| 摘要 |
An exhaust gas heat exchanger has a tube which is made of a stainless steel and in which exhaust gas flows, and an inner fin which is made of a stainless steel and arranged in the tube to improve a heat exchange between the exhaust gas and cooling water. The cooling water flows at an outer side of the tube. The fin pitch fp of the inner fin is substantially in the range of 2 mm<fp<=12 mm, and the fin height fh of the inner fin is substantially in the range of 3.5 mm<fh<=12 mm.
|
