To improve cooling efficiency of exhaust gas in an exhaust gas cooling adapter for an internal combustion engine.
A passage cross-sectional area of an exhaust passage 22 of the exhaust gas cooling adapter 8 is reduced as it goes from a side of an exhaust port 12 to a side of an exhaust manifold 10. The exhaust gas flowing from the exhaust port 12 into the exhaust passage 22 is cooled while flowing and the volume is reduced. The passage cross-sectional area of the exhaust passage 22 is also reduced, thereby preventing the reduction in flow velocity and improving cooling efficiency. The passage cross-sectional area of a water jacket 24 is enlarged in an exhaust downstream side, so that cooling water flows at high speed on the side of the exhaust port 12. Accordingly, the exhaust gas can be efficiently cooled on the side of the exhaust port 12, which is a high temperature side, and film boiling can be prevented. Thus, the cooling efficiency is not reduced. In addition, the passage cross-sectional area of the water jacket 24 is enlarged on the exhaust downstream side, thereby reducing the pressure loss of a pump.
HOSHI KOICHI
SHINODA SACHIHISA
MITANI SHINICHI
TOYOTA MOTOR CORP
| JP2011058459A | 2011-03-24 | |||
| JP2007285264A | 2007-11-01 |
Makoto Onda
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