Compression release engine brake

A view of engine compression brake rocker arm (on the left).

A Jake Brake from Jacobs Vehicle Systems.

A 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.

单词	Jake Brake
释义	Jake Brake 英语百科 Compression release engine brake A 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.
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Jake Brake

Compression release engine brake