Abstract: In a water discharge mode (heat storage mode) for discharging low-temperature cooling water from a heat storage tank to a side of a heater core that heats air using cooling water from an engine as a heating source, a cooling water amount discharged from the heat storage tank is made smaller as a necessary heating capacity for heating air becomes larger. For example, as a ratio of an air amount flowing through the heater core becomes larger, the cooling water amount discharged from the heat storage tank becomes smaller. Further, as the temperature of the cooling water flowing into the heater core becomes higher, the cooling water amount discharged from the heat storage tank is increased.

Abstract: An individual ignition type ignition coil device for engine which is directly connected to each spark plug for use, comprises a coil case 6, and a center core 1, a secondary coil 3 wound on a secondary bobbin 2 and a primary coil 5 wound on the primary bobbin 4 each concentrically installed inside the coil case 6 in turn from the inside to the outside. Insulating resin 17, 8 is filled between the interiorly installed structural members. The secondary bobbin is made of material of modified PPO mixed with inorganic matter of 30% or more.

Abstract: An ignition device for a personal watercraft engine, which allows mounting of a four-cycle engine on the personal watercraft and prevents occurrence of leakage of current. The engine for driving a jet propelling pump is provided in a watercraft body surrounded by a hull and a deck. A spark plug for spark ignition is provided in a cylinder head of the engine, and an integral cap ignition coil having a water-proof structure is water-tightly provided in the cylinder head in such a manner as to be located on the spark plug at an uppermost portion of the engine. A water-escape groove continuous to a recess for receiving a cap is formed in an upper surface of the cylinder head. A bottom surface of the escape groove is formed into a shape tilted downwardly.

Abstract: An ignition coil unit to be installed in a hole opened through a cylinder head of an engine having a case, an ignition coil installed in the case and comprising a primary coil connected to a power source and a secondary coil connected to a spark plug which is installed in a combustion chamber of a cylinder of the engine for producing spark discharge to ignite air-fuel mixture to generate combustion thereof in the combustion chamber, and a circuit board on which an ionic-current detection circuit, connected to the secondary coil, which detects ionic-current that flows during the combustion of the air-fuel mixture; and a processing circuit, connected to the ionic-current detection circuit, which generates an output indicative of the detected ionic-current, are formed; In the unit, an igniter is also installed in the case, thereby improving detection accuracy of ionic-current and misfiring.

Abstract: An ignition coil 1 according to the invention is an ignition coil having a case 2 and a coil portion 7 accommodated in the case. The case comprises a base resin whose dielectric breakdown voltage exceeds that of polyphenylene sulfide and whose spiral flow length exceeds that of polybutyrene terephthalate. As the base resin has a high fluidity, there is only a limited risk that a defect such as a weld line is caused when molding a thin case. In addition, while the thickness of the case and the electrical insulation properties are in proportion to each other, the case comprising the base resin can ensure sufficient electrical insulation properties even if the case is formed thin.

Abstract: A method and apparatus for securing at least one ignition coil to an ignition coil cassette, the ignition coil cassette having a main body portion being adapted to receive and engage a plurality of coils for generating a high voltage signal to be received by a spark plug of an internal combustion engine. The coils being ultrasonically welded to the main body portion of the ignition coil cassette. The coils being secured in a manner which correctly positions the coils in an appropriate location as well as providing a rigid securement of the coil to the main body portion.

Abstract: The invention provides an ignition device of a cylindrical shape for an internal combustion engine, in which device it is possible to improves a productivity of a side core and a center core and to improve the efficiency of converting a magnetic flux together with the decreasing of the number of the steps of assembling process. The ignition device comprises a primary coil, a secondary coil, a center core, a side core, all of which are located concentrically in this order from the inside thereof, and a silicon steel strip having a thickness not more than 0.2 mm is used an a material of the side core so that a spirally wound, cylindrical shape is provided. Further, a thin film amorphous silicon steel strip having a flux density B8≧1.4T at a direct current magnetizing force of 800 A/m or a crystallized silicon steel strip having a thickness not more than 0.

Abstract: An ignition apparatus includes a magnetic circuit comprising a central core and a side core or shield, and primary and secondary windings. The shield is allowed to electrically float, thereby reducing the capacitance of the secondary winding. A housing is external to and surrounds the shield to inhibit arcing. A silicone boot overlaps a housing/case interface to further suppress arcing.

Abstract: An ignition coil assembly includes a cylindrical central core having a main axis, a primary winding outwardly of the central core, a secondary winding outwardly of the primary winding, and a case comprising polyimide material. In one embodiment, a secondary winding spool comprises polyimide material. The overall diameter of the ignition coil assembly is reduced relative to conventional designs.

Abstract: A spark ignition assembly for use in a spark ignition system of an internal combustion engine, and an assembly method therefor. The spark ignition assembly includes a housing within which a spark plug, ignition coil and connector are housed. The spark plug has an insulator body, a first electrode and a ground electrode at a first end of the insulator body, and a terminal at an oppositely-disposed second end of the insulator body. The ignition coil is electrically connected to the terminal of the spark plug and to the connector, through which an electric voltage is applied to the ignition coil. The housing preferably contains a liquid injection molding (LIM) compound that surrounds the ignition coil and at least portions of the connector and spark plug.

Abstract: A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending from a mounting bracket (10), a cylindrical protrusion (41) is built on one surface (43) of an earth electrode (40). The protrusion extends toward the center electrode to form a discharge gap (50) between the protrusion and the tip of the center electrode. Both of the tip of the center electrode and the protrusion of the earth electrode are 2.3 [mm] or less in each diameter (D1, D2), thus an amount of energy required for ignition being limited to 17 [mJ] or less.

Abstract: An ignition coil assembly having a coil spring (26) made of electrically conductive material, an electrical coil connected to deliver electrical energy from the ignition coil assembly 11 through the coil spring and a ferromagnetic member (30) disposed within the coil spring. A resistive spark plug (40) is electrically coupled to the coil spring (26). The spark plug and ferromagnetic member (30) form a high pass filter (51) and low pass filter (58) respectively to reduce radio frequency interference.

Abstract: A coil-on-plug ignition system for mounting an ignition coil to a valve cover of a vehicle. The coil-on-plug ignition system includes an ignition coil having a connecting terminal connectable to a spark plug of the vehicle. The system further includes a retaining clip fixedly mounted to the ignition coil. The retaining clip has a mounting portion that includes a slot. The slot is adapted to receive a pin extending from the valve cover for selectively retaining the ignition coil to the valve cover through a twisting connection. A biasing member is further included for biasing the retaining clip in a retaining position. The biasing member is mounted between the retaining clip and the valve cover.

Abstract: A suppressor diode for use in an ignition coil, the suppressor diode provides a diode that prevents “make voltages” from breaking down a spark gap of a spark plug. In addition, the resistive inductor prevents electromagnetic interference from the spark plug. The suppressor diode is configured for securement in a confined area of an ignition coil. In particular, the suppressor diode is located between a high-voltage terminal and a high-voltage end of a secondary coil. The suppressor diode includes a spool with a winding surface, a diode is molded into the spool and the diode has a first end connection and a second end connection. The diode is oriented to prevent current flow from the first end connection to the second end connection. A suppressive winding is disposed on to the winding surface, an end cap electrically connects the first end connection of the diode to the suppressor winding.

Abstract: A magnetically energized ignition system (10, 24) for a small engine includes a rotary magnet system (11, 25) driven by the crank shaft of the engine, a charging coil (12, 26) in which a voltage is induced by the rotating magnet system (11, 25) an energy store (12, 28) which is charged by the charging coil (12, 26), a voltage converter (19, 34) which is connected with the energy store (12, 28) and creates a transformed high ignition voltage, a spark plug (23, 35) connected with the output of the voltage converter (19, 34), a crank shaft position indicator (14, 29), and a switch element (13, 27) controlled by the crank shaft position indicator and which has an effect on the energy store (12, 28), and reduces the disadvantages of known ignition systems, especially saving costs in respect to known ignition systems, especially by making possible the saving of costs in respect to high voltage cabling, the ignition system also being particularly suited to the narrow space requirements of small motors in that the vo

Abstract: A spring assembly having a coil containing a core and methods and apparatus for manufacturing same are disclosed. The coil includes a core between reduced portions of the coil. One device for manufacturing the coil includes a coiling machine having an insert device operable with a coiler. The coiler is programmed to form coils of appropriate diameter along the length of the coil, including a diameter sufficiently large to contain the core and two diameters sufficiently small to retain the core in the coil. The insert device transfers the core to the coil after the first small diameter is formed and before the second small diameter is formed. The coil with the core contained between the two small diameters is thereby manufactured in a unified automated process.

Abstract: An individual ignition type ignition coil device for engine which is directly connected to each spark plug for use, comprises a coil case 6, and a center core 1, a secondary coil 3 wound on a secondary bobbin 2 and a primary coil 5 wound on the primary bobbin 4 each concentrically installed inside the coil case 6 in turn from the inside to the outside. Insulating resin 17, 8 is filled between the interiorly installed structural members. The secondary bobbin is made of material of modified PPO mixed with inorganic matter of 30% or more.

Abstract: A spring assembly having a coil containing a core and methods and apparatus for manufacturing the same are disclosed. The coil includes a core between reduced portions of the coil. One device for manufacturing the coil includes a coiling machine having an insert device operable with a coiler. The coiler is programmed to form coils of appropriate diameter along the length of the coil, including a diameter sufficiently large to contain the core and two diameters sufficiently small to retain the core in the coil. The insert device transfers the core to the coil after the first small diameter is formed and before the second small diameter is formed. The coil with the core contained between the two small diameters is thereby manufactured in a unified automated process.

Abstract: A spring assembly having a coil containing a core and methods and apparatus for manufacturing the same are disclosed. The coil includes a core between reduced portions of the coil. One device for manufacturing the coil includes a coiling machine having an insert device operable with a coiler. The coiler is programmed to form coils of appropriate diameter along the length of the coil, including a diameter sufficiently large to contain the core and two diameters sufficiently small to retain the core in the coil. The insert device transfers the core to the coil after the first small diameter is formed and before the second small diameter is formed. The coil with the core contained between the two small diameters is thereby manufactured in a unified automated process.

Abstract: Object: The present invention is intended to supply an internal combustion engine-use igniter that is compact, excellent in mountability, and can contribute to the simplification and automation of assembly and to cost reduction. Implementing means: An insulated gate bipolar transistor (IGBT) is used as the ignition coil switching device for the internal combustion engine. The IGBT and a current limiting circuit intended to protect it from an overcurrent are formed on single semiconductor chip 3, and this semiconductor chip 3 and radio noise reduction capacitor 5 are contained in single packaging unit 4 having external input and output terminals 41 to 44. Packaging unit 4 is transfer-molded using a material such as epoxy resin.

Abstract: In an independent ignition type ignition coil for an internal combustion engine which is used being directly coupled to a corresponding ignition plug, a center core 1, a secondary coil 3 wound around a secondary coil bobbin 2 and a primary coil 5 wound around a primary coil bobbin 4 are arranged concentrically in a coil casing 6 in this order from the inside thereof and such as epoxy resin 8 and soft epoxy 17 are filled between these constituting members, wherein on the outer surface of the primary coil 5 a cover film which promotes peeling off thereof from the epoxy resin 8 is formed, and because of existence of these peeling off portions between the primary coil 5 and the epoxy resin 8 and between the layers of the primary coil 5, a stress component induced inside the secondary coil bobbin 2 due to heat contraction difference between the primary coil 5 and the secondary coil bobbin 2 among thermal stress induced inside the secondary coil bobbin 2 is reduced.

Abstract: An apparatus for combustion initiation in an internal combustion engine is provided. A capacitive spark plug boot uses the engine cylinder head as an outer capacitor member. The capacitive spark plug boot contains the inner capacitor member and an insulator. The insulator surrounds the inner capacitor member, with an outer surface of the insulator sized to engage a cylinder head cavity surrounding the spark plug. The capacitor stores electrical energy received from a power source, and delivers it to the spark plug upon formation of a spark.

Abstract: To improve an anti-heat shock performance and an electric field concentration relaxation (an insulation performance) between a secondary coil and a center core, to attain a narrow diameter structure in an individual ignition type ignition coil and further to improve an assembling working of the ignition coil. The individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coil 3 is positioned at an inner side of a primary coil 5 and between a secondary bobbin 2 and a center core 1 a soft epoxy resin 17 is filled up. In the secondary bobbin 2, a secondary coil low voltage side is a potting side of the soft epoxy resin 17 and an inclination having a difference in an inner diameter is provided on the inner diameter in which the secondary coil low voltage side is formed large and secondary coil high voltage side is formed small.

Abstract: Ignition coil for internal combustion engines with two or more transformer stages connected in a cascade arrangement one behind another.

Abstract: In an independent ignition type ignition coil for an internal combustion engine which is used being directly coupled to a corresponding ignition plug, a center core 1, a secondary coil 3 wound around a secondary coil bobbin 2 and a primary coil 5 wound around a primary coil bobbin 4 are arranged concentrically in a coil casing 6 in this order from the inside thereof and such as epoxy resin 8 and soft epoxy 17 are filled between these constituting members, wherein on the outer surface of the primary coil 5 a cover film which promotes peeling off thereof from the epoxy resin 8 is formed, and because of existence of these peeling off portions between the primary coil 5 and the epoxy resin 8 and between the layers of the primary coil 5, a stress component induced inside the secondary coil bobbin 2 due to heat contraction difference between the primary coil 5 and the secondary coil bobbin 2 among thermal stress induced inside the secondary coil bobbin 2 is reduced.

Abstract: To improve an anti-heat shock performance and an electric field concentration relaxation (an insulation performance) between a secondary coil and a center core, to attain a narrow diameter structure in an individual ignition type ignition coil and further to improve an assembling working of the ignition coil. The individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coil 3 is positioned at an inner side of a primary coil 5 and between a secondary bobbin 2 and a center core 1 a soft epoxy resin 17 is filled up. In the secondary bobbin 2, a secondary coil low voltage side is a potting side of the soft epoxy resin 17 and an inclination having a difference in an inner diameter is provided on the inner diameter in which the secondary coil low voltage side is formed large and secondary coil high voltage side is formed small.

Abstract: An ignition coil having a core with a first leg and a second leg, a first primary winding arranged over the first leg, a second primary winding arranged over the second leg, a first secondary winding arranged over the first primary winding, a second secondary winding arranged over the second primary winding, and a spark plug terminal electrically connected to one end of the second secondary winding. The first primary winding is connected in series to the second primary winding. The first secondary winding is connected in series to the second secondary winding. The core is of a laminated steel construction. The first and second secondary windings are progressively wound in multiple layers over respective bobbins.

Abstract: An ignition system for an internal combustion engine is designed so that it can be inexpensively produced in a manner advantageous from a standpoint of production engineering. The ignition system includes a shaft in a cylinder head of an internal combustion engine and a coil rod, which can be inserted over a portion of its longitudinal extension into the shaft. The coil rod forms an open magnetic circuit which is controlled by a tubular, longitudinally slit return plate. This return plate is set apart from the coil rod, in the shaft of the cylinder head. The ignition system is intended to be used in the automobile industry.

Abstract: In order to provide a resin sealed electronic device which is capable of securing high reliability by packaging with a transfer molding resin without using any under filler material, a resin sealed electronic device mounts a flip chip type monolithic IC on a hybrid circuit board through bumps and is packaged with a thermosetting resin through transfer molding. The transfer molding resin has a linear expansion coefficient of 3×10−6 to 17×10−6 and contains a filler having a particle size smaller than a height of the bump by more than 10 &mgr;m. The resin sealed electronic device is integrated in a unit including the hybrid circuit board mounting the flip chip type monolithic IC through transfer molding with the transfer molding resin, and the bump is restrained from moving by the transfer molding resin flowing around at transfer-molding.

Abstract: An ignition apparatus is received in a plug hole which is formed by a cylinder head and a cylinder head cover of an internal combustion engine. A side core has a slit between two horizontally extending side wall ends. The side core is selected from a laminated sheet structure comprised of two grain oriented silicon steel sheets, each having a slit between two horizontally extending side wall ends, and the plural slits align at substantially the same position. The slit prevents a one-turn short of a magnetic flux of the side core. Thereby a predetermined secondary voltage more than an engine requirement secondary voltage is obtained. An ignitor reception portion has an independent and individual ignitor reception portion and an independent and individual coil reception portion, with the ignitor reception portion and the coil reception portion being combined.

Abstract: An ignition coil assembly adapted to be mounted directly in a plug hole of an internal combustion engine. The coil assembly includes a primary coil and a secondary coil. The spool upon which the secondary coil is wound is cylindrical in shape and has ramp structures provided at each end thereof. The ramps decrease voltage concentration between the secondary and primary windings, decrease the voltage gradient along the end wall of the secondary spool, and minimize adverse effects of gaps created during thermal expansion/contraction.

Abstract: An angular pin is used in a connecting portion of each component, and a plated copper wire for electrical connection of the component is wound at several turns around the angular pin.

Abstract: A spring assembly having a coil containing a core and methods and apparatus for manufacturing same are disclosed. The coil includes a core between reduced portions of the coil. One device for manufacturing the coil includes a coiling machine having an insert device operable with a coiler. The coiler is programmed to form coils of appropriate diameter along the length of the coil, including a diameter sufficiently large to contain the core and two diameters sufficiently small to retain the core in the coil. The insert device transfers the core to the coil after the first small diameter is formed and before the second small diameter is formed. The coil with the core contained between the two small diameters is thereby manufactured in a unified automated process.

Abstract: A less-deformable resin-sealed electronic apparatus of high reliability capable of increasing the robustness (long life-time) of soldered portions of a power semiconductor device for use in internal combustion engines while increasing the physical stiffness of an overall apparatus structure for achieving enhanced resistance to flexure or bending stresses is provided. A hybrid IC substrate 2 and power semiconductor device 3 are mounted on a metallic heat sink 1. The power semiconductor device 3 is coupled and contacted with the heat sink 1 by use of an Sn—Sb alloy-based solder material 4. The power semiconductor device 3 and hybrid IC substrate 2 plus heat sink 1 as well as input/output terminals 6-1 to 6-3 are embedded in a package 7 except for part of the input/output terminals, which package is made of epoxy at 70 to 90 weight percent (%) of an inorganic loading or filler material as machined by transfer mold techniques.

Abstract: The object of the invention is an ignition component for internal combustion engines. It comprises: a secondary winding (4); high-voltage output means (11-13) for the said secondary winding capable of supplying an ignition spark to a cylinder of an internal combustion engine; a primary winding (2); a casing (7) in which are arranged the said windings and the said high-voltage output means; and holding means for holding the windings and the output means in the casing.

Abstract: A high voltage post terminal is accurately located within a support aperture during manufacturing processes by at least one inwardly directed projection to avoid assembly problems caused by sizing the entire aperture itself to locate the terminal with sufficient accuracy. By thus improving the concentricity of the high voltage coil components it is possible to achieve more reliable insulation between components at even relatively small-sized coils used for individual engine plug holes. An especially advantageous range of critical parameters has been discovered as achievable by using this more reliable manufacturing process.

Abstract: An ignition coil comprises a center magnetic core, a secondary coil wound on a secondary coil bobbin which is arranged at an outer side of said center magnetic core, a primary coil wound on a primary coil bobbin which is arranged at an outer side of said secondary coil. At least one of said secondary coil bobbin and said primary coil bobbin is formed by a, material which contains sulfur in a main chain of an aromatic class. The ignition coil has a superior anti-electric treeing. A coil component of the secondary coil and the primary coil of the ignition coil is arranged and accommodated in a coil case, an epoxy resin filling up at least melting silica is potted and is hardened. A development of the electric treeing can be restrained and the ignition coil having a superior endurance performance can be provided.

Abstract: An individual ignition type ignition coil device for engine which is directly connected to each spark plug for use, comprises a coil case 6, and a center core 1, a secondary coil 3 wound on a secondary bobbin 2 and a primary coil 5 wound on the primary bobbin 4 each concentrically installed inside the coil case 6 in turn from the inside to the outside. Insulating resin 17, 8 is filled between the interiorly installed structural members. The secondary bobbin is made of material of modified PPO mixed with inorganic matter of 30% or more.

Abstract: An ignition system for an internal combustion engine is able to operate without malfunctions, even under unfavorable surrounding conditions, in particular intensive attack by spray water. To that end, the ignition system, projecting into a compartment of a cylinder head, is provided with a protective covering in which are formed a connecting duct that is connected to the compartment, and a vent duct leading into the atmosphere. Both ducts are interconnected by a storage of the ignition coil. Water penetrating into the ignition coil is caught in the storage and evaporated in such a way that no malfunctions occur at the ignition coil. The ignition system is preferably used in manufacturing automobiles.

Abstract: An ignition coil has concentrically arranged components including a core, a secondary winding spool adjacent to the core, a secondary winding wound on the spool, a case made of electrical insulating material, a primary winding wound on an outer surface of the case, and a shield disposed radially outwardly of the primary winding. The case is configured so as to allow the primary winding to be wound thereon and to space the shield a predetermined space from the primary winding. A radially inner surface of the case and a radially outer portion of the secondary winding define a single potting channel for receiving an epoxy potting material. The configuration eliminates the primary winding spool, which reduces material cost, and further eliminates the effective dielectric contribution of the primary winding spool for reduced capacitance to thereby provide improved secondary winding output.

Abstract: An ignition coil comprises a center magnetic core, a secondary coil wound on a secondary coil bobbin which is arranged at an outer side of said center magnetic core, a primary coil wound on a primary coil bobbin which is arranged at an outer side of said secondary coil. At least one of said secondary coil bobbin and said primary coil bobbin is formed by a material which contains sulfur in a main chain of an aromatic class. The ignition coil has a superior anti-electric treeing. A coil component of the secondary coil and the primary coil of the ignition coil is arranged and accommodated in a coil case, an epoxy resin filling up at least melting silica is potted and is hardened. A development of the electric treeing can be restrained and the ignition coil having a superior endurance performance can be provided.

Abstract: A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.

Abstract: An individual ignition type ignition coil device for engine which is directly connected to each spark plug for use, includes a coil case (6), and a center core (1), a secondary coil (3) wound on a secondary bobbin (2) and a primary coil (5) wound on the primary bobbin (4) each concentrically installed inside the coil case (6) in turn from the inside to the outside. Insulating resin (17), (8) is filled between the interiorly installed structural members. The secondary bobbin is made of material of modified PPO mixed with inorganic matter of 30% or more.

Abstract: A stick-type ignition coil to be directly connected to a spark plug via a spring. A high tension case containing a high tension terminal and a spring is integrally connected to the bottom end of a high tension generating portion of the ignition coil. The high tension terminal and the spring are separately supported in the high tension case before the spark plug is connected to the ignition coil. When the spark plug is connected, the spring is compressed and contacts the high tension terminal, thereby making electrical contact between the ignition coil and the spark plug. Since the spring and the high tension terminal are supported on separate positions in the case, the spring can be properly compressed without being distorted or jammed between the high tension terminal and the case.

Abstract: An ignition coil that can be easily assembled, that assures co-axial alignment of a primary coil, a secondary coil and a center core part, and that generates desired high voltage. A core body is formed to have an outer diameter larger than that of a permanent magnet so that the permanent magnet will not protrude out of the outer peripheral face of the core body. Accordingly, when the center core part is inserted into a secondary spool, the center core part is not caught by the secondary spool and may be readily inserted and assembled therewith. Also, because no bulge is created at the center core part, it is possible to prevent the center core part from tilting within the secondary spool and to readily assure the co-axial alignment of the primary spool, the secondary spool and the center core part. Thus, voltage generated by the secondary coil is prevented from dropping, and high voltage may be applied to the ignition plug.

Abstract: An ignition coil assembly module (40) that can be connected to and disconnected from an engine spark plug. The module elements are arranged as a succession of cylindrical layers about a central ferromagnetic core (46). From innermost to outermost, the succession is: a) a secondary bobbin (48), b) a secondary coil (58), c) a secondary encapsulant (194) encapsulating the secondary coil, d) a primary bobbin (50), e) a primary coil (56), f) an inner wall (181) of an environmental shield (42) encapsulating the primary coil, g) a ferromagnetic shell (52), and h) an outer wall (180) of the environmental shield encapsulating the shell. The primary bobbin forms a liquid container for holding secondary coil encapsulant. A terminal (100) extends through a transverse wall (71) of the primary bobbin for carrying secondary current from the secondary coil to another terminal (118) on the other side of the transverse wall that connects to a spark plug (80).

Abstract: An engine igniting coil device adapted to be mounted in a cylindrical bore of an engine and directly connected with an ignition plug therein has a coil case containing an igniting coil assembly and made of conductive magnetic material which is held at the ground potential level, thus preventing a decrease of output factor of the igniting coil of produced magnetic flux when spreading about and passing through a cylinder head of the engine and eliminating the possibility of leakage discharge from a high-voltage portion of the igniting coil assembly to the coil case and the cylinder head.

Abstract: A high power, high energy inductive ignition system with a parallel array of multiple ignition coils Ti (2a, 2b) and associated 600 volt unclamped IGBT power switches Si (8a, 8b), for use with an automotive 12 volt storage battery (1), the system having an internal voltage source (12) to generate a voltage Vc approximately three times the peal primary coil current with coils Ti of low primary inductance of about 0,5 millihenry and of open E-type core structure for spark energy in the range of 120 to 250 mj, the system using a lossless snubber and variable control inductor (6) to provide very high circuit and component efficiency and high coil energy density, in mj/gm, three times that of conventional inductive ignition systems, and high output voltage of 40 kilovolts with fast rise time of 10 microseconds.

Abstract: An ignition coil, spark plug, and pressure sensor for an internal combustion engine are integrated into a single assembly and mounted directly on a plug hole of an internal combustion engine. A hard spark plug shell serves as a magnetostrictive section for pressure detection. A radially polarized biasing magnet is disposed adjacent the spark plug shell thereby generating an initial flux through a sensing winding. The sensing winding is wound about the lower end of the coil case to sense changes in the induction characteristics of the spark plug shell as a result of pressure changes in the cylinder. A first passive method of sensing pressure whereby the flux change due to the permeability change generates a signal voltage in the sensed coil. This voltage is proportional to the time rate of change of pressure which is integrated to produce a cylinder pressure waveform.

Abstract: A plurality of ignition coils and a plurality of switching assemblies are accommodated in one case, and a wire harness which interconnects the winding, connectors, and the switching assembly is formed as a unit using a plurality of conductors by means of a resin. In addition, respective electrical connections are established by welding, and soldering is disused. Thereby, it is provided an ignition device in which troublesome wiring between a coil and a switching assembly is eliminated and the reliability of electrical connections is improved, and which is compact and lightweight.