Control method and device for torque of engine

Abstract

The invention provides a control method and device for torque of an engine. The method is applied to a hybrid power controller of a single-shaft parallel-type hybrid power system. The method comprisesthe steps of determining demand torque of the engine on the condition that the single-shaft parallel-type hybrid power system is in a driving mode; obtaining the current rotation speed of the engine,and determining target correction torque corresponding to the current rotation speed according to predetermined correction torque of the engine under different rotation speeds; correcting the demandtorque according to the target correction torque, and sending the corrected demand torque to an engine controller, so that the engine controller controls the engine to output torque according to the corrected demand torque. Through correction, the difference between the actual output torque of the engine and the distributed demand torque can be reduced, and the precision of controlling the torqueof the engine is improved.

Description

technical field [0001] The present invention relates to the technical field of hybrid power, more specifically, to an engine torque control method and device. Background technique [0002] figure 1 A schematic diagram of the structure of a single-shaft parallel hybrid system is shown. The single-shaft parallel hybrid system includes an engine 1, a clutch 2, a motor 3, a battery 4 and a gearbox 5, and the engine 1 and the motor 3 are coaxially connected. [0003] At this stage, the single-shaft parallel hybrid system determines the total required torque by the hybrid controller combined with the vehicle operating conditions, and distributes the respective required torques to the engine and the motor according to the working status of the motor controller, engine controller and battery controller . [0004] However, in practical applications, compared with the motor, the actual output torque of the engine differs greatly from the allocated required torque, resulting in low e...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, compared with the motor, the actual output torque of the engine differs greatly from the allocated required torque, resulting in low engine torque control accuracy

Images