Ina Walzlager Schaeffler Ohg

Ina Schaeffler Kg

Jens Sch&auml;fer

Martin Steigerwald

Matthias Kapp

Joachim Dietz

Andreas Strauss

Eduard Golovatai-Schmidt

Manfred Schindler

Michael Haag

Matthias Dohr

Hermann Golbach

An electromagnet having a hollow cylindrical coil former fitted with a coil winding and surrounded by a magnet housing. The coil former is bounded by upper and lower pole shoes. A nonmagnetic metal tube in the hollow cylinder of the magnet defines an armature space for a magnet armature that divides the armature space into first and second chambers, which are connected via a pressure equalizing channel in the magnet armature. A push rod passes through an axial hole in the lower pole shoe, to a control piston of a hydraulic valve, whose interior is connected via a further pressure equalizing channel in the lower pole shoe to the first chamber of the armature space. The push rod is a profiled rod contacting the magnet armature, the rod is of a cross-sectional shape different than that of the axial hole in the lower pole shoe and of a cross-sectional area less than that of the axial hole. The magnet armature has a central longitudinal hole of a diameter smaller than the largest profile width and larger than the smallest profile width of the push rod.

Electromagnet, in particular a proportional magnet for operating a hydraulic valve

A hydraulic camshaft adjusting device, which comprises a drive wheel ( ) and a pivotal impeller wheel ( ) connected in a rotationally fixed manner to a camshaft ( ), the drive wheel ( ) comprises 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 ( ) and the pivotal impeller wheel ( ) has at least one radial blade ( ), and with each blade ( ) divides a hydraulic working space ( ) into two hydraulic pressure chambers ( ), which are sealed off from one another by sealing elements ( ) disposed between the drive wheel ( ) and the pivotal impeller wheel ( ), the pivotal impeller wheel ( ) can be mechanically coupled to the drive wheel ( ) in a preferred basic position, a locking element ( ) disposed on the drive wheel ( ) being movable by a spring clement ( ) into a complementary seating ( ) in the drive wheel ( ).

Device for varying the valve control times of an internal combustion engine, especially a camshaft adjusting device with a pivotal impeller wheel

A device for independent hydraulic actuation of phase and axial positions of a camshaft of an internal combustion engine with a phase adjuster and an actuating piston arranged on a common axis for axial displacement of the camshaft. In order to reduce the space needed and construction expenditure of the device, the phase adjuster also acts as the actuating piston for the camshaft.

Device for independent hydraulic actuation of the phase and axial position of a camshaft

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

Arrangement for rotary angle positioning of a camshaft relative to the crank shaft of an internal combustion engine

The Invention concerns g solenoid valve, more particularly a proportional hydraulic valve which is arranged within a hydraulic system of a device for varying the valve timing of gas exchange valves in an internal combustion engine. The solenoid valve ( ) generally comprises an electromagnet ( ) having a hollow cylindrical magnet housing ( ), at least one coil winding ( ) and an armature ( ) as Well as a first pole shoe ( ) and a second pole shoe ( ) and further comprises a valve member ( ) having a hollow cylindrical valve housing ( ) for receiving a spool valve which is displaceable relative to the valve housing ( ) by the armature ( ) of the electromagnet ( ). According to the invention, the electromagnet ( ) and the valve member ( ) are connected and fixed radially and axially to each other by force locking and/or positive engagement by the second pole shoe ( ) of the electromagnet ( ) which is arranged adjacent the valve member ( ) and configured as a plug-in lock for the valve housing ( ).

Solenoid valve, particularly a proportional hydraulic valve

An electromagnet (,), particularly a proportional magnet for operating a hydraulic valve, said electromagnet (,) comprising at least one coil winding (,) carried by a hollow cylindrical coil spool (,) which is circumferentially surrounded by a hollow cylindrical magnet housing (,) and limited at each end by a pole shoe (,), said electromagnet (,) further comprising an axially moveable cylindrical armature (,) which is arranged in a hollow cylinder of the coil spool (,) that is configured as an armature space (,), the armature (,) being mounted for low friction in rotary, longitudinally moveable axial guides, and electromagnetically produced axial movements of the armature (,) can be transmitted to a hydraulic valve piston via a push rod (,) which is connected to the armature (,) to form an axial extension thereof. According to the invention, the rotary, longitudinally moveable axial guides of the armature (,) comprise at least one bushing-less linear ball bearing having a number of circumferentially spaced balls while being configured at the same time as an anti-stick means of the armature. The outer peripheral surface (,) of the armature (,) and/or the outer peripheral surface (,) of the push rod (,) is configured as an inner running track for the balls, and the inner peripheral surface of one or more components which limit the armature space (,) of the coil spool (,) forms an outer running track for the balls.

Electromagnet, particularly a proportional magnet for operating a hydraulic valve

A locking mechanism for a device (,) to modify the control timing of cylinder valves of an internal combustion engine, in particular for a vane-cell positioning device. The device (,) consists of a drive wheel (,) driven by a crankshaft of the internal combustion engine, said drive wheel having a cavity (,), and an impeller (,) permanently connected to the camshaft (,) that has at least one vane (,). In the cavity (,) of the drive wheel (,), at least one working chamber (,) is formed by intermediate walls (,) and each of these chambers is divided by an associated vane (,) into two hydraulic pressure spaces (,). When pressure is applied by means of a hydraulic pressure medium, the pressure spaces (,) effect a pivoting motion of the impeller (,) with respect to the drive wheel (,), whereas when the pressure is not applied to one of the pressure spaces (,) the impeller (,) and the drive wheel (,) are mechanically coupled together. The mechanical coupling between the impeller (,) and the drive wheel (,) of the device (,) is accomplished by at least one axially moving vane (,) of the impeller (,) which is designed both as a vane pivoting element and as a locking element.

Locking unit for a device for modifying the timing of charge change valves in internal combustion engines

The invention relates to a locking unit for a device for modifying the timing of charge change valves of an internal combustion engine, especially for a vane-cell control device. Said device (,) comprises a drive wheel (,) presenting a hollow space (,) and connected to a crankshaft of the internal combustion engine in a driving manner. The device also comprises an impeller (,) which has at least one vane (,) and is connected to the camshaft (,) in a non-rotating manner. At least one working chamber (,), which is divided by a vane (,) into two hydraulic pressure chambers (,), is formed by intermediate walls (,) in the hollow space (,) of the drive wheel (,). When the pressure chambers (,) are subjected to pressure by means of a hydraulic pressure medium they cause the impeller (,) to pivot in relation to the drive wheel (,). When there is no pressure in one of the two pressure chambers (,) the impeller (,) and the drive wheel (,) are mechanically coupled to each other. According to the invention the mechanical coupling between the impeller (,) and the drive wheel (,) of the device (,) can be achieved by means of at least one radially movable vane (,) of the impeller (,) which is configured as both an impeller pivoting element and a locking element.

Locking unit for a device for modifying the timing of charge change valves in internal combustion engines, especially for a vane-cell control device

A vane-type camshaft adjusting device for an internal combustion engine, with a drive pinion (,) connected in driving relationship to a crankshaft, and a winged wheel (,) connected rotationally fast to a camshaft. The drive pinion (,) a hollow space (,) which is defined by a circumferential wall (,) and two side walls (,), into which hollow space (,) is inserted the winged wheel (,) having at least two wings (,) on its wheel hub (,). Limiting walls (,) define at least two working chambers (,) in the hollow space (,) of the drive pinion (,), and each of these working chambers (,) is divided into two hydraulic pressure chambers (,) by one of the wings (,) of the winged wheel (,). The limiting walls (,) of the drive pinion (,) are in sealing contact by axial sealing strips (,) with the wheel hub (,) of the winged wheel (,), while the wings (,) of the winged wheel (,) are in sealing contact by axial sealing strips (,) with the circumferential wall (,) of the drive pinion (,). According to the invention, the sealing strips (,) of the limiting walls (,) of the drive pinion (,) and/or the sealing strips (,) of the wings (,) of the winged wheel (,) are connected to one another to form a one-piece or a multi-piece sealing cage (,) by which the hydraulic pressure chambers (,) in the hollow space (,) of the drive pinion (,) are sealed from one another both radially on the circumferential wall (,) of the drive pinion (,) and/or on the wheel hub (,) of the winged wheel (,) as also axially on the side walls (,) of the drive pinion (,).

Growing community of inventors

Herzogenaurach, Germany

Jens Schäfer

Growing community of inventors

Herzogenaurach, Germany

Jens Sch&auml;fer

Jens Schäfer