Back to results
US 8,708,123 B2Granted
Hydraulic pump assembly
AssigneeBorgWarner TorqTransfer Systems AB
InventorsJohan Nilsson, Daniel Herven, Peter Dahlstrom, Lars Severinsson
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBorgWarner TorqTransfer Systems AB
InventorsJohan Nilsson, Daniel Herven, Peter Dahlstrom, Lars Severinsson
Estimating the term…
One embodiment may include a system for distributing torque between front and rear axles of an all wheel drive vehicle and/or between left and right wheels of a two or four wheel drive vehicle comprises at least one limited slip coupling having a disc package and a piston acting thereon, the piston being actuated by a hydraulic pump assembly. This assembly has an electric motor, a hydraulic pump driven thereby, and a centrifugal regulator also driven thereby, the centrifugal regulator controlling a pressure overflow valve, connected to the oil outlet of the hydraulic pump. The assembly specifically comprises an axial piston pump having a piston drum rotatable in a pump housing and containing a number of reciprocable axial pistons, at least one centrifugal lever pivotally attached to the piston drum, and a valve member connected to the centrifugal lever and being arranged for cooperation with the mouth of an oil outlet bore in the piston drum to form the pressure overflow valve.
A hydraulic pump assembly in a system for distributing torque between at least one of front and rear axles of an all wheel drive vehicle or between left and right wheels of a two or four wheel drive vehicle, the system comprising at least one limited slip coupling having a disc package and a piston acting thereon, the piston being actuated by the hydraulic pump assembly,
Dependencies are inferred from the claim text.