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Control method and device for inhibiting front wheel slippage of four-wheel drive vehicle and four-wheel drive power vehicle

A control method and technology of a control device, applied in the field of power vehicles, can solve problems such as the inability of the vehicle to get out of trouble and the power output of the engine is weakened, so as to reduce the risk of overheating, improve the passability and power, and reduce the speed difference between the front and rear axles.

Active Publication Date: 2020-02-11
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method reduces the torque of the engine. Although the slippage is suppressed, the vehicle may not be able to get out of trouble due to the weakened power output of the engine.

Method used

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  • Control method and device for inhibiting front wheel slippage of four-wheel drive vehicle and four-wheel drive power vehicle
  • Control method and device for inhibiting front wheel slippage of four-wheel drive vehicle and four-wheel drive power vehicle
  • Control method and device for inhibiting front wheel slippage of four-wheel drive vehicle and four-wheel drive power vehicle

Examples

Experimental program
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Embodiment 1

[0063] Based on Embodiment 1 of the present invention, Embodiment 2 of the present invention provides a control device for suppressing front wheel slippage of a four-wheel drive vehicle, such as image 3 As shown, the control device includes a slip rate monitoring calculation module 31, a judgment module 32, a braking request module 33, and a torque adjustment module 34, wherein:

[0064] The slip ratio monitoring calculation module 31 is used for real-time monitoring of the wheel speed of each wheel of the front axle and the vehicle running speed when the vehicle is running, and calculates the wheel speed of each wheel of the front axle according to the wheel speed of each wheel of the front axle and the vehicle running speed. slip rate;

[0065] The judging module 32 is used to judge whether the slip ratio of each wheel of the front axle is greater than a preset reference slip ratio;

[0066] The braking request module 33 is used to send a braking request signal to the vehi...

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Abstract

The invention provides a control method and device for inhibiting front wheel slippage of a four-wheel drive vehicle and the four-wheel drive power vehicle. The method comprises the following steps ofS1, monitoring and obtaining the wheel speed of each wheel of a front axle and the vehicle running speed in real time when the vehicle runs, and calculating the slippage rate of each wheel of the front axle according to the wheel speed of each wheel of the front axle and the vehicle running speed; S2, judging whether the slippage rate of each wheel of the front axle is greater than a reference slippage rate, executing S3 when the slippage rate of only one wheel of the front axle is greater than the reference slippage rate, and executing S3 and S4 simultaneously when the slippage rates of at least two wheels of the front axle are greater than the reference slippage rate; S3, requesting an ESP to apply braking force to the wheels of the front axle with the slippage rate exceeding the reference slippage rate; and S4, controlling the torque transmitted by a rear axle of the vehicle to increase. When the vehicle slips seriously, front wheel slippage is inhibited by braking the front wheelsand controlling the torque transmission ratio of the rear axle, the vehicle dynamic property is improved, and a whole transmission system is protected.

Description

technical field [0001] The invention relates to the technical field of power vehicles, in particular to a control method, device and vehicle for suppressing front wheel slip of a four-wheel drive vehicle. Background technique [0002] The intelligent timely four-wheel drive system is generally used in SUVs with horizontally arranged engines and front-wheel drive. It can transmit more torque to the rear axle on off-road roads, improve the off-road performance of the vehicle, and at the same time reduce the transmission torque of the rear axle to improve fuel consumption when driving at high speeds. Economical, it is widely used in mainstream SUVs at present. [0003] At present, more and more vehicles have been equipped with driving anti-skid systems. From the perspective of vehicle driving, it is very important to suppress the violent slipping of the driving wheels. For example, the patent application with publication number CN104828068A discloses a four-wheel drive hybrid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60W10/119B60W10/184
CPCB60W10/119B60W10/184B60W30/18172B60W2520/10B60W2520/28
Inventor 丁超徐伟黄亮韩领涛
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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