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: A cartridge unit included in an ignition system of an internal combustion engine includes an upper metal part which is securable to an adjacent part of the engine and a plurality of finger-like connection casings, one for each spark plug, detachably mounted to and extending from the upper part. The connection casings and the upper part, when attached to each other, form an essentially closed inner space encapsulating a high tension block which includes a plurality of ignition coils for generating ignition voltage.

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: An electrochemical system includes a sensor module suitable for implantation in the body to monitor glucose and oxygen levels therein. The module has two oxygen sensors situated in an oxygen-permeable housing, arranged in a tandem relationship, and recessed in the housing, one sensor being unaltered and the other contacting glucose oxidase allowing for differential measurement of oxygen content in bodily fluids or tissues indicative of glucose levels. The module includes a communication capability for transmitting measurement information to an external recording device outside the body.

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).

Abstract: The invention relates to an ignition system for a multicylinder 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 systems, transmission of maximum ignition voltage to the engine spark plugs and enable simple and safe handling of the ignition system during service and 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).

Abstract: The invention relates to 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 systems, transmission of maximum ignition voltage to the engine spark plugs and enable simple and safe handling of the ignition system during service and 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).

Abstract: An ignition unit included in the ignition system of an internal combustion engine includes a plurality of fingerlike connection pieces (2) extending from a common upper part (4) in the ignition unit and connectible to a corresponding number of spark plugs in the engine, the upper part including components included in a high-tension block, each connection piece (2) including an ignition element (20) with an ignition coil for generating ignition voltage, and a connection device (22) for connecting and for transmitting high-tension current to the engine spark plugs. To achieve reliable voltage transmission each ignition element has cable-free electrical connection both to contact means (47) in the upper part (4) and to contact means (27) in its connection device (22).

Abstract: An ignition system for a multi-cylinder internal combustion engine eliminates high-voltage cables and a mechanical distributor in order to reduce electrical power losses due to joule effect caused mainly by the high voltage circuit, comprises a plurality of ignition coils and plugs, one provided for each cylinder, a distribution unit for distributing advance-angle control signals into the respective cylinders, and a booster for boosting the supply voltage in order to reduce the size of the ignition coil, in addition to the conventional ignition system. Furthermore, the ignition coil can be built integrally with the ignition plug for eliminating high-voltage cables connected between coil and plug.

Abstract: An ignition transformer and spark plug cover assembly adapted for mounting on an internal combustion engine for application of ignition signals from an ignition circuit to a respective engine spark plug, including a base member fixedly fastened to the engine, including connector receptacles for making electrical connection thereto, a connector member mounted on the base member and having respective connectors contacts mating with the base member connector receptacles, a transformer assembly including an ignition transformer mechanically connected to and supported by the connector member and including connector pins for making electrical connection between the ignition transformer and the connector contacts of the connector member, and a cover for making electrical connection with a respective spark plug, including a high tension conductor connected to the ignition transformer.

Abstract: An ignition system for an internal combustion engine, wherein separate ignition transformers are mounted directly on respective spark plugs and an A.C. drive signal is applied to the ignition transformers sequentially in accordance with engine timing to fire the spark plugs sequentially. The A.C. drive signal is applied to each of the ignition transformers by means of a leakage transformer whereby ignition currents are maintained at a relatively low level after initiation of the ignition discharge across the spark plug electrodes. In one embodiment, each ignition transformer is composed of plural individual transformers disposed in a planetary arrangement around an axis defined by the respective spark plug. Each of these individual transformers includes at least one secondary winding and at least one primary winding wound on a respective core, with each of the secondary windings mounted in series across the electrodes of the spark plug.

Abstract: An ignition coil for an internal combustion engine including a first case of a hollow synthetic resin, which has one end fixing high voltage terminals for effecting connections with ignition plugs and its other end formed with an opening. Diode terminals are attached to the first case. The high voltage diodes which have the same side ends connected with the high voltage terminals from the first case and their other ends connected with the diode terminals. The high voltage diodes in the first case are encapsulated within an epoxy resin composite. Primary and secondary coils supplied with electric signals synchronized with a rotational speed in a secondary case to which primary and secondary terminals are attached. The second case is filled with an epoxy resin such that gaps between the wirings of the coils are sufficiently impregnated with that epoxy resin. The diode terminals and the secondary terminals are connected through the coils.

Abstract: In a distributor assembly having an ignition coil therein, for use with an internal combustion engine, the positional relationship between the ignition coil and a magnetic sensitive detector, which detects a proper ignition timing, is selected so that the leakage flux from the ignition coil does not cause the magnetic sensitive detector to malfunction. According to one arrangement the magnetic sensitive direction of the detector is arranged perpendicular to the leakage flux from the ignition coil. According to the other arrangement the magnetic sensitive direction of the detector is arranged to intersect a radial line from the axis of the main magnetic flux of the ignition coil at an angle other than 90 degrees so that the flux variation in the detector is expedited by the appearance and disappearance of the leakage flux.

Abstract: An attaching construction for attaching an ignition coil device to the external surface of an internal combustion engine, in which a coil side bracket is mounted to the ignition coil device, an engine side bracket is mounted to the external surface of the internal combustion engine, and a layer, formed of a resilient rubber-like elastomer with low heat conductivity and high temperature resistance, is provided to extend between the coil side bracket and the engine side bracket, so as to join them, and thereby to mount the ignition coil device to the internal combustion engine.