Abstract: A method for the machine-milling of intake and/or exhaust ducts formed in a cylinder head includes working off the inner wall surfaces of the intake and/or exhaust ducts at least in part, preferably completely, with a multi-axis, preferably five-axis, CNC-controlled cherry head in a stabbing movement. Grooves are thus formed in the inner wall surfaces that extend primarily in the flow direction of the ducts.

Abstract: A piston has a piston head, a piston pin support projecting from the piston head, and a mantle wall connected to the piston head. The mantle wall is formed with two tubular pieces that are disposed concentrically relative to one another and which are connected at a periphery of the piston head. A hollow space is formed between the tubular pieces.

Abstract: An engine cylinder with a piston and at least one, preferably two or four, cam-operated valves leading to the combustion chamber. A valve seat of the valve is formed in the cylinder wall immediately laterally adjacent to the cylinder bore or to the cylinder chamber. The valve axis and the cylinder axis enclose an acute angle A of 5°?A?25°, preferably 10°?A?20°. The axis of the inlet channel or the outlet channel leading to the valve seat in a plane defined by the valve axis and the cylinder axis is inclined at an angle B of 25°?B?65°, preferably 40°?B?50° to the valve axis.

Abstract: A piston has a piston crown, a piston pin support that extends from the piston crown, and a skirt wall that is connected to the piston crown. The skirt wall has two tubular pieces which are concentrically arranged relative to each other and each of which is connected to the piston crown in the circumferential region of the piston crown. A hollow space cavity is formed between the tubular pieces and a coolant is disposed in the cavity.

Abstract: An opposed piston engine has an outer piston and an inner piston, which are disposed in a cylinder and are driven in opposite directions and delimit a common combustion chamber. The inner piston drives a crankshaft via a connecting rod and the outer piston drives the crankshaft via a pair of traction connecting rods. The outer piston is supported by a connecting rod that is guided linearly in a guide block, and the connecting rod protrudes from a bridge that is connected at both end portions to a traction connecting rod. Accordingly, it is provided that each traction connecting rod contains a U-shaped curved piece of tube, preferably with parallel legs, which with its U-shaped curved portion encloses a part of the circumference of the pivot bearing supported by the bridge and is fixed, especially bolted, with its leg ends onto a traction connecting rod bearing mounted on the crankshaft.

Abstract: A cylinder of an externally fired, two-stroke engine has at least two exhaust channels. At least the inflow openings of the exhaust channels are located or formed symmetrical in relation to a plane of symmetry containing a longitudinal center axis of the cylinder. The inflow openings of the exhaust channels lying above each other in the cylinder wall surface and spaced apart by wall webs lie distributed over a peripheral region of the cylinder wall surface which in relation to the longitudinal center axis corresponds to a central angle Z of 175°?Z?280°, preferably 180°?Z?265°.

Abstract: A W6 engine has two W3 engine units disposed juxtaposed on a common crankshaft. Exhaust pipes of the cylinders containing the pistons driving the common crankshaft are guided to an exhaust. Each cylinder has at least one intake valve and at least one exhaust valve. The intake valves for the individual cylinders are disposed in wall portions of the respective cylinders oriented in the same circumferential direction about the crankshaft or lateral portions of their cylinder head. The exhaust valves for the individual cylinders are disposed in opposite circumferential direction. Each exhaust valve closes an exhaust pipe, which is led from the valve seat of the exhaust valve to the outer surface of the W3 engine unit in which the cylinder with the exhaust valve is disposed.

Abstract: A bearing connection having a connecting rod connected rigidly to a piston and a crankshaft driven by the connecting rod. The connecting rod is connected on the crankshaft side to a transverse bearing for a sliding block, the sliding block being mounted such that it can move to and fro in the transverse bearing and a rolling contact bearing being arranged in the sliding block in order to receive the crank pin of a crankshaft. At least one cavity is formed in the piston crown and, in the area thereof close to the piston longitudinal axis, is connected to an oil feed line running through the connecting rod and that the oil feed line in the connecting rod is led or extended to the end region thereof remote from the piston and, from there, is led onward into the interior of the transverse bearing via a transfer channel.

Abstract: A piston includes a piston head, two skirt walls disposed opposite one another and at least one pin bearing disposed between the skirt walls and supported on the piston head. Each skirt wall extends over a partial region of the periphery of the piston or piston head. The two skirt walls are connected by at least one self-supporting support wall disposed at a distance from the piston head. A cylinder and piston assembly and a piston ring for a cylinder, are also provided.

Abstract: An engine has a cylinder, in which two pistons are mounted which are driven in opposite directions. Each piston drives, via a crankshaft, a toothed disk which is attached on the crankshaft. The two toothed disks are coupled to one another with regard to their rotational movement, or the toothed disks that are attached to the two crankshafts are in meshing engagement with one another. The crankshafts are driven by the pistons to produce a rotational movement in opposite directions. The toothed disks have the same diameter and are in direct engagement with one another by way of teeth which are arranged or formed along their circumference.

Abstract: A W6 engine has two W3 engine units disposed juxtaposed on a common crankshaft. Exhaust pipes of the cylinders containing the pistons driving the common crankshaft are guided to an exhaust. Each cylinder has at least one intake valve and at least one exhaust valve. The intake valves for the individual cylinders are disposed in wall portions of the respective cylinders oriented in the same circumferential direction about the crankshaft or lateral portions of their cylinder head. The exhaust valves for the individual cylinders are disposed in opposite circumferential direction. Each exhaust valve closes an exhaust pipe, which is led from the valve seat of the exhaust valve to the outer surface of the W3 engine unit in which the cylinder with the exhaust valve is disposed.

Abstract: A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction.

Abstract: A bearing connection having a connecting rod connected rigidly to a piston and a crankshaft driven by the connecting rod. The connecting rod is connected on the crankshaft side to a transverse bearing for a sliding block, the sliding block being mounted such that it can move to and fro in the transverse bearing and a rolling contact bearing being arranged in the sliding block in order to receive the crank pin of a crankshaft. At least one cavity is formed in the piston crown and, in the area thereof close to the piston longitudinal axis, is connected to an oil feed line running through the connecting rod and that the oil feed line in the connecting rod is led or extended to the end region thereof remote from the piston and, from there, is led onward into the interior of the transverse bearing via a transfer channel.

Abstract: An engine cylinder with a piston and at least one, preferably two or four, cam-operated valves leading to the combustion chamber. A valve seat of the valve is formed in the cylinder wall immediately laterally adjacent to the cylinder bore or to the cylinder chamber. The valve axis and the cylinder axis enclose an acute angle A of 5°?A?25°, preferably 10°?A?20°. The axis of the inlet channel or the outlet channel leading to the valve seat in a plane defined by the valve axis and the cylinder axis is inclined at an angle B of 25°?B?65°, preferably 40°?B?50° to the valve axis.

Abstract: An engine piston has a connecting rod connected rigidly to the piston. At least one cavity is formed in the piston head, the cavity communicating in the region thereof close to the piston longitudinal axis with an oil supply line running through the connecting rod. The cavity is formed by a number of channels which run, preferably radially, in the piston head and are connected to one another in the circumferential region of the piston via an annular space or an annular line, and wherein a return line leading to the connecting rod is connected to the annular space or the annular line. The cavity or the channels forming the cavity and/or the return line are inclined at an angle of 1° to 4°, preferably 1° to 3°, to a plane perpendicular to the piston longitudinal axis.

Abstract: A method for the combustion of a fuel-air mixture present in the combustion chamber of an engine cylinder. At least a part of the fuel, in particular all of the fuel, is introduced immediately prior to the ignition time with a mean fuel droplet size of ?20 ?m, preferably ?10 ?m, as defined by the mean Sauter diameter, in the direction of at least one ignition path situated in the central region of the piston crown (4), and the fuel-air mixture is ignited by way of one or a number of successive ignition sparks.

Abstract: A method for the machine-milling of intake and/or exhaust ducts formed in a cylinder head includes working off the inner wall surfaces of the intake and/or exhaust ducts at least in part, preferably completely, with a multi-axis, preferably five-axis, CNC-controlled cherry head in a stabbing movement. Grooves are thus formed in the inner wall surfaces that extend primarily in the flow direction of the ducts.

Abstract: An opposed piston engine has an outer piston and an inner piston, which are disposed in a cylinder and are driven in opposite directions and delimit a common combustion chamber. The inner piston drives a crankshaft via a connecting rod and the outer piston drives the crankshaft via a pair of traction connecting rods. The outer piston is supported by a connecting rod that is guided linearly in a guide block, and the connecting rod protrudes from a bridge that is connected at both end portions to a traction connecting rod. Accordingly, it is provided that each traction connecting rod contains a U-shaped curved piece of tube, preferably with parallel legs, which with its U-shaped curved portion encloses a part of the circumference of the pivot bearing supported by the bridge and is fixed, especially bolted, with its leg ends onto a traction connecting rod bearing mounted on the crankshaft.

Abstract: An engine cylinder has a feed duct and a charge movement duct, which are each led adjacent to one another to an inlet valve in the cylinder head of the engine cylinder. A through flow of the two ducts is regulated by a common throttle valve extending in the or over the two ducts or their inflow openings, with which the end portions of the two ducts remote from the combustion chamber or their inflow openings can be closed.

Abstract: A cylinder of an externally fired, two-stroke engine has at least two exhaust channels. At least the inflow openings of the exhaust channels are located or formed symmetrical in relation to a plane of symmetry containing a longitudinal center axis of the cylinder. The inflow openings of the exhaust channels lying above each other in the cylinder wall surface and spaced apart by wall webs lie distributed over a peripheral region of the cylinder wall surface which in relation to the longitudinal center axis corresponds to a central angle Z of 175°?Z?280°, preferably 180°?Z?265°.