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Distinguishing the fuel admitted to a fuel system

  • US 8,214,129 B2
  • Filed: 05/13/2009
  • Issued: 07/03/2012
  • Est. Priority Date: 05/13/2009
  • Status: Active Grant
First Claim
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1. A method for registering a content change in a fuel system of a motor vehicle, the method comprising:

  • admitting fuel to the fuel system, the fuel system configured to receive hydrogen and compressed natural gas into a common space;

    indicating that compressed natural gas has been admitted if a temperature in the common space increases by more than a threshold amount when the fuel is admitted, said indicating occurring, if at all, before the compressed natural gas is consumed by an engine of the motor vehicle;

    indicating that hydrogen has been admitted if the temperature in the common space increases by less than the threshold amount when the fuel is admitted, said indicating occurring, if at all before the hydrogen is consumed by the engine of the motor vehicle; and

    adjusting a start-up operating parameter of the motor vehicle in response to which of said fuels is indicated to have been admitted.

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