Selectably fueling with natural gas or direct injection ethanol

Details Selectably fueling with natural gas or direct injection ethanol Selectably fueling with natural gas or direct injection ethanol

2008-04-29

2009-06-16

Solis, Erick (Department: 3747)

Internal-combustion engines

Charge forming device

Combined liquid and gaseous fuel

C123S526000, C123S529000, C123S576000, C123S577000

Reexamination Certificate

active

07546834

ABSTRACT:
Various approaches are described for controlling operation of an engine. One example method includes delivering a gaseous fuel to the engine during a first operating range when an amount of stored gaseous fuel is greater than a threshold; and disabling the delivery of the gaseous fuel during the first operating range when the amount of stored gaseous fuel is less than the threshold and delivering a second fuel to operate the engine, yet continuing to deliver the gaseous fuel to start the engine during a cold start even when the amount of stored gaseous fuel is less than the threshold.

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