Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2006-08-01
2010-06-01
Solis, Erick (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C123S491000, C123S090150
Reexamination Certificate
active
07726289
ABSTRACT:
In at least a first cycle at startup, an opening timing of an exhaust valve is controlled to 45 degrees before-bottom-dead-center of an exhaust stroke, or to a retard side of the normal closing timing that is set after warm-up is complete. Also, the closing timing of the exhaust valve is preferably controlled to an advance side of top-dead-center in a second cycle at startup and thereafter at the latest. Accordingly, the amount of unburned HC discharged during a cold start of an internal combustion engine is reduced.
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Foreign Office Action issued Mar. 26, 2009 for Japanese Patent Application No. 2005-224042 (with translation).
Ichinose Hiroki
Katou Yuuichi
Murase Nao
Oliff & Berridg,e PLC
Solis Erick
Toyota Jidosha & Kabushiki Kaisha
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