NOx REDUCTION GENERATION IN A COMPRESSION-IGNITION ENGINE BY HYDROCARBON INJECTION DURING THE EXPANSION STROKE
Application IN/PCT/2000/00047/MUM published 2007-01-19, filed 2000-05-31
The invention relates to a method for producing NOx reductants by injecting hydrocarbon into a diesel engine's combustion chamber during the expansion cycle. The secondary injected hydrocarbon is formed, under appropriate conditions, into oxygenates and olefins that are suitable for reducing NOx species in the presence of conventional exhaust catalysts. The appropriate injection timing is obtained by referring to a calibration obtained by direct engine measurements.
Applicant
1)EXXON RESEARCH AND ENGINEERING COMPANY
:180 PARK AVENUE, P O BOX 390, FLORHAM PARK, NEW JERSEY 07932-0390, U.S.A.
Inventor
1)WALTER WEISSMAN 2)FRANK HERSHKOWITZ 3)ANTHONY MARION DEAN 4)HARRY STUARD PINK
International Info
Classification: F02D41/40, F02M45/02
Publication Number: WO 99/30024 A1
Application Date: 1998-12-09
Priority Information
08/988,417 U.S.A. 1997-12-10