METHOD AND DEVICE FOR JUDGING PROPRIETY OF EGR VALVE OPERATION
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United States of America Patent
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Issued Date -
Sep 5, 2013
app pub date -
Dec 2, 2011
filing date -
Dec 6, 2010
priority date (Note) -
Abandoned
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Abstract
Provided are a temperature sensor 15 for detecting a temperature surrounding an EGR valve 12, judging means (IC chip 16) for judging on the basis of the detected temperature from the temperature sensor 15 whether an inside of a gas passage in the EGR valve 12 is frozen or not and a controller 17 for controlling an operation of the EGR valve 12. The controller 17 is adapted to forbid and allow an output of an operating command 17a to an actuator 14 for the EGR valve 12 when an inside of a gas passage in the EGR valve 12 is judged by the judging means (IC chip 16) to be frozen or unfrozen, respectively.
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