| 摘要 |
<p>The device has control chambers (62, 64) of a cylinder (60) connected with usage outlets (U1, U2) of a hydraulic distributor (20) with low pressure or high pressure. Bearings (54, 56) of a slide (52) of an actuator e.g. fuel metering valve (50), are subjected to the high and low pressures on two sides of the bearing respectively. A dynamic seal (70) assures sealing between the bearings and the cylinder, where the seal produces dynamic friction between the bearing and the cylinder based on a difference between the pressures on the sides of the bearing.</p> |
