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Vehicle powertrain torsional processing system

  • US 7,171,292 B2
  • Filed: 03/23/2004
  • Issued: 01/30/2007
  • Est. Priority Date: 03/23/2004
  • Status: Active Grant
First Claim
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1. A system for processing vehicle powertrain torsional information, the system comprising:

  • a vehicle powertrain having a plurality of powertrain components including an internal combustion engine and a number of downstream components driven by the engine;

    a speed sensor producing a speed signal indicative of rotational speed of one of the powertrain components; and

    a control computer determining a magnitude of an Nth-order torsional component of vehicle powertrain vibration as a function of the speed signal, the control computer executing either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from conditions at which the magnitude of the Nth-order torsional component exceeds a threshold magnitude if the magnitude of the Nth-order torsional component exceeds the threshold magnitude for at least a first predefined duration.

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