CN-116872748-B - Vehicle power take-off control method, device, equipment and storage medium

CN116872748BCN 116872748 BCN116872748 BCN 116872748BCN-116872748-B

Abstract

The invention discloses a vehicle power take-off control method, a device, vehicle power take-off control equipment and a storage medium, wherein 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, the method detects the current gear of a vehicle after receiving a power take-off request signal, if the current gear of the vehicle is detected to be neutral, the maximum allowable input torque of the power take-off device is used as a torque limit value of the driving motor, if the current gear of the vehicle is detected to be a forward gear, the peak torque of the driving motor is used as the torque limit value, and the actual output torque of the driving motor during power take-off operation is controlled based on the torque limit value, wherein the actual output torque is not exceeding the torque limit value at maximum. The invention ensures the safety of the parking power take-off of the vehicle and the dynamic property of the driving power take-off.

Inventors

YANG ZHAO
LI GUANGQUAN
CHEN LONG
Feng Dengan
ZHAI YI

Assignees

浙江吉利控股集团有限公司
浙江吉利新能源商用车集团有限公司
吉利四川商用车有限公司
南充吉利商用车研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20230717

Claims (9)

1. The vehicle power take-off control method is characterized by being applied to a vehicle power take-off system, wherein the vehicle power take-off system comprises a power take-off and a driving motor, and comprises the following steps of: detecting the current gear of the vehicle after receiving a power take-off request signal; If the current gear of the vehicle is detected to be neutral, taking the maximum allowable input torque of the power takeoff as a torque limit value of the driving motor; if the current gear of the vehicle is detected to be the forward gear, taking the peak torque of the driving motor as the torque limit value; Controlling the actual output torque of the driving motor when the power taking operation is performed based on the torque limit value, wherein the maximum actual output torque does not exceed the torque limit value; Based on a preset torque distribution ratio and the actual output torque, estimating the transmission torque acquired by the power takeoff from the driving motor; detecting whether the transmission torque is greater than the maximum allowable input torque; limiting the transmission torque to the maximum allowable input torque if the transmission torque is detected to be greater than the maximum allowable input torque; and if the transmission torque is detected to be smaller than or equal to the maximum allowable input torque, distributing the actual output torque to a transmission shaft of the vehicle and the power takeoff based on the torque distribution ratio.
2. The vehicle power take-off control method according to claim 1, wherein after the step of detecting that the gear in which the vehicle is currently located is neutral, the method further comprises: If the current running speed of the vehicle is smaller than or equal to the preset running speed, the power take-off request switch of the vehicle is in a closed state and the hand brake of the vehicle is in a pulled state, the electromagnetic valve of the power take-off device is controlled to be closed so as to perform power take-off operation, wherein the power take-off request switch is used for feeding back the power take-off intention of a user.
3. The vehicle power take-off control method according to claim 1, wherein after the step of detecting that the gear in which the vehicle is currently located is a forward gear, the method further comprises: And if the power take-off request switch of the vehicle is in a closed state and the hand brake of the vehicle is in a put-down state, controlling the electromagnetic valve of the power take-off device to be closed so as to take-off.
4. The vehicle power take-off control method according to claim 1, characterized in that before the step of taking the maximum allowable input torque of the power take-off as the torque limit value of the drive motor, the method further includes: and calculating the maximum allowable input torque of the power takeoff based on the maximum allowable output torque of the power takeoff and the power takeoff speed ratio.
5. The vehicle power take-off control method according to any one of claims 1 to 4, characterized in that, after the step of controlling the actual output torque of the drive motor at the time of power take-off based on the torque limit value, the method further comprises: And distributing the actual output torque to a transmission shaft of the vehicle and the power takeoff based on a preset torque distribution ratio, wherein the transmission shaft is used for providing driving power for the vehicle.
6. The vehicle power take-off control method according to claim 5, wherein before the step of distributing the actual output torque to the propeller shaft of the vehicle and the power take-off based on a preset torque distribution ratio, the method further comprises: acquiring a transmission speed ratio corresponding to a forward gear where the vehicle is currently located; and taking the ratio of the transmission speed ratio to the power takeoff speed ratio as the torque distribution ratio of the driving motor.
7. The vehicle power take-off control device is characterized in that the vehicle power take-off control device is applied to a vehicle power take-off system, the vehicle power take-off system comprises a power take-off and a driving motor, and the vehicle power take-off control device comprises the following steps: the gear detection module is used for detecting the current gear of the vehicle after receiving the power taking request signal; the parking power take-off module is used for taking the maximum allowable input torque of the power take-off as the torque limit value of the driving motor if the current gear of the vehicle is detected to be neutral; The driving power taking module is used for taking the peak torque of the driving motor as the torque limit value if the current gear of the vehicle is detected to be a forward gear; The torque control module is used for controlling the actual output torque of the driving motor when the driving motor performs force taking operation based on the torque limit value, wherein the maximum actual output torque does not exceed the torque limit value; The torque estimating module is used for estimating the transmission torque acquired by the power takeoff from the driving motor based on a preset torque distribution ratio and the actual output torque; the torque detection module is used for detecting whether the transmission torque is larger than the maximum allowable input torque; A second torque distribution module configured to limit the transmission torque to the maximum allowable input torque if the transmission torque is detected to be greater than the maximum allowable input torque; And the first torque distribution module is used for distributing the actual output torque to the transmission shaft of the vehicle and the power takeoff based on the torque distribution ratio if the transmission torque is detected to be smaller than or equal to the maximum allowable input torque.
8. A vehicle power take-off control apparatus comprising a memory, a processor, the memory storing a vehicle power take-off control program executable on the processor, the vehicle power take-off control program when executed by the processor implementing the steps of the vehicle power take-off control method according to any one of claims 1 to 6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a vehicle power take-off control program which, when executed by a processor, implements the steps of the vehicle power take-off control method according to any one of claims 1 to 6.

Description

Vehicle power take-off control method, device, equipment and storage medium Technical Field The invention belongs to the technical field of automobile power take-off, and particularly relates to a vehicle power take-off control method and device, vehicle power take-off control equipment and a storage medium. Background With the rapid development of technology, in order to meet the operation and use requirements of the upper equipment of the vehicle, a power takeoff is applied to the vehicle, and power is obtained from a power system and transmitted to other upper equipment. At present, when the pure electric special vehicle performs power taking operation in a parking state, power generated by a vehicle motor is completely transmitted to a power takeoff so as to enable the upper equipment to perform fixed-rotation-speed operation through the power output of the power takeoff, and when the pure electric special vehicle performs power taking operation in a driving state, if the power generated by the vehicle motor is completely transmitted to the power takeoff, the driving power performance of the vehicle cannot be ensured. In addition, when the upper mounting equipment carries out fixed rotation speed operation, the rotation speed of the vehicle driving motor is limited, the torque is not limited, the actual output torque of the motor can exceed the maximum allowable output torque of the power takeoff, and if the actual torque transmitted to the power takeoff by the motor is longer than the maximum allowable input torque of the power takeoff, the power takeoff and power transmission parts such as upper mounting and the like can be damaged, so that the safety of the power takeoff of the vehicle is affected. Disclosure of Invention The invention mainly aims to provide a vehicle power take-off control method, a vehicle power take-off control device and a storage medium. The safety of the parking power take-off and the dynamic performance of the driving power take-off of the vehicle are guaranteed. In order to achieve the above object, the present invention provides a vehicle power take-off control method applied to a vehicle power take-off system including a power take-off and a driving motor, the vehicle power take-off control method including the steps of: detecting the current gear of the vehicle after receiving a power take-off request signal; If the current gear of the vehicle is detected to be neutral, taking the maximum allowable input torque of the power takeoff as a torque limit value of the driving motor; if the current gear of the vehicle is detected to be the forward gear, taking the peak torque of the driving motor as the torque limit value; and controlling the actual output torque of the driving motor when the power taking operation is performed based on the torque limit value, wherein the actual output torque does not exceed the torque limit value at maximum. Optionally, after the step of detecting that the current gear of the vehicle is neutral, the method further includes: If the current running speed of the vehicle is smaller than or equal to the preset running speed, the power take-off request switch of the vehicle is in a closed state and the hand brake of the vehicle is in a pulled state, the electromagnetic valve of the power take-off device is controlled to be closed so as to perform power take-off operation, wherein the power take-off request switch is used for feeding back the power take-off intention of a user. Optionally, after the step of detecting that the gear in which the vehicle is currently located is a forward gear, the method further includes: And if the power take-off request switch of the vehicle is in a closed state and the hand brake of the vehicle is in a put-down state, controlling the electromagnetic valve of the power take-off device to be closed so as to take-off. Optionally, before the step of taking the maximum allowable input torque of the power take-off as the torque limit value of the driving motor, the method further includes: and calculating the maximum allowable input torque of the power takeoff based on the maximum allowable output torque of the power takeoff and the power takeoff speed ratio. Optionally, after the step of controlling the actual output torque of the driving motor when taking force based on the torque limit value, the method further includes: And distributing the actual output torque to a transmission shaft of the vehicle and the power takeoff based on a preset torque distribution ratio, wherein the transmission shaft is used for providing driving power for the vehicle. Optionally, before the step of distributing the actual output torque to the propeller shaft of the vehicle and the power take-off based on a preset torque distribution ratio, the method further includes: acquiring a transmission speed ratio corresponding to a forward gear where the vehicle is currently located; and taking the ratio of the transmission speed ratio to the power t