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How does compression brakes work ( jacobs brake ) ?

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Question added by Haytham Younus , Mechanical Vocational Instructor , interserve
Date Posted: 2016/08/11
Fouad El Hamdi
by Fouad El Hamdi , procurement manager , Emdad - Barwa

Jake brake properly refers to the Jacobs brand of engine brakes, the term has become a genericized trademark and is often used to refer to engine brakes or compression release engine brakes in general, especially on large vehicles or heavy equipment.

adeel aziz
by adeel aziz , Diesel technician , Royal Saudi Naval Force

compression release engine brake, frequently called a Jake brake or Jacobs brake, is an engine braking mechanism installed on some diesel engines. When activated, it opens exhaust valves in the cylinders after the compression cycle, releasing the compressed air trapped in the cylinders, and slowing the vehicle.

A compression brake is a device which acts on the valves of a diesel engine to enhance engine braking . This device allows partially open the exhaust valves during the four strokes of the engine , reducing the compression of air and preventing the diesel fuel to ignite , although fuel injection should not be suspended .

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