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US 2010/0193310 A1Published application
Yaw damper with pump
AssigneeKoni B.V.
InventorPaul De Kock
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AssigneeKoni B.V.
InventorPaul De Kock
Estimating the term…
Yaw damper for damping yaw motions between two vehicle parts. This includes in the customary manner a piston part and a cylinder part, wherein that piston part is provided with a piston which divides that cylinder part into two chambers. Between these two chambers, connecting lines are present. The embodiment of these connecting lines determines the damping characteristic which governs the motion between the piston and the cylinder part. Especially for vehicle parts which move at higher speeds and/or high frequencies, such as train sets, it is desirable to provide a damper which is as stiff as possible. For this purpose, the present invention proposes the installation of pumping elements which, as far as possible, increase the pressure in the chambers which are formed by the piston in the cylinder part. Preferably, this construction is realized such that this pressure automatically decreases at lower speeds and/or low frequencies.
Yaw damper for damping yaw motions between two vehicle parts, comprising a cylinder part provided with a fastening to a vehicle part, and a piston part displaceable in this cylinder and provided with a fastening to another vehicle part, wherein said piston part comprises a piston which divides said cylinder part into two chambers, wherein between said chambers connecting lines are arranged, with one-way valves accommodated therein, said connecting lines with one-way valves determine the piston/cylinder damping characteristic, wherein a fluid reservoir is present, connectable to one of said chambers, wherein in the yaw damper pumping means are provided, driven by the displacement of said piston part with respect to that cylinder part, the inlet of said pumping means being connected to said reservoir and the outlet being connected via non-return valves to each of said chambers, and said pumping means being constantly effective irrespective of the position of the piston part with respect to the cylinder part.
Dependencies are inferred from the claim text.