Apparatus and method for static testing a spark plug assembled in an internal combustion engine including cracked ceramic insulator detection
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United States of America Patent
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Feb 2, 2016
Grant Date -
Apr 24, 2014
app pub date -
Oct 23, 2012
filing date -
Oct 23, 2012
priority date (Note) -
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Abstract
An apparatus and method is provided for testing a spark plug after the spark plug is assembled in an internal combustion engine. The apparatus includes a high voltage test probe to mechanically probe the spark plug. The high voltage test probe includes a non-electrically conductive part, an electrically conductive ring substantially shielded by the non-electrically conductive part, and a high voltage contactor for electrically connecting to a terminal end of the spark plug. The apparatus also includes a high voltage control box having a high voltage source and an electrical ground, and including at least one of an insulator crack detection circuit and a spark plug firing circuit. The method includes using the apparatus to test assembled spark plugs.
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