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公开(公告)号：DE10148690B4
公开(公告)日：2014-02-27
申请号：DE10148690
申请日：2001-10-02
Applicant: DENSO CORP
Inventor： MORITA HITOSHI , OKABE SHINICHI , KATO TAKEHIKO , YORITA HIROSHI , KANAO KEIJI , MIWA TETSUYA
Abstract: Zündvorrichtung mit einer Zündkerze und einer Zündspannungsquelle (50), wobei die Zündkerze mit einer Mittelelektrode (32) und einer Masseelektrode (42) versehen ist, die einander gegenüberliegend beabstandet sind, zumindest die Masseelektrode (42) aus einer Iridiumlegierung besteht, ein Funkenspalt (R1) zwischen der Mittelelektrode (32) und der Masseelektrode (42) weniger als 1,1 mm beträgt, Querschnitte (S1, S2) der Mittelelektrode (32) und der Masseelektrode (42) in einem kugelförmigen Bereich, in dem ein Abstand (R2) von einem Mittelpunkt (P) des Funkenspalts (R1) innerhalb von 0,6 mm hegt, kleiner oder gleich 0,95 mm2 sind und der Querschnitt (S2) der Masseelektrode (42) kleiner als der Querschnitt (S1) der Mittelelektrode (32) ist, dadurch gekennzeichnet, dass die Zündspannungsquelle (50) dazu dient, an die Masseelektrode (42) eine erste Spannung anzulegen und an die Mittelelektrode (32) eine zweite Spannung anzulegen, die höher als die erste Spannung ist.
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公开(公告)号：DE10357507A1
公开(公告)日：2004-07-01
申请号：DE10357507
申请日：2003-12-09
Applicant: DENSO CORP
Inventor： SHIBATA MASAMICHI , HORI TSUNENOBU , MORITA HITOSHI , OKABE SHINICHI
Abstract: A spark plug is composed of a main metal fitting having a cylindrical structure, an insulator disposed inside the cylindrical main metal fitting, a center electrode fitted in the insulator in a manner that a front end portion of the center electrode projects outward over one end of the insulator, and a grounding electrode mounted to the main metal fitting and having one end portion opposing to the front end portion of the center electrode through a discharge gap therebetween. The front end portion of the center electrode includes a conical portion having a tapered surface having a taper angle of less than 80°, and a columnar portion formed to a top end portion of the conical portion so as to have a diameter in a range of 0.4 mm to 0.8 mm.
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公开(公告)号：DE10148690A1
公开(公告)日：2002-05-23
申请号：DE10148690
申请日：2001-10-02
Applicant: DENSO CORP
Inventor： MORITA HITOSHI , OKABE SHINICHI , KATO TAKEHIKO , YORITA HIROSHI , KANAO KEIJI , MIWA TETSUYA
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公开(公告)号：JP2004176653A
公开(公告)日：2004-06-24
申请号：JP2002345367
申请日：2002-11-28
Applicant: Denso Corp , Nippon Soken Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 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： YORITA HIROSHI , OKABE SHINICHI , MORITA HITOSHI , SHIBATA MASAMICHI , MIWA TETSUYA , ICHISE MASAHARU , KASHIWAKURA TOSHIMI , KANDA MUTSUMI
CPC classification number: Y02T10/125
Abstract: PROBLEM TO BE SOLVED: To provide a spark igniter of a one-cylinder two-point ignition type in which secure ignition and favorable combustion can be realized.
SOLUTION: For two-point ignition, two flame surfaces generate higher pressure than that around them, and mutual action of the two flames is generated to push each other. The two flames are thus more quickly grown toward peripheral parts of a combustion chamber than to a center part of the combustion chamber. Taking size of a line through center parts of two pairs of electrodes 11, 12, 21, and 22 for reference size, distance L1 between the center parts of the respective electrode pairs is set to be over 2 mm, and less than 1/2 of the reference size. Effect of two-point ignition is thus securely achieved, and more secure ignition and favorable combustion can be realized.
COPYRIGHT: (C)2004,JPOAbstract translation: 要解决的问题：提供一种可以实现安全点火和良好燃烧的单缸二点式点火式火花点火器。
解决方案：对于两点点火，两个火焰表面产生比其周围的更高的压力，并且产生两个火焰的相互作用以彼此推动。 因此，两个火焰比燃烧室的中心部分更快地朝向燃烧室的周边部分生长。 以两对电极11,12,21和22的中心部分为基准尺寸，将各电极对的中心部分之间的距离L1设定为2mm以上，小于1/2 的参考尺寸。 因此可以实现两点点火的效果，并且可以实现更安全的点火和良好的燃烧。 版权所有（C）2004，JPO
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公开(公告)号：JP2004011465A
公开(公告)日：2004-01-15
申请号：JP2002163125
申请日：2002-06-04
Applicant: NIPPON SOKEN , DENSO CORP
Inventor： MORITA HITOSHI , YORITA HIROSHI , OKABE SHINICHI , MIWA TETSUYA , SHIBATA MASAMICHI , YOSHINAGA TORU
Abstract: PROBLEM TO BE SOLVED: To perform ignition at plural places in each cylinder while avoiding the cost increase and larger size of an igniting power supply. SOLUTION: A pair of diodes 108, 109 electrically connected to each other in the opposite directions are provided between a spark plug 1 having a pair of discharge gaps G1, G2 and an igniting power supply 2 for applying high voltage to the spark plug 1 with the generation of AC voltage. When the voltage of the igniting power supply 2 is positive, high voltage is applied to one discharge gap, and when the voltage of the igniting power supply 2 is negative, high voltage is applied to the other discharge gap. High voltage can be applied to the pair of discharge gaps G1, G2 using one igniting power supply 2, and so conventional igniting power supplies can be reduced to half. COPYRIGHT: (C)2004,JPO
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Patent Agency Ranking
公开(公告)号：JP2002310045A
公开(公告)日：2002-10-23
申请号：JP2001110587
申请日：2001-04-09
Applicant: NIPPON SOKEN , DENSO CORP
Inventor： YORITA HIROSHI , MORITA HITOSHI , MIWA TETSUYA , KANO KEIJI
Abstract: PROBLEM TO BE SOLVED: To secure always excellent ignitability in a spark igniter for an internal combustion engine having an ignition coil and a spark plug. SOLUTION: This spark igniter has an intermitting means 4 for intermitting an electric current flowing to a primary winding 201 from a power source 3, a control means 6 for controlling time for making the electric current flow to the primary winding 201 from the power source 3 by controlling the intermitting means 4, and a discharge time measuring means 7 for outputting a discharge time signal to the control means 6 by measuring discharge time of the spark plug 1. The control means 6 controls the intermitting means 4 on the basis of the discharge time signal so that the discharge time of the spark plug 1 becomes a prescribed time or more. Thus, for example, even if an interelectrode gap changes by abrasion of an electrode of the spark plug 1, the always excellent ignitability can be secured.
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公开(公告)号：JP2002184551A
公开(公告)日：2002-06-28
申请号：JP2001257971
申请日：2001-08-28
Applicant: NIPPON SOKEN , DENSO CORP
Inventor： MORITA HITOSHI , OKABE SHINICHI , KATO TAKEHIKO , KANO KEIJI , MIWA TETSUYA , YORITA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a spark plug which can maintain ignitability even by making the discharge gap small. SOLUTION: At least either of a center electrode 32 and a ground electrode facing apart each other is made of an iridium alloy, and the distance R1 between the center electrode 32 and the ground electrode 42 is less than 1.1 mm, and, further, the cross-section area S1, S2 of the center electrode and the ground electrode where the distance R2 from the center point P of the both electrodes is not more than 0.6 mm, is 0.95 mm2 or less.
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公开(公告)号：JP2006120649A
公开(公告)日：2006-05-11
申请号：JP2005327852
申请日：2005-11-11
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： MORITA HITOSHI , OKABE SHINICHI , KATO TAKEHIKO , KANAO KEIJI , MIWA TETSUYA , YORITA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a spark plug capable of securing ignitability even if a discharge gap is shortened for miniaturizing it.
SOLUTION: In the spark plug having a center electrode 32 and a ground electrode 42 facing apart each other, the ground electrode is formed of a noble metal alloy having a work function below 5 eV. When it is assumed that the distance between the center electrode and the ground electrode is R1, the cross-sectional area of a part of the ground electrode positioned in a region where a distance R2 from the midpoint P of the distance R1 is not greater than 1/2×R1+0.1 mm is set not larger than 0.95 mm
2 .
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：即使缩短放电间隙来提供能够确保点火性的火花塞，以使其小型化。 解决方案：在具有彼此面对的中心电极32和接地电极42的火花塞中，接地电极由功函数低于5eV的贵金属合金形成。 当假设中心电极和接地电极之间的距离为R1时，位于距离R1的中点P的距离R2的区域中的接地电极的一部分的横截面积不大于 1/2×R1 + 0.1mm设定为不大于0.95mm
2 。 版权所有（C）2006，JPO＆NCIPI -
公开(公告)号：JP2005235789A
公开(公告)日：2005-09-02
申请号：JP2005145108
申请日：2005-05-18
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： MORITA HITOSHI , OKABE SHINICHI , KATO TAKEHIKO , KANAO KEIJI , MIWA TETSUYA , YORITA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a spark plug to secure ignitability, even if a discharge gap is shortened for advancing size reduction.
SOLUTION: In the spark plug having a center electrode (30) and a ground electrode (40) facing apart each other, the center electrode has a taper shape base part (31) tapering toward the tip part of the center electrode, and a center electrode chip (32) made of iridium alloy and mounted on the tip of the base part. The distance (R1) between the center electrode and the ground electrode is smaller than 1.1 mm. Cross-sectional areas (S1, S2) of the parts of the center electrode and the ground electrode positioned in the sphere where a distance (R2) from the midpoint (P) of the distance are longer than 0.6 mm are not larger than 0.95 mm
2 respectively.
COPYRIGHT: (C)2005,JPO&NCIPIAbstract translation: 要解决的问题：为了提供火花塞以确保点火性，即使为了推进尺寸减小而缩短放电间隙。 解决方案：在具有中心电极（30）和接地电极（40）彼此面对的火花塞中，中心电极具有朝向中心电极的尖端部分逐渐变细的锥形基部（31） 和由铱合金制成的中心电极芯片（32），并安装在基部的尖端上。 中心电极和接地电极之间的距离（R1）小于1.1mm。 位于距离中点（P）的距离（R2）大于0.6mm的球体中的中心电极和接地电极的部分的横截面积（S1，S2）不大于0.95mm
2 分别。 版权所有（C）2005，JPO＆NCIPI -
公开(公告)号：JP2005056786A
公开(公告)日：2005-03-03
申请号：JP2003288826
申请日：2003-08-07
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： YORITA HIROSHI , OKABE SHINICHI , MORITA HITOSHI , BORIKO MADOKA
CPC classification number: H01T13/39
Abstract: PROBLEM TO BE SOLVED: To materialize a configuration suitable for miniaturization and stabilization of a discharge position, in a spark plug wherein cylinder parts are provided in a portion where a center electrode faces a grounding electrode, and one end faces of both cylinder parts face each other through a discharge gap. SOLUTION: The diameter T1 of the cylinder part 35 on the center electrode 30 side and the diameter T2 of the cylinder part 45 on the grounding electrode 40 side are both 1.1 mm or less. The axis 35b of the cylinder part 35 on the center electrode 30 side is mutually parallel with the axis 45b of the cylinder part 45 on the grounding electrode 40 side, and they are shifted from each other so that when either one of the axes is extended, the other axis does not exist on the extended line. The displacement x of both of these axes 35b, 45b is 0.05 mm or more, and is not more than the radius of the thicker cylinder part out of both cylinder parts 35, 45. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：为了实现适于放电位置的小型化和稳定化的配置，在火花塞中，其中气缸部件设置在中心电极面对接地电极的部分中，并且两个气缸的一个端面 零件通过放电间隙彼此面对。 解决方案：中心电极30侧的圆筒部35的直径T1和接地电极40侧的圆筒部45的直径T2均为1.1mm以下。 中心电极30侧的圆筒部35的轴35b与接地电极40侧的圆筒部45的轴线45b相互平行，并且彼此偏移，使得当轴中的任一个延伸 延长线上不存在另一轴。 这两个轴35b，45b的位移x为0.05mm以上，并且不大于两个气缸部35,45中的较厚气缸部的半径。（C）2005，JPO＆NCIPI
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