Abstract: An engine power section for piston engines, particularly V-engines, having a power unit block made of an iron material arranged in a casing of light metal. In order to achieve a stiff weight-reducing power unit block, a flange plate used for limiting the crank space as well as for the connection with the casing is arranged offset relative to a cylinder from its lower end toward its upper end with its front side surface center of gravity at a distance on this side of the bearing center plane of a crankshaft bearing, which corresponds at least to a largest possible distance of the surface center of gravity of a reinforcing profile of a bearing frame on the other side of the bearing center plane. The crankshaft bearings are connected with the flange plate by way of struts.

Abstract: To enable preventing interference between a honing machine and a journal wall, avoiding large-sizing of a cylinder block and tilting a front cylinder part so that the upper end is as low as possible in a vehicular V-type internal combustion engine wherein the front cylinder part arranged on the front side in a vehicular travel direction and a rear cylinder part arranged on the rear side in the vehicular travel direction are arranged so that they form an approximate V-shape. A front cylinder part is tilted so that the upper end is lower than that of a rear cylinder part and a bent part bent on the side distant from a central position is formed in a part corresponding to a front cylinder hole of a journal wall arranged on the side displaced from the central position between both journal walls of the front cylinder hole.

Abstract: An arrangement for improving the cooling performance of an engine by suitably arranging an exhaust pipe and a valve mechanism with respect to the inclined direction of a cylinder block. A cylinder block is inclined in the rightward or leftward direction of a vehicle body, and an exhaust pipe and a valve mechanism are disposed along the inclined side wall of the cylinder block. The opposed side wall of the cylinder block, which has a large space in the vertical direction and exerts a large effect on the cooling performance of the engine, is less susceptible to thermal effects from the exhaust pipe and the valve mechanism, to thereby improve the cooling performance of the entire engine.

Abstract: A power unit for a vehicle constructed by combining an internal combustion engine and a transmission integrally is provided. A crankshaft rotatably supported in front and rear crankcases of the internal combustion engine is positioned biased slightly toward right side from the center of the crankcases, a cylinder block and a cylinder head is inclined toward the left so as to extend obliquely leftward and upward from the crankshaft, on the left side of the crankshaft are arranged a main shaft and an auxiliary shaft of the transmission in turn, at a middle and upper portion between the main and auxiliary shafts a reverse shaft, and below the auxiliary shaft a driving shaft. On the right side of the crankshaft is arranged a cam shaft. These shafts are parallel with each other and directed in the vehicle running direction.

Abstract: A vehicle and drive unit therefor including a transversely disposed engine located in an engine compartment. The engine is of the dry sump lubrication type and has a lubricant reservoir that extends between the cylinders and an air inlet opening to the engine compartment. The cylinders are inclined to the rear from a vertical plane at an acute angle and the engine crankshaft drives an output shaft that rotates in a plane disposed at an acute angle to the vertical and forwardly of the cylinder axis and at an acute angle to the cylinder axis. The oil scavenge and pressure pumps are driven from this shaft as are the front wheel axles which lie on the opposite side of the plane containing the cylinder axis from the output shaft axis.

Abstract: A vehicle and drive unit therefor including a transversely disposed engine located in an engine compartment. The engine is of the dry sump lubrication type and has a lubricant reservoir that extends between the cylinders and an air inlet opening to the engine compartment. The cylinders are inclined to the rear from a vertical plane at an acute angle and the engine crankshaft drives an output shaft that rotates in a plane disposed at an acute angle to the vertical and forwardly of the cylinder axis and at an acute angle to the cylinder axis. The oil scavenge and pressure pumps are driven from this shaft as are the front wheel axles which lie on the opposite side of the plane containing the cylinder axis from the output shaft axis.

Abstract: A power plant for a front engine front drive type automotive vehicle. The power plant is comprised of a forward and transversely mounted engine having a cylinder block with which a transaxle is joined through a plurality of joining points with bolts. The final drive unit of the transaxle includes a differential and projects laterally from the transmission. The center axis of the differential is offset low relative to the center axis of a crankshaft of the engine. The engine is disposed to incline rearward relative to the vehicle such that the inclination of the bottom face of the cylinder block relative to a horizontal plane is larger than the inclination of a line connecting the differential center axis and the differential center axis relative to the horizontal plane, thereby rigidly supporting the final drive unit.

Abstract: An engine having a crank case splitted into upper and lower crank cases, and including a crank shaft and a transmission drive shaft disposed on the split plane between the upper crank case and the lower crank case and a transmission main shaft carried by either one of the upper or lower crank case. The length and the size of the engine can be reduced by the arrangement according to the invention, and a starter motor, a transmission drum and balancers can be arranged efficiently to save space required for mounting the engine.

Abstract: An engine is disposed in a front portion of an automobile and has a crankshaft extending in a longitudinal direction of the automobile. A transmission is coupled to a rear end of the engine and a final speed reduction gear unit is disposed laterally of the engine and separate from the transmission. The output shaft of the transmission and the input shaft of the final speed reduction gear unit are interconnected by an intermediate transmission shaft. A steering mechanism for turning front wheels of the automobile includes a steering tie rod coupled to the front wheels and disposed downwardly of the intermediate shaft between the transmission and the final speed reducer gear unit. The engine includes a cylinder having an axis inclined from the vertical in a transverse direction of the automobile, the final speed reduction gear unit being disposed on the side of the engine away from which the axis of the cylinder is inclined.

Abstract: Several embodiments of power units particularly adapted for transverse engine operation for driving the wheels of a motor vehicle. In all of the embodiments, the axles are disposed on one side of the engine and a change speed transmission is located on the other side of the engine. The change speed transmission is driven from a gearing arrangement located between the ends of the crankshaft and in some embodiments torsional vibration dampers are included in the drive for the change speed transmission. Vibration dampers are affixed to one or both ends of the crankshaft in some embodiments and an auxiliary shaft is driven from the transmission primary shaft for operating the camshafts of the engine.

Abstract: A drive system for a vehicle (V) provided with a power plant (P) which includes an engine (1), a transmission (3) and a differential device (D). The engine is located longitudinally of the vehicle with the crankshaft extending front-to-rear of the vehicle. The power plant drives left and right drive wheels disposed on opposite sides of the engine. The engine has a cylinder axis (L.sub.1 --L.sub.1) inclined to the left or right of the vehicle and includes a cylinder block (6) and an oil pan (13) between which is interposed a lower case (9). The cylinder block and the lower case are joined together at joining surfaces thereof on a plane which extends through the center (O) of the journal bearings (10) for the crankshaft as well as perpendicular to the cylinder axis. The differential case (17) is connected to the lower side face of the engine on the side of inclination of the engine.

Abstract: Herein disclosed is a power plant structure which generally includes an engine part and a transmission part. In order to increase the rigidity of the power plant structure, the cylinder block of the engine is tightly connected by bolts to a mounting portion integrally formed on a transmission case. For more assured rigidity, a ladder beam structure is tightly disposed between the cylinder block and the mounting portion.

Abstract: Components in or for self-powered vehicles, including in particular an integrated power unit in which a reciprocating-piston internal combustion engine and a transmission system are formed as a compact, single structural item in which the engine cylinders and the principal rotary members of the transmission are all located to one side of a plane which lies normal to the cylinder axes and includes the engine crankshaft axis. Compactness and simplicity are further promoted by designing the casing structure of the power unit to include an indivisible main component which encases parts of both the engine and the transmission system. The invention also includes features combined with and/or related to such a power unit, including a specific design for the transmission system, an arrangement of the induction system for the engine, installation arrangements for the power unit within vehicles, and related vehicle suspension systems.

Abstract: An overhead valve engine including a bottom mounting part and a crankcase mounted on and extending upwardly from the mounting part. A crankshaft and a camshaft are rotatably mounted on the crankcase, the shafts being at substantially the same vertical height above the mounting part. A cylinder is formed in the crankcase and has a cylinder axis which slants at an angle of substantially 45.degree. upwardly and over said cam shaft. Air intake and exhaust valves are provided at the upper end of the cylinder, a curburetor is mounted on a side of the crankcase at a level which is below the valves, and an air inlet manifold extends from the air intake valve downwardly to the carburetor. Two push rods extend between the camshaft and the valves, and the air inlet manifold extends between the two push rods.

Abstract: Components in or for self-powered vehicles, including in particular an integrated power unit in which a reciprocating-piston internal combustion engine and a item in which the engine cylinders and the principal rotary plane which lies normal to the cylinder axes and includes the engine crankshaft axis. Compactness and simplicity are further promoted by designing the casing structure of the power unit to include an indivisible main component which encases parts of both the engine and the transmission system. The invention also includes features combined with and/or related to such a power unit, including a specific design for the transmission system, an arrangement of the induction system for the engine, installation arrangements for the power unit within vehicles, and related vehicle suspension systems.

Abstract: An air inlet means for use with the two cylinder internal combustion V-type engine. The air inlet device includes a carburetor, an air cleaner and an air associated with each cylinder. Such carburetors and inlet pipes are arranged so as to be positioned between the engine cylinders with the air cleaners extending outwardly from between the cylinders so as not to interfere with the fuel tank.

Abstract: A crankcase having a unitary transverse bearing wall through which a crankshaft is mounted. The bearing wall includes blind holes extending passed the bearing hole on either side thereof for receipt of high strength bolts extending therein.

Abstract: The cylinder head and crankcase housing of an internal combustion engine cooperate with a frame, particularly a motorcycle underframe, to form a supporting unit. The internal combustion engine is secured to the underframe by holding members which cooperate with both the cylinder head and the crankcase housing. The cylinder head is disposed in a median plane of the cylinder and a support core is provided inside the cylinder head. This core is used as the point of attachment tie of the cylinder head. The support core is also continued in the crankcase housing. The support core and attachment tie are connected to one another by the interposition of bolts to provide an advantageous rigid engine mounting system.

Abstract: A V-type multi-cylinder internal combustion engine has a horizontal joint plane between the cylinder block and the intake manifold. Cylinder heads are mounted on the two banks of cylinders and each cylinder head has an inclined surface cooperating with a similar surface on the intake manifold to form fluid tight joints between them. Engine coolant passes through these joints to circulate through a heating water jacket to heat passages in the intake manifold.

Abstract: An improved lubricating system for a two-cycle internal combustion engine having a vertically disposed crankshaft. In accordance with an embodiment of the invention, the crankshaft has a connecting rod journal that rotates in a crank chamber above which is positioned a lubricant chamber. A lubricant delivery passage extends through the crankshaft from the lubricant chamber and terminates in a connecting rod journal portion formed in the crank chamber.

Abstract: A motorcycle carries a multiple cylinder overhead cam shaft V-type engine whose cylinders are inclined in the plane of longitudinal (forward) movement of the vehicle. One cylinder (preferably the forward cylinder) is laterally offset to the right, and the other is laterally offset to the left. An overhead cam shaft is provided for each cylinder, and is driven by a drive located on the respective cylinder on the outside, in the direction of offset. An ignition plug and its cord are mounted on the opposite side, whereby to be shielded from obstacles by structure associated with the neighboring cylinder.

Abstract: A two-cycle internal combustion engine includes a crankcase extending from a cylinder and supporting a horizontally extending crankshaft, a piston mounted for reciprocative movement in the cylinder along an axis generally perpendicular to the crankshaft axis, an air and/or fuel inlet on the crankcase including a flange disposed in a first plane extending generally parallel to the crankshaft axis and perpendicular to the piston axis and having a major axis extending transversely of the crankshaft axis, and a manifold having an outlet flange which is disposed in the first plane and has a major axis extending generally parallel to the major axis of the crankcase inlet flange and further having an inlet flange disposed in a second plane extending generally vertically and having a major axis which extends generally horizontally and is angularly related at a substantial angle to the major axis of the crankcase inlet flange.

Abstract: A modular internal combustion engine is provided in which a single crankcase can be adapted to a plurality of different types of engine configurations. The crankcase is open at its top so that each upper side edge of the crankcase forms a mounting flange while a crankshaft is rotatably carried by the crankcase. Block members and adapter members are provided and each includes a mounting flange formed along each longitudinal side. All of the mounting flanges are substantially identical to each other so that any one mounting flange can be detachably secured to another mounting flange. Thus to construct the engine, one mounting flange of either the block or adapter member is attached to one crankcase mounting flange while one mounting flange on the other member is attached to the other crankcase mounting flange. In addition, the remaining mounting flanges on the block and adapter members register with each other and are secured together.

Abstract: To connect two machine elements which are dynamically loaded by means of tension bolts, the bolts are carried through bores in the machine elements which are somewhat wider than the diameter of the bolts to form a cylindrical chamber, leaving a cylindrical gap surrounding the bolt; the chamber is entirely filled with a damping substance, such as a foamed material, or lubricating oil, particularly pressurized lubricating oil or the like. Preferably, the gap is about 2 to 8 percent of the diameter of the tension bolt, has a length at least three times the diameter of the tension bolt, and is located approximately centered between the points of force application on the tension bolt, to dampen transfer of vibrations, but permit slow bending, below the yield point of the bolt, within the chamber.