| 摘要 |
A control apparatus for a hydrostatic auxiliary power steering arrangement, in particular for vehicles, has a metering motor (10) and two coaxial rotary slide valves (16, 17) forming between them a directional valve (14). The directional valve (14) is opened by rotating the inner rotary slide valve (17) by means of a steering element (57), so that fluid under pressure is allowed to pass through the metering motor (10) to a steering motor (8) and the metering motor (10) adjusts the outer rotary slide valve (16) in dependence on the amount of fluid flowing through the inner rotary slide valve (17). To avoid abrupt changes in the rotational speed of the inner rotary slide valve, and therefore to prevent acceleration forces that are too high being exerted on the steered item and possibly on the person controlling the steering, the inner rotary slide valve (17) is connected to a damping arrangement (70) counteracting its rotational movement.
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