专利名称：POWER STEERING DEVICE发明人：SHIMIZU, Yoshinobu申请号：EP98938965.5申请日：19980824公开号：EP0953493A1公开日：19991103
专利附图：
摘要：A power steering device in which a steering supplementary power is producedby the hydraulic pressure generated by a pump driven by an electric motor. The deviceinclude a steering torque sensing mechanism (13) for measuring the steering torque, asteering urgency calculation unit (S5) which calculates the urgency of the steering by
utilizing the derivative of the second order of the steering torque with respect to timedetected by the steering torque sensing mechanism, a target rotational speed settingunit (31, S6 and S7) which determines an assist start rotational speed which is an initialtarget rotational speed at which the electric motor (M) is rotated initially and a controlunit (31) which controls the drive of the electric motor so as to drive the electric motor atthe target rotational speed preset by the target rotational speed setting unit.
申请人：KOYO SEIKO CO., LTD.
地址：5-8, Minamisemba 3-chome, Chuo-ku Osaka 542-0081 JP
国籍：JP
代理机构：Steil, Christian, Dipl.-Ing.
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