Engine starting control based on motor speed regulation

Abstract

The invention discloses engine starting control based on motor speed regulation. The engine starting control comprises starting control of an engine under a static working condition and a dynamic working condition, through the engine starting control based on the motor speed regulation, the motor and the engine are dragged alternately and mutually, and the torque and/or the rotating speed of the motor and the engine are adjusted, so that the rotating speed and the torque of the motor and the engine are coupled, and the engine starting control comprises a motor starting acceleration stage, an engine ignition acceleration stage, an engine rotating speed coupling stage, an engine torque coupling stage and a coupling-to-charging torque stage. According to the engine starting control method based on motor speed regulation, the starting time of the engine is short, the response is controllable, the reliability and accuracy of engine starting are improved, the starting control robustness is good, and the smoothness is controllable through calibration.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to an engine start-up control based on motor speed regulation. Background technique [0002] Based on the P2 configuration or a similar hybrid configuration, it includes a K0 clutch, a motor and an engine. The power of the engine and the motor are coupled via the K0 clutch, and then transmitted to the transmission by a dual clutch or transmitted to the wheel end by other electromechanical coupling devices. and drive the wheels. When starting the engine, what needs to be achieved is the coupling of the speed of the K0 clutch, motor and engine, and the common way to achieve this is to accelerate the speed to exceed the target idle speed, and then let the speed drop to achieve coupling. [0003] At present, the commonly used engine starting method is: the motor starts first and drives the engine speed to increase, and then the engine ignites and injects fuel to increase its...

AI Technical Summary

Problems solved by technology

Although this engine starting method can make the engine start normally, but in the process of reducing the engine speed, it can only rely on the inertia of the engine itself to reduce the speed or adjust the torque of the engine itself, instead of using the clutch K0 during overshoot The negative torque of the motor reduces the engine speed, the control effect on the engine speed is not good, the control robustness is poor, and it is easy to cause engine vibration and noise, which affects the riding experience

Images