Control method for automobile steep slope slow descending system

Abstract

The invention discloses a control method for an automobile steep slope slow descending system. According to the control method, when a steep slope slow descending button is pressed down, an accelerator pedal is loosened, a brake pedal is loosened and the current gradient and the current automobile speed meet certain conditions, the pressure of a brake pipeline is controlled to enable the automobile to travel in a constant speed; when the accelerator pedal or the brake pedal is stepped down, controlling of the pressure of the brake pipeline is stopped temporarily, and the automobile travels in a normal downhill speed; and after the accelerator pedal and the brake pedal are both loosened, if the current gradient and the current automobile speed still meet the conditions, controlling of the pressure of the brake pipeline is recovered to enable the automobile to travel in a constant speed. By adopting the control method, at the time of steep slope slow descending, a driver can freely control the automobile speed through stepping the brake pedal or the accelerator pedal within a certain speed range, and thus the comfort degree of the driver at the time of using the steep slope slow descending system is improved.

Description

technical field [0001] The invention belongs to the field of automobile braking control, and in particular relates to a control method for an automobile steep slope descent system. Background technique [0002] With the improvement of users' requirements on the safety performance of automobiles, more and more steep slope descent systems are used in automobiles. [0003] Such as figure 1 As shown, the slope descent system includes ESC system 1 (that is, electronic stability control system), slope descent button 2, accelerator pedal 6, brake pedal 7, slope sensor 8, and four Wheel speed sensor 5 , four brakes 3 respectively installed on four wheels and brake pipeline 4 connecting ESC system 1 and brakes 3 . The controller of ESC system 1 can separately and independently control the brake pressure of each wheel cylinder (that is, control the brake line pressure of each wheel), and is the control unit for the steep slope descent system to realize speed control; 1 is connected...

AI Technical Summary

Problems solved by technology

When the driver wants to step on the accelerator to increase the speed of the vehicle under long downhill conditions, the vehicle will directly exit the operating state of steep slope descent, so that the driver may only use the steep slope descent system under severe conditions, which limits the use of the steep slope descent system. The range of use, the comfort of using the hill descent system is not good, it may cause the driver to complain

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