| 摘要 |
Sparkplug (1) for the internal combustion engine of a motor vehicle, of substantially cylindrical overall shape, comprising:-an essentially capacitive lower part (C) comprising: . two coaxial electrodes: an internal electrode of axis (D) termed the central electrode (3) and an external electrode termed the shell (2) surrounding the central electrode (3) . an electrically insulating block termed the insulator (4) inserted between the central electrode (3) and the shell (2),-an essentially inductive upper part (I) comprising: . a central sleeve (8) surrounded by a coil (5), a bottom end part (57) of which surrounds a top end part (31) of the central electrode (3) . an external casing (6), . an insulator (7) inserted radially between the casing (6) and the coil (5) characterized in that the top end part (31) of the central electrode (3) has a coating (9) of material which:-has greater electrical conductivity than the material of the central electrode (3),-has no ferromagnetic properties.
|
