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：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：US07105990B2

公开(公告)日：2006-09-12

申请号：US10408089

申请日：2003-04-08

申请人： Masamichi Shibata ,  Tsunenobu Hori

发明人： Masamichi Shibata ,  Tsunenobu Hori

IPC分类号： H01T13/20

CPC分类号： H01T13/39

摘要： Carbon fouling adhered on an insulator tip of a spark plug of the present invention is burnt down by a leak current during an inductive discharge period, due to a promoted ionization before beginning a capacitive discharge, in such an arrangement of a central electrode that a border portion of a body and narrowed portion is positioned in an insulator. The carbon burning-down effect is further improved by a narrow projection provided with an earth electrode, due to increased inductive energy and extended inductive discharge time period. This is because an electric field in a discharge gap is raised, thereby decreasing a discharge voltage and suppressing an energy emitted from a coil during the capacitive discharge.

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：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：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：US07605526B2

公开(公告)日：2009-10-20

申请号：US11654651

申请日：2007-01-18

申请人： Teiji Ishinada ,  Tsunenobu Hori

发明人： Teiji Ishinada ,  Tsunenobu Hori

IPC分类号： H01T13/20

CPC分类号： H01T13/20 ,  H01T13/32 ,  H01T13/39

摘要： A spark plug for an internal combustion engine is disclosed having a metal shell having an outer periphery formed with a mounting thread, a porcelain insulator fixedly secured to the metal shell on a central axis thereof, a center electrode retained within the porcelain insulator along a central axis thereof with a distal end located outside the porcelain insulator, and a ground electrode joined to the metal shell and having an end associated with the distal end of the center electrode to define therebetween a spark discharge gap. The ground electrode includes a facing surface intersecting the central axis of the center electrode and having a width equal to or less than 1.6 mm.

摘要翻译： 公开了一种用于内燃机的火花塞，其具有金属外壳，其外周形成有安装螺纹，瓷绝缘体在其中心轴线上固定地固定到金属壳体上，中心电极沿着中心线保持在瓷绝缘体内 其远端位于瓷绝缘体外部，接地电极接合到金属外壳并具有与中心电极的远端相关联的端部，以在其间限定火花放电间隙。 接地电极包括与中心电极的中心轴线相交并具有等于或小于1.6mm的宽度的面对表面。

公开(公告)号：US20090165440A1

公开(公告)日：2009-07-02

申请号：US12224674

申请日：2007-09-10

申请人： Hiroshi Sawada ,  Tsunenobu Hori

发明人： Hiroshi Sawada ,  Tsunenobu Hori

IPC分类号： F01N11/00 ,  G01M15/10

CPC分类号： B01D53/9495 ,  B01D53/9409 ,  F01N3/0842 ,  F01N11/007 ,  F01N2550/03 ,  F01N2570/14 ,  Y02A50/2344 ,  Y02T10/47

摘要： A storage reduction NOx catalyst is disposed in an exhaust passage for an internal combustion engine. A NOx sensor is disposed upstream of the NOx catalyst. An inflow NOx amount, which is the amount of NOx that has flown into the NOx catalyst, is calculated by accumulating the output of the NOx sensor. A total storage amount, which is the sum of the amounts of oxygen and NOx stored in the NOx catalyst, is calculated based on an output generated by an exhaust gas sensor disposed downstream of the NOx catalyst when rich spike is being executed. The deterioration of the NOx catalyst is determined based on the inflow NOx amount and the total storage amount.

摘要翻译： 在内燃机的排气通道中设置有储存还原NOx催化剂。 NOx传感器设置在NOx催化剂的上游。 通过累积NOx传感器的输出来计算作为流入NOx催化剂的NOx的量的流入NOx量。 基于当执行富穗时，由设置在NOx催化剂下游的排气传感器产生的输出计算总存储量，其是存储在NOx催化剂中的氧气和NOx的总和的总量。 NOx催化剂的劣化是根据流入NOx量和总储存量来确定的。