| 摘要 |
1,042,094. Springs &c. FORD MOTOR CO. Ltd. March 15, 1965 [March 21, 1964], No. 10822/65. Heading F2S. A motor vehicle telescopic shock absorber, the damping force Pd is less in jounce than in rebound Pz when the relative velocity between the telescoping parts is below a critical velocity V 1 , but above this critical value the damping force is greater in jounce than in rebound. In a shock-absorber, Fig. 1 (not shown), at low piston speeds, during jounce, hydraulic fluid passes through openings 17 in the piston 2 to lift a control valve 18 against the action of a spring 19 so that fluid can pass from the lower 1b to the upper la cylinder compartment and through an opening 13 in the cylinder wall 1 to an annular chamber 20 which communicates, through a port 21 and a throttled passage 22, with an annular reservoir 5. Up to piston speeds of V 1 , Fig. 2, the damping force is relatively low, however, at this velocity, the increased speed causes a back pressure at the opening 13 so that the damping force rapidly increases as indicated at 33. At low piston speeds during rebound, a relatively strong spring 16 maintains a valve plate 15 in closing relationship with orifices 14 through the piston 2, the damping force, up to the velocity V 1 , due to passage of fluid through the opening 13 being greater than the corresponding damping force during jounce. At piston velocities greater than V 1 the valve plate 15 opens, and the rebound characteristic Pz flattens considerably at 31. A valve 11 controls flow of fluid from the reservoir 5 into the cylinder compartment 1b |
