Exhaust system
The present invention relates to an exhaust system for an internal combustion engine, more preferably of a motor vehicle, with an exhaust gas turbine, with an exhaust pipe, whose inlet is fluidically connected with an outlet of the exhaust gas turbine, with a flange connection for connecting the exhaust gas turbine with the exhaust pipe which comprises a flange fastened to the exhaust pipe and attached to the exhaust gas turbine, and with a shielding apron which is so arranged and/or incorporated in the flange connection that in the operation of the exhaust system it protects a transition region between the flange and the exhaust pipe from direct admission of exhaust gas.
1. An exhaust system for an internal combustion engine, comprising:
an exhaust gas turbine,
an exhaust pipe, whose inlet is fluidically connected with an outlet of the exhaust gas turbine,
a flange connection for connecting the exhaust gas turbine with the exhaust pipe having a flange fastened to the exhaust pipe and attached to the exhaust gas turbine,
a shielding apron which is arranged and so incorporated in the flange connection that in operation of the exhaust system the shielding apron protects a transition region between the flange and the exhaust pipe against direct admission of exhaust gas
wherein the shielding apron overlaps the transition region.
2. The exhaust system according to claim 1 , wherein the shielding apron is
designed on and integrally moulded on a shielding component and, which with respect to the exhaust pipe and with respect to the exhaust gas turbine forms a separate component.
3. The exhaust system according to claim 2 , wherein the shielding component is
embodied as a flange seal or at least comprises such, which is installed in the flange connection axially between the flange and a flange contour of the exhaust gas turbine complementary thereto.
4. The exhaust system according to claim 1 , wherein the shielding apron is so arranged that the shielding apron overlaps the transition region on a side facing the exhaust gas.
5. The exhaust system according to claim 1 , wherein the shielding apron is so arranged that the shielding apron axially dips into the exhaust pipe.
6. The exhaust system according to claim 1 , wherein the shielding apron
extends in circumferential direction only along a part circumference of the exhaust pipe.
7. The exhaust system according to claim 6 , wherein the shielding apron in circumferential direction only extends along a part circumference of the exhaust pipe from at least 90° and maximally 270°.
8. The exhaust system according to claim 1 , wherein the shielding apron extends
in circumferential direction along the total circumference of the exhaust pipe.
9. The exhaust system according to claim 8 , wherein the gap is embodied as closed
circumferential ring gap.
10. The exhaust system according to claim 1 , wherein the shielding apron is so arranged that between the shielding apron and the exhaust pipe a gap is formed.
11. The exhaust system according to claim 10 , wherein the gap is axially open on one side, more specifically on the trailing end side.
12. The exhaust system according claim 1 , wherein the shielding apron relatively to the exhaust pipe is arranged without contact on a side of the exhaust pipe facing the exhaust gas.
13. The exhaust system according to claim 1 , wherein the shielding apron is attached to the flange.
14. The exhaust system according to claim 1 , wherein the shielding apron is installed in the connection between the flange and the exhaust gas turbine.
15. The exhaust system according to claim 1 , wherein the shielding apron is incorporated in the attachment between the flange and the exhaust pipe.
16. The exhaust system according to claim 1 , wherein a wall thickness of the shielding apron is smaller than a wall thickness of the exhaust pipe, wherein the wall thickness of the shielding apron is a maximum of half the size of the wall thickness of the exhaust pipe.
17. The exhaust system according to claim 1 , wherein the shielding apron is embodied as formed sheet metal part.
18. The exhaust system according to claim 1 , wherein the shielding apron consists of a material whose thermal stability is greater than that of the material of at least one of the exhaust pipe, the flange, or the exhaust gas turbine.
19. An exhaust system for an internal combustion engine, comprising:
an exhaust gas turbine,
an exhaust pipe, whose inlet is fluidically connected with an outlet of the exhaust gas turbine,
a flange connection for connecting the exhaust gas turbine with the exhaust pipe having a flange fastened to the exhaust pipe and attached to the exhaust gas turbine,
a shielding apron which is arranged and so incorporated in the flange connection that in operation of the exhaust system the shielding apron protects a transition region between the flange and the exhaust pipe against direct admission of exhaust gas;
wherein the shielding apron
extends in circumferential direction only along a part circumference of the exhaust pipe; and
wherein the exhaust turbine
comprises a wastegate valve, wherein the shielding apron only extends along a part circumference of the exhaust pipe in circumferential direction which in operation of the exhaust system is exposed to an exhaust gas onflow which develops with opened wastegate valve.