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An electric vehicle torque control method, device and vehicle

A torque control, electric vehicle technology, applied in the field of vehicles, can solve the problems of complex control logic and high hardware cost

Active Publication Date: 2021-07-06
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the ESP system needs to cooperate with various sensors, vacuum boosters, pipelines and brakes, hydraulic regulators and other actuators. The entire control logic is more complicated and the hardware cost is higher.

Method used

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  • An electric vehicle torque control method, device and vehicle
  • An electric vehicle torque control method, device and vehicle
  • An electric vehicle torque control method, device and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] refer to figure 1 , the present invention provides a kind of electric vehicle torque control method, described method comprises:

[0046] Step 101, monitoring whether the working condition of the motor satisfies the slipping condition, wherein the slipping condition is that the acceleration of the motor is greater than a preset threshold, and the duration is longer than the preset duration;

[0047] Specifically, generally speaking, the existing ESP system collects the wheel speed of the wheels and the current vehicle speed through various sensors arranged on the vehicle, and judges whether the vehicle is in a slipping state by comparing and calculating the slip rate of the vehicle. In this application, however, the slip condition is preset, and the determination of the vehicle slip state needs to meet the following conditions at the same time: the acceleration of the motor is greater than the preset threshold, and the duration is longer than the preset duration. The p...

Embodiment 2

[0062] refer to figure 2 , the present invention provides yet another electric vehicle torque control method, the method comprising:

[0063] Step 201, monitoring whether the working condition of the motor satisfies the slipping condition, wherein the slipping condition is that the acceleration of the motor is greater than a preset threshold, and the duration is longer than the preset duration;

[0064] Specifically, generally speaking, the existing ESP system collects the wheel speed of the wheels and the current vehicle speed through various sensors arranged on the vehicle, and judges whether the vehicle is in a slipping state by comparing and calculating the slip rate of the vehicle. In this application, however, the slip condition is preset, and the determination of the vehicle slip state needs to meet the following conditions at the same time: the acceleration of the motor is greater than the preset threshold, and the duration is longer than the preset duration. The pre...

Embodiment 3

[0088] refer to image 3 , the invention provides a torque control device for an electric vehicle, said device comprising:

[0089] The working condition monitoring module 301 is used to monitor whether the working condition of the motor meets the slipping condition, wherein the slipping condition is that the acceleration of the motor is greater than a preset threshold, and the duration is longer than the preset duration;

[0090] The first acquisition module 302 is used to obtain the target torque according to the product of the torque limit coefficient and the motor output torque to control the torque if the slip condition is met, wherein the torque limit coefficient includes the first torque limit corresponding to the acceleration of the motor coefficient, and the second torque limiting coefficient corresponding to the vehicle speed.

[0091] An electric vehicle torque control device according to the present invention monitors the acceleration and time of motor operation, ...

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PUM

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Abstract

The invention provides a torque control method, device and vehicle of an electric vehicle. The method includes: monitoring whether the working condition of the motor satisfies the slipping condition, wherein the slipping condition is that the acceleration of the motor is greater than a preset threshold and the duration is longer than Preset duration; if the slipping condition is met, the target torque is obtained according to the product of the torque limiting coefficient and the output torque of the motor to control the torque, wherein the torque limiting coefficient includes the first torque limiting coefficient corresponding to the acceleration of the motor, and the corresponding The second torque limit coefficient of vehicle speed. A torque control method and device for an electric vehicle according to the present invention, by monitoring the acceleration and time of motor operation, when it is judged that the vehicle is in a slipping state, the motor system is controlled to reduce the output torque to prevent slipping, thereby reducing the The complexity of the control logic is reduced, and a large number of execution devices are not required, which reduces the hardware cost.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an electric vehicle torque control method, device and vehicle. Background technique [0002] With the advancement of drive technology, the prevention of skidding of automobiles has attracted increasing attention from all parties. [0003] At present, the TCS (Traction Control System, Traction Control System) function of the ESP (Electronic Stability Program, Electronic Stability Program) system is usually configured for the car, and the slip rate is calculated by comparing the wheel speed with the vehicle speed, and then the vehicle slip is judged. Adjust the output torque of the engine and the braking force on the drive wheels to achieve anti-skid. [0004] However, the ESP system needs to cooperate with various sensors and actuators such as vacuum boosters, pipelines and brakes, and hydraulic regulators. The entire control logic is relatively complicated and the hardware cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/12Y02T10/72
Inventor 冯小刚冯子鹏岳志芹翁浩宇支行常云龙
Owner GREAT WALL MOTOR CO LTD