| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine utilizing spark ignition combustion and compression ignition combustion together and capable of raising the temperature of exhaust gas and improving exhaust gas post-treatment performance by joining both exhaust gases when compared with a case where only compression ignition combustion is utilized. SOLUTION: This internal combustion engine lets a part of cylinders (No. 1 and No.2) perform spark ignition combustion and lets the other cylinders (No. 3 and No.4) perform compression ignition combustion. An exhaust manifold 12 joins exhaust gases of the No. 1 and No. 2 cylinders performing the spark ignition combustion and exhaust gases of the No. 3 and No. 4 cylinders performing the compression ignition combustion mutually (13, 14) first of all, and three-way catalyst 15 is arranged on the downstream side of a joining part 13 of the No. 1 and No. 2 cylinders. Next, the exhaust manifold joins joining exhaust gases of the No. 1 and No. 2 cylinders and joining exhaust gases of the No. 3 and No. 4 cylinders mutually (17), and oxidation catalyst 18 is arranged on the downstream side of a joining part 17. An intake restricting means (a second throttle valve) 11 for restricting amount of intake air in the No. 1 and No. 2 cylinders performing the spark ignition combustion is provided. COPYRIGHT: (C)2007,JPO&INPIT
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