Knock sensing apparatus with fail indicator for use in an intern

Details Knock sensing apparatus with fail indicator for use in an intern Knock sensing apparatus with fail indicator for use in an intern

1980-10-09

1983-12-06

Gill, James J.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

044185677

ABSTRACT:
The knock sensing equipment has a control circuit which generates gating signals for dividing the operation into a measuring phase and a test phase. In the latter, the possible malfunction of the sensor is determined. During the test phase, the sensor responds either to background noise or to a test voltage and the sensing output signals are compared to a predetermined minimum and/or maximum level. Malfunction is indicated if the signals furnished by the sensor are outside of the indicated range.

REFERENCES:
patent: 2530931 (1950-11-01), Alexander
patent: 4012942 (1977-03-01), Harned
patent: 4243009 (1981-01-01), Staerzl
patent: 4320729 (1982-03-01), Sawada et al.

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