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    • 39. 发明申请
    • In-cylinder pressure detection device
    • 缸内压力检测装置
    • US20050229685A1
    • 2005-10-20
    • US11075754
    • 2005-03-10
    • Hideki SakamotoSatoshi YamaguchiYuuichi ShimasakiMakoto KobayashiMasaki UenoMamoru Hasegawa
    • Hideki SakamotoSatoshi YamaguchiYuuichi ShimasakiMakoto KobayashiMasaki UenoMamoru Hasegawa
    • G01L23/10F02D35/00F02D41/14F02D45/00G01M15/00
    • F02P19/028F02D35/023F23Q7/001F23Q2007/002G01L23/22
    • An in-cylinder pressure detection device which is capable of ensuring stable detection accuracy irrespective of tightening torque applied in mounting the in-cylinder pressure detection device and thermal expansion of component parts of the same. A housing 21 has a top wall 22a and a bottom wall 22b opposed to each other, and is screwed into the body of an internal combustion engine. An inner member 24 extends through the housing 21 such that one end thereof projects into a cylinder C, and has a flange part 24b accommodated in the housing 21. A first piezoelectric element 11c is accommodated in the housing 21 and sandwiched between the bottom wall 22b and the flange part 24b in a preloaded state, for outputting a first detection signal q1 according to the in-cylinder pressure transmitted via the inner member 24. A second piezoelectric element 12c is accommodated in the housing 21 and sandwiched between the top wall 22a and the flange part 24b in a preloaded state, for outputting a second detection signal q2 according to the in-cylinder pressure transmitted via the inner member 24.
    • 无论在安装缸内压力检测装置时施加的紧固扭矩和其组成部件的热膨胀,都能够确保稳定的检测精度的缸内压力检测装置。 壳体21具有彼此相对的顶壁22a和底壁22b,并被拧入内燃机的主体中。 内部构件24延伸穿过壳体21,使得其一端突出到气缸C中,并且具有容纳在壳体21中的凸缘部分24b。 第一压电元件11c容纳在壳体21中并且在预加载状态下夹在底壁22b和凸缘部分24b之间,用于根据经由内部传递的缸内压力输出第一检测信号q 1 会员24。 第二压电元件12c容纳在壳体21中,并且以预加载的状态夹在顶壁22a和凸缘部分24b之间,用于根据通过内部的内部传递的缸内压力输出第二检测信号q 2 会员24。