Halt control method and system of hybrid power vehicle

Abstract

The invention discloses a halt control method and system of a hybrid power vehicle. The halt control method comprises the steps of: judging a reversal-preventing control entry condition; if according with the reversal-preventing control entry condition, controlling an engine to prevent from reversing, wherein the control step comprises the procedures of detecting in real time to obtain an engine rotating speed signal of reflecting a rotating speed of an engine; comparing the rotating speed signal of the engine with a preset ideal rotating speed of the engine to obtain a rotating speed difference; calculating the rotating speed difference through a PID controller to obtain a theoretical target motor output torque, calculating according to the theoretical target motor output torque to obtain an actual target motor output torque needing being implemented by a motor, sending a command for implementing the actual target motor output torque to the motor; and implementing the actual target motor output torque by the motor, and acting the torque implemented by the motor to the engine. Therefore, the reversal of the engine before automatic halt can be prevented.

Description

technical field [0001] The present invention relates to hybrid electric vehicle engine start / stop control, in particular to a hybrid electric vehicle shutdown control method and system. Background technique [0002] One of the advantages of a hybrid vehicle over a traditional vehicle is that it can automatically stop the vehicle when it is idling, thereby reducing fuel consumption and emissions. The automatic shutdown function refers to the system controlling the engine to shut down when the signals such as the car gear position, vehicle speed, brake pedal, and battery status meet the conditions. And when the engine needs to be restarted, the engine starts to inject fuel when the motor drives the engine to a certain speed. [0003] For example, Chinese Invention Patent Application Publication No. CN1986307A discloses an engine start-stop control method for a hybrid electric vehicle. When the engine coolant temperature is higher than the predetermined set value, the vehicle...

AI Technical Summary

Problems solved by technology

This device and method is actually only a means of correction after the event, and cannot prevent the phenomenon of engine reversal in advance, and cannot really avoid the reverse of the engine from the source. Therefore, there are still defects

Images