Torque control method of electromechanical coupling dual-clutch hybrid power system

Abstract

The invention discloses a torque control method of an electromechanical coupling double-clutch hybrid power system. A vehicle control unit distributes torque required by a driver, and the vehicle control unit controls an engine management system and a motor control unit to achieve control over engine request torque and motor request torque; then a motor request torque is calculated according to the working condition, and when the actual torque of the engine does not reach the engine request torque, partial torque with slow response of the engine is supplemented by the motor; when the automatictransmission control unit requests intervention in engine torque, the engine request torque drops to a certain target value, and the motor supplements part of torque lost by rapid torque drop of theengine. According to the method, the difference value between the driver torque and the actual engine torque serves as the motor request torque value, the problem that the dynamic property is insufficient and weakened due to the fact that the engine torque response is slow is solved, and the dynamic property and smoothness in the torque interaction process are improved.

Description

Technical field [0001] The invention relates to a technology in the field of coordinated control of engine torque and motor torque, in particular to a torque control method of an electromechanical coupling dual-clutch hybrid power system. Background technique [0002] With the global energy shortage and the increasingly serious impact of vehicle emissions on environmental pollution, the promotion of low-energy, low-emission new energy vehicles has become the consensus of all walks of life. Due to the immature battery technology, the battery life of pure electric vehicles cannot meet the needs of users. Hybrid vehicles have become the first choice. At the same time, in order to meet the power and comfort, the P2.5 architecture eDCT transmission and dual-clutch transmission suitable for hybrid vehicles have been developed. (DCT) solves the power requirements, but due to the characteristics of the DCT and the slow response of the engine torque, there are still problems of insufficie...

AI Technical Summary

Problems solved by technology

Due to the immature battery technology and the mileage problem of pure electric vehicles cannot meet the needs of users, hybrid vehicles have become the first choice. At the same time, in order to meet the power and comfort, a P2.5 architecture eDCT transmission and dual-clutch transmission suitable for hybrid vehicles have been developed. (DCT) solves the power requirements, but due to the characteristics of DCT itself and the slow response of engine torque, there are still problems of insufficient power and poor comfort during the torque interaction process

Images