Air Suspensipn for Dutch Leylands
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AN air-suspension system which has been developed by Leyland Motors, Ltd„ for test by the Netherlands Railways is to be exhibited by Leyland-Holland N.V. at the Amsterdam Show, which opens next Friday, It is purely experimental, and is not being fitted to the 600 buses already being supplied to the Netherlands Railways under current contracts.
The system works in conjunction with leaf springs, which support approximately 90 per cent, of the unladen sprung weight. The excess load is carried by the air springs. The leaf springs provide longitudinal and lateral location in addition to torque reaction.
The suspension is to be shown as applied to a rear axle. Four Dunlop Pneuride double-convolution bellows are incorporated, there being bellows behind and ahead of the axle beam on each side. The bellows are carried at the ends of inverted. U-members, the .loop of the U being above" the axle beam, with the leaf springs above them. The ends of the leaf springs are conventionally mounted on the chassis frame, with single shackles at the rear ends.
Two levelling valves are mounted on the inside of the frame side members, and telescopic dampers are provided.