Vibration damping control apparatus for vehicle

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:
• vibration detecting means for detecting a primary frequency component of vehicle vibration including a resultant vector defined by a rotational vibration component and a vertical vibration component;
• a ROM device storing a plurality of operation modes of said rotary electric machine;
• and
• operation mode determining means for determining an operation mode from said operation modes stored in said ROM device based on said primary frequency component detected by said vibration detecting means;
• and
• controlling means for controlling said rotary electric machine based on said selected operation mode.

A vibration damping control system for a vehicle comprising:

• vibration producing means, operating with a given operation timing, for generating a vibration of a preselected frequency;
• phase difference determining means for determining a phase difference based on an engine revolution and a frequency of vehicle vibrations including a first vibration component caused by movement of a rotational member of an engine and a second vibration component caused by movement of a rectilinear member of the engine;
• and
• controlling means for controlling the operation timing of said vibration producing means to produce the vibration in a phase defined in a preselected relation to the phase difference determined by said phase difference determining means to compensate the vehicle vibrations.

A vibration damping control system for a vehicle comprising:

• a generator-motor connected an engine of the vehicle for applying a torque to said engine to minimize a vehicle vibration, said generator-motor working in a power generation mode and a motor mode, said generator-motor transforming engine torque into electrical energy in said power generation mode, said generator-motor providing additional torque to said engine in said motor mode;
• engine revolution detecting means for detecting an engine revolution;
• phase difference determining means for determining a phase difference between the engine revolution detected by said engine revolution detecting means and a frequency of the vehicle vibration, including a rotational vibration component and a linear vibration component, said vehicle vibration being produced at said engine revolution;
• operation timing determining means for determining an operation timing with which said generator-motor is switched between the power generation mode and the motor mode to apply a torque variation to said engine, said operation timing being based on the phase difference determined by said phase difference determining means;
• and
• controlling means for controlling said generator-motor based on the operation timing determined by said operation timing determining means.