Power system of oil-electricity four-drive hybrid electric vehicle and control method thereof

Abstract

The invention relates to a power system of an oil-electricity four-drive hybrid electric vehicle and a control method thereof. The system takes a motor and a dynamo as impendent power sources for driving front driving wheels and rear driving wheels of a vehicle respectively, adopts a motor controller to control the motor to operate, adopts a dynamo controller to control the dynamo to operate, andadopts a whole vehicle controller to control the dynamo controller and the motor controller to operate; according to equipment parameters and operating parameters of the vehicle, the whole vehicle controller determines a drive mode of the vehicle and the switching among different drive modes; and a control mode comprises a self-check mode, a pure motor drive mode, a pure dynamo drive mode, a motor single drive mode, a dynamo single drive mode, a motor-dynamo double-drive mode and a power failure mode. The power system can farthest exert the advantages of the motor and the dynamo, meets requirements under different conditions, and achieves the aims of reducing operating expense, saving energy and protecting environment.

Description

technical field [0001] The invention relates to a power system of an oil-electric four-wheel-drive hybrid vehicle, and also relates to a control method of the power system, which belongs to the hybrid vehicle technology. Background technique [0002] With the increasing demand for environmental protection and the increasing shortage of non-renewable resources such as petroleum, many automobile manufacturers are paying more and more attention to the research and development of energy-saving and emission-reducing models. Various hybrid vehicles are gradually coming out. Under the background of existing technologies, The four-wheel-drive hybrid vehicle can meet the needs of energy and environmental protection to the greatest extent, so it has more market prospects. The configurations of hybrid electric vehicle power systems developed at present include series, parallel and hybrid. Most parallel hybrid electric vehicles mix the power of the internal combustion engine and the el...

AI Technical Summary

Problems solved by technology

Most parallel hybrid electric vehicles mix the power of the internal combustion engine and the electric motor at the input end of the transmission, and output the mixed power of the engine and the electric motor to the drive shaft through the gearbox to drive the front wheels of the vehicle. And the structure of the transmission device is more complex, and the cost of modification and testing is higher

In addition, the main function of the ISG motor, which is commonly used in the drive system of hybrid electric vehicles, is to drive the car forward at a relatively low speed through the motor at the start-up stage, and at the same time drive the engine to start quickly, so this hybrid electric vehicle does not have The driving function driven by a single motor cannot give full play to the driving advantages of the motor and engine under their respective suitable conditions

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