| 摘要 |
A railway truck leveling valve arrangement for improved railway car floor height control comprises a pneumatic level regulating valve (26), a rigid, lightweight bar (14), and a leveling valve linkage (12). The level regulating valve (26) is connected to and mounted above a secondary air spring suspension (30). The rigid, lightweight bar (14) extends between the axleboxes (16) of the railway truck wheelsets (19), the railway truck wheelsets (19) being coupled to a primary suspension (28). The level regulating valve linkage (12) connects the level regulating valve (26) and the rigid bar (14). The level regulating valve (26) senses spring deflection in both primary and secondary suspensions (28, 30) and signals the secondary air spring suspension (30) to compensate for both deflections. Consequently, the correction of the overall railway car floor height by the secondary suspension provides more precise car floor to station platform height control.
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