A control method and device for a vehicle starting on a hill

Abstract

The embodiment of the present application provides a control method and device for vehicle hill start. When controlling the vehicle during the hill start process, the basis for determining the basic required torque of the engine in the vehicle is determined according to the opening position of the clutch in the vehicle. above; increase the compensation torque of the engine, and determine the total demand torque of the engine according to the basic demand torque of the engine and the compensation torque of the engine; then determine the demand torque of the engine and the torque threshold of the electric motor in the vehicle according to the total demand torque of the engine and The demanded torque of the motor improves the accuracy of the demanded torque of the engine and the demanded torque of the motor, so that when the vehicle is controlled to start on a hill according to the demanded torque of the engine and the demanded torque of the motor with high accuracy, the vehicle can be started on a hill Precise control of the engine and motor during the process, so as to avoid the problems of slipping and stalling when the vehicle starts on a hill.

Description

technical field [0001] The present application relates to the field of vehicle control, in particular to a method and device for controlling a vehicle starting on a hill. Background technique [0002] As a common means of transportation, automobiles have brought a lot of convenience to people's lives, and have gradually become an indispensable part of people's daily life. When the vehicle starts on a slope road condition, there are often problems of inaccurate engine control, which leads to insufficient power, slipping and stalling of the vehicle. [0003] In the prior art, by obtaining the accelerator opening, engine speed, clutch shaft speed, and road gradient; and calculating the vehicle acceleration torque and vehicle resistance torque, the required torque of the engine is obtained, and the vehicle's ramp start is completed according to the required torque of the engine process. [0004] However, this solution only determines the required torque of the engine correspon...

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Problems solved by technology

[0004] However, this solution only uses the clutch oil pressure to determine the required torque of the engine corresponding to the clutch, and the accuracy is low, causing the vehicle to still have problems such as insufficient vehicle power, backsliding, and flameout during the ramp process.

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