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US 12,467,392 B2Granted
Muffler, exhaust system including a muffler, and method of making a muffler for an exhaust system
AssigneePurem GmbH
InventorsMartin Wagmann, Felix Hackländer
Life of this patent
Estimating the term…
Abstract
A muffler for an exhaust system of an internal combustion engine includes at least one muffler component with a perforation defined by a plurality of through-flow openings in a wall of the muffler component. The through-flow openings can be flowed through in a flow direction in the direction from an upstream side of the wall to a downstream side of the wall. At least in the case of some or all of the through-flow openings of the perforation, a through-flow opening flow cross section decreases in the flow direction in order to provide a through-flow opening flow-guiding surface.
Claims14
A muffler for an exhaust system of an internal combustion engine, the muffler comprising:
- at least one muffler component including a wall having a perforation defined by a plurality of through-flow openings formed therein, said through-flow openings defining an opening center axis (O);
- said wall having an upstream side and a downstream side;
- said through-flow openings being provided to accommodate a flowthrough in a flow direction(S) in a direction from said upstream side to said downstream side of said wall;
- and,
- at least a portion of said through-flow openings each being configured to have a through-flow opening flow cross section decreasing in said flow direction(S) to provide a through-flow opening flow-guide surface, said through-flow opening flow-guide surfaces and a corresponding one of said opening center axes (O) conjointly defining an angle lying in a range of from 5° to 15° in the region of an outlet end of the corresponding through-flow opening.
2 more elements
An exhaust system comprising:
- an exhaust gas conduit pipe for conducting exhaust gas from the internal combustion engine;
- a muffler connected to said exhaust gas conduit pipe;
- said muffler including:
- at least one muffler component including a wall having a perforation defined by a plurality of through-flow openings formed therein, said through-flow openings defining an opening center axis (O);
- said wall having an upstream side and a downstream side;
- said through-flow openings being provided to accommodate a flowthrough in a flow direction(S) in a direction from said upstream side to said downstream side of said wall;
- and,
- at least a portion of said through-flow openings each being configured to have a through-flow opening flow cross section decreasing in said flow direction(S) to provide a through-flow opening flow-guide surface, said through-flow opening flow-guide surfaces and a corresponding one of said opening center axes (O) conjointly defining an angle lying in a range of from 5° to 15° in the region of an outlet end of the corresponding through-flow opening.
5 more elements
A method of making a muffler, the muffler including at least one muffler component including a wall having a perforation defined by a plurality of through-flow openings formed therein, said through-flow openings defining an opening center axis (O);
- said wall having an upstream side and a downstream side;
- said through-flow openings being provided to accommodate a flowthrough in a flow direction(S) in a direction from said upstream side to said downstream side of said wall;
- at least a portion of said through-flow openings each being configured to have a through-flow opening flow cross section decreasing in said flow direction(S) to provide a through-flow opening flow-guide surface, said through-flow opening flow-guide surfaces and a corresponding one of said opening center axes (O) conjointly defining an angle lying in a range of from 5° to 15° in the region of an outlet end of the corresponding through-flow opening;
- the method comprising:
- making the at least one muffler component with metal material;
- and,
- forming rim holes in the wall of said at least one muffler component in order to provide the through-flow opening flow guide surface;
- or,
- configuring the at least one muffler component as a plastic molding;
- and,
- molding the through-flow opening flow-guide surfaces onto the wall of the at least one muffler component.
8 more elements
A muffler for an exhaust system, the muffler comprising:
- at least one muffler component including a wall having a perforation defined by a plurality of through-flow openings formed therein, said through-flow openings defining an opening center axis (O);
- said wall having an upstream side and a downstream side;
- said through-flow openings being provided to accommodate a flowthrough in a flow direction(S) in a direction from said upstream side to said downstream side of said wall;
- at least a portion of said through-flow openings being configured to have a through-flow opening flow cross section decreasing in said flow direction(S) in a first through-flow opening opening-length region (L1) corresponding to said wall thickness (W) between said upstream side of said wall and said downstream side of said wall to provide a through-flow opening flow-guide surface;
- a length of extent of said through-flow openings in said flow direction(S) corresponding to a length of extent of said first through-flow opening opening-length region (L1) in said flow direction(S);
- and,
- each of said through-flow opening flow-guide surfaces and a corresponding one of said opening center axes (O) conjointly defining an angle lying in a range of from 5° to 15° in the region of an outlet end of the corresponding through-flow opening.
4 more elements
An exhaust system comprising:
- an exhaust gas conduit pipe for conducting exhaust gas from the internal combustion engine;
- a muffler connected to said exhaust gas conduit pipe;
- said muffler including:
- at least one muffler component including a wall having a perforation defined by a plurality of through-flow openings formed therein, said through-flow openings defining an opening center axis (O);
- said wall having an upstream side and a downstream side;
- said through-flow openings being provided to accommodate a flowthrough in a flow direction(S) in a direction from said upstream side to said downstream side of said wall;
- at least a portion of said through-flow openings being configured to have a through-flow opening flow cross section decreasing in said flow direction(S) in a first through-flow opening opening-length region (L1) corresponding to said wall thickness (W) between said upstream side of said wall and said downstream side of said wall to provide a through-flow opening flow-guide surface;
- a length of extent of said through-flow openings in said flow direction(S) corresponding to a length of extent of said first through-flow opening opening-length region (L1) in said flow direction(S);
- and,
- each of said through-flow opening flow-guide surfaces and a corresponding one of said opening center axes (O) conjointly defining an angle lying in a range of from 5° to 15° in the region of an outlet end of the corresponding through-flow opening.
7 more elements
A method of making a muffler for an exhaust system, the muffler including at least one muffler component including a wall having a perforation defined by a plurality of through-flow openings formed therein, said through-flow openings defining an opening center axis (O);
- said wall having an upstream side and a downstream side;
- said through-flow openings being provided to accommodate a flowthrough in a flow direction(S) in a direction from said upstream side to said downstream side of said wall;
- at least a portion of said through-flow openings being configured to have a through-flow opening flow cross section decreasing in said flow direction(S) in a first through-flow opening opening-length region (L1) corresponding to said wall thickness (W) between said upstream side of said wall and said downstream side of said wall to provide a through-flow opening flow-guide surface, said through-flow opening flow-guide surfaces and a corresponding one of said opening center axes (O) conjointly defining an angle lying in a range of from 5° to 15° in the region of an outlet end of the corresponding through-flow opening;
- and a length of extent of said through-flow openings in said flow direction(S) corresponding to a length of extent of said first through-flow opening opening-length region (L1) in said flow direction(S);
- the method comprising:
- configuring the at least one muffler component as a plastic molding;
- and,
- molding the through-flow opening flow-guide surfaces onto the wall of the at least one muffler component.
5 more elements
Dependencies are inferred from the claim text.