Record Display for the EPA National Library Catalog


Main Title Control of Nitrogen Oxide Emissions from Diesel Engines: A Theoretical Analysis.
Author Bastres, E. K. ; Chn, K. M. ; Di, D. M. ; Mura, R. J. ;
CORP Author Northern Research and Engineering Corp., Cambridge, Mass.
Year Published 1971
Report Number NREC-1160-1; EHS-70-116; 0906;
Stock Number PB-206 005
Additional Subjects ( Diesel engines ; Exhaust gases) ; ( Air pollution ; Nitrogen oxides) ; ( Exhaust gases ; Nitrogen oxides) ; Mathematical models ; Design criteria ; Combustion ; Fuel injectors ; Automobile engines ; Diesel engine exhaust ; Air pollution control
Library Call Number Additional Info Location Last
NTIS  PB-206 005 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 106p
The report is concerned with the control of NOx emissions from diesel engines. The objective was to correlate engine design, performance, and emission characteristics by theoretical analysis, and to develop NOx-control criteria. Mathematical models of combustion and NO formation in diesel engines were developed; engine design, performance, and emission characteristics were correlated; and methods for controlling NO emissions were identified and evaluated. In direct-injection engines, NO emission rate is found to vary monotonically with fuel injection time, injection rate, and over-all fuel-air ratio. Qualitative guidelines have been defined for reducing NO emissions by manipulation of these design variables while minimizing the associated penalties in engine performance. The tendency for indirect-injection engines to produce lower NO emissions than direct-injection engines has been confirmed by the model. The direct-injection engine model has been used to evaluate turbo-charging, pilot injection, and fumigation as methods for reducing NO emissions. Of the approaches considered, only fumigation was found to decrease NO emissions.