Abstract: A known electromagnetic actuator comprises two electromagnets arranged opposite one another, an armature that is movable back and forth between the electromagnets against the force of two mutually counteracting springs, as well as adjusting means for adjusting the idle or rest position of the armature. In this regard, it is shown to be disadvantageous, that after several hours of operation a readjustment of the pre-tension of the springs determining the rest position may be necessary. The new method is to enable an adjustment of the pre-tension of the springs that is durable and optimal for the operation of the actuator. This is achieved in that the springs are compressed in repeating compression cycles so often until the energy respectively stored therein due to their compression no longer or only insignificantly differs from the energy stored in the respective spring in a preceding compression cycle, and in that the adjustment of the pre-tension of the springs is only carried out thereafter.

Abstract: In order to form contact between a control unit and current loads of an internal combustion engine by electrical components through a cylinder head cover which is seated on a cylinder head of the internal combustion engine, a method includes a pre-fixing step for the electrical components, from which step the electrical components are moved into a fixed position directly or indirectly in the cylinder head cover, after the cylinder head cover has been fitted onto the cylinder head, in order to subsequently connect the electrical components to the control unit.

Abstract: A torsion bar spring of spring steel with a high carbon content is connected fixedly in terms of rotation at its ends to structural parts. The structural parts are mounted pivotably in relation to one another. The torsion bar spring is connected in a materially integral manner to at least one of the structural parts by friction welding, condenser discharge welding, diffusion welding or medium-frequency pressure welding via intermediate pieces. As a result, a play-free and wear-free connection between the torsion bar spring and the structural part can be made in a confined construction space, and the connection is suitable for absorbing high loads, particularly alternating loads.

Abstract: A device for operating a gas shuttle valve through an electromagnetic actuator secured and mounted in a component which has an opening and a closing magnet with an axially displaceable armature between the opening and closing magnet. The armature acts through the use of an armature plunger in conjunction with a spring system on a valve stem. A play-compensation element is arranged between the armature plunger and the valve stem.

Abstract: In an electromagnetic actuator for actuating a gas exchange valve of an internal combustion engine, the actuator includes at least one electromagnet which is arranged in a housing and acts on an armature through which at least one passage extends transversely with respect to the direction of movement of the armature for conducting a coolant through the armature.

Abstract: In a device for actuating at least one gas exchange valve of an internal combustion engine, comprising at least one pivoting armature, which is operatively connected to the gas exchange valve, and at least one first and at least one second electromagnetic units for actuating the pivoting armature, the pivoting armature is included in a first functional group with an armature housing and at least one of the two electromagnetic units is included in a second functional group and the functional groups are interconnected by connection means.

Abstract: In order to form contact between a control unit and current loads of an internal combustion engine by electrical components through a cylinder head cover which is seated on a cylinder head of the internal combustion engine, a method includes a pre-fixing step for the electrical components, from which step the electrical components are moved into a fixed position directly or indirectly in the cylinder head cover, after the cylinder head cover has been fitted onto the cylinder head, in order to subsequently connect the electrical components to the control unit.

Abstract: In a device for operating a gas exchange valve of an internal combustion engine having an electromagnetic actuator including a valve opening magnet and a valve closing magnet, between which there is arranged an armature which, together with an opening spring, engages a valve stem against the force of a closing spring, and a hydraulic play-compensating element is arranged in the valve operating force transmission structure, the hydraulic play-compensating element is installed in the transmission structure together with a mechanical adjusting element providing for minimal valve play when the engine is shut down.

Abstract: In an electromagnetic actuator for actuating a gas exchange valve of an internal combustion engine, the actuator includes at least one electromagnet which is arranged in a housing and acts on an armature through which at least one passage extends transversely with respect to the direction of movement of the armature for conducting a coolant through the armature.

Abstract: An electromagnet device includes at least one electromagnet having at least one coil and at least one core built up from laminations. At least individual laminations are connected and reinforced by at least one profiled element.

Abstract: In a device for operating a gas exchange valve of an internal combustion engine having an electromagnetic actuator including a valve opening magnet and a valve closing magnet, between which there is arranged an armature which, together with an opening spring, engages a valve stem against the force of a closing spring, and a hydraulic play-compensating element is arranged in the valve operating force transmission structure, the hydraulic play-compensating element is installed in the transmission structure together with a mechanical adjusting element providing for minimal valve play when the engine is shut down.

Abstract: In a device for actuating a gas exchange valve of an internal combustion engine, which actuating device includes an electromagnetic actuator and is floatingly supported on the cylinder head so as to provide for a play compensation structure, axially spaced valve opening and closing magnets having opposite pole faces are arranged in spaced relationship and an armature is axially movably disposed between the opposite pole faces and connected to the valve shaft of the gas exchange valve, and valve closing and opening springs are disposed at opposite sides of a spring support plate mounted for movement with the valve shaft, wherein the valve closing spring is supported on the actuating device and means are provided for biasing the actuating device into a valve closing direction.

Abstract: In an arrangement for providing electrical connections between an engine control unit and electric power consumers disposed on a cylinder head of an internal combustion engine, particularly an electromagnetic valve control arrangement, wherein the cylinder head comprises a first housing part and a second housing part consisting of a frame structure mounted onto the first housing part. The second housing part includes electrical components with receptacles which are connected outside the second housing part to the engine control unit and the power consumers have communication lines provided with plugs plugged into the receptacles within the second housing part for electrical connection to the engine control unit. A cylinderhead cover is mounted onto the frame structure.

Abstract: In an arrangement and method for adjusting an electromatic gas change valve including: an opening and a closing magnet for operating a valve member of the gas change valve; an armature disposed between the opening and closing magnets and operative for movement with the valve member; and an upper and a lower valve spring engaging the valve member and arranged in opposition to each other under pretension so as to hold the valve member and the armature in an equilibrium position, adjustment means are provided for adjusting the equilibrium position during valve operation wherein the current consumption values of the opening and closing magnets over time are measured and integrals thereof are formed in an evaluation unit and the adjustment means are adjusted until the integrals reach a predetermined value corresponding to the desired equilibrium position.

Abstract: An arrangement for an electromagnetic valve timing gear has an armature plate which can be adjusted between two end positions and which is held in the end positions by a solenoid system having switching magnets. A spring device with a resilient element is provided on the valve tappet such that, when the solenoid system is not excited, the armature plate takes up an approximate center position between the two switching magnets. The resilient element of the spring device is arranged between two spring plates. The spring plates have an opening, in which case the valve tappet and the spring plate are arranged to be relatively displaceable. On the side of the valve plates facing away from the resilient element, one drive device respectively is provided on the valve tappet, and one path limiting device respectively is provided for the spring plates.