An Engine brake is a valve which essentially creates a back-pressure in the exhaust system, which applies enough force onto the engine’s pistons to slow the engine. Thus, simply restricting the exhaust flow can generate substantial braking and slows down the Vehicle.
Engine brake consists of a butterfly valve inside of a tubular housing operated by Air Cylinder . A solenoid opens/closes the exhaust brake as necessary. In the open position, exhaust flows normally. In the closed or partially closed position, exhaust back pressure is greatly increased. The back pressure works against the engine as it pumps air out of the cylinders, helping to slow down the engine and therefore the vehicle.
Engine brakes are installed directly behind the turbocharger turbine outlet
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