Schaeffler Technologies Ag & Co .kg

Ina Schaeffler Kg

Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Aft Atlas Fahrzeugtechnik Gmbh

Martin Rauch

Michael Haas

Dieter Schmidt

Bodo Rörig

Bernd Hartmann

Christian Hauck

Henning Karbstein

Benjamin Wolf

Jens Artmann

Wolfgang Reik

Eduard Golovatai-Schmidt

Dirk Neubauer

Roland Arneth

Detlef Axmacher

Stefan Mack

Thomas Kremer

Nicola Morelli

Markus Proschko

Lars Pfuetzenreuter

Dirk Kenter

A tensioning device () for a starter generator belt drive of an internal combustion engine and a starter generator () with such a tensioning device. The tensioning device is to be supported on the machine housing (') of the starter generator by a slide bearing.

Tensioning device for a belt drive and electric machine with such a tensioning device

A tensioning device () is provided for a starter generator drive belt of an internal combustion engine and a starter generator () equipped with such a tensioning device. It includes a tensioning housing () with two belt pulleys () and a bearing support () fastened at the machine housing () of the starter generator, on which the tensioning housing is pivotally supported via a friction bearing.

Tensioning device for a belt drive and electric engine with such a tensioning device

A hydraulic unit () for a cylinder head () of an internal combustion engine with a hydraulic, variable valve train () is provided. In the hydraulic unit, a high-pressure chamber (), a medium-pressure chamber (), and also a low-pressure chamber () used as a hydraulic medium reservoir are formed. The low-pressure chamber communicates merely via a choke opening () with the medium-pressure chamber, wherein the choke opening passes through a separating wall () extending between the low-pressure chamber and the medium-pressure chamber.

Hydraulic unit for a cylinder head of an internal combustion engine with hydraulic, variable valve train

A device for hydraulic control of gas exchange valves of a reciprocating internal combustion engine which has slave cylinders in operative connection with one or more gas exchange valves and master actuators in operative connection with at least one cam provided with a basic and cam profile of a camshaft that is rotatably driven by the engine and can be hydraulically connected to the slave cylinders. The device also has a control device controlled by an actuating member, the device controlling the volume of hydraulic liquid fed to the slave cylinders, and at least one feed line, via which low pressure liquid from a pressure source can be fed to the device by means of at least one non-return valve. The actuators have displaceable vanes, a component carrying the vanes, and cells limited by walls. The vanes are in operative connection with the basic and cam profile of the cam.

Device for the hydraulic control of gas exchange valves of a reciprocating internal combustion engine

Valve controller for reciprocating piston internal combustion engines with at least two intake and/or exhaust gas-exchange valves for each piston/cylinder unit, wherein the gas-exchange valves are guided by valve stems in a cylinder head () of the reciprocating piston internal combustion engine, loaded in a closing direction by valve springs, and can be controlled via a common bridge () by an activation device, wherein the bridge () is guided over a sliding surface parallel to the movement of the gas-exchange valves, the bridge () has at least one hydraulic valve clearance compensation element (or) that connects to a gas-exchange valve, and a device is provided that prevents rotation of the bridge () about the sliding surface.

Valve control for reciprocating piston internal combustion engine

A hydraulically actuated, preferably variable, valve drive of an internal-combustion engine is provided, with a slave unit (), which is embodied as a separate component relative to a master unit. A special characteristic is that the slave unit is provided with a hydraulic backlash compensation element (), which is connected to a path () for feeding hydraulic medium only outside of a stroke phase of a slave piston (). As a result, on one hand an easy-to-produce valve drive with slave unit () is provided. On the other hand, unnecessary 'pumping up' of the backlash compensation element () during the stroke phases of the slave piston () is prevented by the previously mentioned admission of hydraulic medium.

Hydraulically actuated, variable valve drive of an internal combustion engine

The invention proposes a finger lever () of a valve train of an internal combustion engine, said finger lever () being switchable to different valve lifts for at least one gas exchange valve and comprising an outer lever () having two arms () between which an inner lever () is arranged for pivoting relative to the outer lever (), which outer and inner levers () can be coupled to each other by a coupling means (), the outer lever () comprising on one closed end (), a support () for a gas exchange valve and the finger lever () comprising on an opposite end (), a complementary surface () for a support element, the inner lever () having a fulcrum () in a region of the opposite end (), and at least this inner lever () comprising a contact surface () for a cam. In the finger lever () of the invention, the outer lever () has a substantially open fork-like configuration, the contact surface () for the cam on the inner lever () is configured as a rotatable roller () and the coupling means () comprises at least one slide () that extends crosswise to a longitudinal direction of the finger lever (), an axial line of the at least one slide () coincides with an axial line of the roller (), and the fulcrum () of the inner lever () is situated at least approximately at a same point on a length of the finger lever () as a fulcrum of the outer lever () in a region of the complementary surface () of the finger lever (). The switchable finger lever () of the invention has only a small design space requirement and a coupling mechanism of a relatively simple structure.

Finger lever of a valve train of an internal combustion engine

A finger lever () of a valve train of an internal combustion engine, said finger lever () being switchable to different valve lifts for at least one gas exchange valve and comprising an outer lever () having two arms () between which an inner lever () is arranged for pivoting relative to the outer lever (), which outer and inner levers () can be coupled to each other by a coupling means (), the outer lever () comprising on one closed end (), a support () for a gas exchange valve and the finger lever () comprising on an opposite end (), a complementary surface () for a support element, the inner lever () having a fulcrum () in a region of the opposite end (), and at least this inner lever () comprising a contact surface () for a cam whereby in the finger lever (), the outer lever () has a substantially open fork-like configuration, the contact surface () for the cam on the inner lever () is configured as a rotatable roller () and the coupling means () comprises at least one slide () that extends crosswise to a longitudinal direction of the finger lever (), an axial line of the at least one slide () coincides with an axial line of the roller (), and the fulcrum () of the inner lever () is situated at least approximately at a same point on a length of the finger lever () as a fulcrum of the outer lever () in a region of the complementary surface () of the finger lever () so that the switchable finger lever () has only a small design space requirement and a coupling mechanism of a relatively simple structure.

What is proposed is a switchable tappet ( ) for the direct transmission of a cam lift to a tappet push rod. The tappet ( ) comprises a hydraulic clearance compensation element ( ) and has an excellent hydraulic rigidity compared to the prior art. This is achieved by a leak gap positioned radially very far outwards. This leak gap is situated directly between a housing ( ) and a pressure piston ( ) which, in its turn, encloses an inner element ( ) that acts on a tappet push rod.

Switchable tappet for the direct transmission of a cam lift to a tappet push rod

The invention proposes a switchable tappet ( ) for the direct transmission of a cam lift to a tappet push rod. A coiled compression spring ( ), used as a lost motion spring, for loading the inner element ( ) is shifted axially out of a housing ( ). For this purpose, the inner element ( ) comprises an extension ( ) that projects out of the housing ( ) and is surrounded by the coiled compression spring ( ). This measure contributes to minimizing the total mass of the switchable tappet ( ) because the overall length of the housing ( ) is shortened.

Growing community of inventors

Bamberg, Germany

Martin Rauch