Hybrid electric vehicle and its upshift control method and system

Abstract

The invention discloses a hybrid electric vehicle and an upshift control method and system thereof. The hybrid electric vehicle comprises an engine, a power motor, a power battery, a double-clutch transmission and an auxiliary motor connected with the engine, and the upshift control method comprises the following steps that when the double-clutch transmission enters an upshift process, the duration time of an inertia phase stage in the upshift process is obtained; a target torque of the auxiliary motor is obtained according to the duration of the inertia phase stage; and negative torque operation of the auxiliary motor is controlled according to the target torque of the auxiliary motor to improve the reduction rate of the rotating speed of the engine. According to the upshift control method for the hybrid electric vehicle, the upshift time of the hybrid electric vehicle can be effectively shortened, the driving experience of a user is improved, and meanwhile, the service life of a clutch in the dual-clutch transmission can be prolonged.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to an upshift control method of a hybrid electric vehicle, a non-transitory computer-readable storage medium, an upshift control system of a hybrid electric vehicle and a hybrid electric vehicle. Background technique [0002] When a dual-clutch transmission is upshifted with positive torque, the engine speed will decrease in the inertia phase of the upshift to reach the speed corresponding to the target gear. This process is generally achieved through the interaction between the clutch and the engine in the dual-clutch transmission. The duration is relatively long, and users generally feel that the power is weakened. Moreover, during the upshifting process, the slipping work of the clutch in the dual-clutch transmission is relatively large, thereby accelerating the wear of the clutch and reducing the service life of the clutch. Contents of the invention [0003] ...

AI Technical Summary

Problems solved by technology

[0002] When a dual-clutch transmission is upshifted with positive torque, the engine speed will drop in the inertia phase of the upshift to reach the speed corresponding to the target gear. This process is generally achieved through the interaction between the clutch and the engine in the dual-clutch transmission. The duration is relatively long, and users generally feel that the power is weakened

Moreover, during the upshifting process, the slipping work of the clutch in the dual-clutch transmission is relatively large, which will accelerate the wear of the clutch and reduce the service life of the clutch.

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