Apparatus and method for testing an ignition coil and spark plug
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United States of America Patent
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-
Jul 30, 2002
Grant Date -
N/A
app pub date -
Mar 29, 1999
filing date -
Mar 31, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for testing spark plugs and ignition coils. An apparatus includes a power supply for supplying power to an ignition coil to generate a spark across a spark plug. A capture circuit captures an energy signal reflected from the ignition coil in response to the spark. A comparator circuit compares the captured energy signal to a predetermined signal. A method includes the steps of supplying power to an ignition coil to generate a spark across a spark plug, capturing an energy signal reflected from the ignition coil in response to the spark and comparing the captured energy signal to a predetermined signal. The predetermined signal represents one of a distinct group of reflected energy signals which indicate various defects in the coil or plug. Preferably, a match between the captured energy signal and the predetermined signal is used to indicate to the user a defective coil or plug.
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