Method for controlling hybrid electric vehicle

Abstract

The invention discloses a hybrid electric vehicle control method. According to the hybrid electric vehicle control method, the operating mode of the whole vehicle is divided into a still mode, a starting mode, a constant-speed traveling mode, an acceleration / assisting mode, a deceleration / braking mode and a fuel cut-off mode. In the still mode, an engine is shut down, the speed ratio of a speed reducer reaches the maximum value, so that preparation is made for starting. In the starting mode, an ISG motor is used for driving the engine to start, so that the vehicle is started. In the constant-speed traveling mode, according to the SOC state of a battery and the speed of the vehicle, the vehicle travels at a constant low speed or a constant intermediate speed or a constant high speed, so that the engine runs in an economical area or a high-efficiency area. In the acceleration / assisting mode, the ISG motor supplies assisting power to the engine. In the deceleration / braking mode, the ISG motor is in the electricity generating state. In the fuel cut-off mode, fuel supply to the engine is cut off. According to the hybrid electric vehicle control method, the operating mode of the whole vehicle is detailed, the braking energy recovery function is achieved, fuel consumption of the whole vehicle is lowered, and emission is reduced.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for a hybrid electric vehicle with a vehicle body. Background technique [0002] In the development process of hybrid electric vehicles, the control method is the core of the control system. How to formulate a reasonable control method under a certain powertrain layout is the focus of the development of hybrid electric vehicles. Vehicle dynamics, driving experience, vehicle and personnel safety, etc. are all related to the design of the control method. [0003] Most of the existing control methods for hybrid electric vehicles output the required torque of the vehicle according to the working mode of the vehicle, but the division of the working mode of the vehicle is not detailed enough, and some of them do not have the function of braking energy recovery. Not enough consideration. Contents of the invention [0004] The present invention is completed in order to solve the d...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing control methods for hybrid electric vehicles output the required torque of the vehicle according to the working mode of the vehicle, but the division of the working mode of the vehicle is not detailed enough, and some of them do not have the function of braking energy recovery. Insufficient consideration

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