Daimler-benz Ag

Helmut Dobler

Karl Zeilinger

Wolfgang Kizler

Hans-Joachim Schopf

Heinz Lamm

Roland Gluck

Helmut Seitz

Rolf Zeller

Kurt Nadolny

Wolfgang Sieder

Horst Piry

An axially flexible drive disc of sheet-metal for vehicle propulsion includes a centrally disposed flange for attachment to the end of the drive shaft of the vehicle propulsion engine and is connected at its external circumference at a few, preferably three, fastening points, located evenly distributed around the periphery, to the input element of the adjacent gearbox. The gear box includes a hydrodynamic torque converter as the input element with the converter housing simultaneously assuming the flywheel function for the vehicle propulsion engine. In order to increase the strength of the drive disc with respect to axial fatigue loads, to smooth offset and swash and to reduce frettage corrosion at the fastening elements, the force path from the central flange connection to the radially outwardly located fastening points is given a spiral shape to assure greater bending lengths, by kidney-shaped cutouts disposed between the fastening points and the flange connection so that, as a rough approximation, T-shaped spring elements are left between neighboring cutouts.

Axially flexible drive disc

A bearing arrangement for the balance shafts for balancing second order inertia forces on an internal combustion engine, in which the balance shafts run parallel to the crankshaft on both longitudinal walls of the crankcase, and have the ends carrying the balance weights supported by means of journal bearings within the crankcase and having driven ends supported by means of roller bearings outside the crankcase in the region of a crankcase end wall.

Internal combustion engine balance shaft bearing arrangement at the

A method for manufacturing a housing casing for a rotary piston internal combustion engine, especially of trochoidal construction, as well as the housing casing made according to this method, whereby the housing casing consists of light metal whose internal running surface for the piston consists of a coating of hard material; the method thereby involves leaving during the machining of the inner wall of the housing casing a material island of such light metal about the discharge opening of the already bored or still to be bored spark-plug-firing channel, whose height corresponds at least to the thickness of the coating to be subsequently provided along the inner contour of the housing casing in the finish-machined condition; as a result thereof the area of the discharge opening of the firing channel is constituted exclusively of such light metal.

Method for producing a housing casing for a rotary piston internal

A rotary piston internal combustion engine of trochoidal construction which includes a housing casing with hollow spaces for a cooling media disposed between housing inner and housing outer walls, whose outer wall is provided with a cooling medium channel; a polygonal piston rotates within the housing casing and slides along its inner wall, and at least one cooling medium bore constructed as nozzle is provided which branches off from the cooling medium channel, is arranged in the housing outer wall and is directed toward the hottest area of the housing inner wall.

Rotary piston internal combustion engine of trochoidal construction

Growing community of inventors

Esslingen, Germany

Helmut Dobler