Control method for quick starting of engine of hybrid electric vehicle

Abstract

The invention discloses a control method for quick starting of an engine of a hybrid electric vehicle. According to the method, the driving mode is firstly selected to be the ECO mode or the SPORT mode, then an engine starting instruction is given for starting, during starting, the starting torque of a high-voltage generator is adjusted firstly until the rotating speed of the engine is in the expected rotating speed range, when normal oil injection of the engine is realized, the high-voltage generator is switched from the electric mode to the generation mode, and meanwhile, an electric energycompensation mechanism is triggered, so that electric energy consumed by the high-voltage generator during quick starting is quickly compensated, and the over-discharge fault of a battery is avoided until the high-voltage generator enters the normal generation working state, and quick starting is completed at the moment. By the aid of the design, on the basis that the driving intention of a driverand real-time working conditions of the vehicle are identified effectively, quick starting of the engine can be realized, the ultimate power requirement can be met, and failure of a high-voltage power system and mechanical power components can be avoided.

Description

technical field [0001] The invention relates to a method for starting an engine, and belongs to the technical field of hybrid electric vehicle control, in particular to a control method for fast starting of a hybrid electric vehicle engine. Background technique [0002] The existing pure electric vehicles and plug-in hybrid electric vehicles are limited by the incompleteness of the charging facilities, which leads to the inability of the vehicle energy management system to effectively control the power of the high-voltage battery, which brings anxiety about the driving range and loss of high-voltage power batteries. In the electric state, the power performance of the vehicle is obviously attenuated and other problems. The hybrid electric vehicle that uses the engine as a range-extending device uses petroleum fuel as the energy source of the whole vehicle, which can solve the problem of driving range anxiety of pure electric vehicles, and can control the working state of the ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art that the engine cannot be quickly started on the basis of effectively identifying the driver's driving intention and the real-time operating conditions of the vehicle, and cannot adapt to the limit power demand, and provides a vehicle that can effectively A control method for quickly starting the engine of a hybrid electric vehicle capable of adapting to extreme power demands based on identifying the driving intention of the driver and the real-time operating conditions of the vehicle

Images