Control method and system for vehicle climbing following and slope stabilizing starting and storage medium

Abstract

The invention provides a control method and system for vehicle climbing following and slope stabilizing starting and a computer readable storage medium. The control process comprises the steps that when a vehicle just enters a starting state, a power source guides a rotating speed target to be a starting rotating speed target, and slip frequency intervention is not conducted; after the starting state reaches the set time T or the rotating speed of the power source is stable, slip frequency intervention control is started; according to slip intervention control, a slip intervention target rotating speed smaller than a starting target rotating speed is introduced to obtain a power source guiding rotating speed, the power source guiding rotating speed is reduced along with the slip intervention target rotating speed, and PID closed-loop control clutch torque loading is adopted to enable the power source actual rotating speed to be reduced along with the power source guiding rotating speed. And the slip frequency between the actual rotating speed of the power source and the rotating speed of the gearbox input shaft is reduced. According to the method, slip frequency intervention control is introduced in the starting control process, the thermal load under the low-speed car following and slope stabilizing working conditions in the climbing starting process is reduced, and the risk of oscillation or galloping caused by high actual starting rotating speed of a power source due to misalignment of a PT curve of a clutch and inadaptation of starting calibration is further restrained to a certain extent.

Description

technical field [0001] The invention belongs to the control technology in the field of automobile and vehicle power, and in particular relates to the control technology when a vehicle climbs a hill and follows a car and starts on a stable slope. Background technique [0002] Vehicles equipped with DCT or AMT (traditional vehicles, hybrids) will first control the power source speed up to reach the target speed in order to obtain the torque output capability and quick response ability of the engine when starting, and keep the power source near the target speed. , the speed of the gearbox input shaft rises until it is synchronized with the speed of the power source, and the start control is completed. The starting process is generally divided into three stages: the speed rises, the power source speed stabilizes near the target speed, and the speed is synchronized. This starting method has a large slip and friction condition, which will generate a large amount of heat load, and...

AI Technical Summary

Problems solved by technology

The slope stabilization condition described in this patent document is to stabilize the slope by releasing the braking force by stepping on the brakes, and it does not solve the problem of the heat load of the slope stabilization clutch when the accelerator is stepped on at low speed and the car is followed or the brakes are not stepped on.

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