An aircraft piston engine magneto having a magnetic rotor and an ignition circuit that includes a charging coil inductively coupled to magnetic poles of the rotor. The charging coil includes a plurality of power coils that are inductively powered off the magnetic rotor and that charge the ignition circuit during rotation of the rotor. One or more of the power coils are electronically utilized by the ignition circuit as a higher turn power coil when the rotor is running at low speeds and as a lower turn power coil when the rotor is running at higher speeds. The ignition circuit is a fully electronic ignition circuit that generates and distributes ignition pulses to the piston engine spark plugs using only non-mechanically actuated electrical components within the magneto.
H02K 11/00 - Association structurelle de machines dynamo-électriques à des organes électriques ou à des dispositifs de blindage, de surveillance ou de protection
H01F 38/12 - Allumage, p. ex. pour moteurs à combustion interne
H02J 50/10 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique utilisant un couplage inductif
H02K 1/22 - Parties tournantes du circuit magnétique
2.
IGNITION SYSTEM AND IGNITER HAVING RUTHENIUM GROUND ELECTRODE AND PLATINUM-IRIDIUM ALLOY CENTER ELECTRODE
An igniter for a gas turbine engine has a shell; an insulator secured within said shell; a center electrode secured within said insulator and electrically isolated from said shell by said insulator, said center electrode having a firing tip formed from a platinum-iridium (PtIr) alloy and having a diameter of at least 0.09 inches; and a ground electrode mounting on said shell and terminating at a firing end of the igniter that is spaced from the firing tip by a gap, said ground electrode having at least one pin comprising ruthenium (Ru) or a ruthenium alloy. The igniter is advantageously used with an ignition system having a positive polarity pulse output.
Aircraft parts and accessories, namely, magnetos and magneto parts; ignition magnetos for engines; ignition harnesses, being aircraft engine parts; spark plugs.
Aircraft parts and accessories, namely, magnetos and magneto parts; ignition magnetos for engines; ignition harnesses, being aircraft engine parts; spark plugs.
5.
AIRCRAFT PISTON ENGINE MAGNETO AND IGNITION SYSTEM
An aircraft piston engine magneto having a magnetic rotor and an ignition circuit with a reconfigurable charging coil inductively coupled to magnetic rotor. The charging coil includes multiple coils inductively powered by the magnetic rotor and electronically reconfigurable from a higher turn, lower amperage power coil for use when running at low speeds into a lower turn, higher amperage coil at higher speeds. The charging coil is configured into the higher turn coil by electronically connecting the multiple coils in series, and into the lower turn power coil by electronically connecting the coils in parallel. The ignition circuit is a fully electronic ignition circuit that generates and distributes ignition pulses to the piston engine spark plugs using only non-mechanically actuated electrical components within the magneto.
An aircraft piston engine magneto having a magnetic rotor and an ignition circuit with a reconfigurabie charging coil inductively coupled to magnetic rotor. The charging coil includes multiple coils inductively powered by the magnetic rotor and electronically reconfigurable from a higher turn, lower amperage power coil for use when running at low speeds into a lower turn, higher amperage coil at higher speeds. The charging coil is configured into the higher turn coil by electronically connecting the multiple coils in series, and into the lower turn power coil by electronically connecting the coils in parallel. The ignition circuit is a fully electronic ignition circuit that generates and distributes ignition pulses to the piston engine spark plugs using only non-mechanically actuated electrical components within the magneto.
F02P 15/00 - Allumage par étincelle électrique ayant des caractéristiques non couvertes dans les groupes ou présentant un intérêt autre que celui visé par ces groupes
B64D 27/04 - Aéronefs caractérisés par le type ou la position des groupes moteurs du type à pistons
An igniter for a gas turbine engine has a shell; an insulator secured within said shell; a center electrode secured within said insulator and electrically isolated from said shell by said insulator, said center electrode having a firing tip formed from a platinum-iridium (Ptlr) alloy and having a diameter of at least 0.09 inches; and a ground electrode mounting on said shell and terminating at a firing end of the igniter that is spaced from the firing tip by a gap, said ground electrode having at least one pin comprising ruthenium (Ru) or a ruthenium alloy. The igniter is advantageously used with an ignition system having a positive polarity pulse output.
H01T 13/32 - Bougies d'allumage caractérisées par les particularités des électrodes ou de l'isolement caractérisées par les particularités de l'électrode de masse
10.
METHOD AND APPARATUS FOR OPERATING TRAVELING SPARK IGNITER AT HIGH PRESSURE
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.
An igniter having at least two electrodes spaced from each other by an insulating member having a substantially continuous surface along a path between the electrodes. The electrodes extend substantially parallel to each other for a distance both above and below said surface. The insulating member has a channel (recess) for receiving at least a portion of a length of at least one of said electrodes below and to said surface of the insulating member. The surface of the insulating member may preferably be augmented with a conductivity enhancing agent. The insulating member and electrodes are configured so that an electric field between the electrodes at said surface does not have abrupt field intensity changes, whereby when a potential is applied to the electrodes sufficient to cause breakdown to occur between the electrodes, discharge occurs at said surface of the insulating member to define a plasma initiation region.
H01T 13/52 - Bougies d'allumage caractérisées par la décharge le long d'une surface
F02P 9/00 - Commande de l'allumage par étincelle électrique, non prévue ailleurs
H01T 13/34 - Bougies d'allumage caractérisées par les particularités des électrodes ou de l'isolement caractérisées par le montage des électrodes dans l'isolant, p. ex. par enrobage
H01T 13/46 - Bougies d'allumage à plusieurs éclateurs
H01T 13/22 - Bougies d'allumage caractérisées par les particularités des électrodes ou de l'isolement avec plusieurs électrodes enrobées dans l'isolant
F02P 23/04 - Autres moyens physiques d'allumage, p. ex. par laser
12.
Method and apparatus for operating traveling spark igniter at high pressure
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.
A device for monitoring a life condition of a spark igniter in a gas turbine ignition system. The device includes an evaluation circuit having circuit components that include a hold capacitor, a transistor, and an operational amplifier arranged to form a sample-and-hold circuit, wherein an igniter spark impulse signal is applied to an input node of the evaluation circuit causing the transistor to turn on and the hold capacitor to discharge for a duration of the igniter spark impulse signal, and wherein a discharged voltage at the hold capacitor is maintained and output by the operational amplifier, the discharged voltage representing the duration of the igniter spark impulse and indicating the life condition of the spark igniter.
G07C 5/08 - Enregistrement ou indication de données de marche autres que le temps de circulation, de fonctionnement, d'arrêt ou d'attente, avec ou sans enregistrement des temps de circulation, de fonctionnement, d'arrêt ou d'attente
F02P 15/00 - Allumage par étincelle électrique ayant des caractéristiques non couvertes dans les groupes ou présentant un intérêt autre que celui visé par ces groupes
A device for monitoring a life condition of a spark igniter in a gas turbine ignition system. The device includes an evaluation circuit having circuit components that include a hold capacitor, a transistor, and an operational amplifier arranged to form a sample-and- hold circuit, wherein an igniter spark impulse signal is applied to an input node of the evaluation circuit causing the transistor to turn on and the hold capacitor to discharge for a duration of the igniter spark impulse signal, and wherein a discharged voltage at the hold capacitor is maintained and output by the operational amplifier, the discharged voltage representing the duration of the igniter spark impulse and indicating the life condition of the spark igniter.
A solid state spark device that operates as a two terminal spark gap in a CDI exciter of an aircraft ignition system. The device includes a triggering transformer, a triggering circuit, and a control circuit. The triggering circuit is electrically connected to a first coil of the transformer and includes circuit elements connected to supply current to the first coil upon charging of the triggering circuit up to a triggering voltage. This current through the first coil of the triggering transformer induces an output in a second coil of the transformer. The control circuit is electrically connected to the second coil and includes a switch controlled by the output from the second coil. The switch, when activated by the triggering circuit, discharges energy from the exciter into an igniter of the aircraft ignition system.
F02P 15/00 - Allumage par étincelle électrique ayant des caractéristiques non couvertes dans les groupes ou présentant un intérêt autre que celui visé par ces groupes
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.
F02P 3/02 - Autres systèmes d'allumage par étincelle électrique caractérisés par le type de production ou de stockage de l'énergie nécessaire comportant un stockage de l'énergie par induction, p. ex. aménagement des bobines d'induction
21.
Aircraft power supply and method of operating the same
An aircraft power supply for providing DC power with improved power quality characteristics. The aircraft power supply includes a transformer control system that can use closed-loop feedback from a DC power output to control switches that can short primary windings turns of a step-down transformer. By shorting turns in the primary, the transformer control system can control or manipulate the turns ratio in the transformer and compensate for decreases in the DC power output.
H02M 7/06 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge sans électrode de commande ou des dispositifs à semi-conducteurs sans éléctrode de commande
H02M 7/08 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge sans électrode de commande ou des dispositifs à semi-conducteurs sans éléctrode de commande agencés pour la marche en parallèle
22.
Method and apparatus for operating traveling spark igniter at high pressure
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.
F02P 3/02 - Autres systèmes d'allumage par étincelle électrique caractérisés par le type de production ou de stockage de l'énergie nécessaire comportant un stockage de l'énergie par induction, p. ex. aménagement des bobines d'induction
23.
Method and apparatus for operating traveling spark igniter at high pressure
An ignition circuit and a method of operating an igniter (preferably a traveling spark igniter) in an internal combustion engine, including a high pressure engine. A high voltage is applied to electrodes of the igniter, sufficient to cause breakdown to occur between the electrodes, resulting in a high current electrical discharge in the igniter, over a surface of an isolator between the electrodes, and formation of a plasma kernel in a fuel-air mixture adjacent said surface. Following breakdown, a sequence of one or more lower voltage and lower current pulses is applied to said electrodes, with a low “simmer” current being sustained through the plasma between pulses, preventing total plasma recombination and allowing the plasma kernel to move toward a free end of the electrodes with each pulse.
F02P 3/02 - Autres systèmes d'allumage par étincelle électrique caractérisés par le type de production ou de stockage de l'énergie nécessaire comportant un stockage de l'énergie par induction, p. ex. aménagement des bobines d'induction
