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Cylinder pressure based optimization control for compression ignition engines

  • US 6,354,268 B1
  • Filed: 03/01/1999
  • Issued: 03/12/2002
  • Est. Priority Date: 12/16/1997
  • Status: Expired due to Term
First Claim
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1. A gas-filled compression ignition internal combustion engine comprising:

  • (A) a plurality of cylinders each having an intake port and exhaust port;

    (B) a fuel supply system which selectively supplies a gaseous fuel to said cylinders, wherein said fuel is one which ignites by compression;

    (C) an air supply system which supplies air to said intake ports of said cylinders during engine operation;

    (D) a sensor which directly senses pressure within one of said cylinders; and

    (E) electronic control means for controlling operation of at least one of said air supply system and said fuel supply system to (1) determine, based upon signals received from said sensor, an actual cylinder pressure-dependent parameter of said engine prevailing at the time of said measurement, (2) determine an optimum value of said parameter for optimizing a selected engine performance characteristic at a prevailing engine operating condition, and (3) automatically adjust at least one engine operating characteristic so as to cause said actual value of said parameter to approach said optimum value of said parameter.

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