| 摘要 |
<p>1,171,087. Hydropneumatic suspensions. DAIMLER-BENZ A.G. 11 April, 1968 [14 April, 1967], No. 17585/68. Heading B7D. An hydraulic flow regulator for a vehicle hydropneumatic suspension system is provided with connections 9, 10, 11 for a pump, oil chamber of a spring cylinder and a reservoir respectively, the connections being alternately interconnected by the regulator, an excess pressure valve 15 being disposed between the connections 9, 10 and a rotary slide valve 16 being disposed between the connections 9 and 11 and a valve 21, which is operated by a control edge 20 of the rotary valve 16, being disposed between the connections 10 and 11. In use, when a vehicle load is increased the valve 16 is rotated clockwise cutting off communication between the connections 9, 11 through passages 13, 12 and a recess 18 of the valve. The pump output pressure increases until it exceeds the pressure of the spring cylinder when the excess pressure valve 15 opens permitting the pressure fluid to flow to the spring cylinder until the normal vehicle height is attained when the rotary valve 16 is returned to the position shown by the spindle 22. To ensure a quick valve action the valve 16 is axially movable and there is a resilient connection between the valve 16 and the spindle 22 or in the linkage between the vehicle axle and the valve. Thus when the valve is rotated clockwise the raised pump output pressure acts on the right-hand face of the valve 16 (Fig. 2) providing frictional resistance to its rotation. When, as the valve is returned towards its normal position, the recess 18 begins to uncover the passages 12 and 13, the pump output passes to the reservoir, reducing its pressure and hence the frictional force on the valve 16. The resilient connection then opens the valve 16 completely. When the vehicle load is reduced the control edge 20 of the valve 16 opens the valve 21 to permit fluid to flow from the spring cylinder to the reservoir.</p> |
