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1. 发明授权

US08395307B2 Spark plug for preventing accumulation of carbon on an insulator 有权
标题翻译：用于防止碳绝缘体积聚的火花塞
公开(公告)号：US08395307B2
公开(公告)日：2013-03-12
申请号：US13142893
申请日：2009-12-07
申请人： Akira Suzuki , Tomoaki Kato , Mamoru Musasa , Toshitaka Honda
发明人： Akira Suzuki , Tomoaki Kato , Mamoru Musasa , Toshitaka Honda
IPC分类号： H01T13/20
CPC分类号： H01T13/14
摘要： A spark plug which provides reliable prevention of adhesion and accumulation of carbon on an insulator, includes a center electrode extending in the direction of an axis CL1, a ceramic insulator having an axial hole which extends in the direction of the axis CL1 and in which the center electrode is provided, a cylindrical metallic shell provided externally of the outer circumference of the insulator and having a support portion formed on the inner circumferential surface thereof, and a ground electrode extending from a front end portion of the metallic shell. The insulator has a stepped portion supported by the support portion of the metallic shell, and a leg portion formed forward of the stepped portion. A space SP formed between the leg portion of the insulator and the inner circumferential surface of the metallic shell has a volume of 100 mm3 to 300 mm3 inclusive.
摘要翻译：提供可靠地防止绝缘体上的碳的粘附和积聚的火花塞包括沿轴线CL1的方向延伸的中心电极，具有沿轴线CL1的方向延伸的轴向孔的陶瓷绝缘体，其中，中心电极，设置在绝缘体的外周外侧的具有形成在其内周面上的支撑部分的圆筒形金属壳体和从金属壳体的前端部延伸的接地电极。绝缘体具有由金属壳的支撑部分支撑的阶梯部分和在阶梯部分的前方形成的脚部。在绝缘体的腿部和金属壳的内周面之间形成的空间SP的体积为100mm 3〜300mm 3（以下）。

2. 发明申请

US20110266940A1 SPARK PLUG 有权
标题翻译： SPARK插头
公开(公告)号：US20110266940A1
公开(公告)日：2011-11-03
申请号：US13142893
申请日：2009-12-07
申请人： Akira Suzuki , Tomoaki Kate , Mamoru Musasa , Toshitaka Honda
发明人： Akira Suzuki , Tomoaki Kate , Mamoru Musasa , Toshitaka Honda
IPC分类号： H01T13/20
CPC分类号： H01T13/14
摘要： A spark plug which provides reliable prevention of adhesion and accumulation of carbon on an insulator, includes a center electrode extending in the direction of an axis CL1, a ceramic insulator having an axial hole which extends in the direction of the axis CL1 and in which the center electrode is provided, a cylindrical metallic shell provided externally of the outer circumference of the insulator and having a support portion formed on the inner circumferential surface thereof, and a ground electrode extending from a front end portion of the metallic shell. The insulator has a stepped portion supported by the support portion of the metallic shell, and a leg portion formed forward of the stepped portion. A space SP formed between the leg portion of the insulator and the inner circumferential surface of the metallic shell has a volume of 100 mm3 to 300 mm3 inclusive.
摘要翻译：提供可靠地防止绝缘体上的碳的粘附和积聚的火花塞包括沿轴线CL1的方向延伸的中心电极，具有沿轴线CL1的方向延伸的轴向孔的陶瓷绝缘体，其中，中心电极，设置在绝缘体的外周外侧的具有形成在其内周面上的支撑部分的圆筒形金属壳体和从金属壳体的前端部延伸的接地电极。绝缘体具有由金属壳的支撑部分支撑的阶梯部分和在阶梯部分的前方形成的脚部。在绝缘体的腿部和金属壳的内周面之间形成的空间SP的体积为100mm 3〜300mm 3（以下）。

3. 发明授权

US08539921B2 Spark plug 有权
标题翻译：火花塞
公开(公告)号：US08539921B2
公开(公告)日：2013-09-24
申请号：US12921310
申请日：2009-03-17
申请人： Makoto Kuribayashi , Hirokazu Kurono , Toshitaka Honda , Tomoaki Kato
发明人： Makoto Kuribayashi , Hirokazu Kurono , Toshitaka Honda , Tomoaki Kato
IPC分类号： H01T13/20
CPC分类号： H01T13/16 , H01T13/20 , H01T13/38
摘要： An isolation portion (P) of an insulator (10) of a spark plug (100) electrically insulatively isolates a front end portion (22) of a center electrode (20) and a holding portion (56) of a metallic shell (50) from each other and has an intermediate portion (P2) which extends while its outside diameter varies, thereby ensuring an insulation distance between the two portions. The ratio (S/V) of the surface area (S) of the outer surface (14) of the isolation portion (P) to the volume (V) of the isolation portion (P) satisfies the relation 1.26 mm−1≦S/V, whereby the insulation distance between the front end portion (22) and the holding portion (56) is sufficiently ensured while existing dimensional conditions are held unchanged. Through satisfaction of the relation S/V≦1.40 mm−1, an increase in temperature of the center electrode (20) that accompanies an increase in the amount of heat received from a combustion chamber owing to an increase in the surface area (S) of the outer surface (14) is restrained, thereby maintaining a required heat value.
摘要翻译：火花塞（100）的绝缘体（10）的隔离部分（P）电绝缘地隔离中心电极（20）的前端部分（22）和金属壳体（50）的保持部分（56）并且具有在其外径变化的同时延伸的中间部分（P2），从而确保两部分之间的绝缘距离。隔离部分（P）的外表面（14）与隔离部分（P）的体积（V）的表面积（S）的比（S / V）满足关系1.26mm-1 @ S / V，从而充分确保前端部分（22）和保持部分（56）之间的绝缘距离，同时保持原有的尺寸条件不变。通过满足S / V @ 1.40mm-1的关系，由于表面积（S）的增加伴随着从燃烧室接收的热量增加的中心电极（20）的温度升高，的外表面（14）被抑制，从而保持所需的热值。

4. 发明申请

US20110000453A1 SPARK PLUG 有权
标题翻译： SPARK插头
公开(公告)号：US20110000453A1
公开(公告)日：2011-01-06
申请号：US12921310
申请日：2009-03-17
申请人： Makoto Kuribayashi , Hirokazu Kurono , Toshitaka Honda , Tomoaki Kato
发明人： Makoto Kuribayashi , Hirokazu Kurono , Toshitaka Honda , Tomoaki Kato
IPC分类号： H01T13/08
CPC分类号： H01T13/16 , H01T13/20 , H01T13/38
摘要： An isolation portion (P) of an insulator (10) of a spark plug (100) electrically insulatively isolates a front end portion (22) of a center electrode (20) and a holding portion (56) of a metallic shell (50) from each other and has an intermediate portion (P2) which extends while its outside diameter varies, thereby ensuring an insulation distance between the two portions. The ratio (S/V) of the surface area (S) of the outer surface (14) of the isolation portion (P) to the volume (V) of the isolation portion (P) satisfies the relation 1.26 mm−1≦S/V, whereby the insulation distance between the front end portion (22) and the holding portion (56) is sufficiently ensured while existing dimensional conditions are held unchanged. Through satisfaction of the relation S/V≦1.40 mm−1, an increase in temperature of the center electrode (20) that accompanies an increase in the amount of heat received from a combustion chamber owing to an increase in the surface area (S) of the outer surface (14) is restrained, thereby maintaining a required heat value.
摘要翻译：火花塞（100）的绝缘体（10）的隔离部分（P）电绝缘地隔离中心电极（20）的前端部分（22）和金属壳体（50）的保持部分（56）并且具有在其外径变化的同时延伸的中间部分（P2），从而确保两部分之间的绝缘距离。隔离部分（P）的外表面（14）的表面积（S）与隔离部分（P）的体积（V）的比（S / V）满足关系1.26mm-1＆nlE; S / V，从而充分确保前端部分（22）和保持部分（56）之间的绝缘距离，同时保持原有的尺寸条件不变。通过满足S / V＆nlE; 1.40mm-1的关系，伴随着由于表面积（S）的增加而从燃烧室接收的热量的增加，中心电极（20）的温度升高的外表面（14）被抑制，从而保持所需的热值。

5. 发明授权

US07808250B2 Test method and apparatus for spark plug insulator 有权
标题翻译：火花塞绝缘子的测试方法和装置
公开(公告)号：US07808250B2
公开(公告)日：2010-10-05
申请号：US12130120
申请日：2008-05-30
申请人： Toshitaka Honda , Hirokazu Kurono , Tomoaki Kato
发明人： Toshitaka Honda , Hirokazu Kurono , Tomoaki Kato
IPC分类号： G01N27/00
CPC分类号： H01T13/60
摘要： There is provided a test method for detecting the presence or absence of a defect in a spark plug insulator, including a reference voltage determination process, a test area determination process, a test voltage determination process and a current detection process. In the reference voltage determination process, a reference voltage VF is determined. In the test area and voltage determined processes, test area and voltage are determined so as not to incur a flashover on the basis of a reference insulator of the same material, shape and size as the spark plug insulator when the reference insulator is placed in position between first and second test electrodes. In the current detection step, the test voltage is applied between the first and second test electrodes to detect an electric current between the first and second test electrodes.
摘要翻译：提供了一种用于检测火花塞绝缘子中缺陷的存在或不存在的测试方法，包括参考电压确定过程，测试区域确定过程，测试电压确定过程和电流检测过程。在参考电压确定过程中，确定参考电压VF。在测试区域和电压确定过程中，确定测试区域和电压，以便在参考绝缘子放置就位时，基于与火花塞绝缘体相同的材料，形状和尺寸的参考绝缘体不引起闪络在第一和第二测试电极之间。在电流检测步骤中，在第一和第二测试电极之间施加测试电压，以检测第一和第二测试电极之间的电流。

6. 发明申请

US20080238280A1 SPARK PLUG OF INTERNAL COMBUSTION ENGINE 有权
标题翻译：火花塞内燃机
公开(公告)号：US20080238280A1
公开(公告)日：2008-10-02
申请号：US12056135
申请日：2008-03-26
申请人： Mai MORIBE , Akira Suzuki , Toshitaka Honda
发明人： Mai MORIBE , Akira Suzuki , Toshitaka Honda
IPC分类号： H01T13/38
CPC分类号： H01T13/38
摘要： There is provided a spark plug of an internal combustion engine, including a cylindrical metal shell, an insulator retained in the metal shell and having a through hole in an axial direction of the spark plug and a center electrode fitted in the through hole of the insulator. The insulator includes a rear body portion, a middle body portion and a large-diameter portion located between and protruded radially outwardly from the rear and middle body portions to define a rear shoulder section connected to the rear body portion and a front shoulder section connected to the middle body portion. For strength improvements, the insulator has a first glaze layer extending over the rear body portion and the rear shoulder section of the large-diameter portion and a second glaze layer extending over at least part of the middle body portion from some point on the front shoulder section of the large-diameter portion.
摘要翻译：提供了一种内燃机的火花塞，其包括圆筒形金属壳，保持在金属壳中的绝缘体，并且在火花塞的轴向方向上具有通孔，并且安装在绝缘体的通孔中的中心电极。绝缘体包括后身部分，中间本体部分和大直径部分，其位于中后本体部分之间并径向向外突出，以限定连接到后主体部分的后肩部分和连接到后身部分的前肩部分中间部分。为了提高强度，绝缘体具有在大直径部分的后体部分和后肩部分之上延伸的第一釉层，以及从前肩部上的一点延伸到中间本体部分的至少一部分的第二釉层大直径部分的截面。

7. 发明授权

US08564183B2 Spark plug and method for manufacturing spark plug 有权
标题翻译：火花塞和火花塞的制造方法
公开(公告)号：US08564183B2
公开(公告)日：2013-10-22
申请号：US13498038
申请日：2010-09-13
申请人： Akira Suzuki , Katsuya Takaoka , Toshitaka Honda , Hirokazu Kurono
发明人： Akira Suzuki , Katsuya Takaoka , Toshitaka Honda , Hirokazu Kurono
IPC分类号： H01T13/00
CPC分类号： H01T13/39 , C04B35/117 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3409 , C04B2235/3418 , C04B2235/3427 , C04B2235/5436 , C04B2235/77 , C04B2235/85 , H01T21/02
摘要： A spark plug having a center electrode, an insulator and a metal shell and satisfying conditions (1) to (5) as defined herein. Also disclosed is a method of manufacturing a spark plug including the step of producing an insulator by preparing a raw material powder in such a manner that the particle size distribution ratio (90% volume diameter/10% volume diameter) between particles of 10% volume diameter and particles of 90% volume diameter in the raw material powder is 3.6 to 5.2, and then, press-forming and sintering the prepared raw material powder.
摘要翻译：一种火花塞，其具有中心电极，绝缘体和金属壳，并且满足如本文所定义的条件（1）至（5）。还公开了一种制造火花塞的方法，该方法包括如下步骤：通过制备原料粉末来制备绝缘体，使得颗粒间的体积分数比例（体积直径为90％，体积直径为10％）为10体积％原料粉末的直径和体积直径为90体积的颗粒为3.6〜5.2，然后进行压制成型烧结所制备的原料粉末。

8. 发明授权

US07906893B2 Spark plug of internal combustion engine having glaze layers on the spark plug 有权
标题翻译：在火花塞上具有釉层的内燃机的火花塞
公开(公告)号：US07906893B2
公开(公告)日：2011-03-15
申请号：US12056135
申请日：2008-03-26
申请人： Mai Moribe , Akira Suzuki , Toshitaka Honda
发明人： Mai Moribe , Akira Suzuki , Toshitaka Honda
IPC分类号： H01T13/02
CPC分类号： H01T13/38
摘要： There is provided a spark plug of an internal combustion engine, including a cylindrical metal shell, an insulator retained in the metal shell and having a through hole in an axial direction of the spark plug and a center electrode fitted in the through hole of the insulator. The insulator includes a rear body portion, a middle body portion and a large-diameter portion located between and protruded radially outwardly from the rear and middle body portions to define a rear shoulder section connected to the rear body portion and a front shoulder section connected to the middle body portion. For strength improvements, the insulator has a first glaze layer extending over the rear body portion and the rear shoulder section of the large-diameter portion and a second glaze layer extending over at least part of the middle body portion from some point on the front shoulder section of the large-diameter portion.
摘要翻译：提供了一种内燃机的火花塞，其包括圆筒形金属壳，保持在金属壳中的绝缘体，并且在火花塞的轴向方向上具有通孔，并且安装在绝缘体的通孔中的中心电极。绝缘体包括后身部分，中间本体部分和大直径部分，其位于中后本体部分之间并径向向外突出，以限定连接到后主体部分的后肩部分和连接到后身部分的前肩部分中间部分。为了提高强度，绝缘体具有在大直径部分的后体部分和后肩部分之上延伸的第一釉层，以及从前肩部上的一点延伸到中间本体部分的至少一部分的第二釉层大直径部分的截面。

9. 发明授权

US08770777B2 Spark plug 有权
标题翻译：火花塞
公开(公告)号：US08770777B2
公开(公告)日：2014-07-08
申请号：US13816567
申请日：2011-09-16
申请人： Haruki Yoshida , Toshitaka Honda , Akira Suzuki
发明人： Haruki Yoshida , Toshitaka Honda , Akira Suzuki
IPC分类号： H01T13/02 , H01T13/05
CPC分类号： H01T13/02 , H01T13/05 , H01T13/20 , H01T13/34 , H01T13/41 , H01T21/02
摘要： A spark plug having excellent load life performance even when the spark plug receives an impact or vibration. The spark plug includes an accommodated portion of a metallic terminal, which is accommodated in an axial hole of an insulator, having a plurality of bent portions formed as a result of proper bending of the accommodated portion. The bent portions are in close vicinity to an inner circumferential surface of the insulator at three or more locations, and are present without localizing in the radial direction of the axial hole.
摘要翻译：火花塞即使在火花塞受到冲击或振动时也具有优异的负载寿命性能。火花塞包括容纳在绝缘体的轴向孔中的金属端子的容纳部分，其具有由于容纳部分的适当弯曲而形成的多个弯曲部分。弯曲部分在三个或更多个位置处紧邻绝缘体的内周表面，并且在轴向孔的径向方向上不存在定位。

10. 发明申请

US20120319556A1 SPARK PLUG AND METHOD FOR MANUFACTURING SPARK PLUG 有权
公开(公告)号：US20120319556A1
公开(公告)日：2012-12-20
申请号：US13498038
申请日：2010-09-13
申请人： Akira Suzuki , Katsuya Takaoka , Toshitaka Honda , Hirokazu Kurono
发明人： Akira Suzuki , Katsuya Takaoka , Toshitaka Honda , Hirokazu Kurono
IPC分类号： H01T13/38 , H01T21/02
CPC分类号： H01T13/39 , C04B35/117 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3409 , C04B2235/3418 , C04B2235/3427 , C04B2235/5436 , C04B2235/77 , C04B2235/85 , H01T21/02
摘要： The present invention relates to a spark plug having good combustible-gas ignitability even when the spark plug is downsized and to a method for high-yield manufacturing of a spark plug with good combustible-gas ignitability. There is provided according to one aspect of the present invention a spark plug 1 having a center electrode 2, an insulator 3 and a metal shell 4 and satisfying the following conditions (1) to (5). There is provided according to another aspect of the present invention a manufacturing method of a spark plug including the step of producing an insulator by preparing a raw material powder in such a manner that the particle size distribution ratio (90% volume diameter/10% volume diameter) between particles of 10% volume diameter and particles of 90% volume diameter in the raw material powder is 3.6 to 5.2, and then, press-forming and sintering the prepared raw material powder. Condition (1): The insulator has a wall thickness T of 0.3 to 1.1 mm at an imaginary plane including a front end face of the metal shell. Condition (2): A region of the insulator extending from a front end of the insulator to at least 2 mm rear from the imaginary plane is formed of an alumina-based sintered body containing a Si component, a rare earth element component and at least two kinds of Group 2 element components and being substantially free from a B component. Condition (3): The mass ratio RRE of a mass of the rare earth element component to a total mass of the Si component, the Group 2 element components and the rare earth element component in the alumina-based sintered body is 0.15 to 0.45. Condition (4): The mass ratio R2 of a total mass of the components of the Group 2 elements to a mass of the Si component in the alumina-based sintered body is 0.25 or greater. Condition (5): The alumina-based sintered body includes, in a grain boundary phase thereof, an aluminate crystal containing the rare earth element component.

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