Manual valve function

Engine braking is exhaust braking, and for heavy-duty vehicles, braking mainly includes service braking; Parking, parking braking, and exhaust braking. The driving brake is achieved through the dual chamber brake master valve, the parking and parking brake are achieved through the manual valve, and the exhaust brake is achieved through the exhaust brake butterfly valve. The exhaust brake butterfly valve is installed behind the engine exhaust hose. When the button valve is operated, the air pressure passes through the working cylinder of the exhaust brake butterfly valve, causing the air piston in the working cylinder to move, thereby driving the push rod to rotate the butterfly valve disc 90 degrees, closing the exhaust hose, and obstructing the engine exhaust. When the engine exhaust is obstructed, the piston in the engine cylinder cannot travel normally, and it must resist this resistance. Therefore, under this air resistance, the action of the engine piston decreases, and due to the traction force, the speed slows down.