CONTROL VALVE DEVICE FOR VEHICLE AIR SPRINGS

摘要

CONTROL VALVE DEVICE FOR VEHICLE AIR SPRINGS This invention relates to a mechanical or magneticactuated control valve device for so controlling pressure of fluid in an air spring for interposition between a sprung portion and an unsprung portion of a vehicle as to support the sprung portion at a substantially constant preselected height relative to the unsprung portion irrespective of the load carried by the sprung portion. A supply valve and a release valve are operated by either mechanical or electro-magnetic actuators by a cam to supply fluid under pressure to or release fluid under pressure from the air spring accordingly as the cam is rocked in one direction or in an opposite direction from a neutral position. Actuation or rocking movement of the cam in either direction from its neutral position, resulting from movement of the sprung portion relative to the unsprung portion in response to a change in the load on the vehicle, effects shifting of either the mechanical or the electro-magnetic actuators to cause operation of the proper valve to effect a change in the pressure in the air spring that is proportional to this degree of rocking and therefore the degree of change of load on the vehicle.