| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for generating differential pressure between a low-pressure EGR passage and an exhaust passage interposing a communication passage therebetween to discharge condensate in the low-pressure EGR passage by using the communication passage, in an exhaust recirculation device for an internal combustion engine. SOLUTION: The exhaust recirculation device for an internal combustion engine comprises: a turbocharger 5; the low-pressure EGR passage 31; a low-pressure EGR cooler 33; an exhaust throttle valve 10; the communication passage 11 connecting the low-pressure EGR passage 31 downstream a low-pressure EGR cooler 33 with the exhaust passage 4 downstream the exhaust throttle valve 10; and a condensate discharge means closing the exhaust throttle valve 10 and increasing pressure in the low-pressure EGR passage 31 to discharge the condensate of the low-pressure EGR passage 31 to the exhaust passage 4 by using the communication passage 11. COPYRIGHT: (C)2008,JPO&INPIT
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