Relay valve control method and device in hill starting process and air braking system

Abstract

The invention discloses a relay valve control method and device in a hill starting process and an air braking system. The method comprises the following steps of: acquiring a clutch pedal position signal and a speed signal; judging that a vehicle is in an anti-slip braking state when a clutch pedal is in the lowest position and the speed of the vehicle is zero, or judging that the vehicle is in an anti-slip braking releasing state when the clutch pedal is not in the lowest position and / or the speed of the vehicle is not zero; and when the vehicle is in the anti-slip braking state, instantly inputting high pressure control gas to a control gas inlet to a relay valve to realize the anti-slip braking of the vehicle, when the vehicle is in the anti-slip braking releasing state, stopping inputting high-pressure control gas to the control gas inlet to the relay valve to release the anti-slip braking of the vehicle, or when the vehicle is switched to the anti-slip braking releasing state from the anti-slip braking state, stopping inputting high-pressure control gas to the control gas inlet to the relay valve after delaying setting time so as to release the anti-slip braking of the vehicle. The control method provided by the invention is simple, and the performance demand on the control device is low.

Description

technical field [0001] The invention belongs to the technical field of automobile control, and in particular relates to a control method for controlling the action of a relay valve in the process of assisting the driver to start on a hill, a control device for implementing the method, and a device using the control device. Air brake system. Background technique [0002] At present, passenger cars and trucks with larger load capacity are mostly braked by air pressure braking system. The structure of the air pressure braking system is as disclosed in CN202320266U, which mainly includes air storage tank, brake valve and relay valve. And the brake air chamber, the brake valve is a control device for controlling the action of the relay valve. The brake valve has an air inlet connected to the air storage cylinder and an air outlet for outputting control air to the relay valve. The relay valve has The air inlet, the control air inlet, the air outlet and the exhaust port connected ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for controlling a relay valve during a hill start, so as to solve the technical problem in the prior art that the cost of the control device required to control the action of the relay valve during the hill start is relatively high; at the same time, Also provided is a relay valve control device for implementing the above-mentioned control method during start-up on a hill and an air braking system using the control device

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