Control method and system for improving trafficability of whole vehicle

Abstract

The invention provides a control method for improving the trafficability of a whole vehicle. The control method comprises the steps that the vehicle speed of the vehicle and the wheel speeds of four wheels are obtained; if the vehicle speed is larger than or equal to the preset vehicle speed threshold value, the slipping state of the vehicle is determined according to the wheel speeds of the four wheels; wherein the slipping state of the vehicle is one of slipping of at least one wheel of the front axle and no wheel of the rear axle, slipping of at least one wheel of the rear axle and no wheel of the front axle, simultaneous wheel slipping of the front axle and the rear axle and frequent alternate wheel slipping of the front axle and the rear axle; the depth of an accelerator pedal is obtained, and the vehicle speed is combined to obtain the whole vehicle target demand torque of the vehicle; and according to the current slipping state of the vehicle, front and rear axle torque distribution is conducted on the target demand torque of the whole vehicle, so that the trafficability of the whole vehicle is improved. By implementing the method, the torque of the front axle and the rear axle can be redistributed by replacing accurate control of a driver with a technical means, so that the purpose of easily getting out of trouble of the vehicle is achieved, and the whole vehicle trafficability of the vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a control method and system for improving the passability of a complete vehicle. Background technique [0002] Most of the four-wheel drive systems of traditional fuel vehicles use intelligent torque distribution transmission systems. The system can only distribute the torque of the front and rear axles at discrete proportional points, and when a single-axle wheel slips, the torque distribution cannot be precisely controlled, making the other wheel easy to follow and slipping, resulting in the vehicle's passing ability being unable to exert its full potential. come out. In order to improve the passing ability of the whole vehicle, the common method of traditional fuel vehicles is to add a differential lock device on the single axle and between axles, but this method requires the driver to manually set the opening and closing, which not only requires high skills of the...

AI Technical Summary

Problems solved by technology

However, this part of the reduced torque will be lost, making the vehicle unable to exert the vehicle passing ability, and even the single-axle wheel or the double-axle wheel keeps slipping and cannot get out of trouble (especially the electric car driven by a single motor)

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