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公开(公告)号：US20210388805A1
公开(公告)日：2021-12-16
申请号：US17412785
申请日：2021-08-26
Applicant: DENSO CORPORATION
Inventor： Keiko MIYAKE , Takashi OHNO , Kanechiyo TERADA
Abstract: An ignition device for an internal combustion engine includes: an ignition plug; a primary coil; a secondary coil magnetically linked to the primary coil and connected to the ignition plug; a main ignition circuit causing a spark discharge to occur in the ignition plug; an energy supply circuit that supplies and stops electrical energy to the predetermined winding of the primary coil to accordingly cause the spark discharge to continue; a recirculation circuit that permits and prohibits current recirculation through a recirculation path including the predetermined winding; and a controller configured to: control the main ignition circuit, and determine a start time of a permission of the current recirculation by the recirculation circuit using, as a trigger, the interruption signal which causes the main ignition circuit to interrupt the current through the primary coil, and end the permission after a predetermined time period has elapsed since the start time.
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公开(公告)号：US20210079880A1
公开(公告)日：2021-03-18
申请号：US17102982
申请日：2020-11-24
Applicant: DENSO CORPORATION
Inventor： Kanechiyo TERADA
Abstract: An ignition control device is provided with an ignition coil including a primary coil and a secondary coil, a main ignition circuit performing a main ignition operation, an energy input circuit that performs an energy input operation for superposing a current having the same polarity to a secondary current, in which a signal generation circuit is provided to generate, based on a main ignition signal that controls the main ignition operation, at least one of an energy input signal controlling the energy input operation and a target secondary current command signal commanding a target secondary current value.
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公开(公告)号：US20190120198A1
公开(公告)日：2019-04-25
申请号：US16166542
申请日：2018-10-22
Applicant: DENSO CORPORATION
Inventor： Keiko MIYAKE , Shunichi TAKEDA , Kanechiyo TERADA , Tetsuya MIWA
Abstract: In an ignition apparatus, a controller outputs a discharge start signal instructing a start of a discharge in the spark plug, and a discharge control signal instructing control of a discharge current in the spark plug after the start of the discharge. A signal line connects between the controller and a control circuit. The discharge start signal and the discharge control signal are transferred from the controller to the control circuit via the signal line. The controller modulates, based on the plural command values, the discharge control signal such that the modulated discharge control signal includes information representing the plural command values and change timings for the respective command values. The control circuit controls, based on the discharge start signal and the modified discharge control signal, the energization circuit to thereby adjust the discharge current to each of the command values at a corresponding one of the change timings.
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公开(公告)号：US20170022961A1
公开(公告)日：2017-01-26
申请号：US15302552
申请日：2015-04-09
Applicant: DENSO CORPORATION
Inventor： Makoto TORIYAMA , Shunichi TAKEDA , Kanechiyo TERADA , Satoru NAKAYAMA , Takashi OONO
CPC classification number: F02P3/08 , F02P3/0442 , F02P3/0892 , F02P5/15 , F02P9/00 , F02P9/007 , F02P15/10
Abstract: According to an ignition device, a first switching unit applies a voltage between electrodes of by spark plug by turning on/off energization from an on-vehicle battery to a primary coil. Further, a second switching unit applies a voltage having the same direction as a spark discharge generated by turning on/off the first switching unit between the electrodes of the spark plug by supplying electrical energy accumulated in a booster circuit into a primary coil. Accordingly, it is possible to greatly reduce a complexity of the on/off switching of the first and second switching units compared to a conventional technology.
Abstract translation: 根据点火装置，第一开关单元通过从车载电池接通/断开通电至初级线圈，通过火花塞的电极之间施加电压。 此外，第二开关单元通过将升压电路中蓄积的电能提供给初级线圈，施加与火花塞的电极之间接通/断开第一开关单元产生的火花放电相同的方向的电压。 因此，与传统技术相比，可以大大降低第一和第二开关单元的接通/断开切换的复杂性。
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公开(公告)号：US20230395318A1
公开(公告)日：2023-12-07
申请号：US18449742
申请日：2023-08-15
Applicant: DENSO CORPORATION
Inventor： Norihiro ADACHI , Kanechiyo TERADA , Tetsuya MIWA
CPC classification number: H01F38/12 , F02P3/02 , F02P13/00 , H01F2038/122
Abstract: An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.
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Patent Agency Ranking
公开(公告)号：US20200112144A1
公开(公告)日：2020-04-09
申请号：US16590653
申请日：2019-10-02
Applicant: DENSO CORPORATION
Inventor： Yuuki KAWATA , Fumiaki AOKI , Daisuke TANAKA , Ryota WAKASUGI , Akimitsu SUGIURA , Kanechiyo TERADA , Tetsuya MIWA
Abstract: A spark plug for an internal combustion engine includes a housing, an insulator, and a center electrode. The center electrode includes an inside electrode portion and an outside electrode portion. The housing includes a ground electrode projecting from a distal end portion of the housing toward the distal end side of the plug at a part in a plug circumferential direction. The outside electrode portion projects along a surface of the insulator tip in a direction away from a boundary with the inside electrode portion and includes a projection, which is capable of causing an electrical discharge between the ground electrode and the outside electrode portion. The projection is formed in a region in the plug circumferential direction. The projection and the ground electrode are located at positions different from each other in the plug circumferential direction.
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公开(公告)号：US20200036165A1
公开(公告)日：2020-01-30
申请号：US16520392
申请日：2019-07-24
Applicant: DENSO CORPORATION
Inventor： Ryota WAKASUGI , Fumiaki AOKI , Daisuke TANAKA , Akimitsu SUGIURA , Tetsuya MIWA , Kanechiyo TERADA
IPC: H01T13/20
Abstract: In a spark plug for an internal combustion engine, a cylindrical insulator is arranged radially inside a cylindrical ground electrode, and includes an insulator protruding portion protruding further toward a distal end side in an axial direction than a distal end of the ground electrode. A center electrode is held radially inside the insulator, and includes an exposed portion exposed from a distal end of the insulator protruding portion. The spark plug generates a discharge from the exposed portion to the ground electrode, in a discharge gap formed along a surface of the insulator protruding portion. At least one of the exposed portion and the insulator protruding portion includes a flow inlet that is open on an outer circumferential surface thereof, a flow outlet that is open toward the discharge gap, and a communication passage communicating between the flow inlet and the flow outlet.
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公开(公告)号：US20200028333A1
公开(公告)日：2020-01-23
申请号：US16584998
申请日：2019-09-27
Applicant: DENSO CORPORATION
Inventor： Shintaro ITOH , Daisuke TANAKA , Akimitsu SUGIURA , Ryota WAKASUGI , Kaori DOI , Kanechiyo TERADA , Tetsuya MIWA , Fumiaki AOKl
Abstract: A spark plug has a tubular ground electrode, an insulator, and a center electrode. The insulator has an insulator protruding portion protruding to a tip end side in a plug axial direction with respect to the ground electrode. The center electrode 4 has an exposed portion exposed through a tip end of the insulator protruding portion. The exposed portion of the center electrode has a first part covering the insulator protruding portion from the tip end side in the plug axial direction, and a second part extending from the first part to a base end side in the plug axial direction and covering the entire circumference of an outer peripheral surface of the insulator protruding portion from an outer peripheral side in a plug radial direction.
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公开(公告)号：US20190040834A1
公开(公告)日：2019-02-07
申请号：US16052889
申请日：2018-08-02
Applicant: DENSO CORPORATION
Inventor： Noriaki NISHIO , Kanechiyo TERADA
CPC classification number: F02P3/05 , F02P3/0892 , F02P9/007 , F02P17/12 , F02P2017/121
Abstract: An ignition device includes an ignition coil, an ignition plug and ignition control unit. The ignition control unit includes a secondary current adjusting unit that adjusts, in each cycle, an amount of the secondary current after initiating the discharge, a discharge extension detecting unit that detects an amount of extension of the discharge, and a short determination unit that determines whether a discharge-short has occurred. The ignition control unit controls the secondary current control unit such that a first step and a second step are repeatedly executed. The first step decreases the secondary current while keeping the secondary current higher than a predetermined lower current limit, when the extension amount detected by the discharge extension detecting unit is a predetermined extension amount or more. The second step increases the secondary current when the short determination unit determines that a discharge-short has occurred.
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公开(公告)号：US20170077679A1
公开(公告)日：2017-03-16
申请号：US15266072
申请日：2016-09-15
Applicant: DENSO CORPORATION
Inventor： Masataka DEGUCHI , Masamichi SHIBATA , Kanechiyo TERADA , Tetsuya MIWA , Hironori OSAMURA , Yuuki TSUKAMOTO
Abstract: A spark plug for an internal combustion engine is provided which includes a housing, a porcelain insulator, a center electrode, and an annular ground electrode. The housing has a small-diameter portion which has a smaller inner diameter and defines a front end thereof. The ground electrode is secured to a front end surface of the small-diameter portion and forms a spark gap between itself and an outer periphery of the center electrode. A pocket is formed between the inner periphery of the housing and a portion of the porcelain insulator which is located closer to a front end of the porcelain insulator than the mounting shoulder is. An air vent extends from outside the ground electrode in a radial direction of the spark plug to the pocket to establish communication between the pocket and the combustion chamber of the internal combustion engine.
Abstract translation: 提供了一种用于内燃机的火花塞，其包括壳体，瓷绝缘体，中心电极和环形接地电极。 壳体具有小直径部分，其具有较小的内径并限定其前端。 接地电极被固定到小直径部分的前端表面，并且在其自身与中心电极的外周之间形成火花隙。 在壳体的内周和陶瓷绝缘体的比安装肩部更靠近瓷绝缘体的前端的部分之间形成有口袋。 排气孔从火花塞的径向方向从接地电极的外部延伸到口袋，以在内燃机的口袋和燃烧室之间建立连通。
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