Method for controlling a glow plug
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United States of America Patent
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Feb 25, 2014
Grant Date -
Sep 15, 2011
app pub date -
Mar 9, 2011
filing date -
Mar 11, 2010
priority date (Note) -
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Abstract
The invention relates to a method for controlling a glow plug to a target value of the surface temperature while the engine is running. An effective voltage is generated by pulse width modulation of a vehicle electrical system voltage. This effective voltage is applied to the glow plug. The electric resistance of the glow plug is measured and compared to a resistance value expected for the target value of the surface temperature. The effective voltage is varied as a function of the deviation of the measured value of the electric resistance from the expected value of the electric resistance. A pressure sensor of the glow plug is used to measure the combustion chamber pressure. The resistance value expected for the target value of the surface temperature is determined as a function of the combustion chamber pressure.
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