Air gap-insulated exhaust manifold for internal combustion engines
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United States of America Patent
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-
Sep 25, 2007
Grant Date -
May 12, 2005
app pub date -
Nov 3, 2004
filing date -
Nov 7, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An air gap-insulated exhaust manifold for internal combustion engines. The manifold includes a flange with openings for fastening elements and further openings, which align with the cylinder exhaust ports of the internal combustion engine. A gas-tight outer shell is connected to the flange. An inner shell is provided with openings, which align with the cylinder exhaust ports of the internal combustion engine. The outer shell has a trough-shaped lower part and a hood-shaped upper part, which is welded gas-tight to the lower part. The inner shell has a trough-shaped lower part and a hood-shaped upper part. The outer shell is connected to the flange in a gas-tight manner. The inner shell is firmly attached to the outer shell at only one place.
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