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

Abstract

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:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1415024
Patent Number(s):
9850812
Application Number:
14/506,766
Assignee:
Wisconsin Alumni Research Foundation (Madison, WI)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Oct 06
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Reitz, Rolf Deneys, Hanson, Reed M., Splitter, Derek A., and Kokjohn, Sage. Engine combustion control at low loads via fuel reactivity stratification. United States: N. p., 2017. Web.
Reitz, Rolf Deneys, Hanson, Reed M., Splitter, Derek A., & Kokjohn, Sage. Engine combustion control at low loads via fuel reactivity stratification. United States.
Reitz, Rolf Deneys, Hanson, Reed M., Splitter, Derek A., and Kokjohn, Sage. Tue . "Engine combustion control at low loads via fuel reactivity stratification". United States. https://www.osti.gov/servlets/purl/1415024.
@article{osti_1415024,
title = {Engine combustion control at low loads via fuel reactivity stratification},
author = {Reitz, Rolf Deneys and Hanson, Reed M. and Splitter, Derek A. and Kokjohn, Sage},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {12}
}

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Works referenced in this record:

Gasoline Engine
patent-application, June 2010


Internal Combustion Engine
patent-application, October 2010


An Experimental Investigation of Fuel Reactivity Controlled PCCI Combustion in a Heavy-Duty Engine
journal, April 2010


Fuel Effects on Reactivity Controlled Compression Ignition (RCCI) Combustion at Low Load
journal, April 2011


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


Fuel Reactivity Controlled Compression Ignition (RCCI) Combustion in Light- and Heavy-Duty Engines
journal, April 2011


Use of Detailed Kinetics and Advanced Chemistry-Solution Techniques in CFD to Investigate Dual-Fuel Engine Concepts
journal, April 2011


An Optical Investigation of Ignition Processes in Fuel Reactivity Controlled PCCI Combustion
journal, April 2010


High Efficiency, Low Emissions RCCI Combustion by Use of a Fuel Additive
journal, August 2010