Apparatus for detecting and displaying engine speed

Details Apparatus for detecting and displaying engine speed Apparatus for detecting and displaying engine speed

1994-02-03

1996-03-05

O'Shea, Sandra L.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Apparatus for coupling a measuring instrument to an ignition...

324390, F02P 1700

Patent

active

054970920

ABSTRACT:
Apparatus for detecting and displaying the revolution speed of an internal combustion engine having an electrical distribution system including at least one spark plug includes a hand held housing having a digital display. An antenna is connected to the housing which is for placement adjacent to the spark cable. A pulse to direct digital interphase circuit is in the housing and counts the electrical energy pulses received by the antenna from the spark cable within a predetermined time frame to determine electrical pulse frequency and to convert the determined electrical pulse frequency into internal combustion engine revolution speed and to display the internal combustion engine revolution speed on the digital display.

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patent: 5091695 (1992-02-01), Shaland
Electronic Design, pp. 52-53, vol. 4, No. 6, Mar. 15, 1956, Keithly Instruments, Inc.

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