Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1980-09-29
1983-02-01
Krawczewicz, Stanley T.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
73116, G01P 348
Patent
active
043718353
ABSTRACT:
An internal combustion engine rpm detection system, which detects the rpm of an automotive internal combustion engine, comprises a magnetic sensor section for forcibly magnetizing a valve rocker arm in the neighborhood of an oil inlet formed in a cylinder head cover of the internal combustion engine and for detecting the magnetic field changes in the valve rocker arm accompanying the motion thereof. A processing section supplies a drive signal to said magnetic sensor section and converts the output of said magnetic sensor section representing magnetic field changes accompanying the rocking motion of the valve rocker arm into a pulse signal. The magnetic sensor section and processing section are removably mounted as an integral unit in the oil inlet of the engine.
REFERENCES:
patent: 4266192 (1981-05-01), Ohtani
patent: 4292670 (1981-09-01), Reid et al.
Akita Sigeyuki
Fujikawa Katsuhisa
Kago Yoshiyuki
Krawczewicz Stanley T.
Nippon Soken Inc.
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