Vibration damping control apparatus for vehicle

  • US 5,537,967 A
  • Filed: 03/10/1995
  • Issued: 07/23/1996
  • Est. Priority Date: 12/28/1992
  • Status: Expired due to Term
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First Claim
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1. A vibration damping control system for a vehicle comprising:

  • a rotary electric machine connected to an internal combustion engine, said rotary electric machine generating an output to damp vehicle vibrations;

    crank angle detecting means for detecting a crank angle of said internal combustion engine;

    engine operating condition detecting means for detecting a preselected engine operating condition;

    a ROM device storing a phase difference based on a primary frequency component of vehicle vibration and said crank angle, said primary frequency component including a resultant vector defined by a rotational vibration component and a vertical vibration component, said ROM device also storing information relating said phase difference to said engine operating condition detected by said engine operating condition detecting means;

    operation mode determining means for determining an operation mode of said rotary electric machine based on said engine operating condition detected by said engine operating condition detecting means and said relationship between said phase difference and said engine operating condition stored in said ROM device to reduce both said rotational vibration component and said vertical vibration component; and

    controlling means for controlling said rotary electric machine based on said operation mode determined by said operation mode determining means.

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