Electromagnetic exhaust braking device for automobile

Abstract

The invention discloses an electromagnetic exhaust braking device for an automobile, which comprises an exhaust valve, wherein the exhaust valve comprises an exhaust pipe body with an exhaust port, arotating shaft coaxially arranged in the exhaust pipe body and a disc which is fixed to the rotating shaft and can block the exhaust port of the exhaust pipe body, the exhaust valve is connected withan electromagnetic driving mechanism capable of driving the rotating shaft to rotate to open or close the exhaust port, the electromagnetic driving mechanism comprises an electromagnetic mechanism shell, an electromagnetic coil arranged in the electromagnetic mechanism shell and an iron core which is arranged in the electromagnetic coil and can move forwards and backwards under electromagnetic force, and a push rod mechanism capable of enabling the rotating shaft to rotate is connected between the iron core and the rotating shaft. In the electromagnetic driving device, an auxiliary push rod and a main push rod are flexibly connected, a compensation spring is arranged between the auxiliary push rod and the main push rod, and if there is an error in the attraction position of the iron core,the compensation spring can be compressed by electromagnetic force to compensate the error when the movement stroke of components of the disc is small, and the iron core and a base cannot be completely attracted or the disc cannot be completely closed.

Description

technical field [0001] The invention relates to the technical field of automobile braking devices, in particular to an electromagnetic exhaust braking device for automobiles. Background technique [0002] When the vehicle is going downhill, in order to reduce the wear and thermal degradation of the brakes during frequent braking, exhaust braking is used as a commonly used auxiliary braking method by most heavy trucks, medium trucks and buses. Exhaust braking is performed by air pressure boosting, and all vehicles must have an air source, which makes it impossible for light trucks, off-road vehicles and other vehicles without air sources to use exhaust braking as auxiliary braking. Contents of the invention [0003] The purpose of the present invention is to solve the disadvantages of the above-mentioned background technology, and provide an electromagnetic exhaust brake device for automobiles that can realize brake assistance without an air source. [0004] In order to ac...

AI Technical Summary

Problems solved by technology

[0002] When the vehicle is going downhill, in order to reduce the wear and thermal degradation of the brakes during frequent braking, exhaust braking is used as a commonly used auxiliary braking method by most heavy trucks, medium trucks and buses. Exhaust braking is performed by air pressure boosting, and all vehicles must have an air source, which makes it impossible for light trucks, off-road vehicles and other vehicles without air sources to use exhaust braking as auxiliary braking

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