Abstract: A diesel engine having cylinders disposed in a V shape is constructed as compact as possible so that it can be adapted to either vertical and horizontal use without changing many parts. To this end, intake and exhaust cams and a fuel injection pump driving cam are disposed on a single camshaft to thereby obviate the necessity of a plurality of camshafts. In addition, a fuel pump, which has conventionally been disposed in a separate fuel injection pump case outside a cylinder block, is disposed inside the cylinder block. Furthermore, a fuel injection nozzle is disposed on an inner side of a pushrod and the pushrod and fuel injection nozzle are disposed between the cylinders, whereby a compact construction is obtained. Moreover, a governor device and a fuel injection pump are disposed on a side opposite to a crankshaft of the camshaft.

Abstract: An internal combustion unit having a cylinder with at least one power piston with thermal means for reciprocating the power piston in the cylinder, the power piston and cylinder defining a combustion chamber, and a generator unit having a linear inductor piston coupled to the power piston for reciprocation together with the power piston and a stationary coil stator constructed in the configuration of an annulus, wherein the inductor piston reciprocates in the annulus of the coil stator and electrical current is generated in the stator.

Abstract: A fuel injection system for an internal combustion engine capable of being normally operated while using an output of a generator driven by the internal combustion engine as a power supply therefor. The system includes a switching circuit for switching a driving current fed to an injector from a main power circuit which uses the output of the generator as a power supply therefor. The switching circuit is controlled by a switch control circuit for which a power supply comprises a control power circuit. The control power circuit includes a storage unit for storing electric power therein, so that the storage unit may be act as a power supply when the output of the main power circuit is reduced, to thereby feed the switch control circuit with a power supply voltage of a level equal to or above an operable level.

Abstract: An engine shut-down device is shown for an engine, having a magneto for generating an a.c. voltage in response to a speed of the engine, an ignition coil provided to ignite the engine, a driver responsive to the a.c. voltage for driving the ignition coil, and generator for generating an engine-stop signal. The device includes a trigger responsive to the engine-stop signal for flowing a forward current from magneto to a ground when the magneto produces a positive value of the a.c. voltage and a backward current for a predetermined period of time from the ground to the magneto when the magneto produces a negative value of the a.c. voltage, an engine-stop section responsive to the backward current for flowing a short-circuit current from ground to the magneto to disoperate the ignition coil, so as to stop the engine.

Abstract: An alternator assembly for an internal combustion engine includes a regulator whose individual circuit components are mounted directly on the stator of the alternator assembly. The regulator may be in the form of discrete components or integrated circuit chips. The components of the regulator circuit may be mounted to the stator by fasteners or by an adhesive resin such as epoxy.

Abstract: The present invention relates to a method for biasing and making conductive an insulated gate semiconductor device having main electrodes at both surfaces of a semiconductor substrate and a gate electrode at one surface. Charges are accumulated between the gate electrode and the main electrode at the opposite surface while a voltage is applied across the electrodes storing a charge. The element is made conductive by discharging the accumulated charges when a voltage is applied in the conductive direction to such semiconductor element. The device can be used to drive the primary side of an ignition system in an internal combustion engine.

Abstract: An alternator assembly for an internal combustion engine includes a regulator whose individual circuit components are mounted directly on the stator of the alternator assembly. The regulator may be in the form of discrete components or integrated circuit chips. The components of the regulator circuit may be mounted to the stator by fasteners or by an adhesive resin such as epoxy.

Abstract: A high efficiency marine alternator system employs a marine engine flywheel as a rotor in an alternator. The rotor has a cup-shaped portion defined by an outer circular wall, and wherein a stator is received within the cup-shaped portion. The rotor is formed of a one-piece net ductile iron casting by the lost foam process. Magnets are mounted on an inner surface of the circular wall such that as the rotor rotates, the magnets move past pole faces of the stator. A starter motor ring gear is mounted on an outer surface of the circular outer wall. By minimizing a thickness of the outer circular wall on which the magnets are directly mounted and by direct mounting of the magnets on an inner surface of the outer wall, for a given diameter of the rotor/flywheel, the rotor magnets can be mounted at a maximum radius from a central rotational axis of the rotor, thus increasing linear velocity of the magnets as they move past the rotor faces, and improving efficiency of the alternator.

Abstract: The ignition system for providing spark ignition to the cylinders of an internal combustion engine includes a generator assembly adapted to be mounted on said engine. This generator assembly includes a magneto adapted to be driven in response to the operation of the engine to provide output power and a timing unit including at least one rotatable unit driven in timing relationship to the operation of said engine. A control assembly is removably mounted on the generator assembly and incorporates an ignition control circuit connected to receive power from the magneto and operative in response to the timing unit to provide spark ignition to specific cylinders of the internal combustion engine. The control assembly is removable from the generator assembly without altering the timing relationship between rotatable unit and engine.

Abstract: A flywheel assembly for a small internal combustion engine including a permanent magnet structure secured to the flywheel near the outer periphery thereof and for cooperating with the ignition stator to induce spark creating voltages therein. The permanent magnet structure includes two pole shoes and a permanent magnet captured between shoulder portions of the pole shoes. A non-magnetic spacer plate includes two protuberances and is inserted between the flywheel and the magnet group consisting of the pole shoes and the permanent magnet. The protuberances cooperate with outer peripheral surfaces of the pole shoes. The magnet group is held accurately and rigidly in position by axially compressing a pair of rivets which pass through the flywheel, the plate and the magnet group, whereby the rivets are radially expanded to tightly fill the respective apertures through which they pass. The protuberances on the plate prevent the pole shoes from pivoting when the pole shoe outer surfaces are machined.

Abstract: 'The invention is concerned with an ignition signal generator for internal combustion engines, consisting of a rotor and stators, wherein the rotor is constituted by a cylindrical magnet magnetized in the axial direction, and two disc-like magnetic pole pieces consisting of N pole and S pole attached to both side surfaces of the cylindrical magnet, the stators are so disposed that the two magnetic pole pieces are sandwiched therebetween, one end of each of the stators being faced to the N pole of the magnetic pole pieces and the other end thereof being faced to the S pole, and a pulser coil is wound on the central portion. Each of the two disc-like magnetic pole pieces is provided with stepped portions consisting of a portion larger than the outer diameter of the cylindrical magnet and a portion smaller than the outer diameter of the cylindrical magnet, the stepped portions in the periphery of the two magnetic pole pieces being coupled by a curve that changes gradually.

Abstract: A scheme for mounting a permanent magnet group on the flywheel of a small internal combustion engine to provide the moving portion of an ignition system for such an engine is disclosed wherein the engine flywheel is formed of cast iron or similar ferromagnetic material and the magnet group is magnetically isolated from that flywheel so as to minimize short circuiting of the magnet group flux. A generally flat region of the flywheel receives a spacer or plate formed from aluminum or a similar substantially non-magnetic material such as zinc with that plate sandwiched between the flywheel and the magnet group by a pair of aluminum or similar non-magnetic material rivets passing through the flywheel plate and magnet group. The magnet group is held accurately and rigidly in position by upsetting the rivets in such a manner as to axially compress and therefore radially expand the rivet material so that the rivets tightly fill the respective apertures through which they pass.

Abstract: A capacitive discharge ignition system wherein the transformer secondary is responsive to changing magnetic flux such that supplemental voltage, of magnitude in excess of the spark sustaining voltage for a relatively long time period, is induced in the secondary coil in timed relation to high voltage damped oscillatory voltages induced by capacitive discharge. The magnetically induced voltage combines with the discharge induced voltage to provide at least one pulse in excess of the spark ionization potential to initiate a spark, and, in cooperation with the secondary coil inductance, thereafter sustains the spark for the duration of the time period despite the remainder of the discharge induced voltages.

Abstract: A magneto for two-cycle engines comprises a rotor provided with a magnet and a pair of poles, and a stationary assembly including a U-shaped iron core having a pair of legs and an ignition coil wound around one of the legs. The magnetic circuit provided by the pair of core legs, the pair of poles and the magnet includes a magnetic path through the other leg which path is given an increased magnetic resistance by a gap portion. The gap portion is formed in the end face or a side face of the other leg or in one of the poles in the end face thereof opposed to the other leg.

Abstract: A magneto rotor assembly is disclosed in which a magnet is clamped in position between a pair of pole pieces within a cavity in a rotor. The pole pieces are provided with at least one tapered surface which engages a or the corresponding tapered surface(s) of the rotor cavity to prevent movement of the pole pieces and magnet. A fastener is also provided to hold each pole piece in engagement with the rotor cavity.

Abstract: An ignition circuit according to the present invention has the properties of trigging, i.e. releasing the spark at a predetermined point behind the top of the primary voltage (the ignition generator voltage). During the ascending primary voltage the ignition switch (12) is conducting while a capacitor voltage (U.sub.K) is developed. When the primary voltage has passed its top value a potential difference to the capacitor voltage (U.sub.K) is created, which is used for the control of the switch to make it break. By the interruption of the primary current an ignition voltage is induced at duty r.p.m. in an ignition coil (11). At an extremely high r.p.m. the ignition is delayed behind the voltage top whereby the induced voltage will be too low for ignition. Too high an r.p.m. is thereby avoided.

Abstract: A bracket for mounting a transistor device and trigger coil of a breakerless ignition system between the induction coil and one of the leg portions of an A-shaped armature core. The bracket includes a hollow housing for receiving the transistor and trigger coil which are secured therein by means of an epoxy potting material. A pair of spaced guide surfaces integrally formed in the housing provide a guideway for slidably receiving the armature leg. A resilient arm member projects from the housing and includes a hooked portion which snaps into a locked position when the bracket is slid onto the armature leg to hold the bracket in place. A pair of resilient, spaced apart wing members also project from the housing to engage the induction coil to prevent vibration of the bracket between the induction coil and armature, and a third resilient wing member projects from one of the guide surfaces to engage the armature leg and prevent vibration of the bracket between the guide surfaces.

Abstract: The ignition coil of an electronic ignition system, wherein a voltage is induced in the coil by way of a magnet wheel, has an auxiliary coil connected to charge a capacitor by way of a diode. The different voltage of the auxiliary coil and capacitor controls the cut-off of current in the ignition coil.

Abstract: A capacitor discharge ignition system is provided in a self-contained hermetically sealed housing having improved component packaging. The capacitor discharge ignition system includes an ignition coil and an auxiliary coil for charging a capacitor of the capacitor discharge ignition system in response to a rotating magnetic field. The auxiliary coil is fabricated with a coil shape factor having a greater height and lower mean turn diameter than conventional auxiliary coils. The lower mean turn diameter of the auxiliary coil provides space within the housing for circuit components of the capacitor discharge ignition system to be placed between the auxiliary coil and the inner wall of the housing. Thus, the circuit components are removed from the conventional location between the primary and secondary windings of the ignition coil.

Abstract: A capacitor discharge ignition system is provided in a self-contained hermetically sealed housing having improved component packaging. The capacitor discharge ignition system includes an ignition coil and an auxiliary coil for charging a capacitor of the capacitor discharge ignition system in response to a rotating magnetic field. The auxiliary coil is fabricated with a coil shape factor having a greater height and lower mean turn diameter than conventional auxiliary coils. The lower mean turn diameter of the auxiliary coil provides space within the housing for circuit components of the capacitor discharge ignition system to be placed between the auxiliary coil and the inner wall of the housing. Thus, the circuit components are removed from the conventional location between the primary and secondary windings of the ignition coil.

Abstract: To prevent reverse-direction operation of an internal combustion (IC) engine to which the ignition system is connected which, possibly, may lead to dangerous conditions if the IC engine is used, for example in a chain saw, lawn mower, or the like, a diode (35) is connected across a second, ignition instant modifying R/C circuit (34, 33) in the control network (29) of the magneto ignition system, which includes a first R/C circuit (30, 31) to provide for immediate conduction of a control transistor (27) and hence blocking of a controlled ignition transistor (21) and disconnection of the ignition system in case of reverse rotation. This system is a further development of the basic ignition system described in U.S. Pat. No. 4,188,929, to which reference is made.

Abstract: The present invention relates to a contactless ignition circuit for internal combustion engines wherein a primary short-circuiting current flowing through the primary winding of an ignition coil is made to flow through a power transistor controlled to be conducted and interrupted by a programable unijunction transistor and a potential dividing type capacitor is connected to the anode electrode so as to operate this programable unijunction transistor when the wave height value of the primary short-circuiting current flowing through the above mentioned primary winding becomes maximum so that a spark plug connected to the secondary winding will be operated to ignite at a high sensitivity.

Abstract: Disclosed herein is an engine ignition system comprising a charge capacitor, first and second ignition coils respectively including first and second primary windings and first and second secondary windings connected respectively to first and second spark plugs, first and second electronic switches respectively including first and second anodes connected respectively to first and second primary windings, first and second cathodes connected to the charge capacitor, and first and second control elements operable, upon application thereto of a trigger current pulse, to cause the first and second switches to be conductive, and which employs rotary pulse generator means including a relatively rotatable magnet and trigger coil for generating trigger voltage pulses in response to engine rotation, the trigger coil having first and second ends respectively connected to the first and second control elements, a first diode having a cathode connected to and between the first end of the trigger coil and the first control e

Abstract: An adapter kit for converting a battery powered motorcycle ignition system to a magneto ignition system comprising a drive mechanism adapted to be mounted in the tachometer drive take-off port of a motorcycle for driving a magneto by the gear provided for driving the motorcycle tachometer.

Abstract: Rotor for a magnetomotive device in the form of an annular casting having a cavity or slot formed in the periphery thereof. The cavity includes locating surfaces. A permanent magnet is held in clamping relation within said cavity between a pair of pole pieces which include arcuate pole faces coaxial with the rotor. Retaining pins disposed in registered recesses of the cavity and pole pieces hold said pole pieces in said slot and urge surface portions thereof radially against said locating surfaces which are oriented to cause the pole pieces to exert clamping forces against the magnet disposed therebetween with the pole faces disposed in coaxial relation in the rotor.

Abstract: A multipolar stator for magneto basically comprises a central cast-aluminum plate to which are rigidly secured the coils, points, and condenser of the ignition and electricity-generating system. Each of these active circuit components has a terminal extending outwardly beyond the periphery of this metallic disk. An insulating semirigid synthetic-resin ring surrounds this metal plate and is provided with connections that can be secured to these terminals so that wiring can lead from the connections out of the ring. Thus the rotor assembly comprises two separate subassemblies, one conductive and one insulating, and allows a parts supplier to stock various standard items to form a multiplicity of different stator types.

Abstract: A device for automatically advancing the ignition timing in an ignition system for an internal combustion engine is disclosed, in which the ignition timing is fixed constant in a low speed range of the rotation of the engine, advanced in an intermediate speed range lower than a predetermined rotary speed, and fixed constant again in a high speed range higher than the predetermined rotary speed. In this automatic ignition timing advancing device, a positive pulse signal generated at a first phase corresponding to the ignition timing in the low speed range, a negative pulse signal generated at a second phase corresponding to the ignition timing in the high speed range, and a positive voltage signal having an amplitude increasing with time in the phase range including the first phase and second phase are combined to provide a composite signal used as a control signal for controlling the ignition timing.

Abstract: A magneto-alternator has a plurality of alternator coils for lighting or the like and a main ignition coil for a breaker-point ignition. Stator laminations are arranged so that the ignition coil is between two alternator coils and each coil is effectively on an E-shaped core with an outer leg of each E-shaped core being shared with an adjacent coil. The flywheel has a plurality of ceramic magnets having a high potential energy so that a high alternator output is developed. The center core leg of the E core on which the ignition coil is mounted has a large air gap relative to the air gaps at the other core legs to compensate for the high energy of the magnets and thereby limit current at the breaker points. The large air gap also makes the magneto output insensitive to production tolerances in the air gap.

Abstract: An electronic ignition control system including one coil assembly having a high number of turns to charge the associated capacitors to a desired level when the speed of the engine is low, and another coil assembly having a low number of turns to charge the capacitors to a desired level when the speed of the engine is high to thereby provide energy at a suitable level to fire the associated spark plugs. The system also includes means for regulating the voltage supplied by the alternator coils to a battery and thus preventing the battery from overcharging; and, means are provided for driving a tachometer proportionally to the firing pulses supplied to the spark plugs.

Abstract: To prevent spurious responses of a semiconductor switching element used in triggered magneto-type semiconductor ignition-switching systems, primarily due to noise signals introduced by the magneto, the control circuit for the ignition system includes a common, parallel connected R/C compensation circuit, connected through decoupling diodes to the ignition trigger pulse sources for the respective cylinders and the grounded main terminal of the switching element to supply a compensating voltage which suppresses noise voltages which increases with increasing speed of the internal combustion engine and thus dynamically compensates for generated noise pulses.

Abstract: This invention relates to a method for preventing premature ignition in an ignition device for the internal combustion engine including a non-contact type ignition circuit for the internal combustion engine, particularly an ignition circuit for the internal combustion engine in which an inductive current in the form of an AC waveform induced in a primary winding of an ignition coil is controlled in its conduction and cut-off by means of a transistor circuit, various auxiliary circuits to be disposed for a desired performance in accordance with the purpose of use and the rate of this circuit, and an ignition circuit for the internal combustion engine in accordance with the present invention, and more particularly to a method for preventing premature ignition in an ignition device for the internal combustion engine comprising a transistor circuit for controlling in conduction and cut-off of a primary short-circuit current in the whole circuit and a trigger circuit for controlling the trigger in said transistor

Abstract: For an internal combustion engine, there is provided an electrical power generator system and an electronic ignition system both disposed under the flywheel casing. Permanent magnet means provide a rotating magnetic field for the generating coils of the generator system and the charging coils of the ignition system, there being a separate trigger magnet for creating a magnetic field for a trigger coil of the ignition system. A shielding plate of ferromagnetic material is fixedly disposed between the permanent magnet means and the trigger magnet to shield the trigger coil magnetically from the field of the permanent magnet means whereby it will respond only to the field from the weaker trigger magnet. Preferably, the shielding plate can be angularly adjusted and supports the trigger coil to enable adjustment of timing.