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1. (WO2007021336) ENGINE SYSTEM AND METHOD OF OPERATING SAME OVER MULTIPLE ENGINE LOAD RANGES

Pub. No.:    WO/2007/021336    International Application No.:    PCT/US2006/017088
Publication Date: Fri Feb 23 00:59:59 CET 2007 International Filing Date: Thu May 04 01:59:59 CEST 2006
IPC: F02D 41/30
F02D 41/40
Applicants: CATERPILLAR INC.
DUFFY, Kevin, P.
URVEN, Roger, L. Jr.
BROWN, Cory, A.
KESSE, Mary, L.
Inventors: DUFFY, Kevin, P.
URVEN, Roger, L. Jr.
BROWN, Cory, A.
KESSE, Mary, L.
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.