Fuel injection control during start-up

Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means

Reexamination Certificate

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C123S00100A, C123S305000

Reexamination Certificate

active

07921833

ABSTRACT:
A method of operation of an internal combustion engine including an intake valve coupled to a combustion chamber, and a port fuel injector positioned upstream of the intake valve in an intake manifold including a throttle, the port fuel injector fluidly coupled to a fuel rail included in a fuel delivery system housing a fuel at least partially composed of alcohol. The method including, during a start-up operation when the temperature of the engine is below a threshold value and fuel is actively being injected into the intake manifold, adjusting a cone angle of a fuel spray from the port fuel injector, via adjustment of the throttle and/or fuel delivery system, based on the position of the intake valve.

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patent: 6769625 (2004-08-01), Peterson, Jr.
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patent: 7303144 (2007-12-01), Alyanak
patent: 7694666 (2010-04-01), Lewis et al.
patent: 7721710 (2010-05-01), Leone et al.
patent: 2007/0119425 (2007-05-01), Lewis et al.
patent: 2007/0215069 (2007-09-01), Leone
patent: 2008/0283023 (2008-11-01), Lewis et al.

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