| 摘要 |
PROBLEM TO BE SOLVED: To provide an EGR cooler capable of being simplified in its shape to allow easy manufacture and of equalizing a flow rate of exhaust gas introduced into a core part.SOLUTION: In an inlet header 20, a curved outer diameter portion 9a of a curved shape portion 9 is concaved toward a curved inner diameter portion 9b to provide a concavity 21, which forms a restriction section 22 in which the vector B of a flow of exhaust gas from an upstream pipe 5 is directed toward the center P of the upstream pipe 5 in a direction of an axis 5S at one end 2a of a core part 2. |
