Patent ID: 7895838

Claim:
A control method of an exhaust gas recirculation apparatus that includes a turbocharger provided with a turbine in an exhaust passage and a compressor in an intake passage, a low pressure EGR passage which connects the exhaust passage downstream of the turbine with the intake passage upstream of the compressor, a high pressure EGR passage which connects the exhaust passage upstream of the turbine with the intake passage downstream of the compressor, an exhaust gas control catalyst provided in the exhaust passage downstream of the turbine and upstream of the low pressure EGR passage, an electronic controller, and a catalytic temperature sensor, the method comprising: sensing a catalytic temperature; and simultaneously changing amounts of EGR gas flowing through the low pressure EGR passage and the high pressure EGR passage such that a temperature of the exhaust gas control catalyst is within a target range, wherein when the temperature of the exhaust gas control catalyst is within the target range or below the target range, controlling the amounts of EGR gas flowing through the low pressure EGR passage and the high pressure EGR passage to be larger than the amounts of EGR gas flowing through the low pressure EGR passage and the high pressure EGR passage when the temperature of the exhaust gas control catalyst is above the target range.