Record Display for the EPA National Library Catalog

RECORD NUMBER: 8 OF 8

Main Title

Summary of ECTD Emission Laboratory Correlation Programs Fiscal Year 1974.

Author

Lowery., Richard E. ;

CORP Author

Environmental Protection Agency, Ann Arbor, Mich. Standards Development and Support Branch.

Year Published

1974

Report Number

CORR-74-10;

Stock Number

PB-270 592

Additional Subjects

Motor vehicles ; Exhaust emissions ; Data acquisition ; Laboratories ; Methodology ; Test facilities ; Correlation ; Dynamometers ; Dynamic tests ; Regression analysis ; Vehicles ; Variations ; Accuracy ; Data processing ; Test methods

Holdings

Library	Call Number	Additional Info	Location	Last Modified	Checkout Status
NTIS	PB-270 592	Some EPA libraries have a fiche copy filed under the call number shown.		07/26/2022

Collation

21p

Abstract

This report summarizes the results of ECTD 1974 laboratory vehicle emission correlation programs, with conclusions relative to the state of current emission laboratory correlation. Data are presented and analyzed which show site-to-site correlation demonstrated during ECTD programs. Regression analyses are presented which detect the effect of barometric pressure and ambient humidity on correlation results. Other factors influencing the degree of site-to-site correlation, namely dynamometer characteristics, vehicle variability, CVS accuracy, and gas analysis accuracy, are presented and discussed.