Patent ID: 7048280
Filing Date: 2006-05-23
Classification: B60G

Abstract:
1. A hydropneumatic axle suspension having an adjustable axle-spring rate for a vehicle having varying axle loads, comprising: a first hydropneumatic accumulator; a hydraulic suspension cylinder having a cylinder chamber and an annular space; a first pressure-regulated suspension circuit connecting the cylinder chamber to the first hydropneumatic accumulator; a first regulating valve for regulating the first pressure-regulated suspension circuit; a level-control device for regulating a pressure in the first suspension circuit; a second hydropneumatic accumulator; a second pressure-regulated suspension circuit connecting the annular space to the second hydropneumatic accumulator; a second regulating valve for regulating the second pressure-regulated suspension circuit; and an electromagnetic actuator configured to automatically change the axle spring rate according to a predefined control mode.