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    • 2. 发明申请
    • HIGH-FREQUENCY PLASMA SPARK PLUG
    • 高频等离子体火花塞
    • US20130328477A1
    • 2013-12-12
    • US13883316
    • 2011-08-23
    • Kohei KatsurayaTatsunori Yamada
    • Kohei KatsurayaTatsunori Yamada
    • H01T13/34
    • H01T13/34H01T13/20
    • An ignition plug includes an insulator having an axial bore extending in the direction of an axis and an electrode inserted into the axial bore, and generates plasma discharge through supply, to the electrode, of high-frequency power generated by a predetermined high-frequency power supply. The electrode includes a center electrode inserted into the forward side of the axial bore and a terminal electrode inserted into the rear side of the axial bore. In the axial bore, the terminal electrode and the center electrode are fixed to the insulator by means of a glass seal which contains a glass component, and are in direct contact with each other. Thus, ignition performance can be further improved.
    • 火花塞包括具有在轴线方向上延伸的轴向孔和插入到轴向孔中的电极的绝缘体,并且通过向电极向电极产生由预定高频电力产生的高频电力的等离子体放电 供应。 电极包括插入轴向孔的前侧的中心电极和插入轴向孔的后侧的端子电极。 在轴向孔中,端子电极和中心电极通过包含玻璃部件的玻璃密封件固定到绝缘体上,并且彼此直接接触。 因此,可以进一步提高点火性能。
    • 3. 发明申请
    • HIGH-FREQUENCY PLASMA SPARK PLUG
    • 高频等离子体火花塞
    • US20120126681A1
    • 2012-05-24
    • US13198065
    • 2011-08-04
    • Kohei KATSURAYATatsunori YAMADAKatsutoshi NAKAYAMA
    • Kohei KATSURAYATatsunori YAMADAKatsutoshi NAKAYAMA
    • H01T13/04
    • H01T13/50H01T13/05
    • High-frequency plasma spark plug includes an insulator which has an axial hole extending in the axis direction, a center electrode inserted into a distal end side of the axial hole, a terminal electrode inserted into a rear end side of the axial hole, and being electrically connected to the center electrode, and a cylindrical main fitting mounted on an outer periphery of the insulator. With respect to a coaxial cable, the inner conductor is connected to the terminal electrode and the outer conductor is connected to the main fitting. High frequency power generated by a predetermined high-frequency power source is supplied via the coaxial cable thus generating high frequency plasma. The main fitting includes a large diameter portion which bulges radially outward and a connection portion which is brought into contact with the outer conductor.
    • 高频等离子体火花塞包括:具有沿轴向延伸的轴向孔的绝缘体,插入到轴孔的前端侧的中心电极,插入轴孔的后端侧的端子电极, 电连接到中心电极,以及安装在绝缘体的外周上的圆柱形主配件。 对于同轴电缆,内部导体连接到端子电极,外部导体连接到主配件。 由同轴电缆提供由预定的高频电源产生的高频功率,从而产生高频等离子体。 主配件包括径向向外凸出的大直径部分和与外导体接触的连接部分。
    • 5. 发明授权
    • Method of detecting spark plug fouling and ignition system having means for carrying out the same
    • 火花塞污垢检测方法及具有进行火花塞污染的点火系统的方法
    • US06512375B1
    • 2003-01-28
    • US09655764
    • 2000-09-05
    • Tatsunori YamadaYasushi Sakakura
    • Tatsunori YamadaYasushi Sakakura
    • F02P1700
    • F02P17/12
    • A method of detecting spark plug fouling in an internal combustion engine is provided. The method comprises calculating an integration value of discharge current flowing between electrodes of a spark plug during a period of a spark discharge and judging if the calculated discharge current integration value is smaller than an integration value criterion. The integration value criterion is set at such a value that can discriminate between normal discharge and interior jumping (i.e., jumping due to short circuit caused by fouling). When the calculated discharge current integration value is smaller than the integration value criterion, it is judged that the spark plug has been fouled. By this, it becomes possible to detect a spark plug fouling before the electrodes of the spark plug are short-circuited and disabled to generate spark discharge, i.e., before the spark plug is fouled to such an extent as to cause a misfire. An ignition system for detecting spark plug fouling is also provided.
    • 提供一种检测内燃机中火花塞污垢的方法。 该方法包括计算在火花放电期间在火花塞的电极之间流动的放电电流的积分值,并判断所计算的放电电流积分值是否小于积分值准则。 积分值准则被设定为可以区分正常放电和内部跳跃(即,由于结垢引起的短路而跳跃)的值。 当计算出的放电电流积分值小于积分值准则时,判断火花塞已被污染。 由此,可以在火花塞的电极短路并且不能产生火花放电之前,即在火花塞被污染到导致失火的程度之前,检测火花塞污垢。 还提供了一种用于检测火花塞污垢的点火系统。
    • 7. 发明申请
    • IGNITION PLUG AND IGNITION APPARATUS
    • 点火插头和点火装置
    • US20130033188A1
    • 2013-02-07
    • US13565937
    • 2012-08-03
    • Kohei KatsurayaTatsunori YamadaKatsutoshi Nakayama
    • Kohei KatsurayaTatsunori YamadaKatsutoshi Nakayama
    • H01T13/34F02P3/01
    • H01T13/34H01T13/20
    • A technique for lowering power loss involved in supply of high-frequency electric power to an ignition plug. The ignition plug includes a tubular insulator having an axial bore extending therethrough; a center electrode disposed in the axial bore; a metal terminal disposed rearward of the center electrode in the axial bore, electrically connected to the center electrode, and supplied with high-frequency electric power from an external source; a metallic shell disposed to circumferentially surround the insulator; and a ground electrode electrically connected to the metallic shell and adapted to generate plasma in cooperation with the center electrode through supply of high-frequency electric power to the metal terminal. At least a portion of the inner surface of the axial bore is coated with metal coating. The center electrode and the metal terminal are in electrical contact with the metal coating.
    • 一种用于降低向火花塞供应高频电力的功率损耗的技术。 火花塞包括具有延伸穿过其中的轴向孔的管状绝缘体; 设置在所述轴向孔中的中心电极; 金属端子,其设置在所述轴向孔中的所述中心电极的后方,与所述中心电极电连接,并从外部源供给高频电力; 设置成周向包围绝缘体的金属壳; 以及电连接到所述金属壳并且适于通过向所述金属端子提供高频电力而与所述中心电极协作产生等离子体的接地电极。 轴向孔的内表面的至少一部分涂覆有金属涂层。 中心电极和金属端子与金属涂层电接触。