| 摘要 |
877,144. Maintaining vehicle height constant. DAIMLER-BENZ A.G. March 10, 1960 [March 11, 1959], No. 8501/60. Class 108(2). The height of a vehicle is automatically regulated by a control element for blocking the flow of freely circulated oil to cause it to be delivered past a non-return valve into hydro-pneumatic spring units on the axle to be adjusted. When the valve 11 is lifted by a decrease in vehicle height it interrupts the continuous circulation of oil by a pump 13 around a closed circuit 15, 16 to produce a rise in pressure causing a spring loaded non-return valve 30 to admit oil to the hydro-pneumatic springs 5 through conduits 10, 9. These conduits are placed in communication with the circuit 15, 16 by a groove 22 when the valve falls and the flow of oil from the springs is throttled by a pin 31 or by a choke in a port 19. The valve 8 controlling the front springs 3 is similar to the valve 11 but does not include a non-return valve 27 which prevents oil flowing from passage 18 into passage 19 when the springs 3 are being charged and the valve 11 is in the position for discharge. A stronger spring load is provided for the valve 29 controlling the springs.5 than for that controlling the springs 3 so that the latter can be charged while the valve 11 is in its normal position. The pump 13 may be driven continuously from the vehicle engine or be switched on when the vehicle door is opened. |
