Suspension system for vehicle
AssigneesToyota Jidosha Kabushiki Kaisha, Kayaba Industry Co., Ltd.
InventorsHirofumi Inoue, Hideshi Watanabe, Takuhiro Kondo
Life of this patent
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Abstract
A suspension system is provided to execute a control for avoiding a state in which an operation of an electric motor which is a power source of an electromagnetic actuator is kept halted at a certain operational position while the motor is generating a motor force. Where a target rotational position of the motor becomes equal to a specific operational position (e.g., a rotational position at which an electrifying current amount of one phase reaches a peak value), a control for shifting the target rotational position by δθ is executed. Where the rotational position of the motor is kept located at the certain position for a time period longer than a prescribed time, a control for changing the rotational position of the motor is executed.
Claims17
A suspension system for a vehicle, comprising:
- an electromagnetic actuator which includes an electric motor and which generates, based on a motor force generated by the electric motor, an actuator force that is a force in a direction in which a body of the vehicle and a wheel are vertically moved toward and away from each other;
- and
- a control device which controls an operation of the electromagnetic actuator by controlling the electric motor,
- wherein the control device is configured to execute an operation-halting-state avoiding control for avoiding a state in which an operation of the electric motor is kept halted at a certain operational position while the motor is generating the motor force, and
- wherein the control device is configured to execute, as the operation-halting-state avoiding control, an operational-position changing control in which an operational position of the electric motor is periodically changed at a frequency lower than a sprung resonance frequency.
Dependencies are inferred from the claim text.