Intake mixture motion and cold start fuel vapor enrichment...

Details Intake mixture motion and cold start fuel vapor enrichment... Intake mixture motion and cold start fuel vapor enrichment...

2006-07-25

2006-07-25

Huynh, Hai (Department: 3747)

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

C123S179180, C123S520000, C123S491000

Reexamination Certificate

active

07080626

ABSTRACT:
An engine system includes an engine having an intake manifold, a cylinder and an intake mixture motion system. The intake mixture motion system includes a plate disposed upstream of the cylinder and an actuator that moves the plate between an open position and a closed position to direct cylinder air flow. The plate is in the closed position for a predetermined period after engine start-up. A fuel system communicates with the engine and supplies a first quantity of liquid fuel to the engine at a first A/F ratio. The fuel system supplies a second quantity of vapor fuel to the engine at a second A/F ratio to provide a fuel mixture having a third A/F ratio during the predetermined period.

REFERENCES:
patent: 6234153 (2001-05-01), DeGroot et al.
patent: 6318345 (2001-11-01), Weber et al.
patent: 6371094 (2002-04-01), Wagner
patent: 6769418 (2004-08-01), Reddy
patent: 2005/0066939 (2005-03-01), Shimada et al.

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