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Conversion system with electronic controller for utilization of gaseous fuels in spark ignition engines

  • US 6,145,494 A
  • Filed: 08/28/1997
  • Issued: 11/14/2000
  • Est. Priority Date: 08/25/1997
  • Status: Expired due to Fees
First Claim
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1. An electronic controller for a gasoline powered Otto-cycle internal combustion engine having an original equipment engine control unit, which enables said engine to operate interchangeably between liquid and gaseous fuels, said controller comprising:

  • means for generating on the basis of sensed conditions and independently of an original sparking ignition module an ignition timing sequence and dwell time adapted for the gaseous fuel used;

    means for generating on the basis of sensed conditions and independently of the original fuel injection control module a modulated fuel injection signal for at least one gaseous fuel injector, said signal being adapted to the gaseous fuel used;

    means for generating signals to said original equipment engine control unit indicating normal gasoline operating conditions while operating using a gaseous fuel;

    means for initiating a gasoline fuel operating mode and terminating a gaseous fuel mode in response to at least one signal indicating operating conditions; and

    means for initiating gaseous fuel operation and terminating gasoline fuel operation in response to at least one signal indicating operating conditions.

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