11-04-2017, 09:16 AM
An exhaust brake is a means of slowing down a diesel engine by closing the exhaust path of the engine, causing the exhaust gases to be compressed in the exhaust manifold and cylinder. Since the exhaust is being compressed, and there is no fuel being applied, the engine runs backward, slowing down the vehicle. The amount of negative torque generated is usually directly proportional to the back pressure of the motor.
An exhaust brake is a device that essentially creates a significant restriction on the exhaust system, and creates a substantial exhaust back pressure to retard engine speed and provide some extra brakes. In most cases, an exhaust brake is so effective that it can slow down a heavily loaded vehicle in a downgrade without ever applying the vehicle service brakes. The exhaust brakes are manufactured by many companies. The brakes vary in design, but operate essentially as described above. The most advanced exhaust brakes have the Exhaust Pressure Modulation (EPM) that controls back pressure, which in turn improves braking performance across a range of engine speeds.
An exhaust brake is a device that essentially creates a significant restriction on the exhaust system, and creates a substantial exhaust back pressure to retard engine speed and provide some extra brakes. In most cases, an exhaust brake is so effective that it can slow down a heavily loaded vehicle in a downgrade without ever applying the vehicle service brakes. The exhaust brakes are manufactured by many companies. The brakes vary in design, but operate essentially as described above. The most advanced exhaust brakes have the Exhaust Pressure Modulation (EPM) that controls back pressure, which in turn improves braking performance across a range of engine speeds.
It can be understood in the following video: