Ina Walzlager Schaeffler Ohg

Schaeffler Technologies Ag & Co .kg

Ina Schaeffler Kg

Other

Ina-schaeffler Jg

Ina Walzlager

Ina Schaeffler Ohg

Schaeffler Kg

Jochen Auchter

Andreas Strauss

Rainer Ottersbach

Mike Kohrs

Jens Hoppe

Viktor Lichtenwald

Ulrich Wierl

Dirk Heintzen

Rudolf Eydam

Marco Schmitt

Jens Schafer

Michael Busse

Eduard Golovatai-Schmidt

Harald Elendt

Dieter Goppelt

Andreas Röhr

Jurgen Plate

Steffen Racklebe

Johannes Meyer

Torsten Keller

Michael Weiss

Thomas Motz

Hermann Wiehl

Joachim Matuschka

Ahmet Deneri

Lutz Witthöft

Andreas Hempfling

Jürgen Plate

Jochen Broz

Marcel Mannweiler

Steffen RÄCKLEBE

A device () for variably adjusting the control times of gas exchange vales () of an internal combustion engine () having a hydraulic phase adjustment device () and at least one volume accumulator (), wherein the phase adjustment device () can be brought into driving connection with a crankshaft () and a camshaft () and at least one early adjustment chamber () and at least one late adjustment chamber () which can be supplied with pressure medium via pressure medium lines (), or from which pressure medium can be drained. A phase position of the camshaft () can be adjusted relative to the crankshaft () in the direction of early control times by supplying pressure medium to the early adjustment chamber () while simultaneously draining pressure medium from the late adjustment chamber (), wherein a phase position of the camshaft () can be adjusted relative to the crankshaft () in the direction of late control times by supplying pressure medium to the late adjustment chamber () while simultaneously draining pressure medium from the early adjustment chamber (), wherein pressure medium can be supplied to the volume accumulator(s) () during operation of the internal combustion engine ().

Device for variably adjusting the control times of gas exchange valves of an internal combustion device

A camshaft adjusting device () including at least two hydraulic chamber (A, B) disposed between a stator () and a rotor () and separated by a vane () and supplied with pressure oil from a pressure oil source (P) by a hydraulic oil controller (). In order to achieve improved filling and emptying of the hydraulic chambers, the hydraulic oil controller according to the invention provides: first and second supply lines () disposed between the pressure oil source (P) and one of the hydraulic chambers (A), wherein check valves () are disposed in the supply lines (), wherein the supply lines () are free of further switchable valve elements, and wherein the supply lines () are the sole inlet line for hydraulic oil from the pressurized oil source (P) into the hydraulic chambers (A, B), and a 4/3-way valve element () that is effectively disposed between the hydraulic chambers (A, B) and a tank (T) has three valve positions (I, II, III).

Hydraulically actuated camshaft adjusting device

A method for determining a scanning ratio for a characteristic curve for the operation of an electromechanical valve for a camshaft adjuster in which an ambient temperature and a relative motion of a camshaft are determined at a reference point. In accordance with a specific ambient temperature and other operating conditions such as e.g., engine rpm, a holding scanning ratio is determined. Subsequently, at least one additional scanning ratio of an operating state is determined for a scanning ratio characteristic for the valve.

Method for determining a scanning ratio for a valve for a camshaft adjuster

A timing adjustment device with axially joined components, clamped by a camshaft central screw on a hub element which maintains the required peripheral position of these components relative to one another within a narrow tolerance range. On a disk element of the timing adjustment device an insert section is formed, which can be inserted into a recess formed in the hub element and, in the region of the insert section, at least one anchoring structure is formed, through which the insert section is anchored on a counter-structure, which is provided by the hub element.

Timing adjustment device for an internal combustion engine

A device for changing the control times of an internal combustion engine (camshaft adjuster) having a pressure medium distributor arranged within a camshaft is provided. The pressure medium distributor is provided at its front end with a radially extending shoulder, this shoulder forming part of the camshaft axial mounting.

Camshaft adjuster

An internal-combustion engine with a device for adjusting the rotational angle (camshaft adjuster ()) of a camshaft () relative to a crankshaft is provided. The device comprises a driving wheel () connected in a rotationally locked way to the crankshaft, a driven part () connected in a rotationally locked way to the camshaft (), and an adjusting mechanism, with which the phase position between the crankshaft and camshaft () can be set and maintained in a certain range of angles. A reduction of the required axial structural space of the camshaft adjuster () and the number of individual parts is achieved in that the driven part () is fixed to the camshaft () with a frictional, positive-fit, or interference-fit connection.

The invention relates to a device () for varying the control times of gas exchange valves of an internal combustion engine, with a hydraulic actuation device () and with a control valve (). The device () according to the invention is provided with mid-position locking of a hydraulic actuation device (). Furthermore, the device () according to the invention ensures that, in the event of the failure of an actuation unit () which regulates the control valve (), the hydraulic actuation device () is locked in the mid-position and the lock is maintained until the actuation unit () is repaired. Furthermore, the device () according to the invention makes it possible to start the internal combustion engine in a position locked in a mid-position, without a movable element () of the hydraulic actuation device () butting against a side wall of a pressure space () when the internal combustion engine is started. Methods are proposed to bring the actuation device () into a locked mid-position, and to hold it there, for the restarting of the internal combustion engine.

INA-schaeffler KG, industriestrasse 1-3, 91074 herzogenaurach ANR 12 88 48 20

A hydraulic device in an internal combustion engine for adjusting a rotation angle of a camshaft in relation to a crankshaft includes a tubular stator and a rotor connected in fixed rotative engagement with the camshaft and having plural vanes in spaced apart relationship to define pressure chambers on both sides of the vanes. The stator is connected in fixed rotative engagement with a crankshaft-drive timing pulley and constructed to define with the rotor vanes the pressure chambers. The stator is made by a shaping process without material to effect a mass reduction. Pressure medium is supplied to or purged from the pressure chambers to selectively adjust the position of the rotor in relation to the stator and thereby the position of the camshaft in relation to the crankshaft.

Internal combustion engine with hydraulic device for adjusting the rotation angle of a camshaft in relation to a crankshaft

A device for changing the control times of an internal combustion engine (camshaft adjuster ()) having a pressure medium distributor () arranged within a camshaft () is provided. The pressure medium distributor () is provided at its front end with a radially extending shoulder (), this shoulder () forming part of the camshaft axial mounting.

A hydraulic device for adjusting the rotation angle of a camshaft relative to a crankshaft in an internal combustion engine. The device has a rotor, with blades arranged around its periphery. A stator is connected in a rotationally secure manner to a drive wheel. The rotor and the stator together form pressure chambers, which can be filled with hydraulic fluid via a hydraulic fluid system, in which there is disposed a volume accumulator.

Internal combustion engine having a hydraulic device for adjusting the rotation angle of a camshaft relative to a crankshaft

A device () for the hydraulic adjustment of the angle of rotation of a camshaft () in relation to a crankshaft of an internal combustion engine, situated at the drive-side end () of the camshaft () and formed of a drive unit () that stands in a driven connection with the crankshaft and an output unit () that is connected in rotationally fixed fashion with the camshaft () is provided. The drive unit () stands in a force-transmitting connection with the output unit () via at least two pressure chambers () formed inside the device (), the supply of pressure medium to the pressure chambers () taking place via a separate distributor housing () that has a connecting flange () suitable for transmitting pressure medium to the device () and a control valve receptacle () that is connected to the connecting flange () via two pressure medium conduits (). The output unit () is fastened non-positively to the camshaft (), which passes through the device axially with its drive-side end () and has a hollow construction, the end segment () of the camshaft () being enclosed by the connecting flange () of the distributor housing () and having a plurality of radial bores () that stand in pressure medium connection with additional radial bores () in the camshaft () via a distributor insert () that can be placed into the hollow space () of the camshaft ().

Device for the hydraulic adjustment of the angle of rotation of a camshaft in relation to a crankshaft of an internal combustion engine

A hydraulic device in an internal combustion engine for adjusting a rotation angle of a camshaft in relation to a crankshaft includes a tubular stator and a rotor connected in fixed rotative engagement with the camshaft and having plural vanes in spaced apart relationship to define pressure chambers on both sides of the vanes. The stator is connected in fixed rotative engagement with a crankshaft-drive timing pulley and formed in single-piece construction with an end wall to thereby exhibit a pot-shaped structure. The pot is made without material removal from a sheet metal part and constructed to define with the rotor vanes the pressure chambers. Pressure medium is supplied to or purged from the pressure chambers to selectively adjust the position of the rotor in relation to the stator and thereby the position of the camshaft in relation to the crankshaft.

The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element () for the angular adjustment of the drive pinion relative to the shaft, two chambers () that are alternately supplied with hydraulic fluid and a control valve () for actuating the adjusting element (), said control valve being connected to the chambers () of the adjusting element () through pressure medium channels (). The control valve () comprises a valve body () that has two working connections A and B for the pressure medium channels (), a delivery connection P for the supply of hydraulic fluid and a discharge connection T for the discharge of hydraulic fluid, and the control valve () further comprises a sliding valve control piston () for setting different hydraulic resistances W between the individual connections. In an intermediate adjusted position of the valve control piston (), for setting an intermediate phase angle, a lower hydraulic resistance W prevails between the delivery connection P and that one of the working connections A and B at which a design-related, higher fluid leakage V occurs.

Camshaft control device and control valve with leakage compensation

The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element ( ) for the angular adjustment of the drive pinion relative to the shaft, two chambers ( ) that are alternately supplied with hydraulic fluid and a control valve ( ) for actuating the adjusting element ( ), said control valve being connected to the chambers ( ) of the adjusting element ( ) through pressure medium channels ( ). The control valve ( ) comprises a valve body ( ) that has two working connections A and B for the pressure medium channels ( ), a delivery connection P for the supply of hydraulic fluid and a discharge connection T for the discharge of hydraulic fluid, and the control valve ( ) further comprises a sliding valve control piston ( ) for setting different hydraulic resistances W between the individual connections. In an intermediate adjusted position of the valve control piston ( ), for setting an intermediate phase angle, a lower hydraulic resistance W prevails between the delivery connection P and that one of the working connections A and B at which a design-related, higher fluid leakage V occurs.

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Weisendorf, Germany

Jochen Auchter