Abstract: Embodiments of the present technology relate to a temperature controllable and variable spark plug, and method of use. An example thermally controlled ignition device may comprise at least one sensor communicatively coupled to a control module for determining whether an engine characteristic is within a desired operating range and at least one heating element for adjusting the temperature of the ignition device.

Abstract: There is provided a spark plug for an internal combustion engine, including: a center electrode extending in the direction of an axis of the spark plug and having a core of higher thermal expansion coefficient than that of a front end thereof, the center electrode including a flanged portion radially outwardly protruding on a rear side thereof and a cylindrical portion located closer to a front end of the spark plug than the flanged portion and being smaller in diameter than the flanged portion; an insulator having an axial hole in the direction of the axis to retain the flanged portion in the axial hole with the cylindrical portion held in a loose-fit state in the axial hole; and a metal shell accommodating the insulator, wherein the spark plug satisfies the following condition: Cb<Cf where Cb is a difference between an inner diameter of the axial hole and an outer diameter of the cylindrical portion at an arbitrary axial position B in the direction of the axis; and Cf is a difference between the inner di

Abstract: The invention relates to an HF ignition device for igniting a fuel in an internal combustion engine with a corona discharge, comprising an ignition electrode, an insulating body on which the ignition electrode is mounted, the insulating body having a continuous channel in which an inner conductor leading to the ignition electrode is disposed, and an outer conductor which encloses the insulating body and, in combination with a section of the inner conductor, forms a capacitor, wherein the channel is filled with an electrically conductive filling material which encloses at least one conductor piece that forms at least one section of the inner conductor.

Abstract: Ir alloy firing tips are bonded on opposed surfaces of a center electrode and a ground electrode facing to a discharge gap. The configuration of a cross-sectional area of the Ir alloy firing tip taken along a plane perpendicular to the axis of the Ir alloy firing tip is out of round. In this cross-sectional area of this Ir alloy firing tip, when it is assumed that a circumscribed circle has a largest diameter A among virtual circles each contacting at least three portions of a visible outline of the cross-sectional area and an inscribed circle has a largest diameter B among inscribed circles each being coaxial with the circumscribed circle, a ratio of the diameter B to the diameter A (i.e., B/A) is equal to or larger than 0.8 and is less than 1.0.

Abstract: A double ignition spark plug has a cavity which is evacuated of substantially all gasses. The insulation portion of the spark plug is formed in two steps at a temperature of 800.degree. to 1000.degree. C. where the first sintering step is when the cavity is open and a first conductor is in place, and a second sintering step is effective to close the cavity and fix a second conductor in place. At least the second sintering step is conducted in a vacuum. The completed double ignition spark plug has substantially all gasses removed from the spark gap within the insulator.

Abstract: A connection part for an ignition device, arranged between an ignition coil and a spark plug for incorporating in a cylinder head of an internal combustion engine, has an isolation housing, a high voltage switching element located in the isolation housing and during application of a trigger voltage is transferred reversibly in an electrically jump-like fashion to an electrically conductive condition, a first junction element located at one end of the high voltage switching element and connected with one pole of the latter and also connectable with a high voltage terminal of the ignition coil which leads to an output voltage of the ignition coil, a second junction element provided at another end of the high voltage switching element and connected with another pole of the latter and provided for receiving a terminal pin of the spark plug, and an element associated with the isolation housing for increasing a capacity region between the high voltage switching element and the first junction element.

Abstract: A discharge tube of the type wherein a voltage is applied across a pair of electrodes to cause a discharge between the anode side electrode and the cathode side electrode. In the new discharge tube, opposing end portions of the pair of electrodes are formed into a non-acute configuration, and a large number of concave or convex portions are formed on a surface at least of the cathode side electrode. A stabilized high discharge voltage can be obtained from an initial stage of discharging with a comparatively small distance between the electrodes. Further, since the surface area of the electrodes is great, exhaustion of the electrodes are dispersed, and the electrodes are superior in durability. Further, since the distance between the electrodes is small, the discharge maintaining voltage is low and the energy loss is decreased.

Abstract: A voltage regulator tube for an ignition system of an internal combustion engine, comprising: a cylindrical enclosure made of electrical insulating material and formed with a hollow extending therethrough; a first metallic sealing member for sealing one opening of the hollow, which is electrically connected to a secondary winding of an ignition coil; a first main electrode mounted on the first metallic sealing member in the hollow; a second metallic sealing member for sealing the other opening of the hollow, which is electrically connected to a spark plug; and a second main electrode which is mounted on the second metallic sealing member in the hollow such that the first and second main electrodes confront each other; wherein inert gas is hermetically filled in the hollow; wherein the following equation is satisfied:-1.5.ltoreq.0.8L-0.72R+3.11H-5.81.ltoreq.1.

Abstract: A gas-filled discharge tube in which a cylindrical protection terminal is fitted to a gas-charging pipe passed through an electrode, and the electrode, the gas-charging pipe and the protection terminal are connected by electrical conductive binder filled in a clearance of these elements. A high-tension cable device in which at least one of a connector terminal or a power supplying terminal is formed with a concave part fitted, contacted with a connection part of an additional function parts such as a series-gap forming discharge tube. A high-tension cable device has a concave part covering an entire connection part of the additional function part and has a threaded part at an inner surface. An outer surface of the connection part of the function part corresponding to the concave part is formed with a threaded part.

Abstract: The discharge tube has an insulating tube formed into a hollow cylinder with one end open and the other closed. An anode electrode, which is formed as a flanged electrode, is hermetically fitted to the open end of the insulating tube and a cathode electrode, which is formed as a bar electrode, is embedded in the closed end of the insulating tube so that only the front end surface of the bar electrode faces the interior of the insulating tube. This construction allows no redundant space within the insulating tube other than the dishcarge space, so that the discharge tube can be minimized in size. This construction also permits a discharge only between the front end of the bar electrode and the inner end of the flanged electrode, stabilizing the electron emission passage or discharge path and therefore the discharge voltage.

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: An ignition amplifier device for the secondary circuit of an ignition system comprises the series connection of a spark gap having an electrode spacing of between 0.05 and 0.2 mm with a condenser. The so formed series connection is shunted to the electrodes of the spark plug.

Abstract: An arrangement for the ignition of ignitable mixtures, especially a spark plug for producing sparks in otto-engines, which is constructed according to high-frequency standpoints and in which at least one condenser arranged in the spark plug is adapted to be charged to a high voltage and is adapted to be discharged as much as possible exclusively in the breakdown phase of the starting phase of the ignition spark by way of a booster gap also arranged in the spark plug and a main gap formed by an ignition electrode with respect to a ground electrode, whereby the breakdown voltage of the booster is higher than the breakdown voltage at the main gap. In particular, for achieving a compact constructive form, satisfactory from a manufacturing point of view, and for optimizing the ignition and flame development, the condenser and the main gap are connected in a series circuit in a preferred embodiment of the invention, with respect to which the booster gap is connected in parallel.

Abstract: To increase the spark intensity delivered from a spark plug, an auxiliary spark gap (33) is serially connected with an auxiliary capacitor (37) and the main spark gap (42), the auxiliary capacitor being charged through a charging circuit including a resistor (45) connected in shunt to the auxiliary spark gap (33) and the auxiliary capacitor, and a further or second resistor (46) connected in shunt across the auxiliary capacitor and the ground or chassis electrode (15), and a shunt capacitor (51) is connected between the main spark plug terminal (27) and the ground or chassis or counter electrode (11, 15) so that, upon breakdown of the auxiliary spark gap, the main spark gap will have a voltage thereacross formed by the charge voltage of the main or shunt capacitor (51) and the additional voltage on the auxiliary capacitor (37) which had been charged through the resistors connected across the auxiliary capacitor and to the main spark plug terminal (27) and the ground terminal or electrode (15) respectively.

Abstract: A photoactive ionization high-tension pulsator is provided between the distributor and the spark plug of a carburetor motor ignition system. The pulsator comprises tubular housing, electrodes disposed therein in spaced apart relationship, and a ring positioned on the inside wall of the tubular housing and being separated from the electrodes. The ring comprises a photoactive material responsive to break down between the electrodes for causing ionization of the gas, whereby to provide high-frequency current in the motor ignition system.

Abstract: A spark plug power enchancer for internal combustion engine comprises a secondary spark gap produced between spaced electrodes separated by a dielectric material formed of a sea shell.

Abstract: A spark plug having an internal auxiliary spark gap in series with an ignition noise suppressor in a center electrode is disclosed. One side of the series gap is formed by a conductive ball which also supports the suppressor.

Abstract: An improved spark plug for use in an internal combustion engine having a capacitive discharge ignition system. The spark plug includes a conventional metal shell supporting an insulator having a center electrode bore extending therethrough. A center electrode mounted in the insulator bore includes an electrode tip which defines a spark gap with a ground electrode. An auxiliary spark gap is formed within the insulator bore immediately above the tip. A low resistance inductive suppressor is mounted above the auxiliary spark gap and has an end attached to a terminal for connection to the capacitive discharge ignition system.

Abstract: A spark plug connector for use in ignition systems of internal combustion engines, said connector having a spark gap component in which two double offset or stepped configuration electrodes are disposed facing each other in a gas-tight discharge tube, said electrodes being electrically insulated and spaced from each other to define a discharge gap therebetween.

Abstract: A pre-ignition gap for coil ignition systems consists of a pair of electrodes which extend into a closed compartment. Each electrode has a free end within the compartment and the free ends of the electrodes are juxtaposed with and spaced from one another. A body of inert gas in the compartment surrounds the free ends of the electrodes. In the region of sparking, the electrodes are composed, at least in part, of a substance selected from the group consisting of aluminum and the transition metals of the fourth, fifth and sixth groups of the periodic system.