| 摘要 |
PROBLEM TO BE SOLVED: To improve energy efficiency in an exhaust gas system of an internal combustion engine equipped with a thermoelectric generator.SOLUTION: A heat transmission device includes heating tubes 16 for transporting exhaust gas; cooling tubes 17 for transporting a fluid-type coolant; and thermoelectric generators 13 generating voltage from temperature difference, and disposed between the heating tubes 16 and the cooling tubes 17. Each of the heating tubes 16, the thermoelectric generators 13, and the cooling tubes 17 is adjacent in a stacking direction 18, and forms a stack. A supporting tube 28 is disposed on each of the heating tubes 16 and/or the cooling tubes 17, and the supporting tube 28 is supported by wall portions facing each other of the tubes 16 and 17. The supporting tubes 28 are disposed adjacent to each other in the tubes 16 and 17 intersecting its longitudinal direction 31, and have different tube length and/or tube end portions 30 and/or tube cross sections. |
