EMISSIONS AND FUEL ECONOMY OF A VEHICLE EQUIPPED WITH THE EATON VALVE SELECTOR
The deactivation of one or more engine cylinders is a method that has been proposed as offering potential for vehicle fuel economy improvements. At low power outputs the throttle is nearly closed. This introduces a "throttling loss", which is the energy that the engine must expend to draw the fuel/air mixture through the carburetor throtte opening. By operating an engine on a reduced number of cylinders, and operating these cylinders at higher power levels, the throttling losses are appreciably reduced. A cylinder deactivation system is being considered for use in several 1981 Cadillac models. Other cylinder deactivation systems are currently under development in the United States. Since EPA had not recently tested a cylinder deactivation system designed for current vehicles, EPA contacted the Eaton Corporation and requested the loan of a vehicle with the Eaton Valve Selector System installed. Eaton made available a system installed in a development vehicle.
Environmental Protection AgencyTest and Evaluation Branch, 2565 Plymouth Road
Ann Arbor, MI USA 48105
- BARTH, E A
- Publication Date: 1980-4
- Pagination: 17 p.
- TRT Terms: Air quality management; Automobiles; Economics; Engine cylinders; Exhaust gases; Fuel consumption; Throttles; Transportation; Vehicle power plants
- Uncontrolled Terms: Cylinders
- Old TRIS Terms: Automobile engines; Deactivation; Throttling
- Subject Areas: Economics; Transportation (General); Vehicles and Equipment; I96: Vehicle Operating Costs;
- Accession Number: 00327074
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: EPA-AA-TEB-80-16 Tech Rpt.
- Files: TRIS
- Created Date: Feb 18 1981 12:00AM