Schaeffler Technologies Ag & Co .Kg

Marco Meisborn

Jens Hoppe

Ali Bayrakdar

Dieter Adler

Mario Kuhl

Jurgen Osterlanger

Calin Petru Itoafa

Jürgen Osterlänger

Thomas Motz

Sascha Reuschel

Thierry Leobold

Jurgen Schulz

Christian Hagen

Robert Seeger

Murat Yakan

Peter Kares

Robert Kamm

Luc Fischer

Steffen Alvermann

Horst Steinbinder

Tobias Adam

Kay Marschalkowski

Jürgen Schulz

Henrik Meinel

Thomas Krämer

Wolfgang Döppling

The disclosure relates to a hydraulic unit of an electrohydraulic gas exchange valve control system of an internal combustion engine. The hydraulic unit includes a hydraulic housing having a receiving opening, a piston guide, and a slave piston. The piston guide is fastened in the hydraulic housing by way of self-staking with a wall of the receiving opening. The piston guide includes an outer part that brings about the self-staking and an inner part that guides the slave piston. An inner surface of the outer part is radially interspaced from the outer surface of the inner part in an axial region of the self-staking and the outer part and the inner part are connected in an axially form-locked manner so that a first end section of the outer part facing the gas exchange valve is partially or fully formed into an outer circumferential recess of the inner part.

Hydraulic unit of an electrohydraulic gas exchange valve control system

A pendulum tensioner, comprising a first and second tensioning arm, and a bearing sleeve configured to attach to a generator housing, wherein the bearing sleeve forms a sliding channel together with a locking sleeve, in which one of the tensioning arms is rotatably positioned with axial play.

Pendulum tensioner having adjustable axial play and belt drive

A pressure accumulator for a camshaft phaser of an internal combustion engine, including a housing that accommodates a piston and forms a cavity fillable with a hydraulic fluid. The cavity is configured as a hole and is closed by a cover on at least one side so as to be fluid-tight, whereby the cover is fastened to the housing by a flanged connection. A method for the production of a pressure accumulator for a camshaft phaser, including a pressure accumulator that forms a cavity, whereby a piston is placed into the cavity, and subsequently, a cover is put in place over the cavity&#x2014;sealing it off towards the outside&#x2014;in such a way that a material portion of the housing or of the cover creates such a positive connection between the cover and the housing that the cover is affixed in its position relative to the housing.

Housing bell with integrated pressure accumulator having a flanged cover

Planetary roller gear drive with a spindle nut () that is arranged on a threaded spindle () and is divided into nut parts () that can be adjusted relative to each other in the axial direction, and with a plurality of planets () that are arranged distributed around a periphery and are in roller engagement with the spindle nut () and the threaded spindle (). An adjustment part () set in the axial direction against the one nut part () that can be adjusted in the axial direction is provided and the one nut part () that can be adjusted in the axial direction is arranged between this adjustment part and the other nut part ().

Planetary roller gear drive

A method of manufacturing a lift transmitting component (), particularly for a gas exchange valve train or a fuel pump drive of an internal combustion engine (), is provided, The lift transmitting component includes a housing (), a bearing pin () fixed in a reception bore () of the housing () and a roller () mounted through a sliding or a rolling bearing on the bearing pin (). The bearing pin is core-hardened over an entire axial length to a core hardness of at least 650 HV, and pin ends () of the core-hardened bearing pin are radially widened relative to the reception bore for enabling a connection of the bearing pin to the housing () through positive engagement. The hardness of the bearing pin is at the most 780 HV, the radial widening of one of the pin ends being realized with a shaping die () which travels axially parallel to the bearing pin () and applies a force to the pin end in a transition region between a periphery and a front end surface of the bearing pin.

Method of manufacturing a lift transmitting component

An electromagnetic hydraulic valve () is provided having a valve housing () with a pressurized hydraulic medium inlet channel (), a pressurized hydraulic medium outlet channel (), a magnet coil (), and a valve seat (), with a magnet armature () that can be excited by the magnet coil and a valve tappet () fixed on this armature. A valve-closing element () is activated by the valve tappet and that blocks the connection between the pressurized hydraulic medium channels for contact on the valve seat. The magnet armature with the valve tappet and the valve-closing element are guided so that they can move longitudinally in the valve housing and the valve tappet and the valve-closing element contact each other with facing longitudinal end sides () in a way that is free from tensile forces. Here, one annular, continuous lobe or several lobes () separated from each other are formed on the longitudinal end side of the valve tappet, which span a contact plane running perpendicular to a longitudinal direction of movement for the longitudinal end side of the valve-closing element.

Electromagnetic hydraulic valve

A lift transmitting component (), particularly for a gas exchange valve train or a fuel pump drive of an internal combustion engine, and a method of manufacturing such a lift transmitting component comprising a housing () and a bearing pin () fixed in a reception bore () of the housing () as also a roller () rotatable about the bearing pin () and optionally mounted on a rolling bearing, said bearing pin () being connected to the housing () by positive engagement through radially widened front ends (), the bearing pin () is core-hardened over its entire length with a core hardness of at least 58 HRC and its front ends () are widened by radial spot riveting.

Lift transmitting component and method of manufacturing such a component

A connection of a bearing bolt () in a cylindrical housing () of a roller tappet () that is actuated in a direction of a longitudinal axis (Z) is provided, especially for a tappet push-rod valve drive of an internal combustion engine. The bearing bolt () is supported in bore holes () of the housing (), which extend in a transverse plane (XY) to the roller tappet (), perpendicular to the longitudinal axis (Z), and is connected with a positive and/or non-positive fit to the housing () through material deformation. The material deformation is provided as one or more segments (), of which at least one segment () completely encloses a radial load zone () of the bearing bolt (), and a section () of the bearing bolt () extending about the transverse plane (XY) is free from material deformation.

Fastening of a bearing bolt to a roller tappet

Growing community of inventors

Hochstadt a.d. Aisch, Germany

Marco Meisborn