Vehicle torque control method and system and vehicle

Abstract

The invention provides a vehicle torque control method and system and a vehicle. The vehicle torque control method comprises the steps of obtaining front and rear axle loads, vehicle running parameterand demand torque of the vehicle; obtaining initial distributed torques of a front axle and a rear axle of the vehicle according to the front and rear axle loads, vehicle running parameter and demandtorque of the vehicle; obtaining a theoretical ground adhesion coefficient according to the initial distributed torques of the front axle and the rear axle of the vehicle and the front and rear axleloads of the vehicle; judging whether the theoretical ground adhesion coefficient is larger than an actual ground adhesion coefficient or not; and if so, adjusting the initial distributed torques of the front axle and the rear axle according to the actual ground adhesion coefficient to obtain final distributed torques of the front axle and the rear axle of the vehicle; and controlling the vehicleaccording to the final distributed torques of the front axle and the rear axle of the vehicle. According to the vehicle torque control method, by using the adhesion coefficients between tires and theground, the adhesion rates between the tires and the ground are reduced under the same vehicle torque requirement and the wheel slip probability is reduced so that the driving experience is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle torque control method, system and vehicle. Background technique [0002] At present, the torque distribution method of the front and rear axles of the vehicle is mainly a fixed torque distribution method. During the driving process of the vehicle, according to variables such as vehicle speed, slope, steering wheel angle, and target torque, according to certain rules, the torque distribution of the front and rear axles is controlled in a fixed proportional step-by-step manner. Most of the four-wheel drive systems in our country are part-time four-wheel drive with mechanical transfer case. This system is the simplest way of four-wheel drive system, but the operation is complicated, and the four-wheel drive mode cannot be used on hard ground. Contents of the invention [0003] In view of this, the present invention aims to propose a method for controlling vehicle to...

AI Technical Summary

Problems solved by technology

Most of the four-wheel drive systems in our country are time-sharing four-wheel drive with mechanical transfer case. This system is the simplest way of four-wheel drive system, but the operation is complicated, and the four-wheel drive mode cannot be used on hard ground.

Images