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公开(公告)号：US12142417B2
公开(公告)日：2024-11-12
申请号：US18449742
申请日：2023-08-15
Applicant: DENSO CORPORATION
Inventor： Norihiro Adachi , Kanechiyo Terada , Tetsuya Miwa
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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公开(公告)号：US11367567B2
公开(公告)日：2022-06-21
申请号：US17448741
申请日：2021-09-24
Applicant: DENSO CORPORATION
Inventor： Norihiro Adachi , Kanechiyo Terada , Tetsuya Miwa
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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公开(公告)号：US11125201B2
公开(公告)日：2021-09-21
申请号：US17126668
申请日：2020-12-18
Applicant: DENSO CORPORATION
Inventor： Kanechiyo Terada , Tetsuya Miwa
Abstract: An ignition control system for an internal combustion engine includes a controller, which includes an IGT generating section and an IGW generating section and is connected to ignition devices through an IGT signal line and an IGW signal line. The IGW signal line includes bifurcated portions, which sequentially bifurcate from a common main signal line. The bifurcated portions each correspond to one of the ignition devices and include a branched line, which is connected to an energy supply circuit inside the corresponding ignition device.
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公开(公告)号：US10938184B2
公开(公告)日：2021-03-02
申请号：US16931782
申请日：2020-07-17
Applicant: DENSO CORPORATION
Inventor： Yuuki Kawata , Masamichi Shibata , Kanechiyo Terada , Tetsuya Miwa
Abstract: A spark plug has a housing, an insulator, a central electrode and a ground electrode. At least one projection part is formed on an outer peripheral surface of the insulator at a location facing a distal end cylindrical surface of the insulator in a radial direction of the spark plug so that at least one projection part has a minimum distance measured from a plug central axis of the spark plug, which is longer than a distance of another part of the insulator measured from the plug central axis. On a cross section of the spark plug, at least one projection part is formed on the outer peripheral surface of the insulator in a direction between at least one projection part and the plug central axis which crosses to a direction between a rod-shaped part and the plug central axis.
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公开(公告)号：US10041463B2
公开(公告)日：2018-08-07
申请号：US15302552
申请日：2015-04-09
Applicant: DENSO CORPORATION
Inventor： Makoto Toriyama , Shunichi Takeda , Kanechiyo Terada , Satoru Nakayama , Takashi Oono
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.
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Patent Agency Ranking
公开(公告)号：US09793687B2
公开(公告)日：2017-10-17
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.
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公开(公告)号：US11891972B2
公开(公告)日：2024-02-06
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：US11215157B2
公开(公告)日：2022-01-04
申请号：US17103088
申请日：2020-11-24
Applicant: DENSO CORPORATION
Inventor： Kanechiyo Terada
Abstract: In an ignition control device for an internal-combustion engine, signal separation circuitry receives and separates an ignition control signal that is an integrated signal of a main ignition signal for controlling the main ignition operation, an energy input signal for controlling the energy input operation, and a target secondary current command signal. The ignition control signal is formed of a first signal and a second signal that are pulsed signals. The signal separation circuitry is configured to generate, from the ignition control signal, the main ignition signal based on rising edges of the first signal and the second signal as pulse-waveform information of the first signal and the second signal, generate the energy input signal based on a pulse width of the second signal as pulse-waveform information of the second signal, and generate the target secondary current command signal based on pulse-waveform information of the first signal.
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公开(公告)号：US11199170B2
公开(公告)日：2021-12-14
申请号：US16288520
申请日：2019-02-28
Applicant: DENSO CORPORATION
Inventor： Ippei Funato , Akimitsu Sugiura , Kanechiyo Terada
Abstract: In an ignition control device for controlling operation of an ignition apparatus, an ignition section has first and second electrodes disposed in a combustion chamber of an internal combustion engine. A voltage application between the first and second electrodes enables a discharge to be generated between the first and second electrodes for igniting a gas mixture in the combustion chamber. A voltage application section performs at least one application of a determination voltage between the first and second electrodes. An occurrence ratio acquisition section acquires a discharge occurrence ratio at the ignition section for the at least one application of the determination voltage. A comparison section compares the discharge occurrence ratio acquired by the occurrence ratio acquisition section with a predetermined determination threshold to thereby determine a degree of wear of at least one of the first and second electrodes.
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公开(公告)号：US09771918B2
公开(公告)日：2017-09-26
申请号：US14783898
申请日：2014-04-11
Applicant: DENSO CORPORATION
Inventor： Satoru Nakayama , Makoto Toriyama , Akimitsu Sugiura , Masahiro Ishitani , Yuuki Kondou , Kanechiyo Terada
IPC: F02P9/00 , F02P3/08 , F02P3/09 , F02P3/045 , F02P3/05 , F02P5/15 , F02P3/00 , F02P15/10 , F02P3/04
CPC classification number: F02P9/002 , F02P3/005 , F02P3/0407 , F02P3/0453 , F02P3/05 , F02P3/0876 , F02P3/09 , F02P5/1502 , F02P15/10 , Y02T10/46
Abstract: It is possible to adjust electromagnetic energy introduced from a low-voltage side of a primary winding 20 of an ignition coil 2 after start discharging to a spark plug 1 from the ignition coil 2 in the correct proportion by threshold-determining either one or both of a primary voltage V1 applied to a primary side of the ignition coil 2 and a secondary current I2 flowing in a secondary side of the ignition coil 2, and by opening and closing a discharging switch 32 disposed between an auxiliary power supply 3 including an energy storage coil 330 and a low-voltage side terminal 201 of the ignition coil 2.
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