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US 2009/0294207 A1Published application
Motor-Driven Power Steering System
AssigneeHyundai Motor Company
InventorsKisung PARK, Sooboo Park
Life of this patent
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Abstract
According to the present invention, unlike to motor-driven power steering systems in the related art, it is possible to generate an appropriate assistant steering force that is required to drive the motor according to steering of the driver, without expensive components, such as a torque sensor and an electronic controller, such that it is possible to achieve a motor-driven power steering system having a simple structure at a low cost.
Claims17
A motor-driven power steering system, comprising:
- an input shaft that is connected to a steering handle;
- an output shaft that is connected to a steering wheel;
- a motor that is configured to provide an assistant steering force to the output shaft;
- a torsion bar that couples the input shaft with the output shaft to make a torsional displacement in steering;
- a switch plate disposed to the input shaft and a resistor plate disposed to the output shaft respectively, to change selectively resistance to and polarity of electricity that is conducted to the motor according the torsional displacement of the torsion bar;
- an input member that continuously supplies the electricity to the switch plate, the input member coupled to a first stationary member;
- and
- an output member that continuously outputs the electricity that has passed through the resistor plate, to the motor, the output member coupled to a second stationary member.
5 more elements
Dependencies are inferred from the claim text.