| 摘要 |
PURPOSE:To enable smooth steering while obtaining an always appropriate reaction force, by dividing reaction force chambers on both the sides of a control valve to provide a pair of auxiliary reaction force chambers and by controlling the quantity of supplied pressure oil to the auxiliary reaction force chambers depending on the quantity of the steering. CONSTITUTION:A power steering gear 10 comprises an oil pump 11, a flow control valve 12, a control valve 13 and a power cylinder 14. A pair of reaction force chambers 38, 39 are provided on both the sides of the control valve 13. The reaction force chambers 38, 39 are divided so that a pair of auxiliary reaction force chambers 42, 43 are provided. An orifice 44 is provided between the port 16 of the flow control valve 12 and the pressure port 20 of the control valve 13. A passage upstream to the orifice 44 is connected to the auxiliary reaction force chambers 42, 43 through auxiliary reaction force control passages 45-47. An auxiliary reaction force control valve 48 is installed among the passages 45-47 and regulated by an actuator 55 depending on the output of a steering quantity sensor 68. |
