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Internal combustion engine using premixed combustion of stratified charges

Patent ·
OSTI ID:982800
 [1];  [2]
  1. Rochester Hills, MI
  2. Madison, WI
+ Show Author Affiliations
During a combustion cycle, a first stoichiometrically lean fuel charge is injected well prior to top dead center, preferably during the intake stroke. This first fuel charge is substantially mixed with the combustion chamber air during subsequent motion of the piston towards top dead center. A subsequent fuel charge is then injected prior to top dead center to create a stratified, locally richer mixture (but still leaner than stoichiometric) within the combustion chamber. The locally rich region within the combustion chamber has sufficient fuel density to autoignite, and its self-ignition serves to activate ignition for the lean mixture existing within the remainder of the combustion chamber. Because the mixture within the combustion chamber is overall premixed and relatively lean, NO.sub.x and soot production are significantly diminished.
Research Organization:
Wisconsin Alumni Research Foundation
Sponsoring Organization:
USDOE
DOE Contract Number:
FG04-00AL66549
Assignee:
Wisconsin Alumni Research Foundation (Madison, WI)
Patent Number(s):
6,668,789
Application Number:
09/935,937
OSTI ID:
982800
Country of Publication:
United States
Language:
English

References (7)

Directly Injected Natural Gas Fueling of Diesel Engines
  • Hodgins, K. Bruce; Hill, Philip G.; Ouellette, Patric
  • Future Transportation Technology Conference & Exposition, SAE Technical Paper Series https://doi.org/10.4271/961671
conference August 1996
Ignition Delay and Combustion Duration with Natural Gas Fueling of Diesel Engines
  • Mtui, Peter L.; Hill, Philip G.
  • 1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition, SAE Technical Paper Series https://doi.org/10.4271/961933
conference October 1996
Experimental Investigation of Direct Injection-Gasoline for Premixed Compression Ignited Combustion Phasing Control conference March 2002
Effects of Injection Changes on Efficiency and Emissions of a Diesel Engine Fueled by Direct Injection of Natural Gas conference June 2000
New Combustion Concept for Ultra-Clean and High-Efficiency Small DI Diesel Engines conference October 1999
Relating Burning Rate and NO Formation to Pressure Development in Two-Stroke Diesel Engines journal June 1997
NOx Emissions From a Diesel Engine Fueled With Natural Gas journal December 1995

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