jake brake
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English
Alternative forms
Etymology
From JakeBrake, an abbreviation for the Jacobs brand name of engine braking systems.
Pronunciation
Audio (General Australian): (file)
Noun
jake brake (plural jake brakes)
- (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.