Abstract: A corona ignition assembly including a firing end assembly and an ignition coil assembly connected by a high voltage connection is provided. The high voltage connection includes a high voltage insulator formed of silicon rubber. A shield formed of metal surrounds the high voltage insulator. The high voltage connection also includes an upper insert formed of metal connecting the shield to the ignition coil assembly and a lower insert formed of metal connecting the shield to the firing end assembly. First portions of the outer surface of the high voltage insulator adhere to the shield, the upper insert, and the lower insert, while second portions of the outer surface do not adhere to at least one of the shield, the upper insert, and the lower insert. A metal braid can be embedded in the high voltage insulator.

Abstract: A glow plug assembly (110) has a metallic heater probe (118) supported within a metal shell (112). A transition zone (144) at the base of the shell (112) includes a membrane (146) and a tube portion (148). A first open end (130) of the heater probe (118) is formed with a reduced diameter pilot section (150) that mates with the tube portion (148) to establish a joint area between the components. The membrane (146) may be made elastically deflectable so as to accommodate integration of a pressure sensor (156) in the glow plug assembly (110).

Abstract: A glow plug assembly (110) has a metallic heater probe (118) supported within a metal shell (112). A transition zone (144) at the base of the shell (112) includes a membrane (146) and a tube portion (148). A first open end (130) of the heater probe (118) is formed with a reduced diameter pilot section (150) that mates with the tube portion (148) to establish a joint area between the components. The membrane (146) may be made elastically deflectable so as to accommodate integration of a pressure sensor (156) in the glow plug assembly (110).

Abstract: A glow plug has an annular metal shell and a heater assembly including a central electrode and a heater probe. The metal shell is configured to receive the heater assembly therein. The central electrode has an elongate body extending between a terminal end configured for electrical communication with a power source and an attachment end. The heater probe has an elongate body extending between a proximal end and a free distal end. Either the attachment end of the central electrode or the proximal end of the heater probe has a recessed pocket with a tapered inner surface converging axially extending axially therein. The other of the attachment end of the central electrode or the proximal end of the heater probe has a tapered outer surface configured for receipt in the recessed pocket.

Abstract: A glow plug (10) which includes an annular metal shell (12), thermally conductive tubular sheath (20), electrode (22), resistance heating element (24), and electrically insulating, thermally conductive powder (26). A metallic seal (28) is disposed in an open end of the sheath (20) in sealing engagement with the electrode (22). An insulating layer (54) is formed on the outer surface of the electrode (22) so as to prevent electrical conductivity between the metal seal (28) and the electrode (22). An optional secondary metal layer (56) may be disposed between the insulating layer (54) and the metal seal (28).

Abstract: A glow plug which includes an annular metal shell, thermally conductive tubular sheath, central electrode; resistance heating element, and electrically insulating, thermally conductive powder includes a glass seal in sealing engagement with the sheath and the electrode to form a sealed cavity within the sheath. The glass seal may include silicate, borate and borosilicate glasses, and may include one or more transition metal oxides, such as oxides of chromium, cobalt, nickel, iron and copper. The glass may also include a filler, including a ceramic oxide, such as one selected from a group consisting of quartz, eucryptites, leucites, cordierites, beta-spodumene, glass-ceramics, low-expansion glass(CTE<5 ppm/° C.), mullite, zircon, zirconia and alumina. The sealed cavity may house a protective inert gas.