Engine knocking meter

Details Engine knocking meter Engine knocking meter

1977-06-29

1979-08-07

Gill, James J.

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

G01M 1500, G01N 3322

Patent

active

041633857

ABSTRACT:
An engine knocking meter detects a pressure in a cylinder by a pressure sensor, clips a detected signal by a clipping circuit to cut low level noises, supplies an output signal of the clipping circuit to a filter circuit to eliminate noises having frequencies which lie beyond a frequency band of a knocking signal, and supplies an output signal of the filter circuit to a gate which is driven within a given crank angle under the control of a signal from a crank angle sensor mounted on a crank shaft of an engine, for separating the knocking signal.

REFERENCES:
patent: 2448323 (1948-08-01), De Boisblanc
patent: 2534276 (1950-12-01), Lancor
patent: 2619830 (1952-12-01), Piety
patent: 2941396 (1960-06-01), Adams
patent: 3286164 (1966-11-01), Huff
patent: 3324711 (1967-06-01), Wostl

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