Internal-combustion engines – Burning by highly compressed air – Oil engine air preheated
Reexamination Certificate
2007-12-04
2007-12-04
Argenbright, T. M. (Department: 3747)
Internal-combustion engines
Burning by highly compressed air
Oil engine air preheated
C123S299000, C123S304000, C123S525000, C123S568210
Reexamination Certificate
active
11277714
ABSTRACT:
A method and apparatus adjust pilot fuel injection timing in relation to a main fuel injection timing into a piston cylinder of an operating gaseous-fuelled direct injection internal combustion engine using high levels of EGR. A set of engine parameters are monitored which determine engine load and engine speed and an indicator of EGR concentration within the intake charge. Pilot fuel timing relative to main fuel injection timing is then adjusted according to the engine parameters. High levels of EGR are shown to be tolerated with relatively limited penalties in relation to other emissions typically found with high EGR by reducing the relative injection timing the pilot fuel as compared to main fuel injection timing.
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Bushe W. Kendal
McTaggart-Cowan Gordon P.
Munshi Sandeep
Rogak Steven N.
Argenbright T. M.
McAndrews Held & Malloy Ltd.
University of British Columbia
Westport Power Inc.
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