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US 6,550,573 B2Granted
Muffler with catalytic converter arrangement, and method
AssigneeDonaldson Company, Inc.
InventorsWayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
Life of this patent
Estimating the term…
Abstract
An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.
Claims32
An exhaust treatment apparatus comprising:
- an outer shell;
- an inlet pipe for directing an exhaust stream into the outer shell and an outlet for allowing the exhaust stream to exit the outer shell, the inlet pipe including a pipe wall, the outlet including an outlet pipe that extends through a resonating chamber, and the outlet pipe including a sonic choke;
- a core positioned within the outer shell, the core including a substrate defining a plurality of channels that extend at least partially through the core, the core also including a catalyst;
- and
- a flow distribution arrangement for distributing the exhaust stream across an upstream side of the core, the flow distribution arrangement including:
- a cover that partially blocks an end of the inlet pipe, the cover defining a plurality of first flow distribution openings for allowing the exhaust stream to pass from the inlet pipe, through the cover to an interior of the outer shell;
- and
- the flow distribution arrangement also including a plurality of second flow distribution openings defined through the pipe wall of the inlet pipe for allowing the exhaust stream to pass in a radial direction from the inlet pipe, through the pipe wall to the interior of the outer shell.
5 more elements
An exhaust treatment apparatus comprising:
- an outer shell;
- an inlet pipe for directing an exhaust stream into the outer shell and an outlet for allowing the exhaust stream to exit the outer shell, the inlet pipe including a pipe wall;
- a core positioned within the outer shell, the core including a substrate defining a plurality of longitudinal channels that extend at least partially through the substrate, the core also including a catalyst;
- a flow distribution arrangement for distributing the exhaust stream across an upstream side of the core, the flow distribution arrangement including:
- an end of the inlet pipe including a crushed region that is crushed radially inwardly so as to be at least partially blocked, the crushed region of the inlet pipe being within 4 inches of an upstream face of the core;
- the flow distribution arrangement also including a plurality of flow distribution openings defined through the pipe wall of the inlet pipe for allowing the exhaust stream to pass in a radial direction from the inlet pipe, through the pipe wall to the interior of the outer shell;
- the inlet pipe being aligned along an axis that intersects the substrate of the core;
- and
- an open region between the crushed region of the inlet pipe and the upstream face of the core, the open region being free of any obstructions to exhaust gas flow.
6 more elements
An exhaust treatment apparatus comprising:
- an outer shell having a core mounting location;
- an inlet pipe for directing an exhaust stream into the outer shell and an outlet for allowing the exhaust stream to exit the outer shell, the inlet pipe including a pipe wall;
- a core positioned within the outer shell, the core including a substrate defining a plurality of longitudinal channels that extend at least partially through the substrate, the core also including a catalyst, the core having an upstream face positioned within 4 inches of the inlet pipe;
- a flow distribution arrangement located at an end portion of the inlet pipe for distributing the exhaust stream across the upstream face of the core;
- and
- an open region extending from the inlet pipe to the upstream face of the core, the open region being free of any obstructions to exhaust gas flow.
3 more elements
An exhaust treatment apparatus comprising:
- an outer shell;
- an inlet pipe for directing an exhaust stream into the outer shell and an outlet for allowing the exhaust stream to exit the outer shell;
- a single core positioned within the outer shell, the core including a substrate defining a plurality of longitudinal channels that extend at least partially through the substrate, the core including an upstream face, the core also including a catalyst, the upstream face of the core being positioned within 4 inches of the inlet pipe;
- a flow distribution arrangement at the inlet pipe for distributing the exhaust stream, the flow distribution arrangement including a flow disbursing structure positioned at an end portion of the inlet pipe;
- and
- an open region extending from the inlet pipe to the upstream face of the core, the open region being free of any obstructions to exhaust gas flow.
3 more elements
Dependencies are inferred from the claim text.