Fuel tank system
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United States of America Patent
Stats
-
Feb 17, 2015
Grant Date -
Jan 10, 2013
app pub date -
Mar 31, 2011
filing date -
Mar 31, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a fuel tank system wherein the liquid levels of fuel in two fuel storage portions can be equally maintained, and the fuel amount in each fuel tank can be estimated with a high degree of accuracy. The fuel tank system is provided with a fuel tank in which a main tank portion and a subsidiary tank portion are formed; a siphon tube which extends from the main tank portion to the subsidiary tank portion, to transfer fuel from one tank portion to the other tank portion; and an electronic control unit (ECU) for determining whether or not the fuel is transferred via the siphon tube (in the transfer state). The ECU determines that the fuel is in the transfer state when the change rate of a sender signal is equal to or less than a predetermined threshold value (VF_th).
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Cited Art Landscape
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