Filter muffler for an exhaust gas turbocharger of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-11549471-B2
Application number	US-201916961284-A
Country	US
Kind code	B2
Filing date	Jan 4, 2019
Priority date	Jan 10, 2018
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A filter muffler includes a front element, a rear element, and a plurality of damping elements arranged between the front element and the rear element, where the damping elements are arranged radially around a central axis of the filter muffler such that a flow channel is formed between adjacent damping elements, where respective outflow-side ends of the damping elements have a diffuser element which has an outflow-side tapering, and where an angle α between two opposite sides of the diffuser element is selected from a range of 1°≤α≤8°.

First claim

The invention claimed is:

1. A filter muffler arranged on an intake side of a compressor of an exhaust gas turbocharger for an internal combustion engine, the filter muffler comprising:
a front element,
a rear element, and
a plurality of damping elements arranged between the front element and the rear element,
wherein the damping elements are arranged radially around a central axis of the filter muffler such that a flow channel is formed between adjacent damping elements, wherein respective outflow-side ends of the damping elements have a diffuser element which has an outflow-side tapering toward the central axis, wherein the outflow-side tapering is continuous and meets to form the outflow-side ends, and wherein an angle α between two opposite sides of the diffuser element is selected from a range of 1°≤α≤8°.

2. The filter muffler of claim 1 , wherein the flow channel has an increasing flow cross-section on the outflow side.

3. The filter muffler of claim 1 , wherein the flow channel is delimited by respective involute contours of adjacent damping elements over at least 40% of the flow channel length.

4. The filter muffler of claim 3 , wherein the respective involute contours of the damping elements are formed between a radially outer inflow-side end and a radially inner outflow-side end of the damping elements.

5. The filter muffler of claim 4 , wherein the respective inflow-side ends of the damping elements, in relation to the respective involute contours, have a rear curvature in the circumferential direction.

6. The filter muffler of claim 1 , wherein the tapering runs toward an outflow edge of the diffuser element and leads at the outflow edge to a reduction in thickness of the damping element of at least 50%.

7. The filter muffler of claim 1 , wherein the damping elements are configured such that a cross-section of an inflow region of the respective flow channels between adjacent damping elements becomes smaller in the direction of flow.

8. The filter muffler of claim 1 , wherein the damping elements are configured such that a cross-section of the respective flow channels in a region which is delimited by involute contours of adjacent damping elements is constant in the direction of flow.

9. The filter muffler of claim 1 , wherein the damping elements are configured such that a cross-section of an outflow region of the respective flow channels between adjacent damping elements becomes larger in the direction of flow.

10. The filter muffler of claim 1 , wherein the flow channel is delimited by respective involute contours of adjacent damping elements over at least 50% of the flow channel length.

11. The filter muffler of claim 3 , wherein a distance D between the respective involute contours of adjacent damping elements is selected from a range of 2 mm≤D≤30 mm.

12. The filter muffler of claim 1 , wherein the respective damping elements have a first involute contour and a second involute contour parallel to the first involute contour, and wherein a distance T between the first involute contour and the second involute contour is selected from a range of 6 mm≤T≤50 mm.

13. The filter muffler of claim 1 , wherein respective inflow-side ends of the damping elements have a rear curvature in the circumferential direction.

14. The filter muffler of claim 1 , wherein the tapering runs toward an outflow edge of the diffuser element and leads at the outflow edge to a reduction in thickness of the damping element of at least 20%.

15. The filter muffler of claim 14 , wherein the damping elements are configured such that a cross-section of an outflow region of the respective flow channels between adjacent damping elements becomes larger in the direction of flow.

16. The filter muffler of claim 6 , wherein the damping elements are configured such that a cross-section of an outflow region of the respective flow channels between adjacent damping elements becomes larger in the direction of flow.

17. The filter muffler of claim 1 , wherein the flow channel is delimited by respective involute contours of adjacent damping elements over at least 65% of the flow channel length.

18. The filter muffler of claim 3 , wherein a distance D between the respective involute contours of adjacent damping elements is selected from a range of 5 mm≤D≤25 mm.

19. An exhaust gas turbocharger for an internal combustion engine, the gas turbocharger comprising:
a compressor having an intake side, and
a filter muffler arranged on the intake side of the compressor, the filter muffler comprising a front element, a rear element, and a plurality of damping elements arranged between the front element and the rear element, wherein the damping elements are arranged radially around a central axis of the filter muffler such that a flow channel is formed between adjacent damping elements, wherein respective outflow-side ends of the damping elements have a diffuser element which has an outflow-side tapering toward the central axis, wherein the outflow-side tapering is continuous and meets to form the outflow-side ends, and wherein an angle α between two opposite sides of the diffuser element is selected from a range of 1°≤α≤8°.

20. An internal combustion engine comprising:
an exhaust gas turbocharger comprising:
a compressor having an intake side, and
a filter muffler arranged on the intake side of the compressor, the filter muffler comprising a front element, a rear element, and a plurality of damping elements arranged between the front element and the rear element, wherein the damping elements are arranged radially around a central axis of the filter muffler such that a flow channel is formed between adjacent damping elements, wherein respective outflow-side ends of the damping elements have a diffuser element which has an outflow-side tapering toward the central axis, wherein the outflow-side tapering is continuous and meets to form the outflow-side ends, and wherein an angle α between two opposite sides of the diffuser element is selected from a range of 1°≤α≤8°.

Assignees

• Abb Schweiz Ag

Inventors

• Feld Heinz-Jürgen
• Joho Marcel

Classifications

• F04D29/664

  by means of sound absorbing material · CPC title

• F02B37/00

  Engines characterised by provision of pumps driven at least for part of the time by exhaust · CPC title

• F02M35/1205

  Flow throttling or guiding · CPC title

• F02M35/1211 Primary

  by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides (F02M35/1244 takes precedence) · CPC title

• F02M35/02483 Primary

  Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements · CPC title