| 摘要 |
PROBLEM TO BE SOLVED: To provide technology for early increasing temperatures in lean combustion cylinders of an internal combustion engine which performs rich combustion and lean combustion to early increase the temperature of an exhaust gas purifying catalyst at cold start. SOLUTION: At cold start, this internal combustion engine control device sets an air-fuel ratio in a cylinder (#1) as part of four cylinders to be rich and an air-fuel ratio in cylinders (#2-#4) as at least part of the other remaining cylinders to be lean for giving reaction between exhaust materials exhausted from the cylinder (#1) where the air-fuel ratio is rich and exhaust materials exhausted from the cylinders (#2-#4) where the air-fuel ratio is lean to increase the temperature of the exhaust gas purifying catalyst. Herein, a cylinder temperature control means is provided for independently changing the temperatures in the cylinders where the air-fuel ratio is lean and in the cylinder where the air-fuel ratio is rich. When increasing the temperatures in the cylinders, the cylinder temperature control means distributes a high temperature cooling water stored in a regenerating system 9 into only the cylinders (#2-#4) where the air-fuel ratio is lean at cold start. COPYRIGHT: (C)2007,JPO&INPIT
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