(slang) Especially on trucks, an engine compression release braking system that opens the exhaust valves in each cylinder near the top of their compression strokes in order to slow the vehicle; an engine retarder.
A compression release engine brake from Jacobs Vehicle Systems, popularly known as a "Jake brake"
(slang) Especially on trucks, an engine compression release braking system that opens the exhaust valves in each cylinder near the top of their compression strokes in order to slow the vehicle; an engine retarder.
A view of engine compression brake rocker arm (the thinnest arm at the left of each set)