Method for diagnosing egr system
AssigneesKia Motors Corporation, Hyundai Motor Company
InventorSeung Hee Han
Life of this patent
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Abstract
A method for diagnosing an exhaust gas recirculation (EGR) system includes: a setting step of setting a temperature map with respect to a temperature at an outlet side of an EGR line for an output value reflecting a driving state of a vehicle in a state in which an EGR valve is closed; a measuring step of measuring the temperature at the outlet side of the EGR line at the time of an operation of the EGR system; and a diagnosing step of diagnosing that a fault has been generated in an EGR system when the measured temperature at the outlet side of the EGR line is equal to or less than a reference value set in the temperature map.
Claims8
A method for diagnosing an exhaust gas recirculation (EGR) system, comprising:
- setting a temperature map with respect to a temperature at an outlet side of an EGR line for an output value reflecting a driving state of a vehicle in a state in which an EGR valve is closed;
- measuring the temperature at the outlet side of the EGR line at a time of an operation of the EGR system;
- and
- diagnosing that a fault has been generated in an EGR system when the measured temperature at the outlet side of the EGR line is equal to or less than a reference value set in the temperature map.
Dependencies are inferred from the claim text.