Land vehicles – Wheeled – Running gear
Patent
1992-05-14
1993-11-16
Focarino, Margaret A.
Land vehicles
Wheeled
Running gear
280 61, 280 612, B60G 17015
Patent
active
052616916
ABSTRACT:
A leveling system for motor vehicles, having two work actuators each assigned to one vehicle axle, between a respective wheel suspension in the vehicle body and having a proportional pressure control valve associated with each actuator. The pressure control valves have three switching positions for alternatingly connecting the pressure chambers of the associated actuators to a pressure fluid source and a pressure fluid tank, and for blocking off the pressure chambers. To prevent unstable driving conditions if the leveling system should fail, it is assured by structural provisions that in the pressure chamber blocking phase of the two actuators their two pressure chambers communicate with one another via a throttle. As a result, greatly different pressures in the two actuators at the moment they are blocked can be equalized, so that the unstable behavior of the vehicle is avoided. The throttle restriction is provided in pressure-tight seat valves which are incorporated between the proportional pressure control valves and the actuators.
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patent: 5176404 (1993-01-01), Sulzyc
Laichinger Martin
Scheffel Martin
English Peter
Focarino Margaret A.
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
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