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Method for enabling a substantially constant total fuel energy rate within a dual fuel engine

  • US 5,937,800 A
  • Filed: 03/06/1998
  • Issued: 08/17/1999
  • Est. Priority Date: 03/06/1998
  • Status: Expired due to Fees
First Claim
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1. A method for delivering liquid fuel and gaseous fuel to a dual fuel engine operating in a dual fuel mode, the method comprising the steps of:

  • (a) establishing a governor output value indicative of a total fuel energy rate desired to be delivered to the engine to maintain a desired engine speed;

    (b) determining a first value indicative of a liquid pilot fuel energy rate desired to be delivered to the engine and a second value indicative of a gaseous fuel energy rate desired to be delivered to the engine such that the sum of the desired liquid pilot fuel energy rate and the desired gaseous fuel energy rate is substantially equal to the desired total fuel energy rate of step (a); and

    (c) delivering gaseous fuel to the engine in an amount which provides the desired gaseous fuel energy rate and delivering liquid fuel to the engine in an amount which provides the desired liquid pilot fuel energy rate.

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