Valve module with active valve oiling
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMatthias Grenzhäuser, Christopher Schneider
Life of this patent
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Abstract
The valve module can be installed regardless of an oil level, for example of an oil level of an oil sump of a motor vehicle. By means of a buffer volume having an overflow it is always guaranteed that a leakage flow conveyed past a valve piston includes no air but consists solely of hydraulic medium, since the overflow guarantees a level of hydraulic medium which lies above an upper face of the valve piston in a preferred installation position. As a result, foaming of the hydraulic medium can be prevented. The valve module can also be installed above the oil sump, for example in an upper region of a gearbox of the motor vehicle. In addition, the oil from the overflow can be used for cooling/lubrication of further drive train components.
Claims20
A valve module configured for installation in a predetermined installation position within a hydraulic control system, the valve module comprising:
- a valve including a valve piston configured to be displaced in an actuating direction within a housing, the housing having a plurality of openings configured to be opened and closed via displacement of the valve piston, and
- a first opening of the plurality of openings is configured as a tank connection, and the valve is connected to a reservoir for a hydraulic medium via the tank connection, and
- the tank connection is fluidly connected to a buffer volume having an overflow arranged above an upper face of the valve piston when the valve module is installed in the predetermined installation position.
Dependencies are inferred from the claim text.