Electromagnetic exhaust braking device for automobile

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 flex