Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Zf Friedrichshafen Ag

Zf Batavia L.l.c.

Zf Transmission Technologies, L.l.c.

Manfred Fischer

Andreas Salm

Michael Herrmann

Stephan Brussa

Rudolf Kauffeldt

Lothar Beigang

Dietmar Illerhaus

Thomas Lindner

Dieter Blaser

A support for a pump drive wheel () on the clutch side of a pump with an off-axis pump arrangement in an automatic transmission, particularly in a dual clutch transmission, in which the pump drive wheel () is supported on the centering plate () of the pump ().

Support of a pump drive wheel on the side of the starting component with an off-axis pump arrangement in an automatic transmission

A variator for ratio adjustment of a continuously variable chain drive transmission having one variator shaft () and one variator pulley () supported upon the variator shaft () and axially movable by pressurizing a variator pressure chamber (). The variator shaft () has on one end an axial hole () through which the variator pressure chamber () and a second pressure chamber () can be loaded with pressure independent of each other. The pressure is supplied to the variator pressure chamber () via a first section () of the axial hole () and the pressure is supplied to the second pressure chamber () via a non-rotating pipe () and a second section () of the axial hole (), the pipe () is situated within the first hole section (). It is proposed that the pipe () has two axially adjacently disposed sealing rings () for reciprocal dynamic sealing of the pressure supplies to the variator pressure chamber () and to the second pressure chamber () and that the variator shaft () has a vent hole () discharging, on one side between the two sealing rings () and on the other side in a transmission inner space ().

Variator

The invention is based on a radial piston pump ( ) with a pump body ( ), in which pump body ( ) are placed pistons ( ), and cylinders ( ) arrayed radial to a cam ( ) and the pistons ( ) upon an inward thrust suck in fluid by means of suction side intakes ( ) and upon an outward thrust, the pistons ( ) impel fluid through pressure openings ( ) in the outer end walls ( ) of the cylinder ( ) into a plenum ( ) whereby the check valves ( ) are formed from an annular coil spring valve ( ) which cover the pressure ports ( ) and the thereto connected stress relieving corrugations ( ), and upon the exceeding of a specified threshold transport pressure, the respective pressure opening ( ) opens to the plenum ( ). The proposal is made, that a stress relieving zone ( ) of a piston-cylinder unit ( ) be connected to the pressure zone ( ) of a neighboring piston-cylinder unit ( ). Thereby pressure peaks in neighboring piston-cylinder units ( ) would be ameliorated and by a thrust of reduced magnitude of the coil spring valve ( ) of a relatively great circumferential area, the intensity of noise would be diminished.

Radial piston pump

Growing community of inventors

Kressbronn, Germany

Manfred Fischer