INTERNAL COMBUSTION ENGINE FITTED WITH COMBUSTION PRESSURE DETECTION DEVICE, AND COMBUSTION PRESSURE DETECTION DEVICE

摘要

An internal combustion engine fitted with a combustion pressure detection device includes: an internal combustion engine having a combustion chamber, and an opening formed in the wall surface configuring the combustion chamber, connecting to the combustion chamber and having a wider diameter on the near side than on the far side; a pressure detection device (5) having a housing, a diaphragm, and a detection member, the housing having a cylindrical shape insertable into the opening of the internal combustion engine, narrower on the front end side in the insertion direction, in accordance with the diameter of the opening on the far side, wider on the rear end side, in accordance with the diameter of the opening on the near side, and having a shoulder part (a sloping surface (315a)) between the front end side and the rear end side, the diaphragm provided on the front end side of the housing, in the insertion direction, and the detection member arranged inside the housing and behind the diaphragm, and detecting the pressure working via the diaphragm; and a second seal member (72) in a ring shape, having a cross section in an opening shape, that seals the opening in the combustion chamber and the housing, in the shoulder part (the sloping surface (315a)) of the housing in the pressure detection device (5).