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Determining crankshaft acceleration in an internal combustion engine

  • US 5,095,742 A
  • Filed: 02/04/1991
  • Issued: 03/17/1992
  • Est. Priority Date: 08/24/1990
  • Status: Expired due to Term
First Claim
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1. A method for determining gross engine acceleration during a time interval including a plurality of cylinder firings and substantially centered on a selected cylinder firing, during operation of a combustion engine having N cylinders, where N is greater than 2, said engine providing firings during respective power strokes of said cylinders, said method comprising the steps of:

  • measuring crankshaft acceleration corresponding to each of a plurality of consecutive cylinder firings during operation of said engine;

    selecting a cylinder firing corresponding to an instant for which gross engine acceleration is to be determined;

    determining median acceleration over a series of said cylinder firings substantially centered on said selected cylinder firing, whereby said gross engine acceleration is determined in accordance with said median acceleration.

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