Electronic all-wheel-drive system for motor vehicle and control method therefor

Abstract

The invention relates to an electronic all-wheel-drive system for a motor vehicle and a control method therefor. The electronic all-wheel-drive system comprises a whole vehicle system, a power control system and an ESP (Electronic Stability Program) module, wherein, the ESP module is connected with the whole vehicle system and the power control system through a whole vehicle CAN (Controller Area Network) bus in a controlling manner; the power control system comprises an engine management system (EMS), a battery management system (BMS), a rear-guard motor controller (TM), A motor control unit (MCU) and a transmission case control unit (TCU); the power control system is used for interacting with the whole vehicle system, acquiring the state information of the whole vehicle system, outputting control commands after judging and processing, and controlling the whole vehicle system to operate; the whole vehicle system comprises a rear-guard motor, a high-tension battery, an ISG (Integrated Starter Generator), an engine and a transmission case.

Description

technical field [0001] The invention belongs to the field of hybrid electric vehicle control, and relates to a system coordination control technology of an electronic four-wheel drive hybrid electric vehicle, in particular to an electronic four-wheel drive system of a motor vehicle and a control method thereof. Background technique [0002] With the further aggravation of energy crisis and environmental deterioration, energy saving and environmental protection have become the themes of modern automobile development. Although traditional four-wheel drive vehicles have better power and off-road performance than conventional two-wheel drive vehicles, their fuel consumption and emissions are relatively high, which can no longer meet the development requirements of modern automobiles for energy saving and emission reduction. Therefore, major automobile manufacturers have begun to compete. Phase development of four-wheel drive hybrid vehicles to replace traditional four-wheel driv...

AI Technical Summary

Problems solved by technology

Although traditional four-wheel drive vehicles have better power and off-road performance than conventional two-wheel drive vehicles, their fuel consumption and emissions are relatively high, which can no longer meet the development requirements of modern automobiles for energy saving and emission reduction. Therefore, major automobile manufacturers have begun to compete. Phase development of four-wheel drive hybrid vehicles to replace traditional four-wheel drive vehicles

[0003] At present, more advanced four-wheel drive hybrid vehicles generally use the engine or the engine and the ISG motor to drive the front wheels, and use the driving motor to drive the rear wheels. However, due to the differences in the steering characteristics of the front-wheel drive, rear-wheel drive and four-wheel drive modes, it is easy to cause oversteer or understeer during the steering process, which affects driving safety.

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