| 摘要 |
PURPOSE:To effectively distribute pressure oil from a drive pump so as to improve maneuverability of a vehicle by providing a variable means for variably controlling distribution ratio of a flow of the pressure oil which is allowed to flow in an actuator in front and rear wheel sides. CONSTITUTION:After reading a steering speed signal theta from a steering angle sensor 37, oil is supplied to actuators 24, 26 being based on a distribution condition of flow amount. After determining distribution ratio of the flow amount of pressure oils Qf, Qr, a signal is output to a flow divider valve 30. Now when the steering speed signal theta is in a small value, an opening of a variable orifice 30a in a variable valve of the flow divider valve 30 is decreased simultaneously with an opening of a variable orifice 30b increased, and the pressure oil Qf of small flow amount is supplied to the front wheel side actuator 24 from a drive pump 27 simultaneously with the pressure oil Qr of large flow amount supplied to the rear wheel side actuator 26. Consequently, a large flow amount of the pressure oil Qr is supplied to the rear wheel side actuator 26, and stability at the time of turning is improved by sufficiently maintaining steering force and holding force of a rear wheel 25. |
