Vehicle method for barometric pressure identification
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United States of America Patent
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Apr 17, 2018
Grant Date -
Aug 25, 2016
app pub date -
May 3, 2016
filing date -
Oct 22, 2012
priority date (Note) -
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Abstract
A vehicle method for barometric pressure identification, including adjusting engine operation responsive to barometric pressure, the barometric pressure based on a pressure change at a sector of the fuel system when the sector is sealed with the vehicle travelling. The method may utilize a pressure change at the sealed sector of the fuel system, such as a sealed fuel tank, to identify barometric pressure, even with the engine off for extended durations of vehicle travel. As such, in a hybrid-vehicle application, including during hill descents in which the engine is maintained off, barometric pressure can still be updated.
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