United brake system and method for combination vehicle

Abstract

The invention discloses a united brake system and a united brake method for a combination vehicle. The united brake system is composed of an air pressure braking system, a retarder system and an electronic control unit (ECU); the retarder system is installed on a trailer by improving an axle of the trailer, so that brake torque of a retarder is evenly distributed to a front axle and a rear axle of the trailer through a trailer transmission system, and brake stability is improved; when the combination vehicle travels normally, an air compressor and an auxiliary air source inject high-pressure air into a front air storage tank of a motor tractor, a rear air storage tank of the motor tractor and an air storage tank of the trailer through a pressure adjusting valve and a three-loop protective valve; power distribution can be controlled accurately through electric control, under the condition of ensuring the brake requirement of the combination vehicle, the retarder system is used as much as possible, brake loads of a main brake are reduced, a double-control brake valve is adopted, under the condition that the electronic control part fails, the air control part works normally, and therefore the normal brake requirement is not affected.

Description

technical field [0001] The invention relates to a combined braking system for automobiles and trains, in particular to a combined braking system applied to an air pressure braking system for automobiles and trains and a retarder system for trailers, and belongs to the technical field of vehicle braking. Background technique [0002] Car trains are kinematic coupling bodies composed of tractors and trailers. Because they can realize the functions of "section transportation" and "drop and pull transportation", they have become an important means to improve transportation efficiency, but braking safety has always been a major hidden danger for car trains. , because the load of the car train is usually large, in the continuous braking (such as down a long slope) working condition, its service brake will form a thermal fading phenomenon due to long-term high-load work, resulting in a sharp drop in braking force. Therefore, many manufacturers now choose to install auxiliary bra...

AI Technical Summary

Problems solved by technology

[0005] At present, only non-driven load-bearing bridges are used on semi-trailers or trailers, which do not have power transmission capabilities, and only play the role of carrying the car body and generating frictional braking force when necessary. Therefore, the retarder cannot be directly installed on semi-trailers or trailers. On the bridge, the original axle needs to be improved

[0006] The Chinese patent application number is 200510101686.4, and the name is an auxiliary braking device for semi-trailers and trailers. drive axle, but this device mainly describes the structure of the eddy current retarder and the installation method on the girder, and does not introduce the structure of the trailer drive axle, nor does it propose to form a joint brake with the air brake system to meet different working conditions car brake demand

[0007] Chinese patent application number 201210233128.3 discloses a trailer axle with a retarder, the retarder braking force only acts on a single axle, and the trailer axle of the actual heavy-duty vehicle train basically adopts the form of multiple bridges , the braking torque of the retarder cannot be evenly distributed on each axle of the trailer, which affects the braking stability of the trailer

[0008] Chinese patent application number 201310240519.2 discloses a trailer wheel retarder and its control method, but limited by the wheel space, the size and braking torque of the retarder are limited, it is difficult to fully Meet the braking requirements of heavy-duty trains with heavy loads

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