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 when the device is opened and closeddetermining a pressure of the anode side of the fuel cell stack just before opening the device;
determining a pressure of the anode side of the fuel cell stack just after closing the device; and
determining the fuel flow using the difference between the pressure just after closing the device and the pressure just before opening the device.
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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.
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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 when the device is opened and closed determining a pressure of the anode side of the fuel cell stack just before opening the device; determining a pressure of the anode side of the fuel cell stack just after closing the device; and determining the fuel flow using the difference between the pressure just after closing the device and the pressure just before opening the device. - 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 opened and closed using a frequency and duty cycle of the injector; determining a pressure of the anode side of the fuel cell stack just before the injector is opened using a pressure sensor; determining a pressure of the anode side of the fuel cell stack just after the injector is closed using the pressure sensor; and determining the amount of fuel flow using the difference between the pressure just after the injector is closed and the pressure just before the injector is opened, 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 opened and closed; means for determining a pressure of the anode side of the fuel cell stack just before opening the injector; means for determining a pressure of the anode side of the fuel cell stack just after closing the injector; and means for determining the fuel flow using the difference between the pressure just after closing the injector and the pressure just before opening the injector. - View Dependent Claims (21, 22)
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Specification