Daimler Ag

Daimler Chrysler Ag

Alexander Gaisberg-Helfenberg

Thomas Stolk

Jens Meintschel

Martin Schlegl

Karl-Heinz Thiemann

Markus Lengfeld

Matthias Gregor

Tilmann Römheld

Dietmar Schröer

Zdenka Hora

Thomas Marko Hora

An adjusting device, in particular for adjustment of a camshaft of an internal combustion engine, is disclosed. The adjusting device includes a brake unit which has at least one brake disc and at least one electromagnet for actuating the brake unit. The electromagnet has a yoke and an armature formed separately from the brake disc, where the brake disc is disposed at least partially spatially between the yoke and the armature of the electromagnet.

Adjusting device, in particular for adjusting a camshaft of an internal combustion engine

In an internal combustion engine for a motor vehicle, comprising a crankcase and a crankshaft accommodated therein, and a cylinder housing including at least one cylinder with a cylinder head, the cylinder housing with the cylinder head is supported directly on the crankshaft via eccentric elements which are pivotable for adjusting a position of the cylinder housing with the cylinder head relative to the crankshaft with the crankcase () for changing the compression ratio of the engine.

Variable compression ratio internal combustion engine with displaceable cylinder head and cylinder housing

In a valve drive arrangement for an internal combustion engine including a camshaft carrying axially movable cam elements provided with cams for operating gas exchange valves of the internal combustion engine and an actuation device having at least one shift element which is provided to shift cam element by means of a shifting gate between opposite axial positions, the valve drive arrangement has a change-over device for changing the axial shift direction of the shift element from one to the opposite axial position.

Valve drive device

In an internal combustion engine including cylinders arranged in a housing, a crankshaft, pistons disposed in the cylinders so as to be movable by the crankshaft, and a device for varying a compression ratio of the internal combustion engine wherein the device, for varying the compression ratio, includes an adjusting structure which varies the effective length of a connecting rod of the piston, the lift of the crankshaft or the position of the cylinder with respect to the center of the crankshaft, an operating structure is provided by rotation of which the position of the adjusting structure can be controlled, and a drive device for controlling the operating structures contains a coupling mechanism with an integrated brake function, whereby h the adjusting structure can either be placed in operative connection with the crankshaft or can be blocked.

Internal combustion engine having a variable compression ratio

In a camshaft adjusting device including a positioning actuator for adjusting a phase position of a camshaft with respect to a crankshaft of an internal combustion engine, wherein the camshaft is driven by the crankshaft via a drive input, and a base drive torque of the camshaft is provided by a positioning actuator, a spring element is arranged between the camshaft and the crankshaft and has a spring torque selected so as to compensate for at least part of a mean load torque of a load unit connected to the camshaft to be driven thereby and at most only a part of the base drive torque.

Camshaft adjusting device

The invention relates to a multi-piece valve for reciprocating piston engines in which the valve stem is connected to the valve head in a manner resistant to both tension and compression. In the area of a center through-opening the valve head has an annular bearing surface for a stem-side flange. In addition, the center opening widens on the combustion chamber-side of the valve head, the head-side end of the valve stem being plastically expanded so that it fills this enlargement, forming a positive interlock. In order to improve the service life of the connection between valve head and valve stem, according to the invention the combustion chamber-side enlargement of the center opening and accordingly also the conformed, end-side expansion of the valve stem are of non-circular design so that a positively interlocking torsionally fixed connection is produced between the valve stem and the valve head.

Growing community of inventors

Beilstein, Germany

Alexander Gaisberg-Helfenberg