Dynamic coordinated control method for gear-shifting process of hybrid electrical vehicle

Abstract

The invention relates to a dynamic coordinated control method for a gear-shifting process of a hybrid electrical vehicle based on motor speed closed-loop control, which includes entering control logic, entering dynamic coordinated control strategy for the gear-shifting process and quitting the control logic. The method includes steps: firstly, judging after entering the control logic, entering the dynamic coordinated control strategy for the gear-shifting process when the hybrid electrical vehicle has operating mode of engine driving and an expected gear is different from an actual gear, otherwise, an expected engine torque and an expected motor torque set via a vehicle energy management strategy are implemented by an engine and a motor; secondly, setting corresponding engine and motor coordinate control strategy according to engine torque reducing process, gear-selecting and gear-shifting process and engine torque restoring process which are necessary to gear shifting of an automatic gearbox after entering the dynamic coordinated control strategy for the gear-shifting process; and thirdly, quitting the dynamic and coordinate control strategy and driving according to a new gear when a target gear is identical with the actual gear and difference between the engine torque and the expected engine torque set via the energy management strategy is in a preset range. The dynamic coordinated control method can be widely used for gear-shifting processes of various hybrid electrical vehicles.

Description

technical field [0001] The invention relates to a control method, in particular to a dynamic coordination control method for a hybrid electric vehicle shifting process based on a closed-loop control of motor speed. Background technique [0002] Mechanical automatic transmission (AMT) has the advantages of high transmission efficiency, simple structure, easy manufacture and automatic shifting, but this purely mechanical transmission will inevitably appear impact and power interruption during the shift process, resulting in a smooth vehicle. Sexuality and motivation deteriorated. Hybrid electric vehicles equipped with AMT can make full use of the characteristics of fast dynamic response and accurate torque control of the motor to make up for the lack of power interruption and impact during the AMT shifting process, and improve the power and ride comfort of the vehicle. [0003] At present, the research on the coordinated control of the shifting process of hybrid electric vehi...

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, it is difficult to accurately obtain the engine torque in real time

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