Control arrangement for a pneumatically cushioned vehicle

Details Control arrangement for a pneumatically cushioned vehicle Control arrangement for a pneumatically cushioned vehicle

1982-09-13

1984-06-12

Butler, Douglas C.

Land vehicles

Wheeled

Running gear

267 6411, 280714, B60G 1704

Patent

active

044537360

ABSTRACT:
This invention relates to a control system for a pneumatically cushioned vehicle having at least a first and a second pneumatically cushioned axle. The pressure in the air spring bellows of the second axle is controlled in accordance with the air spring bellows of the first axle. The air spring bellows of the second axle are connected to a source of supply pressure by a pneumatic relay valve. The relay valve includes a control inlet which is connected with the air spring bellows of the first axle. The relay valve is designed in such a way, that if no pressure or a relatively low control pressure is present at the control inlet, the pressure at an outlet port of the relay valve leading to the air spring bellows of the second axle will be maintained at a minimum value. The relay valve includes a first control chamber and a second control chamber which are separated by a relay piston. The piston of the relay valve is biased by a compression spring which establishes a predetermined level of the pressure initially entering the air spring bellows of the second axle in the event of subsequent pressure loss.

REFERENCES:
patent: 2950147 (1960-08-01), Neubeck
patent: 3063734 (1962-11-01), Davies et al.
patent: 3071394 (1963-01-01), Miller
patent: 3145032 (1964-08-01), Turek
patent: 4077676 (1978-03-01), Hata
patent: 4231554 (1980-11-01), Ekonen et al.

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