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Method and system for determining the type of fuel used to power a vehicle

  • US 6,745,613 B2
  • Filed: 08/13/2001
  • Issued: 06/08/2004
  • Est. Priority Date: 08/13/2001
  • Status: Expired due to Fees
First Claim
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1. A method of determining the type of fuel used by a vehicle, comprising:

  • receiving first data collected by an emissions sensor, wherein the first data corresponds to a plurality of measured hydrocarbon concentrations in a vehicle exhaust stream;

    receiving second data collected by the emissions sensor, wherein the second data corresponds to measured nitrogen-oxygen compound concentrations in the vehicle exhaust stream;

    identifying at least one hydrocarbon threshold level corresponding to a first fuel type;

    comparing the first data to at least one of the hydrocarbon threshold levels; and

    determining whether the measured hydrocarbon concentrations correspond to at least one of the hydrocarbon threshold levels;

    identifying at least one nitrogen-oxygen compound threshold level corresponding to the first fuel type;

    comparing the second data to at least one of the nitrogen-oxygen compound threshold levels; and

    determining whether the measured nitrogen-oxygen compound concentrations correspond to at least one of the nitrogen-oxygen compound threshold levels.

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