Gasoline reid vapor pressure detection system and method for a vehicle propulsion system
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United States of America Patent
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Jun 30, 2020
Grant Date -
Oct 10, 2019
app pub date -
Apr 6, 2018
filing date -
Apr 6, 2018
priority date (Note) -
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Abstract
A vehicle propulsion system includes a first pump having an inlet for receiving fuel from a fuel reservoir and an outlet for providing pressurized fuel to a fuel feed line at a first pressure, a fuel feed line pressure sensor, a second pump having an inlet for receiving fuel from the fuel feed line and an outlet for providing pressurized fuel to an engine fuel rail at a second pressure, the second pressure being higher than the first pressure, a fuel temperature sensor, and a controller controlling the first pump to reduce the pressure of the fuel in the fuel feed line and determining whether the pressure of the fuel in the fuel feed line has reached a vaporization pressure of a component in the fuel.
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