Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
Patent
1979-12-13
1981-04-21
Gill, James J.
Measuring and testing
Engine detonation
Combustion signal compared to reference signal varied by a...
73116, G01L 2322
Patent
active
042625246
ABSTRACT:
This invention relates to an instrument for measuring spontaneous ignition in a cylinder of an internal combustion engine. The instrument comprises a logic gate unit, which receives pulses representative of gas ionizations between the plug electrodes and control signals having a repetition period corresponding to a prefixed number of active cycles of the cylinder being checked and a duration corresponding to a prefixed number of passive cycles of the same cylinder during a spontaneous ignition measurement stage. The logic gate unit delines a first counting signal each time it receives a control signal and a second counting signal each time it receives a pulse during the duration of said control signal. First and second counter means receive and count said first and second counting signals, thus providing an indication of the number of measurement stages effected and respectively, of the number of measurement stages, in which spontaneous ignition has occurred.
REFERENCES:
patent: 3030799 (1962-04-01), Hopkins
patent: 3286164 (1966-11-01), DeHuff
Russo Luigi
Spaggiari Luciano
Alfa Romeo S.p.A.
Brown Charles E.
Gill James J.
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