EP3569837B1 - Vehicle with exhaust gas line assembly - Google Patents

Description

The invention relates to an exhaust line arrangement for an, in particular an agricultural, vehicle according to the preamble of claim 1.

Vehicles such as tractors or self-propelled harvesting machines are usually equipped with an internal combustion engine, which is used to provide power for the traction drive and other functions. A diesel engine is usually used as the internal combustion engine, the exhaust gases of which are passed from the internal combustion engine into the environment via an exhaust system which has a plurality of components and which contain a number of pollutants. In order to reduce the emission of pollutants, the exhaust gases in modern vehicles are cleaned by devices for exhaust gas aftertreatment before they are released into the environment, the exhaust gas aftertreatment being integrated into the exhaust system and being part of it. The exhaust gas aftertreatment usually takes place in several steps and by means of different components of the exhaust system and is monitored, controlled and regulated by a large number of sensors and sensor devices. After a first oxidation catalytic converter, the exhaust gases can be passed through a diesel particulate filter (DPF) to reduce the number of particles in the exhaust gases. Furthermore, a concentration of nitrogen oxides (NOx) contained in the exhaust gases can be reduced by a selective catalytic reduction (SCR) in a corresponding catalytic converter. For this purpose, a substance with a direct reducing effect, for example a urea solution, is supplied to the exhaust gases, which only releases the required reducing substances in the exhaust gas. The actual selective catalytic reduction takes place in a so-called SCR catalytic converter downstream of the urea metering.

This complex aftertreatment of the exhaust gases has the consequence that the exhaust system becomes more complex due to an increasing number of components and more space is required for the installation of the components. An improved use of the installation space is, for example, from the WO 2010/069806 A1 known, in which some components of an exhaust line outside the engine compartment on the side of the Machine, for example, are arranged in front of an A-pillar of a driver's cab. However, this can result not only in a restriction of the view of an operator of the machine, but also in problems due to the heat radiated from the exhaust system, which is particularly important for the necessary sensors and sensor devices. Furthermore, several components of the exhaust gas line can be fastened to one another in order to enable a space-saving arrangement, although mechanical damage to one or more components or sensors can occur.

Other vehicles with an exhaust system are out WO 2014/084858 A1 , EP 2 944 515 A1 , EP 2 187 013 A2 as JP 2010 11 6001 A known.

It is therefore an object of the present invention to provide an exhaust line arrangement which enables an improved arrangement of components of the exhaust line with regard to the required installation space and protection from mechanical and / or thermal influences, as well as ensuring simplified assembly and / or maintenance of the components.

The object is achieved by an exhaust gas line arrangement according to the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

A vehicle, in particular an agricultural work machine, with at least one exhaust system arrangement with an internal combustion engine, comprises at least one first exhaust system component, the first exhaust system component being arranged outside an engine compartment of the vehicle, in particular essentially vertically, a housing which encloses at least the first exhaust system component on the outside , a support element fixed on the vehicle side for receiving at least the first exhaust line component and / or the housing, and an exhaust gas connector arranged on the vehicle side on the first exhaust line component for conducting the exhaust gases from the internal combustion engine to the first exhaust line component. According to the invention, the exhaust line arrangement has at least one first sensor device which is at least partially arranged within the support element.

Exhaust gases from an internal combustion engine of the vehicle first flow through the at least first exhaust line component and can then flow through a second exhaust line component. The first exhaust line component is at least partially enveloped on the outside by a housing which has cooling openings, for example in the form of a plurality of passages. The first exhaust line component can be arranged on a support element fixed on the vehicle side. The support element is arranged on the vehicle side of the first and second exhaust line components and can support them. The support element can be designed, for example, angled, wherein the support element can be arranged essentially horizontally on the vehicle side and essentially vertically on the exhaust line component side, in particular outside the engine compartment. The support element can be designed as a cladding of a part of the exhaust line arrangement, for example an exhaust gas connector, wherein the exhaust gas connector to the exhaust line can be arranged between the first exhaust gas flow component and the internal combustion engine. The support element enables simple assembly of the support structure and the exhaust line components outside the engine compartment of the vehicle and their secure mounting. At least one first sensor device for monitoring, controlling and / or regulating the exhaust gas cleaning can be arranged within the housing and / or the support element. This has the advantage that the at least first sensor device only requires little installation space and can be installed without impairing the operator's view. In addition, the sensor device is protected from mechanical and / or thermal influences by the housing and / or the support element. In addition, simplified assembly and / or maintenance can be guaranteed at these easily accessible locations outside the vehicle.

According to the invention, at least one fastening element is provided for receiving the at least one first sensor device, which is arranged on the inside of the support element.

In a preferred embodiment of the invention, at least one fastening element is provided for receiving a further first sensor device, which is arranged on the first exhaust line component, the exhaust gas nozzle, and / or on the inside of the housing. The arrangement of at least one The first sensor device on a fastening element enables one or more sensor units to be pre-assembled, as a result of which assembly on the vehicle can be simplified and accelerated.
In a particularly preferred embodiment of the invention, the fastening element is designed and arranged in such a way that the at least one first sensor device is shielded from heat, in particular radiant heat, from the at least first exhaust gas line component and / or the exhaust gas connector. A sensor device can be arranged radially on the outside of the fastening element, so that the fastening element can be arranged between the sensor device and the heat source, for example the first exhaust line component and / or the exhaust gas connector. The fastening material can for example consist of one or more materials, for example metal and / or ceramic, wherein one or more materials can be arranged in layers, for example. As a result, the fastening element can act like a heat shield for the at least first sensor device and thereby prevent damage from thermal loads.

In a further embodiment of the invention, the fastening element is essentially flat and / or curved, in particular on the inside, following the shape of the housing, the support element, the first exhaust line component and / or the exhaust connection. As a result, the geometric shape of the fastening element can be better adapted to the installation space and the required shielding effect, and the protection of the sensor device can thus be improved.

In a particularly preferred embodiment of the invention, the fastening element has at least one spacer for the spaced assembly of the at least first sensor device. A sensor device can in each case be fastened to the fastening element by means of at least one spacer, with a gap being formed between the fastening element and the at least first sensor device, which, for example, enables air to circulate between them and thus further improves thermal protection of the sensor device.

In a particularly preferred embodiment of the invention, the housing and / or the support element has at least one opening for cooling the at least first Sensor device. An improved supply of cooling air and / or a better discharge of heated exhaust air and thus improved cooling of a sensor device can be ensured via the at least one opening. By arranging an opening on the bottom side, for example on the bottom side in the support element, the at least first sensor device can be cooled by natural convection within the support element and / or the housing. An especially opposite arrangement of two or more openings is also conceivable, which enables an improvement in the cooling air flow and thus the cooling of a sensor device. Furthermore, an opening in the housing and / or the support element offers the advantage of simplified assembly and maintenance of a sensor device.

In a further particularly preferred embodiment of the invention, a lattice structure is provided for the air-permeable covering of an opening. This lattice structure can consist, for example, of cooling openings in a flat structure and can be releasably arranged at an opening.

In a further embodiment of the invention, an opening and / or a lattice structure is formed in a cover element that can be detachably arranged on the housing and / or support element. A cover element can cover a larger opening in the support element and / or the housing, with a cover element with or without an opening and / or lattice structure being able to be mounted depending on the sensor devices and / or cooling requirement. This modularization enables simplified and inexpensive production.

In a further preferred embodiment of the invention, a particularly first exhaust line component is an exhaust pipe section, a silencer, a diesel particulate filter, an oxidation catalytic converter, a catalytic converter for selective reduction (SCR), or a metering module for a reducing auxiliary. An exhaust line component can be any component of an exhaust line, in particular a component through which exhaust gases flow or which is used for exhaust gas aftertreatment. The reducing excipient, which via the Dosing module can be introduced into the exhaust gas flow is, for example, a urea solution.

The invention further relates to a vehicle which is designed and developed as an agricultural work machine as above.

The invention is explained in more detail below on the basis of exemplary embodiments.

This also results in advantageous effects and effects.

Figur 1

einen Traktor in schematischer Ansicht von der Seite mit einer erfindungsgemäßen Abgasstranganordnung;

Figur 2

eine geschnittene, schematische Darstellung eines Tragelementes einer Abgasstranganordnung;

Figur 3

eine schematische Ansicht eines Befestigungselementes einer Abgasstranganordnung mit einer ersten und einer zweiten Sensoreinrichtung; und

Figur 4

eine detaillierte schematische Darstellung des Befestigungselementes aus Figur 3.

In the figures shows:

Figure 1

a tractor in a schematic view from the side with an exhaust line arrangement according to the invention;

Figure 2

a sectional, schematic representation of a support element of an exhaust line arrangement;

Figure 3

a schematic view of a fastening element of an exhaust line arrangement with a first and a second sensor device; and

Figure 4

a detailed schematic representation of the fastener Figure 3 .

In Figure 1 shows an agricultural vehicle 10 in the form of a tractor in a schematic view from the side. The tractor 10 has an internal combustion engine 12 in an engine compartment 14, which is used to drive the tractor 10 in a manner which is known in itself and therefore does not need to be explained further. In addition, the internal combustion engine 12 can be used in a manner known per se to drive working and auxiliary units, such as working hydraulics, pneumatics, etc., of the tractor 10. During the operation of the internal combustion engine 12, exhaust gases arise which are emitted to the environment via an exhaust line arrangement 16, the exhaust gases being post-treated in order to reduce environmental pollution.

The exhaust line arrangement 16 forwards the exhaust gases from the internal combustion engine 12 to the environment, the exhaust gases flowing through a number of components of the exhaust line arrangement 16. The exhaust line arrangement 16 is at least partially arranged outside the tractor 10, with the part of the exhaust line arrangement 16 arranged outside the engine compartment 14 being arranged essentially vertically and laterally in front of a driver's cab 18 in the exemplary embodiment shown. The exhaust line arrangement 16 has a first exhaust line component 20, for example a so-called SCR catalytic converter, through which the exhaust gases from the internal combustion engine 12 flow before they leave the exhaust line arrangement 16 through a second exhaust line component 22, for example an exhaust with a silencer. The first exhaust line component 20 and the second exhaust line component 22 are arranged essentially coaxially to one another along a longitudinal axis 24, the second exhaust line component 22 being arranged in the vertical direction above the first exhaust line component 20.

The first exhaust line component 20 is attached to a support element 26 fixed on the vehicle side, the support element 26 being angular and essentially bearing the entire weight of the first exhaust line component 20. The second exhaust line component 22, which is arranged above the first exhaust line component 20, is fastened at the top to a housing 28 which envelops the first exhaust line component 20 on the outside. The housing 28 is designed in such a way that it takes up essentially the entire weight of the second exhaust line component 22 and encompasses the first exhaust line component 20 on the outside and essentially free of vertical loads. At a lower end, the housing 28 is arranged on the support element 26, for example in an annular manner. The housing 28 is arranged at a distance from the first exhaust line component 20, whereby an exchange of air and thus a cooling of the first exhaust line component 20 is made possible. To improve the cooling performance, the housing 28 can have a large number of cooling openings 30 on the circumference. On the bottom side, the housing 28 is supported and fastened on the support element 26. The support element 26 is designed in the form of an angle which surrounds an exhaust pipe 36 through which the exhaust gases from the internal combustion engine 12 to the first exhaust line component 20, the catalytic converter, are conducted. The support element 26 is designed essentially horizontally on the vehicle side and is arranged essentially vertically on the support structure side.

In a conventional exhaust gas aftertreatment, the exhaust gases from the internal combustion engine 12 are first passed through a diesel oxidation catalytic converter and a diesel particulate filter (DPF) before an auxiliary substance, usually urea, is sprayed into the metering module to reduce part of the exhaust gases. Subsequently, a catalytic converter for a selective reduction (SCR) 20 is arranged, in which a Part of the exhaust gases are reduced, the nitrogen oxides (NOx) being reduced before the exhaust gases are released into the environment via a silencer. In this case, at least one first sensor device 32 is used to monitor, control and regulate the exhaust gas aftertreatment.

According to the invention, the in Figure 2 The illustrated at least one first sensor device 32 is arranged within the support element 26. This serves to monitor, control and / or regulate the exhaust line arrangement 16, in particular its exhaust gas aftertreatment components. An opening 34 is formed in the support element 26 on the outside, adjacent to the first sensor device 32, on a side facing away from the vehicle. This opening 34 enables a better supply of cooling air to the first sensor device 32. The outer opening 34 is supplemented by an opening 34 opposite it on a side facing the vehicle, whereby an air flow for cooling the sensor device 32 can be further improved. The openings 34 are protected against the ingress of dirt by lattice structures 52, which are air-permeable. The opening 34 arranged on the inside, on a side facing the vehicle 10, is formed in a cover element 50 which is detachably connected to the support element 26. The lattice structure 52 is formed in one piece with the cover element 50.

Inside the support element 26 ( Fig. 3 ) a fastening element 38 is provided, which is fastened to an upper region of the support element 26 and serves to accommodate at least one sensor device 32, 44. The fastening element 38 is detachably fastened to a mounting element 62. The fastening element 38 is arranged essentially vertically within the support element 26. The first sensor device 32 is detachably fastened to the fastening element 38 and is arranged on the fastening element 38 on a side facing away from the first exhaust line component 20 and / or exhaust gas connector 36. The fastening element 38 acts like a heat shield against the heat given off or radiated by the first exhaust line component 20 and / or the exhaust pipe 36, which can have a temperature of approx. 200 ° C. during operation of the exhaust line arrangement 16, for example. The first sensor device 32 is connected to a first sensor 42, for example a temperature sensor, via a first sensor line 40. connected, which is arranged directly on the first exhaust line component 20. A second sensor device 44 is connected to a second sensor 48 via a second sensor line 46. The second sensor 48 can be a nitrogen oxide sensor, for example, which can measure a nitrogen oxide / NOx concentration, in particular on the output side of the first exhaust line component 20, an SCR catalytic converter, in order to improve the regulation of the exhaust gas purification.

The first sensor device 32 and the second sensor device 44 are arranged adjacent to one another on a side of the fastening element 38 facing away from the first exhaust gas line component 20. In order to achieve better protection against thermal radiation, for example of the first exhaust line component 20, the sensor devices 32, 44 are fastened to the fastening element 38 via spacers 58 at a distance from the latter. This enables cooling air to circulate between the sensor devices 32, 44 and the fastening element 38, as a result of which additional heat can be dissipated. The spacers 56 can be designed in the form of washers or can be designed in one piece with the fastening element 38. Spacers 56 formed in one piece with the fastening element 38 can be designed in the form of projections, in particular with internal threads, in the fastening element 38. A detachable connection can be made by means of fastening elements 56 in the form of screws. The fastening element 38 has in an upper region for connection to the support element 26 a bevel 54 which is positively and / or detachably connected to the support element 26 by means of connecting means 56.

In Figure 4 a substantially flat fastening element 38 is shown in the form of a metal sheet, on which a first sensor device 32 and a second sensor device 44 are arranged next to one another on one side. The first sensor device 32 is arranged on the fastening element 38 by means of a band-shaped holder 60 wrapping around it. The first sensor device 32 is fastened to the fastening element 38 at a distance by means of fastening means 56 via the spacers 56 and the holder 60. The second sensor device 44 is arranged on the fastening element 38 by means of two fastening means 56. The sensor devices 32, 44 are each connected to their respective sensors (not shown) via a first sensor line 40 and a second sensor line 4. The Control devices 32, 44 also each have a plug connection via which they can be connected, for example, to a central control device (not shown).

List of reference symbols

10

vehicle

12th

Internal combustion engine

14th

Engine compartment

16

Exhaust line arrangement

18th

Driver's cab

20th

First exhaust line component

22nd

Second exhaust line component

24

Longitudinal axis

26th

Support element

28

casing

30th

Cooling vents

32

first sensor device

34

opening

36

Exhaust pipe

38

Fastener

40

first sensor line

42

first sensor

44

second sensor device

46

second sensor line

48

second sensor

50

Cover element

52

Lattice structure

54

Chamfer

56

Fasteners

58

Spacers

60

bracket

62

Mounting element

Claims (10)

1. A vehicle (10), in particular an agricultural working machine, having at least one exhaust gas system assembly (16), with an internal combustion engine (12), with at least one first exhaust gas system component (20), wherein the first exhaust gas system component (20) is disposed outside an engine compartment (4) of the vehicle (10), in particular substantially vertically, with a housing (28) which surrounds the exterior of at least the first exhaust gas system component (20), with a support element (26) immobilized on the vehicle side in order to receive at least the first exhaust gas system component (20) and/or the housing (28), and with an exhaust gas pipe (36) disposed on the first exhaust gas system component (20) on the vehicle side for guiding the exhaust gases from the internal combustion engine (12) to the first exhaust gas system component (20), wherein the exhaust gas system assembly (16) has at least one first sensor device (32) at least part of which is disposed inside the support element (26), characterized in that
   at least one fastening element (38) for receiving the at least one first sensor device (32) is provided and which is disposed in the interior of the support element (26).
2. The vehicle (10) according to claim 1, characterized in that at least one fastening element (38) is provided for receiving a further first sensor device (32), which is disposed on the first exhaust gas system component (20), the exhaust gas pipe (36) and/or on the inside of the housing (28).
3. The vehicle (10) according to claim 1 or claim 2, characterized in that the fastening element (38) is constructed and disposed in a manner such that the at least one first sensor device (32) is shielded from heat, in particular radiant heat, from the at least one first exhaust gas system component (20) and/or the exhaust gas pipe (36).
4. The vehicle (10) according to claim 2 or claim 3, characterized in that the fastening element (38) is substantially flat and/or curved in configuration, following the contours of the housing (28), the support element (26), the first exhaust gas system component (20) and/or the exhaust gas pipe (36).
5. The vehicle (10) according to one of the preceding claims, characterized in that the fastening element (38) has at least one spacer (58) for mounting the at least one sensor device (32) with a spacing.
6. The vehicle (10) according to one of claims 2 to 5, characterized in that the housing (28) and/or the support element (26) has at least one opening (34) for cooling the at least one first sensor device (32).
7. The vehicle (10) according to claim 6, characterized in that a screen structure (52) is provided in order to cover an opening (34) in an air-permeable manner.
8. The vehicle (10) according to claim 6 or claim 7, characterized in that an opening (34) and/or a screen structure (52) is provided in a cover element (50) which can be detachably disposed on the housing (28) and/or the support element (26).
9. The vehicle (10) according to one of the preceding claims, characterized in that a, in particular first, exhaust gas system component (20) is an exhaust gas pipe section, a silencer, a diesel particle filter, an oxidizing catalytic converter, a selective catalytic reduction (SCR) catalytic converter, or a dosing module for a reducing additive.
10. The vehicle as claimed in one of the preceding claims, characterized in that the vehicle is configured as an agricultural working machine.

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