| 摘要 |
An axis (45c) of an EGR pipe (45) on an outlet end side three-dimensionally crosses an axis (29c) of an intake pipe (29) so as to create inside the intake pipe (29) a swirl flow of an EGR gas having a swirling component in the same direction as a rotating direction of a compressor impeller (17). The EGR pipe (45) includes an EGP flow restricting portion (53) which is provided with a flow passage area gradually reduced toward the intake pipe (29), in its outlet end side portion. A downstream flow restricting portion (55) is formed at a portion in the intake pipe (29) on an immediately downstream side of a junction with the EGR pipe (45). The downstream flow restriction portion (55) has a flow passage area which becomes gradually smaller toward the compressor (13). |
