Abstract: An apparatus and method are provided for facilitating the cooling of engine coolant flowing through a radiator operatively connected to the engine of an engine-driven, electrical generator set. The engine has a crankshaft rotatable about a first axis and a radiator having a first side directed towards the engine and a second side. The apparatus includes a fan positionable on the second side of the radiator that is rotatable about a second axis generally parallel to and vertically spaced from the first axis. The apparatus includes a thermally responsive clutch having a driven portion. The clutch is movable between a first disengaged position wherein the driven portion is isolated from the crankshaft and a second engaged position wherein the driven portion rotates in unison with the crankshaft in response to a predetermined temperature. A fan drive system interconnects the driven portion of the clutch and the fan for translating rotation of the driven portion to the fan.

Abstract: An engine fastening structure in which a cylinder body and a cylinder head are stacked on and fastened to a crankcase, characterized in that a case side flange portion 3b formed at a crankcase side end portion of the cylinder body 3 is fastened to the crankcase 2 with case bolts 30a, and at least part of head bolts 30c for fastening the cylinder head 4 and the cylinder body 3 together are screwed into the case side flange portion 3b.

Abstract: To miniaturize an engine, to concentrate heavy masses and to reduce friction loss of a balancer. An engine crankcase structure in which a crankcase is vertically partitioned into an upper case and a lower case, each journal supporter is formed in the upper case and in the lower case so that the rotational axis of a crankshaft is located on a partition face of the crankcase in parallel with a direction of the width of the body. The crankshaft is supported so that the crankshaft can be rotated. An oil filter is directly attached to the lower case. An oil cooler and a secondary balancer are arranged in the front of the lower case.

Abstract: This invention relates to a cooling structure for cooling a cylinder liner by circulating coolant in a water jacket formed along an outer periphery of the cylinder liner. This cooling structure includes an annular first water reservoir for temporarily storing coolant. This first water reservoir allows the coolant to uniformly flow circumferentially of the cylinder liner. The cooling structure also includes a plurality of coolant passages provided radially for connecting the first water reservoir to the water jacket. The coolant is caused to strike a part of a wall defining the water jacket substantially vertically from the radial coolant passages, thereby to generate turbulent flow in the coolant to efficiently cool the cylinder liner.

Abstract: A two stroke cycle internal combustion engine machine that does not require lubricating oil to be mixed with its fuel, producing greater efficiency, higher power to weight ratio, cooler operating temperatures, a wider speed range, greater simplicity, and lower toxic emissions, many of the improvements also transferable to four stroke engines.

Abstract: A fuel system for improved fuel efficiency may include a fuel injector to transmit fuel in droplet form to a reaction region. A reaction rod may be positioned in the reaction region, where the reaction rod may have a convex end and a concave end. The fuel system may be used with engines such as gasoline engines, turbine engines, diesel engines, and steam engines.

Abstract: A personal watercraft is disclosed with a hull, a seating assembly, and a four stroke internal combustion engine below the seating assembly. The engine has at least one intake valve for each of the combustion cylinder chambers, at least one exhaust valve for each of the combustion cylinder chambers, and a valve actuation assembly located in a cylinder head for operating the intake and exhaust valves. At least one air intake passageway is operatively coupled to the combustion cylinder chambers through the intake valves. An air intake manifold is connected to the cylinder head and operatively connected to the at least one air intake passageway. The engine also has a supercharger for boosting air to the air intake manifold. The watercraft also includes a propulsion unit, operatively coupled to the crankshaft, which is located on one end of the two ends of the crankcase.

Abstract: An on/off clutch assembly is disclosed having a simplified method for attaching the drive shaft to the hub portion of the drive pulley. The rotating shaft is formed with an integral external threaded portion that is designed to mate with a corresponding internal threaded portion of the hub. The external threaded portion, in conjunction with the internal threaded portion, replace the holes and corresponding cap screws that are used to attach the drive shaft to the hub in current designs. The new design limits the complexity of design and manufacture of the fan drive.

Abstract: A V-type, multicylinder internal combustion engine with multiple isolated crank chambers formed by partitioning a space inside of a crankcase with multiple support walls for supporting a crankshaft, and multiple oil outlet holes, respectively communicating with the isolated crank chambers to separately discharge oil from the multiple isolated crank chambers, uses a single scavenging pump to discharge the oil from the isolated crank chambers rather than connecting multiple scavenging pumps, respectively, to the oil outlet holes. The engine includes an oil collecting pan mounted on a bottom wall of a crank chamber covering the multiple oil outlet holes respectively communicating with the multiple isolated crank chambers for collecting the oil passed through the oil outlet holes. The oil collecting pan has an oil reservoir with an oil outlet opening, and a single scavenging pump for drawing the oil stored in the oil collecting pan through the oil outlet opening.

Abstract: The invention describes a combustion—operated working tool, in particular a setting tool for fastening elements, having a guide cylinder (5) axially displaceable relative to the device housing (1); a piston (9) displaceably mounted in the guide cylinder (6); a housing—integral stop (8), which projects into the guide cylinder (5) to delimit an engagement part of the piston (9) in the direction of advance of the piston (6), when the guide cylinder (5) is shifted in the direction of advance of the piston (6); and an elastic adjusting element (21–23), which is tensioned upon moving the guide cylinder (5) into the device housing (1) and by virtue of which an engagement part (28, 31) can be driven for carrying the piston (9) opposite to the direction of advance of the piston (6), after extension of the guide cylinder (5) out of the device housing (1).

Abstract: To provide a four-cycle combustion engine wherein the air-fuel mixture can be smoothly passed at all times by the utilization of the reciprocating motion of the piston to effectively lubricate the valve operating mechanism and the cranking mechanism and also to allow the air-fuel mixture to be supplied into the combustion chamber with a high suction efficiency. By utilization of the reciprocating motion of the piston (9), a portion of the air-fuel mixture (M) fed from the intake passage (33) is circulated through a circulating passage made up of the valve chamber (18), the first passage (24), the crankcase chamber (7) and the second passage (41).

Abstract: A water pump assembly for controlling the flow of temperature control fluid in an internal combustion engine. The water pump assembly includes a housing with an inlet, an outlet and an electric motor assembly for causing fluid to flow from the inlet to the outlet. A housing includes a mounting flange for mounting the water pump to an engine. The mounting of the water pump permitting direct flow into or out of the engine from the water pump.

Abstract: A generator having a plastic frame. The frame includes plastic panels surrounding the engine and alternator assembly for the generator, providing an enclosure for the engine and alternator assembly and permitting additional features to be added to the frame without adding additional pieces. A retractable cord wrap folds into and out of recesses in one or more panels of the generator. An oil drain chute is provided in one portion of the frame. A retractable handle is extendable from a first recessed position in which the handle is substantially contained within the frame for the generator to an extended position in which the handle extends outward from the frame. A fuel gauge extends along the outer portion of a fuel tank and is formed from a translucent tube.

Abstract: A lubricating structure for engines, wherein an oil feed pump and an oil recovery pump are disposed so as to avoid interference between the oil feed and recovery pumps and a clutch mechanism and an increase in the size of the engine. The clutch mechanism 38 is disposed at a location toward a left end of a crankshaft 7 as an output shaft 7a, which is rotatably supported between an upper crankcase 5 and a lower crankcase 6, that is, disposed on a left side of an engine room. A magnet cover 60 is fixed to right side parts of the two crankcases 5, 6. A magnet MG is disposed between the two crankcases 5, 6 and the magnet cover 60 at a location toward a right end 7b of the crankshaft 7. An oil pump FEP for feeding lubricating oil is disposed between the two crankcases 5, 6 and the magnet cover 60, and an oil pump SCP for recovering lubricating oil is disposed between the two crankcases 5, 6 and the magnet cover 60.

Abstract: An internal combustion engine system comprises: a dehydrogenation reactor which performs a dehydrogenation reaction to separate organic hydride-contained fuel into hydrogen and dehydrogenated fuel; supply means which supplies separated hydrogen and dehydrogenated fuel individually to the internal combustion engine; and control means which switches the operation of the internal combustion engine between a first mode in which both hydrogen and dehydrogenated fuel are supplied to the internal combustion engine and a second mode in which only hydrogen is supplied to the internal combustion engine.

Abstract: The present invention discloses a device for production of hydrogen from effluents of internal combustion engine, which comprises a steam generator, which derives thermal energy from the internal combustion engine and generates steam, the steam and the exhaust of the internal combustion engine being mixed in a reformer reactor and hydrogen gas being extracted through hydrogen separation membrane.

Abstract: A lubricating structure for an engine includes a crankcase for supporting a crankshaft formed from a pair of case halves coupled to each other along a mating plane extending along a plane perpendicular to an axial line of the crankshaft. An oil reservoir in a lower portion of the crankcase extends across the mating plane. A pump chamber of an oil pump is formed between the two case halves across the mating plane. Lubricant is drawn from the oil reservoir into the oil pump using a structure which can achieve reduction of the number of parts and improve the ease of assembly. The structure includes a path groove, which forms an oil suction path for interconnecting the oil pump and the oil reservoir, formed in at least one of the two case halves.

Abstract: A solenoid driver generates a current signal to drive a solenoid of a lifter oil manifold assembly (LOMA) to switch a displacement on demand engine between activated and deactivated modes. The solenoid driver includes a current module that generates the current signal based on a duty cycle signal and a switching module that regulates the duty cycle signal based on the activated and deactivated modes. The duty cycle signal is 100% for a first period after the engine switches to the deactivated mode and is variable for a second period after the first period.

Abstract: The invention is an improved power transmission drive, for an internal combustion engine. The drive is of the type having a flexible link medium for transmitting power between a crankshaft of said internal combustion engine and drive components not associated with a primary purpose of the internal combustion engine. The drive is improved by the inclusion of a drive frame, a camshaft sprocket releasably mounted upon the drive frame, a crankshaft drive-wheel releasably mounted upon the drive frame, an engine accessory mounted upon the drive frame, an accessory drive-wheel mounted upon a shaft of the engine accessory, and the camshaft sprocket, the crankshaft drive-wheel, and the accessory drive-wheel each entrained by the flexible link medium.

Abstract: The present invention provides a reduced emission, single cylinder engine incorporating an air flow arrangement for improving flow efficiency of the intake air drawn into the engine and the exhaust discharged from the engine.