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Title: Internal combustion engine using premixed combustion of stratified charges

Abstract

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.

Inventors:
 [1];  [2]
  1. Rochester Hills, MI
  2. Madison, WI
Issue Date:
Research Org.:
Wisconsin Alumni Research Foundation
Sponsoring Org.:
USDOE
OSTI Identifier:
982800
Patent Number(s):
6668789
Application Number:
09/935,937
Assignee:
Wisconsin Alumni Research Foundation (Madison, WI)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02B - INTERNAL-COMBUSTION PISTON ENGINES
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
DOE Contract Number:  
FG04-00AL66549
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Marriott, Craig D, and Reitz, Rolf D. Internal combustion engine using premixed combustion of stratified charges. United States: N. p., 2003. Web.
Marriott, Craig D, & Reitz, Rolf D. Internal combustion engine using premixed combustion of stratified charges. United States.
Marriott, Craig D, and Reitz, Rolf D. Tue . "Internal combustion engine using premixed combustion of stratified charges". United States. https://www.osti.gov/servlets/purl/982800.
@article{osti_982800,
title = {Internal combustion engine using premixed combustion of stratified charges},
author = {Marriott, Craig D and Reitz, Rolf D},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {12}
}

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Works referenced in this record:

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