Four-wheel driven hybrid vehicle driving system and driving management method thereof

Abstract

The invention provides a four-wheel driven hybrid vehicle driving system capable of meeting the needs of a motor vehicle for torque during running in an urban area and reducing oil consumption and tail gas emission and a driving management method thereof. The driving system comprises an engine driving front wheels, an ISG motor coaxially arranged with the engine and a driving motor driving rear wheels, wherein the engine is connected with an engine management unit; the ISG motor is connected with an ISG motor control unit; the driving motor is connected with the motor control unit; and the ISG motor and the driving motor are connected with a high voltage battery through an inversion unit. The key point is that the driving system also comprises a vehicle control unit and a high voltage management unit connected with the high voltage battery. The vehicle control unit, the high voltage management unit, the engine management unit, the ISG motor control unit and the motor control unit are connected through CAN buses; and the vehicle control unit is also connected with an accelerator pedal position sensor and a vehicle speed sensor.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle manufacturing, and in particular relates to a driving system and a driving management method of a four-wheel drive hybrid electric vehicle. Background technique [0002] Today, automobile fuel consumption and emission problems have become two major themes that affect the development of the automobile industry, especially for four-wheel drive vehicles. Great economic burden, but also pollute the environment. In order to save energy and improve the environment, four-wheel drive hybrid vehicles have become a direction of people's research and development. It can achieve the purpose of saving fuel, reducing emissions and environmental protection. It not only has the advantages of fuel saving and environmental protection of electric vehicles, but also has the convenience of refueling like ordinary cars , no mileage limit. [0003] Existing four-wheel drive hybrid vehicles generally us...

AI Technical Summary

Problems solved by technology

Although this driving method can meet the power requirements, and the vehicle economy and emission performance are also better than traditional four-wheel drive vehicles, it also has some disadvantages. For example, when driving in urban areas, traffic jams and traffic lights are often encountered. At this time, if only the pure electric mode is used to drive, it is difficult to meet the instantaneous torque demand of the car during rapid acceleration, and once the power battery SOC is too low, the pure electric driving mode will not be able to start, so the whole vehicle can only be driven by the engine, resulting in Fuel saving and emission reduction are not obvious

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