New energy four-wheel drive vehicle front and rear axle torque distribution method, system and related components

Abstract

The invention discloses a front and rear axle torque distribution method of a new energy four-wheel drive vehicle, which comprises the following steps of detecting the running states of a front motorand a rear motor to obtain motor state parameters; The driving state parameters are determined according to the road surface adhesion coefficient and vehicle driving parameters of the obtained new energy four-wheel drive vehicle driving area; Determining the current demand state according to the motor state parameter and the driving state parameter, and outputting the front and rear axle torque proportion corresponding to the current demand state; The front motor controller and the rear motor controller send control commands corresponding to the front and rear axle torque ratios to control thefront motor and the rear motor to output corresponding torques according to the front and rear axle torque ratios. The method can reasonably adjust the torque distribution ratio of the front axle andthe rear axle according to the actual driving condition of the new energy four-wheel drive vehicle. The invention also discloses a front and rear axle torque distribution system of a new energy four-wheel-drive vehicle, a computer-readable storage medium and a new energy four-wheel-drive vehicle, which have the above beneficial effects.

Description

technical field [0001] The invention relates to the field of new energy vehicle control, in particular to a front and rear axle torque distribution method and system of a new energy four-wheel drive vehicle, a computer-readable storage medium and a new energy four-wheel drive vehicle. Background technique [0002] In the current environment where the regulations on vehicle fuel consumption and emission are becoming more and more stringent in various countries around the world, pure electric vehicles have the advantages of energy saving, high efficiency and zero emission. Therefore, many countries are currently committed to promoting the research and development and marketization of pure electric vehicles. [0003] Four-wheel drive vehicles can provide more powerful power than two-wheel drive vehicles. On slippery roads and non-paved roads, four-wheel drive vehicles have higher passability and stronger ability to get out of trouble than two-wheel drive vehicles. The new ener...

AI Technical Summary

Problems solved by technology

[0004] However, since the torque distribution method of front and rear axles of four-wheel drive vehicles needs to consider different terrains and driving conditions, and the configuration of new energy four-wheel drive vehicles is different from that of traditional four-wheel drive vehicles, the torque distribution control of front and rear axles of new energy four-wheel drive vehicles is currently technology is still one of the difficulties in vehicle control technology

Different terrains, different road surface adhesion coefficients, different vehicle motion states, and different driving operations of the driver have different requirements for the optimal motion state of the vehicle. For example, to fully exert the power of a new energy four-wheel drive vehicle requires the maximum drive of both the front and rear axles. ability, while the vehicle needs to adjust or even reduce the torque of the front and rear axles in real time on curves or slippery roads, coupled with the nonlinear characteristics of the vehicle system and the requirements for the energy efficiency of the vehicle, the power and economy of the new energy four-wheel drive vehicle The coordinated control of performance and handling stability has always been a difficult point in the vehicle four-wheel drive torque distribution technology. At present, there is no perfect solution for the torque distribution control technology of the front and rear axles of new energy four-wheel drive vehicles.

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