Internal combustion engine

Abstract

To provide an internal combustion engine having efficient exhaust gas control with a high conversion speed, requiring a small installation space, having a small mass, and having a low vibration load in a region of an exhaust gas control device.SOLUTION: The exhaust gas discharged from the exhaust gas outlet 25 of each cylinder 11 is supplied to the exhaust gas manifold 17, and the exhaust gas discharged from the exhaust gas manifold 17 is guided to the exhaust gas supply pipe 18, guided in the direction of the exhaust gas control element, guided to the exhaust gas discharge pipe 19, and guided in the direction of the exhaust gas turbocharger in a first switching state, and the exhaust gas discharged from the exhaust gas manifold 17 is directly guided in the direction of the exhaust gas turbocharger by bypassing the exhaust gas control element in a second switching state. The pipe comprises a plurality of pipe sections, between which compensators for compensating for thermal expansion are arranged, wherein the compensators for compensating for thermal expansion and for vibration compensation can be guided such that the exhaust gas can interact with the exhaust gas control element.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an internal combustion engine. [Background technology]

[0002] The invention is particularly concerned with the field of so-called large engines or large internal combustion engines, whose cylinders have a piston diameter of at least 140 mm, in particular at least 175 mm. Examples of such large internal combustion engines include marine engines.

[0003] Patent Document 1 discloses an internal combustion engine having an exhaust gas aftertreatment system with an exhaust supercharging system. The exhaust gas supercharging system preferably includes a high-pressure exhaust turbocharger and a low-pressure exhaust turbocharger, in which thermal energy of the exhaust gas is converted into mechanical energy to compress the charge air supplied to the internal combustion engine. The exhaust gas aftertreatment system further includes an SCR exhaust gas control system provided to purify the exhaust gas of the internal combustion engine. Preferably, the SCR exhaust gas control system is connected between the high-pressure turbine of the high-pressure exhaust turbocharger and the low-pressure turbine of the low-pressure exhaust turbocharger. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] German Patent Application Publication No. 102016205327 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a need for an internal combustion engine with efficient exhaust gas control with a high conversion rate, requiring little installation space, a low mass and therefore a low heat storage capacity, and low vibration loads in the area of ​​the exhaust gas control device. [Means for solving the problem]

[0006] Starting from this, the object of the present invention is to create a new type of internal combustion engine. This object is achieved by an internal combustion engine as claimed in claim 1.

[0007] The internal combustion engine according to the invention comprises a plurality of cylinders arranged for the combustion of fuel, in the process generating exhaust gases, said cylinders forming at least one group of cylinders arranged in series, and an exhaust gas aftertreatment system including an exhaust gas control device arranged to purify the exhaust gases of the cylinders, and at least one exhaust gas turbocharger arranged to expand the exhaust gases of the cylinders and extract energy in the process.

[0008] The exhaust gas control device for an internal combustion engine according to the present invention comprises a plurality of exhaust gas control elements, each of which comprises at least one catalytic converter element arranged in a can body that functions as a pressure vessel, the wall thickness of the can body being designed to accommodate exhaust gas pressures of up to 4 bar, or up to 5 bar, or up to 6 bar.

[0009] The exhaust gas control device for an internal combustion engine according to the present invention further includes an exhaust manifold extending along at least one group of cylinders, an exhaust gas supply pipe extending along at least one group of cylinders, and at least one exhaust gas discharge pipe extending along at least one group of cylinders, and is capable of directing exhaust gases via these. Specifically, exhaust gases from each cylinder discharged from its exhaust gas outlet are supplied to the exhaust manifold, and depending on the switching state of the switching device, in a first switching state of the switching device, the exhaust gases are discharged from the exhaust manifold and directed into the exhaust gas supply pipe, flow via the exhaust gas supply pipe toward the exhaust gas control element, pass through the exhaust gas control element, and are then directed to the exhaust gas discharge pipe and via the exhaust gas discharge pipe toward at least one exhaust turbocharger. In a second switching state of the switching device, the exhaust gases bypass the exhaust gas control element, and are directed directly toward at least one exhaust turbocharger.

[0010] In the exhaust gas control device for an internal combustion engine according to the present invention, the exhaust manifold, the exhaust gas supply pipe, and the exhaust gas discharge pipe each include a plurality of pipe sections, and compensators are disposed between the pipe sections to compensate for thermal expansion.

[0011] Furthermore, the compensators for thermal expansion compensation and vibration compensation interact with the exhaust gas control elements of the exhaust gas control device for an internal combustion engine according to the invention.

[0012] The internal combustion engine according to the present invention enables efficient exhaust gas control with a high conversion rate, small installation space requirements, low mass, and therefore low heat storage capacity, as well as low vibration loads in the area of ​​the exhaust gas control device. Exhaust gases having high temperature and pressure levels flow upstream of at least one exhaust gas turbocharger through exhaust gas control elements attached in the area of ​​the exhaust manifolds extending along each cylinder bank, directly adjacent to the cylinders of the internal combustion engine, through exhaust gas supply pipes extending along each cylinder bank and exhaust gas discharge pipes extending along each cylinder bank. The exhaust gas control element can body, designed for exhaust gas pressures of up to 4, 5, 6, or 10 bar, directly functions as a pressure vessel, eliminating the need for a separate pressure vessel to accommodate the exhaust gas control element. This is important for reducing mass and heat storage capacity in the area of ​​the exhaust gas control device and ensuring favorable transient operating behavior of the internal combustion engine. A compensator can compensate for thermal expansion and mechanical vibrations in the area of ​​the exhaust gas control device. Finally, the combination of the above features allows for efficient exhaust gas control with a high conversion rate, small installation space requirements, low mass and therefore low heat storage capacity, and low vibration loads in the area of ​​the exhaust gas control device.

[0013] Preferably, exhaust gases flow through the exhaust control element, i.e., the catalytic converter element, in a direction perpendicular to the flow direction of the exhaust manifold, the exhaust gas supply pipe, and the exhaust gas discharge pipe. This allows the exhaust control element to be located between the exhaust gas supply pipe and the exhaust gas discharge pipe while requiring little installation space. This also allows for flow through the catalytic converter element at high temperature and pressure levels, at a nearly constant flow rate, and with almost no pressure fluctuations. These features therefore also help to provide efficient exhaust control with high conversion rates, small installation space requirements, low mass, and low vibration loads in the area of ​​the exhaust control device.

[0014] Preferably, the can body has a wall thickness between 1.5 mm and 6 mm, preferably between 1.5 mm and 5 mm, or between 1.5 mm and 4 mm, or between 1.5 mm and 3 mm, or between 1.5 mm and 2 mm, or between 2 mm and 5 mm, or between 2 mm and 4 mm, or between 2 mm and 3 mm, or between 3 mm and 5 mm, or between 3 mm and 4 mm. These can body wall thicknesses are preferred so that can bodies with exhaust gas pressures up to 4 bar, or up to 5 bar, or up to 6 bar, or up to 10 bar can function directly as a pressure vessel without the need for a separate pressure vessel. This is particularly advantageous for keeping the installation requirements, mass, and heat storage capacity in the area of ​​the emission control device low, allowing for efficient emission control and good transient operating behavior.

[0015] Preferably, a plurality of, preferably two or three, exhaust control elements are connected in series one after the other, and a plurality of such series-arranged exhaust control elements are connected in parallel with one another along at least one cylinder bank between the exhaust gas supply pipe and the exhaust gas discharge pipe, and further, baffles are arranged upstream or downstream of the exhaust control elements to regulate the flow of exhaust gas through the exhaust control elements along at least one cylinder bank, thereby ensuring efficient exhaust control while requiring little installation space.

[0016] Preferred further developments of the invention emerge from the dependent claims and the following description. Exemplary embodiments of the invention are explained in detail with reference to the drawings, in which: [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a front view of a part of an in-line internal combustion engine in the region of an exhaust gas control device for the internal combustion engine; [Figure 2] 2 is a plan view showing a part of the internal combustion engine according to FIG. 1 as seen in the direction II. FIG. [Figure 3] 1 is a front view of a part of a V-type internal combustion engine in the area of ​​an exhaust gas control device for the internal combustion engine; [Figure 4] 4 is a plan view showing a part of the internal combustion engine according to FIG. 2 as seen in the direction of IV. FIG. [Figure 5] FIG. 5 is a side view of the exhaust gas control device for the internal combustion engine according to FIGS. 3 and 4. [Figure 6] 6A to 6C are diagrams showing details of the exhaust gas control device for an internal combustion engine according to FIGS. 1, 2, 3, 4, and 5 in a plurality of modified embodiments. [Figure 7] 7 shows a further embodiment variant with respect to FIG. 6. FIG. [Figure 8] 7 shows a further embodiment variant with respect to FIG. 6. FIG. [Figure 9] 9 is a cross-sectional view taken along the line IX-IX in FIG. 6 in detail. [Figure 10] FIG. 10 shows an alternative to the detail of FIG. 9. [Figure 11] 7A-7C show alternatives to the details of FIG. 6 in several embodiment variations. [Figure 12] FIG. 12 shows a further embodiment variant with respect to FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] 1 and 2 show different views of an exemplary embodiment of an internal combustion engine 10 according to the invention, which includes a plurality of cylinders 11 arranged in series one after the other and forming a single cylinder bank 12. The internal combustion engine 10 according to FIGS. 1 and 2 is an in-line internal combustion engine. It should be noted that the cylinders 11 of the internal combustion engine 10 can also be arranged to form two cylinder banks 12, each of which has a plurality of cylinders 11 arranged in series. In this case, the cylinders 11 of the two cylinder banks 12 are arranged in a V-shape relative to each other. FIGS. 3, 4, and 5 show details of the V-type internal combustion engine 10 according to the invention. The number of cylinders 11 and the number of cylinder banks 12 are arbitrary.

[0019] The internal combustion engine 10 includes an exhaust gas aftertreatment system 13, which includes an emission control device 14 and at least one exhaust turbocharger 15. The at least one exhaust turbocharger 15 is provided to expand exhaust gases from the cylinders 11 that have been purified by the emission control device 14, thereby extracting mechanical energy that is utilized to compress the charge air supplied to the cylinders 11. Each exhaust turbocharger 15 includes a turbine 16 that expands the purified exhaust gases and a compressor (not shown) that compresses the charge air. A silencer (not shown) may be located upstream of the compressor.

[0020] The exhaust gas control device 14 of the internal combustion engine 10 includes an exhaust manifold 17 extending along at least one cylinder bank 12, an exhaust gas supply pipe 18 extending parallel to the exhaust manifold 17 along at least one cylinder bank 12, and an exhaust gas discharge pipe 19 extending parallel to the exhaust manifold 17 along at least one cylinder bank 12. The exhaust gas control device 14 further includes a plurality of exhaust gas control elements 20, each including at least one catalytic converter element 22 arranged in a can body 21. At a plurality of positions along the at least one cylinder bank 12, a series arrangement 23 of the plurality of exhaust gas control elements 20 arranged one after the other is arranged between the exhaust gas supply pipe 18 and the exhaust gas discharge pipe 19 in the illustrated exemplary embodiment, and the series arrangements 23 of the series arranged one after the other exhaust gas control elements 20 are connected in parallel to one another between the exhaust gas supply pipe 18 and the exhaust gas discharge pipe 19.

[0021] 1 and 2, the exhaust gas supply pipe 18 is connected to each of the series arrangements 23 of the plurality of exhaust gas control elements 20 via connecting bends or overflow pipes 24, thereby enabling exhaust gas to be supplied from the exhaust gas supply pipe 18 to the exhaust gas control elements 20, i.e., the series arrangements 23 of the plurality of exhaust gas control elements 20 connected in parallel with one another. Furthermore, each of the series arrangements 23 of the plurality of exhaust gas control elements 20 is connected to the exhaust gas discharge pipe 19 via connecting bends or overflow pipes 24, thereby enabling exhaust gas from each of the series arrangements 23 of the plurality of exhaust gas control elements 20 to overflow into the exhaust gas discharge pipe 19.

[0022] Exhaust gas flows through the exhaust manifold 17, the exhaust gas supply pipe 18, and the exhaust gas discharge pipe 19. Specifically, first, the exhaust gas discharged from each cylinder 11 through the exhaust gas outlet 25 of each cylinder 11 flows into the exhaust manifold 17. In the first switching state of the switching device 47 according to FIG. 5 shown in the exemplary embodiment of FIGS. 1 to 5, the exhaust gas discharged from the exhaust manifold 17 flows into the exhaust gas supply pipe 18 and flows through the exhaust gas supply pipe 18 and, in FIGS. 1 and 2, through the overflow pipe 24 in the direction of the exhaust gas control elements 20 of the series arrangement 23. The exhaust gas that has passed through the exhaust gas control elements 20 of the series arrangement 23 is led to the exhaust gas discharge pipe 19 and flows through the exhaust gas discharge pipe 19 in the direction of at least one exhaust gas turbocharger 15, i.e., its turbine 16. In the second switching state of the switching device 47, the exhaust gases leaving the exhaust manifold 17 can be directed directly towards at least one exhaust gas turbocharger, bypassing the exhaust gas control element 20.

[0023] The exhaust manifold 17 , the exhaust gas supply pipe 18 , the exhaust gas discharge pipe 19 and the exhaust gas control elements 20 are located in the immediate vicinity of the cylinders 11 of the internal combustion engine 10 .

[0024] As already explained, in the illustrated exemplary embodiment, the emission control elements 20 grouped into the parallel-connected series arrangement 23 of a plurality of series-connected emission control elements 20 each include a can body 21, which, according to the present invention, is designed for exhaust gas pressures of up to 4 bar, or up to 5 bar, or up to 6 bar, or up to 10 bar, so that each can body 21 functions directly as a pressure vessel for an emission control element 20, making it possible to omit a separate pressure vessel. To this end, the can body 21 preferably has a wall thickness of between 1.5 mm and 6 mm, or between 1.5 mm and 5 mm, or between 1.5 mm and 4 mm, or between 1.5 mm and 3 mm, or between 1.5 mm and 2 mm, or between 2 mm and 6 mm, or between 2 mm and 5 mm, or between 2 mm and 4 mm, or between 2 mm and 3 mm, or between 3 mm and 6 mm, or between 3 mm and 5 mm, or between 3 mm and 4 mm, or between 4 mm and 5 mm. This eliminates the need for a separate pressure vessel, which requires a lot of installation space and is therefore heavy and has a high heat storage capacity.This in turn improves the transient operating behavior of the internal combustion engine, particularly when the internal combustion engine is being switched between different operating states, and the control of exhaust emissions during transient operating behavior.

[0025] The exhaust manifold 17, the exhaust gas supply pipe 18, and the exhaust gas discharge pipe 19 each include multiple pipe sections 17a, 18a, and 19a, with compensators 26 disposed between them to compensate for thermal expansion. A compensator 27 for compensating for thermal expansion is also connected between the exhaust gas outlet 25 of each cylinder 11 and the exhaust manifold 17. At least one compensator 28 is also used in each series arrangement 23 in which exhaust gas control elements 20 are connected in series. In FIG. 6 , which is representative of several different embodiment variants, a compensator 28 is disposed at each end of the series-arranged exhaust gas control elements 20, and the compensators 28 are used to compensate for thermal expansion and mechanical vibrations. The compensator 28 may be present only at one end of such a series arrangement 23, i.e., at the inlet end or the outlet end of each series arrangement 23.

[0026] As shown in Figure 6, the exhaust gas control elements 20 in the series arrangement 23 are surrounded by thermal insulator 29. The thermal insulator 29 is formed from half shells 29a, as shown in Figures 9 and 10, which are securely engaged with each other at their adjacent ends and connected to each other via a clamp closure 30 in Figure 9.

[0027] The upper half of Fig. 6 shows an embodiment of the compensators 28, which are formed integrally as components of the can body 21. The compensators 28 in the upper half of Fig. 6 are therefore configured as an integral extension of the respective can body 21 and act on the adjacent exhaust gas guide assembly via a flange connection 31. This adjacent exhaust gas guide assembly may be part of the overflow pipe 24. In the upper half of Fig. 6, a flange 32 of each compensator 28 abuts on a flange 33 of the overflow pipe 24, and according to Fig. 6, these flanges 32, 33 are connected via a V- or U-shaped band clamp 34.

[0028] 6, on the left side, the compensator 28 is shown, which is designed as a separate assembly and is connected via flange connections 31 between the compensator 28 and the can body 21 of the adjacent emission control element 20 on the one hand, and between the compensator 28 and the adjacent part of the overflow pipe 24 on the other hand. Such a separate compensator 28 can be reused if the emission control element 20 needs to be replaced.

[0029] On the right side of the lower half of Figure 6, the compensator 28 is omitted at the end of the series arrangement 23 of series-connected exhaust gas control elements 20, and a flange connection 31 is formed directly between the can body 21 of each exhaust gas control element 20 and the adjacent portion of the overflow pipe 24.

[0030] In FIG. 6 , no additional compensators 28 are disposed between the can bodies 21 of the series-connected emission control elements 20. Here, the can bodies 21 of the series-connected emission control elements 20 abut one another directly, and in FIG. 6 are directly connected to one another via a roller weld seam 35. FIGS. 7 and 8 show alternatives to the roller weld seam 35 of FIG. 6 for connecting the can bodies 21 of series-connected, directly adjacent emission control elements 20. Thus, in FIG. 7 , the outwardly bent portions of the can body 21 are placed between clamping jaws 36, which can be compressed through a threaded connection to ultimately join the can bodies 21 of directly adjacent emission control elements 20. In FIG. 8 , the adjacent ends of the can bodies 21 are partially inserted into one another, so that one of the can bodies 21 is widened at its end relative to the adjacent can body 21, and the adjacent ends of the can bodies 21 are inserted into one another and then connected to one another, preferably via a weld seam 37.

[0031] 6, baffles 38 may further be positioned upstream and / or downstream of the series arrangement 23 of series-connected exhaust control elements 20 to adjust the cross-sectional area of ​​flow through the series arrangement 23 of exhaust control elements 20. Thus, exhaust gas flow may be adjusted through the parallel-connected series arrangements 23 along the longitudinal extension of the cylinder bank 12 of the series-arranged cylinders 11 for more efficient exhaust gas control when multiple series arrangements 23 are connected in parallel along the longitudinal extension.

[0032] Figures 1 and 2 show an in-line internal combustion engine 10, and Figures 3, 4 and 5 show details of the V-type internal combustion engine 10. With respect to important details of the present invention, the internal combustion engine of Figures 1 and 2 corresponds to the internal combustion engine of Figures 3, 4 and 5, and therefore, to avoid unnecessary duplication, the same reference numerals have been used for like assemblies.

[0033] In the exemplary embodiment of Figures 3 to 5, the exhaust manifold 17, the exhaust gas supply pipe 18 and the exhaust gas discharge pipe 19, each assembled from a number of pipe sections 17a, 18a and 19a with compensators 26 arranged between them, extend along the cylinder bank 12, i.e. immediately adjacent to the cylinders 12, and the exhaust gas control elements 20 form a series arrangement 23, a number of such series arrangements 23 being connected in parallel along the longitudinal extension of the pipes 17, 18 and 19. The series arrangement 23 of Figure 6 can be used both in the internal combustion engines according to Figures 1 and 2 and in the internal combustion engines according to Figures 3, 4 and 5.

[0034] The exemplary embodiments of Figures 1, 2 and 3 to 5 differ mainly only in the relative positions of the pipes 17, 18, 19. In the exemplary embodiment of Figures 1 and 2, the exhaust manifold 17 and the exhaust gas supply pipe 18 are arranged to extend parallel to each other at their vertices, and the exhaust gas discharge pipe 19 is arranged parallel to these but laterally offset, while in the exemplary embodiment of Figures 3, 4 and 5, all three pipes, i.e., the exhaust manifold 17, the exhaust gas supply pipe 18 and the exhaust gas discharge pipe 19, are arranged to extend parallel to each other at their vertices.

[0035] Therefore, in the exemplary embodiments of Figures 3, 4 and 5, the overflow pipe 24 starting from the series arrangement 23 of the exhaust gas control elements 20 is bent and connected to the exhaust gas discharge pipe 19, while in Figures 1 and 2, the overflow pipe 24 between the series arrangement 23 of the exhaust gas control elements 20 and the exhaust gas discharge pipe 19 extends straight.

[0036] In the exemplary embodiment of Figures 3, 4 and 5, a switching device 47 is also shown which influences the control of the flow through the pipes 17, 18 and 19, i.e. the exhaust manifold 17, the exhaust gas supply pipe 18 and the exhaust gas discharge pipe 19. The switching device 47 is formed as a pivotable flap, which is shown in Figure 5 in switching states I and II.

[0037] In particular, when the switching device is in switching state I, the exhaust gas discharged from the exhaust manifold 17 flows into the exhaust gas supply pipe 18, passes from the exhaust gas supply pipe 18 through the exhaust gas control elements 20 in series arrangement 23, flows into the exhaust gas discharge pipe 19, and flows from the exhaust gas discharge pipe 19 in the direction of the turbocharger 15. On the other hand, when the switching device 47 in FIG. 5 is in state II, the exhaust gas discharged from the exhaust manifold 17 flows directly in the direction of the exhaust gas turbocharger 15.

[0038] 11 and 12 show modifications to the series arrangement 23 of series-connected emission control elements 20, and do not show the insulators 29 radially outwardly adjacent to the series-connected emission control elements in FIG. 6. FIG. 11 shows several variations in which the compensator 28 is joined to the can body 21 of the immediately adjacent emission control element 20, as well as variations in which the compensator 28 is connected to a different side of the series arrangement 23.

[0039] In the upper half of Figure 11, the compensator 28 is shown on the left, constructed as a separate assembly with a portion 28a pressed into the can body 21, with a sealing element 39 arranged between the can body 21 and the portion 28a of the compensator 28 pressed into the can body 21. In the alternative of Figure 12, two sealing elements 39 are arranged between the can body 21 and the portion of the compensator 28 pressed into the can body.

[0040] In the bottom half of Figure 11, element 40 is welded to portion 28a of compensator 28 that is pressed into can body 21 of the adjacent emission control element, with element 40 abutting flanged portion 21a of can body 21 of the adjacent emission control element 20. Figure 11 shows weld line 41 between portion 28a of compensator 28 and welded element 40, with element 40 abutting flanged portion 21a of can body 21.

[0041] On the right side of FIG. 11, the compensator 28 is in contact with the can body 21, i.e., in the upper right region of FIG. 11 it is in flat contact with the front surface of the can body 21, and in the lower right region of FIG. 11 it is in contact with the inclined protrusion 21b of the can body 21.

[0042] According to FIG. 11, the compensators 28 arranged on different sides of the series arrangement 23 can be connected to each other via tie rods 42 or alternatively via spring elements 43, which draw or press the compensators 28 airtightly against the can body 21 of the adjacent exhaust gas control element 20.

[0043] 11 shows a variant in which the compensator 28 is attached to the can body 21 of the adjacent emission control element 20 via a bayonet connection 44, and in the process, a pin 45 formed on the can body 21 engages with a corresponding groove 46 in the compensator 28. In this way, the compensator 28 can also be attached gas-tightly to the can body 21 of the corresponding emission control element 20.

[0044] The internal combustion engine 10 according to the present invention comprises at least one cylinder bank 12 of a plurality of cylinders 11 arranged in series, an exhaust manifold 17, an exhaust gas supply pipe 18, and an exhaust gas discharge pipe 19, each extending parallel to and immediately adjacent to the cylinders 11 along the at least one cylinder bank 12, with a plurality of series arrangements 23 of series-connected exhaust gas control elements 20 connected in parallel to one another in the longitudinal direction between the exhaust gas supply pipe 18 and the exhaust gas discharge pipe 19, and thus in the longitudinal direction of the at least one cylinder bank 12. Exhaust gases flow through the exhaust gas control elements 20, i.e., their catalytic converter elements 22, in a direction perpendicular to the flow direction through the exhaust manifold 17, the exhaust gas supply pipe 18, and the exhaust gas discharge pipe 19.

[0045] The can body 21 of the exhaust gas control element 20 functions directly as a pressure vessel and is configured to accommodate exhaust gas pressures of up to 4 bar, 5 bar, or 6 bar, thereby making it possible to omit a separate pressure vessel for receiving the exhaust gas control element 20. This makes it possible to save installation space and mass, and enables efficient exhaust gas control. Due to its low mass, the exhaust gas control element 20 of the internal combustion engine 10 has a low heat storage capacity, which can ensure advantageous transient operating behavior of the internal combustion engine 10. Thermal expansion and mechanical vibrations can be advantageously compensated for through compensators 26 and 28. [Explanation of symbols]

[0046] 10 Internal combustion engine 11 cylinders 12 cylinder banks 13 Exhaust gas aftertreatment device 14 Exhaust gas control devices 15 Exhaust Turbocharger 16 Turbine 17 Exhaust manifold 17a pipe section 18 Exhaust gas supply pipe 18a pipe section 19 Exhaust gas exhaust pipe 19a pipe section 20 Emissions Control Elements 21 Can body 21a part 21b Protrusion 22 Catalytic converter element 23 Series Arrangement 24 Overflow pipe 25 Exhaust gas outlet 26 Compensator 27 Compensator 28 Compensator 28a part 29 Insulators 29a Half shell 30 Clamp Closure 31 Flange connection 32 flange 33 flange 34 Band clamp 35 Roller welding line 36 Clamp jaw 37 Welding Line 38 Baffle 39 Sealing element 40 elements 41 Welding Line 42 tie rod 43 Spring element 44 Bayonet connection 45-pin 46 Groove 47 Switching Device 48 Hose clamp

Claims

1. a plurality of cylinders (11) provided for the combustion of fuel, in the process producing exhaust gases, forming at least one cylinder bank (12) of the plurality of cylinders (11) arranged in series; an exhaust gas aftertreatment system (13) including an exhaust gas control device (14) provided for purifying the exhaust gases of said cylinder (11), and including at least one exhaust turbocharger (15) provided for expanding the exhaust gases of said cylinder (11) and extracting energy in the process; An internal combustion engine (10) having The exhaust gas control device (14) includes a plurality of exhaust gas control elements (20), each of which includes at least one catalytic converter element (22) disposed within a can body (21) that functions as a pressure vessel, the wall thickness of each can body (21) being designed to accommodate exhaust gas pressures of up to 4 bar, or up to 5 bar, or up to 6 bar, or up to 10 bar; The exhaust gas control device (14) includes an exhaust manifold (17) extending along at least one cylinder bank (12), an exhaust gas supply pipe (18) extending along at least one cylinder bank (12), and an exhaust gas discharge pipe (19) extending along at least one cylinder bank (12), and is capable of guiding exhaust gas via the exhaust manifold (17), the exhaust gas supply pipe (18), and the exhaust gas discharge pipe (19), and specifically, Exhaust gas discharged from an exhaust gas outlet (25) of each cylinder (11) is supplied to the exhaust manifold (17); In accordance with the switching state of the switching device (47), in a first switching state of the switching device (47), the exhaust gas discharged from the exhaust manifold (17) is led to the exhaust gas supply pipe (18), led to the exhaust gas control element (20) via the exhaust gas supply pipe (18), passed through the exhaust gas control element (20), led to the exhaust gas discharge pipe (19), and led to the at least one exhaust turbocharger (15) via the exhaust gas discharge pipe (19); In a second switching state of the switching device (47), exhaust gases discharged from the exhaust manifold (17) bypass the exhaust gas control element (20) and are guided directly towards at least one exhaust turbocharger (15); the exhaust manifold (17), the exhaust gas supply pipe (18), and the exhaust gas discharge pipe (19) each include a plurality of pipe sections (17a, 18a, 19a), and compensators (26) are arranged between the pipe sections (17a, 18a, 19a) to compensate for thermal expansion; An internal combustion engine (10) in which a compensator (28) for compensation of thermal expansion and vibration compensation is capable of interacting with said exhaust gas control element (20).

2. 2. The internal combustion engine (10) of claim 1, wherein exhaust gas flows through the exhaust gas control element (20), i.e., the catalytic converter element (22) of the exhaust gas control element (20), in a direction perpendicular to the direction of flow through the exhaust manifold (17), the exhaust gas supply pipe (18), and the exhaust gas discharge pipe (19).

3. 2. The internal combustion engine (10) of claim 1, wherein the can body (21) has a wall thickness between 1.5 mm and 6 mm.

4. 2. The internal combustion engine (10) of claim 1, wherein a baffle (38) is disposed upstream or downstream of the exhaust gas control element (20) to regulate exhaust gas flow through the exhaust gas control element (20) and along at least one of the cylinder banks (12).

5. 2. The internal combustion engine (10) according to claim 1, wherein a plurality of exhaust gas control elements (20) are connected in series one after the other, and along at least one of the cylinder banks (12), a plurality of series arrangements (23) of the exhaust gas control elements (20) are connected in parallel with one another between the exhaust gas supply pipe (18) and the exhaust gas discharge pipe (19).

6. 6. The internal combustion engine (10) of claim 5, wherein in the region of each series arrangement (23) of the exhaust gas control elements (20), the can bodies (21) of immediately adjacent exhaust gas control elements (20) are connected to one another.

7. 6. An internal combustion engine (10) according to claim 5, wherein in the region of each series arrangement (23) of exhaust gas control elements (20), a compensator (28) for compensating thermal expansion and vibration compensation is arranged upstream and / or downstream of the exhaust gas control elements (20).

8. 8. An internal combustion engine (10) according to claim 7, wherein each compensator (28) for thermal expansion compensation and vibration compensation is an integral component of each can body (21).

9. 8. The internal combustion engine (10) of claim 7, wherein each compensator (28) for thermal expansion compensation and vibration compensation is configured as a separate assembly connected to the can body (21) of the adjacent exhaust gas control element (20) or to other compensators (28) of each series arrangement (23).

10. 2. The internal combustion engine (10) of claim 1, wherein the switching device (47) includes a flap that opens a direct exhaust gas flow from the exhaust manifold (17) to the exhaust turbocharger (15) or blocks a direct exhaust gas flow from the exhaust manifold (17) to the exhaust turbocharger (15).

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