Device for controlling the pressure to be supplied to a hydrostatic steering unit
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Jun 5, 1996
filing date -
Dec 16, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
In a device for controlling the pressure to be supplied to a hydrostatic steering unit (1) by means of a control signal (s), there is a rotary slide valve arrangement, one slide valve element of which is rotatable by means of a steering means (5) and the other side valve element of which is corrected by means of a measuring motor (16). Together with a series throttle (AV), a control throttle (AS) forms a series circuit independent of the intake path of the steering motor (4), which circuit is connected between a pressure source (CF) and the tank (6). The control throttle (AS) has a closing characteristic that extends substantially across the entire working range of the angle of rotation of the slide valve elements. The control signal (s) is tapped between the series throttle (AV) and the control throttle (AS). This provides a pressure control that is independent of load.
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