Permanent magnet composite type brake chamber capable of improving brake hysteresis characteristics of trailer and control method of brake chamber

Abstract

The invention discloses a permanent magnet composite type brake chamber capable of improving brake hysteresis characteristics of a trailer and a control method of the brake chamber. The permanent magnet composite type brake chamber mainly comprises a service braking chamber, a service braking chamber push rod, a parking braking chamber, a permanent magnet ring A, a permanent magnet ring B, a parking braking piston, a parking braking chamber push rod and a connecting fork; an electronic control system comprises a brake pedal displacement sensor, a handle displacement sensor, an air pressure sensor A, an air pressure sensor B, a two-position three-way reversing valve, a two-position two-way reversing valve and a microprocessor, the microprocessor controls air pressure signals of the chambers according to a brake pedal displacement signal, a hand control valve handle position signal, a parking braking chamber inner air pressure signal and a servo quick release valve and controls the on-off state of respective electromagnetic valves of the two-position three-way reversing valve and the two-position two-way reversing valve. The trailer braking delay time can be shortened, the braking delaying characteristic of a trailer air braking system is improved, and the braking stability of a combination vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles and trains, and in particular relates to a permanent magnet composite brake air chamber and a control method thereof for improving the brake hysteresis characteristics of trailers. Background technique [0002] With the rapid growth of my country's total economic volume, the transportation industry has become an important lifeline to promote development. Road transport is an indispensable part of it. Among the various road transport vehicles, car trains occupy a large proportion. Compared with single transport vehicles with the same load, semi-trailer car trains have higher transportation productivity and lower operating costs. Although there are a large number of car trains in China, the safety hazards of car trains have not been resolved, and the brake hysteresis of trailers is one of the most important problems. Due to the compressibility of the gas, the trailer brake control pipeline is ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the tractor and the trailer collide and cause braking instability caused by trailer braking hysteresis, the present invention provides a permanent magnet composite brake air chamber and its control device that improves the trailer braking hysteresis characteristics. The two-position three-way reversing valve and the two-position two-way reversing valve, through the exhaust brake of the parking brake air chamber of the permanent magnet composite brake air chamber of the trailer, make the trailer brake in the permanent magnet composite brake air Under the repulsion of a pair of mutually exclusive permanent magnet rings in the chamber, it can start quickly and achieve rapid braking.

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