Internal combustion engine

IGNITION DEVICE FOR A GAS ENGINE AND GAS ENGINE, CAPABLE OF STABILIZING AIR-FUEL MIXTURE OF GAS IGNITED BY ONE MORE UNITS OF AN IGNITION SYSTEM

PURPOSE: An ignition device for a gas engine and gas engine is provided to increase stay time of air-fuel mixture of gas ignited and help it to be ignited. CONSTITUTION: An ignition device for a gas engine and gas engine comprises a heater(12) used as an ignition source. A sleeve-like accommodation unit(13) separates each heater from an air-fuel to be ignited. The heater heats a part of each accommodating unit which is in contact with the air-fuel mixture to be ignited up to temperature required to ignite the air-fuel mixture. The heater comprises one or more units(17) stabilizing the air-fuel mixture of the gas to be ignited. © KIPO 2009 ...

START SUPPLEMENTING DEVICE OF DIESEL ENGINE

PURPOSE: To improve reliability of the operation by allowing the quick heating and preventing the heated portion from being exposed to the combustion gas during a normal operation. CONSTITUTION: A rod 17 is inserted into a through hole 16 formed in a cylinder head 10, and the lower end side of the rod 17 is made slender to form a support body 18. A heating coil 19 wound around the support body 18 is arranged in a recess formed at the lower side of the through hole 16. A valve 21 is formed at the tip of the support body 18, and it closes the recess 20 in contact with a valve seat 22. By feeding air into an air cylinder 28, a glow plug is protruded into the cylinder chamber through the rod 17, a lever 27, etc. to perform the starting. COPYRIGHT: (C)1984,JPO&Japio ...

Устройство для зажигания взрывчатой смеси в двигателях внутреннего горения

Двухтактный двигатель внутреннего горения

Improvements in or relating to ignition means for combustion engines

... 149,947. Pickee, D. J. Aug. 16, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Incandescent igniters.-For permitting variation of the time of ignition, the head c is mounted adjustably by means of a threaded sleeve g which forms part of a piston sliding within the casing a. An electric resistance c<2> acting as a heating coil is connected at one end to the casing and at the other by way of a central bolt d to the terminal h.

Self-ignited diesel combustion engine with highly turbulent direct injection

L'invention concerne les moteurs à auto-allumage, à injection directe du carburant pour lesquels la combustion est améliorée grâce à : 1 - un nouveau type de chambre de combustion qui se scinde en deux cham-distinctes, seulement en fin du temps de compression, avec allumage dans la plus petite chambre, ayant subi la plus forte compression. 2 - un élément faisant protubérance dans la petite chambre surcomprimée, isolé thermiquement, au mieux de la paroi qui le supporte, pour pouvoir s'échauffer très fortement par les combustions successives et ainsi raccourcir le délai d'auto-allumage des gouttelettes de carburant. 3 - une amélioration de l'idée qui consiste à transformer les moteurs en accumulateurs de chaleur, en leur adjoignant un réservoir contenant un produit solide fondant à une température proche de 100 deg.C (récupération "gratuite" de la chaleur latente de fusion de cette masse de produit).

Improvements with a cartridge of lighting

Improvements in or relating to adjustable ignition means for combustion engines

... 148,930. Pickee, D. J., (Assignee of Daepfner, -.). Feb. 16, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Incandescent igniters.-An incandescent head c is protected laterally by the walls a<1> of the chamber a. Heating at starting is effected electrically by means of the enclosed resistance c<2>, one end of which is connected to the mass and the other by way of the stem d to a terminal h. The head is carried by a piston-like member g<1> provided with a thread g and handle or the like e by which adjustment for timing may be made.

ENGINE AND IGNITION PLUG INCLUDED IN THE SAME

PROBLEM TO BE SOLVED: To control ignition timing in an ignition chamber appropriately when an ignition plug is not used while reducing the use frequency of the ignition plug to suppress deterioration in its electrode. SOLUTION: In this engine 1, the ignition plug 11 in which the ignition chamber 14 is formed within a plug cover 13 covering an ignition point is fitted to a cylinder head 6, and communication parts 15 communicating the ignition chamber 14 with a combustion chamber 3 facing a piston 2 are provided in the plug cover 13. The engine 1 includes: a surface ignition guiding part 41 storing heat in the ignition chamber 14 and performing surface ignition of air fuel mixture; an indoor state detection means detecting the state within the ignition chamber 14; and a temperature control means controlling the temperature of the ignition chamber 14. The temperature control means controls surface ignition timing by the surface ignition guiding part 41 based on the detection result by the ...

Improvements in or relating to internal combustion engines

Improvements in or relating to internal combustion engines

Optical ignition device with interference principle for new energy automobile

IGNITION DEVICE FOR A GAS ENGINE AND GAS ENGINE

Cold start and warming-up ignition device for diesel engine has catalytically active layer applied to component bounding combustion chamber

The ignition device is in the combustion chamber (1) between the cylinder head (2) and the piston (3). there are valves (4) and an injection jet (5) in the head. The jets (6) spread out in the combustion chamber. The surface of the piston head is coated with a catalytically active layer (7) by which the compressed gas is ignited.

VERFAHREN FÜR EIN MOTORLASERZÜNDSYSTEM

Es werden Verfahren und Systeme zum Diagnostizieren eines Laserzündsystems eines Motors bereitgestellt. In einem Beispiel kann die Steuerung den Laser in einem abgedichteten Zylinder Stunden nach dem Zündschlüsselausschalten betreiben. Dann kann der Zylinder geöffnet werden und eine Veränderung der Abgastemperatur kann mit der Laserfunktionalität korreliert werden.

Method for thermoelectric energy conversion in an exhaust gas recirculation system

Cold Start for High-Octane Fuels in a Diesel Engine Architecture

Embodiments disclosed herein relate generally to systems and methods of operating internal combustion (IC) engines, and more specifically to systems and methods of starting compression ignition (CI) engines when the surrounding environment is significantly colder than the normal operating temperature of the engine (i.e., “cold-starting”). In some embodiments, the CI engine can include an ignition-assist device. In some embodiments, a method of operating a CI engine during cold-start can include opening an intake valve to draw a volume of air into the combustion chamber, moving a piston from a bottom-dead-center position to a top-dead-center position in a combustion chamber at a compression ratio of between about 15 and about 25, injecting a volume of fuel, the fuel having a cetane number of less than about 30, closing the intake valve, and combusting substantially all of the volume of fuel.

COLD START FOR HIGH-OCTANE FUELS IN A DIESEL ENGINE ARCHITECTURE

Embodiments disclosed herein relate generally to systems and methods of operating internal combustion (IC) engines, and more specifically to systems and methods of starting compression ignition (CI) engines when the surrounding environment is significantly colder than the normal operating temperature of the engine (i.e., “cold-starting”). In some embodiments, the CI engine can include an ignition-assist device. In some embodiments, a method of operating a CI engine during cold-start can include opening an intake valve to draw a volume of air into the combustion chamber, moving a piston from a bottom-dead-center position to a top-dead-center position in a combustion chamber at a compression ratio of between about 15 and about 25, injecting a volume of fuel, the fuel having a cetane number of less than about 30, closing the intake valve, and combusting substantially all of the volume of fuel. 143-. (canceled)44. A method of operating a compression ignition engine , the compression ignition engine including an engine cylinder having an inner surface , a head surface , a piston disposed and configured to move in the engine cylinder , an intake valve , an exhaust valve , and an ignition-assist device , the inner surface of the engine cylinder , the piston , the head surface , the intake valve , and the exhaust valve defining a combustion chamber , the piston and the head surface defining a bowl region of the combustion chamber , the method comprising the steps of:opening the intake valve to draw a volume of air into the combustion chamber, the volume of air having a mass-average temperature of less than about 150° C. at the moment the volume of air passes through the intake valve;moving the piston from a bottom-dead-center (BDC) position to a top-dead-center (TDC) position in the combustion chamber at a compression ratio of between about 15 and about 25;injecting a volume of fuel at an engine crank angle between 0 and 360 degrees, the fuel having a cetane number of less ...

LASER DEVICE AND METHOD FOR OPERATING SAME

A method for operating a laser device which has a laser-active solid and a preferably passive Q-switch in which the laser device is acted upon by pumped light for generating a laser pulse. According to the present invention, the pumped volume of the laser device acted upon by a pumped light, in particular of the laser-active solid, is changed.

Plasma generating device, and internal combustion engine

To downsize an electromagnetic wave generation device in a plasma generation device that generates electromagnetic wave plasma by emitting to a target space an electromagnetic wave amplified by means of a solid state amplifying element. The plasma generation device includes the electromagnetic wave generation device that outputs the electromagnetic wave amplified by means of the solid state amplifying element, and an emission antenna for emitting the electromagnetic wave outputted from the electromagnetic wave generation device to the target space. The plasma generation device causes the emission antenna to emit the electromagnetic wave to the target space, thereby generating the electromagnetic wave plasma. The plasma generation device has a characteristic that an output waveform of the electromagnetic wave generation device has a peak during a rise, and is adapted to output the electromagnetic wave to the emission antenna without reducing the peak during the rise of the output waveform ...

Method for thermoelectric energy conversion in an exhaust gas recirculation system

The invention relates to a method for thermoelectric energy conversion in an exhaust gas recirculation system, specifically to a method for managing thermal energy in an internal combustion engine including an exhaust gas recirculation system and an engine cooling system. The method includes recirculating a portion of an exhaust gas through the exhaust gas recirculation system that is in thermal communication with a first side of a thermoelectric device, flowing an engine coolant into thermal communication with a second side of a thermoelectric device, and controlling electric current between an electrical energy storage device and the thermoelectric device to transfer thermal energy between the recirculated exhaust gas and the engine coolant.

LASER DEVICE AND OPERATING METHOD FOR IT

In a method for operating a laser device, which has a laser-active solid having a passive Q-switch, the laser device is acted upon using pumping light in such a way that a specifiable curve over time of the inversion density comes about in the laser-active solid, as a result of which an especially precise control of the time behavior is achieved during the generation of passively Q-switched laser pulses.

Heat transfer unit for internal combustion engine and heat transfer unit for machine oil circulation of internal combustion engine

FUEL COMBUSTION DEVICE

PURPOSE: To prevent over rich of mixture gas and adhesion of tar in a combustion heater for bath by arranging a fuel holding member, fuel lead-in path and air lead-in path at the outside of firing glow plug. CONSTITUTION: Upon supply through a pipe 1, fuel is distributed uniformly onto the outercircumference of glow plug 4 and held through a tubular member 3 made of metal mesh or porous metal. Then it will start evaporation through a heat producing member 4a to feed a portion of air 6 fed through a fan 7 and a duct 5 into a plug holder 2 thus to produce proper mixture gas to be fired. The flame will develop sequentially through air 16 fed through the fan 7. Consequently, over rich of mixture gas can be prevented resulting in reduction of adhesion of tar or carbon. COPYRIGHT: (C)1985,JPO&Japio ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

To provide a control device for an internal combustion engine that can optimally control a plasma ignition operation independent of fuel type. In a control device of an internal combustion engine which controls plasma ignition operation for causing volume ignition of air fuel mixture by plasma in a combustion chamber a fuel type detection part detects a type of fuel to be supplied to the combustion chamber According to the detected fuel type, a state of plasma or a state of air fuel mixture in the combustion chamber is controlled. 1. A control device for an internal combustion engine , for controlling a plasma ignition operation to cause volume ignition of air fuel mixture by plasma in a combustion chamber of the internal combustion engine , comprising a fuel type detection unit that detects a type of fuel to be supplied to the combustion chamber , andwherein the control device adjusts a state of the plasma or a state of the air fuel mixture in the combustion chamber according to the detected fuel type that has been detected by the fuel type detection unit during the plasma ignition operation.2. The control device for an internal combustion engine according to claim 1 , further comprising an air fuel ratio control unit that controls air fuel ratio of the air fuel mixture in the combustion chamber according to the detected fuel type during the plasma ignition operation.3. The control device for an internal combustion engine according to claim 2 , further comprising a plasma control unit that claim 2 , during the plasma ignition operation claim 2 , changes input energy for generating the plasma based on an operation state of the internal combustion engine claim 2 , and adjusts an air fuel ratio of flammability limit of air fuel mixture to a value that maximizes fuel consumption rate in the operation state claim 2 , wherein the air fuel ratio control unit controls the air fuel ratio of the air fuel mixture in the combustion chamber during the plasma ignition operation ...

LASER SPARK PLUG

A laser spark plug device for an internal combustion engine includes a prechamber for receiving an ignitable medium and at least one overflow channel providing a fluid connection between an internal space of the prechamber and an external space surrounding the prechamber. The at least one overflow channel is configured such that when a fluid flows through the overflow channel into the internal space of the prechamber, the result is a fluid flow having at least one eddy which rotates on an eddy axis forming an angle of more than approximately 45° with a longitudinal axis of the laser spark plug device. 110-. (canceled)11. A laser spark plug device for an internal combustion engine , comprising:a prechamber configured to receive an ignitable medium; andat least one overflow channel configured to provide a fluid connection between an internal space of the prechamber and an external space surrounding the prechamber, wherein the at least one overflow channel is configured in such a way that when a fluid flows through the overflow channel into the internal space of the prechamber a fluid flow having at least one eddy is generated in the internal space of the prechamber, the at least one eddy rotating on an eddy axis forming an angle of more than approximately 45° with a longitudinal axis of the laser spark plug device;wherein a plurality of overflow channels are provided, and wherein longitudinal axes of at least three overflow channels intersect at a point of intersection located in the internal space of the prechamber.12. The laser spark plug device as recited in claim 11 , wherein the point of intersection lies in a radially outer region of the internal space of the prechamber.13. The laser spark plug device as recited in claim 11 , wherein openings of the at least three overflow channels facing the external space surrounding the prechamber and having the longitudinal axes intersecting at the point of intersection in the internal space of the prechamber are at least ...

Laser-induced spark ignition for an internal combustion engine

A laser spark plug for an internal combustion engine, including at least one generating arrangement for at least one of guiding, shaping and generating laser radiation, further including a combustion chamber window and a housing, in which the housing has, on the opposite side of the combustion chamber window from the at least one generating arrangement, in particular at an end of the housing on the combustion chamber side, an aperture for the passage of the laser radiation that is at least one of guided, shaped and generated by the at least one generating arrangement into a combustion chamber, the aperture having on the side thereof remote from the combustion chamber window an exit cross-section of 78 mmor less, especially 19 mmor less. 113-. (canceled)14. A laser spark plug for an internal combustion engine , comprising:at least one generating arrangement to at least one of guide, shape and generate laser radiation; anda housing and a combustion chamber window;{'sup': '2', 'wherein the housing has, on an opposite side of the combustion chamber window from the generating arrangement, at an end of the housing on a combustion chamber side, an aperture for a passage of the laser radiation that is at least one of guided, shaped and generated by the at least one generating arrangement into a combustion chamber, and wherein the aperture has on the side thereof remote from the combustion chamber window an exit cross-section of 78 mmor less.'}15. The laser spark plug of claim 14 , wherein the orifice cross-section of the aperture is 7 mmor less.16. The laser spark plug of claim 14 , wherein the orifice cross-section of the aperture is 0.05 mmor more.17. The laser spark plug of claim 14 , wherein the length of the aperture is 4 mm or more.18. The laser spark plug of claim 14 , wherein an internal contour of the aperture has claim 14 , in a region that is spaced both from the end of the aperture toward the combustion chamber and from the end of the aperture remote from the ...

LASER-INDUCED SPARK IGNITION FOR AN INTERNAL COMBUSTION ENGINE

A laser spark plug for an internal combustion engine has at least one laser unit for guiding, shaping, and/or for producing laser radiation, a combustion chamber window, and a housing which has, at the side of the combustion chamber window situated opposite the laser unit, a screen for the passage of the laser radiation guided, shaped, and/or produced by the laser unit into a combustion chamber, the screen having a first end facing the combustion chamber and a second end facing away from the combustion chamber, the inner contour of the screen having an extremal cross-section in a region that is situated at a distance both from the first and second ends. 19-. (canceled)10. A laser spark plug for an internal combustion engine , comprising:at least one laser unit for at least one of producing, shaping, and guiding laser radiation;a combustion chamber window; anda housing having a screen at an end of the housing on the combustion chamber side, the screen being on the opposite side of the combustion chamber window from the laser unit, wherein the screen facilitates passage of the laser radiation from the laser unit into a combustion chamber, and wherein the screen has a first end facing the combustion chamber and a second end facing away from the combustion chamber, an inner contour of the screen having an extremal cross-section in a region situated at a distance both from the first end of the screen facing the combustion chamber and from the second end of the screen facing away from the combustion chamber.11. The laser spark plug as recited in claim 10 , wherein:the screen has an entry cross-section at the second end facing away from the combustion chamber and an exit cross-section at the first end facing the combustion chamber;the extremal cross-section is one of (i) at least 10% smaller than the entry cross-section and at least 10% smaller than the exit cross-section, or (ii) at least 10% larger than the entry cross-section and at least 10% larger than the exit cross- ...

LASER-INDUCED SPARK IGNITION FOR AN INTERNAL COMBUSTION ENGINE

Laser spark plug for an internal combustion engine has at least one laser unit for guiding, shaping and/or generating laser radiation, further including a combustion chamber window, and a housing which has, on the opposite side of the combustion chamber window from the laser unit, an aperture for the passage of the laser radiation guided, shaped and/or generated by the laser unit into a combustion chamber, the length of the aperture being 4 mm or more. 115-. (canceled)16. A laser spark plug for an internal combustion engine , comprising:at least one laser unit for at least one of producing, shaping, and guiding laser radiation;a combustion chamber window; anda housing having an aperture at an end of the housing on the combustion chamber side, the aperture being on the opposite side of the combustion chamber window from the laser unit, wherein the aperture facilitates passage of the laser radiation from the laser unit into a combustion chamber, and wherein the aperture has a length of at least 4 mm.17. The laser spark plug as recited in claim 16 , wherein the length of the aperture is at least 8 mm.18. The laser spark plug as recited in claim 16 , wherein the length of the aperture is no greater than 20 mm.19. The laser spark plug as recited in claim 18 , wherein the portion of the housing defining the aperture is at least partly formed by a material with a thermal conductivity of at least 60 W/(m*K).20. The laser spark plug as recited in claim 18 , wherein the aperture has at least one cooling channel.21. The laser spark plug as recited in claim 18 , wherein a gap is provided in front of the combustion chamber window on the combustion chamber side claim 18 , and wherein the height of the gap is no greater than 1 mm.22. The laser spark plug as recited in claim 18 , wherein on the side of the aperture away from the combustion chamber window claim 18 , the aperture has an orifice cross-section no greater than 78 mm.23. The laser spark plug as recited in claim 18 , ...

COOLING DEVICE FOR A LASER SPARK PLUG

A cooling device for a laser spark plug. The cooling has a radially inner first contact area which is developed to establish a thermal contact to a housing of the laser spark plug via at least one first radially inner contact surface. The cooling device also has a radially outer second contact area which is developed to establish a thermal contact to a heat sink, in particular to an inner wall of a spark plug hole receiving the laser spark plug, via at least one first radially outer contact surface. A connector is provided, which is developed to establish a thermal contact between the first contact area and the second contact area. The cooling device is developed at least in part elastically in order to allow for a relative movement in a generally radial direction between at least the first contact surface and the second contact surface. 113-. (canceled)14. A cooling device for a laser spark plug , comprising:a radially inner first contact area which is configured to establish a thermal contact to a housing of the laser spark plug via at least one first radially inner contact surface;a radially outer second contact area which is configured to establish a thermal contact to an inner wall of a spark plug hole receiving the laser spark plug via at least one first radially outer contact surface; anda connector to establish a thermal contact between the first contact area and the second contact area;wherein the cooling device is at least in part elastic to allow for a relative movement in a radial direction between at least the first contact surface and the second contact surface.15. The cooling device as recited in claim 14 , wherein the first contact area has at least in part one of a hollow-cylindrical shape or a conical basic shape.16. The cooling device as recited in claim 14 , wherein a radially outer contact surface of the second contact area is greater than or equal to a radially inner contact surface of the first contact area.17. The cooling device as recited in ...

LASER IGNITION SYSTEM

A laser ignition system that is mounted on an internal combustion engine and that condenses a laser beam oscillated from a laser oscillator into an engine combustion chamber by using a condenser lens to generate a flame kernel with high energy and to perform ignition includes at least a highly-refractive optical element that refracts optical axes OPXto OPXof plural laser beams oscillated from plural semiconductor lasers - to -through a resonator to change traveling directions of the laser beams and a condenser device that condenses the laser beams refracted by the highly-refractive optical element on plural positions FPto FPin the engine combustion chamber. 18-. (canceled)9. A laser ignition system that is mounted on an internal combustion engine and that condenses a laser beam oscillated from a laser oscillator into an engine combustion chamber by using a condenser lens to generate a flame kernel with high energy and to perform ignition , comprising:a highly-refractive optical element that refracts optical axes of a plurality of laser beams, which are oscillated from a plurality of semiconductor lasers through a resonator, to change traveling directions of the laser beams to directions in which the laser beams get away from a central axis; anda condenser device that condenses the laser beams refracted by the highly-refractive optical element on a plurality of positions in the engine combustion chamber,wherein a plurality of excitation beams are incident on the resonator, in which a total reflecting mirror, a laser medium, a saturable absorber, and a partial reflecting mirror are formed as a unified body, to cause a plurality of pulse laser beams to exit from the resonator, andwherein an optical system enlarging a radiation angle of a latter laser beam of each laser, the highly-refractive optical element refracting the laser beams, the condenser lens, and a reinforcing glass are housed in a single chassis to condense the plurality of laser beams into the engine ...

LASER IGNITION PLUG WITH AN ANTECHAMBER

A laser ignition plug includes an antechamber into which the laser ignition plug is configured to irradiate laser radiation. The antechamber defines at least two overflow ducts that realize a fluid connection between the antechamber and a spatial region surrounding the antechamber. The at least two overflow ducts, with regard to one or more of (i) the radial spacing thereof from a longitudinal axis of the antechamber, (ii) the axial spacing thereof from an end region, which faces toward the combustion chamber, of the antechamber, and (iii) the alignment and/or geometry thereof, are arranged asymmetrically with respect to the longitudinal axis of the antechamber. 1. A laser ignition plug , comprising:an antechamber into which the laser ignition plug is configured to irradiate laser radiation,wherein the antechamber defines at least two overflow ducts, which form a fluid connection between the antechamber and a chamber region surrounding the antechamber, andwherein the at least two overflow ducts, with regard to one or more of (i) the radial spacing thereof from a longitudinal axis of the antechamber, (ii) the axial spacing thereof from an end region, which faces the combustion chamber, of the antechamber, and (iii) the alignment and/or geometry thereof, are arranged and/or configured asymmetrically with respect to the longitudinal axis of the antechamber.2. The laser ignition plug as claimed in claim 1 , wherein a cross-section of at least one overflow duct along a longitudinal axis of the overflow duct has one or more of different cross-sectional areas and/or cross-sectional shapes.3. The laser ignition plug as claimed in claim 1 , wherein at least one overflow duct has the geometry of a cone.4. The laser ignition plug as claimed in claim 1 , wherein the overflow ducts have geometries which at least partially differ from one another.5. The laser ignition plug as claimed in claim 1 , wherein a second cross-sectional area of at least one second overflow duct is ...

LASER IGNITION APPARATUS

In a laser ignition apparatus, a focusing optical element is configured to focus a pulsed laser light to a predetermined focal point in a combustion chamber of an engine. An optical window member is arranged on the combustion chamber side of the focusing optical element so as to separate the focusing optical element from the combustion chamber. A catoptric-light focal point, at which a catoptric light is to be focused, is positioned on the anti-combustion chamber side of a combustion chamber-side end surface of the optical window member. The catoptric light results from the reflection of the pulsed laser light by a pseudo mirror that is formed by the optical window member when the combustion chamber-side end surface thereof is fouled with contaminants. Further, the catoptric-light focal point falls in a region where no solid material forming either the focusing optical element or the optical window member exists. 1. A laser ignition apparatus comprising:an excitation light source configured to output an excitation light;a regulating optical element configured to regulate the excitation light outputted from the excitation light source;a laser resonator configured to generate, upon introduction of the regulated excitation light from the regulating optical element thereinto, a pulsed laser light and output the generated pulsed laser light;an enlarging optical element configured to enlarge the beam diameter of the pulsed laser light outputted from the laser resonator and output the beam diameter-enlarged pulsed laser light;a focusing optical element configured to focus the beam diameter-enlarged pulsed laser light outputted from the enlarging optical element to a predetermined focal point in a combustion chamber of an engine, thereby igniting an air-fuel mixture in the combustion chamber; andan optical window member arranged on a combustion chamber side of the focusing optical element so as to separate the focusing optical element from the combustion chamber, the ...

LASER IGNITION DEVICE FOR AN INTERNAL COMBUSTION ENGINE AND OPERATING METHOD THEREFOR

A laser ignition device for an internal combustion engine, having a laser device, which has a laser-active solid body and a passive Q-switch, and having a pump light source for optically pumping the laser device. The pump light source has a plurality of surface-emitting semiconductor lasers. 114-. (canceled)15. A laser ignition device for an internal combustion engine , comprising:a laser device having a laser-active solid body and a passive Q-switch; anda pump light source to optically pump the laser device, the pump light source including a plurality of surface-emitting semiconductor lasers.16. The laser ignition device as recited in claim 15 , further comprising:a light-conducting device via which pump radiation generated by the pump light source is radiated into the laser device.17. The laser ignition device as recited in claim 16 , wherein the light-conducting device has one of the following shapes: cone claim 16 , prism claim 16 , cuboid claim 16 , pyramid claim 16 , or cylinder.18. The laser ignition device as recited in claim 16 , wherein the light-conducting device is at least partially formed from at least one of glass claim 16 , crystalline claim 16 , and ceramic material.19. The laser ignition device as recited in claim 16 , wherein the light-conducting device contacts at least one of the pump light source and the laser device claim 16 , one of directly or with the aid of a contact medium.20. The laser ignition device as recited in claim 15 , wherein the pump light source includes a plurality of surface-emitting semiconductor lasers arranged spatially separated from one another in groups of semiconductor lasers claim 15 , and pump radiation generated by the groups of semiconductor lasers is radiated one of directly or via focusing optics claim 15 , into the laser device.21. The laser ignition device as recited in claim 15 , wherein the pump light source has multiple pump light units claim 15 , a first pump light unit being situated and designed in such a ...

laser spark plug and method for operating same

A laser spark plug for an internal combustion engine having a laser device, which includes a laser-active solid and a passive Q-switch, and having a pumped light source, which is configured to generate pumped radiation and to irradiate it onto the laser device. The pumped light source has a plurality of individual pumped light emitters at least two pumped light emitters each being activatable separately from one another. 113-. (canceled)14. A laser spark plug for an internal combustion engine , comprising:a laser device, which includes a laser-active solid and a passive Q-switch; anda pumped light source to generate pumped radiation and to irradiate it onto the laser device;wherein the pumped light source has a plurality of individual pumped light emitters, including at least two pumped light emitters each being activatable separately from one another.15. The laser spark plug of claim 14 , wherein the pumped light emitters are situated on an essentially planarly configured heat sink16. The laser spark plug of claim 14 , wherein the pumped light emitters are situated essentially in a matrix-like manner.17. The laser spark plug of claim 14 , wherein the pumped light emitters are essentially situated along multiple virtual concentric circular ring areas.18. The laser spark plug of claim 14 , wherein the pumped light emitters are essentially situated along at least one virtual spiral line.19. The laser spark plug of claim 17 , wherein multiple pumped light emitters claim 17 , which are situated on the same virtual circle or a predefinable longitudinal section of the spiral line claim 17 , are connected to one another to form an emitter group whose pumped light emitters are activatable jointly via a control connection of the emitter group.20. The laser spark plug of claim 14 , wherein the individual pumped light emitters or groups of pumped light emitters are assigned microlenses to collimate the pumped radiation.21. The laser spark plug of claim 14 , wherein the pumped ...

IGNITION SYSTEM AND OPERATING METHOD FOR SAME

An ignition system is described, in particular for an internal combustion engine of a motor vehicle, having a laser spark plug, a pump module for supplying the laser spark plug with pump radiation, and an optical fiber device for transmitting the pump radiation from the pump module to the laser spark plug. At least two separate signal transmission devices which each extend at least partially along the optical fiber device, and an evaluation unit, which is designed to act on each of the signal transmission devices with a test signal, to evaluate a response signal of the signal transmission devices which results from the particular test signal, and from the response signal to deduce an operating state of the corresponding signal transmission device, are provided. 115-. (canceled)16. An ignition system for an internal combustion engine of a motor vehicle , comprising:a laser spark plug;a pump module to supply the laser spark plug with pump radiation;an optical fiber device to transmit the pump radiation from the pump module to the laser spark plug;at least two separate signal transmission devices which each extend at least partially along the optical fiber device; andan evaluation unit to act on each of the signal transmission devices with a test signal, evaluate a response signal of the signal transmission devices which results from the particular test signal, and deduce from the response signal an operating state of the corresponding signal transmission device.17. The ignition system as recited in claim 16 , wherein a first one of the signal transmission devices has at least one first electrical transmission path between the evaluation unit and an area of a housing of the laser spark plug which is connected to an electrical reference potential of a target system when the laser spark plug is installed in the target system.18. The ignition system as recited in claim 17 , wherein the target system is a cylinder head of an internal combustion engine.19. The ignition ...

LASER IGNITION DEVICE FOR AN INTERNAL COMBUSTION ENGINE

A laser ignition device for an internal combustion engine, encompassing an ignition laser having a combustion chamber window, such that until startup of the laser ignition device, the combustion chamber window is equipped with a protective layer. 116-. (canceled)17. A laser ignition device for an internal combustion engine , comprising:an ignition laser having a combustion chamber window, wherein until startup of the laser ignition device, the combustion chamber window is equipped with a protective layer.18. The laser ignition device as recited in claim 17 , wherein the protective layer combusts upon startup of the laser ignition device.19. The laser ignition device as recited in claim 17 , wherein the protective layer absorbs a laser pulse.20. The laser ignition device as recited in claim 17 , wherein the protective layer is transparent to a laser pulse.21. The laser ignition device as recited in claim 17 , wherein the protective layer is made of an absorbent material.22. The laser ignition device as recited in claim 17 , wherein the protective layer is made of a dirt-repelling material.23. The laser ignition device as recited in claim 17 , wherein the protective layer is made of an elastic material.24. The laser ignition device as recited in claim 17 , wherein the protective layer is applied as a liquid.25. The laser ignition device as recited in claim 17 , wherein an aperture stop is disposed between the protective layer and the combustion chamber window.26. The laser ignition device as recited in claim 17 , wherein the protective layer is disposed at an ignition point.27. The laser ignition device as recited in claim 17 , wherein the protective layer is curved.28. The laser ignition device as recited in claim 17 , wherein the protective layer is integrated into an end cap.29. A protective layer for covering a combustion chamber window of a laser ignition device claim 17 , comprising at least one of a metal foil claim 17 , plastic film claim 17 , paper claim 17 , ...

PLASMA DEVICE

In a plasma device that emits an electromagnetic wave to a combustion chamber of an engine so as to generate electromagnetic wave plasma thereby igniting mixture gas, fuel efficiency for lean burn mixture combustion of an engine is improved. During a flame propagation after the mixture gas is ignited in the combustion chamber, the electromagnetic wave is emitted to the combustion chamber so that electrons in a propagating flame resonate with the electromagnetic wave. The resonance between the electrons in the propagating flame and the electromagnetic wave increases flame propagation speed. 1. A plasma device , comprising:an electromagnetic wave emission unit that emits an electromagnetic wave to a combustion chamber of an engine, whereinthe plasma device causes the electromagnetic wave emission unit to emit the electromagnetic wave to the combustion chamber so as to generate electromagnetic wave plasma at a timing of igniting mixture gas in the combustion chamber, thereby igniting the mixture gas, andthe plasma device further comprises a flame acceleration unit that controls the electromagnetic wave emission unit to emit the electromagnetic wave to the combustion chamber during a flame propagation after the mixture gas is ignited so that electrons in the propagating flame resonate with the emitted electromagnetic wave, thereby increasing flame propagation speed.2. The plasma device according to claim 1 , whereinthe flame acceleration unit controls, during the flame propagation, the electromagnetic wave emission unit to emit an electromagnetic wave of a frequency configured in view of a frequency of plasma oscillation on a propagating flame surface so that the plasma oscillation resonates with the emitted electromagnetic wave.3. The plasma device according to claim 1 , whereinthe flame acceleration unit, at a time when the propagating flame passes through a predetermined acceleration location during the flame propagation, causes the electromagnetic wave emission unit ...

PLASMA GENERATION DEVICE AND INTERNAL COMBUSTION ENGINE

In a plasma generation device that generates electromagnetic wave plasma by emitting electromagnetic waves in a target space, the electromagnetic wave plasma is generated in a plurality of locations with a simple configuration and relatively low electromagnetic wave energy. The plasma generation device is provided with an antenna that emits electromagnetic waves supplied from an electromagnetic wave generator in the target space, a discharger that forcibly discharges free electrons from gas molecules in the target space, and an electric field concentration member that concentrates electric field of the electromagnetic wave emitted from the antenna. The electric field concentration member is arranged in non-contact relationship with the antenna. The plasma generation device causes the discharger to discharge free electrons and the antenna to emit electromagnetic waves, thereby generating electromagnetic wave plasma in the vicinity of the antenna and in the vicinity of the electric field concentration member. 1. A plasma generation device , comprising:an electromagnetic wave generator that generates an electromagnetic wave;an antenna that emits the electromagnetic wave supplied from the electromagnetic wave generator in a target space;an electron discharge unit that forcibly discharges free electrons in the target space; andan electric field concentration member arranged in non-contact relationship with the antenna in the target space so as to concentrate electric field of the electromagnetic wave emitted from the antenna, whereinthe electron discharge unit forcibly discharges free electrons, and the antenna simultaneously emits the electromagnetic wave, thereby generating electromagnetic wave plasma in the vicinity of the antenna and in the vicinity of the electric field concentration member.2. The plasma generation device according to claim 1 , whereinthe electric field concentration members are provided in plural so as to surround the antenna.3. The plasma ...

LASER IGNITION DEVICE

A laser ignition device for igniting an air-fuel mixture in an auxiliary combustion chamber comprises a target unit arranged within the auxiliary combustion chamber and a laser light source , arranged on the outside of the combustion chamber , for emitting laser light L for irradiating the target unit . The laser light source is a microchip laser. 1. A laser ignition device for igniting an air-fuel mixture in a combustion chamber , the laser ignition device comprising:a target unit arranged within the combustion chamber; anda laser light source, arranged on the outside of the combustion chamber, for emitting laser light for irradiating the target unit;wherein the laser light source is a microchip laser.2. A laser ignition device according to claim 1 , further comprising an optical system for adjusting an intensity range of the laser light adapted to generate a plasma for igniting the air-fuel mixture in the target unit and a converging position of the laser light.3. A laser ignition device according to claim 2 , wherein the optical system adjusts the intensity range and converging position such that the intensity range includes the target unit while the converging position is located in front of the target unit. The present invention relates to a laser ignition device for igniting an air-fuel mixture in a combustion chamber.Laser ignition devices which fire air-fuel mixtures in combustion chambers by using laser light have been attracting attention as devices for improving the efficiency of gas engines. For example, Patent Literature 1 discloses a laser ignition device of a target breakdown type which converges laser light at a solid-state target placed on the upper face of a piston of an engine, so as to generate plasmas, thereby igniting an air-fuel mixture in a combustion chamber. Patent Literature 2 discloses a laser ignition device of a gas breakdown type which converges laser light at an air-fuel mixture, so as to ignite it.However, the laser ignition device ...

INTERNAL COMBUSTION ENGINE

In an internal combustion engine that causes a predetermined gas flow in a combustion chamber, discharge plasma generated by a discharge device is caused to effectively absorb energy of an electromagnetic wave emitted from an electromagnetic wave emission device. At a time when a discharge operation and an emission operation are simultaneously performed so as to ignite a fuel air mixture, an emitting position of the electromagnetic wave on an antenna during the emission operation is located downstream of the discharge gap in a direction of the gas flow at the discharge gap so as to face toward the discharge plasma that has been drifted due to the gas flow. 1. An internal combustion engine comprising:an internal combustion engine main body configured to produce a predetermined gas flow in a combustion chamber;a discharge device that generates discharge plasma at a discharge gap located in the combustion chamber; andan electromagnetic wave emission device including an electromagnetic wave oscillator that oscillates an electromagnetic wave, and an antenna for emitting the electromagnetic wave supplied from the electromagnetic wave oscillator to the combustion chamber, whereinthe internal combustion engine that simultaneously performs a discharge operation of causing the discharge device to generate the discharge plasma and an emission operation of emitting the electromagnetic wave from the antenna by driving the electromagnetic wave oscillator, thereby supplying the discharge plasma with energy of the electromagnetic wave so as to ignite fuel air mixture in the combustion chamber, andthe electromagnetic wave emission device is configured such that an emitting position of the electromagnetic wave on the antenna during the emission operation is located downstream of the discharge gap in a direction of the gas flow at the discharge gap so as to face toward the discharge plasma that has been drifted due to the gas flow.2. The internal combustion engine according to claim 1 ...

LASER IGNITION DEVICE

A laser ignition device includes a laser oscillation optical system that produces pulsed laser light, a condensing optical element that condenses the pulsed laser light into a combustion chamber, a housing that internally contains the condensing optical element, and an optical window that is provided distally with respect to the condensing optical element in the housing and transmits the pulsed laser light. The pulsed laser light is shaped as a ring around an optical axis at least at a light passage position in the optical window. 1. A laser ignition device comprising:a laser oscillation optical system configured to produce pulsed laser light;a condensing optical element configured to condense the pulsed laser light into a combustion chamber;a housing internally containing the condensing optical element; andan optical window provided distally with respect to the condensing optical element in the housing and configured to transmit the pulsed laser light, whereinthe pulsed laser light is shaped as a ring around an optical axis at least at a light passage position in the optical window,the laser oscillation optical system includes an axicon lens configured to transform incident light into outgoing light shaped as a ring around the optical axis,the laser oscillation optical system includes an excitation light source configured to generate excitation light, the axicon lens configured to receive and transform the excitation light into the ring-shaped outgoing light, a collimator lens configured to transform the outgoing light into collimated light parallel with the optical axis, and a laser resonator configured to be excited by the excitation light received as the collimated light to emit the pulsed laser light, andthe laser resonator includes an inert medium formed in an area including the optical axis and a cylindrical medium formed around an outer periphery of the inert medium and higher in refractive index than the inert medium, and the pulsed laser light undergoes ...

METHOD AND SYSTEM FOR LASER IGNITION CONTROL

Methods and systems are provided for closed-loop adjusting a laser intensity of a laser ignition device of a hybrid vehicle. The laser intensity applied over consecutive laser ignition events is decreased until a flame quality is degraded for a threshold number of cylinder combustion events. The laser intensity is then increased to improve flame quality and the closed-loop adjustment is reiterated. 1. An engine method , comprising:dynamically adjusting a laser intensity of an engine laser ignition device during a cylinder ignition event based on a monitored cylinder flame quality.2. The method of claim 1 , wherein the dynamically adjusting includes claim 1 , at each ignition event claim 1 , decreasing the laser intensity until the monitored cylinder flame quality is degraded over a threshold number of consecutive ignition events claim 1 , and then increasing the laser intensity.3. The method of claim 2 , wherein decreasing the laser intensity includes step-wise decreasing the laser intensity over each ignition event with a first factor based on engine load.4. The method of claim 3 , wherein increasing the laser intensity includes step-wise increasing the laser intensity over each ignition event with a second factor based on engine load.5. The method of claim 4 , wherein the first factor applied during the decreasing is larger than the second factor applied during the increasing.6. The method of claim 5 , further comprising claim 5 , after increasing the laser intensity claim 5 , reducing the first factor and repeating the decreasing the laser intensity until the monitored cylinder flame quality is degraded with the reduced first factor.7. The method of claim 5 , further comprising claim 5 , in response to a rate of increase in engine load being larger than a threshold claim 5 , increasing the second factor or decreasing the first factor.8. The method of claim 2 , wherein decreasing the laser intensity includes decreasing a current of the laser ignition device during ...

HIGHLY EFFICIENT LASER IGNITION DEVICE

A highly efficient laser ignition device is provided. The highly efficient laser ignition device fundamentally includes: a pumping light source adopting a multi-chip single emitter-packaged optical fiber output laser diode; a laser medium to which ytterbium is added; and a saturated absorber as a passive Q-switch medium, wherein a pulse of 100-999 ps as the passive Q-switch laser output can be obtained. According to the disclosed, the problems of high cost/low efficiency/low reliance/non-uniformity, which are disadvantages for replacing an ignition device using an electric spark with a laser ignition device, can be solved. 1. A highly efficient laser ignition device comprising:(a) a pumping light source including a multi-chip single emitter-packaged optical fiber output laser diode;(b) a laser medium to which ytterbium (Yb) is added; and(c) a saturable absorber used as a passive Q-switch medium,wherein a 100 to 999 picosecond pulse is obtained as a laser output of the passive Q-switch medium.2. The highly efficient laser ignition device of claim 1 , wherein:the laser diode has a wavelength band of 900 to 990 nm; andthe saturable absorber includes a chromium-doped yttrium aluminium garnet (Cr:YAG) saturable absorber.3. The highly efficient laser ignition device of claim 1 , comprising a plurality of sets each including the components (a) to (c) claim 1 , and further comprising a multi-focused ignition point generation unit at a next stage of the saturable absorber of each set.4. The highly efficient laser ignition device of claim 1 , further comprising a reverse flowing heat blocking unit. This application claims priority to PCT Application No. PCT/KR2016/000263 having a filing date of Jan. 12, 2016, based off of KR 10-2015-0009263 having a filing date of Jan. 20, 2015, the entire contents of which are hereby incorporated by reference.The following relates to a laser ignition device used for igniting an internal combustion engine of a vehicle or the like, and more ...

LASER SPARK PLUG

A laser spark plug for an internal combustion engine, in particular for a gas engine, comprising a laser crystal integrated into the laser spark plug and a combustion chamber optical means, wherein laser light pulses issuing from the laser crystal can be coupled by way of the combustion chamber optical means into a combustion chamber of the internal combustion engine, an optical laser light sensor being integrated into the laser spark plug, wherein the combustion chamber optical means is provided with a reflection surface which faces towards the laser light sensor—and is preferably curved—and is provided with a reflective mirroring, wherein at least a part of a laser light reflected at the reflection surface during the duration of a laser light pulse can be detected by the laser light sensor. 1. A laser spark plug for an internal combustion engine , in particular for a gas engine , comprising a laser crystal integrated into the laser spark plug and a combustion chamber optical means , wherein laser light pulses issuing from the laser crystal can be coupled by way of the combustion chamber optical means into a combustion chamber of the internal combustion engine , an optical laser light sensor being integrated into the laser spark plug , characterised in that the combustion chamber optical means is provided with a reflection surface which faces towards the laser light sensor—and is preferably curved—and is provided with a reflective mirroring , wherein at least a part of a laser light reflected at the reflection surface during the duration of a laser light pulse can be detected by the laser light sensor.2. A laser spark plug as set forth in characterised in that the combustion chamber optical means includes a convergent lens claim 1 , wherein the convergent lens is provided with the reflection surface claim 1 , preferably in the edge region of the convergent lens.3. A laser spark plug as set forth in characterised in that an optical aperture is connected upstream of ...

PULSED POWER SYSTEMS AND METHODS

A system and method for providing pulsed power to improve performance efficiency. In one approach, pulsed power is employed to improve fuel efficiency and power of an engine. The system and method can involve a transient plasma plug assembly intended to replace a traditional spark plug. Alternatively, an approach involving a pulse generator and a nanosecond, high voltage pulse carrying ignition cable is contemplated. 1. A method for igniting air-fuel mixtures , comprising:generating a fast rising voltage pulse;creating a plurality of plasma streamers;coupling the plasma streamers with an air-fuel mixture to create reactive species enhancing efficiency of combination chemistry.2. The method of claim 1 , further comprising providing a transient plasma plug assembly that generates the fast rising voltage pulse which creates the plasma streamers.3. The method of claim 2 , wherein the transient plasma plug includes built-in circuitry.4. The method of claim 3 , wherein the built-in circuitry includes a diode.5. The method of claim 3 , wherein the built-in circuitry includes a plurality of capacitors.6. The method of claim 1 , further comprising providing a compression line circuit that generates the fast rising voltage pulses cooperating to create the plasma streamers.7. The method of claim 6 , further comprising an ignition cable configured to transmit the fast rising voltage pulses generated by the compression line circuit.8. The method of claim 7 , wherein the ignition cable carries forward and return current such that peak electronic and magnetic fields are fixed over a length of the cable and includes electrical isolation for fixing effective capacitance.9. The method of claim 7 , wherein the cable is balanced and includes a third conductor.10. The method of claim 1 , further comprising producing the pulse of a nanosecond duration.11. A system for igniting air-fuel mixtures of an engine claim 1 , comprising:a generator of a fast rising pulse, the generator creating a ...

ACTIVE-CONTROL RESONANT IGNITION SYSTEM

A method is disclosed for producing a corona discharge for igniting an air/fuel mixture in an internal combustion engine. An igniter is provided having a discharge tip that protrudes into a combustion zone. During a first stage of a combustion process, a first primary winding of a RF transformer is driven at a first predetermined voltage level and at a first resonant frequency that is based on a first impedance in the combustion zone prior to onset of combustion, for generating a corona discharge at the tip of the igniter. During a second stage subsequent to the first stage, a second primary winding of the RF transformer is driven at a second predetermined voltage level and at a second resonant frequency that is based on a second impedance in the combustion zone at a time that is subsequent to onset of the combustion process. 1. An ignition device for producing a corona discharge for igniting an air/fuel mixture in an internal combustion engine , comprising:a metallic tube housing;an insulator element fabricated from an insulator material and fixedly secured at a combustion end of the metallic tube housing;a coil wound onto a holder and disposed within the metallic tube housing;a filler material disposed between the coil and the metallic tube housing; and a first electrode having a first end that is connected to the coil for receiving a voltage therefrom, the first electrode extending at least part of the way through the insulator element; and', 'at least one second electrode having a first end that protrudes from a combustion-side face of the insulator element and having a second end that is embedded within the insulator element, the second end of the at least one second electrode being separated from the first electrode by the insulator material and for capacitively coupling with the first electrode to receive a drive signal therefrom, the at least one second electrode for supporting a corona discharge therefrom., 'a high voltage electrode arrangement comprising2. ...

CORONA IGNITION DEVICE AND METHOD FOR PRODUCING AN IGNITION HEAD FOR A CORONA IGNITION DEVICE

The invention relates to a corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge, comprising an insulator, a center electrode, which plugs into the insulator and carries an ignition head having a plurality of ignition tips, a coil, which is connected to the center electrode, and a housing, which surrounds the coil and into which the insulator plugs, wherein the ignition head has main body formed from sheet metal. In accordance with the invention, the ignition tips consist of a different material compared to the main body and are fastened to a side face of the main body. The invention also relates to an ignition head for such a corona ignition device and to a method for production thereof. 1. A corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge , comprising:an insulator;a center electrode surrounded by the insulator and carrying an ignition head having a plurality of ignition tips;a coil connected to the center electrode;a housing surrounding the coil and holding the insulator;wherein the ignition head has a main body formed from sheet metal and wherein the ignition tips are formed of a different material than the main body and have at least one cut edge.2. The corona ignition device according to claim 1 , wherein the ignition tips are fastened to a side face of the main body.3. The corona ignition device according to claim 1 , wherein the ignition tips are formed of a platinum metal or an alloy based on platinum metal.4. The corona ignition device according to claim 1 , further comprising an intermediate layer arranged between the ignition tips and the main body to improve the adhesion of the ignition tips to the main body.5. The corona ignition device according to claim 1 , wherein the ignition tips are formed of the different material continuously from their upper side to their lower side.6. The corona ignition device according to claim 1 , wherein the ...

CORONA IGNITION DEVICE AND METHOD FOR PRODUCING AN IGNITION HEAD FOR A CORONA IGNITION DEVICE

The invention relates to corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge, comprising an insulator, a center electrode, which plugs into the insulator and carries an ignition head having a plurality of ignition needles, and a housing, into which the insulator plugs. In accordance with the invention, the ignition needles and the center electrode plug into the ignition head. The invention also relates to a method for producing an ignition head for a corona ignition device, wherein a green compact of the ignition head is produced by injection molding of metal powder, and the green compact is sintered whilst ignition needles and/or a center electrode plug thereinto. 1. A corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge , comprising:an insulator;a center electrode, which is surrounded by the insulator and carries an ignition head having a plurality of ignition needles; anda housing, which holds the insulator;wherein the ignition needles and the center electrode are stuck in the ignition head.2. The corona ignition device according to claim 1 , wherein the ignition head is integrally bonded to the ignition needles.3. The corona ignition device according to claim 1 , wherein the ignition needles comprise a pin-shaped main body and an ignition tip welded onto the main body.4. The corona ignition device according to claim 1 , wherein the ignition tips consist of platinum metal or an alloy based on platinum metal.5. The corona ignition device according to claim 3 , wherein the ignition tips are made of wire.6. The corona ignition device according to claim 1 , wherein the ignition needles have an ignition edge running at an incline relative to their longitudinal direction.7. The corona ignition device according to claim 6 , wherein the ignition edge has an elliptical course.8. A method for producing an ignition head for a corona ignition device claim 6 , ...

CONTROL DEVICE OF PLASMA IGNITION APPARATUS AND PLASMA IGNITION APPARATUS

A control device of a plasma ignition apparatus according to an embodiment includes a plug socket, an oscillation unit, and an amplification unit. The plug socket holds an ignition plug, and a high voltage generated by an ignition coil is transmitted to the ignition plug through the plug socket. The oscillation unit oscillates a high frequency. The amplification unit amplifies the high frequency oscillated by the oscillation unit. The oscillation unit is arranged outside of the plug socket and the amplification unit is arranged inside of the plug socket. 1. A control device of a plasma ignition apparatus , the control device comprising:a plug socket that holds an ignition plug and through which a high voltage generated by an ignition coil is transmitted to the ignition plug;an oscillation unit that oscillates a high frequency; andan amplification unit that amplifies the high frequency oscillated by the oscillation unit, whereinthe oscillation unit is arranged outside of the plug socket and the amplification unit is arranged inside of the plug socket.2. The control device of the plasma ignition apparatus according to claim 1 , the control device further comprising:a high-frequency transmission path through which the high frequency amplified by the amplification unit is transmitted; andan antenna that is connected to the high-frequency transmission path, the antenna outputting the high frequency, whereinthe antenna and the high-frequency transmission path are arranged inside of the plug socket.3. The control device of the plasma ignition apparatus according to claim 2 , whereinthe antenna includes a loop antenna, andthe antenna is provided at a position at which the antenna is fitted to an outer periphery part of an insulator included in the ignition plug when the ignition plug is hold by the plug socket.4. The control device of the plasma ignition apparatus according to claim 1 , wherein an internal conductor that is arranged inside of the plug socket and through ...

FUEL INJECTION SYSTEMS WITH ENHANCED CORONA BURST

Methods, systems, and devices are disclosed for injecting and igniting a fuel using corona discharge for combustion. In one aspect, a method to ignite a fuel in an engine includes injecting ionized fuel particles into a combustion chamber of an engine, and generating one or more corona discharges at a particular location within the combustion chamber to ignite the ionized fuel particles, in which the generating includes applying an electric field at electrodes configured at a port of the combustion chamber, the electric field applied at a frequency that does not produce an ion current or spark on or between the electrodes. 1. A method to ignite a fuel in an engine , the method comprising:injecting ionized fuel particles into a combustion chamber of an engine; andgenerating one or more corona discharges at a particular location within the combustion chamber to ignite the ionized fuel particles, the generating including applying an electric field at electrodes configured at a port of the combustion chamber, the electric field applied at a frequency that does not produce an ion current or spark on or between the electrodes.2. The method of claim 1 , wherein the corona discharge initiates a combustion process of the ionized fuel particles with oxidant compounds present in the chamber.3. The method of claim 1 , wherein the electrodes include antenna structures interfaced at the port.4. The method of claim 1 , wherein the electrodes include a first electrode and a second electrode configured in a coaxial configuration at a terminal end interfaced with the port claim 1 , in which the first electrode is configured along the interior of an annular spacing between the second electrode and the first electrode includes one or more points protruding into the annular spacing.5. The method of claim 4 , wherein the second electrode includes one or more points protruding into the annular space and aligned with the one or more points of the first electrode to reduce the spacing ...

Corona ignition device

The invention relates to a corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge, comprising an insulator, which has a continuous channel, a central electrode, which plugs into the channel of the insulator and leads to at least one ignition tip, a glass seal, which seals in the channel a gap between the central electrode and the insulator, and a housing, into which the insulator plugs. In accordance with the invention, the central electrode has a sealing face, which, together with a sealing face of the insulator, forms a seat, and an annular air gap that is open towards the ignition tip is provided in an end portion of the channel, facing the ignition tip, between the central electrode and the insulator.

APPARATUS FOR OPERATING AT LEAST ONE LIGHT-EMITTING DIODE IN THE FORM OF A LASER DIODE

An apparatus operates at least one light-emitting diode in the form of a laser diode. The light-emitting diode is interconnected in series with the load section of a controllable semiconductor element and a current measuring resistor between a first supply voltage terminal and a second supply voltage terminal. The supply voltage terminals are the output connections of a voltage-regulating circuit in the form of a DC voltage boost converter which provides a supply voltage), and wherein a current-regulating circuit is provided for the current through the at least one light-emitting diode, whose actuator is the controllable semiconductor element. 1. An apparatus for operating at least one light-emitting diode in a form of a laser diode , the apparatus comprising:a current-regulating circuit for regulating a current running through the at least one light-emitting diode, said current-regulating circuit having an actuator being a controllable semiconductor element with a load section, the light-emitting diode being interconnected in series with said load section of said controllable semiconductor element;a voltage-regulating circuit having first and second supply voltage terminals being output connections of said voltage-regulating circuit, said voltage-regulating circuit being a DC voltage boost converter outputting a supply voltage; anda current measuring resistor connected between said first supply voltage terminal and said second supply voltage terminal.2. The apparatus according to claim 1 , wherein:said current-regulating circuit has a storage coil, a first regulator and a freewheeling element; andsaid current-regulating circuit is a switched buck converter, said load section of said controllable semiconductor element is interconnected in series with said storage coil between said first supply voltage terminal and an anode of the at least one light-emitting diode and said freewheeling element is connected between a connecting node between said controllable ...

LASER SPARK PLUG AND OPERATING METHOD FOR SAME

A laser spark plug, in particular for an internal combustion engine, includes a prechamber for accommodating an ignitable medium and means for applying laser radiation to an ignition point situated in the prechamber. The means are fashioned such that the laser radiation is focused onto at least one ignition point that, given a division of the prechamber into three partial regions that are approximately equal in volume and that extend axially away from an end face of the laser spark plug adjoining the prechamber and are separated from one another by imaginary planes situated essentially parallel to the end face, is situated in the partial region adjoining the end face or in a central partial region adjacent to said partial region, preferably in the partial region adjoining the end face. 111-. (canceled)12. A laser spark plug for an internal combustion engine , comprising:a prechamber adapted for accommodating an ignitable medium; anda device adapted for applying laser radiation to at least one ignition point situated in the prechamber,wherein, given a division of the prechamber into three partial regions that are approximately equal in volume, that extend axially away from an end face of the laser spark plug adjoining the prechamber, and that are separated from one another by imaginary planes situated essentially parallel to the end face, the device is adapted such that the laser radiation is focused onto the at least one ignition point that is situated in a partial region adjoining the end face or in a central partial region adjacent to the partial region adjoining the end face.13. The laser spark plug according to claim 12 , wherein a distance of the ignition point from the end face of the laser spark plug is between approximately 0 mm and approximately 15 mm claim 12 , or between approximately 0 mm and approximately 10 mm.14. The laser spark plug according to claim 13 , wherein the distance is between approximately 0 mm and approximately 5 mm claim 13 , or between ...

CORONA IGNITER FIRING END ELECTRODE TIP WITH DUAL METAL RIVETS AND METHOD OF MANUFACTURE

A firing tip for a corona igniter is provided. The firing tip includes a base formed of metal, such as nickel, and rivets formed of precious metal, such as iridium. The base includes indentations, and the rivets are disposed in the indentations of the base. The rivet has a melting point and/or wear resistance greater than the base. Typically, the indentations of the base include a concave surface and the rivets have a cylindrical shape matching the shape of the indentations. The rivets can be sharpened to a point. The rivets can include a first piece formed of precious metal and a second piece formed of nickel or nickel alloy, wherein an end of the first piece is welded to an end of the second piece, and the second piece is welded to the base. Alternatively, the rivets can be formed entirely of the precious metal. 1. A firing tip for a corona igniter , comprising:a base formed of metal and including at least one indentation,at least one rivet, each rivet disposed in one of said indentations of said base,said at least one rivet including at least one precious metal and having a melting point and/or wear resistance greater than said base.2. A firing tip according to claim 1 , wherein said base is formed of nickel or a nickel alloy claim 1 , and said at least one precious metal includes iridium or platinum.3. A firing tip according to claim 1 , wherein a plurality of said rivets are spaced equally from one another and located symmetrically around a longitudinal axis of said firing tip4. A firing tip according to claim 1 , wherein each of said at least one rivet is formed entirely of said at least one precious metal.5. A firing tip according to claim 1 , wherein each of said at least one rivet includes a first piece connected to a second piece claim 1 , said first piece is formed of said at least one precious metal claim 1 , said second piece is formed of nickel or a nickel alloy claim 1 , and said base is formed of nickel or a nickel alloy.6. A firing tip according to ...

CORONA IGNITION DEVICE

A corona ignition device for igniting fuel in an internal combustion engine by means of a corona discharge. The device comprises a center electrode, an insulator into which the center electrode is inserted, a coil body onto which a coil that is connected to the center electrode is wound, and a shielding cap which is fitted onto an end section of the coil body. The end section faces the insulator. According to this disclosure, the shielding cap comprises one or a plurality of slots. 1. A corona ignition device for igniting fuel in an internal combustion engine by means of a corona discharge , comprising:a center electrode;an insulator into which the center electrode is inserted;a coil body onto which a coil is wound, the coil being connected to the center electrode; anda shielding cap fitted onto an end section of the coil body, said end section facing the insulator;wherein the shielding cap comprises one or a plurality of slots.2. The corona ignition device according to claim 1 , wherein a section of the center electrode is formed as a pin and protrudes through a bottom of the shielding cap.3. The corona ignition device according to claim 2 , wherein the coil body carries a bush fitted onto the section of the center electrode that protrudes through the bottom of the shielding cap.4. The corona ignition device according to claim 1 , wherein the shielding cap is formed integrally with the pin which forms a section of the center electrode.5. The corona ignition device according to claim 1 , wherein the shielding cap is connected to the pin by means of interference fit.6. The corona ignition device according to claim 1 , wherein the shielding cap is welded to the pin by a weld seam which is completely arranged in the interior region of the shielding cap.7. The corona ignition device according to claim 1 , wherein the pin comprises a ring shoulder with which it is seated on the insulator.8. The corona ignition device according to claim 1 , wherein the pin comprises a ...

LASER SPARK PLUG

A laser spark plug, e.g., for an engine, includes a prechamber that accommodates an ignitable medium, an arrangement for radiating laser radiation onto an ignition point in the prechamber, at least one crossflow channel that enables a fluid connection between an internal space of the prechamber and an external space, and a screen arranged between the radiating arrangement and the prechamber with an outlet opening for entry of the laser radiation into the prechamber. The at least one crossflow channel is arranged to provide a fluid flow therethrough and into the prechamber, such that the direction of flow forms an angle of a maximum of approximately 30° with a longitudinal axis of the prechamber, and the flow is directed into a spatial region of the prechamber that is situated essentially predominantly, preferably completely, outside a central region of the outlet opening of the screen. 110-. (canceled)11. A laser spark plug comprising:a prechamber configured to accommodate an ignitable medium;an arrangement for radiating laser radiation onto at least one ignition point, which at least one ignition point is in the prechamber;at least one crossflow channel that enables a fluid connection between an internal space of the prechamber and a space that is external to the prechamber; anda screen arranged between the radiating arrangement and the internal space of the prechamber; the screen includes at least one outlet opening to the internal space of the prechamber for entry of the laser radiation into the internal space of the prechamber;', 'the at least one crossflow channel at least one of positioned and structured to cause a fluid to flow through the at least one crossflow channel and into a spatial region of the internal space of the prechamber at a direction that forms a non-zero angle of a maximum of approximately 30° relative to a longitudinal axis of the prechamber; and', 'the spatial region is situated at least predominantly outside a central region of the outlet ...

EFFICIENCY ENHANCEMENT TO A LASER IGNITION SYSTEM

Methods and systems are provided for expediting heating of intake valves to improve engine startability. An engine laser ignition system is operated prior to, and during, an engine start to heat intake valves, thereby improving fuel vaporization. The ignition system is also operated to initiate cylinder air/fuel combustion. 1. A method for an engine , comprising:operating a laser ignition device with an output that is adjusted from a level for initiating cylinder ignition, the output adjusted based on intake valve temperature.2. The method of claim 1 , wherein each of a power level claim 1 , a pulse frequency claim 1 , a focal point claim 1 , and a pulse width of the output is adjusted based on the intake valve temperature claim 1 , and wherein the adjusting includes lowering the output from the level for initiating cylinder ignition.3. The method of claim 1 , wherein the engine is coupled in a vehicle and wherein operating the laser ignition device includes operating the laser ignition device responsive to a signal for vehicle unlocking claim 1 , the operating of the laser ignition device initiated before a first combustion event in the engine.4. The method of claim 3 , further comprising claim 3 , during and after the first combustion event claim 3 , operating the laser ignition device with the output at the lower level during an intake stroke of a combustion cycle claim 3 , and operating the laser ignition device with the output at the level for initiating cylinder ignition during a power stroke of the combustion cycle.5. The method of claim 4 , wherein the intake valve temperature is modeled based on engine operating conditions including engine speed claim 4 , engine load claim 4 , and ambient temperature.6. The method of claim 5 , wherein the output of the laser ignition device is adjusted to raise the modeled intake valve temperature above a target valve temperature claim 5 , the target valve temperature based on each of engine temperature claim 5 , exhaust ...

LASER DEVICE, IGNITION SYSTEM, AND INTERNAL COMBUSTION ENGINE

A laser device is provided including a light source configured to emit light, a laser resonator which the light emitted from the light source enters, a first optical element configured to increase a divergence angle of the light emitted from the laser resonator, a second optical element configured to collimate the light whose divergence angle is increased by the first optical element, and a third optical element configured to collect and condense the light collimated by the second optical element. 1. A laser device comprising:a light source configured to emit light;a laser resonator which the light emitted from the light source enters;a first optical element configured to increase a divergence angle of the light emitted from the laser resonator;a second optical element configured to collimate the light whose divergence angle is increased by the first optical element; anda third optical element configured to collect and condense the light collimated by the second optical element.2. The laser device of claim 1 , wherein the first optical element is a concave lens.3. The laser device according to claim 1 , wherein the third optical element is movable in a light emitting direction.4. The laser device according to claim 1 , wherein the laser resonator is a Q-switched laser.5. The laser device according to claim 1 , further comprising: a transmission member disposed between the light source and the laser resonator to transmit the light from the light source to the laser resonator.6. The laser device according to claim 1 , wherein the light source is a surface emitting laser.7. The laser device according to claim 1 , wherein the laser resonator is ceramic.8. The laser device according to claim 1 , wherein the laser resonator is a composite crystal in which a laser medium and a saturable absorber are bonded together.9. The laser device according to claim 8 , whereinthe laser medium is a YAG crystal where Nd is doped, andthe saturable absorber is a YAG crystal where Cr is ...

LASER DEVICE, IGNITION SYSTEM, AND INTERNAL COMBUSTION ENGINE

A laser device is provided including a surface emitting laser array configured to emit light, an optical system disposed in an optical path of light that is emitted from the surface emitting laser, a laser resonator which the light passed through the optical system enters, where the optical system includes a first optical element configured to collimate the light emitted from the surface emitting laser, and a second optical element configured to collect and condense the light collimated by the first optical element. 1. A laser device comprising:a surface emitting laser array configured to emit light;an optical system disposed in an optical path of light that is emitted from the surface emitting laser; anda laser resonator which the light passed through the optical system enters; a first optical element configured to collimate the light emitted from the surface emitting laser, and', 'a second optical element configured to collect and condense the light collimated by the first optical element., 'wherein the optical system includes'}2. The laser device according to claim 1 , whereinthe surface emitting laser includes a plurality of light-emitting units, andthe first optical element is a microlens array including a plurality of lens units that correspond to the plurality of light-emitting units of the surface emitting laser.3. The laser device according to claim 1 , wherein the laser resonator is a Q-switched laser.4. The laser device according to claim 3 , wherein the laser resonator includes a laser medium and a saturable absorber.5. The laser device according to claim 4 , whereinthe laser medium is a YAG crystal where Nd is doped, andthe saturable absorber is a YAG crystal where Cr is doped.6. The laser device according to claim 4 , wherein the laser resonator is a composite crystal.7. The laser device according to claim 1 , wherein the laser resonator is made of ceramic.8. The laser device according to claim 1 , further comprising: a transmission member configured ...

IGNITION DEVICE FOR IGNITING FUEL/AIR MIXTURES IN A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE BY CORONA DISCHARGE

Ignition device for igniting fuel/air mixtures in a combustion chamber of an internal combustion chamber by a corona discharge. The device includes an ignition electrode and an outer conductor surrounding the ignition electrode. The outer conductor has a front end and a rear end, and comprises an electrical insulator arranged between the ignition electrode and the outer conductor, from which insulator at least one tip of the ignition electrode protrudes. The at least one tip of the ignition electrode is arranged in a space that is shielded by a cap associated with the insulator, said cap having an inner side facing the insulator and an outer side facing away from the insulator as well as one or more holes, by means of which the shielded space is connected to a space arranged on the outer side of the cap. 1. An ignition device for igniting fuel/air mixtures in a combustion chamber of an internal combustion chamber by a corona discharge , the ignition device comprising:an ignition electrode;an outer conductor surrounding the ignition electrode, the outer conductor having front and rear ends;an electrical insulator arranged between the ignition electrode and the outer conductor, at least one tip of the ignition electrode protruding from the insulator; anda cap associated with the insulator, wherein at least one tip of the ignition electrode is arranged in a space that is shielded by the cap, the cap having an inner side facing the insulator and an outer side facing away from the insulator, the cap including one or more holes connecting the shielded space to a space arranged on the outer side of the cap.2. The ignition device according to claim 1 , wherein the cap is formed of metal.3. The ignition device according to claim 2 , wherein the cap is formed of the same material as the outer conductor.4. The ignition device according to claim 2 , wherein the metal cap claim 2 , on the inner side thereof claim 2 , carries an electrically insulating layer claim 2 , at least in ...

GLOW PLUG

Described is a glow plug with a glow pencil that comprises a forward end with a glow tip and a rearward end, a housing in which the rearward end of the glow pencil is arranged and in relation to which the glow pencil is movable in its longitudinal direction, and a bellows that is connected to the housing and the glow pencil. According to this disclosure, it is provided that a forward end of the bellows is attached to the housing and a rearward end of the bellows is attached to the glow pencil. 1. A glow plug , comprising:a glow pencil having a forward end with a glow tip and a rearward end;a housing in which the rearward end of the glow pencil is arranged, the glow plug being movable in a longitudinal direction relative to the housing; anda bellows connected to the housing and the glow pencil;wherein a forward end of the bellows is attached to the housing and a rearward end of the bellows is attached to the glow pencil.2. The glow plug according to claim 1 , wherein the forward end of the bellows is attached to the housing by means of a ring or a sleeve.3. The glow plug according to claim 2 , wherein the ring or the sleeve extends into the bellows.4. The glow plug according to claim 2 , wherein the bellows is welded to the ring or the sleeve.5. The glow plug according to claim 4 , wherein the sleeve comprises a forward cylindrical section that rests against the housing in a housing opening and comprises a rearward cylindrical section that is welded to the bellows claim 4 , wherein the rearward cylindrical section has a greater wall thickness than the forward cylindrical section.6. The glow plug according to claim 2 , wherein the housing comprises a weld seam on a front face claim 2 , said weld seam connecting the housing to the ring or the sleeve.7. The glow plug according to claim 2 , wherein the ring or the sleeve has a section that tapers to the rear.8. The glow plug according to claim 1 , wherein the bellows is arranged completely in the housing.9. The glow plug ...

CORONA IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING A CORONA IGNITION SYSTEM

A corona ignition system for igniting fuel in a combustion chamber of an internal combustion engine, comprising a oscillating circuit, which contains an ignition electrode, a high-frequency generator, which is connected to the oscillating circuit, in order to produce an AC voltage to excite the oscillating circuit, a converter in order to produce an input voltage for the high-frequency generator from an on-board supply voltage, a voltage controller to stabilize the input voltage produced by the converter for the high-frequency generator, and a control unit for controlling the high-frequency generator, wherein the control unit communicates an imminent load change of the converter to the voltage regulator, before the load change occurs as a result of activation or deactivation of the high-frequency generator. A method for controlling a corona ignition system is also described. 1. A corona ignition system for igniting fuel in a combustion chamber of an internal combustion engine , comprising:an oscillating circuit containing an ignition electrode;a high-frequency generator connected to the oscillating circuit and configured to produce an AC voltage for exciting the oscillating circuit;a converter configured to produce an input voltage for the high-frequency generator;a voltage controller configured to stabilize the input voltage produced by the converter for the high-frequency generator; anda control unit configured for controlling the high-frequency generator;wherein the control unit is configured to communicate an imminent load change of the converter to the voltage controller, before the load change resulting from activation or deactivation of the high-frequency generator occurs.2. The corona ignition system according to claim 1 , wherein the control unit is configured to communicate the imminent load change to the voltage regulator two microseconds to two hundred microseconds prior to the activation or deactivation of the high-frequency generator.3. The corona ...

Internal combustion engine

To improve a propagation speed of a flame by effectively utilizing energy of the electromagnetic wave in the combustion chamber in an internal combustion engine that promotes combustion of fuel air mixture in a combustion chamber by means of an electromagnetic wave. The internal combustion engine includes, in addition to an internal combustion engine main body and an ignition device, an electromagnetic wave emission device and a control device. The electromagnetic wave emission device emits an electromagnetic wave to the combustion chamber while the flame is being propagated after ignition of the fuel air mixture. The control device controls a frequency of the electromagnetic wave emitted to the combustion chamber in view of a resonant frequency of the combustion chamber in accordance with an operation condition of the internal combustion engine main body or a propagation condition of the flame.

Photo-Ignition Torch for Combustion Initiation and Gas Generation

A photo-ignition torch is provided including a light source configured to generate at least one of ultraviolet, visible, and infrared light. A photo-ignitable sub-micron particle mix is contained in capsule configured to receive the at least one of ultraviolet, visible, and infrared light generated by the light source or alternatively the photo-ignitable sub-micron particle mix is in direct contact with the light source. The exposure of the photo-ignitable sub-micron particle mix to the at least one of ultraviolet, visible, and infrared light initiates a photo-ignition process causing a release of burning byproducts of the photo-ignition process. 1. A photo-ignition torch , comprising:an light source configured to generate at least one of ultraviolet, visible, and infrared light;a photo-ignitable sub-micron particle mix; anda transparent capsule proximate the light source and containing the photo-ignitable sub-micron particle mix,wherein the exposure of the photo-ignitable sub-micron particle mix to the at least one of ultraviolet, visible, and infrared light initiates a photo-ignition process causing a pressure increase in the transparent capsule and a release of burning byproducts of the photo-ignition process.2. The photo-ignition torch of claim 1 , wherein the exposure of the photo-ignitable sub-micron particle mix to the at least one of ultraviolet claim 1 , visible claim 1 , and infrared light initiates the photo-ignition process causing the pressure increase in the transparent capsule and the release of burning byproducts of the photo-ignition process in an environment with a pressure level in excess of 300 psi.3. The photo-ignition torch of claim 1 , wherein a temperature of the burning byproducts of the photo-ignition process is in excess of 500° C.4. The photo-ignition torch of claim 1 , further comprising:an ignition vessel encompassing the transparent capsule and the light source; andan orifice at one end of the ignition vessel,wherein the burning ...

LASER IGNITION DEVICE AND OPERATING METHOD THEREFOR

A laser ignition device for an internal combustion engine, in which the laser ignition device has at least one laser spark plug and a cooling device for temperature control, in particular cooling, of the laser spark plug. The cooling device has a cooling circuit, containing a coolant, which is thermally connectable to at least one component of the laser spark plug, a volume of the coolant contained in the cooling circuit being less than or equal to approximately 50% of a compression volume of a cylinder of the internal combustion engine, which may be less than or equal to approximately 10% of a compression volume of the cylinder of the internal combustion engine. 113-. (canceled)14. A laser ignition device for an internal combustion engine , comprising:at least one laser spark plug; anda cooling device for temperature control for cooling of the laser spark plug;wherein the cooling device has a cooling circuit, containing a coolant, which is thermally connectable to at least one component of the laser spark plug, and wherein a volume of the coolant contained in the cooling circuit is less than or equal to approximately 50% of a compression volume of a cylinder of the internal combustion engine.15. A laser ignition device for an internal combustion engine , comprising:at least one laser spark plug; anda cooling device for temperature control for cooling of the laser spark plug;wherein the cooling device has a cooling circuit containing a coolant, which is thermally connectable to at least one component of the laser spark plug, and wherein a volume of the coolant contained in the cooling circuit is less than or equal to approximately 0.1 L.16. The laser ignition device of claim 14 , wherein the cooling circuit has a first heat exchanger claim 14 , which is thermally connectable to at least one component of the laser spark plug claim 14 , the cooling circuit having a second heat exchanger which is thermally connectable to a heat sink claim 14 , and having a conveyance ...

CORONA IGNITION DEVICE

The invention relates to a corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge, said corona ignition device comprising an insulator, a center electrode, which is held in the insulator, a housing, in which the insulator is held, and coil turns, which are disposed in a cylindrical main part of the housing and are connected to the center electrode. According to an aspect of this disclosure, the housing widens on the side of the main part remote from the insulator and further coil turns are disposed there, in a wider housing part. 1. A corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge , said corona ignition device comprising:an insulator;a center electrode held in the insulator;a housing in which the insulator is held; andcoil turns, which are disposed in a cylindrical main part of the housing and are connected to the center electrode;wherein the housing widens on the side of the main part remote from the insulator to form a wider housing part, further coil turns being disposed in the wider housing part.2. The corona ignition device according to claim 1 , wherein the further coil turns have a greater diameter than the coil turns in the main part.3. The corona ignition device according to claim 1 , wherein the further coil turns are wound onto a first coil form claim 1 , which is plugged onto a second coil form onto which the coil turns in the main part are wound.4. The corona ignition device according to claim 1 , wherein the number of coil turns in the wider housing part is between one-fourth and two-thirds the total number of coil turns.5. The corona ignition device according to claim 1 , wherein the coil turns in the main part and in the wider housing part are wound with wire having a diameter of 0.3 mm to 0.6 mm.6. The corona ignition device according to claim 1 , wherein most of the coil turns in the main part have an outer diameter that is between 0. ...

LASER SPARK PLUG HAVING AN IMPROVED SEAL BETWEEN THE COMBUSTION CHAMBER WINDOW AND THE CASING

A casing for a laser spark plug, in particular, of an internal combustion engine of a motor vehicle, or of a stationary engine; the casing including at least one casing part and a combustion chamber window joined to the casing part to form a seal at least regionally; characterized in that at least one sealing element, whose coefficient of thermal expansion at an operating temperature of the laser spark plug is greater than the coefficient of thermal expansion of the casing part at the operating temperature of the laser spark plug, is provided between the casing part and the combustion chamber window. 115-. (canceled)16. A casing for a laser spark plug , comprising:a casing part;a combustion chamber window joined to the casing part to form a seal at least regionally; andat least one sealing element, whose coefficient of thermal expansion at an operating temperature of the laser spark plug is greater than the coefficient of thermal expansion of the casing part at the operating temperature of the laser spark plug, and which is between the casing part and the combustion chamber window, such that the combustion chamber window, the at least one sealing element, and the casing part are arranged, in that order, sequentially in a direction of an optical axis of the laser spark plug.17. The casing of claim 16 , wherein the coefficient of thermal expansion of the combustion chamber window at the operating temperature of the laser spark plug is less than the coefficient of thermal expansion of the casing part at the operating temperature of the laser spark plug.18. The casing of claim 16 , wherein the coefficient of thermal expansion of the combustion chamber window at the operating temperature of the laser spark plug is between approximately 4*10̂-6/K and approximately 10*10̂-6/K.19. The casing of claim 16 , wherein the coefficient of thermal expansion of the casing part at the operating temperature of the laser spark plug is between approximately 7*10̂-6/K and approximately ...

WEAR PROTECTION FEATURES FOR CORONA IGNITER

A corona igniter comprises an electrode with a central extended member extending along a central axis and a crown extending radially outwardly from the central extended member. The central extended member has an extended length and the crown has a crown length. The extended length is greater than the crown length such that the extended member approaches a piston more closely than the crown. In addition, the firing tips of the crown each present a first spherical radius which is less than a second spherical radius of the central extended member. Thus, if arcing occurs, it forms from the central extended member, rather than from the crown. Accordingly, the firing tips of the crown experience less wear and remain sharp. In addition, due to the sizes of the spherical radii, corona discharge is more likely to form from the firing tips than from the central extended member. 1. A corona igniter , comprising:an electrode extending along a central axis for emitting an electrical field that forms a corona discharge;said electrode including a central extended member extending longitudinally along said central axis to a central firing end;an insulator formed of an electrically insulating material disposed around said electrode and extending along said central axis to an insulator firing end;a shell formed of a metal material disposed around said insulator;said electrode including a crown disposed outwardly of said insulator firing end;said crown including at least one branch extending radially outwardly of said central extended member;said crown extending along said central axis from a top surface to at least one firing tip;said crown presenting a crown length between said top surface and said at least one firing tip, said crown length being parallel to said central axis;said central extended member presenting an extended length extending from said top surface of said crown to said central firing end, said extended length being parallel to said central axis; andsaid extended ...

LASER IGNITION SYSTEM BASED DIAGNOSTICS

Methods and systems are provided for using an engine laser ignition system to perform a visual inspection of an engine and diagnose various cylinder components and conditions based on engine positional measurements. Laser pulses may be emitted at a lower power level during an intake and/or exhaust stroke to illuminate a cylinder interior while a photodetector captures images of the cylinder interior. Additionally, laser pulses may be emitted at a higher power level to initiate cylinder combustion while the photodetector captures images of the cylinder interior using the light generated during cylinder combustion. 1. A method for a vehicle engine , comprising:operating a laser ignition device during an intake stroke of a cylinder at lower power; anddisplaying an in-cylinder image generated by a photodetector coupled to the cylinder following the operating on a display device of the vehicle.2. The method of claim 1 , wherein operating the laser ignition device at a lower power includes operating at a power lower than a threshold power required for initiating cylinder combustion.3. The method of claim 2 , wherein the in-cylinder image includes an image of a cylinder component being diagnosed.4. The method of claim 3 , wherein operating the laser ignition device at lower power includes directing laser pulses into the cylinder to planar sweep the cylinder during the intake stroke.5. The method of claim 4 , wherein the planar sweep is based on the cylinder component being diagnosed.6. The method of claim 4 , wherein displaying on the display device includes displaying the in-cylinder image to a vehicle operator claim 4 , the method further comprising claim 4 , displaying a reference image of the component being diagnosed on the display device to the vehicle operator.7. The method of claim 6 , further comprising claim 6 ,receiving input from the vehicle operator regarding a health of the component being diagnosed, the operator input based on the displayed in-cylinder image ...

Plasma-Distributing Structure in a Resonator System

An example system can include a radio-frequency power source, a resonator, and a plasma-distributing structure. The resonator can include an electrode having a first concentrator. The resonator can be configured to provide a plasma corona when excited by the power source with a signal having a wavelength proximate to an odd-integer multiple of one-quarter of a resonant wavelength of the resonator. The plasma-distributing structure can be arranged proximate to the plasma corona provided by the resonator and include a second concentrator. When the power source excites the resonator with the signal, an electric field can be concentrated at the first concentrator and the plasma corona can be provided proximate to the first concentrator. Further, when the plasma corona is provided proximate to the first concentrator and the plasma-distributing structure is at a predetermined voltage, an additional plasma corona can be established proximate to the second concentrator. 1. A system comprising:a radio-frequency power source; a first conductor,', 'a second conductor,', 'a dielectric between the first conductor and the second conductor, and', 'an electrode configured to be electromagnetically coupled to the first conductor and including a first concentrator, wherein the resonator is configured to provide a plasma corona proximate to the first concentrator when excited by the radio-frequency power source with a signal having a wavelength proximate to an odd-integer multiple of one-quarter (¼) of the resonant wavelength; and, 'a resonator configured to be electromagnetically coupled to the radio-frequency power source and having a resonant wavelength, the resonator includinga plasma-distributing structure including a second concentrator, the plasma-distributing structure being arranged proximate to where the plasma corona is provided by the resonator,wherein when the radio-frequency power source excites the resonator with the signal, an electric field is concentrated at the ...

COMBUSTION IGNITION DEVICES FOR AN INTERNAL COMBUSTION ENGINE

An internal combustion engine includes a combustion chamber formed by cooperation of a cylinder bore formed in a cylinder block, a cylinder head and a piston. A combustion ignition device is disposed in the combustion chamber and includes a nozzle defining a pre-chamber, a barrier discharge plasma igniter, including a tip portion disposed in the pre-chamber and a plurality of apertures disposed in the nozzle. The pre-chamber is in fluidic communication with the combustion chamber via the plurality of apertures. A controller is in communication with the engine and the barrier discharge plasma igniter. 1. A combustion ignition device disposed in a combustion chamber of an internal combustion engine , comprising:a pre-chamber shell having an inner surface defining a pre-chamber and one or more apertures establishing fluidic communication between the pre-chamber and the combustion chamber;a barrier-discharge plasma igniter, including a tip portion disposed in the pre-chamber; andone or more plasma propagating features extending from the pre-chamber shell inner surface into the pre-chamber.2. The combustion ignition device of claim 1 , wherein the one or more plasma propagating features comprise a refractory metal.3. The combustion ignition device of claim 1 , wherein the one or more plasma propagating features comprise a cone or wedge shape.4. The combustion ignition device of claim 1 , wherein the pre-chamber shell comprises a copper alloy claim 1 , an aluminum alloy claim 1 , or a refractory metal.5. The combustion ignition device of claim 1 , wherein the barrier-discharge plasma igniter comprises an electrode including a tip portion that is encapsulated in a dielectric material.6. The combustion ignition device of claim 1 , wherein the one or more plasma propagating features are biased towards the tip portion of the barrier-discharge plasma igniter.7. The combustion ignition device of claim 1 , wherein the one or more plasma propagating features comprise a surface ...

LASER SPARK PLUG

A laser ignition plug, comprising a pumped light source and a longitudinally pumped laser resonator, which are each arranged in the housing of the laser ignition plug, characterized by a cooling air inlet, a cooling air outlet and a cooling region connecting the cooling air inlet with the cooling air outlet, wherein the cooling region is surrounding the pumped light source at least in certain sectors. 115-. (canceled)16. A laser ignition plug , comprisinga housing,a pump light source,a longitudinally pumped laser resonator,said pump light source and said longitudinally pumped laser being arranged in said housing,wherein the laser ignition plug further comprisesa cooling air inlet,a cooling air outlet anda cooling region connecting said cooling air inlet with said cooling air outlet, wherein the cooling region is surrounding said pump light source at least in certain sectors.17. The laser ignition plug according to claim 16 , wherein the cooling region is configured as a cooling channel.18. The laser ignition plug according to claim 16 , wherein the cooling region has a structure enlarging the surface in the area of the pumped light source.19. The laser ignition plug according to claim 18 , wherein said structure enlarging the surface comprises a foamed body.20. The laser ignition plug according to claim 19 , wherein said foamed body is porous with open porosity.21. The laser ignition plug according to claim 19 , wherein the foamed body comprises a metallic foamed body claim 19 , a ceramic foamed body claim 19 , a plastic foamed body or a combination thereof.22. The laser ignition plug according to claim 16 , wherein elements are provided with higher thermal conductivity at least at one of the areas ofthe housing of the laser ignition plug,the lining of the cooling region, orthe area adjoining the pumped light source.23. The laser ignition plug according to claim 16 , wherein the pump light source has a VCSEL.24. An arrangement claim 16 , comprisingan internal ...

Laser spark plug and cleaning method for same

A laser spark plug, in particular for an internal combustion engine, having a combustion chamber window through which laser radiation may be emitted from an interior of the laser spark plug toward an exterior, the laser spark plug having a component which surrounds at least part of the beam path of the laser radiation in the area of the exterior. In particular, the laser spark plug, in the area of the component, has at least one channel which has at least two orifice sections and which allows fluid communication between the orifice sections, a first orifice section being situated in the area of an outer surface of the combustion chamber window, and a second orifice section being situated in a radially outer area of the laser spark plug, in particular of the component. 111-. (canceled)12. A laser spark plug , for an internal combustion engine , having a combustion chamber window through which laser radiation is irradiatable from an interior of the laser spark plug toward an exterior , comprising:a component which surrounds at least part of a beam path of the laser radiation in an area of the exterior;at least one channel, in the area of the component, which includes at least two orifice sections and which allows fluid communication between the orifice sections;a first orifice section situated in the area of an outer surface of the combustion chamber window; anda second orifice section situated in a radially outer area of the laser spark plug, in particular of the component.13. The laser spark plug of claim 12 , wherein a longitudinal axis of at least one first longitudinal section of the channel situated in the area of the first orifice section points essentially at a radial inward lying area of an outer surface of the combustion chamber window.14. The laser spark plug of claim 13 , wherein the longitudinal axis of the first longitudinal section is oriented so that a point of intersection of the longitudinal axis with the outer surface of the combustion chamber ...

CORONA IGNITION DEVICE

A corona ignition device is described, with a central electrode, an insulator, in which the central electrode sits, a coil, which is connected to the central electrode, a metal housing, which holds the insulator and surrounds the coil, and a cover, which closes the metal housing at its end facing away from the insulator. According to this disclosure, provision is made for a spring arranged between the cover and the coil. In another aspect, a shield is provided that surrounds the housing and comprises several shell elements which each surround a section of the circumference of the coil. 1. A corona ignition device , comprising:a central electrode;an insulator in which the central electrode sits;a coil connected to the central electrode;a metal housing which holds the insulator and surrounds the coil;a cover which closes the metal housing at an end facing away from the insulator; anda spring arranged between the cover and the coil.2. The corona ignition device according to claim 1 , wherein the spring is a compression spring.3. The corona ignition device according to claim 1 , wherein the spring comprises a metal plate having spring lugs and an opening through which an electrical connection of the coil is passed.4. The corona ignition device according to claim 3 , wherein the coil is wound onto a coil former having an extension which carries an electrical connection of the coil and projects through the opening of the metal plate.5. The corona ignition device according to claim 4 , wherein the coil former has a flange claim 4 , against which the metal plate presses.6. The corona ignition device according to claim 3 , wherein the metal plate has at least on a side facing the coil a surface of aluminium claim 3 , copper claim 3 , gold or silver.7. The corona ignition device according to claim 3 , wherein the metal plate is coated at least on a side facing the coil.8. The corona ignition device according to claim 1 , wherein the coil former and the central electrode are ...

METHOD AND SYSTEM FOR ENGINE CONTROL

Methods and systems are provided for drying engine cylinders in situ responsive to engine flooding. In one example, a laser ignition device is operated in each engine cylinder, sequentially, while the cylinder is parked with an intake valve closed and an exhaust valve open. The heat generated by the laser operation vaporizes liquid fuel in the cylinder, which flows out of the cylinder via the open exhaust valve, expediting cylinder drying. 1. A method , comprising:in response to flooding of an engine with fuel, sensed during an engine start attempt via sensors and a controller, shutting off fuel delivery to an engine cylinder and operating a laser ignition device of the cylinder to vaporize the fuel while holding an exhaust valve of the cylinder open and an intake valve of the cylinder closed.2. The method of claim 1 , further comprising rotating the engine claim 1 , unfueled via an electrically actuated motor claim 1 , to a position where the exhaust valve of the cylinder is open and the intake valve of the cylinder is closed claim 1 , the position including top dead center of an exhaust stroke of the cylinder claim 1 , the engine rotated at a speed lower than engine cranking speed.3. The method of claim 1 , wherein the laser ignition device is operated for a duration based on a degree of the flooding of the engine claim 1 , the duration increased as the degree of the flooding increases.4. The method of claim 1 , wherein the cylinder is a first cylinder claim 1 , the method further comprising sequentially operating a corresponding laser ignition device coupled to each remaining cylinder of the engine to dry the engine.5. The method of claim 4 , further comprising claim 4 , after drying the engine claim 4 , performing another engine start attempt.6. The method of claim 4 , further comprising selecting the first cylinder and an order of the sequentially operating the corresponding laser ignition device coupled to each remaining cylinder of the engine based on one or ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Provided is a control device for an internal combustion engine, employing a microprocessor to control a load other than an ignition device, the control device being provided to an internal combustion engine in which is installed a magnet generator that has a magneto coil for successively generating, in association with revolution of the internal combustion engine, a first half wave voltage, a second half wave voltage of different polarity than the first half wave voltage, and a third half wave voltage of identical polarity to the first half wave voltage; and the magnet generator employing the second half wave voltage to drive the ignition device. The device is provided with an electricity storage element which draws excess power from the output that is output by the magnet generator for the purpose of driving the ignition device, and which is charged by the first and second half wave voltages, as well as being charged by the second half wave voltage as well at times that the internal combustion engine is in the exhaust stroke, in order to supply power to the load and to the microprocessor. The power source circuit is constituted to use the energy stored in this electricity storage element to generate power source voltage for presentation to the microprocessor and to the load other than an ignition device. 1. A control device for an internal combustion engine , employing a microprocessor to control a particular object to be controlled , the control device being provided to an internal combustion engine in which is installed a magnet generator having an ignition device-driving magneto coil for induction of alternating current voltage in association with revolution of the internal combustion engine , the half wave voltage induced in the magneto coil being employed for presenting ignition energy to an ignition device for ignition of the internal combustion engine;wherein the control device for an internal combustion engine comprises: a power source circuit having a ...

LASER DEVICE AND INTERNAL COMBUSTION ENGINE

Laser devices include a light source that emits a laser beam, an optical system that concentrates the laser beam emitted from the light source, an optical window through which the laser beam exited from the optical system passes, a housing that accommodates the optical system, and an optical window holding member fixed to the housing. The optical window holding member holds the optical window. In the first laser device, the optical window has a face or a protruding face through which the laser beam passes. When the optical window has the face, the face is flush with an edge of the optical window holding member and a film is formed on the face. When the optical window has the protruding face, the protruding face protrudes with reference to the edge of the optical window holding member and a film is formed on the protruding face. 1. A laser device comprising:a light source configured to emit a laser beam;an optical system configured to concentrate the laser beam emitted from the light source;an optical window through which the laser beam exited from the optical system passes;a housing configured to accommodate the optical system; andan optical window holding member fixed to the housing, the optical window holding member holding the optical window,whereinthe optical window has a face or a protruding face through which the laser beam passes,when the optical window has the face, the face is flush with an edge of the optical window holding member and a film is formed on the face of the optical window, andwhen the optical window has the protruding face, the protruding face protrudes with reference to the edge of the optical window holding member and a film is formed on the protruding face of the optical window.2. The laser device according to claim 1 , wherein the film is formed across the optical window and the optical window holding member.3. The laser device according to claim 1 , wherein the film is an antireflection film configured to prevent the laser beam from being ...

LASER IGNITION SAFETY INTERLOCK SYSTEM AND METHOD

A safety interlock system and method is provided for a laser ignition system. The laser device can be disabled upon receiving an indication that the laser device has been removed from the cylinder. The removal can be inferred based on an estimated distance between the cylinder piston and the laser ignition device. 1. An engine method , comprising:adjusting operation of a laser ignition device coupled to an engine cylinder based on an inferred position of the device with respect to a piston of the cylinder.2. The method of claim 1 , wherein adjusting the operation includes enabling operation of the device when the inferred position of the device is in the cylinder and disabling operation of the device when the inferred position is out of the cylinder.3. The method of claim 1 , wherein adjusting the operation includes adjusting a power output of laser pulses emitted by the laser ignition device.4. The method of claim 3 , wherein the adjusting includes reducing the power output of the laser pulses in response to the inferred position indicating the device is removed from the cylinder.5. The method of claim 4 , wherein the inferred position is based on a time elapsed since emission of a laser pulse from the laser ignition device into the engine cylinder and detection of the laser pulse following reflection off the piston.6. The method of claim 5 , wherein the inferred position is based on the time elapsed relative to a threshold claim 5 , the threshold based on the piston being at a bottom dead center position.7. An engine method claim 5 , comprising:operating a cylinder laser ignition device to estimate a distance between the laser ignition device and a piston of the cylinder; anddisabling the laser ignition device in response to the estimated distance being larger than a threshold distance.8. The method of claim 7 , wherein the threshold distance is based on a length of the cylinder.9. The method of claim 8 , wherein disabling the laser ignition device includes ...

CLEANING APPARATUS FOR OPTICAL WINDOW, ENGINE, AND METHOD FOR CLEANING OPTICAL WINDOW OF ENGINE

An apparatus for cleaning a surface of an optical window includes a first electrode that is provided inside the optical window and is covered with a dielectric material forming the optical window. A second electrode is provided around the optical window and is exposed on at least one surface of the optical window. A power supply is electrically coupled between the first electrode and the second electrode. The apparatus further includes a controller that controls the power supply so as to generate dielectric barrier discharge along the surface of the optical window by applying a high-frequency or pulsed voltage between the first electrode and the second electrode. 1. An apparatus cleaning a surface of an optical window , the apparatus comprising:a first electrode that is provided inside the optical window and is covered with a dielectric material forming the optical window;a second electrode that is provided around the optical window and is exposed at at least one surface of the optical window;a power supply that is electrically coupled between the first electrode and the second electrode; anda controller that controls the power supply so as to generate dielectric barrier discharge along the surface of the optical window by applying a high-frequency or pulsed voltage between the first electrode and the second electrode.2. The apparatus according to claim 1 , whereinthe optical window is disposed in an engine that is ignited by a laser,the first electrode is disposed at an inner side of the surface on a combustion chamber side of the optical window, the second electrode is disposed to be exposed to the combustion chamber, and the dielectric barrier discharge is generated along the surface on the combustion chamber side of the optical window.3. The apparatus according to claim 2 , wherein the first electrode is disposed at a center of the optical window on a plane perpendicular to an axis of incidence of the laser.4. The apparatus according to claim 3 , wherein the ...

Laser Ignition Device

A laser ignition device for an internal combustion engine can include a laser generator, a housing, and a window. The laser generator can emit a pulse of laser light. The housing can be coupled to the internal combustion engine. The housing can have a first end and a second end. The second end can be proximate to a combustion chamber of the internal combustion engine and can define an aperture through which the laser light is permitted to exit the housing into the combustion chamber. The window can be coupled to the second end of the housing and cover the aperture. The window can permit the laser light to pass through the window and into the combustion chamber. The window can have a rounded outer surface. 1. An ignition device for an internal combustion engine , the ignition device comprising:a laser generator configured to emit a pulse of laser light;a housing configured to be coupled to the internal combustion engine, the housing having a first end and a second end, the second end being proximate to a combustion chamber of the internal combustion engine and defining an aperture through which the laser light is permitted to exit the housing into the combustion chamber; anda window coupled to the second end of the housing and covering the aperture, the window being configured to permit the laser light to pass through the window and into the combustion chamber, the window having a rounded outer surface.2. The ignition device of claim 1 , further comprising a focusing lens disposed within the housing between the first and second ends and configured to focus the laser light to a focal point outside of the housing and within the combustion chamber.3. The ignition device of claim 2 , further comprising a collimate lens disposed between the laser generator and the focusing lens claim 2 , the collimate lens directing the laser light to the focusing lens.4. The ignition device of claim 1 , wherein the outer surface of the window has a single radius of curvature.5. The ...

LASER IGNITION SYSTEM

A laser ignition system, in particular for an internal combustion engine, including a vertical emitter and a laser-active crystal, the laser-active crystal being doped in at least some areas using ytterbium, the ytterbium-doped area having a length of 200 μm to 7000 μm. The monolithic laser is based on a YAG or LuAG host crystal having 3 differently doped areas: a laser-active ytterbium-doped area, an undoped area which determines the resonator length and therefore the pulse duration, and a chromium-doped or vanadium-doped area for the passive Q-switch. The resonator is delimited by 2 mirrors. 113-. (canceled)14. A laser ignition system for an internal combustion engine , comprising:a vertical emitter; anda laser-active crystal, the laser-active crystal being doped in at least some areas using ytterbium, the ytterbium-doped area having a length of 200 μm to 7000 μm.15. The laser ignition system as recited in claim 14 , wherein the ytterbium-doped area has a length of 300 μm to 5000 μm.16. The laser ignition system as recited in claim 14 , wherein the laser-active crystal has a total length of 5 mm to 50 mm.17. The laser ignition system as recited in claim 14 , wherein the laser-active crystal is at least in areas at least one of: i) a YAG host crystal claim 14 , ii) a LuAG host crystal claim 14 , iii) a GGG host crystal claim 14 , and iv) a GSGG host crystal.18. The laser ignition system as recited in claim 14 , wherein the laser-active crystal has at least one further area.19. The laser ignition system as recited in claim 18 , wherein the laser-active crystal has two further areas.20. The laser ignition system as recited in claim 19 , wherein at least three areas of the laser-active crystal have the same host crystal.21. The laser ignition system as recited in claim 19 , wherein a second area of the laser-active crystal is essentially undoped.22. The laser ignition system as recited in claim 19 , wherein a third area of the laser-active crystal is doped using ...

PLASMA IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES

A plasma ignition device for internal combustion engines is described. It comprises a driving and analog and/or digital control unit, an ignition coil and a spark plug, interconnected each other in a circuit by means of electrical/electronic connection means. The ignition coil comprises two primary windings connected in series each other, having a central electrical connection between the first primary winding and the second primary winding, for electrically charging a capacitor, connected in series to the two primary windings, and for magnetically charging a magnetic core magnetically coupled to a secondary winding of the ignition coil, in order to generate a potential difference across a discharge “gap” of a spark plug. 1. A plasma ignition device for internal combustion engines comprising a driving and analog and/or digital control unit , an ignition coil , a spark plug , interconnected each other in a circuit by means of electrical/electronic connection means wherein said ignition coil comprises two primary windings connected in series each other , having a central electrical connection between the first primary winding and the second primary winding , for electrically charging a capacitor , connected in series to the two said primary windings , and for magnetically charging a magnetic core magnetically coupled to a secondary winding of said ignition coil in order to generate a potential difference across a discharge “gap” of a spark plug.2. The plasma ignition device according to claim 1 , wherein said driving and analog and/or digital control unit comprises a driving and control unit claim 1 , a first diode claim 1 , a second diode claim 1 , a static switch claim 1 , a resistor claim 1 , a voltage control device claim 1 , so as to perform claim 1 , by driving the static switch claim 1 , the opening/closing of the electric/magnetic circuit responsible for electrically/magnetically charging/discharging said two primary windings claim 1 , of said secondary ...

IGNITER ASSEMBLY, INSULATOR THEREFOR AND METHODS OF CONSTRUCTION THEREOF

An igniter, such as a corona igniter for an internal combustion engine, and a method of manufacturing the igniter, are provided. The igniter includes an insulator with enlarged upper and lower end regions extending axially beyond opposite ends of a constrained, reduced diameter region of a shell through passage. The enlarged lower end region of the insulator is disposed axially outwardly of a lower end of the shell. The insulator is hermetically sealed to the shell and is permanently fixed against being removed axially outwardly from the shell. The method can include conforming the shell to the contour of the insulator by plastically deforming the shell, or casting the shell about the insulator. Alternatively, separate pieces of metal can be disposed around the insulator to form the shell which is conformed to the insulator. 1. A corona igniter , comprising:an insulator surrounding a central electrode;said insulator having an insulator outer surface including an insulator intermediate region between an insulator upper end region and an insulator lower end region;{'b': 1', '2', '3', '2', '3', '1, 'said insulator intermediate region having a maximum first diameter ID, said insulator upper end region having a minimum second diameter ID, and said insulator lower end region having a minimum third diameter ID, wherein said minimum second diameter ID and said minimum third diameter ID are both greater than said maximum first diameter D;'}a shell formed of metal surrounding said insulator;said shell having a shell outer surface including a threaded region with a plurality of threads;said shell having a shell inner surface including a shell lower end region radially aligned with said threaded region;{'b': 1', '2', '3, 'said shell lower end region having a maximum inner diameter SD which is less than said minimum second diameter ID and said minimum third diameter ID of said insulator outer surface;'}said shell being plastically deformed such that said shell inner surface ...

HIGH FREQUENCY IGNITION DEVICE

An ignition device includes: a high frequency power source; a first device having inductance; a second device having capacitance; a discharge GAP; and a shield device which covers a connection portion between the first device and the second device, and is connected to the ground. The high frequency power source supplies AC power to the discharge GAP by using a resonance circuit composed of the first device and the second device, and ignites fuel by discharge plasma generated in the discharge GAP. In the ignition device, the first device, the second device, the connection portion, and the shield device are arranged in the same package and are sealed with an insulating substance. 1. A high frequency ignition device comprising:a high frequency power source;a first device having inductance;a second device which is connected to said first device and has capacitance;a discharge GAP composed of a nigh voltage electrode and a grounding electrode; anda shield device which covers a connection portion between said first device and said second device and is connected to the ground,said high frequency power source supplying AC power to said discharge GAP by using a resonance circuit composed of said first device and said second device arid thereby igniting fuel by discharge plasma generated in said discharge GAP,wherein at least said first device, said second device, said connection portion, and said shield device are arranged in the same package and are sealed with an insulating substance.2. The high frequency ignition device according to claim 1 ,wherein said first device, said second device, said connection portion, said shield device, and said high voltage electrode are arranged in the same package and are sealed with an insulating substance.3. The high frequency ignition device according to claim 1 ,wherein a capacitance value by electrical coupling between said connection portion and said shield device is made smaller than a capacitance value in which said second device ...

SYSTEMS AND METHODS OF CONTROLLING VALVE TIMING IN AN ENGINE

A vehicle includes an engine having a combustion chamber with an inlet and an outlet. Valves and valve actuators regulate open and closing of the inlet and the outlet. A plasma ignition source initiates ignition in the combustion chamber. A controller is in communication with the inlet valve actuator and outlet valve actuator. The controller is configured to detect a transition from a first combustion mode of the engine to a second combustion mode of the engine. The controller is also configured to change at least one of an opening time, a closing time, and an open duration of the first valve in response to detecting the transition. 1. A method of operating a combustion engine utilizing a plasma ignition source , the engine having a combustion chamber defining an inlet and an outlet , a first valve regulating one of the inlet and the outlet , and a second valve regulating the other of the inlet and the outlet , the method comprising:detecting a transition from a first combustion mode of the engine to a second combustion mode of the engine, wherein the first combustion mode is defined as the load on the engine being between a first load threshold and a second load threshold and the speed of the engine being between a minimum speed and a speed threshold;changing at least one of an opening time, a closing time, and an open duration of the first valve in response to detecting the transition.2. The method as set forth in further comprising maintaining an opening time claim 1 , a closing time claim 1 , and an open duration of the second valve in response to detecting the transition.3. The method as set forth in further comprising detecting a completing of the transition from the first combustion mode to the second combustion mode of the engine.4. The method as set forth in further comprising changing at least one of the opening time claim 3 , the closing time claim 3 , and the open duration of the second valve in response to detecting the completing of the transition from ...

Compact Laser Ignition Device for Combustion Engine

A high efficiency optical ignition device is provided in a two-part compact and robust package to be mounted directly on an internal combustion engine chamber. The ignition device ignites a combustion fuel with a high intensity plasma generated by a high power laser beam from a solid state laser operable in Q-switched, or non-Q-switched mode for producing short or long pulses, respectively. Multiple pulses are generated, and duration and frequency of the laser beam pulses are controlled by controlling an optical pump module to pump the solid state laser. The optical pump module comprises a semiconductor laser, preferably a VCSEL device. One or more laser beams are precisely directed, each one to a desired location anywhere within the combustion chamber for more efficient and near complete burning of the combustion fuel. The robust packaging is well suited to withstand mechanical and thermal stresses of the internal combustion engine. 1. A laser ignition device comprising:a housing having a lower and an upper section placed in good thermal contact by bonding, wherein the exterior of the lower section comprises a threaded region to be attached to a correspondingly threaded cavity of an internal combustion engine wall, said lower and upper sections further including respective interior cavities, said cavities align to provide a contiguous hollow space, and a sealed window located at one extreme end of the lower section opposite from the upper section;a cooling apparatus surrounding the housing and in thermal contact with the housing;an optical pump module mounted on a first submount, said submount placed in thermal contact with a heat sink and a first section of the interior wall of the housing, such that the optical pump module is in thermal contact with the cooling apparatus;a solid state laser mounted on a second submount, said solid state laser including at least one solid gain medium disposed between a high reflectivity coating and a low reflectivity coating ...

METHOD AND APPARATUS FOR CONTROLLING OPERATION OF AN INTERNAL COMBUSTION ENGINE

An internal combustion engine includes a combustion chamber defined by a cylinder bore in a cylinder block, a cylinder head and a piston. A groundless barrier discharge plasma igniter including an electrode is embedded in a casing fabricated from a dielectric material and is disposed in a mounting boss. The groundless barrier discharge plasma igniter has a tip portion that protrudes through an opening in the cylinder head into the combustion chamber. A controller having an electrical ground connection to the cylinder head is configured to apply a high frequency electrical pulse to the groundless barrier discharge plasma igniter. An electrical ground path is formed between the mounting boss and the cylinder head. A plurality of plasma discharge streamers is generated on the casing between the tip portion and the mounting boss when the controller applies the high frequency electrical pulse to the groundless barrier discharge plasma igniter. 1. An internal combustion engine , comprising:a combustion chamber defined by a cylinder bore formed in a cylinder block, a cylinder head and a piston;a groundless barrier discharge plasma igniter including an electrode embedded in a casing fabricated from a dielectric material and disposed in a mounting boss, the groundless barrier discharge plasma igniter having a tip portion that protrudes through an opening in the cylinder head into the combustion chamber; anda controller having an electrical ground connection to the cylinder head and configured to apply a high-frequency, high-voltage electrical pulse to the groundless barrier discharge plasma igniter;wherein an electrical ground path is formed between the mounting boss and the cylinder head; andwherein a plasma discharge streamer is generated on the casing between the tip portion and the mounting boss when the controller applies the high-frequency, high-voltage electrical pulse to the groundless barrier discharge plasma igniter.2. The internal combustion engine of claim 1 , ...

LASER IGNITION SYSTEM

A laser ignition system has: at least one arrangement for producing a pulsed laser beam; and at least one arrangement for focusing the produced pulsed laser beam onto a focus zone, e.g., in order to ignite a combustible gas mixture in an internal combustion engine or a burner. The laser ignition system is designed to produce a pulsed laser beam having a normed fluence volume greater than 0.1. 117-. (canceled)18. A laser ignition system , comprising:at least one unit for producing a pulsed laser beam; andat least one unit for focusing the produced pulsed laser beam onto a focus zone in order to ignite a combustible gas mixture;{'sup': 2', '2, 'wherein the laser ignition system is configured to produce a pulsed laser beam having a normed fluence volume greater than 0.1, the fluence volume being given by the volume in which a minimum fluence is everywhere exceeded, and the normed fluence volume resulting from the fluence volume normed to the maximum possible fluence volume, and the minimum fluence assuming a value in the range of from 10 J/mmto 20 J/mm.'}19. The laser ignition system as recited in claim 18 , wherein the maximum possible fluence volume is the maximum fluence volume that can theoretically be achieved through variation of a numerical aperture of the focusing while simultaneously holding constant the minimum fluence and laser beam features including pulse energy and beam quality M.20. The laser ignition system as recited in claim 19 , wherein the minimum fluence is given by a value in the range of from 1/10 to ½ of a maximum fluence of the pulsed laser beam in the focus zone.21. The laser ignition system as recited in claim 19 , wherein a maximum fluence of the pulsed laser beam in the focus zone is not less than 10 J/mm.22. The laser ignition system as recited in claim 19 , wherein a maximum fluence of the pulsed laser beam in the focus zone is between 10 J/mmand 120 J/mm.23. The laser ignition system as recited in claim 19 , wherein the fluence volume ...

Ignition device and method of producing super hydrophilic membrane to be used in ignition device

In an ignition device having an ignition plug for igniting a fuel mixture gas introduced in a combustion chamber, a super hydrophilic membrane is formed on a surface at the combustion chamber side of a plug forming member of the ignition plug. The super hydrophilic membrane contains super hydrophilic particles and thermal excitation catalyst particles, and satisfies a relationship of θ W2 <θ W1 , where θ W1 indicates a water contact angle between water and the plug forming member on which no super hydrophilic membrane is formed, and θ W2 indicates a water contact angle between water and the plug forming member on which the super hydrophilic membrane is formed.

A method for igniting a fuel-air mixture of a combustion chamber, in particular in an internal combustion engine, by generating a corona discharge

Beschrieben wird ein Verfahren zum Zünden eines Brennstoff-Luft-Gemisches in einem taktweise arbeitenden Verbrennungsmotor mit einer oder mehreren Brennkammern (1), welche durch auf Massepotential liegende Wände (2, 3, 4) begrenzt sind, mittels einer Zündeinrichtung mit einer in jeder Brennkammer (1) vorgesehenen Zündelektrode (5), in welchem Verfahren mittels eines elektrischen DC/AC-Wandlers (12), ein elektrischer Schwingkreis (7) erregt wird, der mit der Sekundärseite (17) des DC/AC-Wandlers (12) verbunden ist und in welchem die Zündelektrode (5), welche mittels eines Isolators (6) elektrisch isoliert durch eine der die Brennkammer (1) begrenzenden Wände (2, 3, 4) hindurchgeführt ist und in die Brennkammer (1) ragt, im Zusammenwirken mit den auf Massepotential liegenden Wänden (2, 3, 4) der Brennkammer (1) eine Kapazität darstellt, und in welchem die Erregung des Schwingkreises (7) in der Weise gesteuert wird, dass in jeder Brennkammer (1) an der Zündelektrode (5) eine das Brennstoff-Luft-Gemisch zündende Korona-Entladung (22) erzeugt wird. Erfindungsgemäß ist vorgesehen, dass Verbrennungsrückstände, welche sich auf der in der Brennkammer (1) liegenden Oberfläche des Isolators (6) abgelagert haben, in der Brennkammer (1) von Zeit zu Zeit von der Oberfläche des Isolators (6) insbesondere durch Vorgänge der Verbrennung und/oder der Elektroerosion entfernt werden. A method is described for igniting a fuel-air mixture in an internal combustion engine operating cyclically with one or more combustion chambers (1), which are limited by walls (2, 3, 4) at ground potential, by means of an ignition device with one in each combustion chamber (1) provided ignition electrode (5), in which method by means of an electrical DC / AC converter (12), an electrical oscillating circuit (7) is excited, which is connected to the secondary side (17) of the DC / AC converter (12) and in which the ignition electrode (5), which is electrically insulated by means of an insulator (6), is ...

Method for igniting fuel-air mixture in cyclically operated internal combustion engine, involves connecting electric voltage to primary winding before each ignition point of combustion engine

The method involves connecting an electric voltage to a primary winding before each ignition point of a combustion engine. The primary winding is subsequently identified as primary voltage and is increased stepwise. The strength of the electric current flowing in the primary winding as consequence of primary voltage is subsequently identified as primary current and is repeatedly measured at the same voltage.

A method of exciting an RF resonant circuit having as component an igniter for igniting a fuel-air mixture in a combustion chamber

Die Erfindung betrifft ein Verfahren zum Erregen eines HF-Schwingkreises, welcher als Bestandteil einen Zünder (1) zum Zünden eines Brennstoff-Luft-Gemisches in einer Brennkammer (20) eines Verbrennungsmotors mittels einer Korona-Entladung enthält, wobei der Zünder (1) eine Zündelektrode (1a) und einen die Zündelektrode (1) umgebenden Isolator (1b) aufweist, mittels eines DC/AC-Wandlers (6), welcher durch aufeinanderfolgende Stromimpulse angeregt wird, die jeweils andauern, solange ein von einer Steuerschaltung (11) gesteuerte Schalter (7, 8) in seinem leitenden Schaltzustand ist. Erfindungsgemäß ist vorgesehen, dass der Schalter (7, 8) betätigt wird, wenn ein Momentanwert des im HF-Schwingkreis angeregten Wechselstroms oder der Wechselspannung eine erste Schaltschwelle (A–, B–) betätigt wird, wenn der Momentanwert des im HF-Schwingkreis angeregten Wechselstroms oder der Wechselspannung eine zweite Schaltschwelle (A+, B+, C+) überschreitet. The invention relates to a method for exciting an RF resonant circuit which contains as component a detonator (1) for igniting a fuel-air mixture in a combustion chamber (20) of an internal combustion engine by means of a corona discharge, the igniter (1) a Ignition electrode (1a) and an ignition electrode (1) surrounding the insulator (1b), by means of a DC / AC converter (6), which is excited by successive current pulses, each lasting as long as a controlled by a control circuit (11) switch (7, 8) is in its conducting state. According to the invention, it is provided that the switch (7, 8) is actuated when an instantaneous value of the alternating current excited in the HF resonant circuit or of the AC voltage is actuated using a first switching threshold (A, B) if the instantaneous value of the excited in the HF resonant circuit AC or AC voltage exceeds a second switching threshold (A +, B +, C +).

Internal combustion engine ignited by microwave

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Laser igniting apparatus for internal combustion engine

Method of exhaust gas heat recovery in internal combustion engine

Ignition method of fuel mixture in internal combustion engine with laser optic discharge and aviation laser spark plug

FIELD: engines and pumps. SUBSTANCE: invention relates to aviation spark plugs, wherein an optical pulse discharge is used for igniting the fuel mixture "kerosene + air", wherein the laser radiation energy is concentrated in a predetermined focus F. Aviation laser spark plug comprises a laser machine consisting of a power supply unit (1) and a radiator unit (2), radiating energy in the form of a laser beam (3), an optical fibre (4), a cylindrical body (5) consisting of the component parts: (7, 8, 9, 10, 11), through which a channel (6) moves to pass energy in a form of the laser beam 3, a diverging lens (12) with a sealing ring (13), a focusing lens (14) with a sealing ring (15), material (16) with a low coefficient of expansion and a sealing ring (17). EFFECT: energy concentration of the optical discharge at a predetermined focus and increased reliability of ignition of kerosene-air fuel mixture by reducing the probability of optical-induced breakdown in the long channel of the laser plug. 4 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 626 465 C2 (51) МПК F02P 23/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2015146735, 29.10.2015 (24) Дата начала отсчета срока действия патента: 29.10.2015 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 29.10.2015 (43) Дата публикации заявки: 11.05.2017 Бюл. № 14 Адрес для переписки: 420111, г. Казань, ул. К. Маркса, 10, КНИТУКАИ, отдел интеллектуальной собственности (56) Список документов, цитированных в отчете о поиске: RU 2436991 C1, 20.12.2011. RU 2 6 2 6 4 6 5 R U (54) Способ воспламенения топливной смеси в двигателе внутреннего сгорания лазерным оптическим разрядом и авиационная лазерная свеча зажигания (57) Реферат: Изобретение относится к области проходит канал (6) для прохождения энергии в авиационного двигателестроения, а конкретно к виде лазерного луча 3, рассеивающую линзу (12) авиационным свечам зажигания, в которых для с ...

Ignition system for internal combustion engine

Method and apparatus for starting a diesel engine at a subfreezing temperature

Method and apparatus for starting a glow-plug assisted diesel engine at a subfreezing temperature involves directing a flow of concentrated oxygen at a predetermined rate and pressure to the intake manifold of the diesel engine. The concentrated oxygen flow is directed directly into the intake manifold to fill the intake manifold with a high concentration of oxygen. When drawn into the firing chamber of the engine, the high concentration of oxygen is compressed during the compression stroke of the engine. Fuel is injected into the chamber with the compressed oxygen and ignited to start the engine.

Semiconductor laser plug

Laser module

The invention relates to a laser module (100) having a housing (110a) and having at least one laser unit (120) that is disposed in the housing (110a) for generating laser pulses. According to the invention, the laser module (100) has at least one primary sealing region (130a) and at a secondary sealing region (130b) that is disposed at least partially in the primary sealing region (130a) and the laser unit (120) is disposed inside the secondary sealing region (130b).

Laser spark plug

FIELD: instrument engineering. SUBSTANCE: invention relates to laser spark plugs with ignition cell for combustion engines. Essence of the invention consists in that laser spark plug contains a body, an insulator, a microchip laser installed in the cavity inside the insulator, a vacuum tube connected to it, an optical window, a focusing glass, an ignition cell with a cylindrical and conical cavity, washer with a hole between the optical window and ignition cell and target, installed in one of the cavities of the ignition cell on the holder, as well as several outlets entering the conical cavity. In this case, vacuum tube is installed with concentricity error relative to the ignition cell axis, the hole in the washer is also made with concentricity error, and in the cylindrical cavity of the ignition cell on central shaft impeller of the aerodynamic turbine is installed. Laser plug may comprise an additional optical window with a protective cavity between the optical window and an additional optical window. Microchip laser can be installed on a shock absorber. On the insulator, from the side of the inner cavity, a metallized coating may be applied contacting the body. Central shaft of the turbine can be mounted on ceramic bush bearings. EFFECT: technical result is an increase in the service life of the laser spark plug by preventing contamination of the optics and the laser beam outlet. 5 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 649 720 C1 (51) МПК F02P 23/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по ...

Device for laser ignition of fuel-air mixture in internal combustion engine

Изобретение относится к энергетике и двигателестроению, конкретно к средствам воспламенения топливовоздушной смеси преимущественно в двигателях внутреннего сгорания (ДВС). Технический результат - повышение полноты сгорания топлива из-за его воспламенения в объеме и, как следствие, снижение эмиссии вредных веществ. Устройство для лазерного воспламенения топливовоздушной смеси в двигателе внутреннего сгорания содержит лазерную свечу, имеющую металлический корпус, установленные внутри нее изолятор и оптическое волокно, проходящее вдоль оси свечи внутри изолятора и соединенное с блоком накачки, и фокусирующую линзу. Фокусирующая линза выполнена с возможностью осевого перемещения, между изолятором и оптическим волокном выполнена кольцевая полость, в которой установлен держатель, на торце которого установлена фокусирующая линза, а с держателем связано средство его перемещения, соединенное с генератором импульсов, средство перемещения выполнено в виде пьезоэлемента, пьезоэлемент соединен электрическими связями через дополнительный электрод и вкладыш с генератором импульсов, устройство дополнительно содержит блок управления, соединенный электрическими связями с блоком накачки и с генератором импульсов. 12 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 634 300 C2 (51) МПК F02P 23/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (21)(22) Заявка: 2016103044, 29.01.2016 29.01.2016 (73) Патентообладатель(и): Болотин Николай Борисович (RU) Дата регистрации: 25.10.2017 Приоритет(ы): (22) Дата подачи ...

Ignition method of fuel mixture in internal combustion engine with laser optic discharge, and device for its implementation

FIELD: engines and pumps. SUBSTANCE: ignition of fuel-and-air mixture (FAM) in internal combustion engines (ICE) is achieved by means of laser optic discharge; for its intensification the laser beam is concentrated on metal surface of engine piston. Device for implementing the method includes laser (4) with optic light guide (5) and with focusing lens (8). Synchronisation unit (2) is connected to power amplifier of laser (4) pumping (3) and to sensor (1) of position of engine distribution shaft. Focusing lens (8) in upper part is connected through light guide (5) to laser (4), and on the side of engine (11) cylinder it has thrust bush (9) to which there attached is an opening from quartz sand, which separates optic system from combustion products in engine (11) cylinder. Laser (4) pumping power amplifier (3) represents a pack of capacitors, which is connected to storage battery. EFFECT: simpler ignition system owing to using one laser; higher ignition reliability of FAM at high pressures, owing to which economic effectiveness and available use of laser ignition system in ICE is achieved. 6 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 436 991 (13) C1 (51) МПК F02P 23/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010128335/07, 08.07.2010 (24) Дата начала отсчета срока действия патента: 08.07.2010 (45) Опубликовано: 20.12.2011 Бюл. № 35 C 1 2 4 3 6 9 9 1 (54) СПОСОБ ВОСПЛАМЕНЕНИЯ ТОПЛИВНОЙ СМЕСИ В ДВИГАТЕЛЕ ВНУТРЕННЕГО СГОРАНИЯ ЛАЗЕРНЫМ ОПТИЧЕСКИМ РАЗРЯДОМ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Изобретение относится к автомобилестроению, а конкретно к системам воспламенения топливовоздушной смеси (ТВС) в двигателях внутреннего сгорания (ДВС). Сущность способа заключается в следующем. Воспламенение ТВС в ДВС достигается с помощью лазерного оптического разряда, для его интенсификации лазерный луч концентрируют на металлическую поверхность поршня двигателя. Устройство для осуществления ...

Engine ignition device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method for operating a group of glow plugs in a diesel engine

본 발명은 개별의 공급 라인을 통해 직류 전원과 연결되며 적어도 시간 평균으로 동일한 온도에서 어느 경우에나 펄스 폭 변조 프로세스에 의해 제어되는 디젤 엔진의 예열 플러그 그룹을 제어하는 방법에 관한 것이다. 본 방법은 예열 플러그의 전기 저항을 연산하고, 엔진 동작 예열 플러그가 제어되는 상대적 펄스폭을 연산하기 위해 예열 플러그의 공급 라인의 저항을 감하거나, 엔진 동작 동안 각 예열 플러그에 대한 공급라인의 저항을 결정하는 단계로 이루어져, 각 예열 플러그를 개별적으로 제어하기 위해 개별의 상대적 펄스 폭을 연산하거나 또한 펄스폭 변조에 의해 예열 플러그에 주기로 공급되는 전기 에너지를 결정할 수가 있다. The present invention relates to a method for controlling a glow plug group of a diesel engine connected to a direct current power source via a separate supply line and controlled by a pulse width modulation process in any case at the same temperature, at least with a time average. The method calculates the electrical resistance of the glow plugs, subtracts the resistance of the glow plug's supply line to calculate the relative pulse width at which the engine operation glow plug is controlled, or reduces the supply line's resistance to each glow plug during engine operation. Determination may be made to calculate the individual relative pulse widths to control each glow plug individually or also to determine the electrical energy supplied periodically to the glow plugs by pulse width modulation. 예열 플러그, 펄스 폭 변조, 공급 라인, 디젤 엔진, 동작 온도에 영향을 미치는 변수 Glow plugs, pulse width modulation, supply lines, diesel engines, variables affecting operating temperature

The method of ignition of the fuel mixture in an internal combustion engine with a laser optical discharge and an aviation laser spark plug

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2015 146 735 A (51) МПК F02P 23/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2015146735, 29.10.2015 Приоритет(ы): (22) Дата подачи заявки: 29.10.2015 (43) Дата публикации заявки: 11.05.2017 Бюл. № 14 R U (57) Формула изобретения 1. Способ воспламенения топливной смеси в двигателе внутреннего сгорания лазерным оптическим разрядом, включающий нагрев и воспламенение горючей смеси, путем подачи энергетического импульса от лазерного источника, отличающийся тем, что фокусирование лазерного луча, инициирующего оптический разряд, производят в заданном фокусе в пространстве, при этом фокусируемый луч рассеивают перед фокусирующей линзой с помощью рассеивающей линзы. 2. Способ по п. 1, отличающийся тем, что положение оптического разряда в заданном фокусе регулируют в зависимости от состава горючей смеси и оборотов двигателя путем изменения момента подачи энергетического импульса на лазер, а энергетический импульс на лазерный источник подают по сигналу датчика на распределительном валу двигателя. 3. Авиационная лазерная свеча зажигания, содержащая корпус с каналом подвода энергии и каналом вывода энергии, оптический световод, фокусирующую линзу, блок синхронизации, связанный с усилителем мощности накачки лазера и датчиком положения распределительного вала двигателя, отличающаяся тем, что в канале вывода энергии установлена рассеивающая линза, а на выходе канала установлено защитное окно. 4. Авиационная лазерная свеча зажигания по п. 3, отличающаяся тем, что защитное окно выполнено из материала с малым коэффициентом расширения, высокой термической стойкостью. Стр.: 1 A 2 0 1 5 1 4 6 7 3 5 A (54) Способ воспламенения топливной смеси в двигателе внутреннего сгорания лазерным оптическим разрядом и авиационная лазерная свеча зажигания 2 0 1 5 1 4 6 7 3 5 (72) Автор(ы): Саттаров Альберт Габдулбарович (RU), Хайруллин Мидехат Нуруллович (RU), Хафизов Ильгиз Габдулхакович (RU), ...

Diesel engine ignition system and laser sparking plug

FIELD: engines and pumps. SUBSTANCE: diesel engine ignition system includes a high-pressure fuel pump and installed in each cylinder fuel injector and sparking plug, connected to the ignition distributor cable. Sparking plugs are made laser with the laser source and the focusing lens, containing the prechamber with fuel supply channel, which is arranged coaxially to the laser source. The high pressure fuel pump is connected to a tube supplying fuel supply channel of each sparking plug. The fuel supply channel into the prechamber can be formed between two tubes: inner and outer. The inner and/or outer tube can be made of a material with high thermal conductivity. The inner and/or outer tube can be made of an alloy, containing copper. The inner and / or outer tube can be made of an alloy, containing the precious metals. EFFECT: increase of the capacity and reliability of the sparking ignition engine with improved cooling. 6 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 612 188 C1 (51) МПК F02P 23/04 (2006.01) F02M 57/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (21)(22) Заявка: 2016103125, 29.01.2016 29.01.2016 (73) Патентообладатель(и): Болотин Николай Борисович (RU) Дата регистрации: 02.03.2017 Приоритет(ы): (22) Дата подачи заявки: 29.01.2016 WO2013007439 A1 17.01.2013. US2009159031 A1 25.06.2009. WO2011138087 A2 10.11.2011. (45) Опубликовано: 02.03.2017 Бюл. № 7 Адрес для переписки: 443112, г. Самара, ул. Крайняя, 18, кв. 17, Болотину Николаю Борисовичу 2 ...

CONTROL OF THE FREQUENCY OF EXCITATION OF A RADIOFREQUENCY CANDLE.

ELECTROMAGNETIC SWITCH

A.COMMUTATEUR ELECTROMAGNETIQUE AVEC UNE BOBINE PLACEE ENTRE LA PARTIE DE RACCORDEMENT ET LE SUPPORT D'UN CONTACT DE COMMUTATION FIXE. B.COMMUTATEUR ELECTROMAGNETIQUE CARACTERISE EN CE QUE LA BOBINE 27 EST REALISEE D'UNE SEULE PIECE AVEC AU MOINS L'UNE DES PARTIES 26 LIMITROPHES DES EXTREMITES DE LA BOBINE. C.L'INVENTION S'APPLIQUE NOTAMMENT AUX COMMUTATEURS DES BOUGIES A INCANDESCENCE SUR UN MOTEUR DIESEL. A. ELECTROMAGNETIC SWITCH WITH A COIL PLACED BETWEEN THE CONNECTION PART AND THE SUPPORT OF A FIXED SWITCHING CONTACT. B. ELECTROMAGNETIC SWITCH CHARACTERIZED IN THAT COIL 27 IS MADE IN ONE PIECE WITH AT LEAST ONE OF THE PARTS 26 BOUNDARIES OF THE ENDS OF THE COIL. C. THE INVENTION APPLIES IN PARTICULAR TO GLOW-PLUG SWITCHES ON A DIESEL ENGINE.

AUXILIARY STARTER FOR INTERNAL COMBUSTION ENGINE

Combustion device for low cetane number engine

Device to facilitate the starting of internal combustion engines

Improvements to glow plug devices for internal combustion engines

Laser ignition device for internal combustion engine

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

INTERNAL COMBUSTION ENGINE

Die Erfindung betrifft eine Brennkraftmaschine mit Fremdzündung, bei der die Zündung des Kraftstoffes durch zumindest einen auf einen Zündort (14, 15) in einem Brennraum (7) fokussierten Laserstrahl (12) erfolgt, mit einer Laserquelle (11) und einer Fokussiereinrichtung (13) zur Bereitstellung und Fokussierung des Laserstrahles (12). Um auf möglichst einfache Weise eine optimale Zündung des Kraftstoffes im Brennraum (7) zu erreichen, ist vorgesehen, dass im Strahlenweg des Laserstrahles (12) eine optische Einrichtung (30) zur Strahlumleitung und/oder Strahlaufteilung angeordnet ist, mittels der der Laserstrahl (12) an zumindest zwei verschiedenen Zündorten (14, 15) im Brennraum (7) fokussierbar ist. The invention relates to an internal combustion engine with spark ignition, in which the fuel is ignited by at least one laser beam (12) focused on an ignition location (14, 15) in a combustion chamber (7), with a laser source (11) and a focusing device (13) to provide and focus the laser beam (12). In order to achieve optimum ignition of the fuel in the combustion chamber (7) in the simplest possible way, it is provided that an optical device (30) for beam diversion and / or beam splitting is arranged in the beam path of the laser beam (12), by means of which the laser beam (12 ) can be focused at at least two different ignition locations (14, 15) in the combustion chamber (7).

Laser ignition

Sequenced pulses of light from an excitation laser with at least two resonator cavities with separate output couplers are directed through a light modulator and a first polarzing analyzer. A portion of the light not rejected by the first polarizing analyzer is transported through a first optical fiber into a first ignitor laser rod in an ignitor laser. Another portion of the light is rejected by the first polarizing analyzer and directed through a halfwave plate into a second polarization analyzer. A first portion of the output of the second polarization analyzer passes through the second polarization analyzer to a second, oscillator, laser rod in the ignitor laser. A second portion of the output of the second polarization analyzer is redirected by the second polarization analyzer to a second optical fiber which delays the beam before the beam is combined with output of the first ignitor laser rod. Output of the second laser rod in the ignitor laser is directed into the first ignitor laser rod which was energized by light passing through the first polarizing analyzer. Combined output of the first ignitor laser rod and output of the second optical fiber is focused into a combustible fuel where the first short duration, high peak power pulse from the ignitor laser ignites the fuel and the second long duration, low peak power pulse directly from the excitation laser sustains the combustion.

Laser ignition

In the apparatus of the invention, multiple lasers (10, 170) are used in tandem to provide a compact, durable engine deployable fuel ignition (270, 280) laser system. Reliable fuel ignition is provided over a wide range of fuel conditions by using a first laser (10) as an excitation light source for one (170) or more small lasers (170) located proximate to one (280, 290) or more (280, 290, 285, 295) fuel combustion zones.

Glow Plug System, Controlling Device And Method for Controlling the Power of a Glow Plug

본 명세서는 차량의 디젤 엔진용 예열 플러그 시스템을 개시하며, 이 시스템은 공급 전압(U1) 연결용 양극 단자와 접지 전위(GND) 연결용 접지 단자를 구비하는 예열 플러그(RG1, RG2)와, 측정 입력단(ADC1)과 접지 입력단(ADC2)을 구비하며, 접지 입력단(ADC2)에 인가된 기준 전위(GND')에 상대적인 공급 전압(U1)의 값을 측정하기 위한, 동작시 상기 예열 플러그(RG1, RG2)에 공급되는 전력을 제어하는 제어 장치(1)를 포함한다. 제어 장치(1)는 테스트 입력단(ADC3)을 구비하며, 테스트 입력단(ADC3)은 동작시 제 1 저항(R1)을 경유하여 테스트 전압 소스에 연결되고 제 2 저항(R2)을 경유하여 예열 플러그(RG1, RG2)의 양극 단자에 연결되며, 이에 의해 제어 장치(1)는 동작시 테스트 입력단(ADC3)의 전위와 접지 입력단(ADC2)의 기준 전위(GND') 사이의 차이를 결정하며, 이들 전위들의 기준 값과의 차이를 결정하고, 만약 이 기준 값과의 차이가 제로(0)가 아니라면, 이 기준 값과의 차이를 공급 전압(U1)의 상기 측정된 값을 보정하는데 사용하고 또한 공급 전압(U1)의 이 보정된 값을 전력 제어를 위해 사용한다. 더 나아가 본 명세서는 이런 종류의 예열 플러그 시스템을 위한 제어 장치 및 예열 플러그의 전력을 제어하는 방법을 개시한다. 예열 플러그

A kind of microwave-assisted plug ignition method and its integrating device

本发明公开了一种微波辅助火花塞点火方法，该方法包括如下步骤：向火花塞系统发出脉冲信号，触发所述火花塞系统产生脉冲高电压；向微波系统发出脉冲信号，触发所述微波系统产生特定频率和特定功率的微波脉冲；所述脉冲高电压加载到所述火花塞上，电弧放电击穿稀薄燃气产生等离子体团；所述微波脉冲辐射微波能扩大所述等离子体团，实现内燃机稀薄燃烧的点火。本发明还公开了一种微波辅助火花塞点火集成装置。本发明的方法结合了火花塞高电压放电击穿以及微波向等离子体团耦合能量的优点，本发明的装置包括火花塞系统和微波系统，在内燃机燃烧室高气压环境下，实现稀薄燃烧的稳定点火。

Auxiliary apparatus for starting internal combustion engine

Laser beam-steam engine for car

Optical power transmission device

光パワー伝送装置は、第１光利得発生手段と第１光反射手段とを備える発光ユニットと、光ファイバと、第２光反射手段と、受光手段と、を備え、前記第２光反射手段は、前記光ファイバよりも受光手段側に配置され、前記第１光反射手段と前記第２光反射手段との間に、前期第１光利得発生手段と前記光ファイバとが光学的に接続されることによって第１レーザ共振器を構成しており、前記第１レーザ共振器で発生した第１レーザ光が前記受光手段に入射するように構成されている。 The optical power transmission device includes a light emitting unit including a first light gain generating means and a first light reflecting means, an optical fiber, a second light reflecting means, and a light receiving means. , The first light gain generating means and the optical fiber of the previous term are optically connected between the first light reflecting means and the second light reflecting means. As a result, the first laser resonator is formed, and the first laser light generated by the first laser resonator is configured to be incident on the light receiving means.