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

Abstract

The invention provides a driving management method for 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. The driving management method of the invention comprises: in a finished automobile controller, taking a position signal of a gas pedal as a demand command of a driver for a vehicle driving moment, obtaining a demand value of the vehicle to power through calculation, and comparing with the maximum torque which can be output by a motor, an ISG motor and a driving motor, selecting a suitable driving mode based on high voltage battery charged information for reference, enabling the vehicle to adopt a power-driven mode as far as possible on the premise that the battery safety electric quantity is ensured and the torque demand is met, reducing oil consumption and exhaust discharging, and avoiding single driving mode incapable of adopting four-wheel driven mode due to power shortage of battery for the traditional four-wheel driven hybrid vehicle which does not consider the battery charged information, thereby avoiding the drawback from unabling to meet the vehicle torque demand and causing oil consumption increasing and aggravation of exhaust discharging.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle manufacturing, and in particular relates to a driving management method of a drive system 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 use ...

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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