Electricity: measuring and testing – Electrical speed measuring
Patent
1990-03-16
1991-04-02
Wieder, Kenneth
Electricity: measuring and testing
Electrical speed measuring
361239, G01P 342
Patent
active
050049798
ABSTRACT:
A signal representing the RPM of an internal combustion engine is produced by a signal processor connected to the battery of the vehicle. The signal processor derives an electrical signal from the battery which contains signal components produced by operation of the vehicle ignition system, as well as components from a multitude of other sources such as the voltage regulator, fans, air conditioning and other electrical systems of the vehicle. The signal processor filters and signal processes the signal derived from the vehicle battery to produce a signal having a frequency which is related to the RPM of the engine.
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Makhija Surender K.
Marino Joseph A.
Puetz Peter A.
Taghikhani Majid
Bear Automotive Service Equipment Company
Regan Maura K.
Wieder Kenneth
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