Record Display for the EPA National Library Catalog


Main Title Exhaust emissions from a vehicle equipped with the Roberts induction modification supplied under contract CPA 70-51 /
Author Thomson, John C.
CORP Author Environmental Protection Agency, Ann Arbor, Mich. Div. of Motor Vehicle Research and Development.
Publisher Division of Motor Vehicle Research and Development, National Air Pollution Control Administration, Environmental Protection Agency,
Year Published 1970
Report Number 71-14; APTD-1428
Stock Number PB-218 652
OCLC Number 41231006
Subjects Motor vehicles--Pollution control devices--Testing
Additional Subjects ( Automobile engines ; Air pollution control equipment) ; Exhaust gases ; Air pollution ; Performance evaluation ; Carburetors ; Camshafts ; Intake systems ; Air pollution control ; Automobile exhaust
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA/APTD-1428 Research Triangle Park Library/RTP, NC 04/23/1999
ELBD ARCHIVE EPA APTD-1428 AWBERC Library/Cincinnati,OH 01/03/2024
ELCD  EPA TAEB-71-14 NVFEL Library/Ann Arbor, MI 05/07/2012 DISPERSAL
NTIS  PB-218 652 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 2, [4] leaves ; 28 cm
A 1970 Plymouth Duster, equipped with a 225 cu. in. six cylinder engine and automatic transmission was modified, with changes to the intake manifold, lean main jets in the carburetor and revised camshaft. The intake modification consisted of truncated cone inserts placed in each inlet port. The following standard emission tests were run: (1) standard 1970 Federal test procedure for exhaust emissions (FTP); (2) closed, constant volume sampling technique using 9 repeats of the 7-mode Federal emissions test cycle (CVS); (3) closed constant volume sampling technique using the LA4-S3 driving schedule as specified for 1972 and later. Performance tests were also conducted, consisting of wide open accelerations from 0-60 mph, 20-50 mph and 40-80 mph. The results indicate that the Roberts device: (1) caused no significant change in unburned hydrocarbons or carbon monoxide; (2) caused some (27%) reduction in oxides of nitrogen and (3) had a small detrimental effect on performance at high loads.
"December 1970." "71-14." "Division of Motor Vehicle Research and Development, National Air Pollution Control Administration, Environmental Protection Agency." PB-218 652. APTIC No. 50246.