OLS : Record


Main Title Determination of percentages of vehicles operating in the cold start mode / prepared for Environmental Protection Agency, Office of Air and Waste Management, Office of Air Quality Planning and Standards.
Author Midurski, Theodore P.; Castaline, Alan H.
CORP Author GCA Corp., Bedford, MA. GCA Technology Div.;Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher Office of Air Quality Planning and Standards ; National Technical Information Service [distributor],
Place Published Research Triangle Park, N.C. Springfield, Va.
Year Published 1977
Report Number EPA-450/3-77-023; GCA-TR-77-19-G; EPA-68-02-1376
Stock Number PB-288 860
OCLC Number 08265435
Subjects Air pollution; Exhaust emissions; Hydrocarbons; Carbon monoxide; Data analysis; Tests; Sites; Concentration(Composition); Light duty vehicles; Cold mode operation; Air fuel ratio; Federal test procedure
Subject Added Ent Automobiles--Cold weather operation.; Automobiles--Motors--Exhaust gas.
Internet Access
Description Access URL
Library   Call Number Additional Info Location Date Modified
EJBD ARCHIVE EPA 450-3-77-023 Headquarters Library/Washington,DC 05/20/2013
EJBD EPA 450-3-77-023 c.1 Headquarters Library/Washington,DC 04/25/2014
EKBD EPA-450/3-77-023 Research Triangle Park Library/RTP, NC 09/10/1999
ELCD EPA-450/3-77-023 NVFEL Library/Ann Arbor, MI 09/24/2004
EOAD EPA 450/3-77-023 Region 8 Technical Library/Denver,CO 06/04/2004
ESAD EPA 450-3-77-023 Region 10 Library/Seattle,WA 03/23/2010
NTIS PB-288 860 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation xiii, 99 p. : ill. ; 28 cm.
Abstract Estimates of the percentages of vehicles operating in less than the stabilized condition (i.e., cold mode) have been made for 60 locations in the Pittsburgh and Providence regions. These estimates were derived using detailed regional travel data for both regions. Accurate knowledge of the percentages of vehicles operating in the cold mode at a particular study location is a key factor in estimating carbon monoxide emissions. That carbon monoxide emission rates are severely affected by operation in the prestabilized condition has been well documented through numerous laboratory studies. While these laboratory studies have served to characterize carbon monoxide emissions from cold operating vehicles with respect to variables such as ambient temperatures and cold soak duration, the study being reported here examines specific traffic streams to identify the actual percentages of vehicles that are operating in the cold mode. Cold start percentages are presented for the morning commuter hours, the mid-day period, the evening commuter hours, and the evening and early morning off-peak period for each of the 60 traffic streams analyzed. Results indicate that the percentage of cold operating vehicles is highly variable both among locations within an urban area, and during different time periods at any specific location. It is also indicated that the actual percentages of vehicles operating in the cold mode may be somewhat different from the percentages assumed in the Federal Test Procedure.
Notes "GCA Corporation, GCA Technology Division." "August 1977." Includes bibliographical references. "Contract no. 68-02-1376, task order 29." "EPA-450/3-77-023."
Access Notes Also available via the World Wide Web.
Author Added Ent
Castaline, Alan H.
Corporate Au Added Ent United States. Environmental Protection Agency. Office of Air Quality Planning and Standards.; GCA Corporation. Technology Division.
PUB Date Free Form 1977
NTIS Prices PC A06/MF A01
BIB Level m
OCLC Time Stamp 20130513102238
Cataloging Source OCLC/T
Language eng
SUDOCS Number EP 1.2:V 53/11
Origin OCLC
OCLC Rec Leader 01664cam 2200385Ia 45020