Control method and control system for hill starting of automobile

Abstract

The invention relates to a control method and a control system for hill starting of an automobile, and the control method comprises the following steps: when a starting intention exists, obtaining a current load demand torque value C; calculating a power torque value E of the engine when the load torque percentage of the engine is at a first set value D according to the current load demand torque value C; and controlling the engine to output the power torque value E to assist in starting. According to the embodiment of the invention, the operation of releasing the hand brake is changed into the operation of releasing the brake pedal, the power torque value E of the engine is calculated directly through related controllers such as a whole vehicle controller or a vehicle body controller and then the engine is requested to complete the operation of the accelerator, and then auxiliary starting can be completed. The controller controls the starting of the vehicle according to the operation of a driver, the starting is more stable, the situations of flameout, vehicle sliding and violent starting are avoided, and the operations such as starting interruption and re-starting in the starting process are easier and faster.

Description

technical field [0001] The present application relates to the technical field of vehicle control, in particular to a control method and control system for starting a vehicle on a hill. Background technique [0002] Vehicles equipped with an automatic transmission (AMT / AT / DCT) can use the transmission to control the linkage state of the engine torque and the clutch to ensure that the engine increases the output torque when the vehicle starts, so as to transmit reasonable power to the wheels, so that the wheels can maintain constant move or scroll forward. [0003] Vehicles equipped with vehicle stability systems (ESP / ESC) or electronic brake control systems (EBS) can use the brake controller to control the clamping force of the brake pads, increase the braking force when the wheels turn backward, and stabilize for a certain period of time, the driver can Use gas pedal or other operations during this time to keep the vehicle stationary or move forward, so as to avoid rolling....

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a control method and a control system for starting a car on a hill, so as to solve the problem of using the left foot, right If the foot and right hand are operated at the same time, it is easy to cause the engine to stall, the car to slip, and the start to be abrupt due to unreasonable operation, which may cause traffic accidents.

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