EP3569837A1 - Exhaust gas line assembly - Google Patents

Abstract

An exhaust gas arrangement (16) for a, in particular agricultural, vehicle with an internal combustion engine (12) comprises at least a first exhaust gas system component (20), the first exhaust gas system component (20) outside an engine compartment (14) of the vehicle (10), in particular substantially vertically , A housing (28) which surrounds at least the first exhaust gas line component (20) on the outside, a vehicle side fixed support member (26) for receiving at least the first exhaust gas component (20) and / or the housing (28), and a vehicle side the first exhaust gas line component (20) arranged exhaust nozzle (36) for conducting the exhaust gases from the internal combustion engine (12) to the first exhaust gas line component (20). According to the invention, the exhaust gas arrangement (16) has at least one first sensor device (32), which is arranged at least partially within the housing (28) and / or the support element (26).

Description

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

Vehicles such as tractors or self-propelled harvesters are usually equipped with an internal combustion engine that provides power to the propulsion system and other functions. As a combustion engine, a diesel engine is usually used, the exhaust gases are passed through an exhaust line, which has a plurality of components, from the engine into the environment and containing a number of pollutants. In order to reduce the emission of pollutants, in modern vehicles, the exhaust gases are cleaned by exhaust after-treatment devices before they are released into the environment, the exhaust aftertreatment integrated into the exhaust line and is part of it. The exhaust aftertreatment is usually carried out in several steps and by means of different components of the exhaust system and is monitored, controlled and regulated by a variety of sensors and sensor devices. For example, after a first oxidation catalyst, the exhaust gases may be passed through a diesel particulate filter (DPF) to reduce the number of particulates 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 catalyst. For this purpose, the exhaust gases an immediate reducing substance, for example, a urea solution, fed, which releases the required reducing substances only in the exhaust gas. The actual selective catalytic reduction takes place in a so-called SCR catalyst downstream of the urea dosing.

This costly aftertreatment of the exhaust gases has the consequence that the exhaust gas train becomes more complex due to an increasing number of components and more installation space is required for the installation of the components. An improved use of space is for example from the WO 2016/069806 A1 known in which some components of a Abgasstranges outside the engine compartment laterally on the Machine, for example, in front of an A-pillar of a cab, are arranged. However, this can not only lead to a limitation of the view of an operator of the machine, but also to problems due to the radiated heat from the exhaust line, which is particularly important for the necessary sensors and sensor devices. Furthermore, a plurality of components of the exhaust system can be fastened together to allow a space-saving arrangement, but it can lead to mechanical damage to one or more components or sensors.

It is therefore an object of the present invention to provide an exhaust gas arrangement, which allows an improved arrangement of components of the exhaust line with regard to the required installation space and a protection against mechanical and / or thermal influences, and ensures a simplified assembly and / or maintenance of the components.

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

An exhaust gas arrangement for a, in particular agricultural, vehicle with an internal combustion engine comprises at least a first exhaust gas component, wherein the first exhaust gas component outside of an engine compartment of the vehicle, in particular substantially vertically disposed, a housing which surrounds at least the first exhaust gas component on the outside, a vehicle side fixed support member for receiving at least the first exhaust gas component and / or the housing, and a vehicle side arranged on the first exhaust gas component exhaust nozzle for conducting the exhaust gases from the engine to the first exhaust gas component. According to the invention, the exhaust gas arrangement has at least one first sensor device, which is arranged at least partially within the housing and / or the support element.

Exhaust gases of an internal combustion engine of the vehicle first flow through the at least first exhaust gas system component and can then flow through a second exhaust gas system component. The first exhaust gas component is included at least partially on the outside surrounded by a housing having cooling holes, for example in the form of a plurality of passages. The first exhaust gas component may be arranged on a support element fixed to the vehicle. The support element is arranged on the vehicle side of the first and the second exhaust gas system component and can support it. The support member may be performed, for example, angled, the support member on the vehicle side substantially horizontally and exhaust gas component side, in particular outside the engine compartment, may be arranged substantially vertically. The support member may be formed as a panel of a part of the exhaust system, for example, an exhaust port, wherein the exhaust port to the exhaust pipe between the first exhaust gas flow component and the internal combustion engine may be arranged. By the support member, a simple mounting of the support structure and the exhaust gas system components outside of the engine compartment of the vehicle and their secure mounting can be made possible. At least one first sensor device for monitoring, controlling and / or regulating the exhaust gas purification can be arranged within the housing and / or the support element. This has the advantage that the at least first sensor device has only a small space requirement and can be mounted without visual impairment of the operator. In addition, the sensor device is protected by the housing and / or the support element from mechanical and / or thermal influences. In addition, a simplified installation and / or maintenance can be ensured at these easily accessible locations outside of the vehicle.

In a preferred embodiment of the invention, at least one fastening element is provided for receiving the at least one first sensor device, which is arranged on the first exhaust gas line component, the exhaust nozzle, on the inside on the housing and / or on the inside on the support element. The arrangement of at least one first sensor device on a fastening element allows a pre-assembly of one or more sensor units, whereby the mounting on the vehicle can be simplified and accelerated.

In a particularly preferred embodiment of the invention, the fastening element is designed and arranged such that the at least one first sensor device with respect to a heat, in particular radiant heat, the is shielded at least first exhaust gas component and / or the exhaust port. A sensor device may be arranged radially on the outside of the fastening element, so that the fastening element between the sensor device and heat source, for example, the first exhaust gas component and / or the exhaust nozzle, may be arranged. The fastening material may for example consist of one or more materials, for example metal and / or ceramic, wherein one or more materials may be arranged, for example, in layers. As a result, the fastening element can act as a heat shield for the at least first sensor device and thereby avoid damage due to thermal loads.

In a further embodiment of the invention, the fastener is substantially flat and / or curved, in particular inside, the shape of the housing, the support element, the first exhaust gas component and / or the exhaust nozzle following formed. In this way, the geometric shape of the fastener can be better adapted to the space and the required shielding and thus the protection of the sensor device can be improved.

In a particularly preferred embodiment of the invention, the fastening element has at least one spacer for the spaced mounting 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, wherein a gap is formed between the fastening element and the at least first sensor device, which, for example, permits air circulation 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 means of a bottom-side arrangement of an opening, for example, on the bottom side in the support element, cooling of the at least first sensor device can take place by natural convection within the support element and / or the housing. It is also conceivable one in particular opposite arrangement of two or more openings, which allows an improvement of 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 a simplified installation and maintenance of a sensor device.

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

In a further embodiment of the invention, an opening and / or a grid structure is formed in a cover element which can be detachably arranged on the housing and / or support element. In this case, a cover element can cover a larger opening in the support element and / or the housing, wherein a cover element with or without opening and / or lattice structure can be mounted after equipped sensor devices and / or cooling requirements. This modularization allows a simplified and cost-effective production.

In a further preferred embodiment of the invention, one, in particular first, exhaust gas component is an exhaust pipe section, a silencer, a diesel particulate filter, an oxidation catalyst, a selective reduction catalyst (SCR), or a dosing module for a reducing excipient. An exhaust gas component can be any component of an exhaust system, in particular a component through which exhaust gases flow or which serves for exhaust gas aftertreatment. The reducing assistant, which can be introduced via the dosing in the exhaust stream, for example, is a urea solution.

The invention further relates to a vehicle, in particular an agricultural work machine, with at least one exhaust gas duct arrangement, which is formed and further developed as above

The invention will be explained in more detail with reference to 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:

FIG. 1

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

FIG. 2

a sectional schematic representation of a support element of a Abgasstranganordnung;

FIG. 3

a schematic view of a fastening element of a Abgasstranganordnung with a first and a second sensor device; and

FIG. 4

a detailed schematic representation of the fastener from FIG. 3 ,

In FIG. 1 an agricultural vehicle 10 in the form of a tractor is shown in schematic side view. The tractor 10 has an internal combustion engine 12 in an engine compartment 14, which serves to drive the tractor 10 in a known manner and therefore not further explained. In addition, the internal combustion engine 12 can be used in a known manner for driving working and auxiliary equipment, such as working hydraulics, pneumatics, etc., of the tractor 10. In the operation of the internal combustion engine 12, exhaust gases are produced, which are discharged via an exhaust gas arrangement 16 to the environment, wherein the exhaust gases are aftertreated in order to reduce environmental pollution.

The exhaust system 16 directs the exhaust gases of the internal combustion engine 12 to the environment, wherein the exhaust gases flow through a number of components of the exhaust gas system 16 order. The exhaust gas system 16 is at least partially disposed outside of the tractor 10, wherein in the illustrated embodiment, the arranged outside of the engine compartment 14 part of the exhaust gas system 16 is arranged substantially perpendicular and laterally in front of a driver's cab 18. The exhaust gas line arrangement 16 has a first exhaust gas system 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 gas arrangement 16 through a second exhaust gas system component 22, for example an exhaust with a silencer. The first exhaust gas system component 20 and the second exhaust gas system component 22 are arranged substantially coaxially with one another along a longitudinal axis 24, the second exhaust gas system component 22 being arranged in the vertical direction above the first exhaust gas system component 20.

The first exhaust gas system component 20 is fastened to a support element 26 fixed to the vehicle, wherein the support element 26 is configured at an angle, and carries substantially the entire weight of the first exhaust gas system component 20. The second exhaust gas component 22, which is arranged above the first exhaust gas system component 20, is fastened to the top of a housing 28, which encloses the first exhaust gas system component 20 on the outside. The housing 28 is configured to receive substantially all of the weight of the second exhaust line component 22 and to include the first exhaust line component 20 on the outside and substantially free of vertical loads. At a lower end, the housing 28 is arranged on the support element 26, for example annularly. The housing 28 is arranged at a distance from the first exhaust gas system component 20, whereby an exchange of air and thus a cooling of the first exhaust gas system component 20 is made possible. To improve the cooling performance, the housing 28 can have a plurality of cooling openings 30 on the circumference. On the bottom side, the housing 28 is supported and fixed to the support element 26. The support element 26 is designed in the form of an angle which surrounds an exhaust nozzle 36, through which the exhaust gases from the internal combustion engine 12 to the first exhaust gas line component 20, the catalyst, are passed. The support element 26 is formed substantially horizontally on the vehicle side, and is arranged substantially vertically on the support structure side.

In a conventional exhaust aftertreatment, the exhaust gases of the internal combustion engine 12 are first passed through a diesel oxidation catalyst and a diesel particulate filter (DPF), before an adjuvant, usually urea, is sprayed into a dosing module for reducing part of the exhaust gases. Subsequently, a selective reduction catalyst (SCR) 20 is arranged, in which a Reduction of a portion of the exhaust gases takes place, wherein the nitrogen oxides (NOx) are reduced before the exhaust gases are discharged through a silencer into the environment. 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 FIG. 2 shown at least a first sensor device 32 disposed within the support member 26. This is used to monitor, control and / or regulation of the exhaust gas system 16, in particular their exhaust aftertreatment components. Adjacent to the first sensor device 32, an opening 34 in the support element 26 is formed on the outside, on a side facing away from the vehicle. Through this opening 34 a better supply of cooling air to the first sensor device 32 is made possible. 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 by grids 52, which are permeable to air, against ingress of dirt. The inside, on a side facing the vehicle 10 opening 34 is formed in a cover 50 which is detachably connected to the support member 26. The grid structure 52 is formed integrally with the cover 50.

Within 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 receive at least one sensor device 32, 44. The fastener 38 is releasably attached to a mounting member 62. Within the support element 26, the fastening element 38 is arranged substantially vertically. The first sensor device 32 is detachably fastened to the fastening element 38 and is arranged on the fastening element 38 on a side remote from the first exhaust gas system component 20 and / or exhaust gas nozzle 36. The fastening element 38 acts like a heat shield against the heat emitted or radiated by the first exhaust gas system component 20 and / or the exhaust gas used and, for example, may have a temperature of approximately 200 ° C. during the operation of the exhaust gas system 16. The first sensor device 32 is connected via a first sensor line 40 to a first sensor 42, for example a temperature sensor. connected, which is arranged directly on the first exhaust gas 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 may be, for example, a nitrogen oxide sensor which, in particular on the output side at the first exhaust gas line component 20, an SCR catalytic converter, can measure a Sickoxid NOx concentration in order to improve control 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 system component 20. In order to achieve better protection against the heat radiation, for example, of the first exhaust gas system component 20, the sensor devices 32, 44 are secured to the fastening element 38 at a distance therefrom by spacers 58. This allows a circulation of cooling air between the sensor means 32, 44 and the fastener 38, whereby additional heat can be dissipated. The spacers 56 may be in the form of washers or integrally formed with the fastener 38. Spacers 56 integrally formed with the fastening element 38 may be formed in the fastening element 38 in the form of protrusions, in particular with internal threads. A detachable connection can be effected by means of fastening elements 56 in the form of screws. The fastening element 38 has an edge 54 in an upper region for connection to the support element 26, which is connected in a form-fitting manner and / or releasably connected to the support element 26 by means of connecting means 56.

In FIG. 4 a substantially flat fastening element 38 is shown in the form of a sheet on which on one side side by side a first sensor device 32 and a second sensor device 44 are arranged. The first sensor device 32 is arranged on the fastening element 38 by means of a tape-shaped holder 60 which wraps around it. About the spacers 56 and the holder 60, the first sensor device 32 by means of fastening means 56 spaced from the fastener 38 is attached. 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 via a first sensor line 40 and a second sensor line 4 with their respective sensors (not shown). The Control devices 32, 44 furthermore each have a plug-in connection via which they can be connected, for example, to a central control device (not shown).

LIST OF REFERENCE NUMBERS

10

vehicle

12

internal combustion engine

14

engine compartment

16

Exhaust train assembly

18

cab

20

First exhaust gas component

22

Second exhaust gas component

24

longitudinal axis

26

supporting member

28

casing

30

cooling apertures

32

first sensor device

34

opening

36

exhaust Stutzten

38

fastener

40

first sensor line

42

first sensor

44

second sensor device

46

second sensor line

48

second sensor

50

cover

52

lattice structure

54

fold

56

fastener

58

spacer

60

holder

62

mounting element

Claims (10)

Exhaust gas arrangement for a, in particular agricultural, vehicle with an internal combustion engine (12), with at least a first exhaust gas component (20), wherein the first exhaust gas component (20) outside of an engine compartment (14) of the vehicle (10), in particular substantially vertically, is arranged a housing (28), which surrounds at least the first exhaust gas line component (20) on the outside, a vehicle side fixed support member (26) for receiving at least the first exhaust gas component (20) and / or the housing (28), and a vehicle side of the first exhaust gas component (20) arranged exhaust nozzle (36) for conducting the exhaust gases from the internal combustion engine (12) to the first exhaust gas line component (20), characterized in that
the exhaust gas line arrangement (16) has at least one first sensor device (32) which is arranged at least partially within the housing (28) and / or the support element (26). Arrangement according to claim 1, characterized in that at least one fastening element (38) for receiving the at least first sensor device (32) is provided which on the first exhaust gas line component (20), the exhaust nozzle (36), on the inside of the housing (28) and / or on the inside of the support element (26) is arranged. Arrangement according to claim 1 or 2, characterized in that the fastening element (38) is designed and arranged such that the at least first sensor device (32) against heat, in particular radiant heat, the at least first exhaust gas component (20) and / or the exhaust gas nozzle ( 36) is shielded. Arrangement according to one of the preceding claims, characterized in that the fastening element (38) substantially flat and / or curved, the shape of the housing (28), the support element (26), the first exhaust gas component (20) and / or the exhaust gas nozzle ( 36) following, is formed. Arrangement according to one of the preceding claims, characterized in that the fastening element (38) has at least one spacer (58) for the spaced mounting of the at least first sensor device (32). Arrangement according to one of the preceding claims, characterized in that the housing (28) and / or the support element (26) has at least one opening (34) for cooling the at least first sensor device (32). Arrangement according to one of the preceding claims, characterized in that a grille structure (52) is provided for the air-permeable cover of an opening (34). Arrangement according to one of the preceding claims, characterized in that an opening (34) and / or a grid structure (52) in a detachably on the housing (28) and / or the support member (26) can be arranged cover member (50) are formed. Arrangement according to one of the preceding claims, characterized in that one, in particular first, exhaust gas component (20) is an exhaust pipe section, a silencer, a diesel particulate filter, an oxidation catalyst, a selective reduction catalyst (SCR), or a dosing module for a reducing excipient. Vehicle, in particular agricultural working machine, with at least one exhaust gas arrangement (16) according to one of the preceding claims.

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