COMBUSTION PRESSURE SENSOR, COMBUSTION PRESSURE SENSOR USED ALSO AS GLOW PLUG, MANUFACTURING METHOD OF COMBUSTION PRESSURE SENSOR AND MANUFACTURING METHOD OF COMBUSTION PRESSURE SENSOR USED ALSO AS GLOW PLUG

PROBLEM TO BE SOLVED: To provide a combustion pressure sensor of which a connection member and a housing are firmly welded together, and further to provide a combustion pressure sensor used also as a glow plug, a manufacturing method of the combustion pressure sensor and a manufacturing method of the combustion pressure sensor used also as a glow plug.SOLUTION: A combustion pressure sensor 1 comprises: a cylindrical housing 100 extending in an axial direction DX; a displacement member 130 disposed inside the housing 100; and a cylindrical connection member 160 for elastically coupling the displacement member 130 to the housing 100. The combustion pressure sensor 1 has a housing welded portion W1 being obtained by annularly energy beam welding the housing 100 and the connection member 160 in a circumferential direction while spacing the housing 100 and the connection member 160 apart from each other in at least parts of circumferential directions thereof and including a form that a part of the housing 100 is melted in a tapered and wedge-shaped manner in a longitudinal section of the combustion pressure sensor 1. The housing welded portion W1 includes a protrusion housing welding portion RW1 protruding from a first adjacent portion 176 in at least a part of the circumferential direction at a side toward the first adjacent portion 176 from a second adjacent portion 196 out of a radial direction DR. 【課題】 連結部材とハウジングとを強固に溶接した燃焼圧センサを提供する。また、グロープラグ兼用燃焼圧センサ、燃焼圧センサの製造方法及びグロープラグ兼用燃焼圧センサの製造方法を提供する。【解決手段】 燃焼圧センサ１は、軸線方向ＤＸに延びる筒状のハウジング１００と、ハウジング内に配置された変位部材１３０と、変位部材をハウジングに弾性的に連結する筒状の連結部材１６０とを備える。ハウジングと連結部材とを、これらの周方向の少なくとも一部で離間させつつ、周方向に環状にエネルギービーム溶接してなり、燃焼圧センサの縦断面において、ハウジングの一部が先細の楔状に溶け込んだ形態を含むハウジング溶接部Ｗ１を有し、ハウジング溶接部は、径方向ＤＲのうち第２隣接部１９６から第１隣接部１７６に向かう側に、第１隣接部より隆起した隆起ハウジング溶接部ＲＷ１を周方向の少なくとも一部に含む。【選択図】 図３