Patent ID: 11912090
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. A damping control device for a vehicle having wheels including right and left front wheels and right and left rear wheels, the damping control device comprising:
a control force generating device configured to generate a vertical control force for damping a sprung portion of the vehicle between each of the wheels and a portion of a vehicle body that corresponds to a position of each of the wheels;
an information acquirer configured to acquire pieces of road surface displacement related information related to vertical displacements of a road surface at a predicted passing position where each of the wheels is predicted to pass at a timing when a predetermined period has elapsed from a current time, each piece of the road surface displacement related information including at least one of road surface displacements that are the vertical displacements of the road surface at the predicted passing position, a road surface displacement speed that is a time derivative of the road surface displacements at the predicted passing position, an unsprung displacement that is a vertical displacement of an unsprung portion of the vehicle at the predicted passing position, and an unsprung speed that is a time derivative of the unsprung displacement at the predicted passing position; and
a control unit configured to control the control force generating device to change the control force, wherein the control unit is configured to
calculate a first-situation control force adapted to a first situation in which a waveform of the road surface displacements on a right side of the vehicle and a waveform of the road surface displacements on a left side of the vehicle have opposite phases, based on the road surface displacement related information at the predicted passing position of the right front wheel, the road surface displacement related information at the predicted passing position of the left front wheel, the road surface displacement related information at the predicted passing position of the right rear wheel, and the road surface displacement related information at the predicted passing position of the left rear wheel,
calculate a first front wheel control force for the right and left front wheels adapted to the first situation and a first rear wheel control force for the right and left rear wheels adapted to the first situation by distributing the first-situation control force at a predetermined distribution ratio,
control, based on the first front wheel control force, the control force to be generated by the control force generating device in the right front wheel at the timing when the right front wheel passes through the predicted passing position of the right front wheel, and the control force to be generated by the control force generating device in the left front wheel at the timing when the left front wheel passes through the predicted passing position of the left front wheel, and
control, based on the first rear wheel control force, the control force to be generated by the control force generating device in the right rear wheel at the timing when the right rear wheel passes through the predicted passing position of the right rear wheel, and the control force to be generated by the control force generating device in the left rear wheel at the timing when the left rear wheel passes through the predicted passing position of the left rear wheel.