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Title: Adaptive engine injection for emissions reduction

NOx and soot emissions from internal combustion engines, and in particular compression ignition (diesel) engines, are reduced by varying fuel injection timing, fuel injection pressure, and injected fuel volume between low and greater engine loads. At low loads, fuel is injected during one or more low-pressure injections occurring at low injection pressures between the start of the intake stroke and approximately 40 degrees before top dead center during the compression stroke. At higher loads, similar injections are used early in each combustion cycle, in addition to later injections which preferably occur between about 90 degrees before top dead center during the compression stroke, and about 90 degrees after top dead center during the expansion stroke (and which most preferably begin at or closely adjacent the end of the compression stroke). These later injections have higher injection pressure, and also lower injected fuel volume, than the earlier injections.
Authors:
 [1]
  1. (Madison, WI): Sun, Yong (Madison, WI)
Publication Date:
OSTI Identifier:
985713
Report Number(s):
7,464,690
US patent application 11/754,402
DOE Contract Number:
FC26-06NT42628
Resource Type:
Patent
Research Org:
University of Wisconsin System
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS