Trailer EPB system with brake-by-wire function and control method thereof

Abstract

The invention provides a trailer EPB system with a brake-by-wire function. A trailer EPB switch is connected with a trailer EPB module, an air inlet of the trailer EPB module is connected with an air source, an air outlet of the trailer EPB module is connected with a pressure sensor and a trailer independent brake valve, the exterior of the air outlet is connected with a rear axle parking spring air chamber, and a first control port is connected with a parking detection valve. The outside of the first control port is connected with a trailer control valve, the second control port is connected with the control end of the proportional relay valve and connected with the pressurization electromagnetic valve and the decompression electromagnetic valve, and the air outlet is communicated with the inside of the second control port. Electric control linear parking braking of a tractor and a trailer can be achieved through the linear trailer EPB switch, and when electric control parking braking is performed on a wet and slippery road surface, the trailer is independently controlled through the trailer EPB switch to perform trailer independent braking control; when the vehicle is parked on the ramp for a long time, the parking force of the tractor is detected, so that the vehicle can be parked on the ramp only by the tractor, and the vehicle sliding caused by the parking brake failure of the trailer after air leakage is prevented.

Description

technical field [0001] The invention relates to the technical field of electronic parking brake control of an air-braked trailer, in particular to an EPB system of a trailer with a brake-by-wire function and a control method thereof. Background technique [0002] When the traditional towing vehicle needs to brake the trailer through the hand brake, it is necessary to add a trailer manipulator valve in the cab to control the trailer by operating the trailer manipulator valve. This method takes up the space of the cab and is not beautiful. At present, the foreign EPB scheme does not have the part to control the trailer, so it cannot realize the independent control of the trailer. Therefore, in special working conditions such as icy roads, it is impossible to make the traction train maintain braking balance and prevent folding by independent trailer braking. In addition, the current foreign EPB solutions cannot provide the parking force detection function. Therefore, there is...

AI Technical Summary

Problems solved by technology

[0002] When the traditional towing vehicle needs to brake the trailer through the hand brake, it is necessary to add a trailer manipulator valve in the cab to control the trailer by operating the trailer manipulator valve, which takes up the space of the cab and is not beautiful

At present, foreign EPB schemes do not have a part to control the trailer, so it is impossible to individually control the trailer

Therefore, in special working conditions such as icy roads, it is impossible to brake the traction train to maintain braking balance and prevent folding by independent trailer braking.

In addition, the current foreign EPB solutions cannot provide the parking force detection function.

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