公开(公告)号：US20050029915A1

公开(公告)日：2005-02-10

申请号：US10910585

申请日：2004-08-04

申请人： Hiroshi Yorita ,  Shinichi Okabe ,  Hitoshi Morita ,  Tsunenobu Hori

发明人： Hiroshi Yorita ,  Shinichi Okabe ,  Hitoshi Morita ,  Tsunenobu Hori

IPC分类号： C22C5/04 ,  H01T13/20 ,  H01T13/39 ,  H01T13/46

CPC分类号： H01T13/39

摘要： A small-sized spark plug is provided which ensures the stability in the location of production of sparks between center and ground electrodes. The center and ground electrodes have joined thereon cylindrical members such as noble metal chips which are opposed to each other through a spark gap. The cylindrical members are so oriented to have longitudinal center lines extend parallel in misalignment with each other. This orientation results in shorter and longer intervals between end surfaces of the cylindrical members. The sparks are concentrated between portions of edges of cylindrical members located apart the shorter interval, thereby resulting in the stability in the location of production of the sparks.

摘要翻译： 提供了一种小型火花塞，确保了在中心和接地电极之间产生火花的位置的稳定性。 中心接地电极通过火花隙彼此相对的圆柱形构件，例如贵金属芯片。 圆柱形构件被定向成具有彼此不对准的纵向中心线平行延伸。 这种方向导致圆柱形构件的端面之间的更短和更长的间隔。 火花集中在位于较短间隔之间的圆筒形部件的边缘部分之间，从而导致火花产生位置的稳定性。

公开(公告)号：US07449822B2

公开(公告)日：2008-11-11

申请号：US10910585

申请日：2004-08-04

申请人： Hiroshi Yorita ,  Shinichi Okabe ,  Hitoshi Morita ,  Tsunenobu Hori

发明人： Hiroshi Yorita ,  Shinichi Okabe ,  Hitoshi Morita ,  Tsunenobu Hori

IPC分类号： H01T13/20 ,  H01T13/39

CPC分类号： H01T13/39

摘要： A small-sized spark plug is provided which ensures the stability in the location of production of sparks between center and ground electrodes. The center and ground electrodes have joined thereon cylindrical members such as noble metal chips which are opposed to each other through a spark gap. The cylindrical members are so oriented to have longitudinal center lines extend parallel in misalignment with each other. This orientation results in shorter and longer intervals between end surfaces of the cylindrical members. The sparks are concentrated between portions of edges of cylindrical members located apart the shorter interval, thereby resulting in the stability in the location of production of the sparks.

摘要翻译： 提供了一种小型火花塞，确保了在中心和接地电极之间产生火花的位置的稳定性。 中心接地电极通过火花隙彼此相对的圆柱形构件，例如贵金属芯片。 圆柱形构件被定向成具有彼此不对准的纵向中心线平行延伸。 这种方向导致圆柱形构件的端面之间的更短和更长的间隔。 火花集中在位于较短间隔之间的圆筒形部件的边缘部分之间，从而导致火花产生位置的稳定性。

公开(公告)号：US07109646B2

公开(公告)日：2006-09-19

申请号：US10730885

申请日：2003-12-10

申请人： Hitoshi Morita ,  Shinichi Okabe ,  Masamichi Shibata ,  Tsunenobu Hori

发明人： Hitoshi Morita ,  Shinichi Okabe ,  Masamichi Shibata ,  Tsunenobu Hori

IPC分类号： H01T13/20

CPC分类号： H01T13/20 ,  H01T13/39

摘要： 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.

摘要翻译： 火花塞由具有圆柱形结构的主金属配件，设置在圆筒形主金属配件内部的绝缘体组成，中心电极以这样的方式装配在绝缘体中，使得中心电极的前端部分在 绝缘体和安装在主金属配件上的接地电极，并具有通过其间的放电间隙与中心电极的前端部相对的一端部。 中心电极的前端部分包括具有锥形角小于80°的锥形表面的圆锥形部分和形成在锥形部分的顶端部分上的直径在一定范围内的圆柱形部分 0.4mm至0.8mm。

公开(公告)号：US06653767B2

公开(公告)日：2003-11-25

申请号：US09960514

申请日：2001-09-24

申请人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

发明人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

IPC分类号： H01T1320

CPC分类号： H01T13/39 ,  H01T13/20

摘要： At least one of a center electrode tip and a ground electrode tip is made of an iridium alloy. A discharge gap, formed between the center electrode tip and the ground electrode tip, is less than 1.1 mm. And, cross sections of the center electrode tip and the ground electrode tip are equal to or smaller than 0.95 mm2 in a spherical region where a distance from a midpoint of the discharge gap is within 0.6 mm.

摘要翻译： 中心电极尖端和接地电极尖端中的至少一个由铱合金制成。 形成在中心电极尖端和接地电极尖端之间的放电间隙小于1.1mm。 并且，在距离放电间隙的中点的距离在0.6mm以内的球面区域中，中心电极端部和接地电极端部的截面为0.95mm 2以下。

公开(公告)号：US06844662B2

公开(公告)日：2005-01-18

申请号：US10661568

申请日：2003-09-15

申请人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

发明人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

IPC分类号： F02P13/00 ,  H01T13/20 ,  H01T13/32 ,  H01T13/39

CPC分类号： H01T13/39 ,  H01T13/20

摘要： At least one of a center electrode tip and a ground electrode tip is made of an iridium alloy. A discharge gap, formed between the center electrode tip and the ground electrode tip, is less than 1.1 mm. And, cross sections of the center electrode tip and the ground electrode tip are equal to or smaller than 0.95 mm2 in a spherical region where a distance from a midpoint of the discharge gap is within 0.6 mm.

摘要翻译： 中心电极尖端和接地电极尖端中的至少一个由铱合金制成。 形成在中心电极尖端和接地电极尖端之间的放电间隙小于1.1mm。 并且，在距离放电间隙的中点的距离在0.6mm以内的球面区域中，中心电极端部和接地电极端部的截面为0.95mm 2以下。

公开(公告)号：US20060028108A1

公开(公告)日：2006-02-09

申请号：US11197437

申请日：2005-08-05

申请人： Shinichi Okabe ,  Tsunenobu Hori

发明人： Shinichi Okabe ,  Tsunenobu Hori

IPC分类号： H01T13/20

CPC分类号： H01T13/20 ,  H01T13/38

摘要： A spark plug according to the invention includes a metal shell, a hollow insulator, a center electrode, and a ground electrode. The insulator has a first end protruding into a combustion chamber of an engine and a second end opposite to the first end in the lengthwise direction of the insulator. The insulator increases in outer diameter from the edge of the inner surface thereof at the first end to a reference plane that is defined to extend perpendicular to the lengthwise direction of the insulator and away 0.1 mm from the edge of the inner surface of the insulator toward the second end of the same in the lengthwise direction. Further, a first volume V1, which is the volume of a portion of the insulator between the edge of the inner surface of the insulator and the reference plane, is in the range of 0.15 to 0.38 mm3.

摘要翻译： 根据本发明的火花塞包括金属壳，中空绝缘体，中心电极和接地电极。 绝缘体具有突出到发动机的燃烧室中的第一端和与绝缘体的长度方向上的第一端相反的第二端。 绝缘体的外径从第一端的内表面的边缘增加到参考平面，该参考平面被限定为垂直于绝缘体的长度方向延伸并离开绝缘体的内表面的边缘0.1mm离开 第二端在长度方向相同。 此外，作为绝缘子的内表面的边缘与参考平面的绝缘体的一部分的体积的第一体积V 1在0.15至0.38mm 3范围内。 。

公开(公告)号：US20060028107A1

公开(公告)日：2006-02-09

申请号：US11197747

申请日：2005-08-05

申请人： Tsunenobu Hori ,  Shinichi Okabe

发明人： Tsunenobu Hori ,  Shinichi Okabe

IPC分类号： H01T13/20

CPC分类号： H01T13/32 ,  H01T13/467

摘要： A spark plug according to the present invention includes a metal shell, an insulator, a cylindrical center electrode, a first ground electrode, and a second ground electrode. The first ground electrode is aligned with the center electrode in the axial direction of the center electrode to form a first spark gap, across which normal sparks are discharged when the insulator is not fouled with carbon. The second ground electrode is aligned with the center electrode in the radial direction of the center electrode to form a second spark gap, across which side sparks are discharged when the insulator is fouled with carbon. The spark plug has an improved structure where dimensional parameters A, T, B, C, L, D, and E are specified to be in suitable ranges that are determined through experimental investigation. The improved structure ensures a high ignition capability and a long service life of the spark plug.

摘要翻译： 根据本发明的火花塞包括金属壳，绝缘体，圆柱形中心电极，第一接地电极和第二接地电极。 第一接地电极在中心电极的轴向上与中心电极对准，以形成第一火花隙，当绝缘体不被碳污染时，正常火花放电。 第二接地电极在中心电极的径向上与中心电极对准以形成第二火花隙，当绝缘体被碳污染时，第二接地电极在该侧面火花放电。 火花塞具有改进的结构，其中尺寸参数A，T，B，C，L，D和E被规定在通过实验调查确定的合适范围内。 改进的结构确保了火花塞的高点火能力和较长的使用寿命。

公开(公告)号：US07170219B2

公开(公告)日：2007-01-30

申请号：US11197747

申请日：2005-08-05

申请人： Tsunenobu Hori ,  Shinichi Okabe

发明人： Tsunenobu Hori ,  Shinichi Okabe

IPC分类号： H01J13/20

CPC分类号： H01T13/32 ,  H01T13/467

摘要： A spark plug according to the present invention includes a metal shell, an insulator, a cylindrical center electrode, a first ground electrode, and a second ground electrode. The first ground electrode is aligned with the center electrode in the axial direction of the center electrode to form a first spark gap, across which normal sparks are discharged when the insulator is not fouled with carbon. The second ground electrode is aligned with the center electrode in the radial direction of the center electrode to form a second spark gap, across which side sparks are discharged when the insulator is fouled with carbon. The spark plug has an improved structure where dimensional parameters A, T, B, C, L, D, and E are specified to be in suitable ranges that are determined through experimental investigation. The improved structure ensures a high ignition capability and a long service life of the spark plug.

摘要翻译： 根据本发明的火花塞包括金属壳，绝缘体，圆柱形中心电极，第一接地电极和第二接地电极。 第一接地电极在中心电极的轴向上与中心电极对准，以形成第一火花隙，当绝缘体不被碳污染时，正常火花放电。 第二接地电极在中心电极的径向上与中心电极对准以形成第二火花隙，当绝缘体被碳污染时，第二接地电极在该侧面火花放电。 火花塞具有改进的结构，其中尺寸参数A，T，B，C，L，D和E被规定在通过实验调查确定的合适范围内。 改进的结构确保了火花塞的高点火能力和较长的使用寿命。

公开(公告)号：US07408294B2

公开(公告)日：2008-08-05

申请号：US11197437

申请日：2005-08-05

申请人： Shinichi Okabe ,  Tsunenobu Hori

发明人： Shinichi Okabe ,  Tsunenobu Hori

IPC分类号： H01J13/20

CPC分类号： H01T13/20 ,  H01T13/38

摘要： A spark plug according to the invention includes a metal shell, a hollow insulator, a center electrode, and a ground electrode. The insulator has a first end protruding into a combustion chamber of an engine and a second end opposite to the first end in the lengthwise direction of the insulator. The insulator increases in outer diameter from the edge of the inner surface thereof at the first end to a reference plane that is defined to extend perpendicular to the lengthwise direction of the insulator and away 0.1 mm from the edge of the inner surface of the insulator toward the second end of the same in the lengthwise direction. Further, a first volume V1, which is the volume of a portion of the insulator between the edge of the inner surface of the insulator and the reference plane, is in the range of 0.15 to 0.38 mm3.

摘要翻译： 根据本发明的火花塞包括金属壳，中空绝缘体，中心电极和接地电极。 绝缘体具有突出到发动机的燃烧室中的第一端和与绝缘体的长度方向上的第一端相反的第二端。 绝缘体的外径从第一端的内表面的边缘增加到参考平面，该参考平面被限定为垂直于绝缘体的长度方向延伸并离开绝缘体的内表面的边缘0.1mm离开 长度方向的第二端相同。 此外，作为绝缘子的内表面的边缘与参考平面的绝缘体的一部分的体积的第一体积V 1在0.15至0.38mm 3范围内。 。

公开(公告)号：US06397827B1

公开(公告)日：2002-06-04

申请号：US09630009

申请日：2000-07-31

申请人： Takehiko Kato ,  Tohru Yoshinaga ,  Hiroshi Yorita ,  Shinichi Okabe ,  Tatsushi Nakashima ,  Tetsuya Miwa

发明人： Takehiko Kato ,  Tohru Yoshinaga ,  Hiroshi Yorita ,  Shinichi Okabe ,  Tatsushi Nakashima ,  Tetsuya Miwa

IPC分类号： F02P1510

CPC分类号： F02P15/08 ,  F02D41/3023 ,  F02D2041/389 ,  F02P9/007

摘要： An ignition device sets a total discharge period, each discharge period and each intermittent period of a multiple discharge are set by a control map in addition to the setting of a throttle opening, fuel injection timing, fuel injection period and ignition timing for the range of non-stratified charge combustion, when a direct injection-type engine operates in the range of stratified charge combustion. Ignition signals including a plurality of rises and falls are outputted in time with a specific ignition timing after fuel injection. Thus a plurality of sparks are generated from the spark plug, ensuring reliable ignition in response to changes in the concentration of sprayed fuel within the operation range for stratified charge combustion.

摘要翻译： 点火装置设定总放电周期，除了设定节气门开度，燃料喷射正时，燃料喷射期间和点火正时之外，还通过控制图来设定每个放电周期和多次放电的每个间歇期间 当直喷式发动机在分层充气燃烧的范围内运行时，非分层充气燃烧。 在燃料喷射之后，具有特定点火正时的时间，输出包括多个上升和下降的点火信号。 因此，从火花塞产生多个火花，确保在分层充气燃烧的操作范围内响应于喷射燃料的浓度变化而可靠地着火。