Abstract: An electrical interface assembly is provided for an ignition system including at least one ignition coil per cylinder in a multi-cylinder engine. Each ignition coil includes a plurality of coil terminals for passing respective electrical signals. One of the electrical signals may be used for discharging a respective spark in a respective cylinder. The interface assembly comprises a respective miniaturized printed circuit board (PCB) on each ignition coil. Each miniaturized PCB is electrically coupled to the coil terminals therein. The interface assembly further comprises a separate electrically conductive structure for electrically interconnecting each miniaturized PCB. The electrically conductive structure may be configured to reduce ohmic losses due to inter-cylinder separation in the electrical signal used for discharging the respective spark.

Abstract: An electronic control unit for a combustion engine having a water coolant passageway in heat transfer adjacency to the unit and adapted to remove heat from the unit. An ECU for combustion engine, comprising: electrical input circuits, electrical control circuits, electrical fuel injection output drive circuits, electrical oil pump output drive circuits and electrical ignition circuits. An ECU is disclosed which is adapted to verify firing of the ignition coils of the engine.

Abstract: The present invention is a reinforced connection between a distributor body and a distributor cap. The distributor cap rests on the distributor body as in the conventional arrangements. However, an additional clamp is provided to mount over the interface between the distributor cap and distributor sandwiching the components there between. A screw/bolt passes through the clamp and through both the cap and distributor body and engages a threaded portion of the clamp. By simply tightening the screw/bolt, the cap and distributor are clamped together without inducing concentrated stresses in the distributor body. The clamp may be used in a retrofit application to strengthen the existing connection between the cap and distributor body, repair the connection in a cracked or otherwise damaged distributor, or installed as part of an original equipment design.

Abstract: A product, product by process, and process according to the present invention integrates an ignition coil driver electronics or ignitor into a plughole coil housing. Electronic components are mounted directly to a printed circuit board serving as a direct connection to connector terminals and/or coil leads via plated-apertures. If required, at least one protective layer can be applied directly to an external surface of at least some of the electronic components mounted on the printed circuit board to compensate for differences in the coefficients of thermal expansion. The protective layer is selected from a group including a conformal coating, a soft buffer material, a hard epoxy globtop, and combinations thereof.

Abstract: An ignition spark enhancing device disposed in the electrical path between a spark source and a spark plug of an internal combustion engine. The device includes one or more coils of conductive hollow tubing formed from a length of conductive tubing and having ends each configured for connection to a spark plug wire or to a spark plug. The tubing is preferably copper and may also be aluminum or other conductive material. At least five complete loops wound concentrically or in helix form are preferred. The device is also preferably coated with a non-conductive material to reduce any risk of electrical shock or short circuit.

Abstract: Internal combustion engine (ICE) on-plug ignition coils with transistor drivers located in powertrain control modules (PCM) or other remote locations are prone to high electrical and magnetic interference (EMI) emissions and are subject to interference from other components due to long connecting wires. Ionization detection circuits have even greater sensitivity to EMI because of their very low signal current levels (microampere). The present feature of the invention integrates both the coil driver transistor and ionization detection circuits into the on-plug ignition coil. In a preferred embodiment, parts rated at 140 degrees centigrade are used in both the coil driver transistor and the ionization circuits which are located on the coil to address temperature and thermal shock concerns. Additionally, parts rated at 20 G are used in both the coil driver transistor and the ionization circuits to address vibration concerns.

Abstract: An engine control unit having electronic components and various circuits for controlling an engine is mounted on a portion substantially just above an intake manifold of the engine. An ignition coil circuit and an injector circuit are formed integrally in a case of the engine control unit. A connector for connecting a sensor circuit to the engine control unit and a harness connecting connector are formed on a peripheral wall surface of the case of the engine control unit.

Abstract: A product, product by process, and process according to the present invention integrates an ignition coil driver electronics or ignitor into a plughole coil housing. Electronic components are mounted directly to a printed circuit board serving as a direct connection to connector terminals and/or coil leads via plated-apertures. If required, at least one protective layer can be applied directly to an external surface of at least some of the electronic components mounted on the printed circuit board to compensate for differences in the coefficients of thermal expansion. The protective layer is selected from a group including a conformal coating, a soft buffer material, a hard epoxy globtop, and combinations thereof.

Abstract: The electronics partitioning for an ignition system with complex control circuits configures a first ignition coil out of a plurality of ignitions coils for an internal combustion engine to include an electronic circuit, such as a complex integrated circuit, that can be shared with the remainder of the plurality of ignition coils. An appropriate wiring harness is configured so that the remainder of the plurality of ignition coils can use the common, shared integrated circuit in the first ignition coil in response to the operation thereof. The inventive arrangement substantially reduces cost of electronics by a factor that is the reciprocal of the number of ignition coils, as well as increases reliability by reducing the absolute total number of complex integrated circuits.

Abstract: An insulator includes a coil side cylindrical portion extending from a plug side cylinder portion in a direction departing from a combustion chamber. One end of the coil side cylindrical portion protrudes in the direction departing from the combustion chamber with respect to a primary winding and a secondary winding. A pressure sensing element is disposed next to the one end of the coil side cylindrical portion. The signal lines of the pressure sensing element are taken out of a casing without passing aside an ignition coil. Thus, the diameter of the casing does not increase. The output signal of the pressure sensing element is not adversely influenced by discharge noises generated from the ignition coil.

Abstract: An ignition apparatus for an internal combustion engine can increase the degree of freedom of wiring paths of electroconductive wires as well as simplifying and miniaturizing a wiring module. Transformers (5A, 5B, 5C) are built into a casing (4) and each includes a core (6), a primary coil (8) and a secondary coil (10) arranged to surround the core for generating a high voltage in the secondary coil (10). A wiring module (20) built into the casing electrically connects the transformers and the switching module with one another. An insulating resin portion (11) fixedly attaches the transformers, the switching module and the wiring module to the casing. The wiring module (20) includes a module main body (22), which is formed by integrating a plurality of conductors (13, 14, 15) with one another through a resin, and flexible electroconductive wires (21) disposed along a surface of the module main body (22).

Abstract: In an ignition coil assembly, a plurality of ignition coils is arranged to be electrically connected to spark plugs received in plug holes of an engine, and a base member detachably engages and holds the ignition coils at corresponding positions, which correspond to positions of the plug holes. Disengaging force for disengaging each ignition coil and the base member from each other is set to be smaller than disengaging force for disengaging each ignition coil and the corresponding one of the spark plugs from each other.

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: In an ignition coil assembly, a plurality of ignition coils is arranged to be electrically connected to spark plugs received in plug holes of an engine, and a base member detachably engages and holds the ignition coils at corresponding positions, which correspond to positions of the plug holes. Disengaging force for disengaging each ignition coil and the base member from each other is set to be smaller than disengaging force for disengaging each ignition coil and the corresponding one of the spark plugs from each other.

Abstract: An engine electronic control unit is inserted through a through hole provided in an intake pipe and mounted in an intake air passage in a direction substantially perpendicularly with respect to a plane of the intake pipe forming the intake air passage. This unit is then secured to the intake pipe using a fixing flange provided at a connector portion. A fixing rail is protruded inside the intake pipe and leading edges of a metal base and a metal cover of the unit are inserted into this rail, thereby securing in position an end opposite to a side of the connector portion of the unit. This realizes an engine electronic control unit offering an outstanding heat radiation performance and vibration resistance, without having to provide special heat radiating parts or without involving an increase in an intake air resistance within the intake air passage. By using such an engine electronic control unit, it is possible to provide a low-cost, compact engine air intake system.

Abstract: An ignition coil for an internal combustion engine with a compact height and width includes an actuated magnetic portion of an iron core around which a primary coil is wound having an axis line crossing an ignition plug axis line of the internal combustion engine at a right angle; and a switching unit which is disposed at an end of the actuated magnetic portion vertically to the axis line of the actuated magnetic portion and intercepts a primary current flowing through the primary coil. This ignition coil can be manufactured at a greatly reduced cost, compared to the conventional ignition coil in which only one of the height or width is made compact, by reducing the required size of the press mold for the case and by reducing the initial investment for the equipment.

Abstract: In order to form contact between a control unit and current loads of an internal combustion engine by electrical components through a cylinder head cover which is seated on a cylinder head of the internal combustion engine, a method includes a pre-fixing step for the electrical components, from which step the electrical components are moved into a fixed position directly or indirectly in the cylinder head cover, after the cylinder head cover has been fitted onto the cylinder head, in order to subsequently connect the electrical components to the control unit.

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 engine cover with integrated ignition system components that provides a protective enclosure for ignition coils in a distributorless ignition system of an internal combustion engine. The cover serves as a cylinder head cover for sealing over the valve assembly of the engine and for that purpose includes a plastic housing having an upper wall and side walls that extend downwardly to a perimeter mounting surface of the housing. The housing includes a unitary compartment that is located above the upper wall. The ignition coils are mounted within the compartment and are electrically connected via terminals to high voltage leads that are embedded in the upper wall and that extend laterally to a corresponding second group of terminals located at the lower surface of the upper wall. These terminals are positioned so as to electrically connect to the engine spark plugs when the cover is installed on the engine.

Abstract: A flywheel magneto generator comprising a flywheel driven by an internal combustion engine and having a permanent magnet, an ignition unit having an ignition coil and electronic devices mounted on a core having magnetic pole portions faced to an outer periphery of the flywheel, the flywheel having a plurality of blower blades provided on the outer faces of the bottom wall thereof and at lease one recess provided in the bottom wall portion of the flywheel and opened between the adjacent blower blades to both of the outer face of the bottom wall portion and the outer face of the peripheral wall portion of the flywheel whereby a cooling wind sent out outwardly in a diametrical direction by the blower blades when the flywheel rotates is blown through the recess against the ignition unit.

Abstract: An electronic device and enclosure assembly is provided for use with an engine arrangement having a plurality of cavities. The assembly comprises an enclosure including a main body having a base panel. The base panel includes a plurality of openings alignable with the cavities. An electronic device is disposable in the enclosure and has a plurality of apertures alignable with the openings and the cavities. The assembly further includes a plurality of fasteners for connecting the electronic device to the enclosure, and for connecting the enclosure to the engine arrangement. Each fastener is configured to extend through an aperture in the electronic device, through an opening in the enclosure, and into a cavity of the engine arrangement.

Abstract: Durability and lifetime of a resin sealed electronic device is improved by reducing thermal stresses acting on the power element and the parts mounting on the board. A power element of which the protective film on the power element is coated with a polyimide group resin at manufacturing the element is used, and a metallic heat sink of which the reverse side surface (portion of mounting on a board) is not plated is used. Further, a linear expansion coefficient of the molding resin is within a range of 3×10−6/°C. to 17×10−6/°C. The durability and the lifetime of the resin sealed electronic device is improved, because the thermal stresses are reduced by balancing linear expansion coefficients of the parts.

Abstract: An electronic control unit for a combustion engine having a water coolant passageway in heat transfer adjacency to the unit and adapted to remove heat from the unit. An ECU for combustion engine, comprising: electrical input circuits, electrical control circuits, electrical fuel injection output drive circuits, electrical oil pump output drive circuits and electrical ignition circuits. An ECU is disclosed which is adapted to verify firing of the ignition coils of the engine.

Abstract: An engine cover with integrated ignition system components that provides a protective enclosure for ignition coils in a distributorless ignition system of an internal combustion engine. The cover serves as a cylinder head cover for sealing over the valve assembly of the engine and for that purpose includes a plastic housing having an upper wall and side walls that extend downwardly to a perimeter mounting surface of the housing. The housing includes a unitary compartment that is located above the upper wall. The ignition coils are mounted within the compartment and are electrically connected via terminals to high voltage leads that are embedded in the upper wall and that extend laterally to a corresponding second group of terminals located at the lower surface of the upper wall. These terminals are positioned so as to electrically connect to the engine spark plugs when the cover is installed on the engine.

Abstract: An engine control unit having electronic components and various circuits for controlling an engine is mounted on a portion substantially just above an intake manifold of the engine. An ignition coil circuit and an injector circuit are formed integrally in a case of the engine control unit. A connector for connecting a sensor circuit to the engine control unit and a harness connecting connector are formed on a peripheral wall surface of the case of the engine control unit.

Abstract: Durability and lifetime of a resin sealed electronic device is improved by reducing thermal stresses acting on the power element and the parts mounting on the board.

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 order to form contact between a control unit and current loads of an internal combustion engine by electrical components through a cylinder head cover which is seated on a cylinder head of the internal combustion engine, a method includes a pre-fixing step for the electrical components, from which step the electrical components are moved into a fixed position directly or indirectly in the cylinder head cover, after the cylinder head cover has been fitted onto the cylinder head, in order to subsequently connect the electrical components to the control unit.

Abstract: An ignition system including an improved power circuit and a timing circuit. The timing circuit includes a microprocessor or microcontroller to provide for engine control. The microcontroller supervises, for example, multispark, revlimit and retard controls. The power circuit includes a variety of overvoltage protection circuitry and employs a reduced size toroid flyback transformer and employs an IGBT (insulated gate bipolar transistor) ignition coil switch.

Abstract: Comparing a conventional ignition coil, both the height and the width become compact and only one type can be used in substitution for a conventional multiple type of the ignition coil. Furthermore, it may be mounted in a severe layout limited by the width and the height. Accordingly, it allows the cost to be greatly reduced by reducing the kind of the press mold for case and investment for the equipment, and reducing the labor cost for a production process and increasing a production quantity for each piece of equipment. An ignition coil for an internal combustion engine includes: an actuated magnetic portion 1b of an iron core 1 which has an axis line crossing an ignition plug axis line of the internal combustion engine at a right angle and around which a primary coil 2 is wound; and a switching unit 4 which is disposed at an end of the actuated magnetic portion 1b vertically to the axis line of the actuated magnetic portion 1b and flows and intercepts a primary current flowing through the primary coil 2.

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: 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: 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.

Abstract: An engine spark ignition system capacitive coupler for capacitively coupling the non-firing spark plug wires to the firing spark plug wire. The device includes a first plate having a first side and a second side, the first side having at least two spaced, electrically conductive surface portions, each surface portion forming a first plate of a capacitor. A second plate of each capacitor is formed by an electrically conductive surface portion disposed in spaced and insulated relationship to the at least two surface portions upon the second side of the first plate. A second plate alignable and abuttable to the first plate and having first and second sides is abuttable to the first plate first side. At least two spaced electrically conductive members are disposed through the second plate. Each conductive member includes a first end for electrical contact with a spark plug wire and a second end for electrical contact with one of the at least two first plate, first side electrically conductive surface portions.

Abstract: In order to reduce the bulk and weight of the upper igniter case division of the armor case, and to lower the center of gravity of the total apparatus so as to provide an igniter which is tough to oscillate, the igniter for the internal combustion engine has the armor case equipped with the coil department and igniter unit therein, and said armor case has the igniter case having the coil department case and the connector department. Furthermore, the coil department case is inserted in the plug hole of the internal combustion engine. The igniter unit is mounted in the igniter case. Furthermore, the igniter unit has a semiconductor device of a simple substance silicon chip having integrated therein a semi-conductor for switching and a current limiting circuitry. The semi-conductor for switching consists of an insulated bipolar transistor (IGBT) or a power transistor.

Abstract: There is disclosed herein an electronic control module assembly 30 for use in an internal combustion engine, wherein the engine includes an intake manifold 10 with N air inlet port(s) 14 and a throttle body 20 with N air outlet port(s) 24 where N=(1 or 2). One embodiment of the assembly 30 comprises: (a) a housing 32 having opposed upper and lower mounting surfaces 34/36 and an outer surface 38 about the housing, and N bore(s) 42 through the housing, wherein each bore has an upstream port 44 defined in the upper mounting surface 34 and a downstream port 54 defined in the lower mounting surface 36; (b) an electronic control module 60 for controlling one or more sub-systems of the engine; and (c) means 70 for attaching the electronic control module 60 to the outer surface 38 of the housing 32.

Abstract: This invention concerns an ignition rail featuring a movable connection between the recesses of the tube portion carrier (ZT) and the connectors of the tube portions (ZR) by means of two O-rings, which connection protects against mechanical overloads and the ingress of humidity.

Abstract: An ignition coil has a stress absorbing member with a coefficient of linear expansion which is smaller than a coefficient of linear expansion of a potting resin. The stress absorbing member faces along a circuit element of a mold ignition circuit and is buried in the potting resin. Thus, stress, caused by temperature change, which is applied to the circuit element of the mold ignition circuit from the potting resin can be reduced by the stress absorbing member. Therefore, peeling at a bonding portion of the circuit elements or at the crack can be prevented. Furthermore, the stress absorbing member is only facing along the circuit element mounting surface, and the mold ignition circuit is not wrapped by the stress absorbing member. Therefore, heat radiation from the mold ignition circuit is not suppressed by the stress absorbing member. The radiation performance of the ignition apparatus is thus improved, and the durability and credibility of the ignition circuit is improved.

Abstract: In order to reduce the bulk and weight of the upper igniter case division of an armor case, and to lower the center of gravity of the total apparatus so as to provide an igniter which is tough to oscillate, the igniter for the internal combustion engine has the armor case equipped with a coil compartment and igniter unit. The armor case has the igniter case having the coil case and connector. Furthermore, the coil compartment case is inserted in the plug hole of the internal combustion engine. The igniter unit is mounted in the igniter case. Furthermore, the igniter unit has a semiconductor device of a single substance silicon chip having integrated therein a semi-conductor for switching and a current limiting circuitry. The semi-conductor for switching consists of an insulated bipolar transistor (IGBT) or a power transistor.

Abstract: An ignition coil device is provided in which a damaged portion can be exchanged and which requires no connector for connecting a power switch with a wiring harness. Since an ignition coil device 2 is constructed such that a primary coil portion 21 and a power switch 22 are secured by fitting the primary coil portion 21 into a hollow core of a secondary coil portion 23 mounted in advance on an engine 30, the primary and secondary coil portions 21, 23 can be detachably connected via an iron core 21c as a magnetic core. Accordingly, only the secondary coil portion 23 having a relatively short life due to the generation of varying high voltage can be easily exchanged. Further, since the power switch 22 and the primary coil portion 21 are integrally or unitarily connected with a wiring harness 40, the construction can be made inexpensive and simple by the deletion of a connector provided in a prior art ignition coil device, thereby enhancing electrical reliability.

Abstract: An ignition coil is composed of a transformer, an igniter, a housing accommodating them and a fixing portion disposed at a place within easy access from an opening of the housing to fix the igniter, a terminal pin disposed at a place of the housing within easy access from the opening and connected to the control circuit and a connector pin fixed to the housing and connected to the terminal pin. The igniter and fixing portion have a member for adjusting relative location therebetween to connect the connector pin and terminal pin without stress.

Abstract: A misfire detecting device for a multi-cylinder internal combustion engine is provided. The misfire detecting device comprises high voltage pulse producing means for producing, after spark discharge of a spark plug, a high voltage pulse which is not so high as to cause the spark plug to discharge, voltage applying means for applying the high voltage pulse to a conductive path connecting between the secondary winding of the ignition coil to the spark plug, by way of a reverse current preventing diode and a leakage preventing diode for preventing intrusion of the high voltage for ignition, voltage dividing means for dividing a voltage at the junction between the reverse current preventing diode and the leakage preventing diode to obtain a divided voltage thereat, and misfire detecting means for detecting a misfire on the basis of a decay characteristic of the divided voltage obtained after application of the high voltage pulse.

Abstract: An ignition device for an internal combustion engine in which an iron coil is easily and securely grounded. In the ignition device, an ignition coil includes an iron core formed by laminating a plurality of cut steel plates; a primary coil wound around the iron core; a secondary coil wound around the primary coil; and a conductive plate being arranged between the iron core and a primary bobbin of the primary coil, having a contact surface with which sections of the steel plates are in contact and being electrically connected to a ground terminal of an external terminal.

Abstract: A redundant ignition system for an internal combustion engine is provided. When the internal combustion system is a waste spark system, opposite ends of first and second secondary windings of first and second coils, are coupled, respectively, to first and second sparkplugs, for igniting first and second cylinders. In one embodiment, a diode or similar structure prevents feedback from one coil to another coil.

Abstract: An ignition apparatus for an internal combustion engine has an ignition coil 4,5 disposed within an electrically insulating case 1, and a power switch 6 disposed within the case and comprising a switching unit 8, 9 for intermittently supplying a primary current to the ignition coil. A gel 12 is disposed over the switching unit and at least one electrical wire conductor 21 having one end connected to the switching unit and the other end extending outwardly of the power switch. An electrically insulating resin 14 fills the insulating case, and supports/covers the ignition coil and the power switch. The electrical wire conductor includes a flexible bent portion 21a disposed within the gel for absorbing any tension in the conductor. With this arrangement, a heat shock resistant performance of the wire conductor is improved and working reliability is also improved.

Abstract: An ignition apparatus for an internal combustion engine includes a power switch 16 for intermittently feeding a primary current to an ignition coil, and primary and secondary coils 5, 6 of the ignition coil contained in an insulation case 1 with the power switch and fixed by an insulating resin material 15 poured into the case. An insulating member 21 is interposed between the secondary coil 6 and the power switch 16 for suppressing thermal flow between the secondary coil 6 and the power switch 16. with this arrangement, a temperature increase caused by thermal interference between the ignition coil and the power switch is thus suppressed.

Abstract: Disclosed is an ignition apparatus for an internal combustion engine which includes an insulation case accommodating a power switch 29 for intermittently feeding a primary current to an ignition coil, a heat sink 26 in contact with the power switch 29 for radiating heat generated by the power switch 29 and the primary coil 4 and the secondary coil of the ignition coil with the power switch 29, the heat sink 26, the primary coil 4 and the secondary coil being fixed by an insulating resin material poured into the insulation case, wherein the power switch 29 is elastically engaged with the heat sink 26. With this arrangement, there is provided an ignition apparatus for internal combustion engine capable of reducing a manufacturing cost as well as the size thereof.

Abstract: A terminal portion (11) of a spark plug (10) and a connecting terminal (22) of an ignition coil (20) are connected through a coil spring (30) serving as a conductive member which in turn is covered with an insulating member (40) having a cap (41), a sleeve (47) and a bushing (48) and extending from the terminal portion (11) to a high-tension tower (21). A first air vent hole (44) is defined by an upper surface of a collar portion (42) of the cap (41) and a bottom surface of an ignition coil body (23) in intimate contact with the upper surface, and a plurality of reservoir spaces (45) having a greater volume than the first air vent hole (44) are formed in circumferentially spaced apart relation along the first air vent hole (44). A second air vent hole (46) is formed in the cap (41) for communication between the first air vent hole (44) and the interior of a plug hole (H).

Abstract: The purpose of the present invention is to obtain a low-cost and easy-to-produce ignition coil for an internal combustion engine.A lead wire 13a of an electronic part 13 is connected to a terminal 12a and a terminal 7a of an intermediate conductor 12 by means of caulking or press fitting. Since the end cut face of the lead wire 13a of the electronic part 13 is sharp, a wall material 71 and a cover 81 as crack spread preventing materials are arranged so as to encircle that end cut face. Further, an opening portion 92 is closed by the intermediate conductor 12, and high voltage is output via a spring 11 directly contacted to the intermediate conductor 12.The number of components may thus be reduced, and cracks generating in an insulating resin may be prevented from spreading.