| 摘要 |
PURPOSE:To accurately measure combustion pressure by providing a quenching body which is made of a material with good heat conductivity and has many air holes across in a pressure intake passage. CONSTITUTION:The pressure intake passage 31 which is open at the tip of a metallic housing 2 is provided in the housing and a pressure receiving diaphragm 4 to which a strain gauge is added is provided at the internal end of the intake passage 31. The quenching body 1 is provided across in the intake passage 31 in its middle and the quenching body 1 is made of the material with good heat conductivity and has many air holes. Then, the combustion pressure is applied to the diaphragm 4 from the intake passage 31 to make the diaphragm deform, and the output corresponding to the deformation strain is outputted by the strain gauge. At this time, flames may enter the intake passage 31 possibly, but when the flames pass through the quenching body 1 provided in the intake passage 31, the heat is absorbed and the flames are extinguished, so that they do not reach the diaphragm 4. |
