| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a combustion pressure sensor having effect to prevent burning-up of soot.SOLUTION: A pressure-measuring plug comprises: a plug body 102 which includes a body tip section 106 facing a combustion chamber being used and a passage; and a ring-shaped sensing structure 104 including an outer section 104A, an inner section 104B, and an annular diaphragm 104D. The plug body is attached to the outer section 104A. The pressure-measuring plug further comprises a circular membrane 105, and the circular membrane provides a sealing for protecting the annular diaphragm 104D against a harsh environment in the combustion chamber. The pressure-measuring plug further comprises a plug chamber 107 formed of the circular membrane 105 and the body tip section 106, and the passage of the body tip section provides an open connection between the plug chamber and the combustion chamber. The passage is part of a channel structure which functions as a soot filter.</p> |
