Fuel system degradation test using two fuel tanks
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United States of America Patent
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Jul 21, 2015
Grant Date -
Apr 17, 2014
app pub date -
Oct 17, 2012
filing date -
Oct 17, 2012
priority date (Note) -
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Abstract
Embodiments for monitoring fuel system degradation are provided. In one example, a method for a vehicle comprises evacuating fuel from a first fuel tank to a second fuel tank, and indicating fuel system degradation in response to a change in fuel system pressure following the evacuation of fuel. In this way, fuel system degradation may be indicated without use of a separate pressure building device.
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