JPWO2020109036A5

JPWO2020109036A5 -

Info

Publication number: JPWO2020109036A5
Application number: JP2021529857A
Authority: JP
Publication date: 2022-11-07

Claims

A gas flow and sound control valve (1) for an exhaust system of an internal combustion engine, comprising:
A Y-shaped housing (3) comprising an inlet (5), a first outlet (10) and a second outlet (20) and a first outlet connecting said inlet (5) to said first outlet (10). and/or a valve member ( 7) and
Said valve member (7) has a first predetermined position in which said valve member (7) closes said second conduit (21) and said valve member (7) closes said first conduit (11). movable with respect to said housing (3) between a second predetermined position and
Said valve member (7) comprises a spoon-like section (71) for directing said exhaust gases from said inlet (5) through said first conduit (11) and/or said second conduit (21). ,
Said spoon-shaped section (71) has an inner surface that merges with an inner conduit surface (15, 25) of said respective first or second open conduit (11, 21) at said first or second predetermined position. defining (75) to delimit said exhaust gas flow path similar to that of a bent pipe;
said valve member (7) being rotatable about a valve axis (A _V ) aligned parallel to the centerline (A ₅ ) of said inlet (5), in particular coaxially ;
Said valve member (7) is mounted in said housing (3) with a central bearing (37) located in said housing (3) between said first outlet (10) and said second outlet (20). 3) is rotatably mounted,
The valve member (7) includes a shaft section ( ₇₇ ) coaxially aligned with the valve stem (AV), extending through the central bearing (37) and through the housing (3). ,
said valve member (7) includes a wedge-shaped transition section (76) disposed between said spoon-shaped section (71) and said shaft section (77);
Said transition section (76) extends radially into said respective open conduit (11, 21) from said upstream tip of said spoon-shaped section (71) at said first or second predetermined position. a transition surface (79) connecting said conduit surfaces (15, 25) of said conduits (11, 21) to said inner surface (75) of a shape corresponding to that of said open conduits (11, 21). ),
A gas flow and sound control valve, characterized in that:

Said spoon-shaped section (71) is dimensioned to cover said second conduit (21) at said first predetermined position and to cover said first conduit (11) at said second predetermined position . ing,
A gas flow and sound control valve according to claim 1, characterized in that:

Said spoon-shaped section (71) spans at least 170° circumferentially around said valve axis (A _V ) along an axial extension along said valve axis (A _V ) greater than 3 cm extend,
3. The gas flow and sound control valve of claim 2, characterized in that:

an inner surface (75) of said spoon-shaped section (71) defines a curved flow path for exhaust gases defining a radius of curvature ( _R7 );
said spoon-shaped section (71) is shaped to define a substantially constant cross-section of said flow path at said first and second predetermined locations;
4. A gas flow and sound control valve according to claim 2 or 3, characterized in that:

The centerlines (A10, A20) of the outlets ( ₁₀ , ₂₀ ) are 10° to 120° to the centerline (A5) of the inlet ( ₅ ) and/or the valve stem ( _AV ). placed with an angular offset of ° ,
Said housing (3) has a first radius of curvature (R10) extending from said inlet (5) to said first outlet ( ₁₀ ) and from said inlet (5) to said second outlet (20). defining a second radius of curvature (R ₂₀ ) ranging from
wherein, in said first or second predetermined position, said radius of curvature (R7) of said valve member ( ₇ ) corresponds to said respective first or second radius of curvature (R10, _R20 ) _; 5. The gas flow and sound control valve of claim 4, characterized by:

said inner surface (75) merging with the inner conduit surface (15, 25) of said respective first or second open conduit (11, 21) at said first or second predetermined position; of said exhaust gas flow path similar to that of a bent pipe, provided with chisel bends and/or formed without obstruction in said respective first or second conduits (11, 21); demarcate boundaries,
3. The gas flow and sound control valve of claim 2 , characterized in that:

Said path of exhaust gas flowing from said inlet (5) along said valve member (7) through said respective conduit (11, 21) to said first or second outlet (10, 20) is essentially defining a constant cross-sectional area,
an inlet funnel is placed upstream of said inlet (5) to guide said path from another cross-section, such as an elliptical cross-section, to said cross-sectional area of said inlet;
A gas flow and sound control valve according to claim 1 , characterized in that:

between the radially outer surface (74) of the spoon section (71) and the housing (3) at least partly along the axial extension of the spoon section (71), the valve stem ( _AV ) A gap (35) is defined radially with respect to
A gas flow and sound control valve according to claim 1 , characterized in that:

said valve member (7) being rotatably mounted in said housing (3) at said inlet (5) using an upstream bearing such as a sliding bushing (32);
said valve member (7) comprises a ring section (73) coaxially surrounding said valve stem (AV) and _engaging said upstream bearing;
A gas flow and sound control valve according to claim 1 , characterized in that:

said transition section (76) defines a shoulder (78) that is wider than said shaft section (77) and engages said central bearing (37);
A gas flow and sound control valve according to claim 1 , characterized in that:

characterized by an actuator (8) for operating said valve member (7),
Said actuator (8) directs said exhaust gas flow and sound to said inlet ( 5) to said first outlet (10) and said second outlet (20) in at least one intermediate position between said first and second predetermined positions. configured to locate a valve member (7);
The gas flow and sound control valve of claim 1 .

said upstream end of said valve member (7) and _said inlet ( ₅ ) are concentrically aligned and/or have identical inner diameters (D5, D7), preferably corresponding to each other;
A gas flow and sound control valve according to claim 1 , characterized in that:

An exhaust gas system (100, 200, 300, 400) for an internal combustion engine, comprising:
2. At least one gas flow and sound control valve (1, 1a, 1b) according to claim 1 , arranged in a distribution connection between said engine and at least one acoustic element (41, 43, 45, 47). with
a first pipe (13, 13a, 13b) is connected to the first outlet (10) and a second pipe (23, 23a, 23b) is connected to the second outlet (20);
Each tube (13, 13a, 13b, 23, 23a, 23b) has at least one acoustic element (41, 43, 45, 47) such as a resonator, expansion chamber, Helmholtz resonator, muffler, absorptive muffler, etc. ),
Exhaust gas system (100, 200, 300, 400).

downstream of said distribution joint where said first and second pipes (13, 13a, 13b, 23, 23a, 23b) are rejoined, further comprising at least one integration joint (50, 50a, 50b); 14. The exhaust gas system (100, 200, 300) of claim 13 , comprising:

a right exhaust pipe (5a) for exhaust gases from the first engine cylinder bank and a left exhaust pipe (5b) for exhaust gases from the second engine cylinder bank;
said right and left tubes (5a, 5b) each comprising at least one gas flow and sound control valve (1a, 1b);
Said exhaust gas system comprises said left and right exhaust pipes (5a, 5b) such that the exhaust gases arriving from said right and left exhaust pipes (5a, 5b) are combined in a common exhaust gas manipulator (43). ), further comprising at least one common exhaust gas manipulator (43), such as an exhaust gas cleaning and/or muffler, connected to said first outlet (10) of said respective valve (1) of 15. An exhaust gas system (200, 300) according to clause 13 or 14 .

Said right exhaust pipe (5a) and said left exhaust pipe (5b) each have at least one bypass line (23a, 23b);
16. According to claim 15 , characterized in that said common exhaust gas manipulating device (43) is connected to at least one exhaust line (44a, 44b) leading to at least one of said bypass lines. exhaust gas system (200, 300).

Said at least one gas flow and sound control valve (1) is arranged in a dead-end side pipe (5') and is connected at its inlet to the main pipe (55) and at each of its outlets (10, 20) connected to at least one respective acoustic element (45, 47) designed as a dead end for redirecting the exhaust gases to and into the gas flow and sound control valves ;
Each of said dead end acoustic elements (45, 47) is adapted to reversing exhaust gas flow from said dead end acoustic elements (45, 47) through said at least one gas flow control valve (1) to 14. The exhaust gas system (400) of claim 13 , capable of being opened exclusively to the atmosphere via (55).