Patent ID: 11919353
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 12:
13. A damping control device for a vehicle, comprising:
an actuator configured to generate a vertical control force for damping a sprung portion of the vehicle between at least one wheel and a portion of a vehicle body that corresponds to a position of the wheel;
an electronic control unit configured to control the actuator; and
a road surface displacement related information acquiring device configured to acquire road surface displacement related information related to a vertical displacement of a road surface ahead of the wheel, wherein:
the electronic control unit is configured to:
determine a predicted wheel passing position where the wheel is predicted to pass,
calculate a target control force for reducing vibration of the sprung portion when the wheel passes through the predicted wheel passing position as a value proportional to a road surface displacement related value that is based on the road surface displacement related information, and
control the actuator such that the control force generated by the actuator becomes the target control force when the wheel passes through the predicted wheel passing position;

the electronic control unit is configured to calculate the target control force by using the road surface displacement related value having a phase that has been advanced to advance a phase of a transfer function from the road surface displacement related value based on the road surface displacement related information to the target control force by a phase advance amount larger than 0 degrees;
the electronic control unit is configured to acquire the road surface displacement related values at the predicted wheel passing position and in a frequency determination range ahead of the predicted wheel passing position based on the road surface displacement related information;
the electronic control unit is configured to classify the road surface displacement related values in the frequency determination range into a plurality of frequency bands; and
the electronic control unit is configured to determine the phase advance amount based on magnitudes of the road surface displacement related values in the frequency bands.