A kind of automobile four-wheel drive control system and method

Abstract

The invention provides an automobile four-wheel drive control system and a method. The automobile four-wheel drive control system comprises an input module, a torque division module, a stabilization module, a slip control module and an output module. The input module is used for acquiring the driving parameter information of an automobile, and the driving parameter information comprises at least one of a yaw velocity m, a lateral acceleration n and a wheel speed difference k. The torque division module is used for determining an initial output torque N1. The stabilization module is used for determining a first correction torque N2 according to the driving parameter information. The slip control module is used for determining a second correction torque N3 according to the driving parameterinformation. The output module is used to output the larger value of the sum of N1 and N2 as well as N3 as the target output torque. The automobile four-wheel drive control system is advantageous in that by adopting the more diverse driving parameter information, the stabilization module is used for correcting the torque division module in order to improve the operation stability of the whole automobile, and the slip control module is used for solving the problems of jitter and abnormal sounds of the automobile of under complicated road conditions.

Description

technical field [0001] The invention relates to the field of four-wheel-drive vehicle control, in particular to a vehicle four-wheel-drive control system and method. Background technique [0002] The four-wheel drive system of automobiles has a long history. Compared with two-wheel drive vehicles, four-wheel drive vehicles can transmit power to all wheels, maximize road adhesion, and improve vehicle acceleration, passability, and handling. The current common four-wheel drive The system is a timely four-wheel drive system, and its core technology is to receive real-time signals such as vehicle speed, wheel speed, and throttle opening through the Controller Area Network (CAN), and judge the vehicle's driving status according to the vehicle model, thereby Match the optimal four-wheel drive output torque in real time, so that the vehicle can get the best four-wheel drive performance. [0003] At present, in vehicles with timely four-wheel drive systems, the driving status of th...

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Problems solved by technology

[0005] In view of this, the present invention aims to propose an automobile four-wheel drive control system and method to solve the problem that the automobile in the prior art cannot judge more complicated vehicle driving conditions only through the three signals of throttle opening, vehicle speed, and steering angle. State and road condition requirements, resulting in a poor torque correction effect on the four-wheel drive system

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