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Method and system to determine engine restart

  • US 7,047,944 B2
  • Filed: 10/17/2003
  • Issued: 05/23/2006
  • Est. Priority Date: 10/17/2003
  • Status: Expired due to Fees
First Claim
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1. A method for controlling an amount of fuel delivered to an engine upon start in a vehicle, said method including the steps of:

  • measuring a conductance of an air/fuel sensor heater;

    sensing an engine operating parameter using a sensing means;

    using the measured conductance of the air/fuel sensor heater and sensed engine operating parameter to determine a length of time the engine was shut off, by a controller operatively in communication with the air/fuel sensor heater and the engine parameter sensing means;

    using the length of time the engine was shut off in determining a corrected amount of fuel to be delivered to the engine by a fuel injection system; and

    delivering the corrected amount of fuel to the engine when the engine starts up.

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