Commercial semi-trailer closed-loop electronically controlled brake hysteresis compensation device

Abstract

The invention discloses a commercial semi-trailer closed-loop electric control brake hysteresis compensation device which aims at solving the problem that during automobile and train braking, trailer brake hysteresis is caused and the trailer brake strength cannot be controlled. The device comprises a tractor mechanical part, a trailer mechanical part and a controller (11). The tractor mechanical part comprises a first pressure sensor (3). The trailer mechanical part comprises a first electromagnetic valve (4), a second pressure sensor (6) and a second electromagnetic valve (7). The controller (11) comprises an A / D conversion chip (24), a first relay (30) and a second relay (31). The third port of the first pressure sensor (3) is connected with the twenty-sixth port of the A / D conversion chip (24), the third port of the second pressure sensor (6) is connected with the twenty-seventh port of the A / D conversion chip (24), the first electromagnetic valve (4) is connected with the fifth port of the first relay (30), and the second electromagnetic valve (7) is connected with the fifth port of the second relay (31).

Description

technical field [0001] The invention relates to a hysteresis compensating device for electronically controlled servo pneumatic brakes, more precisely, the invention relates to a closed-loop electronically controlled braking hysteresis compensating device for a commercial semi-trailer. Background technique [0002] In the braking system of a car train, since the braking action of the trailer is driven by the high-pressure gas generated when the main car brakes, it takes a certain amount of time for the gas to flow in the control pipeline, so the car train brakes At the same time, the braking time of the rear trailer will lag behind that of the main vehicle. During the braking process, dangerous conditions such as vehicle folding, tail flicking, and sideslip will occur due to the mismatch between the main and trailer brakes. At the same time, the trailer’s braking lags behind. It will aggravate the axle load transfer during the braking of the automobile train and the impact fo...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems of trailer braking hysteresis and uncontrollable trailer braking strength in the prior art when braking automobiles and trains, and to provide a closed-loop electronically controlled braking hysteresis compensation device for commercial semi-trailers

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