||Federal test procedure and short test correlation analyses /
Hinton, M. G. ;
Thacker, J. C. ;
Lee., W. B. ;
||Aerospace Corp., El Segundo, Calif. Mobile Systems Group.;Environmental Protection Agency, Ann Arbor, Mich. Emission Control Technology Div.
|| U.S. Environmental Protection Agency, Office of Air and Waste Management, Office of Mobile Source Air Pollution Control, Emission Control Technology Division,
||EPA-460/3-76-011; ATR-76(7353)-1; EPA-68-01-0417
Automobiles--Motors--Exhaust gas--Analysis ;
Air pollution ;
Motor vehicles ;
Exhaust emissions ;
Statistical analysis ;
Numerical solutions ;
Air pollution control ;
Carbon monoxide ;
Nitrogen oxides ;
Error analysis ;
Federal test procedure ;
Air quality ;
Catalytic reactors(Exhaust system)
||NVFEL Library/Ann Arbor, MI
||Some EPA libraries have a fiche copy filed under the call number shown.
||1 v. (Various pagings) : charts ; 28 cm.
A series of statistical analyses was performed to determine the degree of 'correlation' that exists between five specific short tests (STs) and the federal emission certification test procedure (FTP) for new vehicles. This work was performed to determine if 'reasonable correlation with certification test procedures' exists; this is a condition precedent to the promulgation of regulations that impose the in-use warranty provisions of Sec. 207 (b) of the Clean Air Act of 1970 upon the motor vehicle manufacturers. The basis for the analyses was ST and FTP test data from three vehicle fleets: (a) a catalyst-equipped experimental vehicle fleet (40 vehicles), (b) an in-use 1974 model year vehicle fleet (147 vehicles), and (c) a catalyst-equipped defect test fleet (5 vehicles). Each of the vehicles in these fleets was tested by the FTP and the following STs: (a) Federal Short Cycle, (b) New York/New Jersey (NY/NJ) Composite, (c) Clayton Key Mode, (d) Federal Three-Mode, and (e) Unloaded 2500 rpm. Hydrocarbon (HC) and carbon monoxide (CO) measurements were recorded with both laboratory analyzers and garage-type instruments for most of the volumetric tests. All oxides of nitrogen (NOx) measurements were made with laboratory analyzers. Two different statistical analysis methods were used to assess 'correlation'--a conventional correlation analysis and a contingency table analysis.
"EPA-460/3-76-011." "April 1976." "Contract No. 68-01-0417"--T.p. "EPA Project Officer: F. Peter Hutchins"--T.p.