Abstract: It is possible to adjust electromagnetic energy introduced from a low-voltage side of a primary winding 20 of an ignition coil 2 after start discharging to a spark plug 1 from the ignition coil 2 in the correct proportion by threshold-determining either one or both of a primary voltage V1 applied to a primary side of the ignition coil 2 and a secondary current I2 flowing in a secondary side of the ignition coil 2, and by opening and closing a discharging switch 32 disposed between an auxiliary power supply 3 including an energy storage coil 330 and a low-voltage side terminal 201 of the ignition coil 2.

Abstract: A braking device includes a flywheel rotatably mounted on a brace, a circular rotor deposited on the flywheel, and a stator fixed to the brace for combining with the rotor. The stator includes first and second magnetic poles. The first magnetic pole is larger than the second magnetic pole. The first and second magnetic poles are arranged into a ring in an interlaced manner. Each of the first and second magnetic poles has a coil. The braking device has a magnetic control unit mounted on a lateral of the brace near a rim of the flywheel and configured to generate magnetism in response to electric currents generated by the coils, so as to change a rotatory load of the flywheel. With the interlaced arrangement of the large and small magnetic poles, the braking device can have the rotor rotating with less cogging torque, and in turn reduced noise.

Abstract: A first voltage signal and a second voltage signal each with positive and negative half waves are generated for rotation direction detection during the operation of an ignition device for an internal combustion engine by a rotating magnet wheel in at least two coil arrangements, which are arranged on adjacent core legs of an iron core, whereby the rotation direction of the magnet wheel is determined from a time offset or angular offset of at least one half wave of the first voltage signal relative to a half wave of the second voltage signal.

Abstract: A system and method are provided for controlling an electric motor driven lubrication supply pump that is supplied with electrical power from a power bus, and that supplies lubricant to a rotating machine that is at least part of a vehicle subsystem. A determination is made that the subsystem is being started-up. Moreover, one or more lubricant parameters, power bus electrical state, and one or more lubricant load states are determined. The electrical power supplied from the power bus to the electric motor is varied, based on the one or more lubricant parameters, the power bus electrical state, and the one or more lubricant load states.

Abstract: A no-contact ignition control device includes a stop switch which maintains a second switching element at the OFF state so that an induced voltage of a trigger coil triggers a first switching element and shortcircuit a generation coil. A surge absorption element is connected in parallel to the stop switch. This configuration prevents intrusion of a surge current into the ignition control circuit caused by static electricity accumulated on the surface of casing covering electronic parts of the ignition control circuit and surely avoid dielectric breakdown of the electronic parts or malfunction of the circuit by the surge current.

Abstract: An electrical ignition method for a combustion engine employing the use of an arrangement of several coils and a magnet wheel or magnet generator which rotates synchronously with the combustion engine, wherein the magnetic field of the magnet generator intermittently flows through the coils and therein generates a sequence of magnetic flux changes per revolution, whereby a sequence of corresponding alternating voltage half-waves is induced in the coils, which are used for charging an energy storage element. Through the use of a stop and/or switch-off system for the combustion engine, the disclosed method prevents a discharge of the energy storage element during the stopping and coast down procedure of the combustion engine and/or to actuate its charging, so that a charged energy storage element is available for the next start of the combustion engine.

Abstract: A capacitive discharge ignition (CDI) system that can be used with a variety of light-duty internal combustion engines, including those typically employed by lawn, garden, and other outdoor equipment. According to one embodiment, the CDI system includes an ignition module having a first switching device that shorts a charge coil during an initial portion of a charge cycle. Subsequently, the first switching device is turned ‘off’ so that a flyback charging technique charges an ignition capacitor. A second switching device is then used to discharge the ignition capacitor and initiate the combustion process.

Abstract: Electrical ignition method for combustion engines through the use of an arrangement of several coils and a magnet wheel or magnet generator which rotates synchronously with the combustion engine, where the magnetic field of the magnet generator intermittently flows through the coils and therein generates a sequence of magnetic flux changes per revolution, whereby a sequence of corresponding alternating voltage half-waves is induced in the coils, which are used for charging an energy storage element, which is discharged by actuating an ignition switch via the primary coil winding of a pulse transformer for initiating an ignition spark, and for generating the operating voltage or voltage supply for an electronic, analog and/or digital and/or programmable control unit, which is deployed for actuating the ignition switch at an ignition point in dependence of the acquired alternating voltage half-waves and/or from the state of the combustion engine, for example its rotational position or rotational speed, and t

Abstract: An ignition timing circuit is disclosed which provides variable fuel ignition timing as a function of the rotational speed of a small internal combustion engine. A measure of the rotational speed of an engine is generated from the shape of pulses generated by a sensor. A timing delay circuit converts this measure of the rotational engine speed into a fuel ignition trigger signal with a controlled delay relative to the engine's angular position. This trigger signal activates a switching device which in turn delivers energy to the engine's spark plug system. A significant benefit of the disclosed ignition timing circuit is its ability to be enclosed in a package which is size and pin-compatible with standard silicon controlled rectifiers.

Abstract: An electric motor thermally associated with a liquid reservoir of an aircraft engine is selectively operated to generate heat for pre-heating a liquid in a reservoir prior to engine start.

Abstract: A controlled slow down apparatus and method for use in the event that a light-duty combustion engine has entered a state of excessive speeds or auto-ignition. The controlled slow down method is preferably initiated when the engine speed exceeds an activation speed for a predetermined number of engine revolutions. Once initiated, the controlled slow down method uses a combination of ignition timing and spark ratio manipulations in order to disrupt the auto-ignition conditions and slow down the engine in a controlled manner. Preferably, the controlled slow down method is only one part of an overall ignition control method, and can be incorporated within or utilized by one of a number of different ignition timing methods known in the art.

Abstract: A capacitor discharge ignition device for an internal combustion engine including an ignition capacitor that is charged with a positive half cycle of an output voltage of an exciter coil, a thyristor that is triggered by a negative half cycle of an output voltage of the exciter coil when the internal combustion engine is ignited to discharge charges stored in the ignition capacitor through a primary coil of an ignition coil, and a reverse bias circuit that applies a reverse bias voltage between a gate and a cathode of the thyristor when a current flowing from the exciter coil through the thyristor is detected and when a charging current of the ignition capacitor is detected.

Abstract: An exciter circuit for firing one or more igniter plugs in an aircraft ignition system. The exciter circuit includes an input node capable of receiving an alternating-current (AC) voltage with a variable frequency and amplitude, a pair of tank capacitors used as energy storage devices, a charging circuit for charging the tank capacitors, a discharge circuit for providing spark energy from the capacitors to two igniters, and a spark gap to initiate the discharge once the capacitors have been charged to a sufficient voltage. The charging circuit includes a step-up ferro-resonant transformer network and a full-wave rectifier. The transformer network includes a saturating transformer, a choke coil in series with the transformer primary, and one or more tuning capacitors connected to a center tap on the primary.

Abstract: In an engine ignition system that includes a rotor that rotates in synchronism with rotation of an engine, an iron core fixedly disposed opposite the outer periphery of the rotor, and a primary coil and a secondary coil that are wound concentrically around the iron core, to reduce the weight of the rotor while allowing the rotational balance of the rotor to be easily adjusted, simplify the arrangement of the rotor itself, and secure an effectively usable space in the region on the inside of the rotor in the radial direction. Permanent magnets are fitted to the iron core having a plurality of legs opposite the outer periphery of the rotor at positions that are spaced in the peripheral direction of the rotor, and an inductor is fixed to the outer periphery of the rotor. The inductor forms a magnetic path for the magnetic flux that is formed by the permanent magnets between pairs of legs.

Abstract: A CDI ignition coil unit integrally formed of an exciter coil, pickup coil and control unit is arranged over the upper side of the engine case, at a position on the cylinder head side in proximity to the periphery of the flywheel while an ignition cord is provided to connect a spark plug located at the cylinder head to the CDI ignition coil unit.

Abstract: A capacitor discharge type ignition system for an internal combustion engine has a secondary charge coil mounted on a ferromagnetic core adjacent to a primary charge coil and an ignition coil, and means for selectively providing current from a battery to the secondary charge coil to increase the charging of a capacitor with the fly back voltage of the secondary charge coil when the current supplied to it from the battery is interrupted or terminated to increase the charge stored by the capacitor at low engine speeds and thereby facilitate starting an engine at very low engine speeds. The battery provides additional energy necessary to provide ignition and starting of the engine at very low engine speeds and can also be used to provide power for other functions, such as to electric starting of the engine, or to power other auxiliary features of the machine powered by the engine.

Abstract: An improved capacitive discharge ignition apparatus provides spark advance with engine speed. The ignition apparatus includes at least one trigger circuit including a trigger coil preferably contained in a common housing with other circuit elements. In this case, an auxiliary coil may be provided to cancel certain pulses in the trigger coil output that could otherwise interfere with desired operation. In some embodiments, a second trigger circuit is provided to derive a triggering signal from the primary coil of the ignition's step-up transformer. A triggering signal of appropriate magnitude received from either trigger circuit will cause discharge of an energy storage element through the primary coil.

Abstract: An ignition system for an internal combustion engine having a magnetically conducting core with at least three legs and supporting a charging winding and a triggering winding. A flywheel, having at least one magnetic field generating member, cooperates with a magnetically conducting core to cause, when passing, voltages to be induced in the windings. An electronic switch is adapted to trigger, in response to a trigger pulse generated by the triggering winding, the discharge of a first capacitor which has been charged by voltage generated in the charging winding, via the primary of an ignition coil, a secondary of which comprises a spark plug. The triggering winding is wound about two of the legs on the magnetically conducting core whereas a third leg supports the charging winding.

Abstract: Ignition system for an internal-combustion engine, in particular for use in a chain saw or the like, comprising a magnetically conducting core supporting a charging winding and a triggering winding, a flywheel having at least one magnetic field generating member and adapted to cooperate with the magnetically conducting core to cause, when passing, voltages to be induced in the windings, and an electronic switch means adapted to trigger, in response to a trigger pulse generated by the triggering winding, the discharge of a capacitor, which has been charged by a voltage generated in the charging winding, via the primary of an ignition coil the secondary of which comprises a spark plug.

Abstract: An improved capacitive discharge ignition system utilizes a permanent magnet assembly revolving in synchronism with operation of an internal combustion engine to generate spark energy. The relatively high voltage necessary to initiate an ignition spark is produced by application of a capacitive discharge voltage to the primary coil of a step-up transformer. The ignition spark is initiated in timed relationship when a voltage otherwise induced on the secondary coil of the step-up transformer by revolution of the magnet assembly exceeds a characteristic spark sustaining potential. Longer spark duration at lower engine speeds is provided by configuring the discharge circuit such that no more than a negligible current flows in the charge coil during the time in which the sustaining potential is being utilized to maintain the spark. In some exemplary constructions, the discharge voltage may be triggered by a voltage divider network electrically connected across the primary coil.

Abstract: The invention relates to a generator arrangement, in particular, ignition systems for internal combustion engines. The arrangement comprises a multi-legged core of magnetically conducting material with the legs radially projecting towards a cooperating magneto flywheel, which exhibits a section with unsymmetrical magnetic flux. The legs carry uniformly wound windings and are connected in two groups in the case of a one-cylinder internal combustion engine. The one group comprises two windings interconnected such that they only deliver an induced voltage when passed by the unsymmetrical section. The other group delivers an induced sum voltage. The voltage of the first mentioned group controls the ignition process whereas the second group charges a capacitor, component of the ignition system.

Abstract: Capacitor ignition systems for internal combustion engines in which a charging winding forms part of an ignition coil and a primary winding is connected in circuit with the charging winding to contribute to capacitor charging. In one embodiment, the secondary winding is also connected in circuit with the charging winding which contributes to development of an output voltage. Circuit components are provided for insuring a high output voltage while protecting a charging diode against excessive inverse voltage during ignition and for protecting the gate of a thyristor switch from an excessive negative voltage.

Abstract: To reduce spurious sparks, and then misfire of an ICE having a magneto with an E armature, upon approach of a magnet (23) in a pole wheel (13) to the leading leg (26) of the E core at high speed ranges of the ICE, the magnetic reluctance of the magnetic path which includes the leading legs (26, 26a) of the E core (14, 14a) is increased with respect to that of the magnetic path which includes the trailing core (25), so that the inductivity of the magnetic circuit including the leading leg is decreased. This can be achieved by providing a wider air gap (X) at the leading leg (26) than at the center leg (15) and the trailing leg (25) of the E core; or reducing the cross-sectional area, or effective magnetic cross-sectional area, e.g. by reducing the number of laminations of the core, at the leading leg or reducing the size of the pole shoe surface (27) facing an air gap which is the same for all legs. A uniform air gap facilitates assembly of the E core.

Abstract: The invention is directed to an ignition arrangement for an internal combustion engine of a handheld portable tool such as a chain saw or the like. The engine has a crankshaft and a fan wheel is seated on the crankshaft for rotation therewith. The ignition arrangement includes a permanent magnet. The magnet has two pole shoes and an exciter coil is mounted on the permanent magnet. The permanent magnet equipped in this way is fixedly mounted on the tool to save weight. A relatively light self-supporting annular member with projections is mounted in the fan wheel. The projections of the annular member and the permanent magnet with its pole shoes conjointly define a magnetic circuit. As the projections pass the pole shoes at a minimal spacing therefrom during operation of the engine, the projections alternately open and close the magnetic circuit thereby causing changes in the flux of this circuit.

Abstract: A ignition module for an ignition system originally fitted with mechanical breaker points. The module comprising a drive winding adapted to be circumferentially received about one of the legs of a core for generating a first induced voltage signal in response to engine rotation. The module further comprising a control circuit extending from the drive winding and positioned between a core leg and an ignition coil.

Abstract: A magneto generator for a motorcycle engine having a flywheel, in which a plurality of magnets are circumferentially arranged at equal intervals, a certain number of adjacent magnets have the same polarity at their inner surfaces, and N- and S-pole alternately appear at the inner surfaces of the remaining magnets. A stator arranged within the flywheel includes one large pole core and a plurality of small pole cores, each of which extends radially outwardly to face to the inner surfaces of the magnets at their T-shaped pole pieces formed at their forward ends. A capacitor charging coil is wound on the large pole core so that a single pair of positive and negative halfwave voltages are generated at the coil to perform a single spark ignition for each revolution of the magneto generator.

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 capacitive discharge magneto ignition system comprising a magneto (10) for generating an ignition spark through a plurality of ignition coils (66,68). The magneto (10) supports a plurality of coils (40,42) on its center pole (20) or leg and a separate pulse suppression coil (46) situated between two of its poles (20,22) or legs. The system includes control circuitry (200) interposing the magneto (10) and ignition coils (66,68) for varying ignition spark timing (206), limiting the maximum speed of engine rotation (208) and for preventing reverse engine rotation.

Abstract: A contactless ignition device for internal combustion engines comprising an exciter coil and pulser coil inducing voltages of phases reverse to each other with the rotation of the internal combustion engine, a first capacitor and second capacitor charged with voltages induced by the respective coils and switching elements connected in series in a circuit connecting the first capacitor with an ignition coil so as to conduct the voltage discharged by the second capacitor when either of both induced voltages reaches a set level. A control circuit controlling the switching time of the switching elements is connected to the switching elements so as to delay the operation of the second switching element with the control circuit in the low speed operation range of the engine and to advance the operation in the high speed operation range. This control circuit includes a switching element operating in response to the voltage inducing state of the exciter coil or pulser coil.

Abstract: Disclosed herein is an internal combustion engine including a mechanism for providing a potential capable of producing a spark when applied to a spark plug, first and second trigger means respectively and selectively operable for applying the potential to the spark plug to produce a spark at a normal timing relative to top dead center and at a retarded timing relative to top dead center, and a switch connected to the first trigger means and operable in response to engine rotation above a given speed for interrupting the operation of the first trigger means so as to change the timing of sparking operation from the normal timing to the retarded timing.

Abstract: A magneto-generator for engine ignition has a cup-shaped pole-wheel with a multiplicity of magnet poles (13) within which is a stationary star-shaped armature having generator windings (20) on the outwardly extending pole legs. A pulse generator (24) is built in with its winding around a core (25) having one end affixed to the armature core (17) between two pole legs (18) and its other end terminating in a pole head (27) that cooperates with a projection (28) of the revolving pole-wheel to enable a control pulse to be generated by a flux derived from the same magnets that serve the generator windings.

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: Our overrun prevention ignition system of the capacitor discharge type includes an ignition angle retarding circuit for retarding the ignition angle by an overlapping period between an ignition signal and a predetermined conduction period of a switching transistor associated with an ignition controlling thyristor. The ignition angle retarding circuit includes an ignition signal generating coil sharing a common core with a magneto and includes a capacitor which is charged by a portion of an ignition signal from the ignition signal generating coil. The capacitor discharges for a certain period upon commencement of the decay of the ignition signal to produce a supplemental ignition signal thereby to effectively lengthen the width of the ignition signal. A switching transistor connected to the gate of the ignition controlling thyristor is maintained conductive for a predetermined period of time irrespective of the engine speed to bypass the ignition signal during this period.

Abstract: Disclosed is an induction or supercharger system (16) for a piston engine (10) having a Roots type blower (14) for supercharging an air-fuel mixture from a carburetor (12) having primary and secondary throttle valves (64) and (66). The induction system defines a naturally aspirated flow path, a recirculation flow path, and a supercharger flow path. The flow paths are controlled by valves (18) and (20). Valves (18, 64 and 66) are moved between their respective opened and closed positions by a linkage mechanism (44) including a lever (72) and linkage assemblies (74) and (76). The linkage assemblies include resilient means (88) and (102) which respectively move the throttle valves open and the valve (18) closed. Valve (20) is opened in response to a differential pressure across the naturally aspirated flow path and the supercharger flow path.

Abstract: Disclosed is an induction or supercharger system (16) for a piston engine (10) having a Roots type blower (14) for supercharging an air-fuel mixture from a carburetor (12) having primary and secondary throttle valves (64) and (66). The induction system defines a naturally aspirated flow path, a recirculation flow path, and a supercharger flow path. The flow paths are controlled by valves (18) and (20). Valves (18, 64 and 66) are moved between their respective opened and closed positions by a linkage mechanism (44) including a lever (72) and linkage assemblies (74) and (76). The linkage assemblies include resilient means (88) and (102) which respectively move the throttle valves open and the valve (18) closed. Valve (20) is opened in response to a differential pressure across the naturally aspirated flow path and the supercharger flow path.

Abstract: In a capacitor discharge ignition system, the feed coil and trigger coil (T) are wound on a common former (26), the trigger coil (T) being located at a position along the supporting pole piece (16b) such as to give a desired degree of spark advance or retardation. Locating the trigger coil close to the engine flywheel (10) or to the base pole piece (16d) has surprisingly been found to give a degree of automatic spark advance or retardation respectively.

Abstract: A breakerless magneto ignition system having a stator assembly including an ignition coil and core. A solid state gate turn-off switch (GTO) is connected by its anode-cathode electrodes in circuit with the primary winding of the ignition coil for conducting primary current. A solid state switching component is connected in circuit with the control electrode or gate of the GTO and with a capacitor which is charged by current generated in the primary winding in one direction as a result of magneto rotation. The stator assembly includes a trigger coil circumferentially spaced from a leg of the core of the ignition coil a distance approximately equal to the edge distance of the magneto to provide a trigger pulse.

Abstract: Disclosed herein is a rotary pulse generator including an armature having a two-magnet assembly including spaced pole pieces defining a pair of spaced gaps, an armature plate including a charge core and charge coil mounted thereon, and a trigger core and trigger coil mounted thereon, said trigger core being separate from said charge core but located in proximity to said charge core so that, at a given armature speed, said trigger coil produces a repeating series of trigger pulses including a first major voltage pulse of one polarity and of a major magnitude closely followed by a second minor voltage pulse of opposite polarity and of a minor magnitude substantially less than the major magnitude, the repeating series of trigger pulses being produced in response to the two-magnet assembly sequentially rotating past the trigger core and the charge core.

Abstract: The invention relates to an apparatus for providing capacitor charging and triggering in so-called electronic ignition systems comprising flywheel magnetos with a plurality of poles. The triggering pulses are arranged phase-shifted in time in relation to the charging pulses, whereby charging the capacitor in question is prevented after triggering initiating ignition. By arranging three windings, for example, connected in series on three adjacent magnetic core legs as capacitor charging pulse generating windings, and bridging over three adjacent ones with a rectifier with a polarity for passing through negative half pulses, a rather constant charging voltage is obtained for a wide range of the engine rpm.

Abstract: This invention provides an improved magneto system which is reliable and stable irrespective of environmental conditions, wear and the like, and has no contacts, breakers or other moving parts in addition to the rotor itself. The conduction in the magneto winding means is initiated and terminated by a solid state device and preferably a solid state threshold device which is responsive to impulses of electrical energy to change its state between one of conduction and nonconduction whereby magneto operation can be controlled by relatively short duration trigger impulses. The trigger impulses may automatically produce a spark advance for increased magneto speeds.

Abstract: A breakerless condenser discharge ignition system for an internal combustion engine and excited by a rotating permanent magnet, consists of a single module, containing a number of windings and electrical components, mounted on one pole of a ferromagnetic core for producing high voltage output pulses for firing an associated spark plug.