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Title: Fuel mixture stratification as a method for improving homogeneous charge compression ignition engine operation

Abstract

A method for slowing the heat-release rate in homogeneous charge compression ignition ("HCCI") engines that allows operation without excessive knock at higher engine loads than are possible with conventional HCCI. This method comprises injecting a fuel charge in a manner that creates a stratified fuel charge in the engine cylinder to provide a range of fuel concentrations in the in-cylinder gases (typically with enough oxygen for complete combustion) using a fuel with two-stage ignition fuel having appropriate cool-flame chemistry so that regions of different fuel concentrations autoignite sequentially.

Inventors:
 [1];  [1]
  1. Livermore, CA
Publication Date:
Research Org.:
Sandia National Laboratories (SNL-CA), Livermore, CA
Sponsoring Org.:
USDOE
OSTI Identifier:
908050
Patent Number(s):
7,128,046
Application Number:
11/095,256
Assignee:
a National Laboratories (Livermore, CA)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Dec, John E, and Sjoberg, Carl-Magnus G. Fuel mixture stratification as a method for improving homogeneous charge compression ignition engine operation. United States: N. p., 2006. Web.
Dec, John E, & Sjoberg, Carl-Magnus G. Fuel mixture stratification as a method for improving homogeneous charge compression ignition engine operation. United States.
Dec, John E, and Sjoberg, Carl-Magnus G. Tue . "Fuel mixture stratification as a method for improving homogeneous charge compression ignition engine operation". United States. https://www.osti.gov/servlets/purl/908050.
@article{osti_908050,
title = {Fuel mixture stratification as a method for improving homogeneous charge compression ignition engine operation},
author = {Dec, John E and Sjoberg, Carl-Magnus G},
abstractNote = {A method for slowing the heat-release rate in homogeneous charge compression ignition ("HCCI") engines that allows operation without excessive knock at higher engine loads than are possible with conventional HCCI. This method comprises injecting a fuel charge in a manner that creates a stratified fuel charge in the engine cylinder to provide a range of fuel concentrations in the in-cylinder gases (typically with enough oxygen for complete combustion) using a fuel with two-stage ignition fuel having appropriate cool-flame chemistry so that regions of different fuel concentrations autoignite sequentially.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {10}
}

Patent:

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Works referenced in this record:

Isolating the Effects of Fuel Chemistry on Combustion Phasing in an HCCI Engine and the Potential of Fuel Stratification for Ignition Control
conference, March 2004

  • Dec, John E.; Sjöberg, Magnus
  • SAE 2004 World Congress & Exhibition, SAE Technical Paper Series
  • DOI: 10.4271/2004-01-0557