Preview damping control apparatus for vehicle and preview damping control method for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroki Furuta
Life of this patent
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Abstract
The preview damping control includes an ECU. When the vehicle is traveling within a communications disruption area in which a radio communication device is hard to communicate with a cloud, the ECU uses road surface displacement correlating information that has been stored in an on-board memory device in advance for the communications disruption area so as to perform a preview damping control.
Claims9
A preview damping control apparatus for a vehicle comprising:
- a communication device configured to be able to communicate with outside of the vehicle;
- a control force generating device configured to generate a control force to a part corresponding to at least one of wheels of the vehicle to damp a vibration of a sprung mass of the vehicle;
- a control unit configured to perform a preview damping control to damp the vibration of the sprung mass by letting the control force generating device generate, at a time point at which the wheel actually reaches a predicted passing through position which the wheel is predicted to reach and which is ahead of the wheel, the control force that corresponds to a force determined based on road surface displacement correlating information that correlates with a vertical displacement of a road surface at the predicted passing through position;
- and
- an on-board memory device configured to store the road surface displacement correlating information,
- wherein
- the control unit is configured to:
- obtain, through communication of the communication device, the road surface displacement correlating information from an external storage device that is located outside of the vehicle and has stored the road surface displacement correlating information, and perform the preview damping control using the obtained road surface displacement correlating information, when the vehicle is traveling within a communicably area in which the vehicle can communicate with the external storage device;
- and
- perform the preview damping control using the road surface displacement correlating information that has been stored in the on-board memory device in advance for a communications disruption area in which the vehicle is hard to communicate with the external storage device, when the vehicle is traveling within the communications disruption area.
A preview damping control method for a vehicle having a control force generating device configured to generate a control force to a part corresponding to at least one of wheels of the vehicle to damp a vibration of a sprung mass of the vehicle, comprising a preview damping control step of performing a preview damping control to let the control force generating device generate a control force that corresponds to a force determined based on road surface displacement correlating information that correlates with a vertical displacement of a road surface at a predicted passing through position which the wheel is predicted to reach and which is ahead of the wheel, so as to damp the vibration of the sprung mass caused when the wheel actually reaches the predicted passing through position,
- wherein, the vehicle comprises:
- a communication device configured to be able to communicate with outside of the vehicle;
- and
- an on-board memory device configured to store the road surface displacement correlating information,
- and wherein, the preview damping control step includes a first step and a second step:
- the first step including:
- a step of obtaining, through communication of the communication device, the road surface displacement correlating information from an external storage device that is located outside of the vehicle and has been storing the road surface displacement correlating information, when the vehicle is traveling within a communicably area in which the vehicle can communicate with the external storage device;
- and
- a step of using the obtained road surface displacement correlating information to perform the preview damping control, when the vehicle is traveling within the communicably area;
- and
- the second step including:
- a step of using, when the vehicle is traveling within the communications disruption area in which the vehicle is hard to communicate with the external storage device, the road surface displacement correlating information for the communications disruption area that has been stored in the on-board memory device while the vehicle is traveling within the communicably area, so as to perform the preview damping control.
Dependencies are inferred from the claim text.