Method and device for starting a hybrid vehicle engine

Abstract

The invention discloses a starting control method and a device for a hybrid vehicle engine. When a vehicle enters a driving state, an air conditioner compressor works and an engine does not work, a motor is used to start the engine preferentially in a reversed manner by judging whether the engine is off, whether the gear is neutral, and whether the motor speed is reasonable. Only when the gear isneutral and the backward dragging condition is not satisfied, the starting mode of the starter can be chosen to start the engine, thereby realizing the function of opening the air conditioner to startthe engine. The chance of the starter starting the engine is greatly reduced, the frequent starting of the starter is avoided, the starter and parts thereof are effectively protected, and at the sametime, when the temperature in the car meets the set temperature, the starting and stopping function of the engine can function normally, thus fuel consumption is reduced to a certain extent and economy of the vehicle is improved.

Description

technical field [0001] The present invention relates to the technical field of hybrid electric vehicles, and more specifically, to a method and device for controlling the starting of a hybrid electric vehicle engine. Background technique [0002] At present, there are more and more new energy buses with hybrid systems on the market. Compared with traditional vehicles, the structural difference of hybrid vehicles lies in the addition of components such as motors and batteries, so hybrid vehicles have the function of idling start and stop. . [0003] When the idling start-stop function is turned on, if the vehicle is driven in pure electric mode, and the switch on the air-conditioning panel is pressed, once the temperature inside the vehicle reaches the set temperature, the air-conditioning compressor will stop working, the working state of the air-conditioning compressor will be reset, and the air-conditioning compressor will be started. The stop function works and the engin...

AI Technical Summary

Problems solved by technology

The air-conditioning compressor of the air-conditioning system will work intermittently according to the temperature inside the car, which causes the starter to start the engine frequently, which greatly increases the speed of damage to the starter and its components

[0004] And if the engine idle start-stop function is turned off, the engine will not stop, and the air-conditioning compressor can work intermittently with the temperature change in the car, but the disadvantage is that the idle start-stop function is cancelled, the fuel consumption of the power system will be greatly increased, and the vehicle economy will be greatly reduced. performance, the competitiveness of the vehicle is greatly reduced

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