Catalytic converter for motorcycles
AssigneeCorning Incorporated
InventorSuresh T. Gulati
Life of this patent
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Abstract
A device suitable for use as a catalytic converter for the purification of exhaust gases from an internal combustion engine includes a ceramic monolith catalyst element resiliently mounted within a metallic housing. The metallic housing is in turn mounted within a hot gas chamber, such as an expansion chamber or muffler of a motorized vehicle. The ceramic monolith is wrapped with an insulating layer of inorganic ceramic fiber. At least one layer of intumescent material is disposed between the metallic housing and the inorganic fiber layer.
Claims31
An apparatus for treating exhaust gases comprising:
- a hot gas chamber defined by an outer peripheral wall;
- an exhaust pipe extending substantially into said hot gas chamber;
- and
- at least one support mounted within the chamber such that exhaust gas in the chamber substantially surrounds the support, said support comprising:
- a ceramic honeycomb structure having gas flow passages extending between two opposite ends wherein the passages are defined by walls encompassed within a honeycomb peripheral wall extending between the ends,
- a housing surrounding and spaced from the honeycomb peripheral wall,
- a first inorganic fiber layer around the honeycomb peripheral wall, and
- at least one layer of intumescent material between the first inorganic fiber layer and the housing.
A motorcycle having an exhaust system comprising:
- a hot gas chamber;
- and
- at least one support mounted within the chamber such that exhaust gas in the chamber substantially surrounds the supports, said support comprising:
- a ceramic honeycomb structure having gas flow passages extending between two opposite ends wherein the passages are defined by walls encompassed within a peripheral wall extending between the ends,
- a housing surrounding and spaced from the peripheral wall,
- a first inorganic fiber layer around the peripheral wall,
- at least one layer of intumescent material between the first inorganic fiber layer and the housing, and
- a second inorganic fiber layer between said at least one layer of instrument material and said housing.
A motorcycle having an exhaust system connected to a two-cycle engine, said exhaust system being provided with an apparatus for treating exhaust gases, said apparatus comprising;
- an expansion chamber;
- and
- at least one support mounted within the chamber such that exhaust gas in the chamber substantially surrounds the support, said support comprising:
- a ceramic honeycomb structure having gas flow passages extending between two opposite ends wherein the passages are defined by walls encompassed within a peripheral wall extending between the ends,
- a housing surrounding and spaced from the peripheral wall,
- a first inorganic fiber layer around the peripheral wall,
- at least one layer of intumescent material between the first inorganic fiber layer and the housing, and
- a second inorganic fiber layer between said at least one layer of instrument material and said housing.
An apparatus for treating exhaust gases comprising:
- a hot gas chamber;
- at least one support mounted within the chamber such that exhaust gas in the chamber substantially surrounds the support, said support comprising:
- a ceramic honeycomb diesel particulate filter having gas flow passages extending between two opposite ends wherein the passages are defined by walls encompassed within a peripheral wall extending between the ends,
- a housing surrounding and spaced from the peripheral wall,
- a first inorganic fiber layer around the peripheral wall, and
- at least one layer of intumescent material between the first inorganic fiber layer and the housing.
Dependencies are inferred from the claim text.