| 摘要 |
PURPOSE:To enable hydraulic pressure to be controlled with ease on the basis of a car speed and the like by inducting hydraulic oil discharged from an engine driven reaction control pump into a hydraulic pressure reaction mechanism through both a flow control valve and an electromagnetic control valve which corresponds to a car speed and the like. CONSTITUTION:Both a power steering pump 60 and a reaction control pump 96, both of which are driven by an engine, are coaxially installed, and the flow of pressurized oil proportional to an engine speed is discharged from each of their discharge ports 60a and 110. And the discharged oil from the reaction pump 96 is controlled so as to be of a constant flow QG by means of a flow control valve 90, and then is induced into a port 58 of a hydraulic pressure reaction mechanism. An electromagnetic control valve 120 is connected with a hydraulic line 131 to the port 58 where reaction hydraulic pressure is controlled by functioning a control valve 120 based on the value of electric current proportional to either a car speed or the angle of a steering handle. And a port 100, from which an excess flow of a flow control valve 97 is discharged, is connected to a suction port of the steering pump 60 through a hydraulic line 130. |
