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Main Title

I/M test variability observed in the Louisville I/M program /

Author

Landman, Larry C. ; Landman, L. C.

CORP Author

Environmental Protection Agency, Ann Arbor, MI. Emission Control Technology Div.

Publisher

U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Mobile Sources, Emission Control Technology Division, Technical Support Staff,

Year Published

1990

Report Number

EPA-AA-TSS-I/M-90-7

Stock Number

PB90-261470

OCLC Number

772232087

Subjects

Automobiles--Pollution control devices--Inspection--Kentucky--Louisville ; Automobiles--Kentucky--Louisville--Pollution control devices--Maintenance and repair

Additional Subjects

Exhaust emissions ; Internal combustion engines ; Tests ; Failure ; Inspection and maintenance tests ; Preconditioning cycles ; Immediate retests

Internet Access

Description	Access URL
	https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9100Y0ON.PDF

Holdings

Library	Call Number	Additional Info	Location	Last Modified	Checkout Status
ELCD	EPA AA-TSS-I/M-90-7		NVFEL Library/Ann Arbor, MI	01/17/2012	DISPERSAL
NTIS	PB90-261470	Some EPA libraries have a fiche copy filed under the call number shown.		07/26/2022

Collation

iii, 32, A-9, B-9 p. ; 28 cm.

Abstract

271 vehicles from the 1981 through 1988 model years that failed their regularly scheduled I/M test received extra tests while still in the inspection lane. Those extra tests consisted of an immediate retest (i.e., a second chance test) and a similar test preceded by three minutes of 2500 rpm, no-load operation. Analysis of the test results shows that the three-minute, 2500 rpm, no-load preconditioning cycle added very little over simply an immediate retest for most of the vehicles in the study; however, that preconditioning cycle did have a significant effect in reducing the failure rate of those vehicles that exceeded only the HC standard on the initial test.

Notes

Technical report. "August 1990." "EPA-AA-TSS-I/M-90-7." Cover title. Includes bibliographical references.

Place Published

Ann Arbor, Mich.

Supplementary Notes