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Torque distribution method and system of four-wheel drive vehicle and vehicle

A torque distribution and vehicle technology, which is applied in the automotive field, can solve problems affecting vehicle stability and safety, vehicle skidding, etc., and achieve the effects of avoiding slipping and instability, improving safety, and improving stability

Inactive Publication Date: 2018-11-13
GREAT WALL MOTOR CO LTD
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Problems solved by technology

[0003] The four-wheel drive function in the new energy hybrid electric vehicle is realized by adjusting the torque output of the engine and the rear axle drive motor. In related technologies, the torque distribution method of the front and rear axles is a fixed torque distribution method, that is, when the vehicle is driving During the process, according to variables such as pedal opening, steering wheel angle, slope, and target torque, according to a certain distribution principle, the torque distribution of the front and rear axles is controlled at a fixed ratio, so that the vehicle will slip again, affecting the stability and stability of the vehicle. safety

Method used

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  • Torque distribution method and system of four-wheel drive vehicle and vehicle
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  • Torque distribution method and system of four-wheel drive vehicle and vehicle

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0032] figure 1 It is a flowchart of a torque distribution method for a four-wheel drive vehicle according to an embodiment of the present invention.

[0033] Such as figure 1 As shown, the torque distribution method of a four-wheel drive vehicle according to an embodiment of the present invention, wherein the vehicle refers to a hybrid vehicle, that is, a four-zone hybrid vehicle driven by an engine and a drive motor, for example: the front wheels are driven by The engine drives, and the rear wheels are driven by a drive motor. The torque distribution method of the four-wheel drive vehicle of the embodiment of the present invention comprises the following steps:

[0034] S101: Detec...

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Abstract

The invention provides a torque distribution method and system of a four-wheel drive vehicle and a vehicle. The torque distribution method of the four-wheel drive vehicle includes the following stepsthat a vehicle speed, a front wheel speed and a rear wheel speed are detected; a front axle slip ratio is obtained according to the road surface adhesion coefficient, the vehicle speed and the front wheel speed, and a rear axle slip ratio is obtained according to the road surface adhesion coefficient, the vehicle speed and the rear wheel speed; and an initial front and rear axle torque distribution ratio is adjusted according to the demand torque, the front axle slip ratio and the rear axle slip ratio to avoid vehicle slipping. The torque distribution method of the four-wheel drive vehicle caneffectively avoid wheel slipping and improve the dynamic property of the vehicle, thereby improving the stability and safety of the vehicle.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a torque distribution method, system and vehicle of a four-wheel drive vehicle. Background technique [0002] Front and rear axle torque distribution is rarely used in hybrid electric vehicles (new energy hybrid electric vehicles). It can improve the driving performance of the vehicle by controlling the torque distribution between the front and rear axles, improve the power performance of the hybrid electric vehicle under different working conditions, and enable the vehicle to Stable through various road conditions. [0003] The four-wheel drive function in the new energy hybrid electric vehicle is realized by adjusting the torque output of the engine and the rear axle drive motor. In related technologies, the torque distribution method of the front and rear axles is a fixed torque distribution method, that is, when the vehicle is driving During the process, according to var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/02B60W40/064B60W40/105
CPCB60W30/02B60W40/064B60W40/105
Inventor 王元李金妍刘秀李岩翁浩宇邢鹏飞梁金明田福刚张健康
Owner GREAT WALL MOTOR CO LTD
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