Abstract: An internal combustion engine includes a drive connection for auxiliary equipment. The equipment includes a step-down gear and a pump impeller of a coolant pump and a pump wheel of a lubricating oil gear pump situated on a common shaft. The drive connection of the engine is characterized in that pump wheels of the lubricating oil gear pump form the step-down gear for the coolant pump.

Abstract: A cooling arrangement for liquid-cooled internal combustion engines, with the cooling arrangement including a heat exchanger constructed as a radiator for effecting cooling between air and a coolant liquid. The cooling arrangement includes a housing accommodating a thermostat with a mixing chamber, defined in the housing, being connected with a return flow coolant tank. The thermostat is adapted to provide for temperature dependent regulated portions of cooled and uncooled liquid coolant flowing into the mixing chamber. The housing of the thermostat, a bypass connection piece, and an outlet connection of the housing are molded, in one piece to the return flow coolant tank of the heat exchanger. A lid or cover provided with recesses as well as window-like openings formed in a portion of the housing form an inside connection between the return flow coolant tank and the mixing chamber with the connection being controlled by a radiator valve disk of a thermostat insert of the thermostat.

Abstract: An in-line multicylinder internal combustion engine comprising an engine block including a cylinder crank housing having disposed therein a plurality of approximately horizontally disposed cylinders and a cylinder head mounted on the cylinder crank housing. An approximately horizontally disposed crankshaft is disposed in the cylinder crank housing for reciprocably displacing pistons in the respective cylinders, and an exhaust system is provided which begins at an underside of the cylinder head. A first housing cover is disposed on the cylinder head and extends in a longitudinal direction of the crankshaft with a second cover being disposed on the cylinder crank housing in an area of the crankshaft and extenging in a longitudinal direction thereof. The first and second housing covers each have essentially smooth lateral outer housing walls, with a cooling arrangement being mounted above an upper forward edge of the engine block.

Abstract: A motorcycle power train arrangement is disclosed which comprises a liquid cooled engine block and a transmission case, substantially exposed and mounted symmetrically to the longitudinal median plane of the motorcycle, largely filling the space between the front wheel and the rear wheel, and including a liquid coolant radiator mounted in substantially vertical position transversely to the direction of travel, a plurality of parallel cylinders being arranged transversely and a crankshaft longitudinally to the direction of travel, the transmission case being located under and/or behind the engine block, and a valve chamber cover forming a symmetrical outer longitudinal limit of the power train; characterized in that the cylinders are located on one side of the engine block in a single line; in that the crankshaft is located on the other side of the engine block and is spaced from and parallel to the longitudinal median plane; and in that covers for the valve chamber and a crank space form on both sides symmetr