Selectably fueling with natural gas or direct injection ethanol
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United States of America Patent
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Jun 16, 2009
Grant Date -
N/A
app pub date -
Apr 29, 2008
filing date -
Apr 29, 2008
priority date (Note) -
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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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