||Analysis of timing and carburetion calibrations /
Forrest, L. ;
Clifford, J. M. ;
Smalley., W. M.
||Aerospace Corp., El Segundo, Calif. Mobile Systems Group.;Environmental Protection Agency, Ann Arbor, Mich. Emission Control Technology Div.
|| Technical Publications Branch, Office of Administration, Environmental Protection Agency,
||EPA/460-3-76-028; ATR-77(7358-01)-1; EPA-68-01-0417
Internal combustion engines ;
Ignition time ;
Fuel consumption ;
Air pollution ;
Air flow ;
Reaction time ;
Computer programs ;
Computerized simulation ;
VEHSIM computer program ;
Fortran 4 programming language ;
Air fuel ratio
||NVFEL Library/Ann Arbor, MI
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||230 pages : illustrations ; 28 cm
This was a two-part study effort. In the first part, an evaluation was made of vehicle simulation computer programs to determine and select the best program for EPA use in conducting various analyses of automobile fuel economy and emissions effects. The programs considered were (1) a DOT simulation routine called VEHSIM, (2) a program developed by the University of Wisconsin, and (3) a program developed by The Aerospace Corporation. The DOT VEHSIM program was picked primarily because it provides exceptional flexibility and ease of operation, and because it appeared to be readily adaptable to modifications required for the analysis of timing and carburetion calibrations in part two of this study. The latter effort entailed the determination and calculation of factors representing the fuel economy influence of ignition timing and carburetor calibration differences in certification test vehicles. Using the VEHSIM program with auxiliary programs VSIMI and VSIMII, specific calculations were made for distributor and carburetor calibration curves representing equipment in 1976 model year cars. (Portions of this document are not fully legible)
"October 1976." "EPA/460-3-76-028." "Contract No. 68-01-0417." "Emission Control Technology Division, Office of Air and Waste Management, Environmental Protection Agency." PB-283 953.