WO2013035881A1 - Structure d'antenne, fiche de rayonnement haute fréquence et moteur à combustion interne - Google Patents

Structure d'antenne, fiche de rayonnement haute fréquence et moteur à combustion interne Download PDF

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Publication number
WO2013035881A1
WO2013035881A1 PCT/JP2012/073105 JP2012073105W WO2013035881A1 WO 2013035881 A1 WO2013035881 A1 WO 2013035881A1 JP 2012073105 W JP2012073105 W JP 2012073105W WO 2013035881 A1 WO2013035881 A1 WO 2013035881A1
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WIPO (PCT)
Prior art keywords
radiation
antenna
radiating
main
insulator
Prior art date
Application number
PCT/JP2012/073105
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English (en)
Japanese (ja)
Inventor
池田　裕二
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イマジニアリング株式会社
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Filing date
Publication date
Application filed by イマジニアリング株式会社 filed Critical イマジニアリング株式会社
Priority to JP2013532691A priority Critical patent/JP6145759B2/ja
Publication of WO2013035881A1 publication Critical patent/WO2013035881A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • F02P23/045—Other physical ignition means, e.g. using laser rays using electromagnetic microwaves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits

Definitions

  • the present invention relates to an antenna structure in which a radiating antenna for radiating a high frequency is covered with an insulator, a high frequency radiation plug including the antenna structure, and an internal combustion engine including the high frequency radiation plug.
  • JP 2010-96128 A discloses an internal combustion engine provided with this type of antenna structure.
  • an electromagnetic wave supply path is embedded in a cylinder head, and an end surface on the combustion chamber side of the electromagnetic wave supply path is a radiation antenna. This radiating antenna is covered with a dielectric.
  • the present invention has been made in view of such a point, and an object thereof is to improve high-frequency radiation efficiency in an antenna structure in which a radiation antenna for radiating high-frequency waves is embedded in an insulator.
  • a first invention includes a radiation antenna for radiating a high frequency, and an insulator in which the radiation antenna is embedded.
  • the insulator is exposed to a radiation space that radiates a high frequency, and is An antenna structure in which a main radiation surface for radiating high-frequency radiation to the radiation space is formed, wherein the radiation antenna is formed in a rod shape and bends along the main radiation surface inside the insulator.
  • the installation positions of adjacent portions adjacent to each other in the radiation antenna are shifted in the direction perpendicular to the main radiation surface.
  • the radiation antenna is a rod-like antenna that extends while bending along the main radiation surface.
  • the installation positions of adjacent portions adjacent to each other in the radiation antenna are shifted in the direction perpendicular to the main radiation surface.
  • the radiation antenna area (hereinafter referred to as “transparent antenna area”) when the main radiation surface is seen through from the front is larger.
  • transparent antenna area when providing such a rod-shaped radiating antenna along only one cross section parallel to the main radiating surface in an insulator, install the radiating antenna so that dielectric breakdown does not occur between adjacent parts that are not in contact with each other.
  • the cross section it is necessary to secure a certain distance between adjacent portions. Therefore, in order to ensure the space
  • the installation positions of the proximity portions are shifted from each other in the direction perpendicular to the main radiation surface. Therefore, when the main radiation surface is seen through from the front, the interval between adjacent portions can be reduced or eliminated. As a result, the limitation of the fluoroscopic antenna area is relaxed.
  • the radiation antenna extends spirally along the radiation surface.
  • the adjacent portions abut or overlap each other.
  • a fourth invention is constituted by the antenna structure of any one of the first to third inventions, a transmission line for transmitting a high frequency radiated from the radiation antenna, and a cylindrical conductor, and the radiation antenna is provided at one end. And a casing for accommodating the transmission line extending from the radiation antenna to the other end side.
  • a fifth invention includes the high-frequency radiation plug according to the fourth invention, and an internal combustion engine main body in which a combustion chamber is formed and the high-frequency radiation plug is attached to the combustion chamber so as to radiate a high frequency. It is an internal combustion engine.
  • the positions of the adjacent portions in the direction perpendicular to the main radiating surface are shifted from each other, whereby the interval between the adjacent portions when the main radiating surface is seen through from the front can be reduced or eliminated. . Therefore, the limitation of the fluoroscopic antenna area is relaxed and the fluoroscopic antenna area can be increased, so that high-frequency radiation efficiency can be improved.
  • 1 is a longitudinal sectional view of an internal combustion engine according to an embodiment. It is a front view of the ceiling surface of the combustion chamber of the internal combustion engine which concerns on embodiment. It is a block diagram of the ignition device and electromagnetic wave radiation device concerning an embodiment. It is a longitudinal cross-sectional view of the plug for high frequency radiation which concerns on embodiment. It is the perspective view which saw through the antenna structure which concerns on embodiment. It is the front view which saw through the antenna structure which concerns on embodiment from the main radiation surface.
  • the present embodiment is an internal combustion engine 10 according to the present invention.
  • the internal combustion engine 10 is a reciprocating type internal combustion engine in which a piston 23 reciprocates.
  • the internal combustion engine 10 includes an internal combustion engine body 11, an ignition device 12, an electromagnetic wave emission device 13, and a control device 35. In the internal combustion engine 10, a combustion cycle in which the air-fuel mixture is ignited by the ignition device 12 and the air-fuel mixture is combusted is repeatedly performed.
  • -Internal combustion engine body
  • the internal combustion engine main body 11 includes a cylinder block 21, a cylinder head 22, and a piston 23 as shown in FIG.
  • a plurality of cylinders 24 having a circular cross section are formed in the cylinder block 21.
  • a piston 23 is provided in each cylinder 24 so as to reciprocate.
  • the piston 23 is connected to the crankshaft via a connecting rod (not shown).
  • the crankshaft is rotatably supported by the cylinder block 21.
  • the cylinder head 22 is placed on the cylinder block 21 with the gasket 18 in between.
  • the cylinder head 22, together with the cylinder 24, the piston 23, and the gasket 18, constitutes a partition member that partitions the combustion chamber 20 having a circular cross section.
  • the diameter of the combustion chamber 20 is, for example, about half the wavelength of the microwave that the electromagnetic wave emission device 13 radiates to the combustion chamber 20.
  • the cylinder head 22 is provided with one spark plug 40 that constitutes a part of the ignition device 12 for each cylinder 24.
  • the tip exposed to the combustion chamber 20 is positioned at the center of the ceiling surface 51 of the combustion chamber 20 (the surface exposed to the combustion chamber 20 in the cylinder head 22).
  • the outer periphery of the distal end portion of the spark plug 40 is circular as viewed from the axial direction.
  • a center electrode 40 a and a ground electrode 40 b are provided at the tip of the spark plug 40.
  • a discharge gap is formed between the tip of the center electrode 40a and the tip of the ground electrode 40b.
  • An intake port 25 and an exhaust port 26 are formed in the cylinder head 22 for each cylinder 24.
  • the intake port 25 is provided with an intake valve 27 that opens and closes an intake side opening 25a of the intake port 25, and an injector 29 that injects fuel.
  • the exhaust port 26 is provided with an exhaust valve 28 for opening and closing the exhaust side opening 26 a of the exhaust port 26.
  • each ignition device 12 is provided for each combustion chamber 20. As shown in FIG. 3, each ignition device 12 includes an ignition coil 14 that outputs a high voltage pulse, and an ignition plug 40 that is supplied with the high voltage pulse output from the ignition coil 14.
  • the ignition coil 14 is connected to a DC power source (not shown).
  • the ignition coil 14 boosts the voltage applied from the DC power supply, and outputs the boosted high voltage pulse to the center electrode 40 a of the spark plug 40.
  • the spark plug 40 when a high voltage pulse is applied to the center electrode 40a, dielectric breakdown occurs in the discharge gap and spark discharge occurs. A discharge plasma is generated in the discharge path of the spark discharge. A negative voltage is applied to the center electrode 40a as a high voltage pulse.
  • the ignition device 12 may include a plasma expansion unit that supplies electric energy to the discharge plasma to expand the discharge plasma.
  • a plasma expansion part expands a spark discharge by supplying high frequency (for example, microwave) energy to discharge plasma, for example. According to the plasma expansion part, it is possible to improve the stability of ignition with respect to a lean air-fuel mixture.
  • the electromagnetic wave emission device 13 may be used as the plasma expansion unit.
  • the electromagnetic wave radiation device 13 includes an electromagnetic wave generator 31, an electromagnetic wave switch 32, and a high frequency radiation plug 34.
  • the electromagnetic wave radiation device 13 one electromagnetic wave generator 31 and one electromagnetic wave switch 32 are provided, and a high frequency radiation plug 34 is provided for each combustion chamber 20.
  • the electromagnetic wave generator 31 When receiving the electromagnetic wave drive signal (pulse signal) from the control device 35, the electromagnetic wave generator 31 continuously outputs the microwave over the time of the pulse width of the electromagnetic wave drive signal.
  • the electromagnetic wave generator 31 outputs a microwave with an output value (for example, 500 watts) of 100 to 1000 watts.
  • a semiconductor oscillator In the electromagnetic wave generator 31, a semiconductor oscillator generates microwaves. In place of the semiconductor oscillator, another oscillator such as a magnetron may be used.
  • the electromagnetic wave switch 32 includes one input terminal and a plurality of output terminals provided for each high-frequency radiation plug 34.
  • the input terminal is electrically connected to the electromagnetic wave generator 31.
  • Each output terminal is electrically connected to the input terminal of the corresponding high-frequency radiation plug 34.
  • the electromagnetic wave switch 32 is controlled by the control device 35 and sequentially switches the supply destination of the microwaves output from the electromagnetic wave generator 31 between the plurality of high-frequency radiation plugs 34.
  • the high-frequency radiation plug 34 is formed in a substantially cylindrical shape as a whole.
  • the high-frequency radiation plug 34 includes a ceramic structure 36 in which a conductor is embedded in a ceramic 63 (electrical insulator), and a casing 37 that houses the ceramic structure 36.
  • the ceramic structure 36 is formed in a prismatic shape.
  • the cross-sectional shape of the ceramic structure 36 is uniform over the length direction.
  • the cross-sectional shape of the ceramic structure 36 is, for example, a square.
  • the ceramic structure 36 has the same length of one side in any cross section, and the length of one side is, for example, 1.5 to 5 mm (for example, 3 mm).
  • the ceramic structure 36 includes a transmission unit 38 in which a microwave transmission line 60 is embedded, and a radiation unit 39 in which the radiation antenna 16 is embedded.
  • the transmission unit 38 and the radiation unit 39 are integrated.
  • the transmission part 38 occupies most.
  • one end portion constitutes a radiating portion 39 and the remaining portion constitutes a transmission portion 38.
  • a center conductor 61 and an outer conductor 62 constituting a microwave transmission line 60 are embedded in a ceramic 63.
  • the center conductor 61 is a linear conductor.
  • the center conductor 61 is provided on the axial center of the ceramic structure 36 over the entire length of the transmission portion 38.
  • the outer conductor 62 is, for example, a rectangular cylindrical conductor.
  • the outer conductor 62 surrounds the central conductor 61 with the ceramic 63 interposed therebetween.
  • the outer conductor 62 is provided at a certain distance from the center conductor 61 over its entire length. Only one end of the outer conductor 62 is exposed at the end face of the ceramic structure 36.
  • one end of the transmission unit 38 is a microwave input terminal. In the transmission unit 38, the microwave input from the input terminal is transmitted to the radiation unit 39 without leaking outside the outer conductor 62.
  • the outer conductor 62 is configured by combining a conductor layer and a cylindrical conductor (via hole). Also good. In that case, the distance between the cylindrical conductors adjacent to each other in the microwave transmission direction is set in the outer conductor 62 so that the microwave does not leak outside the outer conductor 62.
  • the radiating unit 39 constitutes an antenna structure including a radiating antenna 16 for radiating microwaves and a ceramic 63 (insulator) in which the radiating antenna 16 is embedded.
  • the radiation antenna 16 is embedded in the radiation part 39 so that the radiation antenna 16 is not exposed to the outer surface of the ceramic structure 36. That is, the entire surface of the radiation antenna 16 is covered with the ceramic 63.
  • the radiation antenna 16 is integrated with the central conductor 61 of the transmission unit 38 at the input end.
  • the end surface 65 and a part of side surface of the ceramic structure 36 become an exposed surface exposed to the combustion chamber 20 (radiation space). Of these exposed surfaces, the end surface 65 of the ceramic structure 36 from which most of the microwave radiated from the radiation antenna 16 is radiated to the combustion chamber 20 constitutes the main radiation surface 65.
  • the main radiation surface 65 is a surface where the area of the radiation antenna 16 when viewed from the front is the largest among the exposed surfaces.
  • the radiation antenna 16 is formed in a rod shape and is bent along the main radiation surface 65 inside the ceramic 63. Specifically, as shown in FIG. 5, the radiating antenna 16 is a spiral conductor that turns in a rectangular shape around the axis of the center conductor 61. As shown in FIGS. 5 and 6, in the radiation antenna 16, the installation positions of adjacent portions 66 and 67 adjacent to each other in the radiation antenna 16 are shifted in the direction perpendicular to the main radiation surface 65. In the radiation antenna 16, when the main radiation surface 65 is seen through from the front, the flange portions of the proximity portions 66 and 67 are in contact with each other. When the main radiation surface 65 is seen through from the front, the proximity portions 66 and 67 may overlap each other.
  • the radiating antenna 16 includes a central portion 100 that is in contact with the central conductor 61 and configured by a single cylindrical conductor, and a central portion 100 that is provided outside the central portion 100 and configured by a plurality of cylindrical conductors.
  • the first intermediate portion 101 and the second intermediate portion 102, and the outer peripheral portion 103 provided on the outermost side and configured by a plurality of cylindrical conductors.
  • the center portion 100, the first intermediate portion 101, the second intermediate portion 102, and the outer peripheral portion 103 are provided in this order from the inside, and the ends of those adjacent to each other are connected by the connection conductor 104.
  • the first intermediate portion 101 and the second intermediate portion 102 constitute adjacent portions 66 and 67.
  • the second intermediate portion 102 and the outer peripheral portion 103 constitute adjacent portions 66 and 67.
  • the radiating antenna 16 only the second intermediate portion 192 of the central portion 100, the first intermediate portion 101, the second intermediate portion 102, and the outer peripheral portion 103 is installed in the direction perpendicular to the main radiating surface 65. It is shifted to the side. As a result, the installation positions of the first intermediate portion 101 and the second intermediate portion 102 are shifted in the direction perpendicular to the main radiation surface 65. The installation positions of the second intermediate portion 102 and the outer peripheral portion 103 are shifted in the direction perpendicular to the main radiation surface 65.
  • the casing 37 is formed in a cylindrical shape having a circular outer peripheral shape and a rectangular inner peripheral shape in cross-sectional view.
  • the inner peripheral shape of the casing 37 and the side length of the inner periphery are the same as the outer peripheral shape of the ceramic structure 36 and the side length of the outer periphery.
  • a ceramic structure 36 is fitted into the casing 37 so that the end face of the radiation part 39 is exposed at one end and the end face of the transmission part 38 is exposed at the other end. From one end of the casing 37, a part of the radiating portion 39 protrudes so that a part of the radiating antenna 16 is located outside the casing 37.
  • the outer diameter of the casing 37 changes at one place in the axial direction of the casing 37.
  • a step is formed on the outer peripheral surface of the casing 37 only at one location.
  • the outer diameter on the distal end side where the radiation part 39 is exposed is smaller than the outer diameter on the proximal end side where the transmission part 38 is exposed.
  • the high frequency radiation plug 34 is attached to the cylinder head 22 so that the radiation part 39 is exposed to the combustion chamber 20.
  • the high frequency radiation plug 34 is screwed into the mounting hole of the cylinder head 22.
  • the input terminal of the transmission part 38 is connected to the output terminal of the electromagnetic wave switch 32 via a coaxial cable (not shown).
  • the microwave when a microwave is input from the input terminal of the transmission unit 38, the microwave passes through the inside of the outer conductor 62 of the transmission unit 38. The microwaves that have passed through the transmission unit 38 are radiated from the radiation antenna 16 to the combustion chamber 20.
  • a plurality of receiving antennas 52 that resonate with microwaves radiated from the radiation antenna 16 to the combustion chamber 20 are provided on the partition members that partition the combustion chamber 20.
  • Each receiving antenna 52 is formed in an annular shape. As shown in FIG. 1, two receiving antennas 52 are provided on the top of the piston 23.
  • Each receiving antenna 52 is electrically insulated from the piston 23 by an insulating layer 56 formed on the top surface of the piston 23, and is provided in an electrically floating state.
  • the operation of the control device 35 will be described.
  • the control device 35 performs a first operation for instructing the ignition device 12 to ignite the air-fuel mixture in one combustion cycle for each combustion chamber 20, and a microwave is applied to the electromagnetic wave emission device 13 after the ignition of the air-fuel mixture.
  • a second operation for instructing radiation is performed.
  • control device 35 performs the first operation at the ignition timing at which the piston 23 is positioned before the compression top dead center.
  • the control device 35 outputs an ignition signal as the first operation.
  • spark discharge occurs in the discharge gap of the spark plug 40 as described above.
  • the air-fuel mixture is ignited by spark discharge.
  • the flame spreads from the ignition position at the center of the combustion chamber 20 toward the wall surface of the cylinder 24.
  • the control device 35 performs the second operation after the air-fuel mixture has ignited, for example, at the start timing of the second half period of flame propagation.
  • the control device 35 outputs an electromagnetic wave drive signal as the second operation.
  • the electromagnetic wave radiation device 13 When receiving the electromagnetic wave drive signal, the electromagnetic wave radiation device 13 radiates a microwave continuous wave (CW) from the radiation antenna 16 as described above. Microwaves are emitted over the second half of the flame propagation. Note that the output timing and pulse width of the electromagnetic wave drive signal may be set so that the microwave is emitted over a period in which the flame passes through the region where the two receiving antennas 52 are provided.
  • CW microwave continuous wave
  • each receiving antenna 52 the microwave resonates.
  • a strong electric field region having a relatively strong electric field strength is formed in the combustion chamber 20 throughout the second half period of the flame propagation.
  • the propagation speed of the flame is increased by receiving microwave energy when the flame passes through the strong electric field region.
  • microwave plasma When the microwave energy is large, microwave plasma is generated in the strong electric field region. Active species (for example, OH radicals) are generated in the generation region of the microwave plasma. The propagation speed of the flame passing through the strong electric field region is increased by the active species. -Effect of the embodiment-
  • the adjacent portions 66 and 67 in the case where the main radiating surface 65 is seen through from the front side are shifted by shifting the installation positions of the adjacent portions 66 and 67 in the direction perpendicular to the main radiating surface 65. Can be reduced or eliminated. Therefore, the limitation on the fluoroscopic antenna area is relaxed and the fluoroscopic antenna area can be increased, so that the microwave radiation efficiency can be improved. ⁇ Other Embodiments >>
  • the embodiment may be configured as follows.
  • the radiation antenna 16 is formed in a spiral shape that turns in a rectangular shape, but the radiation antenna 16 may be formed in a spiral shape that turns in a circular shape. Further, the radiation antenna 16 may be a rod-shaped antenna bent into a rectangular wave shape that reciprocates a plurality of times when the main radiation surface 65 is seen through from the front.
  • the center conductor 61 is in contact with the radiation antenna 16, but the center conductor 61 may be capacitively coupled to the radiation antenna 16.
  • a plurality of high-frequency radiation plugs 34 may be provided in the internal combustion engine body 11.
  • the outer conductor 62 of the transmission unit 38 may be omitted. In that case, the transmission unit 38 transmits microwaves between the outer peripheral surface of the center conductor 61 and the inner peripheral surface of the casing 37.
  • the central conductor 61 of the transmission unit 38 may be omitted, and the transmission unit 38 may be a waveguide.
  • the internal combustion engine 10 may be of another type (diesel engine, ethanol engine, gas turbine, etc.). Further, when the internal combustion engine 10 is an aircraft engine, when the engine misfires, the ignition device 12 and the electromagnetic wave radiation device 13 are used to generate a microwave plasma obtained by expanding the spark discharge plasma using a microwave, and reignition is performed. You may go.
  • the present invention relates to an antenna structure in which a radiating antenna for radiating a high frequency is covered with an insulator, a high frequency radiation plug including the antenna structure, and an internal combustion engine including the high frequency radiation plug. Useful for.
  • Radiation antenna 36 Ceramic structure 39 Radiation part (antenna structure) 61 Center conductor 63 Ceramic (insulator) 67 Proximity part 68 Proximity part

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

　L'objectif de la présente invention est d'améliorer l'efficacité de rayonnement d'ondes haute fréquence dans une structure d'antenne dans laquelle une antenne rayonnante émettant des ondes haute fréquence est noyée dans un isolant. La présente invention concerne une structure d'antenne comprenant une antenne rayonnante émettant des ondes haute fréquence, ainsi qu'un isolant dans lequel l'antenne rayonnante est noyée, une surface de rayonnement principale étant réalisée sur l'isolant et cette surface de rayonnement principale étant exposée à un espace de rayonnement émettant des ondes haute fréquence, les ondes haute fréquence émises par l'antenne rayonnante rayonnant en direction de l'espace de rayonnement. La structure d'antenne selon l'invention est caractérisée en ce que l'antenne rayonnante est réalisée en tant que tige qui forme des coudes le long de la surface de rayonnement principale à l'intérieur de l'isolant, les positions de sections de contact adjacentes dans l'antenne rayonnante étant décalées dans une direction perpendiculaire à la surface de rayonnement principale.
PCT/JP2012/073105 2011-09-11 2012-09-10 Structure d'antenne, fiche de rayonnement haute fréquence et moteur à combustion interne WO2013035881A1 (fr)

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Application Number Priority Date Filing Date Title
JP2013532691A JP6145759B2 (ja) 2011-09-11 2012-09-10 アンテナ構造、高周波放射用プラグ、及び内燃機関

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JP2011-197764 2011-09-11
JP2011197764 2011-09-11

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WO2013035881A1 true WO2013035881A1 (fr) 2013-03-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016066939A (ja) * 2014-09-25 2016-04-28 京セラ株式会社 アンテナ、アンテナ基板および燃焼補助装置
EP3184805A4 (fr) * 2014-08-21 2018-05-02 Imagineering, Inc. Moteur à combustion interne de type à allumage par compression, et moteur à combustion interne

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11177334A (ja) * 1997-12-11 1999-07-02 Murata Mfg Co Ltd チップアンテナ
WO2005101574A1 (fr) * 2004-04-09 2005-10-27 The Furukawa Electric Co., Ltd. Antenne miniature
WO2009008520A1 (fr) * 2007-07-12 2009-01-15 Imagineering, Inc. Bougie d'allumage et dispositif d'analyse
JP2009281188A (ja) * 2008-05-20 2009-12-03 Aet Inc 火花放電点火方式とマイクロ波プラズマ点火方式を併用する点火装置
JP2010096109A (ja) * 2008-10-17 2010-04-30 Denso Corp 点火装置
JP2010096128A (ja) * 2008-10-17 2010-04-30 Daihatsu Motor Co Ltd 火花点火式内燃機関

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11177334A (ja) * 1997-12-11 1999-07-02 Murata Mfg Co Ltd チップアンテナ
WO2005101574A1 (fr) * 2004-04-09 2005-10-27 The Furukawa Electric Co., Ltd. Antenne miniature
WO2009008520A1 (fr) * 2007-07-12 2009-01-15 Imagineering, Inc. Bougie d'allumage et dispositif d'analyse
JP2009281188A (ja) * 2008-05-20 2009-12-03 Aet Inc 火花放電点火方式とマイクロ波プラズマ点火方式を併用する点火装置
JP2010096109A (ja) * 2008-10-17 2010-04-30 Denso Corp 点火装置
JP2010096128A (ja) * 2008-10-17 2010-04-30 Daihatsu Motor Co Ltd 火花点火式内燃機関

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3184805A4 (fr) * 2014-08-21 2018-05-02 Imagineering, Inc. Moteur à combustion interne de type à allumage par compression, et moteur à combustion interne
JP2016066939A (ja) * 2014-09-25 2016-04-28 京セラ株式会社 アンテナ、アンテナ基板および燃焼補助装置

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