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Air restriction derate for internal combustion engines

  • US 5,205,261 A
  • Filed: 07/07/1992
  • Issued: 04/27/1993
  • Est. Priority Date: 07/07/1992
  • Status: Expired due to Fees
First Claim
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1. A method of operating an internal combustion engine having an inlet air filter and a plurality of solenoid operated fuel injection units adapted to receive fuel injection signals and responsively inject fuel into associated engine cylinders, wherein the engine is controlled by an electronic controller that produces the fuel injection signals as a function of sensed operating parameters and in accordance with a preselected horsepower curve, comprising the steps of:

  • sensing the level of clogging of the air filter and responsively producing a clogging level signal;

    comparing the clogging level signal to a preselected value and limiting the maximum engine horsepower in response to the clogging level signal being greater than or equal to the preselected threshold.

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