Valve arrangement and pump for a gear system
AssigneeLuk Fahrzeug-Hydraulik GmbH & Co. KG
InventorsIvo Agner, Andreas Hampel, Martin Schindler, Axel Fassbender, Bernd Denfeld
Life of this patent
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Abstract
The invention relates to a valve arrangement with a pressure limiting valve and a flow regulator valve, which comprises a flow regulator piston, having at least one first hydraulic resistor, distinguished in that the flow regulator valve's (5) flow regulator piston (15) has a split pressure return surface and in that the first part (ring surface (45)) of the pressure return surface is capable of working at a pressure p1 and a second part (annulus surface (31)) of the pressure return surface is capable of working at a pressure p2.
Claims8
A pump system for a gear system in a vehicle comprising:
- a pump, a transmission control unit, a consumer and a valve located in a gear system casing wherein:
- the valve is operable to at least one of limit pressure, regulate flow and modulate pressure of a fluid medium in the gear system;
- the pump is a one-stroke pump and is at least one of a vane pump and a roller type pump, and has a stroke ring for influencing the movement of the at least one of vanes and rollers and has a suction channel for receiving the fluid medium;
- and
- the stroke ring has at least one hollow adjacent to the suction channel and extending across a section of the suction channel.
Dependencies are inferred from the claim text.