Title:
NO TO NO2 CONVERSION CONTROL IN A COMPRESSION INJECTION ENGINE BY HYDROCARBON INJECTION DURING THE EXPANSION STROKE
Document Type and Number:
WIPO Patent Application WO1999030025
Kind Code:
A9
Abstract:
The invention is directed towards a method for adjusting the NO2 to NO content of a diesel engine's exhaust without affecting engine performance. The NO2 to NO ratio is adjusted by varying the amount and timing of secondary hydrocarbon injection during the engine's expansion stroke. The appropriate amount of secondary injected hydrocarbon and the appropriate injection timing are determined from calibration values obtained by direct engine measurements and the desired NO2:NO ratio.
Inventors:
WEISSMAN WALTER
DEAN ANTHONY MARION
PINK HARRY STUARD
DEAN ANTHONY MARION
PINK HARRY STUARD
Application Number:
PCT/US1998/026090
Publication Date:
October 28, 1999
Filing Date:
December 09, 1998
Export Citation:
Assignee:
EXXON RESEARCH ENGINEERING CO (US)
International Classes:
F02D41/40; F02M45/02; F02B3/06; (IPC1-7): F02D41/40; F02M45/02
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