DE102017219721A1 - Exhaust tract for an internal combustion engine of a motor vehicle and motor vehicle - Google Patents

Abstract

The invention relates to an exhaust gas tract for an internal combustion engine of a motor vehicle, with a catalyst element (7) through which exhaust gas (2) can pass for after-treatment of the exhaust gas (2), with at least one downstream of the catalyst element (7) and from the exhaust gas (2). permeable by a muffler region (8), and with at least one on at least one downstream of the catalyst element (7) and upstream of the muffler region (8) arranged measuring point (9) of at least a portion (15) of the exhaust gas (2) flow-around measuring device (4) for monitoring a function of the catalyst element (7), wherein the catalyst element (7) and the muffler area (8) in a common housing (6) are arranged and the measuring device (4) on a catalyst element (7) and the muffler area (8) facing away from the outside (11) of the housing (6) is arranged.

Description

The invention relates to an exhaust tract for an internal combustion engine of a motor vehicle and a motor vehicle according to the preambles of the independent claims.

Such an exhaust system for an internal combustion engine of a motor vehicle is already out of the DE 10 2015 220 254 A1 known. This exhaust tract serves to discharge an exhaust gas flow from an internal combustion engine into an environment surrounding a motorcycle. The exhaust tract comprises an exhaust gas purification catalyst, which is arranged upstream of a pre-silencer. Downstream of the exhaust gas purifying catalyst and upstream of the pre-silencer, a lambda probe is arranged.

Furthermore, from the WO 2005 121 533 A1 a method for controlling a fuel mixture of a mobile internal combustion engine by means of a control probe in an exhaust system known. This control probe is arranged inside a catalytic converter of the exhaust system. In this case, the control probe is a lambda probe, by means of which an oxygen storage capacity of the catalyst can be determined.

In addition, from the EP 0 807 749 A2 an exhaust system for a motor vehicle known. The exhaust system includes a combined catalytic converter silencer. In the combined catalyst muffler, a catalyst means and a muffler are housed in a common elongated housing.

The prior art is further described below with reference to 1 and 2 explained in more detail. A well-known exhaust tract of a motor vehicle is in 1 shown schematically in a sectional view. This exhaust tract comprises a catalyst 1 which exhaust 2 can be fed from an internal combustion engine of the motor vehicle. Upstream of the catalyst 1 is one as a control probe 3 formed lambda probe arranged by means of which an oxygen partial pressure difference of the exhaust gas 2 upstream of the catalyst 1 relative to an environment of the control probe 3 can be determined. On the basis of the control probe 3 determined first oxygen partial pressure difference of the internal combustion engine to be supplied combustion mixture is adjustable. Downstream of the catalyst 1 is as a monitor probe 4 trained lambda probe arranged. By means of the monitor probe 4 is a second oxygen partial pressure difference of the exhaust gas 2 downstream of the catalyst 1 relative to an environment of the monitor probe 4 determined. Based on the second oxygen partial pressure difference, the function of the catalyst 1 be checked. Downstream of the monitor probe 4 can be in the car in 1 not shown silencer 5 be arranged. The combustion mixture is controlled as a function of the first oxygen partial pressure difference between a lean mixture and a rich mixture. Continuous regulation of lean mixture and rich mixture produces oxygen thrusts in the exhaust gas 2 , resulting in the monitor probe 4 continuous voltage surges are triggered. With increasing age of the monitor probe 4 upstream catalyst 1 its oxygen storage capacity decreases, whereby an attenuation of oxygen fluctuations or oxygen escapes decreases. This decrease in oxygen storage capacity is by means of the monitor probe 4 measurable and thus detectable.

For motorcycles is related to one 1 described arrangement for reasons of space difficult to realize. Because of this, as in 2 shown in a motorcycle according to the prior art, the catalyst 1 and the muffler 5 in a common housing 6 arranged. Here it is common that the control probe 3 upstream of the catalyst 1 outside the case 6 is arranged. The control probe 3 used in the motorcycle as well as in the car to measure the coming of the internal combustion engine exhaust gas 2 to adjust the combustion mixture for the internal combustion engine depending on this. When related to 2 described arrangement of the catalyst 1 and the silencer 5 in the common housing 6 without monitor probe 4 There is the disadvantage that the function of the catalyst 1 can not be verified.

The object of the present invention is to provide an exhaust gas tract for an internal combustion engine of a motor vehicle and a motor vehicle, by means of which a function of a catalytic converter of the motor vehicle can be checked particularly advantageously.

This object is achieved by an exhaust tract for an internal combustion engine of a motor vehicle and by a motor vehicle having the features of the independent claims. Advantageous embodiments of the invention are the subject of the dependent claims and the description.

A first aspect of the invention relates to an exhaust tract for an internal combustion engine of a motor vehicle. This exhaust gas tract comprises a catalytic converter element through which exhaust gas from the internal combustion engine can flow for the after-treatment of the exhaust gas. The catalyst element may be part of a catalyst of the exhaust gas tract, wherein the catalyst comprises at least one catalyst element. Furthermore, the exhaust gas tract comprises at least one silencer area arranged downstream of the catalyst element and through which the exhaust gas can flow. The silencer area may be part of a silencer of the exhaust tract, wherein the silencer comprises at least one silencer area. In other words, the muffler area is arranged downstream of the catalyst element, so that the exhaust gas from the internal combustion engine first flows through the catalyst element and then flows through the muffler area. The exhaust gas tract furthermore comprises at least one measuring device, which can be flowed over by at least one measuring point located downstream of the catalyst element and upstream of the muffler region, for monitoring a function of the catalytic converter. Thus, at least a portion of the exhaust gas first flows through the catalyst element, then through the measuring point at which the measuring device is flowed around by the exhaust gas and then through the muffler area. In this case, the measuring device in particular flows around in such a way from the part of the exhaust gas, that by means of the measuring device, a measured value of the exhaust gas can be detected. Based on the measured value, the function of the catalyst can be monitored, for example.

In order to enable a particularly advantageous checking of the function of the catalytic converter, it is provided according to the invention that the catalytic converter element and the silencer area are arranged in a common housing and the measuring device is arranged on an outer side of the housing facing away from the catalytic converter element and the silencer area. The arrangement of the catalyst element and the muffler area in the common housing allows the creation of a particularly compact exhaust tract, which requires very little installation space. This is particularly advantageous when integrating the exhaust gas tract to a motorcycle, since, in principle, particularly little space is available for a motorcycle. The measuring device is arranged on the outside of the common housing, wherein the housing has an opening in which a part of the measuring device is arranged and which allows that the measuring device is partially arranged outside of the housing and partially within the housing of exhaust gas flow around. Due to the arrangement of the measuring device at least partially outside of the housing on the outside of very little space is required within the housing for the measuring device. For example, only one sensor of the measuring device can be arranged inside the housing and can be flowed around by exhaust gas. Thus, within the housing, a particularly large volume is available for the at least one catalyst element of the catalytic converter as well as the at least muffler region of the muffler. Furthermore, due to its location on the outside of the housing, the measuring device is protected from high temperatures prevailing inside the housing.

In an advantageous embodiment of the invention, it is provided that the exhaust gas tract comprises a first exhaust gas guide element, via which a first part of the exhaust gas can be fed to the muffler area while bypassing the measuring point. Furthermore, the exhaust gas tract comprises a second exhaust gas guide element, by means of which a second part of the exhaust gas different from the first part can first be fed to the measuring point and then to the muffler area. In other words, the first part of the exhaust gas flows through the catalyst element, the first exhaust gas guide element and the muffler section. The second part of the exhaust gas flows through the catalyst element, the second exhaust gas guide, the measuring point and then the muffler area. In other words, the first exhaust gas guide element and the second exhaust gas guide element are respectively arranged downstream of the catalyst element and upstream of the muffler region, whereby the exhaust gas can be conducted from the catalyst element to the muffler region both by means of the first exhaust gas guide element and by means of the second exhaust gas guide element. For example, the measuring point is arranged within the second exhaust gas guide, so that the second part of the exhaust gas flows through the measuring point when flowing through the second Abgasleitelements and thus flows around the measuring device. This allows degrees of freedom in an arrangement of the measuring point, since the second part of the exhaust gas to be measured is guided to the measuring point by means of the second exhaust gas guide element. In this way, for example, the first part of the exhaust gas can be guided in the region of a central axis of the housing, whereas the second part of the exhaust gas is guided by means of the second exhaust element to a wall of the housing and arranged on the wall of the housing measuring point. For example, an exhaust aftertreatment or a sound attenuation in the region of the central axis of the housing is particularly efficient, so that, for example, a majority of the exhaust gas can be conducted as the first part by means of the first exhaust gas direct from the catalyst element to the muffler area. By way of example, the second part of the exhaust gas, which is smaller in comparison to the majority, can be guided out of the region of the center axis of the housing toward the measuring housing located within the housing in order to be measured by means of the measuring device. This is a particularly efficient exhaust aftertreatment or sound reduction and simultaneous measurement of the exhaust gas at particularly small space requirement of the exhaust tract possible.

In a further advantageous embodiment of the invention, it is provided that the second exhaust gas guide element is arranged as a line element which can be flowed through by the second part and extends from the catalyst element at least to the measuring point. In this case, the line element, for example, a wall, by means of which the exhaust gas from the muffler area and / or from the catalyst element is partially defined. This allows a particularly clean separation of the second part of the exhaust gas from the first part of the exhaust gas and from the catalyst element and the muffler area.

In a further advantageous embodiment of the invention, it is provided that at least one flow deflection of the exhaust gas to at least 90 degrees can be effected by the conduit element within the housing. In particular, the flow deflection of the second part of the exhaust gas is effected by approximately 90 degrees by means of the conduit element. For this purpose, at least the second part of the exhaust gas is brought by means of the conduit member from the region of the central axis of the housing to the wall of the housing. For this purpose, the conduit element may have a bend of approximately 90 degrees. The second part of the exhaust gas is thus brought on a particularly short path from the catalyst element or from the region of the central axis of the housing to the wall of the housing and in particular to the measuring point. As a result, the line element can advantageously be made particularly short.

In this context, it has proved to be advantageous if the conduit element extends from the catalyst element to an opening formed in an inner peripheral side surface of the housing facing the catalyst element and the muffler area and through which the measuring device penetrates, via which the measuring device extends from the outside into the opening Housing extends into it. In other words, the housing has the lateral surface up to which the inner side of the conduit element extends from the catalyst element. Here, the line element extends at least up to the penetrated by the measuring device opening of the inner peripheral side surface of the housing. Through this opening, the measuring device extends through into the housing, so that the measuring device is partially disposed outside of the housing and partially within the housing. Thus, the second part of the exhaust gas is conducted by means of the conduit member of the catalyst element directly to the opening, wherein the measuring device is arranged in the region of the opening to measure the exhaust gas in the region of the measuring point.

In a further advantageous embodiment of the invention it is provided that the outside has an arrangement point at which the measuring device is arranged. In this case, at least one of the arrangement point comprehensive and at least respective parts of the catalyst element and the muffler portion extends in a direction perpendicular to the flow direction of the catalyst element flowing through the exhaust gas extending direction outwardly overlapping length range of the housing in the flow direction of the exhaust gas throughout at a constant height. In other words, the housing, at least in the region of the arrangement point at which the measuring device is arranged, has an outer surface free of covering along the flow direction of the exhaust gas flowing through the catalyst element. For example, the housing is at least substantially cylindrical, wherein an extension direction of the cylindrical shape extends parallel to the flow direction of the exhaust gas flowing through the catalyst element. In this case, the housing as well as the length region of the housing comprising the arrangement point has an at least substantially constant radius. Thus, heat accumulation in the region of the arrangement point can be at least substantially prevented, so that the measuring device can be protected from damage due to particularly high temperatures. In particular, the housing in the region of the arrangement point has the opening through which the measuring device extends.

In a further advantageous embodiment of the invention, it is provided that the measuring device is designed as a lambda probe. The lambda probe can be a monitor probe, by means of which a first oxygen partial pressure difference prevailing downstream of the catalyst element of the second part of the exhaust gas relative to an environment of the housing is determined. On the basis of the determined oxygen partial pressure difference, the function of the catalyst element can be monitored.

In a further advantageous embodiment of the invention, a lambda probe arranged upstream of the catalyst element is provided in addition to the measuring device. The lambda probe arranged upstream of the catalyst element can be a control probe, by means of which a second oxygen partial pressure difference prevailing upstream of the catalyst element of the exhaust gas flowing into the catalyst element can be detected to an environment of the control probe. The second oxygen partial pressure difference may be provided by the control probe for the measuring device become. Based on the first oxygen partial pressure difference and the second oxygen partial pressure difference, the measuring device can check the function of the catalyst element.

A second aspect of the invention relates to a motor vehicle with an internal combustion engine, by means of which the motor vehicle is drivable. Furthermore, the motor vehicle comprises an exhaust gas tract through which exhaust gas of the internal combustion engine can flow. This exhaust tract, in turn, has at least one catalyst element through which the exhaust gas can flow for the after-treatment of the exhaust gas. In addition, the exhaust gas tract has at least one silencer region arranged downstream of the catalyst element and permeable by the exhaust gas. Moreover, the exhaust gas tract comprises at least one measuring device, which can be flowed over by at least one measuring point arranged downstream of the catalyst element and upstream of the muffler region, for monitoring a function of the catalytic converter. In other words, the exhaust gas tract comprises the measuring device, which is arranged at the measuring point arranged downstream of the catalyst element and upstream of the muffler region. Furthermore, the measuring device at the measuring point can be flowed around by the at least one part of the exhaust gas.

In order to enable a particularly advantageous monitoring of the catalyst element, it is inventively provided that the catalyst element and the muffler area are arranged in a common housing and the measuring device is arranged on a side facing away from the catalyst element and the muffler outside of the housing. Due to the arrangement of the catalyst element and the muffler area in the common housing, these have a particularly low space requirement. In order to measure at least the part of the exhaust gas by means of the measuring device downstream of the catalyst element and upstream of the muffler area, the measuring device is arranged on the outside of the common housing of the catalyst element and the muffler area. Advantageously, thus, the function of the catalyst can be checked even in the particularly space-saving arrangement of the catalyst element and the muffler area in the common housing.

The exhaust gas tract of the motor vehicle may be, for example, the exhaust gas tract explained in connection with the exhaust gas tract according to the invention.

In a particularly advantageous embodiment of the invention, the motor vehicle is designed as a motorcycle. Since the motorcycle has a particularly small available space, the compact arrangement of the catalyst element and the muffler portion in the common housing due to its low space requirement is particularly advantageous. In addition, the arranged on the outside of the housing measuring device allows the verification of the function of the catalyst element of the motorcycle.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively indicated combination but also in other combinations or in isolation.

• 1 eine schematische Seitenansicht eines Katalysatorelements für ein Kraftfahrzeug gemäß dem Stand der Technik mit einer stromauf des Katalysatorelements angeordneten Regelsonde zum Einstellen eines Verbrennungsgemischs einer Verbrennungskraftmaschine sowie eine stromab des Katalysatorelements angeordnete Monitorsonde, mittels welcher eine Funktion des Katalysatorelements überwachbar ist;
• 2 eine schematische Seitenansicht eines Abgastrakts für eine Verbrennungskraftmaschine eines Kraftrads gemäß dem Stand der Technik, wobei ein Katalysatorelement und ein Schalldämpferbereich innerhalb eines gemeinsamen Gehäuses angeordnet sind und stromauf des Katalysatorelements die von einem von der Verbrennungskraftmaschine kommenden Abgasstrom umströmbare Regelsonde angeordnet ist, mittels welcher das Verbrennungsgemisch der Verbrennungskraftmaschine einstellbar ist;
• 3 in einer schematischen Schnittansicht einen Abgastrakt einer Verbrennungskraftmaschine eines Kraftfahrzeugs, bei welchem ein Katalysatorelement und ein Schalldämpferbereich in einem gemeinsamen Gehäuse angeordnet sind und sowohl eine Regelsonde vorgesehen ist, mittels welcher stromauf des Katalysatorelements von der Verbrennungskraftmaschine kommendes Abgas analysierbar ist, als auch eine Monitorsonde vorgesehen ist, mittels welcher stromab des Katalysatorelements und stromauf des Schalldämpferbereichs das Abgas nach Durchströmen des Katalysatorelements vermessen werden kann; und
• 4 eine schematische Schnittansicht einer alternativen Ausführungsform des Abgastrakts mit den in einem gemeinsamen Gehäuse angeordneten Katalysatorelement und Schalldämpferbereich sowie mit der stromauf des Katalysatorelements angeordneten Regelsonde und der stromab des Katalysatorelements und stromauf des Schalldämpferbereichs angeordneten Monitorsonde, welche an einer dem Katalysatorelement und dem Schalldämpferbereich abgewandten Außenseite des Gehäuses angeordnet ist und von einem mittels eines Leitungselements von einem Hauptabgasstrom abgezweigten Teil des Abgases umströmt wird.

The invention will now be explained in more detail with reference to a preferred embodiment and with reference to the drawings. Show it:

• 1 a schematic side view of a catalyst element for a motor vehicle according to the prior art with a control element arranged upstream of the catalyst element for adjusting a combustion mixture of an internal combustion engine and a monitor disposed downstream of the catalyst element monitoring probe, by means of which a function of the catalyst element is monitored;
• 2 a schematic side view of an exhaust tract for an internal combustion engine of a motorcycle according to the prior art, wherein a catalyst element and a silencer area are arranged within a common housing and upstream of the catalyst element is arranged by a coming from the internal combustion engine exhaust stream umströmbare control probe by means of which the combustion mixture of Internal combustion engine is adjustable;
• 3 in a schematic sectional view of an exhaust tract of an internal combustion engine of a motor vehicle, in which a catalyst element and a silencer area are arranged in a common housing and both a control probe is provided, by means of which upstream of the catalyst element from the internal combustion engine exhaust gas can be analyzed, and a monitor probe is provided , by means of which downstream of the catalyst element and upstream of the muffler region, the exhaust gas can be measured after flowing through the catalyst element; and
• 4 a schematic sectional view of an alternative embodiment of the exhaust tract with the arranged in a common housing catalyst element and muffler and arranged upstream of the catalyst element control probe and the downstream of the catalyst element and upstream of the muffler region arranged monitor probe, which faces away from the catalyst element and the muffler outside of the housing is arranged and flows around a branched by means of a line member of a main exhaust gas flow part of the exhaust gas.

Because the 1 and 2 have already been explained in detail in connection with the prior art, this Fig. will not be discussed again.

In the 3 and 4 is an exhaust tract for an internal combustion engine of a motor vehicle, in particular a motorcycle, shown in different embodiments, each schematically and in section. The exhaust tract comprises in each of the embodiments of an exhaust gas 2 the internal combustion engine can flow through the catalyst element 7 for the aftertreatment of the exhaust gas 2 and at least one downstream of the catalyst element 7 arranged and from the exhaust gas 2 permeable silencer area 8th , Both in the in 3 shown as well as in the 4 shown embodiment is at a downstream of the catalyst element 7 and upstream of the muffler section 8th arranged measuring point 9 one of at least part of the exhaust gas 2 umströmbare measuring device, which in this case is the monitor probe 4 acts to monitor a function of the catalyst element 7 , in particular the catalyst 1 arranged. To create a space-saving exhaust tract, as possible, are the catalyst element 7 and the silencer area 8th in the common housing 6 arranged.

At the in 3 shown embodiment of the exhaust tract of the motorcycle is the monitor probe 4 at a recess 10 of the housing 6 mounted so that by means of the monitor probe 4 the exhaust 2 downstream of the catalyst element 7 and upstream of the muffler section 8th to check the function of the catalyst 1 or the catalyst element 7 can be measured. To any disadvantages with respect to a within the indentation 10 developing particularly high temperature in the area of the monitor probe 4 counteracts, the monitor probe 4 in the in 4 shown embodiment of a catalyst element 7 and the silencer area 8th opposite outside 11 of the housing 6 arranged. This can be particularly advantageous by means of the monitor probe 4 the exhaust 2 downstream of the catalyst element 7 and upstream of the muffler section 8th be measured in an embodiment in which the catalyst element 7 and the silencer area 8th in the common housing 6 are arranged.

To a measurement of the second oxygen partial pressure difference of the exhaust gas 2 downstream of the catalyst element 7 by means of the monitor probe 4 on the outside 11 of the housing 6 to allow, are a first exhaust gas guide 12 and a second exhaust gas guide 13 intended. By means of the first exhaust gas guide 12 is a first part 14 the exhaust gas 2 bypassing the measuring point 9 the silencer area 8th fed. By means of the second exhaust gas guide 13 is one of the first part 14 different second part 15 the exhaust gas 2 first to the measuring point 9 and then to the silencer area 8th hinführbar.

The silencer area 8th may, for example, over an entire interior of the housing 6 which does not extend from the catalyst element 7 or the catalyst 1 , the first exhaust gas guide 12 and the second exhaust gas guide 13 is filled. In this case, the silencer area 8th both the catalyst element 7 or the catalyst 1 , the first exhaust gas guide 12 and the second exhaust gas guide 13 inside the case 6 surround.

In the present case, both the first exhaust gas guide 12 as well as the second exhaust gas guide 13 formed as a respective line element, by means of which the exhaust gas 2 at least in a flow length region along its flow direction against the catalyst element 7 and / or the silencer area 8th is delimitable. The first exhaust gas guide 12 Alternatively, it can only be used as an opening in the catalytic converter 1 be formed through which the first part 14 the exhaust gas 2 the silencer area 8th can be fed.

The trained as a conduit element second exhaust guide 13 extends from the catalyst element 7 up to the measuring point 9 , This allows that by means of the second exhaust gas guide 13 the second part 15 the exhaust gas 2 from the catalyst element 7 to the measuring point 9 is feasible, so at the measuring point 9 the monitor probe 4 at least partially from the second part 15 the exhaust gas 2 is flowed around. Downstream of the measuring point 9 becomes the second part 15 the exhaust gas 2 by means of the second exhaust gas guide element 13 the silencer area 8th fed.

The measuring point is located here 9 at the in 4 shown embodiment of a catalyst element 7 and the muffler area 8th facing, inner peripheral side shell surface 16 of the housing 6 , To the second part 15 the exhaust gas 2 by means of the second exhaust gas guide element 13 from the catalyst element 7 to the measuring point 9 to guide, has the second exhaust guide 13 two bends of about 90 degrees, to respective flow deflections of the second part 15 the exhaust gas 2 to effect about 90 degrees.

The outside 11 of the housing 6 has an arrangement office 17 on, on which the monitor probe 4 is arranged. At this location 17 shows the case 6 an opening 18 in which at least a portion of the monitor probe 4 is arranged and over which the monitor probe 4 from the outside 11 of the housing 6 in the case 6 extends into it. This extends the monitor probe 4 in the case 6 into the measuring point 9 into it. In addition to the monitor probe 4 the exhaust tract comprises the control probe 3 which is upstream of the catalyst element 7 outside the case 6 is arranged. By means of the control probe 3 is the exhaust 2 upstream of the housing 6 analyzable and, depending on the analysis of the combustion mixture, which is supplied to the internal combustion engine, adjustable.

The housing 6 In the present case, it is at least essentially cylindrical, so that a longitudinal region of the housing is formed 6 in the flow direction of the catalyst element 7 flowing exhaust gas 2 extends consistently at a constant height, wherein the length range the arrangement point 17 includes. The length of the housing 6 covers at least respective parts of the catalyst element 7 and the silencer area 8th in a direction perpendicular to the flow direction of the catalyst element 7 flowing exhaust gas 2 extending direction to the outside. In the present case, the housing 6 at least substantially over its entire longitudinal extension direction along the flow direction of the catalyst element 7 flowing exhaust gas 2 a constant radius. The housing 6 therefore know in the in 4 illustrated embodiment, the indentation 10 not up. Thus, the monitor probe 4 at the in 4 embodiment shown not in the recess 10 arranged, causing overheating of the monitor probe 4 by yourself in the dent 10 Dammed hot air is avoided.

The related to 4 described exhaust tract refers to an installation of a control probe 3 second lambda probe as a monitor probe 4 downstream of the catalyst 1 and upstream of the muffler 5 of the motorcycle, especially a motorcycle or a scooter. This is the monitor probe 4 on the outside 11 of the housing 6 arranged, wherein it is at the housing 6 can be about an exhaust. By means of at least one second exhaust gas guide element 13 , which may be formed as a tube, becomes the second part 15 the exhaust gas 2 from the catalyst element 7 to the monitor probe 4 executed forwards. Advantageously, thereby the exhaust tract of the motorcycle with the second lambda probe as a monitor probe 4 be equipped to required functions of the catalyst 1 to be checked and thus be able to comply with required emission standards. By the in 4 described arrangement disadvantages such as packaging problems and thus space problems can be avoided. Furthermore, heat problems can be avoided because the monitor probe 4 on the outside 11 of the housing 6 is arranged. In addition, the related 4 described embodiment is particularly inexpensive and can be easily replaced.

LIST OF REFERENCE NUMBERS

1

catalyst

2

exhaust

3

Regulating probe

4

monitor probe

5

silencer

6

casing

7

catalyst element

8th

muffler area

9

measuring point

10

indentation

11

outside

12

first exhaust gas guide

13

second exhaust gas guide

14

first part of the exhaust gas

15

second part of the exhaust gas

16

lateral surface

17

arranging site

18

opening

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102015220254 A1 [0002]
• WO 2005121533 A1 [0003]
• EP 0807749 A2 [0004]

Claims (10)

Exhaust tract for an internal combustion engine of a motor vehicle, comprising a catalytic converter element (7) for aftertreatment of the exhaust gas (2) which is arranged downstream of the catalytic converter element (7) and can be flowed through by the exhaust gas (2) ), and with at least one on at least one downstream of the catalyst element (7) and upstream of the muffler region (8) arranged measuring point (9) of at least a portion (15) of the exhaust gas (2) flow around the measuring device (4) for monitoring a function of the catalyst element (7), characterized in that the catalyst element (7) and the muffler area (8) in a common housing (6) are arranged and the measuring device (4) on a catalyst element (7) and the muffler area (8) facing away from outside ( 11) of the housing (6) is arranged. Exhaust tract after Claim 1 characterized by : - a first exhaust gas guide element (12), via which a first part (14) of the exhaust gas (2) can be fed to the muffler area (8), bypassing the measuring point (9); and - a second Abgasleitelement (13) is provided, by means of which one of the first part (14) different second part (15) of the exhaust gas (2) first to the measuring point (9) and then to the muffler area (8) is to be guided. Exhaust tract after Claim 2 Characterized in that the second exhaust shroud (13) flowed through as one of the second part (15) and (7) of the catalyst element is disposed at least to the measuring point (9) extending conduit member. Exhaust tract after Claim 3 , characterized in that at least one flow deflection of the exhaust gas (2) by at least 90 degrees can be effected by the conduit member within the housing (6). Exhaust tract after Claim 3 or 4 , characterized in that the line element from the catalyst element (7) to one in the catalyst element (7) and the muffler area (8) facing the inner peripheral side surface (16) of the housing (6) formed and penetrated by the measuring device (4) opening (18), via which the measuring device (4) extends from the outside (11) into the housing (6). Exhaust tract according to one of the preceding claims, characterized in that the outer side (11) has an arrangement point (17) on which the measuring device (4) is arranged, wherein at least one of the arrangement point (11) comprehensive and at least respective parts of the catalyst element ( 7) and the muffler area (8) in a direction perpendicular to the flow direction of the catalyst element (7) by flowing exhaust gas (2) extending direction outwardly overlapping length range of the housing (6) in the flow direction of the exhaust gas (2) extends continuously at a constant height. Exhaust tract according to one of the preceding claims, characterized in that the measuring device (4) is designed as a lambda probe. Exhaust tract according to one of the preceding claims, characterized in that in addition to the measuring device (4) an upstream of the catalyst element (7) arranged lambda probe (3) is provided. Motor vehicle, with an internal combustion engine, by means of which the motor vehicle is driven, and with one of exhaust gas (2) of the internal combustion engine exhaust gas tract, which at least one of the exhaust gas (2) through-flow catalyst element (7) for aftertreatment of the exhaust gas (2), at least one downstream of the catalyst element (7) arranged and by the exhaust gas (2) can be flowed through the muffler area (8), and at least one at least one downstream of the catalyst element (7) and upstream of the muffler area (8) arranged measuring point (9) of at least one part (15 ) of the exhaust gas (2) for monitoring a function of the catalyst element (7), characterized in that the catalyst element (7) and the silencer area (8) are arranged in a common housing (6) and the measuring device ( 4) on a side facing away from the catalyst element (7) and the muffler area (8) (11 ) of the housing (6) is arranged. Motor vehicle after Claim 9 , characterized in that the motor vehicle is designed as a motorcycle.

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