| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation device suppressing a non-uniform flow speed distribution in the flow passage cross-sectional surface of an intake passage even just on the downstream side of a connection portion between the intake passage and a circulation passage while efficiently introducing exhaust gas into the intake passage. <P>SOLUTION: This EGR device 50 includes: the intake passage 23; an annular flow passage 62 which extends along the peripheral direction of the intake passage 23, is annularly formed, and interiorly surrounds the intake passage 23; an inflow opening 63 which extends in the peripheral directions A of the intake passage 23 between the intake passage 23 and the annular flow passage 62, is annularly formed, and allowing the intake passage 23 and annular flow passage 62 to communicate with each other; an exhaust gas introduction passage 80 communicating with the annular flow passage 62 and introducing the exhaust gas G into the annular flow passage 62 so that the exhaust gas flows in one direction A1 of the peripheral directions A; and regulation walls 300, 301 which are provided in a connection portion between the exhaust gas introduction passage 80 and the annular flow passage 62 and which regulate the inflow of the exhaust gas G into the inflow opening 63. <P>COPYRIGHT: (C)2011,JPO&INPIT |
