Abstract: In an outboard marine engine having a vertically oriented crankshaft, a bracket for supporting an AC generator is provided with a pair of cantilever arms for supporting a pivoted portion and a fixed portion of the AC generator, and a belt cover for the engine is partly supported by extensions of these cantilever arms. The bracket is typically mounted to a portion of the crankcase defining a corner between a vertical end surface and a horizontal top surface. By thus securing the belt cover to the bracket for securing the AC generator, it is possible to firmly support the belt cover and prevent undesirable rattling or vibration of the belt cover because the bracket is given with a sufficient rigidity from the need to firmly support the electric generator. Therefore, the firm support of the belt cover can be accomplished without any substantial cost increase.

Abstract: An outboard motor includes an engine which is tiltable from a first position to a second position, and a drive mechanism connected to the engine for driving a propeller. When the engine is in the second position, the drive means is tilted upward. An auxiliary fuel tank is connected to the engine for storing fuel returning from a fuel injection valve side of the engine. A high-pressure fuel pump is connected to the engine and the auxiliary fuel tank for pumping fuel from the auxiliary fuel tank to the fuel injection valve side of the engine. A water jacket is connected to the auxiliary fuel tank, for cooling the fuel which is stored in the auxiliary fuel tank. A water pump is driven by the engine to supply water from an external water source to an inlet of the water jacket. A first discharge passage is connected to an outlet of the water jacket. An engine cover is provided, which covers the engine, the fuel pump, and the auxiliary fuel tank.

Abstract: An engine includes first exhaust passages formed in a cylinder head, a second exhaust passage formed in a cylinder block and communicating with the first exhaust passages, and a cooling water passage having water jacket portions formed around combustion chambers. The cooling water passage includes a first water jacket and a second water jacket. The cylinder head and the cylinder block are fixedly connected together by bolts. The second exhaust passage opens at a joining surface of the cylinder block along cylinders, which opening is surrounded by the bolts. The cooling water passage has water jacket portions formed between the bolts in the joining surface of the cylinder block such that they surround the opening of the block exhaust passage.

Abstract: A vertical internal combustion engine in which lubricating oil can be cooled efficiently is provided. The engine includes a crankshaft directed in a vertical direction, a lubricating oil pump, an oil filter and a cooling water pump. A lubricating oil passage is arranged along a side wall of a main body of the engine and extends between the lubricating oil pump and the oil filter, a cooling water chamber is formed around the lubricating oil passage, and a branch water passage communicating with the cooling water chamber branches at a discharge side of the cooling water pump from a cooling water passage leading into the main body of the engine.

Abstract: An outboard motor body case supported on a swivel shaft through a connecting member. The swivel shaft is vertically swingable about a tilting shaft. An engine is mounted at an upper portion of the outboard motor body case, with a crankshaft thereof being oriented vertically, and a flywheel is mounted at a lower end of the crankshaft and disposed between an engine block and the connecting member. A dynamo is mounted within the flywheel, and a starter motor is engaged with a ring gear which is formed around an outer periphery of the flywheel. Thus, since the flywheel having a large weight is mounted at the lower end of the crankshaft, the position of the center of gravity of the outboard motor is lowered. Therefore, it is possible to easily perform a tilting-up about the tilting shaft with a small force. Moreover, since the flywheel is mounted on a power taking-off side of the crankshaft, the torsional vibration of the crankshaft can be reduced.

Abstract: A cylinder head is coupled to a cylinder block/cylinder head coupling surface of a cylinder block by ten bolts which are disposed to surround outer peripheries of cylinders. In order to enhance sealability of an opening of an oil passage defined radially outside the bolts as viewed from the cylinders, the cylinder block and the cylinder head are further fastened to each other by two bolts disposed in the vicinity of the opening. Thus, the fastening force of the cylinder block/cylinder head coupling surface can be increased to increase the degree of freedom in design of the opening of the oil passage defined in the coupling surface.

Abstract: An outboard engine includes a cylinder block having a breather passage, an opening provided sideways of and communicating with the breather passage, and a breather chamber disposed at the opening. The breather chamber is provided in a space defined between the cylinder block and an intake manifold positioned laterally of the cylinder block, and communicates with an intake air silencer chamber of the engine via a communication pipe. Making good use of the space, the breather chamber is disposed laterally of the cylinder block in the space, not axially of an engine cylinder as in a conventional arrangement, thereby reducing the axial length of the engine and making the latter compact.

Abstract: The invention provides novel N-substituted dioxothiazolidylbenzamide derivatives that improve the insulin resistance and have potent hypoglycemic effect and lipid-lowering effect, and the process for preparing them, and relates to N-substituted dioxothiazolidylbenzamide derivatives characterized by being represented by a general formula (1) ##STR1## ?wherein R.sup.1 and R.sup.2 denote identically or differently hydrogen atoms, lower alkyl groups with carbon atoms of 1 to 4, lower alkoxy groups with carbon atoms of 1 to 3, lower haloalkyl groups with carbon atoms of 1 to 3, lower haloalkoxy groups with carbon atoms of 1 to 3, halogen atoms or hydroxyl groups, or R.sup.1 and R.sup.2 combine to form a methylenedioxy group, R.sup.3 denotes a hydrogen atom, lower alkoxys group with carbon atoms of 1 to 3, hydroxyl group or halogen atom, R.sup.4 denotes a hydrogen or lower alkyl group with carbon atoms of 1 to 3, n denotes an integer of 0 to 2, and X denotes N or CH!, and process for preparing the same.

Abstract: In a fuel supply system for a multi-cylinder engine, a pump driving cam is provided between an intake cam and an exhaust cam on a camshaft. The pump driving cam and a fuel pump are interconnected by a pump driving member. The pump driving member is slidably supported on a pair of supporting portions which are projectingly, integrally provided on a cylinder head and disposed between valve springs of a pair of intake valves. Thus, the intake valves and the valve springs are prevented from interfering with the pump driving member and the supporting portions and therefore, the fuel pump driven by the camshaft in the multi-cylinder engine can be disposed at a lengthwise intermediate portion of the camshaft. As a result, the distance between the fuel pump and each of the carburetors can be decreased to enable a stable supply of fuel.

Abstract: A flange portion formed on an inner periphery of a flywheel is facet-fitted to an end of a crankshaft. A spline piece is facet-fitted to an inner peripheral surface of the flywheel. The flange portion of the flywheel and a flange portion of the spline piece are commonly fastened to the end of the crankshaft by bolts. An upper end of a driving shaft is spline-fitted at a point into a driving shaft coupled portion of the spline piece which is accommodated in an internal hole in the crankshaft. Thus, in coaxially coupling the flywheel and the driving shaft to the end of the crankshaft, it is possible to make such a coupled area compact and to reduce vibration by an accurate centering thereof.

Abstract: A disclosed engine assembly comprises an engine; a crank shaft having an end extending outward from inside the engine; a rotating body mounted at the end of the crank shaft; a cover body mounted on the engine so as to cover the rotating body; the cover body comprising a lower cover that covers at least lower part of the rotating body and an upper cover connected to the lower cover so as to cover at least upper part of the rotating body; the lower cover having at least one ventilating intake port for sucking hot air located around the engine under the intake port; the upper cover having a ventilating exhaust duct for discharging the sucked hot air; the rotating body including a timing belt located near one side of the engine, a tensioner located near one side of the engine and having a mounting position adjustment bolt for adjusting a tension on the timing belt, and a manually starting pulley located on one side of the engine outside the timing belt; and the starting pulley having at least one opening located

Abstract: A cylinder block of a vertically oriented multicylinder engine includes a cylinder block structure which is configured to support a crankshaft in a vertical orientation. The cylinder block includes a cylinder head mounting surface thereupon, and a plurality of cylinders therein. The plurality of cylinders are configured along horizontal axes. A reinforcing rib or wall is included, with an inclined surface which is inclined with respect to the axes of the cylinders, to ensure that oil which may contact the reinforcing rib flows downward into the crankcase of the engine.

Abstract: Cooling water pumped by a cooling-water pump is passed via a cooling-water supply passage, a cooling-water dispensing chamber, two upper and lower through-holes and a water jacket, a thermo-valve and discharged via a cooling-water discharge passage. When the amount of cooling water supplied from the cooling-water pump is excessive, or when the thermo-valve has been closed, a relief valve mounted in a bypass passage which connects the cooling-water supply passage and the cooling-water discharge passage is opened, thereby permitting the cooling water to be diverted. The bypass passage diverges from the cooling-water supply passage upstream of the cooling-water dispensing chamber. Therefore, even if the relief valve is opened, the flow pattern of the cooling water flowing within the cooling-water dispensing chamber is not influenced, and the flow rates of the cooling water passed through the two through-holes cannot be unbalanced.

Abstract: In an outboard engine, an electric device is attached, utilizing a cooling water passage cover for closing a recessed part constituting part of a cooling water jacket, to the cover via a boss part, thus providing a compact electric device mounting structure with no such parts projecting from a side of an engine as in a conventional box member. An engine starting apparatus of the outboard engine is provided with an ignition device and a starter motor connected to a battery, and an AC generator is connected to the battery via an electric device having voltage restricting and rectifying functions. When it is cranked by the starter motor or a starter pulley, the engine is started by the ignition device operated by the battery. As it is cranked by the starter pulley while the battery is discharging, the ignition device is actuated by a current generated by the AC generator and rectified by the electric device to thereby start the engine.

Abstract: In a vertical engine having a crankshaft directed in a vertical direction and a flywheel provided on a lower end of the crankshaft projected through a bottom wall of a crank chamber, the crank chamber is formed by a skirt section integral with a cylinder block and a split crankcase attached to the skirt section putting respective contacting faces together and an oil dropping hole is formed in a bearing wall section provided on the cylinder block side and forming a lowest crank bearing section within the crank chamber. The oil dropping hole communicates with an lower side of the bearing wall section and an upper side of the bearing wall section positioned within a lowest cylinder and is inclined downward from the cylinder side to the contacting face of the skirt section facing to the split crankcase. A flywheel space is formed under the bottom wall of the crank chamber and an oil pan is provided under the flywheel space.

Abstract: A V-shaped multi-cylinder engine is mounted in such a manner that a crankshaft is mounted in a vertical attitude and cylinders are opened into a V-shape in a rearward direction. An intake silencer is mounted above a throttle body which is disposed in front of a crankcase portion of the engine. The intake silencer includes an intake silencing chamber defined by a belt cover which covers a belt of a valve operating mechanism and by a lower wall member. Two left and right air intake pipes extend downwardly from the intake silencing chamber and open into an engine compartment. A single intake-air introducing pipe extends downwardly from the intake silencing chamber and is connected to an upper end of the throttle body. Thus, it is possible to reduce the intake noise of the engine for an outboard engine system.

Abstract: An upper intake pipe and a lower intake pipe interconnecting a left bank and a throttle body are disposed along a left side of a V-shaped multi-cylinder engine having a vertically placed crankshaft. The lower intake pipe is disposed by utilizing a waste space which is defined between a starter motor and an oil filter, while the oil filter is disposed by utilizing a waste space which is defined between the upper and lower intake pipes. Thus, it is possible to rationally dispose the intake pipes and other auxiliaries on a side of an engine block to reduce the size of the engine for the outboard engine system.

Abstract: A four-cycle engine including a magnetic detection sensor mounted on a non-magnetic cam shaft pulley which is rotated in operative association with a crank pulley for detecting a plurality of detecting portions formed on the magnetic detection member by coils mounted in the cylinder head. The magnetic detection member is integrally formed with the plurality of detection portions for different uses such that distances from the center of rotation of the cam shaft pulley to the plurality of detection portions are different, and wherein the coils are separately mounted in correspondence to the detection portions. Thus, it is possible not only to take out timing signals for different uses from a single cam shaft pulley, but also to eliminate interference between the discrete coils.

Abstract: A camshaft includes a first end journal portion and first, second and third intermediate journal portions respectively. The first end journal portion is supported in a bearing hole in an upper end wall of the cylinder head. The first, second and third intermediate journal portions are supported in three bearing holes in the three intermediate bearing bosses in the cylinder head, respectively. The radii of the four bearing holes and of a camshaft inserting opening in a lower end wall of the cylinder head are in a relationship such that the camshaft inserting opening is the largest radii, and each adjacent bearing hole is progressively smaller in size. The smallest radii bearing hole is for the bearing hole for the first end journal portion. The largest radius of an intake cam and an exhaust cam is smaller than the radii of the intermediate bearing holes. Thus, the camshaft can be smoothly inserted through the camshaft inserting opening and hence, can be easily assembled into the cylinder head.

Abstract: An intake silencer of a vertical-type engine includes two silencing chambers. A first intake silencing chamber is disposed adjacent to the body of the engine; a second intake silencing chamber is located upstream in a flow of intake air from the first intake silencing chamber, and receives the flow of intake air as input thereto. An output of the second intake silencing chamber becomes an input to the first intake silencing chamber. The second intake silencing chamber is disposed at an opposite end of the engine body from the cylinder head of the engine.