Patent ID: 7448205

Claim:
An exhaust gas purifying apparatus in an internal combustion engine provided with an intake path, and a plurality of parallel exhaust paths including at least first and second exhaust paths, the apparatus comprising: catalysts respectively arranged in the plurality of exhaust paths for purifying unclean substances contained in exhaust gas; a first exhaust gas recirculating path for supplying the exhaust gas from the first exhaust path to the intake path; a second exhaust gas recirculating path for supplying the exhaust gas from the second exhaust path to the intake path; an exhaust flow rate adjusting section adjusting a flow rate of the exhaust gas discharged from the first exhaust path to a downstream side; a supply flow rate adjusting section adjusting a flow rate of the exhaust gas supplied to the intake path from the first exhaust path via the first exhaust gas recirculating path; and a control section controlling an opening degree of the exhaust flow rate adjusting section and an opening degree of the supply flow rate adjusting section on the basis of information relating to the temperature of at least one of the catalysts, wherein the control section decreases the opening degree of the exhaust flow rate adjusting section and increases the opening degree of the supply flow rate adjusting section in such a manner that a ratio of the flow rate of the exhaust gas discharged from the first exhaust path with respect to the flow rate of the exhaust gas discharged from the other exhaust paths than the first exhaust path becomes smaller in a case that the temperature of the catalyst arranged in the other exhaust paths exists in a preset low temperature region than in other cases.