Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
Patent
1981-12-28
1984-06-05
Gill, James J.
Measuring and testing
Engine detonation
Combustion signal compared to reference signal varied by a...
73707, G01L 2322
Patent
active
044520697
ABSTRACT:
A method of sensing a knocking taking place in an internal combustion engine through the sensing of pulsative component of the cooling water pressure or lubricating oil pressure. The sensing of the pulsative component is made by removing the static component from the composite pressure which is the sum of the pulsative component and the static component. An apparatus for sensing a knocking taking place in an internal combustion engine has a differential pressure sensing mechanism including a pressure sensing diaphragm and a pulsation absorption mechanism. The pressure sensing diaphragm receives at its one side the composite cooling water pressure or composite lubricating oil pressure which is the sum of the pulsative component and static component. The pulsation absorption mechanism absorbs the pulsative component from the composite pressure so as to transmit only the static component of the pressure to the other side of the pressure sensing diaphragm. In consequence, the pressure sensing diaphragm is deflected only in response to the pulsative component of the pressure without being affected by the static component.
REFERENCES:
patent: 1957894 (1934-05-01), Longenecker
patent: 2306372 (1942-12-01), Banks
patent: 3865100 (1975-02-01), Kanai et al.
patent: 4166382 (1979-09-01), Petersen
patent: 4266421 (1981-05-01), McDougal
Hanaoka Masanori
Hashiguchi Yukihide
Hattori Tadashi
Ootsuka Yoshinori
Yamaguchi Hiroaki
Gill James J.
Nippon Soken Inc.
Toyota Jidosha Kogyo Kabushiki Kaisha
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