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OwnerAjit Sane, Bruce Budinger +3inventors
InventorsAjit Sane, Bruce Budinger, Scott Churby, Dan Moore, James Eucker
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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.
An exhaust manifold comprising a ceramic inner layer defining an exhaust gas passageway, a composite insulation zone disposed exterior to and adjacent said inner layer, a strain isolation layer disposed between said composite insulation zone and said outer structural layer, and an outer structural layer disposed exterior to said composite insulation zone, said composite insulation zone comprising at least one metallic foil layer.
(canceled)
An exhaust manifold comprising a ceramic inner layer defining an exhaust gas passageway, an outer structural layer disposed exterior to said ceramic inner layer, and a strain isolation layer disposed intermediate said ceramic inner layer and said outer structural layer, said strain isolation layer comprising an intumescent mat.
An exhaust manifold having a main tube portion and at least one runner extending from said main tube portion and having an inlet port located at a terminal end of the runner, the runner comprising a ceramic inner layer that is substantially encased within and spaced apart from a metallic outer layer, said ceramic inner layer defining an exhaust gas passageway therein for conducting exhaust gas from said inlet port toward and into said main tube portion of said manifold,
An exhaust manifold comprising a ceramic inner layer encased within and spaced apart from a metallic outer layer thus defining an annular space therebetween, said manifold having a main tube portion and at least one runner extending from said main tube portion,
Dependencies are inferred from the claim text.