| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation device of an engine for a turbocharger-mounted vehicle capable of reducing the number of components, the weight, and the cost with a simple structure.SOLUTION: An exhaust gas introduction passage 20 having an upstream end connected to an exhaust passage 4 on an exhaust downstream side of an exhaust catalyst 16 and having a branch part 19 on a downstream end thereof, a low pressure exhaust gas recirculation passage 21 for communicating the branch part 19 with an intake passage 3 on an intake upstream side of a compressor 7 of a turbocharger 5, and a high pressure exhaust gas recirculation passage 22 for communicating the branch part 19 with the intake passage 3 on an intake downstream side of the compressor 7 are formed in an exhaust gas recirculation passage 18. A switching valve 24 with a flow rate adjusting function is arranged in the branch part 19. The switching valve 24 is switched to any of a state for communicating the exhaust gas introduction passage 20 with the low pressure exhaust gas recirculation passage 21, a state for communicating the exhaust gas introduction passage 20 with the high pressure exhaust gas recirculation passage 22, and a state for not communicating the exhaust gas introduction passage 20 with any of them. |
