Systems and methods for fuel system pressure sensor rationalization
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United States of America Patent
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Oct 19, 2021
Grant Date -
Apr 2, 2020
app pub date -
Oct 1, 2018
filing date -
Oct 1, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and systems are provided for determining a source of degradation stemming from a vehicle fuel system during a refueling event. Specifically, in one example a method may include responsive to a refueling lock that enables access to a fuel tank of a fuel system being manually unlocked in order to add fuel to the fuel tank, monitoring a pressure in the fuel system and a fuel level in the fuel tank during refueling the fuel tank, and indicating degradation of the fuel system as a function of both the pressure and the fuel level. In this way, fuel system degradation may be pinpointed during a refueling event that is enabled via manual unlocking of the refueling lock.
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