EXHAUST GAS RECIRCULATION LINE EMBODIED TO BE PARTIALLY FLEXIBLE

Abstract

The invention relates to an exhaust gas circulation line (1), in which exhaust gas and new intake air are mixed through a pipe section (2).

It is thereby essential for the invention that the exhaust gas circulation line (1) is embodied to be at least partially flexible and that, on the one end, the exhaust gas recirculation line (1) has a closure (4) on the front side, wherein, in the area of the closure (4) on the front side, the exhaust gas circulation line (1) has at least two openings (6) on the jacket side.

Claims

1. An exhaust gas recirculation line (1), characterized in that the exhaust gas recirculation line (1) is embodied to be at least partially flexible, that, on one end, the exhaust gas recirculation line (1) has a pipe section (2), which is closed on the front side, comprising at least two openings (6) on the jacket side.

2. The exhaust gas circulation line according to claim 1, characterized in that the exhaust gas circulation line (1) has a flange (9) for connection to an exhaust gas recirculation cooler (12).

3. The exhaust gas circulation line according to claim 2, characterized in that a flexible bellows section (3) is arranged between the pipe section (2) and the flange (9).

4. The exhaust gas circulation line according to claim 3, characterized in that at least the pipe section (2) and the bellows section (3) are embodied in one piece.

5. The exhaust gas circulation line according to one of the preceding claims, characterized in that the closure (4) on the front side of the pipe section (2) is embodied as cover (5).

6. The exhaust gas circulation line according to one of the preceding claims, characterized in that the at least two openings (6) on the jacket side are arranged so as to be located opposite one another, and/or that the at least two openings (6) on the jacket side are embodied as elongated holes (7), which extend in the circumferential direction.

7. The exhaust gas circulation line according to one of the preceding claims, characterized in that a fastening console (8), which engages around the pipe section (2), is arranged on the pipe section (2).

8. The exhaust gas circulation line according to claim 7, characterized in that the pipe section (2) is rotatably arranged in the fastening console (8).

9. An exhaust gas circulation cooler (12) comprising an exhaust gas circulation line (1) according to one of the preceding claims, arranged thereon.

10. An internal combustion engine (10) comprising an exhaust gas recirculation cooler (12) according to claim 9 and comprising an intake tract (11) comprising an intake line (13), wherein the exhaust gas circulation line (1) is inserted with its pipe section (2) into the intake line (13) and is fastened thereto via a fastening console (8).

11. The internal combustion engine (10) according to claim 10, characterized in that the at least two openings (6) on the jacket side are arranged in the intake line (13) so as to be aligned in the flow direction.

Description

[0019] A preferred exemplary embodiment of the invention is illustrated in the drawing and will be described in more detail in the description below.

[0020] The sole FIG. 1 thereby shows a schematic illustration of an exhaust gas recirculation line according to the invention, wherein the exhaust gas recirculation line according to the invention is connected to an exhaust gas recirculation cooler and the intake tract of an internal combustion engine.

[0021] According to FIG. 1, an exhaust gas recirculation line 1 has a pipe section 2 and a flexible bellows section 3. The pipe section 2 and the bellows section 3 thereby preferably form a one-part or one-piece component. The pipe section 2 has a closure 4 on the front side, which is arranged on the free end of the pipe section 2, wherein the closure 4 on the front side is embodied as cover 5. The pipe section 2 further has openings 6 on the jacket side, which are embodied as elongated holes 7 and which extend around the pipe section 2 in the circumferential direction.

[0022] It is important to emphasize thereby that the pipe section 2 is fastened to an intake tract of an internal combustion engine 10 via a fastening console 8 in the example of FIG. 1, wherein the fastening console 8 is arranged on the end of the pipe section 2, which transitions into the bellows section 3. As a result of the bellows section 3, which connects to the pipe section 2, the exhaust gas recirculation line 1 is embodied to be partially flexible.

[0023] As illustrated in FIG. 1, the fastening console 8 is arranged on the one end of the bellows section 3, and a flange 9 is arranged on the other end of the bellows section 3. As a result of the flexibly embodied bellows section 3, the pipe section 2 can be positioned at a variable angle to the flange 9. It is thus theoretically possible that the flange 9 and the pipe section 2, which is fastened by means of the fastening console 8, are located opposite one another so as to be aligned or that the bellows section 3 and the pipe section 2 form a straight line, respectively. In FIG. 1, the bellows section 3 is curved by approx. 90 between the flange 9 and the pipe section 2, which is fastened by means of the fastening console 8. The exhaust gas recirculation line 1 is fastened to an exhaust gas recirculation cooler 12 by means of the flange 9. The exhaust gas recirculation cooler 12 and the exhaust gas recirculation line 1 can thereby form a prefabricated assembly.

[0024] The pipe section 2, which connects to the bellows section 3, thereby protrudes with its closure 4 on the front side and the openings 6 on the jacket side into an intake tract 11 of the internal combustion engine 10. An intake line 13 is located in the intake tract 11.

[0025] An exhaust gas recirculation line 1, which is embodied to be at least partially flexible and which, on one end, has a pipe section 2, which is closed on the front side, and at least two openings on the jacket side, can be provided with the present invention. The end of the pipe section 2, which is closed on the front side, thereby serves as deflector/mixing arrangement for mixing circulated and cooled exhaust gas and new intake air. The exhaust gas recirculation line 1 is thereby embodied to be partially flexible, whereby it is made simpler to connect the latter to the exhaust gas circulation cooler 12 and to the intake line 13 of the internal combustion engine 10, namely independently of the constellation, in which the internal combustion engine 10 and the exhaust gas recirculation cooler 12 are arranged relative to one another. Not only a simplified assembly, but also a prefabrication of an assembly consisting of mixing arrangement and exhaust gas recirculation line 1 can be attained by means of the exhaust gas recirculation line 1 according to the invention. Production tolerances can also be compensated more easily by means of the flexible exhaust gas recirculation line 1 according to the invention.