Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer
Reexamination Certificate
2006-10-30
2008-05-27
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Charge forming device
Gaseous fuel and air mixer
C123S472000, C123S316000
Reexamination Certificate
active
07377267
ABSTRACT:
A method is provided for an engine capable of burning gaseous fuel, the engine also including a combustion chamber, a fuel supply system with at least one fuel tank, at least one intake valve, and at least one exhaust valve, an injector to directly inject gaseous fuel into the combustion chamber, and an exhaust oxygen sensor. The method comprises directly injecting fuel from the injector into the chamber at a variable supply pressure which decreases as fuel tank pressure decreases; and adjusting at least one of an injection time and duration based at least on said variable pressure and information from the exhaust oxygen sensor.
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Boyer Brad
Stockhausen William
Ali Hyder
Alleman Hall McCoy Russell & Tuttle LLP
Cronin Stephen K.
Ford Global Technologies LLC
Voutyras Julia
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