Controlled temperature catalytic converter, in particular for a motor vehicle
AssigneeValeo Thermique Moteur
InventorDenis Perset
Life of this patent
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Abstract
A catalytic converter includes a casing connected to the output from an exhaust gas and residue manifold of an engine, in particular an engine of a motor vehicle. The casing contains arrangements for oxidizing the exhaust gases and residues and for trapping the oxidized gases and residues. A central part of the casing houses cooling arrangements for reducing the temperature of the gases and residues upstream of the trapping arrangements below a predetermined threshold.
Claims19
A catalytic converter comprising a casing having an entry end connected to an outlet of an exhaust gas and residues manifold of an engine and housing catalyst means for modifying at least some of said exhaust gases and residues and trap means for retaining at least some of the modified gases and residues, wherein said casing has a central part downstream of said catalyst means and upstream of said trap means housing a heat exchanger adapted to reduce the temperature of said gases and residues upstream of said trap means below a predetermined threshold, wherein said heat exchanger has a cross-section of smaller area than the inside cross-section of said casing so that a passage having a cross-section equal to the difference between said cross-sections of said exchanger and said casing allows direct communication between areas on respective opposite sides of said central area in said casing.
A catalytic converter comprising a casing having an entry end connected to an outlet of an exhaust gas and residues manifold of an engine and housing catalyst means for modifying at least some of said exhaust gases and residues and trap means for retaining at least some of the modified gases and residues, wherein said casing has a central part downstream of said catalyst means and upstream of said trap means housing cooling means adapted to reduce the temperature of said gases and residues upstream of said trap means below a predetermined threshold, wherein said casing comprises an empty area between said catalyst means and said cooling means for distributing the modified gases and residues.
A catalytic converter comprising a casing having an entry end connected to an outlet of an exhaust gas and residues manifold of an engine and housing catalyst means for modifying at least some of said exhaust gases and residues and trap means for retaining at least some of the modified gases and residues, wherein said casing has a central part downstream of said catalyst means and upstream of said trap means housing cooling means adapted to reduce the temperature of said gases and residues upstream of said trap means below a predetermined threshold, wherein said casing comprises an empty area between said cooling means and said trap means for distributing the modified and cooled gases and residues.
A catalytic converter comprising a casing having an entry end connected to an outlet of an exhaust gas and residues manifold, and housing agents for modifying at least some of said exhaust gases and residues and oxidizing agents for capturing at least some of the modified gases and residues, wherein said casing has a central part downstream of said agents for modifying at least some of said exhaust gases and residues and upstream of said oxidizing agents for capturing at least some of the modified gases and residues housing a heat exchanger adapted to reduce the temperature of said gases and residues upstream of the oxidizing agents for capturing at least some of the modified gases and residues below a predetermined threshold, said casing further having an empty area between the agents for modifying at least some of said exhaust gases and residues and the heat exchanger for distributing the modified gases and residues and an empty area between the oxidizing agents for capturing at least some of the modified gases and residues and the heat exchanger for distributing the modified and cooled gases and residues.
Dependencies are inferred from the claim text.