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US 2019/0161112 A1Published application
Electric power steering device
AssigneeHonda Motor Co., Ltd.
InventorsSoichiro ITO, Norio YAMAZAKI, Toshihiro YODA
Life of this patent
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Abstract
Even in the case that the steered wheels are turned by an actual turning angle due to a disturbance from the road surface, and the steering shaft, which is mechanically connected to the steered wheels, attempts to rotate, a command current to an assist motor is set so that the actual turning angle becomes a corrected target turning angle. The force (torque) that attempts to cause rotation of the steering shaft due to the disturbance input from the road surface is instantaneously canceled by the assist motor.
Claims8
An electric power steering device, comprising:
- a steering mechanism including a steering operating element, and a steering shaft, a pinion shaft, and a rack shaft that mechanically connect the steering operating element and a steered wheel;
- a turning angle sensor adapted to detect an actual turning angle of the steered wheel;
- a torque sensor adapted to detect an actual steering torque generated in the steering shaft;
- an assist motor adapted to add an assist torque with respect to the steering mechanism;
- and
- a command current setting unit adapted to determine a target turning angle of the steered wheel based on the actual turning angle and the actual steering torque, and to set a command current to the assist motor in a manner so that the actual turning angle becomes the target turning angle.
3 more elements
Dependencies are inferred from the claim text.