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Method of detecting low compression pressure responsive to crankshaft acceleration measurement and apparatus therefor

  • US 5,915,272 A
  • Filed: 08/02/1993
  • Issued: 06/22/1999
  • Est. Priority Date: 08/02/1993
  • Status: Expired due to Fees
First Claim
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1. A method of compression pressure determination in a combustion chamber of a cylinder in a running engine, said method comprising the steps of:

  • measuring acceleration of a crankshaft of said running engine, said measurement centered proximate a maximum rate of compression of said cylinder, and providing a first acceleration variable responsive thereto; and

    providing a compression pressure variable having a magnitude indicative of a compression pressure in the combustion chamber of the cylinder in said running engine determined dependent on an amplitude of the measured first acceleration variable.

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