发明名称 |
Knock detecting apparatus for internal combustion engines |
摘要 |
A knock detecting apparatus for detecting the occurrence of knocking in an internal combustion engine by detecting variations in the pressure of engine cooling water. A sealed double diaphragm structure is formed by a first diaphragm which is directly responsive to variations in the cooling water pressure and not resonant at the knock frequencies and a second diaphragm which is resonant at the knock frequencies. A noncompressible fluid is contained in the sealed double diaphragm structure between the two diaphragms. Pulsations of the second diaphragm, resonant at the knock frequencies, are detected by a magnetic device or a piezoelectric device operative to output an ac signal.
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申请公布号 |
US4462247(A) |
申请公布日期 |
1984.07.31 |
申请号 |
US19820354434 |
申请日期 |
1982.03.03 |
申请人 |
NIPPON SOKEN, INC.;TOYOTA JIDOSHA KOGYO KABUSHIKI KAISHA |
发明人 |
HATTORI, TADASHI;HANAOKA, MASANORI;HASHIGUCHI, YUKIHIDE;OOTSUKA, YOSHINORI;YAMAGUCHI, HIROAKI |
分类号 |
F02P5/152;F02P5/153;G01H11/02;G01H11/08;G01L23/22;(IPC1-7):G01L23/22 |
主分类号 |
F02P5/152 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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