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    • 5. 发明授权
    • Spark plug for an internal combustion engine and process for its
manufacture
    • 用于内燃机的火花塞及其制造工艺
    • US6064144A
    • 2000-05-16
    • US22440
    • 1998-02-12
    • Harald KnollErwin SchneckWerner NiessnerDirk Von HachtHeinz Ambacher
    • Harald KnollErwin SchneckWerner NiessnerDirk Von HachtHeinz Ambacher
    • H01T13/39H01T13/46H01T13/20
    • H01T13/39H01T13/467
    • A spark plug, especially one for a gas-fueled internal combustion engine has an electrically conducting spark plug body (1), a central electrode (3) which is located in the spark plug body (1) and which is electrically insulated from and projects away from the spark plug body (1), and a ground electrode (4) which is electrically connected to the spark plug body (1) and is made in the form of an annular electrode. The annular electrode (4) surrounds the front part of central electrode (3) such that an annular ignition gap (ZS) is formed between them. Surfaces of the central electrode (3) and the annular electrode (4) bordering the ignition gap (ZS) are provided with precious metal armorings in the form of sleeves (5, 6,), especially of platinum or a platinum alloy. This yields a spark plug with an extremely long service life. A method for producing this spark plug involves the steps of forming a concentric centering groove in the spark plug body for the ground electrode, forming welding cams on the ground electrode, and inserting the ground electrode with the welding cams into the centering groove of the spark plug body and welding the welding cams to the spark plug body.
    • 一种火花塞,特别是一种用于燃气内燃机的火花塞,具有导电火花塞体(1),位于火花塞体(1)内的中心电极(3) 远离火花塞体(1)的接地电极(4),与火花塞体(1)电连接并形成环形电极的接地电极(4)。 环形电极(4)围绕中心电极(3)的前部,使得它们之间形成环形点火间隙(ZS)。 与点火间隙(ZS)接壤的中心电极(3)和环形电极(4)的表面设有以套管(5,6),尤其是铂或铂合金形式的贵金属护甲。 这产生了具有极长使用寿命的火花塞。 一种用于制造该火花塞的方法包括以下步骤:在用于接地电极的火花塞体中形成同心定心槽,在接地电极上形成焊接凸轮,并将具有焊接凸轮的接地电极插入火花的定心槽 将焊接凸轮焊接到火花塞体上。