Hybrid electric vehicle and driving control method and device thereof

Abstract

The invention discloses a driving control method and device of a hybrid electric vehicle and the hybrid electric vehicle. The method comprises the following steps that the current gear of the hybrid electric vehicle, the current electric quantity of a power battery, and the slope of the current road are obtained; if the current gear of the hybrid electric vehicle, the current electric quantity of the power battery, and the slope of the current road meet preset requirements, the current vehicle speed of the hybrid electric vehicle is further obtained; if the current vehicle speed is larger than or equal to a third vehicle speed threshold value and is smaller than a fourth vehicle speed threshold value, the hybrid electric vehicle is controlled to achieve a small load halt function. By means of the driving control method of the hybrid electric vehicle, electricity recycle can be improved, the driving distance of the whole vehicle is increased, economic performance is improved, oil consumption is lowered, and the emission load is reduced.

Description

Technical field [0001] The present invention relates to the technical field of vehicles, in particular to a hybrid electric vehicle and a driving control method and device thereof. Background technique [0002] Most of the traditional fuel vehicles install a special automatic start-stop subsystem to realize the control of the car's coasting start and stop, so as to reduce the fuel waste and air pollution caused by the engine idling. At present, there are three main forms of start-stop systems in automobiles. [0003] ① Separate starter / generator start-stop system: a common start-stop control system. The starter and generator of the system are independently designed, the power required for starting the engine is provided by the starter, and the generator provides electrical energy for the starter. The system includes highly enhanced starters, enhanced batteries (usually AGM batteries), controllable generators, engine ECU (Electronic Control Unit, electronic control unit) with inte...

AI Technical Summary

Problems solved by technology

[0006] The engine will start frequently when the vehicle is driving in congested conditions, which is a huge test for the spark plug and the battery. Although the above-mentioned start-stop control system is smart enough, it will wear the engine to a certain extent and shorten its service life. Vibration and noise are unavoidable and seriously reduce comfort

In addition, the automatic start-stop system is only in the stopped state when the vehicle speed is zero, the engine speed is lower than the specified target speed, the refrigerant is within the specified range, the brake vacuum meets the specified requirements, the air conditioning adjustment requirements are not too high, and it is in a specially designated gear. (such as N or P gear), the brake pedal is stepped on, and the battery power is sufficient for the next start, etc., the start-stop system will work, the engine will automatically turn off, the use conditions are limited, and there are many factors to consider, so that the system components are reliable. Durability requirements are high, and this subsystem also increases the cost of the vehicle

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