jake brake
nounEtymology From JakeBrake, an abbreviation for the Jacobs brand name of engine braking systems.
1
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.
- Synonyms
- Jacobs brake
- Coordinate terms
- compression release engine brake, engine braking