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Method and apparatus for engine monitoring

  • US 5,631,411 A
  • Filed: 12/04/1995
  • Issued: 05/20/1997
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Term
First Claim
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1. A method for testing an internal combustion engine, whereby measurements of a rotation angle velocity that is dependent on a crank angle are continuously implemented and dimensional quantities for speed and torque are identified on a basis of an evaluation thereof, wherein an average oscillation amplitude corresponding to the ignition frequency of a total energy level is used as a dimensional quantity for torque, the total energy level is calculated from a momentary rotational angle velocity and from a momentary moment of inertia which are dependent on the crank angle and take into account a kinetic energy of oscillating masses of said engine.

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