Patent ID: 7766136
Filing Date: 2010-08-03
Classification: F16F

Abstract:
1. A hydro-pneumatic suspension arrangement for load-bearing and resilient wheel support in a motor vehicle, comprising at least one first spring cylinder assembly with a first piston which is guided in a first cylinder such that the first piston can be moved within the first cylinder, the first piston having on one side thereof, a first piston rod guided to extend out of the first cylinder such that the first piston separates, within the first cylinder, a first cylindrical working chamber from a first annular chamber which encloses the first piston rod, in order to generate a load-bearing spring force (F), the first piston acts counter to a working pressure (pA) of an elastically compressible first volume of a pneumatic spring medium (FM), the first piston rod being telescopically variable in length through a second spring cylinder assembly being subjected at least to a counterpressure of an elastically compressible second volume of a pneumatic opposing spring medium (GM), wherein the second spring cylinder assembly has a second piston which is guided in a second cylinder such that the second piston can be moved relative to the second cylinder and a second piston rod, which is formed on one side of the second piston, is guided to extend out of the second cylinder, and wherein the working pressure (pA), the counterpressure, and surfaces of the first and second pistons subject respectively to the working pressure (pA) and the counterpressure are cooperatively configured such that use properties, including a static level position of the hydro-pneumatic suspension arrangement including both the first and second spring cylinder assemblies, remain substantially constant at different temperatures, wherein the second piston separates, within the second cylinder, a cylindrical second working chamber from a second annular chamber, and the second annular chamber is subjected to the action of the second volume of the pneumatic opposing spring medium (GM).