| 摘要 |
854,233. Adjusting body height. GENERAL MOTORS CORPORATION. March 11, 1959 [March 27, 1958], No. 8383/59. Class 108(2). A vehicle suspension system which provides a constant clearance height has a manually operated valve 42, which overrides the automatic control of the clearance height of the suspension system. Compressed air from a reservoir 24 is admitted to or exhausted from air springs 8, 10 by levelling valves 38, 40. To. increase the clearance height of the vehicle, the manual valve 42 is operated to admit air from the reservoir 24 to two conduits 70, 72, via a conduit 68. When this occurs excess pressure in the conduits 70, 72 move freely-slidable pistons 80, 82 within Tee-junctions 56, 58 to the left and right respectively. Thus, the levelling valvesare rendered inoperative. Air is supplied to the air springs 8, 10 until the desired clearance height is obtained. When the valve 48 is moved back to the position shown in Fig. 2. air escapes from the springs via an outlet orifice 78 until the normal clearance height is attained, at which point pistons 80, 82 move to their original positions. The manually operated valve 42 may be adjusted so that both the inlet and exhaust ports are blocked. Thus, the increased clearance height of the vehicle may be retained for any desired period.
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