| 摘要 |
PURPOSE: A hybrid power steering system is provided to reduce operational noise and improve durability by distributing a steering auxiliary force based on the speed and weight increase of a vehicle and reducing loads applied to a steering auxiliary device at one side. CONSTITUTION: A hybrid power steering system comprises a first steering auxiliary device, a second steering auxiliary device, a torque sensor (301), a speed sensor (303), and electronic control unit (307). The first steering auxiliary device forwardly or backwardly rotates a steering column using the operation force of a first motor (311) and assists a steering force. The second steering auxiliary device forwardly or backwardly rotates the sector shaft of a gear box (325) using the fluid pressure of a hydraulic fluid in an oil pump (323) operated by a second motor (321) and assists the steering force. The torque sensor senses the torque of the steering column. The speed sensor senses the speed of a vehicle. The electronic control unit separately transmits a target current value control signal to the first and second motors using the signal inputted from the torque sensor and the speed sensor. [Reference numerals] (101) Steering wheel; (301) Torque sensor; (303) Speed sensor; (305) Weight mode switch; (307) Electronic control unit; (311) First motor; (313) Reducer; (321) Second motor; (323) Oil pump; (325) Gear box; (327) Control valve |
