CATALYST DAMAGE PREVENTION APPARATUS USING A BYPASS VALVE AND A CONTROL METHOD THEREOF

摘要

PURPOSE: A catalyst damage prevention apparatus and a control method thereof are provided to guide exhaust gas not to pass through a catalyst converter when cutting off fuel supply.;CONSTITUTION: A catalyst damage prevention apparatus comprises a catalytic converter(20), a bypass line(30) and a bypass valve(40). The bypass line connects the front and rear sides of the catalytic converter. The bypass valve is installed in front of the catalyst converter so that exhaust gas is discharged by selectively bypassing the catalyst converter.;COPYRIGHT KIPO 2010