公开(公告)号：US5103136A

公开(公告)日：1992-04-07

申请号：US700531

申请日：1991-05-14

申请人： Takahiro Suzuki ,  Yuuki Izuoka

发明人： Takahiro Suzuki ,  Yuuki Izuoka

IPC分类号： H01T13/52

CPC分类号： H01T13/52

摘要： An igniter plug has a metallic shell, a front end of which has a tubular ground electrode. A hollow semiconductor tip is in the form of inversed frusto-cone shape, and placed within the tubular ground electrode. A tubular insulator is placed within the metallic shell to be in alignment with the semiconductor tip. A center electrode is placed within the insulator, a front end of the center electrode passing through the semiconductor tip to provide an annular discharge gap between the front end of the center electrode and that of the ground electrode. A low resistor layer provided on a front end surface of the semiconductor tip. An electrical resistance of the layer is determined to be smaller than that of the semiconductor tip, while a thickness of the layer is such that the layer precedes the semiconductor tip in forming a discharge path between the front end of the center electrode and that of the ground electrode only during a predetermined period after the igniter plug is initially operated.

摘要翻译： 点火塞具有金属外壳，其前端具有管状接地电极。 中空半导体尖端呈倒角锥形，并放置在管状接地电极内。 管状绝缘体放置在金属壳体内以与半导体尖端对准。 中心电极放置在绝缘体内，中心电极的前端穿过半导体尖端，以在中心电极的前端和接地电极的前端之间提供环形放电间隙。 设置在半导体尖端的前端面上的低电阻层。 该层的电阻被确定为小于半导体尖端的电阻，而该层的厚度使得该层在形成中心电极的前端和 接地电极仅在点火器插头最初工作之后的预定时段内。