Internal combustion engine

Abstract

The invention relates to an internal combustion engine having a plurality of cylinders forming at least one cylinder group, an emission control device comprising a plurality of emission control elements having at least one catalytic converter element arranged in a jacket, the wall thickness of which is designed for an exhaust gas pressure of at most 10 bar, and an exhaust gas turbocharger, the exhaust control device includes an exhaust manifold, an exhaust feed pipe, and an exhaust discharge pipe, and exhaust gas may be guided such that exhaust gas emitted from the cylinder may be fed to the exhaust manifold. In a first switching state of the switching unit, exhaust gas emitted from the exhaust manifold can be guided into the exhaust gas feed pipe, in the direction of the emission control element, into the exhaust gas discharge pipe, in the direction of the exhaust gas turbocharger, and into the exhaust gas discharge pipe, in the direction of the exhaust gas turbocharger. In the second switching state, exhaust gas emanating from the exhaust manifold bypassing the emission control element is conducted directly in the direction of the exhaust gas turbocharger, and the tube comprises a plurality of tube sections in which compensators are arranged, which interact with the emission control element.

Description

Technical Field

[0001] This invention relates to an internal combustion engine.

[0002] This invention specifically relates to the field of so-called large engines or large internal combustion engines, whose cylinders have a piston diameter of at least 140 mm, particularly at least 175 mm. Such large internal combustion engines are, for example, ship engines. Background Technology

[0003] DE102016205327A1 discloses an internal combustion engine with an exhaust gas aftertreatment system, which includes an exhaust gas boosting system. The exhaust gas boosting system preferably includes a high-pressure exhaust gas turbocharger and a low-pressure exhaust gas turbocharger, wherein, in the exhaust gas turbocharger, the thermal energy of the exhaust gas is converted into mechanical energy to compress the boost air to be fed into the internal combustion engine. The exhaust gas aftertreatment system also includes an SCR emission control system equipped to purify the exhaust gas of the internal combustion engine. Preferably, the SCR emission control system is connected between the high-pressure turbine of the high-pressure exhaust gas turbocharger and the low-pressure turbine of the low-pressure exhaust gas turbocharger.

[0004] There is a need for an internal combustion engine that enables effective emission control in the area of ​​the emission control device, characterized by high conversion efficiency, low installation space requirements, low mass, and therefore low heat storage capacity and low vibration load. Summary of the Invention

[0005] Therefore, the present invention aims to create a novel internal combustion engine. This objective is achieved by the internal combustion engine according to claim 1.

[0006] The internal combustion engine according to the invention includes a plurality of cylinders configured for burning fuel, wherein exhaust gases are generated in the process, and wherein the cylinders form at least one cylinder bank of a plurality of cylinders arranged in an in-line configuration. The internal combustion engine according to the invention includes an exhaust aftertreatment system comprising an emission control device configured for purifying the exhaust gases from the cylinders and including at least one exhaust gas turbocharger configured to expand the exhaust gases from the cylinders and extract energy in the process.

[0007] The emission control device for an internal combustion engine according to the invention includes a plurality of emission control elements, each of which includes at least one catalytic converter element disposed in a casing serving as a pressure vessel, wherein the wall thickness of the casing is designed for an exhaust gas pressure of up to 4 bar, or up to 5 bar, or up to 6 bar.

[0008] The emission control device for an internal combustion engine according to the invention further includes an exhaust manifold extending along the at least one cylinder bank, an exhaust feed pipe extending along the at least one cylinder bank, and at least one exhaust discharge pipe extending along the at least one cylinder bank. Exhaust gas can be guided via the exhaust manifold, the exhaust feed pipe, and the exhaust discharge pipe in such a manner that exhaust gas from the exhaust outlet port of the corresponding cylinder can be fed into the exhaust manifold. Depending on the switching state of the switching unit, in a first switching state, exhaust gas from the exhaust manifold can be guided into the exhaust feed pipe, guided in the direction of the emission control element via the exhaust feed pipe, guided into the exhaust discharge pipe after flowing past the emission control element, and guided in the direction of the at least one exhaust gas turbocharger via the exhaust discharge pipe. In a second switching state of the switching unit, exhaust gas from the exhaust manifold bypassing the emission control element can be directly guided in the direction of the at least one exhaust gas turbocharger.

[0009] The exhaust manifold, exhaust feed pipe, and exhaust discharge pipe of the emission control device for an internal combustion engine according to the present invention each include multiple pipe sections, and a compensator is arranged between the pipe sections to compensate for thermal expansion.

[0010] Additional compensators for compensating for thermal expansion and vibration compensation interact with the emission control elements of the emission control device of the internal combustion engine according to the invention.

[0011] The internal combustion engine according to the invention allows for effective emission control with high conversion efficiency, low installation space requirements, low mass and therefore low heat storage capacity, and low vibration load in the area of ​​the emission control device. The emission control element is installed directly adjacent to the cylinders of the internal combustion engine in the area of ​​an exhaust manifold extending along the respective cylinder bank, an exhaust feed pipe extending along the respective cylinder bank, and an exhaust outlet pipe extending along the respective cylinder bank, upstream of at least one exhaust gas turbocharger, where exhaust gas flows through the emission control element at high temperature and high pressure levels (i.e., at a nearly constant flow rate with almost no pressure pulsation). The casing of the emission control element, 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, directly serves as a pressure vessel, making a separate pressure vessel for housing the emission control element redundant. This is important for reducing the mass and therefore heat storage capacity in the area of ​​the emission control device to ensure favorable transient operating behavior of the internal combustion engine. Thermal expansion and mechanical vibration in the area of ​​the emission control device can be compensated for by a compensator. Finally, by combining the above features, effective emission control with high conversion efficiency, low installation space requirements, low mass and therefore low heat storage capacity, and low vibration load is possible in the area of ​​emission control devices.

[0012] Preferably, exhaust gas flows through the emission control element, i.e., the catalytic converter element, in a direction perpendicular to the flow direction of the exhaust manifold, exhaust feeder, and exhaust outlet. This allows the emission control element to be arranged between the exhaust feeder and exhaust outlet with low installation space requirements. Furthermore, this allows flow through the catalytic converter element at high temperatures and pressure levels, and at nearly constant flow rates with virtually no pressure pulsation. Therefore, these features also contribute to providing effective emission control with high conversion rates, low installation space requirements, low mass, and low vibration loads in the area of ​​the emission control device.

[0013] Preferably, the wall thickness of the cladding is between 1.5 mm and 6 mm, more 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 wall thicknesses of the cladding are preferred so that the cladding can be directly used as a pressure vessel at exhaust gas pressures of up to 4 bar, or up to 5 bar, or up to 6 bar, or up to 10 bar, thus eliminating the need for a separate pressure vessel. This is particularly advantageous in maintaining low installation requirements and mass in the area of ​​the emission control device, as well as heat storage capacity, and thus enabling effective emission control and good transient operating behavior.

[0014] Preferably, multiple, or more preferably two or three, emission control elements are connected in series, one after the other, and along the at least one cylinder bank, such series configurations of the emission control elements are parallel to each other between the exhaust feed pipe and the exhaust discharge pipe, wherein baffles are arranged upstream or downstream of the emission control elements to balance the exhaust flow through the emission control elements along the at least one cylinder bank. This also serves to ensure effective emission control and low installation space requirements. Attached Figure Description

[0015] Preferred further improvements of the invention are obtained from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with the aid of the accompanying drawings, but are not limited thereto. The drawings are shown as follows:

[0016] Figure 1 : A front view selected from an inline internal combustion engine in the area of ​​the emission control device for an internal combustion engine;

[0017] Figure 2 : through Figure 1 The plan view selected in the observation direction II of the internal combustion engine;

[0018] Figure 3: A front view selected from a V-type internal combustion engine in the area of ​​the emission control device of an internal combustion engine;

[0019] Figure 4 : through Figure 2 A view taken from the perspective IV of the internal combustion engine.

[0020] Figure 5 : Figure 3 , Figure 4 A side view of the emission control device of an internal combustion engine;

[0021] Figure 6 : Having multiple embodiment variations Figure 1 , Figure 2 and Figure 3 , Figure 4 , Figure 5 Details of the emission control device for internal combustion engines;

[0022] Figure 7 : Figure 6 Other embodiments and variations;

[0023] Figure 8 : Figure 6 Other embodiments and variations;

[0024] Figure 9 : on the cross-sectional direction IX-IX Figure 6 Details;

[0025] Figure 10 : Figure 9 Detailed alternative options;

[0026] Figure 11 : Having multiple embodiment variations Figure 6 Detailed alternative options;

[0027] Figure 12 : Figure 11 Other embodiments and variations thereof. Detailed Implementation

[0028] Figure 1 , Figure 2 Different views of an exemplary embodiment of an internal combustion engine 10 according to the present invention are shown. The internal combustion engine 10 includes a plurality of cylinders 11 arranged close to each other in a straight line to form a single cylinder group 12. Figure 1 , Figure 2 The internal combustion engine 10 is an inline 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 cylinder bank 12 having a plurality of cylinders 11 arranged in an inline configuration. In this case, the cylinders 11 of the two cylinder banks 12 thus have a V-shaped configuration relative to each other. Figure 3 , Figure 4 and Figure 5 Details of a V-type internal combustion engine 10 according to the present invention are shown. The number of cylinders 11 and the number of cylinder banks 12 can be arbitrary.

[0029] The internal combustion engine 10 includes an exhaust aftertreatment system 13, which includes an emission control device 14 and further includes at least one exhaust gas turbocharger 15. The at least one exhaust gas turbocharger 15 is equipped to expand exhaust gases from cylinders 11, which are purified in the emission control device 14, thereby extracting mechanical energy for compressing boost air to be fed into cylinders 11. The corresponding exhaust gas turbocharger 15 includes a turbine 16 for expanding the purified exhaust gases and a compressor (not shown) for compressing the boost air. A muffler (not shown) may be located upstream of the compressor.

[0030] The emission control device 13 of the internal combustion engine 10 includes an exhaust manifold 17 extending along at least one cylinder bank 12, an exhaust feed pipe 18 extending along at least one cylinder bank 12 parallel to the exhaust manifold 17, and an exhaust outlet pipe 19 also extending along at least one cylinder bank 10 parallel to the exhaust manifold 12. Furthermore, the emission control device 13 includes a plurality of emission control elements 20, each of which includes at least one catalytic converter element 22 disposed within a housing 21. At multiple locations along at least one cylinder bank 12, in the illustrated exemplary embodiment, a series configuration 23 of the plurality of emission control elements 20 arranged in series one after another is arranged between the exhaust feed pipe 18 and the exhaust outlet pipe 19, wherein the series configuration 23 of the emission control elements 20 arranged in series one after another is connected parallel to each other between the exhaust feed pipe 18 and the exhaust outlet pipe 19.

[0031] exist Figure 1 and Figure 2 In an exemplary embodiment, the exhaust feed pipe 18 is connected to each of the series configurations 23 of a plurality of emission control elements 20 via a connecting elbow or overflow passage 24, such that exhaust gas can be fed from the exhaust feed pipe 18 to the emission control elements 20, i.e., the series configurations 23 of the plurality of emission control elements 20 are each connected in parallel to each other. Additionally, each of the series configurations 23 of the plurality of emission control elements 20 is connected to the exhaust discharge pipe 19 via a connecting elbow or overflow passage 24, such that exhaust gas from the series configurations 23 of the plurality of emission control elements 20 can each overflow into the exhaust discharge pipe 19.

[0032] Exhaust gas flows through the exhaust manifold 17, exhaust feed pipe 18, and exhaust outlet pipe 19 in such a manner that the exhaust gas from the corresponding cylinder 11, originating from the exhaust outlet port 25 of the corresponding cylinder 11, initially flows into the exhaust manifold 17. Figure 5 China's target Figures 1 to 5 In the first switching state of the exemplary embodiment of the switching unit 47, exhaust gas emitted from the exhaust manifold 17 can flow into the exhaust feed pipe 18 so as to pass through the exhaust feed pipe 18 and Figure 1 , Figure 2 The exhaust gas flows through the overflow passage 24 in the direction of the emission control element 20 of the series configuration 23. Passing through the emission control element 20 of the series configuration 23, the exhaust gas can be guided into the exhaust pipe 19 so that it flows in the direction of at least one exhaust gas turbocharger 15 (i.e., the turbine 16 of the exhaust gas turbocharger 15). In the second switching state of the switching unit 47, the exhaust gas from the exhaust manifold 17 bypassing the emission control element 23 can be directly guided in the direction of at least one exhaust gas turbocharger.

[0033] Therefore, the exhaust manifold 17, exhaust feed pipe 18, exhaust discharge pipe 19 and emission control element 20 are installed adjacent to the cylinder 11 on the internal combustion engine 10.

[0034] As already explained, each emission control element 20 (in the illustrated exemplary embodiment, grouped into a series configuration 23 of emission control elements 20 connected in parallel to each other) includes a housing 21, which, according to the 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, such that the corresponding housing 21 thus directly serves as a pressure vessel for the emission control element 20, thereby eliminating the need for a separate pressure vessel. For this purpose, the housing 21 preferably has a wall thickness 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. Therefore, a separate pressure vessel can be omitted, which requires a large installation space and has a greater weight and therefore a higher heat storage capacity. Consequently, the transient operating behavior of the internal combustion engine when it transitions between different operating states, as well as emission control during transient operating behavior, can be particularly improved.

[0035] The exhaust manifold 17, exhaust feed pipe 18, and exhaust discharge pipe 19 each include multiple pipe sections 17a, 18a, and 19a, with compensators 26 arranged between these sections to compensate for thermal expansion. Compensators 27 for compensating for thermal expansion are also connected between the exhaust outlet port 25 of the corresponding cylinder 11 and the exhaust manifold 17. At least one compensator 28 is also employed in the region from the series configuration 23 of the series-connected emission control elements 20. Several different embodiments are shown in the illustration. Figure 6 In this configuration, compensators 28 are arranged at each of the two ends of the emission control elements 20 arranged in series, which are used to compensate for thermal expansion and mechanical vibration. The compensators 28 may also be present only at one end of such series configuration 23, that is, at the inlet-side end or the outlet-side end of the respective series configuration 23.

[0036] according to Figure 6 The emission control element 20 of the series configuration 23 is surrounded by thermal insulation 29. For example... Figure 9 and Figure 10 As shown, the thermal insulation 29 can be formed of half-shells 29a, which are form-fitted together at their adjacent ends, and Figure 9 The middle parts are connected to each other via clamping closure 30.

[0037] exist Figure 6 The upper half shows an embodiment of the compensator 28, wherein the compensator 28 is formed as an integral part of the housing 20. Therefore, Figure 6 The upper portion of the compensator 28 is designed as a single-piece extension of the corresponding housing 21 and acts on the adjacent exhaust gas conduction assembly via a flange connection 31. This adjacent exhaust gas conduction assembly may be a section of the overflow channel 24. Figure 6 In the upper part, the flange 32 of the corresponding compensator 28 abuts against the flange 33 of the overflow channel 24, wherein, according to Figure 6 These flanges 32 and 33 are connected by V-shaped or U-shaped clips 34.

[0038] exist Figure 6 In the lower half, a compensator 28 is shown on the upper left. This compensator 28 is designed as a separate component, and each component is connected via flange connections 31 to the housing 21 of the adjacent emission control element 20 on one side, and to the adjacent section of the overflow passage 24 on the other side. Therefore, this separate compensator 28 can be reused when the emission control element 20 must be replaced.

[0039] exist Figure 6On the upper right side of the lower half, it is shown that the compensator 28 is omitted at the end of the series configuration 23 of the emission control elements 20 connected in series, where the flange connection 31 is thus formed directly between the shell 21 of the corresponding emission control element 20 and the adjacent section of the overflow channel 24.

[0040] exist Figure 6 In this configuration, no additional compensators 28 are arranged between the housings 21 of the emission control elements 20 connected in series. Here, the housings 21 of the emission control elements 20 connected in series are actually in direct contact with each other, and... Figure 6 The components are directly connected to each other via roll weld 35. Figure 7 and Figure 8 Show Figure 6 An alternative to the roll weld 35 is to connect the housing 21 of the emission control elements 20, which are connected in series and directly adjacent to each other. Therefore, in Figure 7 In this configuration, outwardly curved sections of the housing 21 are arranged between clamping jaws 36, which are compressible via threaded connections to ultimately connect to the housing 21 of the directly adjacent emission control element 20. Figure 8 In this process, the adjacent ends of the shells 21 are partially inserted into each other, such that one of the shells 21 is widened at its end relative to the adjacent shell 21 so that the adjacent ends of the shells 21 are inserted into each other and then preferentially connected to each other via weld 37.

[0041] In addition, from Figure 6 It is evident that baffles 38 may be arranged upstream and / or downstream of the series configuration 23 of the emission control elements 20 connected in series, in order to regulate the flow cross-section through the series configuration 23 of the emission control elements 20. Thus, along the longitudinal range of the cylinder bank 12 of the in-line arranged cylinders 11 (along which multiple series configurations 23 are connected in parallel), the exhaust gas flow can be balanced via the parallel-connected series configurations 23, thereby making emission control even more efficient.

[0042] Figure 1 and Figure 2 The inline internal combustion engine 10 is shown, while Figure 3 , Figure 4 and Figure 5 Details of the V-type internal combustion engine 10 are shown. Regarding details important to the invention, Figure 1 , Figure 2 internal combustion engine and Figure 3 , Figure 4 and Figure 5 Corresponding to the internal combustion engine, therefore, to avoid unnecessary repetition, the same reference numerals are used for the same components.

[0043] exist Figures 3 to 5In an exemplary embodiment, the exhaust manifold 12, the exhaust feed pipe 18, and the exhaust discharge pipe 19 (each of which is assembled from a plurality of pipe sections 17a, 18a, and 19a, wherein a compensator 26 is arranged between the pipe sections) also extend along the cylinder bank 12 (i.e., adjacent to the cylinder bank 12), wherein the emission control element 20 forms a series configuration 23, and wherein a plurality of such series configurations 23 are connected in parallel along the longitudinal extent of the pipes 17, 18, and 19. Figure 6 The series structure 23 can be connected with Figure 1 , Figure 2 It can be used with internal combustion engines, and can also be used with Figure 3 , Figure 4 and Figure 5 They are used together with internal combustion engines.

[0044] Figure 1 , Figure 2 and Figures 3 to 5 The exemplary embodiments differ essentially only in the positions of pipes 17, 18, and 19 relative to each other. Although in Figure 1 and Figure 2 In the exemplary embodiment, the exhaust manifold 17 and the exhaust feed pipe 18 are arranged to overlap each other in a manner that extends parallel to each other, and the exhaust outlet pipe 19 is positioned laterally offset parallel to them, but... Figure 3 , Figure 4 and Figure 5 In an exemplary embodiment, all three pipes (i.e., exhaust manifold 17, exhaust feed pipe 18, and exhaust discharge pipe 19) are positioned to overlap each other in a manner that extends parallel to each other.

[0045] Therefore, in Figure 3 , Figure 4 and Figure 5 In an exemplary embodiment, the overflow passage 24 emanating from the series configuration 23 of the emission control element 20 also bends into the exhaust pipe 19, while Figure 1 and Figure 2 In the middle, the overflow passage 24 between the series configuration 23 of the emission control element 20 and the exhaust pipe 19 extends in a straight line.

[0046] for Figure 3 , Figure 4 and Figure 5 An exemplary embodiment also illustrates a switching unit 47 that influences flow control through pipes 17, 18, and 19 (i.e., through exhaust manifold 17, exhaust feed pipe 18, and exhaust discharge pipe 19). The switching unit 47... Figure 5 The middle part forms a pivotable flap, which in Figure 5 The diagram shows states I and II in transition.

[0047] Specifically, when the switching unit is in switching state I, exhaust gas from the exhaust manifold 17 flows from there through the emission control element 20 of the series configuration 23 into the exhaust feed pipe 18, and then into the exhaust outlet pipe 19, so as to flow from the exhaust outlet pipe 19 in the direction of the turbocharger 15. In contrast, when Figure 5 When the switching unit 47 is in state II, the exhaust gas emitted from the exhaust manifold 17 flows directly in the direction of the exhaust gas turbocharger 15.

[0048] Figure 11 , Figure 12 A modification to the series configuration 23 of the emission control elements 20 arranged in series is shown, wherein, in Figure 11 , Figure 12 Insulation 29 is not shown in the diagram. Figure 6 The emission control elements are connected in series, adjacent to each other on the radially outer side. Figure 11 Several variations are shown for connecting the compensating element 28 to the housing 21 of the directly adjacent emission control element 20 and for connecting compensators 28 arranged on different sides of the series configuration 28.

[0049] exist Figure 11 In the upper half, a compensator 28 is shown on the left side. This compensator 28 is implemented as a separate component and has a section 28a that is pushed onto the housing 21. A sealing element 39 is arranged between the section 28a of the compensating element 28 pushed onto the housing 21 and the housing 21. Figure 12 In the alternative, two sealing elements 39 are arranged between the section of the compensator 28 that is pushed onto the housing and the housing 21.

[0050] exist Figure 11 In the lower half, component 40 is welded to section 28a of compensator 28, which is pushed onto the housing 21 of adjacent emission control element, and component 40 abuts against the flanged-over section 21a of housing 21 of adjacent emission control element 20. Figure 11 The weld 41 between the compensator 28 segment 28a and the welded element 40 is shown, the welded element 40 abutting against the flange covering segment 21a of the housing 21.

[0051] exist Figure 11 On the upper right side, the compensator 28 abuts against the casing 21, that is, at Figure 11 The upper right region is flat against the front side of the casing 21, and in Figure 11 The angled protrusion 21b abuts against the shell 21 in the lower right region.

[0052] according to Figure 11The compensators 28 arranged on different sides of the series configuration 23 can be connected to each other via a pull rod 42 or alternatively via a spring element 43, so as to pull or push the compensator 28 against the housing 21 of the adjacent emission control element 20 in an airtight manner.

[0053] also, Figure 11 A variation is shown in which the compensator 28 is attached to the housing 21 of the adjacent emission control element 20 via a bayonet connection 44, wherein, in this process, a pin 45 formed on the housing 21 engages in a corresponding groove 46 in the compensator 28. In this way, the compensator 28 can also be attached to the housing 21 of the corresponding emission control element 20 in an airtight manner.

[0054] In the internal combustion engine 10 according to the invention (which includes at least one cylinder bank 12 comprising a plurality of cylinders 11 arranged in series), an exhaust manifold 17, an exhaust feed pipe 18, and an exhaust outlet pipe 19 each extend parallel to the at least one cylinder bank 12 directly adjacent to the cylinders 11. Between the exhaust feed pipe 18 and the exhaust outlet pipe 19, in the longitudinal direction of the exhaust feed pipe 18 and the exhaust outlet pipe 19, and therefore in the longitudinal direction of the at least one cylinder bank 12, a plurality of series-connected emission control elements 20 are connected parallel to each other. Exhaust gas flows through the emission control elements 20, i.e., through the catalytic converter element 22 of the emission control elements 20, in a direction perpendicular to the flow direction of the exhaust manifold 17, the exhaust feed pipe 18, and the exhaust outlet pipe 19.

[0055] The housing 21 of the emission control element 20 serves directly as a pressure vessel and is designed for exhaust pressures of up to 4 bar, 5 bar, or 6 bar, eliminating the need for a separate pressure vessel to house the emission control element 20. This saves installation space and mass, enabling efficient emission control. Due to its low mass, the emission control element 14 of the internal combustion engine 10 has low heat storage capacity, ensuring favorable transient operating behavior of the internal combustion engine 10. Thermal expansion and mechanical vibration can be advantageously compensated for via compensators 26 and 28.

[0056] List of reference numerals 10 Internal Combustion Engine 11 cylinders 12-cylinder group 13 Exhaust Gas Aftertreatment System 14. Emission control devices 15. Exhaust gas turbocharger 16 Turbo 17. Exhaust Manifold 17a Pipe Section 18 Exhaust feed pipe 18a pipe section 19. Exhaust pipe 19a Pipe Section 20 Emission control components 21. Encasing Section 21a 21b Protrusion 22 Catalytic converter elements 23. Series Construction 24 Overflow Channel 25 Exhaust outlet port 26 Compensators 27 Compensator 28 Compensator Section 28a 29 Insulation 29a Half-shell 30 Clamping closure 31 Flange Connection 32 flange 33 Flange 34 with clip 35 Roll weld 36 clamping claws 37 Weld 38 baffles 39 Sealing elements 40 components 41 Weld 42 pull rod 43 Spring elements 44. Bayonet connection 45 sales 46 Grooves 47 Switching Unit 48. Hose clamp.

Claims

1. An internal combustion engine (10), It has multiple cylinders (11), said multiple cylinders (11) being equipped for burning fuel, wherein, Exhaust gas is generated during the process, wherein the cylinders (11) form at least one cylinder group (12) of a plurality of cylinders (11) arranged in series. The system includes an exhaust aftertreatment system (13) comprising an emission control device (14) equipped for purifying the exhaust gas from the cylinder (11) and including at least one exhaust gas turbocharger (15) equipped for expanding the exhaust gas from the cylinder (11) and extracting energy in the process. The emission control device (14) includes a plurality of emission control elements (20), each of which includes at least one catalytic converter element (22) arranged in a casing (21) serving as a pressure vessel. The wall thickness of the corresponding casing (21) is designed for exhaust gas pressures of up to 4 bar, 5 bar, 6 bar, or 10 bar. The emission control device (14) includes an exhaust manifold (17) extending along the at least one cylinder bank (12), an exhaust feed pipe (18) extending along the at least one cylinder bank (12), and an exhaust outlet pipe (19) extending along the at least one cylinder bank (12). The exhaust gas can be guided in such a manner via the exhaust manifold (17), the exhaust feed pipe (18), and the exhaust outlet pipe (19). Even if the exhaust gas from the corresponding cylinder (11) emitted from the exhaust outlet port (25) of the corresponding cylinder (11) can be fed into the exhaust manifold (17), and Depending on the switching state of the switching unit (47), in the first switching state of the switching unit (47), the exhaust gas emitted from the exhaust manifold (17) can be guided into the exhaust feed pipe (18), and guided in the direction of the emission control element (20) via the exhaust feed pipe (18). Once it flows past the emission control element (20), it is guided into the exhaust outlet pipe (19), and guided in the direction of the at least one exhaust gas turbocharger (15) via the exhaust outlet pipe (19). In the second switching state of the switching unit (47), the exhaust gas emitted from the exhaust manifold (17) that bypasses the emission control element (20) can be directly guided in the direction of the at least one exhaust gas turbocharger (15). The exhaust manifold (17), the exhaust feed pipe (18), and the exhaust discharge pipe (19) each include multiple pipe sections (17a, 18a, 19a), and a compensator (26) for compensating for thermal expansion is arranged between the pipe sections (17a, 18a, 19a). The compensator (28) used for compensating for thermal expansion and for vibration compensation can interact with the emission control element (20).

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

3. The internal combustion engine (10) according to claim 1 or 2, in, The wall thickness of the casing (21) is between 1.5 mm and 6 mm, preferably between 1.5 mm and 5 mm, or between 2 mm and 5 mm, and particularly preferably between 2 mm and 4 mm, or between 2 mm and 3 mm, or between 3 mm and 4 mm.

4. The internal combustion engine (10) according to claim 1, 2 or 3, in, A baffle (38) is arranged upstream or downstream of the emission control element (20) to balance the exhaust gas flow through the emission control element (20) along the at least one cylinder bank (12).

5. The internal combustion engine (10) according to any one of claims 1 to 4, in, Multiple, preferably two or three emission control elements (20) are connected in series one after another, and along the at least one cylinder bank (12), multiple such series configurations (23) of the emission control elements (20) are connected parallel to each other between the exhaust feed pipe (18) and the exhaust discharge pipe (19).

6. The internal combustion engine (10) according to claim 5, in, In each region of the series configuration (23) of the emission control elements (20), the shells (21) of directly adjacent emission control elements (20) are connected to each other.

7. The internal combustion engine (10) according to claim 5 or 6, in, In the region of each series configuration (23) of the emission control element (20) upstream and / or downstream of the emission control element (20), a compensator (28) is arranged for compensating for thermal expansion and for vibration compensation.

8. The internal combustion engine (10) according to claim 7, in, The corresponding compensator (28) for compensating for thermal expansion and for vibration compensation is an integral part of the corresponding housing (21).

9. The internal combustion engine (10) according to claim 7, in, The corresponding compensators (28) for compensating for thermal expansion and for vibration compensation are designed as separate components, which are connected to the housing (21) of the adjacent emission control element (20) or to another compensator (28) connected to the corresponding series configuration (23).

10. The internal combustion engine (10) according to any one of claims 1 to 9, in, The switching unit (47) includes a flap that opens the direct exhaust gas flow from the exhaust manifold (17) to the exhaust gas turbocharger (15), or blocks the direct exhaust gas flow from the exhaust manifold (17) to the exhaust gas turbocharger (15).

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