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公开(公告)号：US11939943B2
公开(公告)日：2024-03-26
申请号：US18110539
申请日：2023-02-16
申请人： DENSO CORPORATION
发明人： Akimitsu Sugiura
摘要： Disclosed is an ignition apparatus for an internal combustion engine. The ignition apparatus includes a spark plug, an ignition coil and a controller. The spark plug has an auxiliary combustion chamber in which a discharge gap is arranged. The ignition coil is configured to apply a voltage to the spark plug. The controller is configured to perform a multiple-discharge mode in which discharge is generated at least twice, with a discharge pause period intervening therebetween, across the discharge gap within a period from a compression stroke to an expansion stroke of the internal combustion engine.
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公开(公告)号：US11129268B2
公开(公告)日：2021-09-21
申请号：US15914101
申请日：2018-03-07
发明人： Shota Kinoshita , Fumiaki Aoki , Daisuke Tanaka , Akimitsu Sugiura , Jan Husarik , Masashi Kando
摘要： An ignition apparatus is provided which ignites a mixture of air and fuel gas by plasma to generate an initial flame. The apparatus includes: a spark plug that includes an inner conductor, a cylindrical outer conductor that holds the inner conductor thereinside, and a dielectric that is provided between the inner conductor and the outer conductor, and that generates plasma in a plasma formation space between the inner conductor and the outer conductor; an electromagnetic wave power supply that generates an electromagnetic wave to apply electromagnetic wave power to the spark plug; an evaluation section that evaluates a state of formation of the plasma; a determination section that determines a matching object of the electromagnetic wave based on an evaluation result by the evaluation section; and a coupled state control section that controls a matching condition of the electromagnetic wave so that the electromagnetic wave matches the matching object.
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公开(公告)号：US10718310B2
公开(公告)日：2020-07-21
申请号：US15755709
申请日：2016-08-23
发明人： Masaaki Kono , Daisuke Tanaka , Takaaki Sato , Akimitsu Sugiura , Mitsuhiro Tsue , Shinji Nakaya
IPC分类号： F02P3/00 , F02P3/01 , F02P23/04 , F02P3/04 , F02P15/10 , F02P3/05 , F02P9/00 , F02P15/02 , F02P17/12 , F02P15/08 , F02P5/04 , F02P1/00
摘要： An ignition apparatus includes a plasma device, a first circuit, a second circuit, and a control unit. The plasma device produces a plasma discharge in an air-fuel mixture before an arc discharge is produced. The first circuit causes an ignition plug to start the arc discharge. The second circuit energizes a primary coil in a direction opposite to the direction of the energization by the first circuit during the arc discharge, to maintain energization of the secondary coil in the same direction as the direction of the energization started by an operation of the first circuit, to cause continuation of the arc discharge. The control unit controls operations of the first circuit, the second circuit, and the plasma device.
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公开(公告)号：US10714905B2
公开(公告)日：2020-07-14
申请号：US16452894
申请日：2019-06-26
申请人： DENSO CORPORATION
摘要： A spark plug for an internal combustion engine includes a housing, an insulator, a center electrode, a ground electrode, and a plug cover. The housing has a cylindrical shape. The insulator is held on an inner side of the housing. The insulator has a cylindrical shape. The center electrode is held on an inner side of the insulator. The ground electrode forms a discharge gap with the center electrode. The plug cover, together with the housing, configures an auxiliary combustion chamber in which the discharge gap is arranged. The plug cover includes a spray hole that communicates between the inside and outside of the plug cover. The ground electrode is connected to a plurality of locations on an auxiliary-chamber inner wall surface that includes surfaces of the housing and the plug cover that are exposed to the auxiliary combustion chamber.
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公开(公告)号：US10361027B2
公开(公告)日：2019-07-23
申请号：US16077526
申请日：2016-12-20
申请人： DENSO CORPORATION
摘要： A step-up transformer, an oscillator, and an ignition plug are comprised. The step-up transformer has a primary winding, a secondary winding, and a core. The ignition plug is connected to a first end of the secondary winding. A gap is formed in the core. The step up transformed is provided with a shielding part which is made of a conductive material and shields the magnetic flux leaking from the gap. A second end of the secondary winding is electrically connected to the shielding part.
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公开(公告)号：US09957946B2
公开(公告)日：2018-05-01
申请号：US15468424
申请日：2017-03-24
申请人： DENSO CORPORATION
发明人： Shota Kinoshita , Akimitsu Sugiura , Kaori Doi , Fumiaki Aoki
IPC分类号： F02P3/00 , F02P13/00 , H05H1/46 , F02P3/05 , F02P9/00 , F02P15/10 , F02P3/045 , F02P15/00 , F02P17/12 , H05H1/52
CPC分类号： F02P13/00 , F02P3/0456 , F02P3/05 , F02P3/053 , F02P9/002 , F02P15/005 , F02P15/10 , F02P17/12 , H05H1/46 , H05H1/52
摘要： An ignition device includes a spark plug, a measurement value detector, an electrical breakdown determiner, an AC voltage applying section, and a first changing section. The measurement value detector includes primary and secondary coils, and detects at least one measurement value among an ignition coil, a primary current, a primary voltage, a secondary current, and a secondary voltage. The electrical breakdown determiner determines whether a discharge has become an electrical breakdown state based on the measurement value. The AC voltage applying section applies an AC voltage of a first predetermined frequency that causes voltage resonance to the primary coil. The first changing section changes the frequency of the AC voltage to a second predetermined frequency that can maintain the electrical breakdown state and is lower in frequency than the first predetermined frequency when it is determined that the discharge has become the electrical breakdown state.
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公开(公告)号：US09391431B2
公开(公告)日：2016-07-12
申请号：US14093096
申请日：2013-11-29
申请人： DENSO CORPORATION
发明人： Shinichi Okabe , Yoshihiro Nakase , Akimitsu Sugiura , Yuya Abe
CPC分类号： H01T13/52 , H01T13/467
摘要： A barrier discharge ignition apparatus has a tip end exposed to a combustion chamber of an internal combustion engine and, when subjected to a high-frequency high-voltage AC burst, generates streamer discharges for igniting a fuel/air mixture in the combustion chamber. A central electrode of the apparatus, covered by a dielectric layer and coaxially enclosed in a ground electrode, extends into the combustion chamber to a greater distance than the ground electrode. An electrode portion close to the tip end of the inner periphery of the ground electrode protrudes towards the dielectric layer, for creating a localized high-density electric field. The streamer discharges thereby enter both the to combustion chamber and also a discharge chamber of the ignition apparatus.
摘要翻译： 阻挡放电点火装置具有暴露于内燃机的燃烧室的前端，当经受高频高压交流脉冲时，产生用于点燃燃烧室内的燃料/空气混合物的流光放电。 该装置的中心电极被电介质层覆盖并同轴地封闭在接地电极中，延伸到燃烧室中至比接地电极更大的距离。 靠近接地电极的内周的末端的电极部朝向电介质层突出，用于产生局部高密度电场。 流光放电从而进入燃烧室和点火装置的放电室。
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公开(公告)号：US09267474B2
公开(公告)日：2016-02-23
申请号：US13943868
申请日：2013-07-17
申请人： DENSO CORPORATION
发明人： Yuya Abe , Akimitsu Sugiura , Shinichi Okabe
CPC分类号： F02M57/06 , F02P23/045
摘要： In an ignition device, a base section of a discharge chamber is formed by a part of a central dielectric body. A front section of a ground electrode and a front end section of the central dielectric body are projected toward a combustion chamber of a head cylinder of an internal combustion engine by a predetermined height which is measured from a top ceiling wall of the head cylinder. The predetermined height of the front end section of the central dielectric body projected into the inside of the head cylinder is the same or higher than the predetermined height of the front end section of the ground electrode projected into the inside of the head cylinder. The predetermined height of the front end section of the ground electrode is within a range of 3 mm to 25 mm.
摘要翻译： 在点火装置中，放电室的基部由中心电介质体的一部分形成。 将接地电极的前部和中央电介质体的前端部朝向内燃机的头部气缸的燃烧室突出从头部气缸的顶部顶壁测量的预定高度。 突出到头筒内侧的中央电介质体的前端部的预定高度与突出于头筒内侧的接地电极的前端部的预定高度相同或更高。 接地电极的前端部的预定高度在3mm〜25mm的范围内。
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公开(公告)号：US11973323B2
公开(公告)日：2024-04-30
申请号：US18074722
申请日：2022-12-05
申请人： DENSO CORPORATION
发明人： Akimitsu Sugiura
摘要： A spark plug includes: a cylindrical insulator; a center electrode, held on an inner circumferential side of the insulator, protruding from the insulator toward a tip end side; a cylindrical housing holding the insulator on an inner circumferential side; a ground electrode forming a discharge gap between the ground electrode and the center electrode on the inner circumferential side of the housing; and a plug cover provided in a tip end portion of the housing to cover a pre-combustion chamber in which the discharge gap is arranged. The plug cover is provided with an injection hole that communicates the pre-combustion chamber to the outside. The ground electrode includes a discharge-side end portion that faces the discharge gap and a joining-side end portion that is joined to the housing. The discharge-side end portion is arranged further toward a base end side in an axial direction than the joining-side end portion is.
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公开(公告)号：US11719153B2
公开(公告)日：2023-08-08
申请号：US17732317
申请日：2022-04-28
申请人： DENSO CORPORATION
发明人： Shota Kinoshita , Akimitsu Sugiura
摘要： An ignition device of the present embodiment is an ignition device for an internal combustion and includes an ignition plug, an operating information acquisition unit and an ignition control unit. The ignition plug includes an accessory chamber and an injection hole from which flame is to be injected from the accessory chamber to a main combustion chamber. The operating information acquisition unit is configured to acquire operating information regarding an operating state of the internal combustion. The ignition control unit is configured to control an ignition energy profile that affects an ignition state of an air-fuel mixture based on the operating information acquired by the operating information acquisition unit.
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