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 unitary cylinder useful in internal combustion engines having external threads at one end for a connection with the engine; the cylinder providing internal bearing support to an associated piston mounted internally thereof and external bearing support to a cam actuated saddle embracing the cylinder's exterior. Elongated openings in opposing walls of the cylinder accommodate passage of a transverse wrist pin connection between the internal piston and external saddle.

Abstract: A power transfer mechanism for transferring power between rotating components and reciprocating components includes a cam rotatable about an axis and having an odd number of lobes evenly spaced therearound, and a double acting reciprocating member which includes two diametrically opposed pistons, each of which is connected rigidly to a roller follower in operable relationship with the cam, and connecting means disposed between the pistons for resiliently urging the roller followers against the cam.

Abstract: A lubricant supply system for a two-stroke internal combustion engine, which system includes first and second adjacently located and substantially sealed crankcase chambers which alternately experience high and low pressure conditions which are out of phase with respect to the occurrence thereof, first and second oil supply passages respectively communicating with the first and second crankcase chambers, an oil supply circuit including an oil supply chamber adapted to contain oil and having therein a formation including therein a recess isolated from the oil supply chamber and communicating with the first and second oil supply passages, a metering rod including therein an indentation and supported in the oil supply chamber for movement in the formation between a first position wherein the indentation is located in the oil chamber, thereby affording filling of the indentation with oil, and a second position wherein the indentation is located in the formation in communication with the recess, thereby affording

Abstract: An induction system for a V-type engine that is comprised of a plenum chamber that is disposed within the valley between the cylinder banks but spaced therefrom for cooling purposes. The plenum chamber serves the engine combustion chambers through a plurality of intake pipes that extend from the plenum chamber to the intake ports of the respective cylinder heads. The intake pipes are also spaced from each other so as to accommodate a cooling air flow.

Abstract: The specification relates to an intake manifold having an increased compaction. In this intake manifold, at least one fragile zone is formed parallel to its longitudinal axis in its wall. Crash impact is absorbed and the volume of the intake manifold decreases after crashing, because its cross section is crushed. The intake manifold of this invention has an increased compaction and can prevent the structure around fuel injection valves from breaking.

Abstract: Design Improvements are disclosed which enhance the migrating combustion chamber engine's ability to achieve improved performance, obtain higher durability and cost less to manufacture. These include strip seals between the combustion chamber member and orbiting piston which are adapted to respond to the pressure of combustion to increase contact pressure and improve retention of the gases in the combustion chambers as well as improved porting located in at least one power block sidewall and cooperating with the migrating combustion chamber to convey hot combustion gasses from a combustion chamber to a corresponding secondary expansion chamber. The combustion chamber member may be formed of two reciprocable piston portions and a pair of separate alloy steel connecting bars coupling the piston portions together. The connecting bars made of a low thermal conductivity material to remain hot and aid in fuel evaporation. A one piece counterweight hub provides all required counterweights.

Abstract: An air-inlet assistor for vehicle engines is provided which connects to the engine with an inlet pipe. The air-inlet assistor includes a main body, an upper magnet and a lower magnet contained within the main body, and an air cleaner. The inner cavity of the main body is divided into an upper working chamber and a lower inlet chamber. The upper and lower magnets are disposed within the working chamber with like poles thereof being face to face, to generate a repelling force therebetween. An inverted cone is disposed on the bottom side of the lower magnet to seal an opening formed between the working chamber and the inlet chamber. When the engine is started, a drawing in force generated by vacuum in the engine makes the upper and lower magnets move together to break the seal in the opening formed in a partition board that separates the two chambers.

Abstract: An engine driven generator set includes a vertical shaft engine which rotates a generator rotor and a centrifugal fan mounted above the engine. A plenum collects cooling air blown over generator stator windings by the fan and directs the cooling air through an air duct over the engine cylinder head. Electronic circuitry is cooled by this same cooling air.

Abstract: An internal-combustion engine comprising an intake system has a chamber with an intake connection and individual suction pipes which are connected with a cylinder head and which, by means of valves, lead into the individual cylinders. An air supply and air purification system is connected with the intake connection. An air guiding pipe is connected with the intake connection of the chamber, which air guiding pipe projects freely into the chamber and is arranged coaxially with respect to it. The mouth opening of the air guiding pipe extends in a plane at a right angle with respect to the lateral wall of the chamber and has an identical distance to the center axes of the individual suction pipes of a second and third cylinder of the internal-combustion engine.

Abstract: An improved scavenging control system for a multi-cylinder, V-type, two-cycle crankcase compression internal combustion engine. In each embodiment, a scavenging manifold extends along one side of the crankcase chamber and communicates with the individual sealed sections therein through respective scavenging control passages. A plurality of butterfly-type throttle valves controls the communication between the crankcase chamber and the scavenging manifold and these valves are all affixed on a common valve shaft. In one embodiment, the scavenge control system is disposed in the valley between the cylinder banks and in the other illustrated embodiment, the scavenging system is disposed on one side of the crankcase and outside of the valley between the cylinder banks.

Abstract: An internal combustion engine having a fuel injector (7) arranged for injecting fuel into a combustion chamber, the fuel injector (7) including a nozzle chamber (25) having a selectively openable nozzle (15) at one end to communicate the nozzle chamber (25) with the combustion chamber and including a fuel metering device (14) arranged to selectively deliver fuel to the nozzle chamber (25). There is also provided a gas chamber (10) adjacent the combustion chamber and in communication with the nozzle chamber (25). Preferrably, the gas chamber (10) is located within the cylinder head (1) adjacent the nozzle chamber (25).

Abstract: In a method for introducing fuel into the combustion chamber of an internal combustion engine wherein compressed gas is drawn from the combustion chamber during the compression phase of a working cycle, mixed with fuel, and injected into the combustion chamber together with the fuel during the subsequent working cycle, an ignitible mixture must be provided at the point where ignition is initiated.

Abstract: The present invention relates to a spacing device which is adapted to be interconnected to the intake manifold of an internal combustion engine. This device acts to increase the distance incoming air travels before it enriches the fuel mixture. This increased distance effects higher air velocity and turbulence. This, in turn, creates a more oxygenated fuel supply. The present invention is also described in terms of a kit which enables retrofitting the device upon an existing intake manifold.

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 cooling system and a method for controlling a cooling system for an internal-combustion engine of a motor vehicle having a thermostatic valve which can be switched over from a higher control level to a lower control level. A fan is provided which is assigned to a coolant radiator and which contains a fan control circuit with a temperature comparison step which compares the ACTUAL temperature of the coolant with a desired value. When the desired value is exceeded, a temperature signal is generated which is applied to an input of an AND-element. A switching signal for the switch-over of the thermostatic valve to the lower control level is applied to the other input of the AND-element which forms a switch-on signal for the fan.

Abstract: A pump comprising a pumping chamber (3) for pumping a liquid; at least part of the pumping chamber (3) being formed by a pumping means (6) having a pumping area (A2); an actuation chamber (2) in communication with a source of pressurised fluid, at least part of the, actuation chamber (2) being formed by an actuation means (5) having an actuation area (A1); a connection means (7) connecting the actuation means and the pumping means, so that, at least during those times that liquid is required to be pumped by the pump, variations of the pressure in the actuation chamber effect movement of the actuation means which in-turn effects movement of the pumping means to enable supply of liquid to the pumping chamber and delivery of liquid therefrom; wherein the pressure within the pumping chamber is greater than the pressure within the actuation chamber.

Abstract: An internal combustion engine includes: a cylinder block having a connecting surface formed at a lower portion thereof and a skirt portion extending outwardly from the connecting surface; a crankcase having a connecting surface for contacting the connecting surface of the cylinder block and a bore for inserting the skirt portion therewithin; and, a gasket interposed between the connecting surfaces of the crankcase and the connecting surface of the cylinder block when assembled such that the gasket has a bore formed at the central portion thereof. A pair of detent portions are formed at the outer periphery of the skirt portion with each of the detent portion being different in shape from each other. A pair of recess portions, corresponding to the detent portions, are formed at each of the bores of the crankcase and the gasket.

Abstract: A valve arrangement in an internal combustion engine, into which engine the air-fuel mixture is directly injected by relative pumping elements from a pressure chamber towards at least one cylinder provided with a valve aperture with its relative valve located within a valve body provided with at least one communication channel, between the valve and the valve aperture there being positioned an elastic element which when at rest maintains the valve in its closed position, the valve being inserted into said valve body by way of interposed elements, lockable in their selected position, for adjusting both the preload and its travel.

Abstract: An engine control arrangement including a fuel injector and an engine stop for disabling the running for the engine. In order to facilitate restarting, the fuel injector is permitted to continue to discharge fuel for a time period after the engine stop control is initiated.