Abstract: The device comprises a rocker arm formed with a main bearing surface mounted on a main bearing and further bearing surfaces which co-operate with the upper ends of exhaust and inlet valves and pushrods respectively. Movement of one pushrod to open the inlet valve will turn the rocker arm a first axis and movement of the other pushrod to open the exhaust valve will turn the rocker arm about a second axis transverse to the first axis.

Abstract: A controllable operating spindle includes a decompression cam mounted thereon, which cam is able to keep a valve actuation-movement transmitting element in a position which is spaced away from the position determined by a base circle of a cam on the engine camshaft. A ratchet wheel is connected to the operating spindle which extends along the length of and parallel to the engine camshaft and is adapted to co-act with a trip element for restoring the decompression cam to its original position. The operating spindle includes at least one decompression cam for each cylinder of the engine and between the decompression cam and the valve actuation-movement transmitting element there is provided a decompression lever which influences the transmitting element in accordance with the lift of the decompression cam.

Abstract: An air-cooled internal combustion engine has a cylinder barrel which is detachably fastened in an opening of the crankcase by means of a bearing ring screwed from the inside of the crankcase on an external thread of the cylinder barrel. A flange of the bearing ring lies close to the inner surface of the crankcase and a ring nut is screwed from the outside of the crankcase on an external thread on the bearing ring, whereby the cylinder barrel is fixedly secured relative to the crankcase.

Abstract: A liquid cooled multi-cylinder internal combustion engine comprises a crankcase which extends above the crankshaft axis and a cylinder block which is fixed to the upper edge of the crankcase by means of a connecting flange arranged on the cooling jacket. The engine has two-part crankshaft main bearings which are connected to the cylinder block by means of through bolts. The cooling jacket of the cylinder block is shorter than the cylinder liners, and adjacent to the cooling jacket and extending to the end of the cylinder liners downward opening conduits are formed which are communicating with each other. These conduits are tightly covered by a cover plate, which is arranged between the lower end of the cylinder block and the upper bearing parts and serve for the oil supply, especially of the crankshaft main bearings of the engine.

Abstract: In a water-cooled multi-cylinder internal combustion engine the cylinder head is cast without the use of a core for the water jacket and is provided with cast channels of a predominantly longitudinal direction in the area of the upper ends of the cylinders, which are open towards the cylinderhead gasket, and with a bore for the cooling water going lengthwise through the cylinderhead in the vicinity of the valve guides. A continuous cast cooling channel is provided at one of the long sides of the cylinderhead only, which is open towards the cylinderhead gasket and is intended for cooling the upper cylinder ends. At least one inlet bore per cylinder is arranged at the long side opposite of the open cooling channel, which connects to the cooling water chamber in the cylinder block and ends in a crosshole going through the cylinderhead in the area of the valve bridges, or of the bore holding the spark plug or injection device, respectively.

Abstract: A decompression device for an internal combustion engine having a camshaft (4) with at least one cam (21) having a base circle (20) and a lobe elevated therefrom, a valve acting at a combustion chamber, and a transmitting member, e.g., a push rod (12), transmitting the lift of the cam (21) to the valve, has a control shaft (5), a decompression cam (11) and a ratched wheel (8) connected to the control shaft (5), and a shifting member (14) interworking with the ratched wheel (8) for resetting the decompression cam (11). The decompression cam (11) is arranged between the transmitting member and a cam-free part of the camshaft (4) and the shifting member (14) is arranged eccentrically at the camshaft (4) at a distance to the axis of the camshaft (4) which is greater than half the root diameter thereof.By this arrangement it is possible to lift the transmitting member, e.g., the push rod from the base circle of the cam of the camshaft without further supplementary means, simply by turning the decompression cam.

Abstract: A sealing element for a dividing gap (4) between two parts (2,3) which at least partly encloses a sealed space (1), comprises an elastic gasket element (5) fitted in the gap, and a connecting device (6) for connecting the two parts together. To achieve a reliable seal even where there are long gaps as well as to prevent the transmission of noise generating vibrations from one of the two parts to the other part through the gap an elastic initial tension element (11) is provided between the connecting device (6) and at least one of the two parts (2,3) which at least partly enclose the sealed space (1), and the connecting device (6) as well as the initial tension element is arranged within the interior of the sealed space (1).