Abstract: In a device for mounting an implement on a tractor wherein a body of the tractor is provided with an upwardly and downwardly movable hitch to which the implement is adapted to releasably mounted, a drive shaft associated to the hitch and drivingly connected to a PTO shaft of the tractor is supported by the hitch and is operable to transmit a power to an input shaft of the implement through shaft coupling means. The hitch is provided with an upper engagement hook opened upwardly and a lower engagement hook opened toward the implement to be engaged with the implement. The shaft coupling means includes a self-aligning mechanism.

Abstract: An internal combustion engine having a main combustion chamber in a top portion of a piston, and an ignition chamber which is provided with a fuel injection valve and an ignition plug, in a cylinder head, the direction in which fuel is ejected from the fuel injection valve being set in accordance with the forward direction of a swirl, the axis of the ejected fuel being spaced from a central portion of the main combustion chamber by a distance of not more than 1/2 of the radius thereof, a recess in communication with the main combustion chamber being provided in the section of the top portion of the piston which is on an extension of the ignition chamber.

Abstract: In a double-lever type governor for fuel injection pump providing a governor lever and a tension lever, and securing a start fuel increment stroke in the governor lever by the help of a start spring; a governor for fuel injection pump providing a locking mechanism which connects said both levers at the time when the start fuel increment stroke of the governor lever becomes zero or approximately zero to be eliminated.

Abstract: The disclosure describes a structure of a main combustion chamber of a diesel engine of a direct injection type in which a main combustion chamber having a peripheral wall which includes a plurality of collision walls and guide walls which are disposed alternately to each other in a circumferential direction of the piston, characterized in that; each guide wall includes an upstream portion and a downstream portion with a boundary therebetween in the direction of the swirl, a radial distance from the center of the chamber to the boundary is shorter than a radial distance from the center of the chamber to other portions and each upstream portion has a longer radius of a curvature and a circumferential length than each downstream portion so that the inner periphery of the chamber has a pin-wheel-like shape.

Abstract: This invention relates to an encased engine generator having an air-cooled engine and a generator housed in a case approximately structured in a rectangular parallelepiped, wherein a fuel tank is provided along the upper surface of the case, an engine having a cooling fan at its side is disposed within the case beneath said fuel tank, a generator interlocked with said engine is disposed at the downstream side of the cooling air from said cooling fan, a silencer is disposed between said fuel tank and generator so that its outer circumference may be cooled by part of said cooling air, and operating parts such as engine operation knob necessary for operation and maintenance are provided on the wall of the case which encloses the remaining cooling air.

Abstract: An outdoor unit of an air conditioner of an engine heat pump type comprises an engine; first and second compressors driven by the engine and having substantially same capacity and heat exchangers for the compressors, said heat exchanger for the first compressor being adapted to utilize an atmosphere as a heat source in a heating operation, said heat exchanger for the second compressor being adapted to utilize a waste heat of the engine as a heat source in the heating operation, a rotation speed of the second compressor being set smaller than that of the first compressor in the heating operation, only the second compressor is adapted to operate in a defrosting operation for the heating operation while utilizing the waste heat of the engine as the heat source, said compressors being adapted to operate in a cooling operation and a rotation speed of the engine and a number of the compressors to be operated being controlled so as to control a cooling capacity in the cooling operation.

Abstract: A gas valve driving apparatus of a gas engine in which a gas supply passage is connected to an intake means of the engine, comprises a gas valve arranged in the gas supply passage; a gas valve cam provided on a cam shaft in a cam chamber formed by a cylinder block of the engine and being independent of an intake cam and an exhaust cam on the cam shaft; and connecting means operable to connect the gas valve cam and the gas valve together, so that the gas valve cam may drive the gas valve through the connecting means. The connecting means may be provided with a rocker arm or may be provided with a tappet. The tappet and the gas valve are aligned on a same line extending toward the center of the cam shaft.

Abstract: A gas-diesel dual fuel engine operative with both a gaseous fuel and a diesel fuel oil. The engine has an electronic governor circuit adapted to receive both a speed signal representing actual speed of engine and a set speed signal representing a predetermined command speed of the engine, electric actuators adapted to actuate a diesel fuel injection pump and a gaseous fuel regulating valve, respectively, in response to the signal from the electronic governor circuit, and a mode switching control circuit connected to the electronic governor circuit and adapted to switch the operation of the electric actuators between a diesel fuel operation mode and a gaseous fuel operation mode.

Abstract: A gas-diesel dual fuel engine operative with both a gaseous fuel and a diesel fuel oil. The engine has an electronic governor circuit adapted to receive both a speed signal representing actual speed of engine and a set speed signal representing a predetermined command speed of the engine, electric actuators adapted to actuate a diesel fuel injection pump and a gaseous fuel regulating valve, respectively, in response to the signal from the electronic governor circuit, and a mode switching control circuit connected to the electronic governor circuit and adapted to switch the operation of the electric actuators between a diesel fuel operation mode and a gaseous fuel operation mode.

Abstract: A unit fuel injector for internal combustion engines having a fuel injecting pump portion and a fuel injection valve portion which are assembled as a unit in a single injector body (6). The injector body (6) has an upper section into which a check valve (9), barrel (5), plunger (3), and so forth are inserted from the upper side of the injector body. The check valve, barrel, plunger and so forth are secured by means of a barrel holder (7) screwed into the upper section of the injector body. Also a nozzle spring (13), nozzle body (19), nozzle valve (18) and so forth are assembled and placed within from the lower side of the injector body. The nozzle spring, nozzle body, nozzle valve and so forth are fixed by a nozzle nut (20) screwed to the lower section. This arrangement permits the diameter of the unit fuel injector to be reduced to facilitate the mounting in the limited space on a cylinder head of the engine.

Abstract: Disclosed is a fuel injection quantity controlling device for diesel engines having a vertically extending crankshaft. The device has a control rod disposed in parallel with the crankshaft. In the event of a failure in the mechanism for vertically and reciprocatingly driving the control rod, e.g. a lever, link or the like, the control rod moves downward by the force of gravity to automatically stop the fuel supply to the unit injectors.

Abstract: A water-cooled diesel engine suitable for use as a marine outboard engine, which has a cylinder head and a cylinder block formed as an integral unit from aluminum or an aluminum-base light-weight alloy. A cooling water jacket, intake ports and exhaust ports are formed in the cylinder head and the cylinder block.

Abstract: The disclosure describes a cone clutch comprising an axially unslidable rotation shaft; a cone body connected to the rotation shaft through a helical spline, adapted to be axially shifted by a shifter or the like, and provided at the outer periphery with a pair of conical faces for frictional engagement; a pair of cone cups disposed at both sides of the cone body, carried rotatably and axially slidably on the rotation shaft, and provided with a pair of conical faces operable to frictionally engage with the faces of the cone body respectively; rotation force transmitting mechanism for transmitting rotation forces in respectively opposite directions to the cone cups; and spring mechanism disposed between the rear sides of the cone cups for forcing the rear faces of the cone cups toward the cone body, respectively.

Abstract: A valve arm chamber apparatus for a diesel engine having, on a cam shaft mounted above intake and exhaust valves thereof, fuel cams for rocking fuel valve arms for driving unit injectors mounted in a cylinder head and intake and exhaust valve cams for rocking intake and exhaust valve arms for opening and closing the intake and exhaust valves, which apparatus comprises a valve arm chamber member which supports the cam shaft, a fuel valve arm shaft for supporting the fuel valve arms, and intake and exhaust valve arm shafts for supporting the intake and exhaust valve arms.

Abstract: A governor for an internal combustion engine, in which a floating lever rotatably supported by a shaft abuts with its one end against the forward end of the governor spindle, the other end of the floating lever being connected through a link member to a control rod for controlling the fuel injection of the engine, and in which a regulator handle is provided, which is operatively connected to the shaft of a grip of a steering handle.

Abstract: A unit injector is disposed on a cylinder head in an oblique state and rocker arms for actuating intake and exhaust valves, respectively, are disposed on both sides of the unit injector. Another rocker arm for actuating the unit injector is disposed between these two rocker arms. Support beds for supporting a rocker arm shaft that supports both rocker arms for actuating the intake and exhaust valves and another rocker arm shaft that supports the rocker arm for actuating the unit injector are formed as a unitary structure. One cam shaft for operating the rocker arms for actuating the intake and exhaust valves and the rocker arm for actuating the unit injector is disposed at a low position on the side of the unit injector as close as possible to the axis of a piston.

Abstract: Disclosed is an air cooled internal combustion engine which comprises a cooling fan formed unitarily on a flywheel fixed to one end of an engine crank shaft, a cooling fan case covering the cooling fan and adapted to guide the flow of cooling air generated by the cooling fan toward the engine body, an air cleaner connected to the suction port of the engine, and a silencer connected to the exhaust port of the engine, wherein the suction port is located at the same side of the engine body as the flywheel while the other exhaust port is located at the opposite side of the engine body to the flywheel, and wherein the air cleaner is formed integrally with the cooling fan case.

Abstract: A fuel injection pump for internal combustion engines of the type having a plunger adapted to be reciprocatingly moved within a barrel to pressurize and deliver a fuel before the establishment of communication between a fuel relief bore formed in the wall of said barrel and a fuel pressurizing chamber, said plunger being adapted to be rotated relatively to said barrel to change the timing of establishment of said communication thereby to adjust the amount of the fuel delivered per stroke of said plunger.Said fuel injection pump is provided with a plunger rotating member coupled to said plunger for rotation therewith.Whereby said plunger can be rotated by merely rotating said plunger rotating member.

Abstract: An antechamber system Diesel engine including an antechamber consisting of a front chamber and a rear chamber and a communication port communicating said antechamber with a main combustion chamber wherein at least one of fuel injection ports of a fuel injection nozzle sprays the fuel in the direction of the communication port. The rear chamber is formed integrally with a cylinder head inside the same while the front chamber is formed on a sleeve member detachably fitted to the cylinder head. If desired, a short axis column-like cavity is defined between the front chamber and the rear chamber.

Abstract: Disclosed is a fuel for a diesel engine which comprises a mixture of (A) an alcohol, (B) gas oil and (C) castor oil, wherein the contents of the respective components satisfy requirements represented by the following formulae:0% by volume <A.ltoreq.80% by volume,10% by volume .ltoreq.B<50% by volume, and10% by volume .ltoreq.C<50% by volume.