Static gear-shifting control system and method for hybrid electric vehicle

Abstract

The invention provides a static gear-shifting control system and method for a hybrid electric vehicle, and belongs to the technical field of vehicles. The static gear-shifting control system solves the problem that an existing hybrid electric vehicle has larger impact when static gear-shifting is carried out. The static gear-shifting control system for the hybrid electric vehicle comprises a gear-shifting sensor and a first sensor, wherein the gear-shifting sensor is used for receiving gear-shifting signals and sending the gear-shifting signals to a TCU, and the first sensor is used for collecting rotating speed signals of a transmission pre-engaging-gear input shaft and sending the rotating speed signals to a VCU; the TCU sends motor negative rotation speed request signals to the VCU according to the gear-shifting signals, and the VCU sends motor negative rotation speed control signals for controlling the output of the motor and torque opposite to the rotation direction of the transmission pre-engaging-gear input shaft to reduce the rotation speed of the pre-engaging-gear input shaft to an IPU according to the motor negative rotation speed request signals; and the VCU stores the target rotational speed value of the pre-engaging-gear input shaft, when the rotation speed of the pre-engaging-gear rotation speed input shaft is less than the target speed value, and the VCU sends engaging-gear signals to the TCU. The static gear-shifting control system makes the impact smaller, the noise and vibration lower and the driving experience better when a gear is engaged.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a hybrid electric vehicle, in particular to a static shift control system and method for a hybrid electric vehicle. Background technique [0002] At present, cars with automatic transmissions are becoming more and more popular among consumers. Automobile automatic transmissions are mainly divided into AT transmission (AT), continuously variable automatic transmission (CVT), electromechanical automatic transmission (AMT) and dual clutch transmission (DCT). Among them, the dual-clutch transmission has the advantages of fast shifting, fuel economy, high transmission efficiency, and no power interruption for shifting. It is also more and more widely used in hybrid vehicles. [0003] Dual-clutch transmissions are divided into dry-type dual-clutch transmissions and wet-type dual-clutch transmissions. The wet-type dual-clutch transmissions are oil-cooled, which has a good heat dissip...

AI Technical Summary

Problems solved by technology

Although this method can slightly reduce the speed of the input shaft, due to the existence of inertia, the speed of the input shaft will still remain in a relatively high range, that is, there is still a certain impact when shifting gears

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