Hybrid electric vehicle and control method for eliminating starting jitter

Abstract

The invention discloses a hybrid electric vehicle and a control method for eliminating starting jitter, and belongs to the technical field of hybrid electric vehicles. The hybrid electric vehicle comprises a motor, an engine and a whole vehicle controller, wherein the engine is started by the motor to reach a target rotating speed so as to carry out oil injection ignition, the vehicle control unit is in control connection with the motor, and the engine comprises an air inlet manifold, one end of which is connected with a throttle valve; a vacuum tank which is connected with the air inlet manifold, wherein an electromagnetic valve is connected to the vacuum tank and used for opening or closing the vacuum tank, and the electromagnetic valve is in control connection with the whole vehicle controller; a cylinder body which is connected to the other end of the air inlet manifold, wherein a piston is arranged in the cylinder body, and the piston can perform compression stroke between an upper dead center and a lower dead center of the piston; and an engine management system which is in control connection with the throttle valve, wherein the engine management system is in communication connection with the whole vehicle controller. The hybrid electric vehicle has the beneficial effect that the problem of jitter when the engine is started can be fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a hybrid electric vehicle and a control method for eliminating starting vibration. Background technique [0002] Hybrid electric vehicles are widely developed due to their excellent performance. Among them, in a hybrid vehicle, usually after the motor drags the engine to its target speed, the engine performs fuel injection and ignition, thereby entering a cycle work mode; and the target speed of the engine is compared with the fuel injection speed of the traditional car High, in order to speed up the engine to its target speed, the engine needs to go through several compression strokes before the fuel injection ignites. [0003] Since there is residual air in the intake manifold of the engine, when the piston of the engine moves from the top dead center to the bottom dead center, the air in the intake manifold will be sucked into the cylinder, causing the piston...

AI Technical Summary

Problems solved by technology

[0003] Since there is residual air in the intake manifold of the engine, when the piston of the engine moves from the top dead center to the bottom dead center, the air in the intake manifold will be sucked into the cylinder, causing the piston to move from the bottom dead center When reaching the top dead center, the air pressure in the cylinder is very high, and the large air pressure will cause the vehicle to vibrate when starting, which will affect the driving comfort

[0004] In order to solve the above problems, at present, when the engine of a hybrid vehicle is started, the drive motor is blocked, so that the vibration of the engine cannot be amplified by the mechanical structure such as the gearbox, although it can reduce the vehicle vibration caused by the engine when starting. , to improve the driving comfort of the vehicle; but it only slows down the vibration on the transmission chain of the hybrid vehicle, that is, it can only slow down the transmission of the vibration, and does not fundamentally solve the problem of the engine starting vibration

Images