| 摘要 |
A glow plug comprises a ceramic heater having an insulating ceramic substrate, a heating resistor embedded in a front end portion of the ceramic substrate and a pair of first and second electric conductors embedded in the ceramic substrate and electrically connected at front end portions thereof to the heating resistor, a metallic sleeve circumferentially surrounding the ceramic heater with a front end portion of the ceramic heater protruded from the metallic sleeve, a metallic shell fitted onto the metallic sleeve, and a central electrode partly disposed in a rear portion of the metallic shell. The first and second electric conductors have rear end portions exposed at a rear end surface of the ceramic heater and electrically connected to the metallic shell and the central electrode via first and second connecting members, respectively. |
