Global to push GA events into
skip to main content

Title: Engine combustion control at low loads via fuel reactivity stratification

A compression ignition (diesel) engine uses two or more fuel charges during a combustion cycle, with the fuel charges having two or more reactivities (e.g., different cetane numbers), in order to control the timing and duration of combustion. By appropriately choosing the reactivities of the charges, their relative amounts, and their timing, combustion can be tailored to achieve optimal power output (and thus fuel efficiency), at controlled temperatures (and thus controlled NOx), and with controlled equivalence ratios (and thus controlled soot). At low load and no load (idling) conditions, the aforementioned results are attained by restricting airflow to the combustion chamber during the intake stroke (as by throttling the incoming air at or prior to the combustion chamber's intake port) so that the cylinder air pressure is below ambient pressure at the start of the compression stroke.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1160220
Assignee:
Wisconsin Alumni Research Foundation (Madison, WI) SNL-A
Patent Number(s):
8,851,045
Application Number:
13/077,378
Contract Number:
AC04-94AL85000
Resource Relation:
Patent File Date: 2011 Mar 31
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS

Works referenced in this record:

Internal Combustion Engine
patent-application, October 2010

Dual-Fuel PCI Combustion Controlled by In-Cylinder Stratification of Ignitability
conference, April 2006

Experiments and Modeling of Dual-Fuel HCCI and PCCI Combustion Using In-Cylinder Fuel Blending
journal, October 2009
  • Kokjohn, Sage L.; Hanson, Reed M.; Splitter, Derek A.
  • SAE International Journal of Engines, Vol. 2, Issue 2, p. 24-39
  • DOI: 10.4271/2009-01-2647

An Experimental Investigation of Fuel Reactivity Controlled PCCI Combustion in a Heavy-Duty Engine
journal, April 2010
  • Hanson, Reed M.; Kokjohn, Sage L.; Splitter, Derek A.
  • SAE International Journal of Engines, Vol. 3, Issue 1, p. 700-716
  • DOI: 10.4271/2010-01-0864

An Optical Investigation of Ignition Processes in Fuel Reactivity Controlled PCCI Combustion
journal, April 2010
  • Splitter, Derek; Kokjohn, Sage; Rein, Keith
  • SAE International Journal of Engines, Vol. 3, Issue 1, p. 142-162
  • DOI: 10.4271/2010-01-0345

High Efficiency, Low Emissions RCCI Combustion by Use of a Fuel Additive
journal, August 2010
  • Splitter, Derek; Reitz, Rolf D.; Hanson, Reed
  • SAE International Journal of Fuels and Lubricants, Vol. 3, Issue 2, p. 742-756
  • DOI: 10.4271/2010-01-2167

Use of Detailed Kinetics and Advanced Chemistry-Solution Techniques in CFD to Investigate Dual-Fuel Engine Concepts
journal, April 2011
  • Puduppakkam, Karthik V.; Liang, Long; Naik, Chitralkumar V.
  • SAE International Journal of Engines, Vol. 4, Issue 1, p. 1127-1149
  • DOI: 10.4271/2011-01-0895

Fuel Effects on Reactivity Controlled Compression Ignition (RCCI) Combustion at Low Load
journal, April 2011
  • Hanson, Reed; Kokjohn, Sage; Splitter, Derek
  • SAE International Journal of Engines, Vol. 4, Issue 1, p. 394-411
  • DOI: 10.4271/2011-01-0361

Fuel Reactivity Controlled Compression Ignition (RCCI) Combustion in Light- and Heavy-Duty Engines
journal, April 2011
  • Kokjohn, Sage; Hanson, Reed; Splitter, Derek
  • SAE International Journal of Engines, Vol. 4, Issue 1, p. 360-374
  • DOI: 10.4271/2011-01-0357