Title: Engine system and method of operating same over multiple engine load ranges

Abstract

A method of operating an engine system should produce relatively low concentrations of various emissions without compromising a desired power output of the system. In order to operate an engine system of the present disclosure, a predetermined total amount of fuel injected into at least one combustion chamber is apportioned into at least a first amount and a second amount of fuel. The first amount of fuel is injected into the at least one combustion chamber during non-auto ignition conditions. The second amount of fuel is injected into the at least one combustion chamber during auto-ignition conditions. When the engine system is in a mid-low engine load range, the second amount of fuel is one of equal to or less than 15% of the predetermined total amount of fuel. When the engine system is in a high engine load range, the second amount of fuel is greater than 15% of the predetermined total amount of fuel.

Inventors:

Duffy, Kevin P.; Urven, Jr., Roger L.; Brown, Cory A.; Kesse, Mary L.

Issue Date:

2007-05-22

Research Org.:

Caterpillar Inc., Deerfield, IL (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1531530

Patent Number(s):

7219649

Application Number:

11/201,238

Assignee:

Caterpillar Inc. (Peoria, IL)

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

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F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D41/3035 - {a mode being the premixed charge compression-ignition mode}
F02D41/402 - {Multiple injections}
F02D41/405 - {with post injections}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

F02M2200/46 - Valves, e.g. injectors, with concentric valve bodies
F02M47/027 - {Electrically actuated valves draining the chamber to release the closing pressure}
F02M61/1806 - {characterised by the arrangement of discharge orifices, e.g. orientation or size}
F02M63/0015 - {electrical, e.g. using solenoid}
F02M63/0064 - {Two or more actuators acting on two or more valve bodies}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

Y02T10/40 - Engine management systems

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DOE Contract Number:  

FC05-97OR22605

Resource Type:

Patent

Resource Relation:

Patent File Date: 2005-08-10

Country of Publication:

United States

Language:

English