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    • 20. 发明申请
    • Highly insulated exhaust manifold
    • 绝热排气歧管
    • US20070163250A1
    • 2007-07-19
    • US10590172
    • 2005-03-02
    • Ajit SaneBruce BudingerScott ChurbyDan MooreJames Eucker
    • Ajit SaneBruce BudingerScott ChurbyDan MooreJames Eucker
    • F01N5/02F01N7/10F01N3/02
    • F01N3/20F01N13/102F01N13/148F01N13/16F01N2310/00F01N2310/06F01N2370/02F01N2510/06
    • An exhaust manifold (10, 110) is provided having a ceramic inner layer (22, 32) defining an exhaust gas passageway (20), and a composite insulation zone (24, 26) that is highly thermally insulating. In one embodiment, the composite insulation zone (24) includes a plurality of metallic foils (31, 32) in alternating arrangement with layers having insulating qualities. In the composite insulation zone, the layers having insulating qualities can include ceramic layers (26), evacuated spaces, microsphere layers (37) including substantially evacuated microspheres, or a combination of these. A novel sealing arrangement also is provided for sealing the ceramic inner and metallic outer layers of a metal-encased-ceramic exhaust manifold at a location adjacent the inlet port (14, 15, 16) of a runner of the manifold. A sealing gasket (140) is substantially completely encased within or shielded by the metallic outer layer, so as not to contact the cylinder head (115) when assembled to an internal combustion engine.
    • 提供了具有限定废气通道(20)的陶瓷内层(22,32)和高度隔热的复合绝缘区(24,26)的排气歧管(10,110)。 在一个实施例中,复合绝缘区(24)包括与具有绝缘性质的层交替布置的多个金属箔(31,32)。 在复合绝缘区域中,具有绝缘性质的层可以包括陶瓷层(26),抽空空间,包括基本上抽空的微球体的微球层(37)或它们的组合。 还提供了一种新颖的密封装置,用于在邻近歧管的流道的入口(14,15,16)的位置处密封金属包裹陶瓷排气歧管的陶瓷内部和金属外层。 密封垫圈(140)基本上完全包裹在金属外层内或被金属外层屏蔽,以便当组装到内燃机时不接触气缸盖(115)。