公开(公告)号：US20190309701A1

公开(公告)日：2019-10-10

申请号：US15947018

申请日：2018-04-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dale F. Klein ,  Andrew M. Shaw ,  Michael Gwidt

IPC: F02D41/38 ,  F02D41/04 ,  F02D19/06

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.

公开(公告)号：US10697390B2

公开(公告)日：2020-06-30

申请号：US15947018

申请日：2018-04-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dale F. Klein ,  Andrew M. Shaw ,  Michael Gwidt

IPC: F02D41/38

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.