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System and method for metering the fuel supply to a combustion installation operating on more than one type of fuel

  • US 5,628,294 A
  • Filed: 04/12/1996
  • Issued: 05/13/1997
  • Est. Priority Date: 09/21/1993
  • Status: Expired due to Term
First Claim
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1. System for the metered supply of at least a first and a second type of fuel, in particular petrol and LPG (Liquid Petroleum Gas), to a combustion installation, such as an internal combustion engine (1), comprising a first electronic control unit (8) for metering, via fuel supply means (4, 6), the supply of the first and second fuel, and detection means (10) for the detection of process and operating parameter values of the combustion installation, and a second electronic control unit (12), coupled to the first control unit (8) and the fuel supply means (4, 6), for metering the supply of the second fuel under the control of the first control unit (8), characterized in that said first electronic control unit (8) has adaptive control characteristics and said second electronic control unit (12) is provided with recording means (20) for, during operation on the first fuel, recording, in dependence of respective detected process and operating parameter values, first control signal values emitted by the first control unit (8) and with control and comparison means (19) for, during operation on the second fuel, comparing, in dependence o the process and operating parameters concerned, the momentarily emitted first control signal values with the first control signal values recorded by the recording means (20), in order so to adjust second control signal values emitted by the second control unit (12) that the momentarily emitted first control signal values are kept within a predetermined range with respect to the recorded first control signal values.

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