SHEATH HEATER AND GLOW PLUG

PROBLEM TO BE SOLVED: To provide a sheath heater and a glow plug capable of aiming at longer life by restraining invasion of nitrogen in an exoergic coil for a comparatively long period. SOLUTION: The glow plug 1 has a cylindrical main metal fitting 2 and a sheath heater 3 mounted on the main metal...

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Bibliographic Details
Main Authors HACHIYA YOSUKE, MATSUTANI WATARU, NARITA SAORI, SEGAWA MASAYUKI
Format Patent
LanguageEnglish
Published 16.07.2009
Subjects
BLASTING
COMBUSTION APPARATUS
COMBUSTION PROCESSES
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
EXTINGUISHING-DEVICES
HEATING
IGNITION
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a sheath heater and a glow plug capable of aiming at longer life by restraining invasion of nitrogen in an exoergic coil for a comparatively long period. SOLUTION: The glow plug 1 has a cylindrical main metal fitting 2 and a sheath heater 3 mounted on the main metal fitting 2. The sheath heater 3 has a tube 7 extending in the axis C1 direction, a center shaft 8, the exoergic coil 9, and a control coil 10. The tube 7 is formed to satisfy the relationship of 45≤x≤160 when the value obtained by dividing an area of a target coil range TK by a peripheral length of the target coil range TK is x, regarding one target coil range TK among a plurality of coil ranges K surrounded by a contour line G of the exoergic coil 9 in the cross-section including a center axis X1 of the exoergic coil 9. Further, when the aluminum content of the exoergic coil 9 is y (mass%), regarding the target coil range TK, the exoergic coil is formed to satisfy the relationship of 8≤y≤15. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070338563