Abstract: A two-piece spark plug includes an electrically conductive outer housing including a cylindrical member having an outer wall and an inner wall, the inner wall defining a passage through the outer housing, and a plug member releasably coupled within the outer housing and including an axial electrode and an electrically insulating insulator element encircling the axial electrode, the axial electrode having a first end for connection to an electrical source and a second end for connection within a combustion chamber, and the insulator element having a circumferential first groove and adapted to be positioned within the passage of the outer housing such that a gas-tight seal is formed between the insulator element and the inner wall of the outer housing.

Abstract: A compliant connector for a connection system in an internal combustion engine includes a cylindrical connector housing and a plurality of constant strain beam springs at one end of the connector housing to act as a self-centering/self-aligning mechanism in the connection system.

Abstract: In an internal combustion engine with direct fuel injection having a cylinder, a piston and a cylinderhead defining together a combustion chamber, a fuel injector with a fuel injection nozzle is mounted in the cylinder head for delivering fuel from the fuel injection nozzle into the combustion chamber so as to form a mixture cone. A spark plug is mounted in a spark plug sleeve disposed in the cylinder head and projects into the combustion chamber beyond the spark plug electrodes and into the mixture cone so as to form at its front end adjacent the spark plug electrodes an open ignition chamber in which part of the rich fuel mixture of the fuel mixture cone is collected for ignition by the spark plug.

Abstract: Combined distribution duct for low current measuring cables and for high voltage ignition cables in internal combustion engines. This device combines a wiring duct having one connector per sensor for each cylinder, and one or more outlets supplying the corresponding ignition coil and any other control. The duct is composed of a steel tube clamped to the engine or divided into two mutually engageably portions having internal grooves for receiving a screening plate, electronic adapter boards, or cable attaching accessories. The two portions may be separated by an internal grooved profiled section. The device is suitable for all kinds of internal combustion engines, but particularly high-powered engines, especially stationary and marine engines.

Abstract: A spark electrode assembly and method of assembling same is disclosed. A ceramic housing having a cylindrical passage provides clearance for a conductive metal electrode. The electrode has a tubular body with rod shaped wires inserted at each end, the wires extending outwardly from the tubular body at each of its ends colinearly. During assembly, the wires are crimped into the tubular body in such a manner that the tubular body is deformed outwardly forming bosses. The bosses are of such a size as to cause an interference fit between the tubular body and the housing passage so that the electrode is captured within the housing. An impact force on the electrode forces the tubular body to expand radially outwardly, thereby further engaging the ceramic housing for holding the electrode in the housing. That part of the electrode body that is not in contact with the housing still has ample room to expand within the housing.

Abstract: An arrangement for easily and rapidly replacing a spark plug in a bore of a cylinder head includes a conductive cylindrical body that screws into the bore. It has a tapered internal passage that receives a replaceable plug with a tapered metal outer surface. A resilient sealing ring retained by the plug seals gas tight against the inner passage. An annular groove on the outer surface of the plug receives groove engaging elements or balls mounted in the body to lock the plug securely in position. A sliding locking sleeve surrounds the groove engaging elements and prevents the elements from moving out of the groove in a locked position. The sleeve may be manually reciprocated to an unlocked position in which the elements are free to move out of the groove so that the plug may be easily replaced. A spring biases the sleeve to the locked position.

Abstract: A plug cap 100 for an ignition plug includes a first annular seal member 30 which seals a gap between an ignition cable 4 and an inner surface of an insulating pipe 20 in a liquid-tight manner and a second annular seal member 24 which seals a gap between an inner surface of an ignition plug-mounting hole 2 and an outer surface of the insulating pipe 20 in a liquid-tight manner. A cap member 40 includes a cover portion 41 which covers those portions of the first and second seal members exposed to the exterior of the engine, and an ignition cable-holding portion 43 which holds and curves the ignition cable 4 to regulate the angle of extension of the ignition cable 4 from the insulating pipe 20.

Abstract: An improved sealing boot for a spark plug assembly is provided which includes a sealing and venting feature capable of preventing pressurized contaminants from reaching the spark plug by effectively sealing the spark plug mounting bore while permitting pressurized gas accumulating in the plug well to be vented to the engine overhead. The sealing and venting feature includes at least one annular sealing rib formed on the outer surface of the boot. The radial length and width of the sealing rib, and the resiliency of the material forming the rib, are selected to cause the rib to deflected outwardly an optimal degree, when the assembly is positioned in the bore, and to engage the bore wall with a sealing force so as to permit the desired sealing and venting. The optimal deflection causes the creation of an additional sealing force due to the pressure of fluid against the deflected portion of the rib thereby ensuring sealing.

Abstract: A spark plug is provided for internal combustion engines in which a tapered chamber or thrust nozzle is provided that terminates at the spark gap. The thrust nozzle is provided with a plurality of openings whereby fuel/air mixture is drawn from the main combustion chamber into the thrust nozzle in contolled flow.

Abstract: An electrical insulator in accordance with the present invention includes a body, a ventilation passage, a bore, and a duckbill-shaped valve. The ventilation passage which extends between a first opening and a second opening in the body. The bore also extends through the body and is spaced from the ventilation passage. The duckbill-shaped valve comprises at least two walls. The walls are connected on opposing sides of the second opening and at an angle with respect to the body and each other so that the walls engage each other and define a space above the second opening and below the walls. A slit is formed between the walls. The portion of the walls at the slit normally remain in contact with each other until a cracking pressure is reached.

Abstract: An ignition coil for an internal combustion engine, having a seal between the ignition coil and a plug hole of the engine. An air passage is provided only on a head portion and a pipe portion of the ignition coil to permit air to pass. Pressure change in the plug hole can be equalized with the atmosphere through the air passage. Therefore, it becomes easy to make the seal and to attach the seal to the ignition coil because the seal does not have any air passage.

Abstract: An ignition coil for an internal combustion engine, includes a housing to be mounted in on the internal combustion engine and a coil portion dipped in an insulating oil filled in the housing. The housing is molded of a material containing any selected from the group consisting of polyphenylene sulfide, polyphenylene oxide, polyarylate, polyether imide and a liquid crystal polymer, and a reinforcing filler is added to the material.

Abstract: An arrangement for easily and rapidly replacing a spark plug in a bore of a cylinder head includes a conductive cylindrical body that screws into the bore. It has a tapered internal passage that receives a replaceable plug with a tapered metal outer surface. A resilient sealing ring retained by the plug seals gas tight against the inner passage. An annular groove on the outer surface of the plug receives groove engaging elements or balls mounted in the body to lock the plug securely in position. A sliding locking sleeve surrounds the groove engaging elements and prevents the elements from moving out of the groove in a locked position. The sleeve may be manually reciprocated to an unlocked position in which the elements are free to move out of the groove so that the plug may be easily replaced. A spring biases the sleeve to the locked position.

Abstract: An ignition device for an internal combustion engine, comprising, a spark plug 7 including a high voltage terminal 8, an ignition coil 1 for generating a high voltage to be supplied to the spark plug, and adapter assembly 19a for electrically connecting the ignition coil to the high voltage terminal of the spark plug, said adapter assembly having a support sleeve 20 for accommodating and supporting the high voltage terminal of the spark plug against a transverse movement of the high voltage terminal. The support sleeve may be a continuous extension, a metal tube of the adapter assembly. The assembly may also comprises a wear resisting material which may be an elastic member, a metal member. An electrical connector for use in such ignition device is also disclosed.

Abstract: An electrical connector connecting a spark plug to an ignition coil comprising electrically insulating caps each having a cylindrical engaging surface adapted to be attached to the spark plug and the ignition coil. An electrically insulating sheath is attached and engaged with the engaging surfaces of the insulating caps at the engaging surfaces at its opposite ends so that at least one cylindrical engaging interface is defined therebetween. An electrical conductor is supported by and extended through the insulating sheath for electrically connecting the ignition coil and the high voltage terminal of the spark plug to each other. The electrical connector also comprises an electrically insulating structure, disposed in the engaging interface between the engaging surfaces of the caps and the sheath, for providing additional electrical insulation in the engaging interface.

Abstract: An ignition plug cap for connecting an ignition plug terminal and a high tension cable, having a rubber cap at the lower end portion thereof and a plug cap pipe connected with the rubber cap, wherein the ignition plug cap further comprises a flange having a longer diameter than that of the rubber cap and integrally formed on the external surface of the plug cap pipe with its lower surface abutted to the rubber cap.

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: A transformer assembly having an elongate body including a cup portion containing primary and secondary coils, a base portion, and a stem is adapted to be installed in a housing of a cylinder head. An electrical source extends through the stem and base portion. An electrical connecting system includes an electrical conductor adapted to receive the voltage source with a spring contacting the end of a spark plug terminal biasing the conductor in a director away from the spark plug in the installed position. The electrical connector system further includes a positioning device adapted to positive align and contain the transformer assembly within a valve mechanism compartment defined between a cover and the cylinder head. A spring member connected to the cup portion axially biases the electrical conductor in a direction toward the spring in contact with the spark plug terminal insuring an electrical connection.

Abstract: There is disclosed an ignition system for an internal combustion engine wherein insertion of a terminal (41) into a sleeve (55) from above a cap (51), with an upper portion of the sleeve (55) fitted in a sleeve receiving portion (51b) of the cap (51), causes a ledge (42) on an upper portion of the terminal (41) to advance beyond a ledge (53) of the cap (51) made of rubber into a position lower than the ledge (53), whereby an upper side of the ledge (42) engages the ledge (53) to prevent the upward movement of the terminal (41) and a lower side of the ledge (42) is locked to an upper end surface of the sleeve (55) to prevent the terminal (41) from slipping off downwardly, thereby completely positioning the terminal (41).

Abstract: A coil and spark plug assembly includes a substantially cylindrical tube housing the coil. The tube includes an element at a first end to transmit a low voltage power source to the coil, and an attachment device at a second end for attaching the tube to an engine. The tube further includes an internal device to house a terminal end of the spark plug and a high voltage connection for connecting the coil to the spark plug. The spark plug includes a firing end, a tower shaped insulator at the terminal end opposite the firing end, and a high voltage terminal recessed within the insulator. The terminal is constructed and arranged to make an electrical connection with the high voltage connector when the terminal end of the spark plug is inserted into the second end of the tube. The spark plug further includes a first surface formed around the spark plug, wherein the surface is constructed and arranged to match a mating surface formed on the engine, and a second surface formed around the spark plug.

Abstract: An ignition system for an internal combustion engine, comprising: a tubular insulating member which has a through-hole;a tubular terminal which is mounted in an upper portion of the through-hole; an ignition coil which has a first terminal;the first terminal being fitted into an upper portion of the terminal so as to be electrically connected to the terminal; a coiled spring which is attached to a lower portion of the terminal and is loosely fitted into a lower portion of the through-hole; a spark plug which has a second terminal fitted into the through-hole from a lower portion of the insulating member; the second terminal being brought into contact with the coiled spring so as to be electrically connected to the coiled spring; and a buckling preventive portion for reducing an inside diameter of the through-hole, which is provided at a portion of the through-hole between the lower portion of the terminal and an upper portion of the second terminal so as to prevent buckling of an intermediate portion of the c

Abstract: A sparking plug cap for internal combustion engines which is made of a resin selected from the group consisting of an alloy of polyphenylene sulfide and polyphenylene oxide, polyarylate, polyether imide and a liquid crystalline polymer, which sparking plug cap is excellent in insulation durability at a high temperature, particularly under a high humidity or in the presence of water.

Abstract: A modular system for providing electrical power to the input contact of an engine igniter is constructed within a hollow container. The container includes a space for mechanically mounting and providing electrical power to the igniter. When the igniter is placed within the hollow container, electrical contact is made between the exciter module and the engine igniter.

Abstract: A body, having a throughgoing bore formed therein has an intermediate land. A first portion of the bore is threaded to receive a spark plug therein, and an outer portion of the body is threaded to accommodate its insertion into a cylinder head. A channel, opening externally of the body, and onto said land, is provided for admitting fuel therethrough to a body-held spark plug.

Abstract: A toroidal chamber in a piston communicating through an orifice at a top face of the piston located in an internal combustion system, such as a spark ignition engine or a compression ignition engine. The chamber arranged to receive a fuel/air mixture so that a flame front, propagated in a main combustion chamber outside the toroidal chamber reaches the toroidal chamber, the fuel in the toroidal chamber burns. The burning creates pressure in the chamber that exceeds the pressure in the main combustion chamber. The combustion gas of high pressure is jetted out of the toroidal chamber into the main combustion chamber. The high pressure combustion gas jet generates turbulence and mixing in the main combustion chamber, contributing to an improved combustion. Accordingly, the power output and the thermal efficiency of the internal combustion system is improved.

Abstract: An improvement in a wire loom mounting provides an appendage on a header flange, a non-circular aperture in the appendage, an insert keyed to fit the non-circular aperture, and means for mounting wire loom structures on the insert.

Abstract: Disclosed is an ignition coil for an internal combustion engine, which comprises a coil portion including a primary winding and a bobbin around which a secondary winding is wound, a resin case for accommodating the coil portion, a conductive secondary auxiliary terminal fixed to the flange of the bobbin and around which the end portion of the secondary winding is twined, a conductive secondary terminal confronting with the winding portion of the bobbin and assembled to the secondary auxiliary terminal, and a high tension voltage terminal connected to the secondary terminal for supplying a secondary high tension output to the outside.

Abstract: A shielded spark plug boot assembly for an ignition cable connector has a tubular elastomeric boot having a cable end portion that receives an ignition cable, an intermediate cavity portion that houses a terminal at the end of the ignition cable, and a seal end portion that receives a spark plug and seals around an insulator thereof. The shielded spark plug boot assembly also has a heat shield and a coil spring. The heat shield is mounted on the cable end portion of the elastomeric boot and it includes a metal shell that has a lower end portion which extends below the seal end portion of the elastomeric boot and which includes a conical portion that leads to a collar of reduced diameter at the lower end of the heat shield.

Abstract: An ignition apparatus for internal combustion engines of which configuration is simplified to reduce production cost and improve reliability of the apparatus. The present invention with the above object can be completed in three main embodiments. The ignition apparatus according to one embodiment of the present invention has a distributor cap. The distributor cap comprises an ignition coil; a central electrode connected to the ignition coil; a plurality of side electrodes each connected to an ignition plug of each cylinder of the engine and selectively connected to the central electrode; a plurality of diodes each connected to the plurality of side electrodes each; a terminal connected to the diodes for outputting ion detecting signals; and a resin portion for holding the central electrode, the plurality of side electrodes, the plurality of diodes, and the terminal.

Abstract: A capsule, the interior volume of which is an ignition chamber, is provided with an engine to improve ignition. The capsule has an orifice so the ignition chamber can communicate with a main combustion chamber of the engine. Often, the capsule is connected to a spark plug and the electrode gap of the spark plug is in the ignition chamber. The capsule causes the combustible mixture in the engine to swirl in a controlled manner as it flows from the orifice towards the electrode gap. The interior surfaces of the capsule are contoured such that momentum of the swirling combustible mixture is conserved, thus maintaining the velocity of the swirling combustible mixture as it proceeds from the orifice of the capsule to the electrode gap and also providing an increased velocity of the ignited mixture as it exits the capsule.

Abstract: An ignition coil disposed and used in the neighborhood of a part made of a conductive material is provided with a first core made of a magnetic material, around which a primary coil and a secondary coil are wound; and a second core made of a magnetic material and having a cylindrical portion, in which the primary coil and the secondary coil and the first core are contained, and forms a closed magnetic path in conjunction with the first core.

Abstract: Two fundamental types of auxiliary devices for increasing the fuel efficiency of a conventional spark plug without reforming any part of the spark plug. Each type has a pair of opposing tongues having parallel grooves on their opposing inside faces and flat portions bridging the tongues with which the device is attached to either the top of metal housing and/or ground electrode or the top of center electrode by welding or caulking.

Abstract: A discharge device of the present invention including a pair of electrodes opposingly disposed in a sealed tube is characterized by the provision of a conductive member surrounding one of the electrodes in the sealed tube. An ignition system with a series gap has a built-in discharge device provided with a series gap, with one end connected to the center electrode side of the spark plug and with the other end connected to the high-tension cable side extending from the high-voltage distribution side. In this ignition system, a discharge device has a conductive member which surrounds one of the electrodes of the sealed tube, and one of the electrodes enclosed with the conductive member of this discharge device works as a cathode.

Abstract: Prior engine ignition systems for a multicylinder spark ignited engine have been too complex and have incorporated external wiring cables and a plurality of transformer assemblies that placed the individual primary and secondary coils thereof in an external location for better heat dissipation. Thus the cable and transformer assemblies were subject to damage by personnel working on the engine. These problems have been overcome by the engine ignition system including a transformer assembly having an elongate body including a cup portion containing the coils, a base portion, and a stem portion. A conducting core extends through the stem and base portions and a suitable clip connects the core electrically to a spark plug installed in a profiled bore of the cylinder head.

Abstract: A clamp for ignition cables has a band-like clamp holder tightly wound around the body portion of a rubber ignition plug cap enclosing the end portion of an ignition cable and has inserting and fixing portions provided on the outer circumference thereof, and has clamp pieces each having an inserting and fixing leg piece designed to be inserted so as to be releasably fixed in the respective inserting and fixing portions in a locking manner and has cord holding portions with a cord inserting port provided at the upper portion thereof. These clamp holder and clamp pieces are formed from a non-rubber rigid material. The clamp pieces are inserted into the clamp holder tightly engaged around the body portion of the ignition plug cap so as to be fixed and locked therein in an erect fashion. Ignition cables are then inserted into the cord holding portions and fixedly held therein.

Abstract: An internal combustion engine includes a cylinder head and a permanent ground electrode and replaceable center electrode element received in a cylinder head bore. The permanent ground electrode is affixed to the cylinder head at the inner wall thereof and protrudes into the combustion chamber. The ground electrode preferably has a cup-like configuration defining an electrode-receiving hollow in the combustion chamber in registry with the bore. The center electrode element comprises a center electrode and an insulator body having a shoulder for engaging a seat in the bore. The insulator body shoulder is clamped against the seat by an annular retainer nut. When the center electrode element is so clamped, the center electrode is received in the electrode-receiving hollow defined by the ground electrode in the combustion chamber so as to cooperate with the ground electrode in defining a spark gap therebetween.

Abstract: A method of installing spark plugs in a diesel internal combustion engine during conversion of the engine to a spark ignited internal combustion engine using gaseous fuel works with an engine originally having a cylinder block, a cylinder head cooperable with the cylinder block, a rocker box cooperable with the cylinder head and a diesel fuel injector for each cylinder of the cylinder block originally intended to inject diesel fuel into said cylinder. The method involves: removing each diesel fuel injector and replacing it with a spark plug adapter sleeve with a spark plug communicating with the cylinder from which the respective injector has been removed; fixing a plurality of extension sleeves to the rocker box, each extension sleeve being associated with one spark plug adapter sleeve; and providing a seal ring for sealing between the inner end of each extension sleeve and the outer end of the associated spark plug adapter sleeve when the rocker box is fixed on the cylinder head.

Abstract: A number of embodiments of coils for mounting on spark plugs for supplying the voltage for firing the spark plugs. In each embodiment, all operative components are disposed below the upper end of the center electrode terminal of the spark plug for reducing the size requirements of the engine. In some embodiments, the coil is mounted at least in part independently of the spark plug so that the spark plug will not carry the full weight of the coil.

Abstract: An ignition device for an engine is removable without removing the cylinder head cover, for gaining access to the spark plug. A case has a lower portion releasibly fitted around a spark plug mounted to a cylinder head of the engine. First and second bobbins having coils wound thereon are mounted concentrically in the case and a C-shaped core is positioned outside of the case and has distal ends fitted in the bobbins. An ignition head cover removably mounted to the cylinder head cover of the engine supports the core when the lower portion of the case is fitted around a spark plug.

Abstract: A combustion apparatus and a combustion system for an internal combustion engine wherein a funnel-shaped cone with an orifice at the apex thereof is provided in a combustion chamber and spaced from an ignition apparatus so that as a gaseous, combustible mixture is introduced into the chamber, it flows through the cone to the orifice where it is ignited by the ignition apparatus so that the flame caused thereby explodes outwardly through ejection openings and along the external surface of the cone into the chamber so as to envelope the uncombusted gases and cause maximum explosion and combustion of the mixture automatically. The structure is applicable to existing conventional spark ignition engines when the cone is provided at the front end portion of the spark plug. For compression ignition engines, the cone is provided in a pre-combustion chamber in the cylinder head or is attached to the cylinder head and extends into a chamber provided in the piston.

Abstract: An elongated ignition boot for a spark plug having an insulator section and a terminal, the spark plug being located in a spark plug receiving cavity of a cylinder. The ignition boot has a spark plug receiving aperture, a lead receiving aperture to receive an ignition lead and connector terminal, a channelway passing from the spark plug receiving aperture to the ignition lead receiving aperture, and a sealing portion located peripherally at or adjacent the spark plug receiving aperture and urgable against the wall of the spark plug receiving cavity.

Abstract: An ignition system of an engine has a coil which is spaced away from a spark plug to protect the coil from heat of a combustion chamber and combustion gas leakage. The electrical connections between the coil and spark plug of current design practice have not performed satisfactorily due to loosening of connections, absorption of energy within the connectors and the escape of electrical energy. The present ignition extender overcomes these shortcomings by resiliently biasing the extender between the source of high energy and the spark plug to provide a positive and reliable electrical connection therebetween. Further, the extender is of a relatively rigid construction so as to prevent bending and the problems that can result therefrom.

Abstract: Torch jet ignition is used to assist conventional spark ignition. A small (0.5-1 cc) chamber in a spark plug has an orifice (0.1-0.2 cm diameter) adjacent the spark gap to emit a torch jet into the main combustion chamber to enhance the combustion. The combustion is initiated by the conventional spark in the combustion chamber and the combustion ignites the torch jet. In another embodiment, two spark gaps in series are used, one in the main combustion chamber and one in the torch chamber.

Abstract: Apparatus for developing and applying sparks to the combustion chamber of an internal combustion engine. The apparatus comprises separate primary and secondary winding units. The secondary unit includes a spark plug having an insulator. The insulator carries a secondary coil winding which is connected to the electrodes of the spark plug. The insulator has a bore which contains a magnetic core for the secondary winding. The primary winding unit includes a primary winding and a tubular flux carrying part formed of magnetic material. The primary winding unit has a bore which is slipped over a portion of the secondary unit that has the secondary winding. A voltage is induced in the secondary winding by magnetic coupling to the primary winding when it is energized.

Abstract: An ignition system for hydrocarbon fuels based in part on the principle of "flame discharge ignition" of coupling ignition energy to the initial flame front plasma either as a "pulsing flame discharge ignition" or an "enhanced conventional discharge ignition". Electrical, geometrical, spark, and hydrocarbon flame front plasma discharge properties are taken into account and adjusted or tailored to create a flame discharge ignition process capable of igniting very lean mixtures. The system is further improved by modifying the fuel's flame front plasma properties by increasing the ratio of the carbon to hydrogen (C/H) content of the fuel and/or by using additives to further increase the flame front plasma density without reducing the plasma recombination coefficient.

Abstract: A spark plug wire loom is described in which an axially rotatable support routes the wiring and keeps the wires separated. A tapered head mounts a separator to a T-nut mount so that the separator pops into place into a recess in the T-nut mount and is kept there.

Abstract: The invention relates to a pressurized ignition system for an engine. The service life of the igniter for the engine and high altitude operation of the engine are substantially reduced due to arc-over between the terminal of the igniter and the metallic shell of the igniter or the nearest ground. The service life of the igniter and associated components are affected by the hot, contaminated environment in which they operate. The present pressurized ignition system includes a chamber around at least a portion of the igniter and the chamber pressurized to a value of, for example, about two atmospheres for suppressing arc-over. The chamber is pressurized by an air compressor drivingly connected to the engine with the air cooled by an engine aftercooler. Pressurizing the chamber prevents contaminates from entering or collecting in the chamber and affecting operation of the system.

Abstract: An ignition system of an engine has a coil which is spaced away from an igniter to protect the coil from heat of a combustion chamber and combustion gas leakage. The electrical connections between the coil and igniter of current design practice have not performed satisfactorily due to loosening of connections, absorbtion of energy within the connectors and the escape of electrical energy. The present ignition extender overcomes these shortcomings by resiliently biasing a first electrical conducting core into contact with a source of high energy and a second electrical conducting core into contact with an igniter and insulating the first and second electrical conducting cores and a biasing and providng mechanism from the surrounding environment by surrounding them with a first and second telescopingly arranged insulating members. When included in an engine, the extender is combined with a shield to further protect and increase the functional life of the components.

Abstract: An ignition module that is adapted to be secured to an internal combustion engine. The module has a plastic housing and a metallic cover that is adapted to be secured to an engine. A plurality of ignition coils are located within the housing and cover. The lower wall of the plastic housing has conductors embedded therein that electrically connect the secondary windings of the coils to electrical connector assemblies that are carried by the housing and which are adapted to slip over the spark plugs of an engine. The connector assemblies include means for making an electrical connection to the terminals of the spark plugs. The ignition coils have laminated cores that are clamped between the housing and the cover. The cores directly contact the metallic cover so that the cores have a heat transfer path to the cover and are electrically connected to the cover.

Abstract: The invention relates to an ignition cassette unit for an ignition system for a multi-cylinder Otto-type four-stroke engine equipped with at least one spark plug per cylinder, the ignition system including for each spark plug an ignition device (61,62) connectible to said spark plug in the engine substantially without cables, the ignition system also incorporating a control unit (8) sending signals in response to the engine operating conditions for triggering sparks at the spark plugs in a predetermined order. In order to ensure, in such ignition sytems, transmission of maximum ignition voltage to the engine spark plugs and enable simple and safe handling of the ignition system during service the the like, the invention is mainly distinguished in that the ignition devices (61,62) to at least two adjacent spark plugs are included in a common, handleable unit, a so-called ignition cassette (70).