Exhaust system of a combustion engine

• US 20040226291A1
• Filed: 03/03/2004
• Published: 11/18/2004
• Est. Priority Date: 03/10/2003
• Status: Active Grant

• Current Assignee: Friedrich Boysen GmbH & Company KG (Friedrich und Elisabeth Boysen-Stiftung)
• Original Assignee: Friedrich Boysen GmbH & Company KG (Friedrich und Elisabeth Boysen-Stiftung)
• Inventors: Diez, Painer, Buhler, Frank
• Granted Patent: US 7,578,124 B2
• Time in Patent Office: Days
• US Class Current: 60/323
• CPC Class Codes: F01N 13/008 Mounting or arrangement of exhaust sensors in or on exhaust apparatus sensor arrangements for engine control F02D41/1439
• CPC Class Codes: F01N 13/011 having two or more purifying devices arranged in parallel
• CPC Class Codes: F01N 13/08 Other arrangements or adaptations of exhaust conduits pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005
• CPC Class Codes: F01N 13/10 of exhaust manifolds with cooling jacket F01N3/046
• CPC Class Codes: F01N 13/14 having thermal insulation exhaust manifolds F01N13/102
• CPC Class Codes: F01N 13/1883 manufactured by hydroforming
• CPC Class Codes: F01N 2470/10 Tubes having non-circular cross section
• CPC Class Codes: F01N 3/2882 Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices combined with absorbents or adsorbents only F01N3/0814; combined with particulate filters F01N3/035
• CPC Class Codes: F01N 3/2892 Exhaust flow directors or the like, e.g. upstream of catalytic device

Abstract

An exhaust system of a combustion engine comprises at least one exhaust manifold with a plurality of inlet pipes for connection to exhaust ports of the combustion engine. The system comprises a collector device with a one-piece housing having at least two apertures for connecting the inlet pipes and one outlet opening connected to subsequent elements of the exhaust system, in particular to a catalyst converter housing.

Claims

1. An exhaust system of a combustion engine comprising at least one exhaust manifold (1, 1′

) with a plurality of inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) for connection to exhaust ports of the combustion engine and comprising a collector device (9, 9′

) for the merging of the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) which has one outlet opening (20a) which is connected to subsequent elements of the exhaust system, in particular to a catalytic converter housing (3, 3′

), characterized in that

the collector device (9, 9′

) is made as a one-piece collector housing of a material stiff in bending.

2. An exhaust system in accordance with claim 1, characterized in that the collector housing (9, 9′

) has at least two apertures, in particular three apertures, for the connection of inlet pipes (6, 6′

. 7, 7′

, 8, 8′

) and has one outlet opening (20a).

3. An exhaust system in accordance with claim 1, characterized in that the collector housing (9, 9′

) has an aperture (15) for the insertion of a lambda probe (16, 16′

).

4. An exhaust system in accordance with claim 1, characterized in that an outlet pipe (20) is connected to the outlet opening (20a).

5. An exhaust system in accordance with claim 4, characterized in that the outlet pipe (20) is made as a catalytic converter inflow pipe.

6. An exhaust system in accordance with claim 5, characterized in that the catalytic converter inflow pipe (20) is guided up to just before the catalytic converter;

and in that the catalytic converter housing (3, 3′

) is connected directly to the collector housing (9, 9′

) via a pipe (3a, 3a′

), in particular a funnel-shaped pipe, surrounding the catalytic converter inflow pipe (20).

7. An exhaust system in accordance with claim 1, characterized in that the apertures in the collector housing (9, 9′

) are at least partly stamped out apertures.

8. Exhaust systems in accordance with claim 1, characterized in that the collector housing (9, 9′

) is manufactured by internal high pressure shaping.

9. An exhaust system in accordance with claim 1, characterized in that the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) open into the collector housing (9, 9′

) such that the exhaust flow directions (I, II, III) of all exhaust flows merge at a collection point (14).

10. An exhaust system in accordance with claim 1, characterized in that a lambda probe (16) is arranged in the collector housing (9, 9′

) such that the probe tip (17) is located at the collection point (14).

11. An exhaust system in accordance with claim 1, characterized in that the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) open into the collector housing (9, 9′

) such that the exhaust flow directions (I, II, III) are each inclined with respect to a plane (V) extending perpendicular to the exhaust flow direction (VI) in the outlet opening (20a), and indeed such that the exhaust flow directions (I, II, III) of the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) point to the same side of this plane (V) as the exhaust flow direction (VI) in the outlet pipe (21).

12. An exhaust system in accordance with claim 1, characterized in that the lambda probe (16) is arranged at the side of the collector housing (9, 9′

) remote from the outlet opening (20a).

13. An exhaust system in accordance with claim 1, characterized in that the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) open into the collector housing (9, 9′

) such that the collection point (14) is located in the interior (13) of the collector housing (9′

).

14. An exhaust system in accordance with claim 1, characterized in that the collector housing (9, 9′

) has molded connection stubs (10, 11, 12, 20) for the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) and/or for the outlet pipe (21).

15. An exhaust system in accordance with claim 1, characterized in that the collector housing (9, 9′

) is at least partly made in mirror symmetry with respect to a plane (IV) which extends perpendicular to the connection line of the exhaust ports of the combustion engine.

16. An exhaust system in accordance with claim 15, characterized in that, the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) and/or the lambda probe (16, 16′

) are also arranged in mirror symmetry with respect to this plane (IV).

17. An exhaust system in accordance with claim 1, characterized in that the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) are comparatively flexible;

in particular in that they have an oval cross-section at least section-wise.

18. An exhaust system in accordance with claim 1, characterized in that the inlet pipes (6, 6′

, 7, 7′

, 8, 8′

) are manufactured by internal high pressure shaping.