Gear shifting control method of P2 hybrid vehicle

Abstract

The invention relates to the technical field of vehicle control, and particularly discloses a gear shifting control method of a P2 hybrid vehicle. According to the gear shifting control method of a P2hybrid vehicle, when the vehicle shifts a gear, an engine adjusts a rotating speed, meanwhile, a power motor reduces a torque, and a gearbox is out of gear and selects the gear to a target gear; power interruption time in a gear shifting process is reduced; and clutch wear is reduced, the engine actively adjusts the speed in the gear selecting process of the gearbox, then the clutch is quickly combined to synchronize the rotating speed of a first shaft of the gearbox to a rotating speed value of the target gear within an extremely short time, a rotating speed difference between the first shaft and the output shaft of the gearbox in a gear engaging process and an impact on a gear wheel in the gearbox in the gear engaging process are reduced, and vehicle gear shifting smoothness is improved.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a gear shift control method for a P2 hybrid vehicle. Background technique [0002] With the rapid development of the automobile industry, "energy saving" and "emission reduction" have become the main theme of the development of the automobile industry. As an intermediate product of the transition from traditional power to new energy power, the hybrid power system has outstanding energy-saving effects, while taking into account the convenience of use and driver habits, and has become an important technical solution for the current development of automobiles. According to its working principle, the hybrid power system can be divided into series type, parallel type, and hybrid type. Among them, the parallel type hybrid power can realize the independent and combined drive of the engine and the power motor, improve the dynamic performance of the system, and at the same time...

AI Technical Summary

Problems solved by technology

[0003] The traditional P2 hybrid vehicle matched with a mechanical automatic transmission includes several steps such as power system torque reduction, clutch separation, gear removal, speed synchronization, gear selection, gear engagement, clutch engagement, and torque boost during the gear shifting process. , in the process of shifting, each step is usually executed in series, and the torque of the engine and the power motor is not decoupled at the same time, resulting in long power interruption time, clutch wear, and poor ride comfort during the shifting process.

Images