Record Display for the EPA National Library Catalog

RECORD NUMBER: 15 OF 83

OLS Field Name OLS Field Data
Main Title Emissions and fuel economy of the Automotive Cylinder Deactivator System (ACDS) /
Author Barth, Edward Anthony.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Test and Evaluation Branch.
Publisher Environmental Protection Agency, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Test and Evaluation Branch,
Year Published 1980
Report Number EPA-AA-TEB-81-7
Stock Number PB81-177958
OCLC Number 775441322
Subjects Automobiles--Fuel consumption--Measurement.
Additional Subjects Automobile engines ; Fuel consumption ; Air pollution ; Engine cylinders ; Exhaust emissions ; Performance evaluation ;
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9100X6QO.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELCD  EPA AA-TEB-81-7 NVFEL Library/Ann Arbor, MI 02/13/2012
NTIS  PB81-177958 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 40 p. : ill., charts ; 28 cm.
Abstract
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 output the throttle is nearly closed. This introduces a 'throttling loss', which is the energy the engine must expend to draw the fuel-air mixture through the carburetor throttle opening. By operating an engine on a reduced number of cylinders and operating these at high power levels, the throttling losses are appreciably reduced. The operating cylinders are therefore run at a high brake-mean-effective pressure (BMEP) and therefore potentially more efficiently. EPA received a request from Automotive Cylinder Deactivator System (ACDS) to perform a 511 evaluation of their cylinder deactivator. Section 511 of the Motor Vehicle Information and Cost Savings Act (15 USC 2011) requires EPA to evaluate fuel economy. Retrofit devices with regard to both emissions and fuel economy, and to publish the results in the Federal Register. Such an evaluation is based upon valid test data submitted by the manufacturer and, if required, EPA testing.
Notes
"EPA-AA-TEB-81-7." Cover title. "October 1980."