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公开(公告)号：JP2013177888A
公开(公告)日：2013-09-09
申请号：JP2013020136
申请日：2013-02-05
Applicant: Denso Corp , 株式会社デンソー
Inventor： SHIBATA MASAMICHI , KAJITA YUJI , MIZUTANI ATSUYA , HATTORI KOICHI , IMANAKA TAISHIN
CPC classification number: H01T13/44 , F02P3/0407 , F02P3/0552 , F02P9/002
Abstract: PROBLEM TO BE SOLVED: To provide an ignition system which can restrict decreasing of a constant-voltage duration of a spark plug and consequently avoid occurrence of an accidental fire of an engine in an engine.SOLUTION: One of both ends of a secondary coil 12b is connected to a positive electrode side of a battery 14 through a low voltage side path L1, while the another end is connected to a center electrode 10a through a connection path L2. A constant-voltage path L3 whose one end is grounded is connected to the connection path L2. A block diode 18 is provided at the secondary coil 12b side rather than a connection point with the constant-voltage path L3 in the connection path L2, and a Zener diode 20 is provided at the constant-voltage path L3. Specifically, anodes of the block diode 18 and the Zener diode 20 are connected to each other.
Abstract translation: 要解决的问题：提供一种点火系统，其可以限制火花塞的恒定电压持续时间的降低，并且因此避免发动机在发动机中的意外火灾。解决方案：二次线圈12b的两端之一 通过低压侧路径L1与电池14的正极侧连接，另一端通过连接路径L2与中心电极10a连接。 一端接地的恒定电压路径L3连接到连接路径L2。 在次级线圈12b侧而不是与连接路径L2中的恒定电压路径L3的连接点设置块状二极管18，并且在恒定电压路径L3设置齐纳二极管20。 具体地，块二极管18和齐纳二极管20的阳极彼此连接。
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公开(公告)号：JP2013100811A
公开(公告)日：2013-05-23
申请号：JP2012200852
申请日：2012-09-12
Applicant: Denso Corp , 株式会社デンソー
Inventor： KAJITA YUJI , SHIBATA MASAMICHI , IMANAKA TAISHIN , MIZUTANI ATSUYA , OSUGA TSUTOMU
IPC: F02P3/04
CPC classification number: F02P13/00 , F02P3/04 , F02P3/051 , F02P3/053 , F02P3/0838 , F02P3/0884 , F02P9/00 , F02P15/00
Abstract: PROBLEM TO BE SOLVED: To compatibly achieve both controlling the plug consumption by avoiding occurrence of the phenomenon of discharge repetition and avoiding accident fire caused by insufficient discharge period.SOLUTION: An ignition device includes: a zener diode 40 (a limiting means) for limiting the primary voltage of an ignition coil 20 to be equal to or lower than the zener voltage V1ZD; and a switch circuit 50 (a changing means) which makes a change to stop the limit function by the zener diode 40 when the discharge is started, and to demonstrate the limit function for the predetermined period Tb after the discharge is started. Thus, in the predetermined period Tb after the discharge is started, the secondary voltage V2 is limited to be equal to or higher than the secondary limit value V2th (the absolute value of V2 is ≤V2th). Thus, Even when blowout occurs during the discharge, discharging again immediately after the blowout occurs can be avoided, and thereby, the plug consumption caused by the repeated discharge can be avoided. In addition, when the blowout does not occur, the discharge caused by the induction discharge can be continued as usual as it is, and thereby, any possibility of accident fire caused by the insufficient discharge period can be avoided.
Abstract translation: 要解决的问题：通过避免发生放电重复现象并避免由于放电时间不足引起的事故火灾，兼有控制插头消耗。 点火装置包括：用于将点火线圈20的初级电压限制在等于或低于齐纳电压V1ZD的齐纳二极管40（限制装置）; 以及开始电路50（改变装置），其在放电开始时使齐纳二极管40停止极限功能的变化，并且在放电开始之后显示预定时间段Tb的限制功能。 因此，在放电开始后的规定期间Tb中，次级电压V2被限制为等于或高于次级限制值V2th（V2的绝对值≤V2th）。 因此，即使在排出时发生喷出，也可以避免在喷出发生之后立即再次排出，从而可以避免由重复排出引起的堵头消耗。 此外，当不发生吹出时，由于感应放电引起的放电可以照原样继续，从而可以避免由于放电时间不足引起的任何可能的事故火灾。 版权所有（C）2013，JPO＆INPIT
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公开(公告)号：JP2010096112A
公开(公告)日：2010-04-30
申请号：JP2008268413
申请日：2008-10-17
Applicant: Denso Corp , 株式会社デンソー
Inventor： SHIBATA MASAMICHI , KAJITA YUJI
IPC: F02P3/01
Abstract: PROBLEM TO BE SOLVED: To solve problems of a plasma ignition device that the electric resistance of a discharge gap in an ignition plug is increased due to the influence of the wear of a central electrode or operation conditions of an engine, for example, the influence of pressure, a load, an air-fuel ratio or the like in a combustion chamber and plasma discharge omission occurs, thereby generating no desired plasma discharge and impairing stability in the ignition of the ignition plug.
SOLUTION: This plasma ignition device performs feedback control for increasing a plasma current value or a primary current value when a period of time Δt from the transmission of the first signal to an ECU 40 to the transmission of the second signal exceeds the predetermined period of a time due to an external cause, and prevents plasma discharge skip with respect to a first signal transmitted from a circuit 20 for spark discharge to the ECU 40 and a second signal transmitted from a circuit 30 for spark discharge to the ECU 40.
COPYRIGHT: (C)2010,JPO&INPITAbstract translation: 解决的问题：为了解决等离子体点火装置的问题，即由于中心电极的磨损或发动机的操作条件的影响，火花塞中的放电间隙的电阻增加，例如 燃烧室内的压力，负荷，空燃比等的影响发生，不产生期望的等离子体放电，并损害火花塞点火的稳定性。 解决方案：当从第一信号传输到ECU40到第二信号的传输的时间段Δt超过预定的时间时，该等离子体点火装置执行用于增加等离子体电流值或初级电流值的反馈控制 并且防止相对于从用于火花放电的电路20发送到ECU 40的第一信号的等离子体放电跳跃以及从用于火花放电的电路30发送到ECU 40的第二信号。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JP2008311018A
公开(公告)日：2008-12-25
申请号：JP2007156146
申请日：2007-06-13
Applicant: Denso Corp , 株式会社デンソー
Inventor： TANI TAISHIN , KAJITA YUJI , KATO HIDEYUKI , YOSHINAGA TORU
CPC classification number: H01T13/50 , F02P3/0407 , F02P9/007
Abstract: PROBLEM TO BE SOLVED: To provide a plasma type ignition device of excellent durability and ignitability. SOLUTION: A plasm type ignition device 1 comprises a plasma type ignition plug 10 consisting of a central electrode 110, an insulating member 120 holding the central electrode 110, and a ground electrode 130 arranged outside the central electrode 110 with the insulating member 120 in between. In the plasma type ignition device, a high-voltage and a large current are applied from high-voltage sources 20 and 30 to put the gas in a discharge space 140 formed between the central electrode 110 and the ground electrode 130 into a plasma state of high temperature and high pressure, which is injected into an internal combustion engine 40 for ignition. The discharge space 140 is a groove formed on a lower surface 126 of the insulating member 120. A part of the central electrode 110 and a part 131 of the ground electrode 130 are made to face each other in the groove 121, for discharging between both electrodes. With this configuration, the gas in plasma state is quickly released from the groove 121 opened across the entire surface to the internal combustion engine 40, for use for ignition with no loss of thermal energy. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题：提供耐久性和点火性优异的等离子体点火装置。 解决方案：等离子体型点火装置1包括由中心电极110，保持中心电极110的绝缘构件120和布置在中心电极110外侧的接地电极130组成的等离子体型火花塞，绝缘构件 120之间。 在等离子体点火装置中，从高电压源20和30施加高电压和大电流，将形成在中心电极110和接地电极130之间的放电空间140中的气体放入等离子体状态 高温高压被注入内燃机40中进行点火。 放电空间140是形成在绝缘构件120的下表面126上的槽。中心电极110的一部分和接地电极130的一部分131在槽121中彼此面对，以在两者之间放电 电极。 利用这种构造，等离子体状态的气体从跨越整个表面打开的槽121迅速地释放到内燃机40，用于点燃而不损失热能。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2004361119A
公开(公告)日：2004-12-24
申请号：JP2003156815
申请日：2003-06-02
Applicant: Denso Corp , Nippon Soken Inc , 株式会社デンソー , 株式会社日本自動車部品総合研究所
Inventor： TAKEDA KENJI , FUKAYA SHIGETOSHI , SANO AKIRA , KAJITA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide a rotational angle detector with no detection error due to changes in the direction of a magnetic flux to a magnetic detection chip.
SOLUTION: Polarizing directions of a magnetic flux imparting magnet 11 and a magnetic flux attracting magnet 12 in the direction of the rotation axis are opposite. Because of this, even when the magnets are located a distance L apart from a magnetic detection chip 3 in the direction of the rotational axis, a magnetic flux a1 can be applied to the magnetic detection chip 3. As a result, the magnetic detection chip 3 which is located at a position where a shielding member is placed in-between can detect a rotational angle of a magnetic flux generating means 5. By providing the magnetic flux imparting magnet 11 and the magnetic flux attracting magnet 12 in parallel with sufficient length, even if there exists an assembly deviation between the magnetic flux generating means 5 and the magnetic detection chip 3, a magnetic flux corresponding to a rotational angle can be applied to the magnetic detection chip 3, thereby preventing errors.
COPYRIGHT: (C)2005,JPO&NCIPI-
Patent Agency Ranking
公开(公告)号：JP2001207932A
公开(公告)日：2001-08-03
申请号：JP2000017174
申请日：2000-01-26
Applicant: DENSO CORP
Inventor： KURODA CHIKAHIKO , SANO AKIRA , KAJITA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide an electronic control type fuel injection device capable of reducing cost by abolishing a pulsation damping device and quickly damping fuel pressure pulsation generated when an injector 2 is injected. SOLUTION: A pressure accumulating tank 3 is provided with a pressure accumulating chamber 3a for storing fuel supplied from a fuel pump 1 and a diaphragm 3b for receiving fuel pressure of the pressure accumulating chamber 3a. The diaphragm 3b displaces to a position where fuel pressure of the pressure accumulating chamber 3a and energizing force of a spring 3d are balanced. In the pressure accumulating tank 3, an outflow port 3g is connected with a fuel entrance 2a of an injector 2 and is supported by a throttle body 5 via a stay. When fuel pressure pulsation is generated according to injection from the injector 2, the pressure accumulating tank 3 is capable of quickly damping fuel pressure pulsation because the diaphragm 3b absorbs pressure fluctuation when the pressure fluctuation is transmitted to the pressure accumulating chamber 3a.
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公开(公告)号：JP2013083205A
公开(公告)日：2013-05-09
申请号：JP2011223858
申请日：2011-10-11
Applicant: Denso Corp , 株式会社デンソー
Inventor： KAJITA YUJI
IPC: F02P15/10
Abstract: PROBLEM TO BE SOLVED: To suppress consumption of a plug caused by avoidance of a discharge blow off and repetition of discharge.SOLUTION: An ignition system of an internal combustion engine includes: an ignition coil 20 including a primary coil 21 and a secondary coil 22 and outputting a secondary current I2 to an ignition plug 30; a DC-DC converter 40 (power supply unit) for outputting a discharge-sustaining current I3 to the ignition plug 30; and an ECU 5 (discharge controller) for controlling discharge such that the discharge starts with an output voltage from the secondary coil 22 and the discharge ends by an output stop of the discharge-sustaining current I3. The DC-DC converter 40 is electrically connected to the ignition plug 30 so that the discharge-sustaining current I3 is supplied to the ignition plug 30 without passing through the secondary coil 22.
Abstract translation: 要解决的问题：抑制由于避免放电吹出和重复放电而导致的插头的消耗。 解决方案：内燃机的点火系统包括：点火线圈20，其包括初级线圈21和次级线圈22，并将二次电流I2输出到火花塞30; 用于向火花塞30输出放电维持电流I3的DC-DC转换器40（电源单元） 以及用于控制放电的ECU5（放电控制器），使得放电以来自次级线圈22的输出电压开始，并且通过放电维持电流I3的输出停止来进行放电。 DC-DC转换器40电连接到火花塞30，使得放电维持电流I3不通过次级线圈22被提供给火花塞30.（C）2013，JPO和INPIT
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公开(公告)号：JP2011064191A
公开(公告)日：2011-03-31
申请号：JP2009283697
申请日：2009-12-15
Applicant: Denso Corp , 株式会社デンソー
Inventor： KATO HIDEYUKI , YOSHINAGA TORU , ARAKAWA MIYAO , KAJITA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide a highly reliable plasma ignition device for surely igniting a hard-to-ignite combustion engine while improving the probability of igniting high-fuel-concentration portions of extremely lean mixture having a high air-fuel ratio by enabling ignition sources to be produced several times at selective ignition timings.
SOLUTION: The plasma ignition device includes an electronic control device ECU for issuing a plurality of ignition signals IGt
n and a charge/discharge selecting signal T
n G, if necessary, depending on the operating conditions of the internal combustion engine, a multiple trigger discharge means 20 including a driving voltage regulating means 21 for converting an ignition signal IGt
n into driving voltage and at least one high voltage generating means 22 to be driven in accordance with the ignition signal IGt
n , and a multiple plasma current supply means 30 including a plasma current accumulating means 32 for accumulating at least one plasma current and at least one charge/discharge selecting means 31 for selecting the charge/discharge of the plasma current accumulating means 32 in accordance with the charge/discharge selecting signal T
n G.
COPYRIGHT: (C)2011,JPO&INPITAbstract translation: 要解决的问题：提供一种高可靠性的等离子体点火装置，用于可靠地点燃难燃点燃的内燃机，同时提高点燃具有高空燃比的极浓混合物的高燃料浓度部分的可能性 通过在选择性点火时间使点火源多次产生。 解决方案：等离子体点火装置包括用于发出多个点火信号IGt
n 的充电/放电选择信号T n G的电子控制装置ECU，如果 根据内燃机的工作条件，需要多个触发放电装置20，该多个触发放电装置20包括用于将点火信号IGt n 转换为驱动电压的驱动电压调节装置21和至少一个产生高电压的电压 根据点火信号IGt n 驱动的装置22以及包括用于累积至少一个等离子体电流和至少一个充电/放电的等离子体电流累积装置32的多等离子体电流供给装置30 选择装置31，用于根据充电/放电选择信号T G选择等离子体电流累积装置32的充电/放电。 版权所有（C）2011，JPO＆INPIT -
公开(公告)号：JP2010019203A
公开(公告)日：2010-01-28
申请号：JP2008182163
申请日：2008-07-14
Applicant: Denso Corp , 株式会社デンソー
Inventor： KATO HIDEYUKI , YOSHINAGA TORU , KAJITA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide a plasma type ignition device to conduct ignition by injecting high-temperature and high-voltage plasma into a combustion chamber of an internal combustion engine, capable of exerting excellent ignition performance and having high reliability. SOLUTION: The plasma type ignition device 1 is equipped with an ignition plug 10 having a center electrode 11, a ground electrode 130, and an electric discharge space 140 bounded by an insulation body 12 to insulate them, and a high-energy power supply to supply high energy to the ignition plug 10, and is configured so that the high energy is applied to the gas in the discharge space 140 to generate a high-temperature and high-voltage plasma state and the plasma is injected into the combustion chamber 400 of the engine 40 from an opening at the ground electrode 130 so as to make ignition on the mixture gas wherein, as the high energy power supply, a multiple-time trigger plasma power supply MTPDS 20 is provided, and the MTPDS 20 conducts trigger discharges a plurality of times per one ignition, and feeds a high-energy plasma current I PLZ into the space 140 which is insulation-broken by the trigger discharges. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：提供一种等离子体点火装置，通过将高温高压等离子体注入内燃机的燃烧室中，能够发挥出色的点火性能和高可靠性，从而进行点火。 解决方案：等离子体点火装置1配备有具有中心电极11，接地电极130和由绝缘体12限界以将其绝缘的放电空间140的火花塞10和高能量 向火花塞10提供高能量的电源，并且被配置为使得高能量被施加到放电空间140中的气体以产生高温和高电压等离子体状态，并且将等离子体注入燃烧 发动机40的腔室400从接地电极130的开口处开始点火，其中作为高能量电源提供多次触发等离子体电源MTPDS 20，并且MTPDS 20进行 触发器每次点火多次放电，并将高能量等离子体电流I SBM PLZ 馈送到被触发放电绝缘断开的空间140中。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JP2009156251A
公开(公告)日：2009-07-16
申请号：JP2008177514
申请日：2008-07-08
Applicant: Denso Corp , 株式会社デンソー
Inventor： KATO HIDEYUKI , YOSHINAGA TORU , KAJITA YUJI
Abstract: PROBLEM TO BE SOLVED: To improve durability of a plasm type ignition device more by restricting over-discharge after ignition. SOLUTION: This plasma type ignition device 1 is structured of an ignition plug 10 and a high-energy power source formed of a trigger discharge means 20, which comprises a power source 21, an ignition coil 23 for raising voltage of the power source 21 and an ignition coil driving circuit 24 to be controlled to be opened/closed by an electronic control device 25 so as to control drive of the ignition coil 23, and a plasma energy supply means 30, which comprises a plasma generating capacitor 33 to be charged by a power source 31. This plasma type ignition device 1 ignites an internal combustion engine 40, maintaining gas inside of a discharge space 140 in plasma condition, by applying high-voltage Vsc from the trigger discharge means 20 and supplying large current Ipl from the plasma energy supply means 30. At this point, discharge from the trigger discharge means 20 is set at 60 μsec or less. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题：通过限制点火后的过放电，可以提高等离子体点火装置的耐久性。 解决方案：该等离子体点火装置1由火花塞10和由触发放电装置20形成的高能电源构成，触发放电装置20包括电源21，用于提高功率的电压的点火线圈23 源21和点火线圈驱动电路24被控制为由电子控制装置25打开/关闭以控制点火线圈23的驱动;以及等离子体能量供给装置30，其包括等离子体产生电容器33至 该等离子体点火装置1通过从触发放电装置20施加高电压Vsc并点燃内燃机40，从而在等离子体状态下保持放电空间140内部的气体，并提供大电流Ipl 此时，从触发放电单元20的放电设定为60μsec以下。 版权所有（C）2009，JPO＆INPIT
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