Exhaust arrangement for a vehicle exhaust line

1. An exhaust arrangement for an exhaust line having an exhaust gas treatment device and a liquid injection device located upstream of the exhaust gas treatment device comprising:

a single moving element incorporating a throttling member having a closing surface and, operatively connected to the throttling member, a turbulence generating member and

an actuator for controlling a position of the moving element between a first position wherein the moving element is in a retracted position and creates a minimum backpressure in the exhaust line and a second position wherein the moving element is in an extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the moving element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within a flow of exhaust gases through the exhaust line,

wherein the turbulence generating member extends from the throttling member and is provided with a plurality of openings through which the exhaust gases flow.

2. The exhaust arrangement according to claim 1 , wherein the moving element is transversally mobile with respect to the exhaust line and is capable of displacement between a first extreme position wherein the moving element is in a fully retracted position and creates a minimum backpressure in the exhaust line and a second extreme position wherein the moving member is in a fully extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the moving element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within the flow of exhaust gas.

3. An exhaust arrangement for an exhaust line having an exhaust gas treatment device and a liquid injection device located upstream of the exhaust gas treatment device comprising:

a single moving element incorporating a throttling member having a closing surface and, operatively connected to the throttling member, a turbulence generating member and

an actuator for controlling a position of the moving element between a first position wherein the moving element is in a retracted position and creates a minimum backpressure in the exhaust line and a second position wherein the moving element is in an extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the moving element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within a flow of exhaust gases through the exhaust line,

wherein the turbulence generating member extends from the throttling member and has a surface area at least equal to a cross-sectional area of the exhaust line.

4. An exhaust arrangement for an exhaust line having an exhaust gas treatment device and a liquid injection device located upstream of the exhaust gas treatment device comprising:

a single moving element incorporating a throttling member having a closing surface and, operatively connected to the throttling member, a turbulence generating member and

an actuator for controlling a position of the moving element between a first position wherein the moving element is in a retracted position and creates a minimum backpressure in the exhaust line and a second position wherein the moving element is in an extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the moving element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within the flow of exhaust gases,

wherein the moving element is transversally mobile with respect to the exhaust line and is capable of displacement between a first extreme position wherein the moving element is in a fully retracted position and creates a minimum backpressure in the exhaust line and a second extreme position wherein the moving member is in a fully extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the moving element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within a flow of exhaust gases through the exhaust line, and the turbulence generating member comprises an array of strips or blades defining at least one opening.

5. The exhaust arrangement according to claim 4 , wherein the array of strips or blades comprises two sets of perpendicular strips or blades.

6. The exhaust arrangement according to claim 4 , wherein at least one of the strips or blades is provided with a spoiler on the downstream side of the turbulence generating member.

7. The exhaust arrangement according to claim 1 , wherein the exhaust line is provided with a housing that accommodates the turbulence generating member when the moving element is in the second position.

8. The exhaust arrangement according to claim 1 , wherein the throttling member has a surface area at least equal to a cross-sectional area of the exhaust line.

9. The exhaust arrangement according to claim 1 , wherein the moving element is axially mobile within the exhaust gas flow path, is capable of displacement between a first extreme position wherein the moving element is in a fully retracted position and creates a minimum backpressure in the exhaust line and a second extreme position wherein the moving member is in a fully extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the mobile element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within the flow of exhaust gases.

10. The exhaust arrangement according to claim 9 , wherein the moving element comprises a throttling element the surface of which equals the section of the exhaust valve and a turbulence generating member having at least one protruding member extending from the throttling element.

11. An exhaust arrangement for an exhaust line having an exhaust gas treatment device and a liquid injection device located upstream of the exhaust gas treatment device comprising:

a single moving element incorporating a throttling member having a closing surface and, operatively connected to the throttling member, a turbulence generating member and

an actuator for controlling a position of the moving element between a first position wherein the moving element is in a retracted position and creates a minimum backpressure in the exhaust line and a second position wherein the moving element is in an extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the moving element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within a flow of exhaust gases through the exhaust line,

wherein the moving element is axially mobile within the exhaust gas flow path, is capable of displacement between a first extreme position wherein the moving element is in a fully retracted position and creates a minimum backpressure in the exhaust line and a second extreme position wherein the moving member is in a fully extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the mobile element is in a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within the flow of exhaust gases, the moving element is axially mobile within the exhaust gas flow path, is capable of displacement between a first extreme position wherein the moving element is in a fully retracted position and creates a minimum backpressure in the exhaust line and a second extreme position wherein the moving member is in a fully extended position and creates a maximum back pressure, or selectively in at least one intermediate position wherein the mobile element is a turbulence generating position wherein the turbulence generating member intrudes at least partially into the exhaust line and creates turbulences within the flow of exhaust gases, and the turbulence generating member comprises an array of strips or blades.

12. The exhaust arrangement according to claim 11 , wherein at least one the strip is provided with a spoiler.

13. The exhaust arrangement according to claim 9 , wherein the exhaust line is provided with a wall that surrounds the moving element when the moving element is in a fully retracted position.

14. An internal combustion engine, wherein the engine includes an exhaust arrangement as claimed in claim 1 .

15. The exhaust arrangement according to claim 3 , wherein the turbulence generating member extends from the throttling member transversely relative to a direction of a centerline of the exhaust line.

16. The exhaust arrangement according to claim 3 , wherein the turbulence generating member extends from the throttling member in a direction coinciding with a direction of a centerline of the exhaust line.

17. The exhaust arrangement according to claim 1 , wherein the turbulence generating member comprises an array of strips defining the plurality of openings.

18. The exhaust arrangement according to claim 17 , wherein at least one of the strips or blades is provided with a spoiler on the downstream side of the turbulence generating member.

19. The exhaust arrangement according to claim 1 , wherein the exhaust gas treatment device is a SCR catalytic converter, the liquid injection device comprises a reductant injection arrangement, and the turbulence generating member is arranged to homogeneously mix the reductant with the flow of exhaust gases.