| 摘要 |
PURPOSE:To allow a relatively large quantity of exhaust gas to recirculate even in the engine operation state where the air-fuel ratio in a combustion chamber is rich, as to the exhaust gas recirculation device of an internal combus tion engine. CONSTITUTION:An exhaust gas recirculation device is equipped with a catalyst 7 installed midway in an exhaust gas recirculation passage 6, opened port part 6a for taking-in air which is installed on an exhaust passage 2 side in comparison with the catalyst 7 in the recirculation passage 6, air-fuel ratio sensor 10 installed on an intake passage 3 side from the opened port part, and adjusting means 8 and 11 for adjusting the quantity of the air taken in from the opened port part 6a on the basis of the output of the air-fuel ratio sensor 10. |
