaft and the output shaft of the power take-off according to the torque distribution ratio.

[0121] In this embodiment, when the vehicle's current gear is detected to be a forward gear, the vehicle power take-off control method of the present invention obtains the transmission ratio corresponding to the forward gear based on the current forward gear; uses the ratio of the transmission ratio to the power take-off ratio as the torque distribution ratio of the drive motor; estimates the transmission torque obtained by the power take-off from the drive motor based on the torque distribution ratio and the actual output torque; detects whether the transmission torque is greater than the maximum allowable input torque; if the transmission torque is detected to be greater than the maximum allowable input torque, the transmission torque is limited to the maximum allowable input torque of the power take-off; if the transmission torque is detected to be less than or equal to the maximum allowable input torque of the power take-off, the actual output torque is distributed to the drive shaft and the power take-off based on the torque distribution ratio.

[0122] Thus, the present invention calculates the ratio between the transmission ratio corresponding to the current gear of the vehicle and the power take-off (PTO) ratio when the vehicle needs to take power for driving. This ratio is used as the power distribution ratio of the drive motor, and the torque distributed to the PTO is limited to not exceeding the maximum allowable input torque of the PTO. This ensures that the PTO and other power transmission components such as the superstructure are not damaged when the vehicle is performing power take-off operation.

[0123] Furthermore, embodiments of the present invention also provide a vehicle power take-off control device, which is applied to a vehicle power take-off system, the vehicle power take-off system including a power take-off unit and a drive motor.

[0124] Please refer to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of the vehicle power take-off control device of the present invention, as shown below. Figure 4 As shown, the vehicle power take-off control device of the present invention includes:

[0125] The gear position detection module 10 is used to detect the current gear of the vehicle after receiving a power take-off request signal;

[0126] The parking power take-off module 20 is used to use the maximum allowable input torque of the power take-off unit as the torque limit of the drive motor if it is detected that the current gear of the vehicle is neutral.

[0127] The driving power take-off module 30 is used to use the peak torque of the drive motor as the torque limit if it is detected that the current gear of the vehicle is forward.

[0128] The torque control module 40 is used to control the actual output torque of the drive motor when performing power take-off operation based on the torque limit, wherein the actual output torque does not exceed the torque limit.

[0129] Furthermore, the vehicle power take-off control device of the present invention further includes:

[0130] The first power take-off module is used to control the solenoid valve of the power take-off unit to close to perform power take-off operation if the current driving speed of the vehicle is less than or equal to a preset driving speed, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged. The power take-off request switch is used to feedback the user's power take-off intention.

[0131] Furthermore, the vehicle power take-off control device of the present invention further includes:

[0132] The second power take-off module is used to control the solenoid valve of the power take-off unit to close in order to perform power take-off operation if the power take-off request switch of the vehicle is closed and the handbrake of the vehicle is released.

[0133] Furthermore, the vehicle power take-off control device of the present invention further includes:

[0134] The torque calculation module is used to calculate the maximum allowable input torque of the power take-off based on the maximum allowable output torque of the power take-off and the speed ratio of the power take-off.

[0135] Furthermore, the vehicle power take-off control device of the present invention further includes:

[0136] The first torque distribution module is used to distribute the actual output torque to the drive shaft and the power take-off of the vehicle based on a preset torque distribution ratio, wherein the drive shaft is used to provide driving power to the vehicle.

[0137] Furthermore, the vehicle power take-off control device of the present invention further includes:

[0138] The transmission ratio acquisition module is used to acquire the transmission ratio corresponding to the current forward gear of the vehicle;

[0139] The allocation ratio module is used to use the ratio of the transmission speed ratio and the power take-off speed ratio as the torque allocation ratio of the drive motor.

[0140] Furthermore, the vehicle power take-off control device of the present invention further includes:

[0141] A torque estimation module is used to estimate the transmission torque obtained by the power take-off from the drive motor based on the torque distribution ratio and the actual output torque.

[0142] The torque detection module is used to detect whether the transmitted torque is greater than the maximum allowable input torque;

[0143] The second torque distribution module is used to use the maximum allowable input torque of the power take-off as the torque limit of the drive motor if the transmitted torque is detected to be greater than the maximum allowable input torque.

[0144] The first torque distribution module is further configured to, if the transmitted torque is detected to be less than or equal to the maximum allowable input torque, execute the step of distributing the actual output torque to the drive shaft and the power take-off based on the torque distribution ratio.

[0145] The present invention also provides a computer storage medium storing a vehicle power take-off control program, wherein when the vehicle power take-off control program is executed by a processor, the steps of the vehicle power take-off control program method as described in any of the above embodiments are implemented.

[0146] The specific embodiments of the computer storage medium of the present invention are basically the same as the embodiments of the vehicle power take-off control program method of the present invention described above, and will not be repeated here.

[0147] The present invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the vehicle power take-off control method of the present invention as described in any of the above embodiments, which will not be elaborated here.

[0148] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0149] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0150] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a vehicle power take-off control device (which may be a TWS earphone, etc.) to execute the methods described in the various embodiments of the present invention.

[0151] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A vehicle power take-off control method, characterized in that, The vehicle power take-off control method is applied to a vehicle power take-off system, which includes a power take-off unit and a drive motor. The vehicle power take-off control method includes the following steps: Upon receiving a power take-off request signal, the vehicle's current gear position is detected; If it is detected that the current gear of the vehicle is in neutral, the maximum allowable input torque of the power take-off is used as the torque limit of the drive motor. If it is detected that the current gear of the vehicle is forward, the peak torque of the drive motor is used as the torque limit. The actual output torque of the drive motor during power take-off operation is controlled based on the torque limit, wherein the actual output torque does not exceed the torque limit. Based on the preset torque distribution ratio and the actual output torque, the transmission torque obtained by the power take-off from the drive motor is estimated; Detect whether the transmitted torque is greater than the maximum allowable input torque; If the transmitted torque is detected to be greater than the maximum permissible input torque, then the transmitted torque is limited to the maximum permissible input torque; If the transmitted torque is detected to be less than or equal to the maximum permissible input torque, the actual output torque is distributed to the vehicle's drive shaft and the power take-off unit based on the torque distribution ratio.

2. The vehicle power take-off control method as described in claim 1, characterized in that, After the step of detecting that the vehicle is currently in neutral, the method further includes: If the current driving speed of the vehicle is less than or equal to the preset driving speed, the power take-off request switch of the vehicle is closed, and the handbrake of the vehicle is engaged, then the solenoid valve of the power take-off unit is controlled to close to perform power take-off operation. The power take-off request switch is used to feedback the user's power take-off intention.

3. The vehicle power take-off control method as described in claim 1, characterized in that, After the step of detecting that the vehicle is currently in a forward gear, the method further includes: If the vehicle's power take-off request switch is closed and the vehicle's handbrake is released, then the solenoid valve of the power take-off unit is closed to perform power take-off operation.

4. The vehicle power take-off control method as described in claim 1, characterized in that, Before the step of using the maximum permissible input torque of the power take-off unit as the torque limit of the drive motor, the method further includes: Based on the maximum permissible output torque and speed ratio of the power take-off (PTO), the maximum permissible input torque of the PTO is calculated.

5. The vehicle power take-off control method as described in any one of claims 1 to 4, characterized in that, After the step of controlling the actual output torque of the drive motor during power take-off operation based on the torque limit, the method further includes: Based on a preset torque distribution ratio, the actual output torque is distributed to the vehicle's drive shaft and the power take-off unit, wherein the drive shaft is used to provide driving power to the vehicle.

6. The vehicle power take-off control method as described in claim 5, characterized in that, Before the step of distributing the actual output torque to the vehicle's driveshaft and the power take-off based on a preset torque distribution ratio, the method further includes: Obtain the gear ratio corresponding to the current forward gear of the vehicle; The ratio of the transmission speed ratio to the power take-off speed ratio is used as the torque distribution ratio of the drive motor.

7. A vehicle power take-off control device, characterized in that, The vehicle power take-off control device is applied to the vehicle power take-off system, which includes a power take-off unit and a drive motor. The vehicle power take-off control device includes the following steps: The gear position detection module is used to detect the current gear of the vehicle after receiving a power take-off request signal; The parking power take-off module is used to use the maximum allowable input torque of the power take-off unit as the torque limit of the drive motor if it is detected that the current gear of the vehicle is neutral. The driving power take-off module is used to use the peak torque of the drive motor as the torque limit if it is detected that the current gear of the vehicle is forward. A torque control module is used to control the actual output torque of the drive motor when performing power take-off operation based on the torque limit, wherein the actual output torque does not exceed the torque limit. A torque estimation module is used to estimate the transmission torque obtained by the power take-off from the drive motor based on a preset torque distribution ratio and the actual output torque. The torque detection module is used to detect whether the transmitted torque is greater than the maximum allowable input torque; The second torque distribution module is used to limit the transmission torque to the maximum allowable input torque if it is detected that the transmission torque is greater than the maximum allowable input torque. The first torque distribution module is used to distribute the actual output torque to the drive shaft of the vehicle and the power take-off based on the torque distribution ratio if the transmitted torque is detected to be less than or equal to the maximum allowable input torque.

8. A vehicle power take-off control device, characterized in that, The vehicle power take-off control device includes: a memory and a processor. The memory stores a vehicle power take-off control program that can run on the processor. When the vehicle power take-off control program is executed by the processor, it implements the steps of the vehicle power take-off control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a vehicle power take-off control program, which, when executed by a processor, implements the steps of the vehicle power take-off control method as described in any one of claims 1 to 6.

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