| 摘要 |
An improved power steering control apparatus includes a power steering motor having a piston rod which extends through one end of the motor cylinder. This results in the rod end of the piston having a smaller working area than the head end of the piston. In order to equalize the fluid pressure forces on opposite sides of the piston when the motor is in an inactive condition, a power steering control valve vents both sides of the piston to atmospheric pressure when the control valve is in a neutral or unactuated condition. Three conduits are connected with the control valve; a supply conduit which conducts fluid from a pump to the control valve to effect operation of the motor upon actuation of the control valve; a return conduit through which fluid is returned to a reservoir when the control valve is in the neutral condition; and a vent conduit which connects the control valve and opposite sides of the motor cylinder piston directly with the reservoir and atmospheric pressure when the control valve is in the neutral condition. |
