| 摘要 |
877,265. Road-vehicle spring-suspensions; regulating vehicle height. RECHERCHES ETUDES PRODUCTION. Feb. 5, 1959 [Feb. 5, 1958; March 25, 1958], No. 4167/59. Class 108(2). A levelling valve assembly 1 is rigid with one half axle 2a has an actuating lever 5 coupled to the other half axle 2b. The lever 5 is connected to the chassis frame 15 through a pair of springs 7, 8. In Fig. 1 the assembly 1 comprises respective admission and exhaust valves 11, 12 the movement of which is damped by a dashpot piston 16. In Fig. 2 the piston 16 is locked against movement on the occurrence of centrifugal force. The latter operates in one direction or the other upon masses 19, 20, to project respective lugs 23, 24, into engagement with corresponding recesses in the rod 16a of the piston 16. In Fig. 3, a valve 26 is disposed in series with the valve 12 so that when the driver and passengers alight from the vehicle, air will not escape from the spring. A spring 27 which opposes opening of the valve, is selected to allow the valve 26 to lift at a pressure which corresponds to the weight of the driver only in the vehicle, or the driver and one passenger. |
