Electric power steering apparatus
AssigneeJtekt Corporation
InventorsHiroshi Suzuki, Terutaka Tamaizumi
Life of this patent
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Abstract
A steering wheel return compensation component is calculated based on an integrated value obtained by integrating a basic control amount in such a manner that the basic control amount has a property to rotate a steering wheel with a specific steering angle by a greater amount to its neutral position as the absolute value of the steering angle becomes greater. Alternatively, a steering wheel return compensation component is calculated in such a manner that the steering wheel return compensation component has a property to rotate the steering wheel by a greater amount to the neutral position as the absolute value of an integrated value obtained by integrating the steering angle becomes greater.
Claims23
An electric power steering apparatus of a vehicle, the apparatus comprising:
- a steering force assisting section that applies an assisting force to a steering system of the vehicle to assist manipulation of a steering wheel, the steering force assisting section including a motor as a driving source;
- and
- a control section that calculates a target value of the assisting force applied to the steering system, the control section calculating the target value by superimposing on a basic assist component a steering wheel return compensation component in accordance with which the steering wheel is returned to a neutral position, the control section controlling operation of the steering force assisting section by supplying a driving power to the motor in such a manner that the assisting force matching the target value is applied to the steering system,
- wherein the steering wheel return compensation component is calculated by the control section based on an integrated value obtained by integrating a basic control amount computed by the control section in such a manner that the basic control amount has a property to rotate the steering wheel with a specific steering angle by a greater amount to the neutral position as the absolute value of the steering angle becomes greater.
An electric power steering apparatus of a vehicle, the apparatus comprising:
- a steering force assisting section that applies an assisting force to a steering system of the vehicle to assist manipulation of a steering wheel, the steering force assisting section including a motor as a driving source;
- and
- a control section that calculates a target value of the assisting force applied to the steering system, the control section calculating the target value by superimposing on a basic assist component a steering wheel return compensation component in accordance with which the steering wheel is returned to a neutral position, the control section controlling operation of the steering force assisting section by supplying a driving power to the motor in such a manner that the assisting force matching the target value is applied to the steering system,
- wherein the steering wheel return compensation component is calculated by the control section in such a manner that the steering wheel return compensation component has a property to rotate the steering wheel with a specific steering angle by a greater amount to the neutral position as the absolute value of an integrated value obtained by integrating the steering angle becomes greater.
Dependencies are inferred from the claim text.