Tachometer system for measuring the RPM of an internal combustion engine with no physical or visual connection
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United States of America Patent
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Sep 29, 1992
Grant Date -
N/A
app pub date -
Jul 6, 1988
filing date -
Jul 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tachometer system for an internal combustion engine. The tachometer system uses one of two electromagnetic pulse sensing means to detect an electromagnetic signal produced by a firing of the engine. The sensing device may be an antenna or an inductive pickup. One of the signals is chosen and processed. A parameter indicative of pulse timing in the output signal is determined. This parameter is most advantageously a time between different ones of the output signals. The parameter is then converted into a value indicative of revolutions per unit time of the engine. The converting structure is advantageously formed by a personal computer.
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