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Expired Canadian patentCanada

Control system for engine operation using two fuels of different volatility

CA 1270161 C · Owner: Wineland, Richard J. · Inventors: Nichols, Roberta J.; Clinton, Eric L.; Wineland, Richard J.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method for controlling the amount of fuel mixture, including a first and second fuel of different volatility, to be supplied to an internal combustion engine includes calculating a base amount of fuel mixture needed to achieve a desired air to fuel ratio at a predetermined engine operating condition. Such a base amount of fuel mixture is modified as a function of the temperature of the internal combustion engine and is a function of the percentage of the first fuel.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 2, 1986
GrantedJune 12, 1990
Term endedJune 12, 2007
Patent numberCA 1270161 C
Classification (IPC)F02D41/04 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedDec 2, 1986Patent grantedJune 12, 1990Term endedJune 12, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.