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US 11,339,704 B2Granted
Exhaust subsystem with fiber pipe and method of forming fiber pipe
AssigneeNOVO Plastics Inc.
InventorsBaljit Sierra, Udo Gaertner
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Abstract
A substantially metal-free exhaust subsystem includes an exterior housing formed of polymer; and a pipe formed of a layered fibers formed at least partially of glass, and bound by an inorganic binder. The fibers may be glass or ceramic, and may define micro-pores on the interior of the pipe that aid in absorbing acoustic energy, and thereby attenuating exhaust noise.
Claims16
An exhaust subsystem comprising:
- an exterior housing formed of polymer, defining a cavity;
- and
- a pipe carried by said exterior housing, said pipe defining an interior passage that transports exhaust gases into said cavity to attenuate sound;
- wherein said pipe is formed of layered fibers formed at least partially of glass, and bound by an inorganic binder,
- wherein said fibers define a microporous inner surface of said interior passage, and
- wherein said exhaust subsystem is substantially metal free.
3 more elements
A method of forming a pipe for use in an exhaust subsystem, the method comprising:
- forming at least one layer comprising fiber material and an inorganic binder on a molding core, wherein said molding core is formed of a thermally conductive material;
- and
- curing said inorganic binder, by heating said thermally conductive material by flowing heated gases through said molding core, to form said pipe.
Dependencies are inferred from the claim text.