Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Phase 2 of the Advanced Collaborative Emissions Study.
Author I. A. Khalek ; M. G. Blanks ; P. M. Merritt
CORP Author Southwest Research Inst., San Antonio, TX.; Coordinating Research Council, Inc., Alpharetta, GA.; Health Effects Inst., Boston, MA.; Environmental Protection Agency, Washington, DC.; California State Air Resources Board, Sacramento.
Year Published 2013
Report Number SWRI-03-17124
Stock Number PB2014-103456
Additional Subjects Emission control systems ; Diesel engines ; Air pollution control ; Carbon dioxide ; Diesel fuels ; Exhaust gases ; Nitrogen oxides ; Test procedures ; Advanced Collaborative Emissions Study(ACES) ; Heavy duty diesel engine(HHDDE)
Library Call Number Additional Info Location Last
NTIS  PB2014-103456 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 07/30/2014
Collation 94p
ACES Phase 2 demonstrates another large step in emissions reduction with 2010 EPA-compliant on-highway heavy heavy-duty diesel engines. The 2010-compliant engines showed substantially lower regulated emissions of NOX, CO, NMHC, and PM relative to the 2010 standard. They also showed a substantial reduction in a very wide spectrum of particle and gas phase unregulated emissions species relative to pre-2007 and 2007 technology engines. The observed reductions in PM (total mass, soot, and number) and unregulated emissions from 2007 to 2010 engines are likely due to differences in active DPF regeneration operation. The 2007 engines triggered multiple regeneration events during the 16-hour cycles, while the 2010 engines did not trigger any events. The improvement/reduction in regeneration was achieved through some combination of lower engine-out PM, increased passive regeneration and improved control strategies. PM emissions during regeneration events have been observed to be higher than normal operation for the 2007 engines used in ACES Phase 1. Unregulated emissions are believed to be higher during regeneration events. Thus, the results from the 2007 engines include emissions measured over both normal (no active regeneration) and regeneration operation, while the results from the 2010 engines only include emissions measured over normal operation.