INJECTOR FLOW MEASUREMENT FOR FUEL CELL APPLICATIONS
First Claim
1. A method for determining a fuel flow through a pulsed device that provides hydrogen fuel from a hydrogen source to an anode side of a fuel cell stack, said method comprising:
- determining device events of when the device is open;
determining the pressure of the anode side of the fuel cell stack just before a device event;
determining the pressure of the anode side of the fuel cell stack just after the device event; and
determining the fuel flow using the difference between the pressure just after the device event and the pressure just before the device event.
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Accused Products
Abstract
A method for determining the amount of fuel flow from a high pressure gas tank to the anode side of a fuel cell stack through pulsed injector. The anode sub-system pressure is measured just before the injector pulse and just after injector pulse and a difference between the pressures is determined. The difference between the pressures, the volume of the anode sub-system, the ideal gas constant, the anode sub-system temperature, the fuel consumed from the reaction in the fuel cell stack during the injection event and the fuel cross-over through membranes in the fuel cells of the fuel cell stack are used to determine the amount of hydrogen gas injected by the injector.
30 Citations
22 Claims
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1. A method for determining a fuel flow through a pulsed device that provides hydrogen fuel from a hydrogen source to an anode side of a fuel cell stack, said method comprising:
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determining device events of when the device is open; determining the pressure of the anode side of the fuel cell stack just before a device event; determining the pressure of the anode side of the fuel cell stack just after the device event; and determining the fuel flow using the difference between the pressure just after the device event and the pressure just before the device event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for determining a fuel flow through a pulsed injector that injects hydrogen fuel from a hydrogen source to an anode side of a fuel cell stack, said method comprising:
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determining injector events of when the injector is open using a frequency and duty cycle of the injector; determining the pressure of the anode side of the fuel cell stack just before an injector event using a pressure sensor; determining the pressure of the anode side of the fuel cell stack just after the injector event using the pressure sensor; and determining the amount of fuel flow using the difference between the pressure just after the injector event and the pressure just before the injector event, a volume of an anode sub-system, a temperature of the anode sub-system and an ideal gas constant. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system for determining a fuel flow through an injector that provides hydrogen fuel from a hydrogen source to an anode side of a fuel cell stack, said system comprising:
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means for determining injector events of when the injector is open; means for determining the pressure of the anode side of the fuel cell stack just before an injector event; means for determining the pressure of the anode side of the fuel cell stack just after the injector event; and means for determining the fuel flow using the difference between the pressure just after the injector event and the pressure just before the injector event. - View Dependent Claims (21, 22)
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Specification