| 摘要 |
The glow plug has an insulating cylindrical substrate (22) comprising an internal and external portion. The internal portion (28) lies between one end of a metal shell (12) and an electrical terminal (36). The external portion (30) protrudes from the shell and terminal. The terminal lies axially inside the cylindrical metal shell and is insulated from it. - A resistive surface film heater (24) lies between the terminal and shell and is located on the surface of the external portion near to the end of the substrate. A conducting surface film (56) lies on the external surface of the substrate and connects one end of the heater to the shell. A second conducting surface film (58) lies on the internal surface of a concentric hole (26) in the substrate and connects the other end of the heater to the terminal. (1/5) EPAB- EP-129676 B The glow plug has an insulating cylindrical substrate (22) comprising an internal and external portion. The internal portion (28) lies between one end of a metal shell (12) and an electrical terminal (36). The external portion (30) protrudes from the shell and terminal. The terminal lies axially inside the cylindrical metal shell and is insulated from it. - A resistive surface film heater (24) lies between the terminal and shell and is located on the surface of the external portion near to the end of the substrate. A conducting surface film (56) lies on the external surface of the substrate and connects one end of the heater to the shell. A second conducting surface film (58) lies on the internal surface of a concentric hole (26) in the substrate and connects the other end of the heater to the terminal. (16pp Dwg.No.1/5) - EP-129676 B A glow plug comprising a hollow cylindrical metal shell (12), an axial terminal (36) disposed concentrically in said shell (12) and insulated therefrom, an electrically nonconductive cylindrical substrate (22) having an internal portion (28) retained within the shell (12) by the axial terminal (36) and an external portion (30) axially extending from the shell (12), a resistive surface film heater element (24) disposed along at least the external surface of thesubstrate (22), one end of the said heater element (24) in electrical contact with the shell (12) and the other end of the heater element (24) in electrical contact with the axial terminal (36) characterised in that the cylindrical substrate (22) further comprises a concentric bore (26) passing through the whole length of the substrate (22), and said heating element (24) extends around the end (52) of the substrate's external portion (30) and along the internal surface of axial bore (26). (7pp) USAB- US4582981 A A hollow cylindrical metal shell, an axial electrical terminal, and a heater member protruding externally from the shell are included. The member has a film element disposed on at least one surface of a nonconductive cylindrical substrate. Electrical connections between the heater element, the shell and the axial electrode are made by conductive surface films. - One of the surface films is disposed on the external surface of the substrate, makes electrical contact with the shell. A second film disposed on the internal surface of the substrate makes contact with the axial terminal. The heating element is preferably a transition metal surface film which catalytically reacts with the air/fuel mixture to enhance combustion at lower temperatures.
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