Glow plug with electronic component for switching between heating and ion sensing functions
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United States of America Patent
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-
Nov 21, 2000
Grant Date -
N/A
app pub date -
Nov 15, 1999
filing date -
Nov 13, 1998
priority date (Note) -
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Abstract
A glow plug comprises a heating rod with an inner heater coil and optionally at least one control coil, the heating rod being insulated from the glow plug body and is provided with a plug-type or screw terminal for the power supply voltage. Furthermore, the terminal (4) has an electronic component (6), preferably a chip, with a terminal (7) connected to the power supply voltage, a terminal (8) connected to the glow tube (1.3) and a terminal (9) connected to the body (3). The electronic component (6) is designed as a control element for switching the functioning of the glow plug between a heating function and a sensing function for measuring the ion flow in the combustion space area in proximity to the heating rod (1).
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