Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
Patent
1979-04-26
1980-11-18
Gill, James J.
Measuring and testing
Engine detonation
Combustion signal compared to reference signal varied by a...
73654, 73660, G01L 2322, G01M 1500
Patent
active
042338360
ABSTRACT:
A system for detecting the intensity of knocking of an internal combustion engine such as an automotive gasoline engine, comprising a vibration sensing device attached to an engine body and electrical circuitry for producing a knock-indicating signal based on a comparison of a vibration-indicating signal derived from the vibration sensing device with a reference signal which is variable depending on the rate of engine revolution. The vibration sensing device comprises a vibration pickup such as of an accelerometer type, preferably mounted on a resonance plate which is fixed only at its one end to the engine body, and is made to have a resonance frequency within a frequency band of vibrations attributable to knocking of the engine, such as 5 to 10 KHz, so that no band-pass filter is needed in this system.
REFERENCES:
patent: 2560734 (1951-07-01), Mowzon
patent: 2607215 (1952-08-01), De Boisblanc
patent: 3002062 (1961-09-01), Globe
patent: 4002155 (1977-01-01), Harned et al.
patent: 4012942 (1977-03-01), Harned
patent: 4153020 (1979-05-01), King et al.
patent: 4161665 (1979-07-01), Buck et al.
Takagi Yasuo
Yoneda Kenji
Gill James J.
Nissan Motor Company Limited
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