DE102010037971B4 - Exhaust gas aftertreatment system for an internal combustion engine - Google Patents

Abstract

Exhaust gas aftertreatment system for an internal combustion engine with at least one cylinder group comprising several cylinders, wherein exhaust gas from the cylinders of the or each cylinder group can be fed via at least one exhaust manifold in each case to an exhaust gas aftertreatment device assigned to the respective cylinder group, the exhaust gas aftertreatment device (12) having an exhaust gas particle filter (14) and one parallel to the Exhaust particle filter (14) connected catalyst (15), wherein the exhaust gas of the respective cylinder group (11) depending on the operating point of the internal combustion engine either completely via the exhaust particle filter (14) or partially via the exhaust particle filter (14) and partially via the catalytic converter (15). is, wherein the or each cylinder group is assigned an exhaust gas turbocharger (20) in such a way that the exhaust gas from the cylinders (10), which can be conducted via the exhaust particle filter (14) of the respective exhaust gas aftertreatment device (12), starting from the cylinders (10) initially via a turbine (21) of the exhaust gas turbocharger (20) and after passing through the turbine (21) of the exhaust gas turbocharger (20) via the exhaust gas particle filter (14), the exhaust gas turbocharger (20) being assigned a bypass valve (23) through which exhaust gas can be conducted via the catalytic converter (15) of the respective exhaust gas aftertreatment device (12), bypassing the exhaust gas turbocharger (20) and bypassing the exhaust gas particle filter (14).

Description

The invention relates to an exhaust gas aftertreatment system for an internal combustion engine.

The exhaust aftertreatment of the exhaust gas from a motor vehicle's internal combustion engine is becoming increasingly important due to increasingly strict exhaust regulations. In particular, exhaust gas particles must also be removed from the exhaust gas in gasoline internal combustion engines.

From the US 5,737,918 A an exhaust gas aftertreatment device for an internal combustion engine is known, which comprises, on the one hand, an exhaust gas particle filter and, on the other hand, a catalytic converter, the exhaust gas particle filter and the catalytic converter being connected in parallel to one another in such a way that the exhaust gas catalytic converter is surrounded on the outside in a ring-like or concentric manner by the exhaust gas particle filter. According to this prior art, the exhaust particulate filter and the catalytic converter are positioned in a common housing, so that a first part of the exhaust gas flowing through the housing can be conducted through the catalytic converter and a second part of the exhaust gas flowing through the housing can be conducted through the exhaust particulate filter.

DE 40 04 424 A1 discloses an exhaust gas aftertreatment system for an internal combustion engine with at least one cylinder group comprising several cylinders. Exhaust gas from the cylinders of the or each cylinder group can be fed via at least one exhaust manifold to an exhaust gas aftertreatment device assigned to the respective cylinder group. The exhaust gas aftertreatment device comprises a soot filter and a catalytic converter connected in parallel to the soot filter, with the exhaust gas from the respective cylinder group being able to be conducted either via the soot filter or via the catalytic converter.

WO 2003/ 050 398 A1 discloses another exhaust aftertreatment system with an exhaust particulate filter and a catalytic converter connected in parallel to the soot filter.

DE 10 2006 038 291 A1 discloses further state of the art.

Based on this, the present invention is based on the object of creating a novel exhaust gas aftertreatment system for an internal combustion engine with reduced exhaust particle emissions.

This object is achieved by an exhaust gas aftertreatment system according to claim 1 and an exhaust gas aftertreatment system according to claim 8.

According to claim 1, an exhaust gas turbocharger is assigned to the or each cylinder group in such a way that the exhaust gas from the cylinders, which can be conducted via the exhaust gas particle filter of the respective exhaust gas aftertreatment device, starts from the cylinders first via a turbine of the exhaust gas turbocharger and after passing through the turbine of the exhaust gas turbocharger via the exhaust gas particle filter can be conducted, wherein the exhaust gas turbocharger is assigned a bypass valve, via which exhaust gas can be conducted via the catalytic converter of the respective exhaust gas aftertreatment device, bypassing the exhaust gas turbocharger and bypassing the exhaust particle filter.

According to claim 8, several exhaust manifolds are assigned to the respective cylinder group, with a first exhaust manifold from first exhaust valves and a second exhaust manifold from second exhaust valves leading the cylinder to a turbine of an exhaust gas turbocharger, with the exhaust gas turbocharger being assigned a bypass valve, with the bypass valve being fully open The exhaust gas guided through the first and second exhaust manifolds can be conducted completely via the exhaust gas particle filter, bypassing the exhaust gas turbocharger, and with the bypass valve partially closed, bypassing the exhaust gas turbocharger, it can be conducted partly via the exhaust gas particle filter and partly via the turbine of the exhaust gas turbocharger and subsequently via the catalytic converter.

An exhaust gas aftertreatment system for an internal combustion engine of a motor vehicle is proposed, in which, depending on the operating point of the internal combustion engine, exhaust gas can be conducted either completely via at least one exhaust gas particle filter or partially via at least one exhaust gas particle filter and partially via at least one catalytic converter.

Through this application of exhaust gas to the or each exhaust particle filter and the or each catalytic converter, which is dependent on the operating point of the internal combustion engine, the quality of the exhaust gas aftertreatment, in particular the reduction of exhaust gas particle emissions, can be further increased.

Preferably, the exhaust gas of the respective cylinder group can be conducted completely via the exhaust gas particle filter when the internal combustion engine is warming up and/or when the internal combustion engine is at partial load and/or when the internal combustion engine is at full load in a lower speed range. When the internal combustion engine is at full load in a medium speed range and/or when the internal combustion engine is at full load in an upper speed range, the exhaust gas from the respective cylinder group can be conducted partly via the exhaust particle filter and partly via the catalytic converter.

According to an advantageous development of the exhaust aftertreatment system according to claim 1, several exhaust manifolds are assigned to the respective cylinder group, with a first exhaust manifold leading from first exhaust valves of the cylinders of the cylinder group to the exhaust particulate filter and a second exhaust manifold leading from second exhaust valves of the cylinders of the cylinder group to the catalytic converter, and either the second Exhaust valves are designed to be switched on and off depending on the operating point of the internal combustion engine, or a check valve is assigned to the second exhaust manifold, which is opened or closed depending on the operating point of the internal combustion engine. If exhaust gas can be supplied to the or each exhaust particulate filter and the or each catalytic converter via separate exhaust manifolds, a particularly preferred exhaust gas routing is possible.

By integrating at least one exhaust gas turbocharger into the exhaust gas aftertreatment system, the efficiency of the internal combustion engine can be increased.

• 1: eine schematisierte Darstellung eines ersten Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs;
• 2: eine schematisierte Darstellung eines zweiten Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs;
• 3: eine schematisierte Darstellung eines dritten Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs;
• 4: eine schematisierte Darstellung eines vierten Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs;
• 5: eine schematisierte Darstellung eines fünften Ausführungsbeispiels Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs;
• 6: eine schematisierte Darstellung eines weiteren Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs;
• 7: eine schematisierte Darstellung eines weiteren Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs; und
• 8: eine schematisierte Darstellung eines weiteren Abgasnachbehandlungssystems einer Brennkraftmaschine eines Kraftfahrzeugs.

Preferred developments of the invention result from the subclaims and the following description. This shows:

• 1 : a schematic representation of a first exhaust aftertreatment system of an internal combustion engine of a motor vehicle;
• 2 : a schematic representation of a second exhaust aftertreatment system of an internal combustion engine of a motor vehicle;
• 3 : a schematic representation of a third exhaust aftertreatment system of an internal combustion engine of a motor vehicle;
• 4 : a schematic representation of a fourth exhaust aftertreatment system of an internal combustion engine of a motor vehicle;
• 5 : a schematic representation of a fifth exemplary embodiment of the exhaust gas aftertreatment system of an internal combustion engine of a motor vehicle;
• 6 : a schematic representation of a further exhaust aftertreatment system of an internal combustion engine of a motor vehicle;
• 7 : a schematic representation of a further exhaust aftertreatment system of an internal combustion engine of a motor vehicle; and
• 8th : a schematic representation of another exhaust gas aftertreatment system of an internal combustion engine of a motor vehicle.

The present invention relates to an exhaust gas aftertreatment system of an internal combustion engine of a motor vehicle, wherein the internal combustion engine comprises at least one cylinder group 11, each with several cylinders 10.

Each cylinder group 11 is assigned an exhaust gas aftertreatment device 12 of the exhaust gas aftertreatment system, with exhaust gas from the cylinders 10 of the respective cylinder group 11 being able to be supplied to the exhaust gas aftertreatment device 12 assigned to the cylinder group 11 via at least one exhaust manifold 13 of the respective cylinder group 11.

Below are referenced 1 until 6 Exhaust gas aftertreatment systems described in detail, whereby 1 until 6 each show an exhaust aftertreatment system for an internal combustion engine, which includes a cylinder group 11 comprising three cylinders 10.

It should be noted at this point that the number of cylinders 10 per cylinder group 11 and the number of cylinder groups 11 can be varied.

It is therefore possible for two cylinder groups 11, each with three cylinders 10, to be present. Likewise, two cylinder groups 11, each with four cylinders 10, can be present.

Then, if there are several cylinder groups 11, each with several cylinders 10, the in 1 until 6 The assemblies shown are available separately for each cylinder group 11.

According to 1 is cylinder group 11, which is in 1 three cylinders 10, an exhaust gas aftertreatment device 12 is assigned, the exhaust gas from the cylinders 10 of the cylinder group 11 of the exhaust gas aftertreatment device 12 in 1 can be supplied via a single exhaust manifold 13.

The exhaust gas aftertreatment device 12 1 has an exhaust particulate filter 14 and a catalytic converter 15, which are connected in parallel to one another. Depending on the operating point of the internal combustion engine, exhaust gas from the cylinder group 11 can be conducted either completely via the exhaust particle filter 14 or partially via the exhaust particle filter 14 and partially via the catalytic converter 15.

According to 1 This is achieved in that a bypass line 16 branches off from the exhaust manifold 13 and is assigned a bypass valve 17. Then, when the bypass valve 17 is closed, all exhaust gas from the cylinders 10 of the cylinder group 11 is fed to the exhaust particulate filter 14 via the exhaust manifold 13 and passed over the same. Then, on the other hand, when the bypass valve 17 is opened, part of the exhaust gas is passed through Exhaust particle filter 14 and another part of the exhaust gas is passed over the catalytic converter 15.

How 1 shows, exhaust gas from the cylinders 10 of the cylinder bank 11 reaches the exhaust manifold 13 via an exhaust valve 18 of the cylinders 10 of the cylinder bank 11 and, depending on the operating point of the internal combustion engine, either exclusively into the area of the exhaust particulate filter 14 or partially into the area of the exhaust particulate filter 14 and partially in the area of the catalytic converter 15 connected parallel to the exhaust particle filter 14.

2 shows a further development of the exhaust aftertreatment system 1 , where in 2 the exhaust gas aftertreatment device 12, which is assigned to the cylinder group 11, comprises a catalytic converter 15 which surrounds an inner exhaust particulate filter 14 in an annular or concentric manner on the outside.

Such an exhaust aftertreatment device with an inner exhaust particulate filter 14 and an outer catalytic converter 15 surrounding the exhaust particulate filter 14 in a ring is referred to as a ring-parallel exhaust particulate filter catalytic converter.

As already stated, exhaust gas from the cylinders 10 of the cylinder group 11 can be conducted either completely via the exhaust particulate filter 14 or partially via the exhaust particulate filter 14 and partially via the catalytic converter 15, depending on the operating point of the internal combustion engine.

Then, when the operating point of the internal combustion engine is a warm-up of the internal combustion engine and/or a partial load of the internal combustion engine and/or a full load of the internal combustion engine in a lower speed range, the exhaust gas from the cylinders 10 of the cylinder group 11 can be conducted completely via the exhaust particulate filter 14.

Then, when the operating point of the internal combustion engine is full load of the internal combustion engine in a medium speed range of the same and / or full load of the internal combustion engine in an upper speed range of the same, the exhaust gas is in 1 and 2 When the bypass valve 17 is open, it can be routed partly via the exhaust particulate filter 14 and partly via the catalytic converter 15.

The exhaust particulate filter 14 is preferably a catalytically coated exhaust particulate filter, which is designed as a combined exhaust particulate filter and catalytic converter.

Shows another exhaust gas aftertreatment system for an internal combustion engine of a motor vehicle 3 , whereby the exhaust gas aftertreatment system 3 for the cylinder group 11 shown from the three cylinders 10 comprises several exhaust manifolds, namely a first exhaust manifold 13a, via which the cylinder 10 exhaust gas can be fed to the exhaust particle filter 14 of the exhaust gas aftertreatment device 12 from first exhaust valves 18a, and a second exhaust manifold 13b, via which starting from the second Exhaust valves 18b of the cylinder 10 exhaust gas can be fed to the catalytic converter 15, which is connected in parallel to the exhaust particulate filter 14.

In 3 A check valve 19 is assigned to the second exhaust manifold 13b. When the check valve 19 is closed, exhaust gas is supplied to the exhaust particulate filter 14 exclusively via the exhaust manifold 13a. When the check valve 19 is open, exhaust gas is passed through both exhaust manifolds 13a and 13b, in which case the exhaust gas from the cylinders 10 of the cylinder group 11 can then be fed or fed partly to the exhaust gas particle filter 14 via the exhaust manifold 13a and partly to the catalytic converter 15 via the exhaust manifold 13b.

4 shows a further development of the exhaust aftertreatment system 3 , where in 4 the cylinder group 11 is assigned an exhaust gas turbocharger 20. A turbine 21 and a compressor 22 are shown from the exhaust gas turbocharger 20. Exhaust gas from the cylinders 10 of the cylinder group 11 can be supplied to the turbine 21 of the exhaust gas turbocharger 10 via the first exhaust manifold 13a, the exhaust gas directed via the turbine 21 of the exhaust gas turbocharger 20 being able to be supplied to the exhaust gas particle filter 14 after passing through the turbine 21. Exhaust gas, which is therefore guided via the exhaust gas turbocharger 20, namely the turbine 21 of the same, reaches from the turbine 21 of the exhaust gas turbocharger 20 exclusively into the area of the exhaust gas particle filter 14 and not into the area of the catalytic converter 15 connected in parallel to the exhaust gas particle filter 14. How 4 can also be removed, exhaust gas, which is derived from the cylinders 10 of the cylinder group 11 via the exhaust manifold 13a and guided in the direction of the turbine 21 of the exhaust gas turbocharger 20, can be guided past the turbine 21 of the exhaust gas turbocharger 20 via a bypass valve 23 and the catalytic converter 15 the exhaust gas aftertreatment device 12, which is connected in parallel to the exhaust gas particle filter 14, bypassing the turbine 21 of the exhaust gas turbocharger 10. This bypass valve 23 is also referred to as a wastegate.

Also in 3 and 4 The check valve 19, which is assigned to the second exhaust manifold 13b, is opened or closed depending on the operating point of the internal combustion engine. Then, when the check valve 19 is closed, all exhaust gas is routed via the exhaust manifold 13a. Then when the check valve 19 depends on the When the operating point of the internal combustion engine is open, part of the exhaust gas is passed through the exhaust manifold 13a and part of the exhaust gas is passed through the exhaust manifold 13b. where in 4 Depending on the operating point of the exhaust gas turbocharger 20, the bypass valve 23 is opened or closed.

5 and 6 show further exhaust aftertreatment systems, the exhaust aftertreatment system being the 5 basically the exhaust gas aftertreatment system 3 and the exhaust gas aftertreatment system 6 basically the exhaust gas aftertreatment system 4 corresponds. In the exhaust gas aftertreatment systems 5 until 6 However, no check valve 19 is assigned to the second exhaust manifold 13b, rather the exhaust valves 18b of the cylinders 10 of the cylinder group 11 can be switched on and off depending on the operating point of the internal combustion engine.

Then, when the exhaust valves 18b are switched off, only the exhaust valves 18a are active and exhaust gas is passed exclusively via the exhaust particulate filter and, if necessary, via the turbine 21 of the exhaust gas turbocharger 10.

Then, on the other hand, when the exhaust valves 18b of the cylinders 10 of the cylinder group 11 are switched on, exhaust gas is passed partly via the exhaust manifold 13a and partly via the exhaust manifold 13b and therefore partly via the particle filter 14 and partly via the catalytic converter 15, whereby in 6 Exhaust gas, which is conducted via the exhaust manifold 13a, is also conducted via the turbine 21 of the exhaust gas turbocharger 20, namely depending on the opening position of the bypass valve 23.

Show more exhaust aftertreatment systems 7 and 8th . In 7 and 8th There are two exhaust manifolds 13c and 13d and one exhaust gas turbocharger 20 each. Exhaust gas from first exhaust valves 18a of the cylinders 10 can be guided via a first exhaust manifold 13c and exhaust gas from second exhaust valves 18b of the cylinders 10 can be guided to the turbine 21 of the respective exhaust gas turbocharger 20 via a second exhaust manifold 13d. Furthermore, there is a bypass valve 23 in each case. Exhaust gas, which is passed over the respective turbine 21 of the respective exhaust gas turbocharger 20, is then passed over the catalytic converter 15. Exhaust gas, which is guided past the respective turbine 21 of the respective exhaust gas turbocharger 20 via the bypass valve 23, is then guided via the exhaust gas particle filter 14. When the bypass valve 23 is fully open, the exhaust gas guided via the first exhaust manifold 13c and the second exhaust manifold 13d can be conducted completely via the exhaust gas particle filter 14, bypassing the exhaust gas turbocharger 20. When the bypass valve 23 is partially closed, the exhaust gas can be conducted partly bypassing the exhaust gas turbocharger 20 via the exhaust gas particle filter 14 and partly via the turbine 21 of the exhaust gas turbocharger 20 and subsequently via the catalytic converter 15.

7 and 8th differ in terms of the geometric arrangement of the exhaust particulate filter 14 and catalytic converter 15. In 8th In turn, an exhaust gas aftertreatment device with an inner exhaust particulate filter 14 and an outer catalytic converter 15 surrounding the exhaust particulate filter 14 in a ring is present.

In order to reduce exhaust particle emissions, it is therefore possible to conduct exhaust gas exclusively via the exhaust particle filter 14 when the internal combustion engine is warming up, at partial load and at full load in a lower speed range.

When the internal combustion engine is at full load in a medium and upper speed range, exhaust gas is partly routed via the exhaust particle filter 14 and partly via the catalytic converter 15 connected in parallel to the exhaust particle filter 14. The exhaust particulate filter 15 is preferably catalytically coated so that it can also be used as a catalyst.

Preferably, each cylinder group 11 of the internal combustion engine is assigned two separate exhaust manifolds, which communicate with different exhaust valves and supply the exhaust gas to either the exhaust particulate filter 14 or the catalytic converter 15. Depending on the operating point of the internal combustion engine, exhaust gas is passed exclusively via one of the exhaust manifolds 13a or via both exhaust manifolds 13a and 13b, so that depending on the operating point of the internal combustion engine, either the exhaust gas is passed completely via the exhaust gas particle filter 14 or partially via the exhaust gas particle filter 14 and the catalytic converter connected in parallel to the exhaust gas particle filter 14 15 is directed.

According to an advantageous development, the catalytic converter 15, which is connected in parallel to the exhaust particulate filter 14, is designed such that it surrounds the exhaust particulate filter 14 concentrically or annularly on the radial outside.

Reference symbol list

10

cylinder

11

Cylinder group

12

Exhaust gas aftertreatment device

13, 13a, 13b, 13c, 13d

exhaust manifold

14

Exhaust particulate filter

15

catalyst

16

Bypass line

17

Bypass valve

18, 18a, 18b

outlet valve

19

Check valve

20

Exhaust catalytic converter

21

turbine

22

compressor

23

Bypass valve

Claims (12)

Exhaust gas aftertreatment system for an internal combustion engine with at least one cylinder group comprising several cylinders, wherein exhaust gas from the cylinders of the or each cylinder group can be fed via at least one exhaust manifold to an exhaust gas aftertreatment device assigned to the respective cylinder group, wherein the exhaust gas aftertreatment device (12) comprises an exhaust particulate filter (14) and a catalytic converter (15) connected in parallel to the exhaust particulate filter (14), the exhaust gas of the respective cylinder group (11) depending on the operating point of the internal combustion engine either completely via the exhaust particulate filter (14) or partially can be conducted via the exhaust particle filter (14) and partly via the catalytic converter (15), wherein the or each cylinder group is assigned an exhaust gas turbocharger (20) in such a way that the exhaust gas from the cylinders (10), which can be conducted via the exhaust particle filter (14) of the respective exhaust gas aftertreatment device (12), starting from the cylinders (10) initially via a The turbine (21) of the exhaust gas turbocharger (20) and after passing through the turbine (21) of the exhaust gas turbocharger (20) can be guided over the exhaust gas particle filter (14), wherein the exhaust gas turbocharger (20) is assigned a bypass valve (23), via which exhaust gas can be conducted via the catalytic converter (15) of the respective exhaust gas aftertreatment device (12), bypassing the exhaust gas turbocharger (20) and bypassing the exhaust particulate filter (14). Exhaust gas aftertreatment system Claim 1 , characterized in that the exhaust gas of the respective cylinder group (11) can be conducted completely via the exhaust gas particle filter (14) when the internal combustion engine is warming up and / or when the internal combustion engine is at partial load and / or when the internal combustion engine is at full load in a lower speed range. Exhaust gas aftertreatment system Claim 1 or 2 , characterized in that the exhaust gas of the respective cylinder group (11) can be conducted partly via the exhaust particle filter (14) and partly via the catalytic converter (15) when the internal combustion engine is at full load in a medium speed range and/or when the internal combustion engine is at full load in an upper speed range is. Exhaust gas aftertreatment system according to one of the Claims 1 until 3 , characterized in that the exhaust particulate filter (14) of the respective exhaust gas aftertreatment device (12) is designed as a catalytically coated exhaust particulate filter, which is designed as a combined exhaust particulate filter and catalytic converter. Exhaust gas aftertreatment system according to one of the Claims 1 until 4 , characterized in that the respective exhaust gas aftertreatment device (12) is designed such that the catalytic converter (15) of the same surrounds the inner exhaust particulate filter (14) of the same on the outside in a ring shape. Exhaust gas aftertreatment system according to one of the Claims 1 until 5 , characterized in that the respective cylinder group (12) is assigned a plurality of exhaust manifolds (13a, 13b), a first exhaust manifold (13a) from the first exhaust valves (18a) of the cylinders (10) of the cylinder group to the exhaust particulate filter (14) and a second exhaust manifold (13b) from second exhaust valves (18b) of the cylinders (10) of the cylinder group leads to the catalytic converter (15). Exhaust gas aftertreatment system Claim 6 , characterized in that the second exhaust valves (18b) are designed to be switched on and off depending on the operating point of the internal combustion engine, or the second exhaust manifold (13b) is assigned a check valve (19), which is opened or closed depending on the operating point of the internal combustion engine. Exhaust gas aftertreatment system for an internal combustion engine with at least one cylinder group comprising several cylinders, wherein exhaust gas from the cylinders of the or each cylinder group can be fed via at least one exhaust manifold in each case to an exhaust gas aftertreatment device assigned to the respective cylinder group, the exhaust gas aftertreatment device (12) having an exhaust gas particle filter (14) and one parallel to the Exhaust particle filter (14) connected catalyst (15), wherein the exhaust gas of the respective cylinder group (11) depending on the operating point of the internal combustion engine either completely via the exhaust particle filter (14) or partially via the exhaust particle filter (14) and partially via the catalytic converter (15). is, with the respective cylinder group (12) having several Exhaust manifold (13c, 13d) are assigned, with a first exhaust manifold (13c) from first exhaust valves (18a) and a second exhaust manifold (13d) from second exhaust valves (18b) of the cylinder (10) to a turbine (21) of an exhaust gas turbocharger (20 ). (14) and with the bypass valve (23) partially closed, bypassing the exhaust gas turbocharger (20), it can be conducted partly via the exhaust gas particle filter (14) and partly via the turbine (21) of the exhaust gas turbocharger (20) and subsequently via the catalytic converter (15). Exhaust gas aftertreatment system Claim 8 , characterized in that the exhaust gas of the respective cylinder group (11) can be conducted completely via the exhaust gas particle filter (14) when the internal combustion engine is warming up and/or when the internal combustion engine is at partial load and/or when the internal combustion engine is at full load in a lower speed range. Exhaust gas aftertreatment system Claim 8 or 9 , characterized in that the exhaust gas of the respective cylinder group (11) can be conducted partly via the exhaust particle filter (14) and partly via the catalytic converter (15) when the internal combustion engine is at full load in a medium speed range and/or when the internal combustion engine is at full load in an upper speed range is. Exhaust gas aftertreatment system according to one of the Claims 8 until 10 , characterized in that the exhaust particulate filter (14) of the respective exhaust gas aftertreatment device (12) is designed as a catalytically coated exhaust particulate filter, which is designed as a combined exhaust particulate filter and catalytic converter. Exhaust gas aftertreatment system according to one of the Claims 8 until 11 , characterized in that the respective exhaust gas aftertreatment device (12) is designed such that the catalytic converter (15) of the same surrounds the inner exhaust particulate filter (14) of the same on the outside in a ring shape.

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