Schaeffler Technologies Ag & Co .kg

Ina Walzlager Schaeffler Ohg

Ina Schaeffler Kg

Ina&mdash;schaeffler Kg

Ina Walzlager Ohg

Joachim Dietz

Andreas Strauss

Ali Bayrakdar

Gerhard Scheidig

Jens Sch&auml;fer

Jens Schafer

Martin Steigerwald

Michael Busse

Rainer Ottersbach

Olaf Boese

Jochen Thielen

Matthias Kapp

Hermann Golbach

Boris Putz

Rudiger Herzog

Manfred Wilhelm

A camshaft adjuster including a stator, a rotor and a pressure medium supply, at least one chamber being formed on the stator, which is divided into two working chambers by at least one vane formed on the rotor or rotatably fixedly connected to the rotor is provided. A pressure medium is applicable to each of the two working chambers via the pressure medium supply in such a way that a pressure of the pressure medium may be increased in each of the working chambers to the extent that the pressure increase results in a rotation of the rotor. A switchable valve is formed in the vane of the rotor, which, in a first switching position of the valve, allows a flow of the pressure medium from a first working chamber through the vane into a second working chamber, in a second switching position the valve hydraulically separating the working chambers from each other. A locking element, which fixes the vane in a defined position with respect to the chamber, is designed to control an inflow or outflow of the pressure medium into or out of a working chamber. The pressure medium supply includes an oil pump, a supply line connecting the oil pump to at least one of the working chambers and a hydraulic accumulator, which differs from the oil pump and the supply line.

Camshaft adjuster

A camshaft adjusting device for an internal combustion engine including: a vane-type adjuster actuable by a pressure medium and which is rotationally fixed to a camshaft by a rotor and rotationally fixed to a crankshaft by a stator; a central valve has a displaceable valve body, by which a pressure medium is fed to the vane-type adjuster via a pump from a reservoir, the medium being selectively introduced into different working chambers and fed back from other working chambers to the reservoir, depending on the position of the valve body. The device includes a rolling bearing, by which the end section of the camshaft facing the vane-type adjuster is mounted in relation to a fixed housing wall. An axially oriented through-flow opening extends through the rolling bearing through which the pressure medium delivered by the pressure flows in an axial direction to the central valve.

Camshaft adjusting device

A camshaft adjusting system () having a camshaft adjuster () and a camshaft (), wherein the camshaft adjuster () has a drive element () and an output element () which is disposed so as to be pivotably movable with respect to the drive element (), wherein the output element () is non-rotatably connected to the camshaft (), wherein a cover element () is fastened non-rotatably to the output element () and the hub () of the cover element () is disposed between the output element () and the camshaft (), wherein the radial direction of extension of the cover element () is greater than the diameter of the contact surface () of the hub () of the cover element () to the camshaft ().

Camshaft adjusting system

A camshaft unit includes a camshaft having a radial channel, a hydraulic phase setting device communicating with the radial channel for adjusting the phase length of the camshaft with respect to a crankshaft via hydraulic pressure medium and a pressure medium channel embodied as a solid cylinder head component. To transfer a pressure medium, at least one pressure medium transfer element is formed between the pressure medium channel and the radial channel. The pressure medium transfer element includes a ring channel including a ring channel opening extending in the peripheral direction of the ring channel and including a radial channel opening leading into a radial channel and opposite the ring channel opening. The pressure medium channel communicates with the radial channel via the ring channel opening and the radial channel opening.

Radial camshaft pressure medium transfer

A camshaft adjuster for adjusting the phase position of a camshaft relative to a crankshaft, in particular a hydraulic camshaft adjuster. A camshaft bearing area provided in the camshaft adjuster is designed as a roller bearing.

An internal combustion engine () having a device () for changing the relative angular position of a camshaft () with respect to a crankshaft of the internal combustion engine, wherein the device () includes a drive element () driven by the crankshaft and a housing element (). The drive element () together with the housing element () rotates about an axis (a) during operation of the internal combustion engine and the device () is at least partially surrounded by a casing () of the internal combustion engine (). In order to improve the oil exchange in the housing bell of the internal combustion engine, and to prevent deposition of particles in the housing bell, the housing element () is provided with at least one fluid-conveying element (), wherein the fluid-conveying element () is intended and suitable for conveying fluid.

Internal combustion engine having a device for changing the relative angular position of a camshaft with respect to a crankshaft

An apparatus for variable setting of control times of gas exchange valves of an internal combustion engine which has an outer and inner rotor rotatable relative to the former, with one component drive-connected to a crankshaft and the other drive-connected to a camshaft. The apparatus has at least one pressure space, which are each divided into two pressure chambers acting counter to one another. The apparatus has a plurality of pressure medium channels, via which pressure medium is fed to or led away from the pressure chambers. Additionally, the apparatus has a plurality of rotational-angle limitation devices assuming an unlocked and locked state. The locking states are set by the supply of pressure medium to or discharge of pressure medium from the respective rotational-angle limitation apparatus. Furthermore, a method for controlling an apparatus for variable setting of control times of gas exchange valves of an internal combustion engine is disclosed.

Apparatus for the variable setting of the control times of gas exchange valves of an internal combustion engine

A device for setting the relative rotational position of a camshaft () of an internal combustion engine () relative to a crankshaft () driving the camshaft (), having a traction mechanism drive () wrapping around the crankshaft () and the camshaft (), which includes a loaded traction-mechanism section () and a non-loaded traction-mechanism section (), and a tensioning device () for changing the length of the loaded traction-mechanism section (). The tensioning device () is supported on the internal combustion engine () and has an adjustment device () that can be fixed.

Device for setting the relative rotational position of a camshaft of an internal combustion engine relative to a crankshaft driving the camshaft

An internal combustion engine having a device for hydraulically adjusting the angle of rotation of the camshaft thereof relative to the crankshaft thereof is provided, which also includes a vacuum pump for a servo load. The device includes a drive unit that is connected in a driving manner to the crankshaft and an output unit which is connected in a torsion-proof manner to the camshaft. The lubricating oil of the internal combustion engine, which is fed from a radial bearing of the camshaft in the cylinder head, is used as a hydraulic pressurizing medium for the device. Thee vacuum pump includes a housing that has a flanged connection to the cylinder head cover, and a rotor that is disposed therein and is provided with a drive shaft via which the vacuum pump is driven and lubricated. The vacuum pump is arranged in an axial direction relative to the device, while the device is provided with additional coupling elements via which the drive shaft od the vacuum pump is connected in a driving manner to the device. The vacuum pump is lubricated by lubricating oil from the internal combustion engine, which is delivered to the device as the pressurizing medium.

Internal-combustion engine with a device for hydraulically adjusting the angle of rotation of the camshaft relative to the crankshaft and a vacuum pump for a servo load, especially a brake booster

The invention relates to an internal-combustion engine with a hydraulic device () for rotation angle adjustment of a camshaft () relative to a crankshaft thereof, which is arranged on the drive-side end () of the camshaft () supported in several radial bearings () in the cylinder head () of the internal-combustion engine. The device essentially includes a drive unit () drivingly connected with the crankshaft and also of a driven unit () rotationally fixed to the camshaft (). The drive unit () is in force-transfer connection with the driven unit () through at least two pressure chambers (), which are formed within the device () and which can be charged with a pressurized medium, wherein the pressurized medium is fed from one of the radial bearings () of the camshaft () and supplied to the pressure chambers () of the device via first and second radial bore holes () and via first and second axial channels () in the camshaft (), and also via first and second axial channels () and via first and second radial bore holes () into the driven unit (). At least the first axial channels () formed as coaxial bore holes in the camshaft () and the first axial channels () in the driven unit () of the device () are connected to each other via a ring-shaped pressurized medium adapter () arranged between the end () of the camshaft () and the driven unit () of the device ().

Internal-combustion engine with a hydraulic device for a rotation angle adjustment of a camshaft relative to a crankshaft

Internal combustion engine with at least two camshafts arranged next to one another and in each case produced with a device for rotary angle adjustment with respect to a crankshaft

An internal combustion engine with two camshafts ( ) arranged side by side in the cylinder head ( ), each having a mechanism ( ) for varying the control timing of gas exchange valves is provided. The feeding and discharge of the hydraulic pressure medium to and from the mechanisms ( ) takes place through electromagnetic control valves ( ), each including a cartridge which can be inserted into a valve holder ( ) and an attached electromagnet ( ) which has an electrical socket ( ) located on its clear front side ( ). The valve holders ( ) are constructed as separate flanged connectors which are situated directly above the bearings of the camshafts ( ) on the cylinder head of the engine in such a way that the control valves ( ) are situated beside each other with their cartridges facing away from each other and with their electromagnets ( ) facing each other along a common longitudinal axis running transverse to the longitudinal axis of the camshafts ( ).

Internal combustion engine with at least two cam shafts arranged adjacent to each other in the cylinder head, particularly with an intake camshaft and an exhaust camshaft

A hydraulic camshaft adjusting device in a rotary piston design, which comprises a drive wheel ( ) that is drive-connected to a crankshaft and an impeller wheel ( ) connected in a rotationally fixed manner to a camshaft ( ), the drive wheel ( ) comprising a cavity formed by a peripheral wall ( ) and two lateral walls ( ), in which cavity at least one hydraulic working space is formed by at least two delimitation walls ( ), the impeller wheel ( ) has at least one radial blade ( ), and with each blade ( ) divides a hydraulic working space into two hydraulic pressure chambers, each blade ( ) of the impeller wheel ( ) is pressed by a spring element ( ), by its upper end surface ( ) against the peripheral wall ( ) of the drive wheel ( ) wherein each blade ( ) of the impeller wheel ( ) can additionally be pressed radially by the compressive force of the hydraulic pressure medium that can be selectively applied to its lower end surface ( ), by its upper end surface ( ) against the peripheral wall ( ) of the drive wheel ( ), the latter comprising, on one or both of its lateral surface(s), at least one additional pressure-medium channel ( ) starting from its lower end surface ( ).

Device for varying the control times of gas exchange valves of an internal combustion engine

A hydraulic camshaft-adjusting device of the rotary piston type that includes of a drive gear ( ) directly connected to a crankshaft and an impeller that is directly connected to a camshaft ( ). The drive gear ( ) has a cavity formed from a perimeter wall ( ) and two side walls ( ) inside of which at least one hydraulic working chamber is formed from at least two boundary walls. The impeller has at least one radial vane ( ) and each vane ( ) divides one hydraulic work chamber into two hydraulic pressure chambers. The outer end ( ) of each vane ( ) of the impeller is pressed radially against the perimeter wall ( ) of the drive gear ( ) as a result of the force of a spring element ( ) located at the inner end ( ) of the vane. The spring elements ( ) located at the inner end ( ) of the vanes ( ) have, at unchanged space requirements, a spring force that is greater than the pressure force of the hydraulic pressure medium acting on the outer end ( ) of the vanes ( ) in the respective actuated pressure chamber of the device ( ).

Device for changing the control timing of the gas exchange valves of an internal combustion engine, in particular a hydraulic camshaft adjustment device of the rotary piston type

Growing community of inventors

Frensdorf, Germany

Joachim Dietz