Patent ID: 8225594

Claim:
A control device of an internal combustion engine, which controls the internal combustion engine performing lean burn and comprising plural cylinders and an exhaust system, the exhaust system comprising: first exhaust valves and second exhaust valves provided in each of the plural cylinders; a first exhaust passage communicating with the first exhaust valves; a second exhaust passage communicating with the second exhaust valves; a first exhaust gas purifying catalyst provided at least one of the first exhaust passage and the second exhaust passage; and a second exhaust gas purifying catalyst provided on an exhaust passage downstream of a junction of the first exhaust passage and the second exhaust passage, the control device comprising: a control unit implemented by a microprocessor and programmed to control the first exhaust valves and the second exhaust valves and to direct rich combustion more to the second exhaust gas purifying catalyst than to the first exhaust gas purifying catalyst, when a part of the plural cylinder performs the rich combustion.