METHOD FOR CATALYST HEATING CONTROL
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United States of America Patent
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Dec 2, 2016
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Aug 1, 2016
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A method for catalyst heating control for controlling a catalyst heating period of a catalyst heating system in which lambda sensors are each mounted at upstream and downstream sides of a catalyst converter may include determining a temperature of exhaust gas after an engine starts; determining an oxygen storage capacity of a catalyst depending on the determined temperature of the exhaust gas; comparing the determined oxygen storage capacity with a reference value to decide an aging level of the catalyst; and determining times of the catalyst heating period to be different from each other depending on the decided aging level of the catalyst.
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