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Fuel reid vapor pressure estimation

  • US 5,884,610 A
  • Filed: 10/10/1997
  • Issued: 03/23/1999
  • Est. Priority Date: 10/10/1997
  • Status: Expired due to Fees
First Claim
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1. A method for estimating automotive internal combustion engine fuel volatility in an internal combustion engine selectively receiving fuel vapors trapped in a fuel vapor recovery system, comprising the steps of:

  • admitting fuel vapors from the fuel vapor recovery system to the engine for combustion therein;

    determining a change in engine fueling resulting from the admission of fuel vapors from the fuel vapor control system to the engine; and

    estimating fuel volatility as a function of the determined change.

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