The Jake Brake permits large trucks to descend long, steep grades at a controlled speed. It was the first practical mechanism for altering on demand the valve timing on a truck diesel engine, thereby converting the engine to a power absorbing machine. The modified engine can continue to power the truck in normal operation, allowing service brakes to remain cool for emergency situations. Invented by Clessie Lyle Cummins (1886-1968), this device (produced by the Jacobs manufacturing company since 1961) has contributed significantly to highway safety.
Cummins, Clessie Lyle
Society: ASMEMain Category: Mechanical, RoadSub Category: Road TransportationEra: 1950-1959DateCreated: 1957Jacobs Manufacturing CompanyBloomfieldState: CTZip: 06002Country: USAWebsite: http://www.asme.org/about-asme/history/landmarks/topics-m-z/road-and-off-road-transportation/-108-jacobs-engine-brake-retarder-%281957%29Creator: Cummins, Clessie Lyle
YearAdded:Image Credit: Courtesy Wikipedia/Sierra Fournier (CC BY-SA 3.0)Era_date_from: 1957