DE202019102211U1 - Controlled valve for an exhaust pipe - Google Patents

Abstract

Valve for an exhaust pipe, said valve (1) comprising:
- A tubular valve body (3) having a first and a second opening (5, 7) which are opposite to each other, wherein the valve body (3) inside a passage (9) for the circulation of the exhaust gases between the first and the second Opening (5, 7) limited;
- A first tube (63) which engages in the first opening (5) and has a first inner surface (64);
- A within the valve body (3) arranged flap (11);
- a mechanism (12) for driving the flap (11) with respect to the valve body (3) between at least one position for releasing the exhaust gas circulation passage (9) and a position for closing the exhaust gas circulation passage (9), wherein the flap (11) in its closed position against the first inner surface (64).

Description

The invention generally relates to controlled valves for exhaust pipes.

Such controlled valves are normally installed in exhaust pipes of luxury cars. Exhaust pipes for low price vehicles do not include such valves because of their relatively high cost.

In the near future, new standards will be introduced to further limit noise levels from vehicle exhaust gas lines. These standards force carmakers to generally disseminate the use of controlled valves, which are a technical solution that can reduce noise levels.

In this context, the object of the invention is to propose a valve whose manufacturing costs are reduced and which can thus be used in exhaust pipes of any kind without unduly increasing the cost of these lines.

• - einen rohrförmigen Ventilkörper, der eine erste und eine zweite Öffnung aufweist, die zueinander entgegengesetzt sind, wobei der Ventilkörper innen einen Durchgang für die Zirkulation der Abgase zwischen der ersten und der zweiten Öffnung begrenzt;
• - ein erstes Rohr, das in die erste Öffnung eingreift und eine erste Innenfläche aufweist;
• - eine innerhalb des Ventilkörpers angeordnete Klappe;
• - einen Mechanismus zum Antreiben der Klappe in Bezug auf den Ventilkörper zwischen mindestens einer Stellung zur Freigabe des Abgaszirkulationsdurchgangs und einer Stellung zum Schließen des Abgaszirkulationsdurchgangs, wobei die Klappe in ihrer Schließstellung an der ersten Innenfläche anliegt.

To this end, the invention relates to a valve for an exhaust pipe, the valve comprising:

• a tubular valve body having a first and a second opening which are opposite to each other, wherein the valve body internally delimits a passage for the circulation of the exhaust gases between the first and the second opening;
• a first tube engaging the first opening and having a first inner surface;
• - A disposed within the valve body flap;
• - A mechanism for driving the flap with respect to the valve body between at least one position for releasing the exhaust gas circulation passage and a position for closing the exhaust gas circulation passage, wherein the flap in its closed position bears against the first inner surface.

Characterized in that the flap rests in its closed position on the first tube, and more precisely on the first inner surface, the valve body can be shortened on the side of the first tube.

In the prior art, the flap engages the inner surface of the valve body and the first tube is displaced beyond the abutment line. The valve body must thus extend well beyond the abutment line, so that the first tube is covered to a sufficient length to allow the tight fitting of the first tube and the valve body to one another. In other words, the valve body has a first portion which serves for tight attachment to the first tube and is extended by a second portion on which the abutment line lies.

In the invention, the second section is omitted. The investment line is at the end of the first tube, which engages itself in the first section.

The overall length of the valve body is thus reduced. This also reduces the cost of producing the valve.

• - das Ventil weist ein zweites Rohr auf, das in die zweite Öffnung eingreift und eine zweite Innenfläche aufweist, wobei die Klappe in ihrer Schließstellung auch an der zweiten Innenfläche anliegt;
• - die Klappe hat eine ovale Form;
• - die Klappe liegt in ihrer Schließstellung auf mindestens 30% ihres Umfangs an der ersten Innenfläche an;
• - die Klappe bewegt sich entsprechend einer Drehbewegung in Bezug auf den Ventilkörper um eine Drehachse zwischen ihrer Freigabestellung und ihrer Schließstellung, wobei der Ventilkörper entlang der Drehachse eine festgelegte Höhe hat und zwischen seiner ersten und zweiten Öffnung eine Länge hat, die zwischen 25% und 75% und vorzugsweise zwischen 40% und 60% der festgelegten Höhe beträgt;
• - der Antriebsmechanismus weist eine starr an der Klappe befestigte Antriebswelle und ein Lager zur Führung der Welle zum Antreiben der Klappe in Drehung in Bezug auf den Ventilkörper auf, wobei das Führungslager ein inneres Ende aufweist, das innerhalb des Ventilkörpers hervorsteht und mit einem Anschlag versehen ist, der die Freigabestellung der Klappe definiert;
• - das Führungslager weist eine starr am Ventilkörper befestigte rohrförmige Hülle und ein in der rohrförmigen Hülle untergebrachtes Organ zur Führung der Antriebswelle auf, wobei der Anschlag an der rohrförmigen Hülle ausgebildet ist;
• - das erste Rohr liegt am inneren Ende des Führungslagers an;
• - das erste Rohr weist ein erstes Ende auf, in dem eine Einkerbung ausgeschnitten ist, wobei das Führungslager in die Einkerbung eingreift;
• - das zweite Rohr weist ein zweites Ende auf, in dem eine weitere Einkerbung ausgeschnitten ist, wobei das Führungslager in die weitere Einkerbung eingreift; und
• - das erste und das zweite Ende liegen aneinander an.

The valve may also have one or more of the following features, which are used individually or in all technically possible combinations:

• - The valve has a second tube which engages in the second opening and having a second inner surface, wherein the flap in its closed position also bears against the second inner surface;
• - the flap has an oval shape;
• - The flap is in its closed position to at least 30% of its circumference on the first inner surface on;
• - The flap moves according to a rotational movement with respect to the valve body about an axis of rotation between its release position and its closed position, wherein the valve body along the axis of rotation has a fixed height and between its first and second opening has a length which is between 25% and 75 %, and preferably between 40% and 60% of the specified height;
• - The drive mechanism has a rigidly fixed to the flap drive shaft and a bearing for guiding the shaft for driving the flap in rotation with respect to the valve body, wherein the guide bearing has an inner end which protrudes within the valve body and is provided with a stop defining the release position of the flap;
• - The guide bearing has a rigidly attached to the valve body tubular sheath and housed in the tubular shell member for guiding the drive shaft, wherein the stopper is formed on the tubular shell;
• - The first tube is located at the inner end of the guide bearing on;
• - the first tube has a first end in which a notch is cut out, the guide bearing engaging in the notch;
• - The second tube has a second end, in which a further notch is cut out, wherein the guide bearing engages in the further notch; and
• - The first and the second end are adjacent to each other.

According to a second aspect, the invention relates to an exhaust pipe equipped with a valve having the above features.

• - 1 eine perspektivische Ansicht eines erfindungsgemäßen Ventils, wobei die Betätigungseinrichtung des Ventils nicht dargestellt ist;
• - 2 eine perspektivische Ansicht, die 1 ähnlich ist, wobei das erste und das zweite Rohr nicht dargestellt sind;
• - 3 eine perspektivische Explosionsansicht des Ventils aus den 1 und 2 ohne das erste und das zweite Rohr, jedoch mit der Betätigungseinrichtung;
• - 4 eine Ansicht des Führungslagers, der Antriebswelle und des Adapters des Ventils der 1 bis 3 im Axialschnitt;
• - 5 eine Schnittansicht des Ventils aus den 1 bis 3 in einer zur Drehachse senkrechten Ebene, wobei das erste und das zweite Rohr nur teilweise dargestellt sind;
• - 6 eine perspektivische Ansicht des Führungslagers; und
• - 7 eine vereinfachte Ansicht, die das Führungslager und das erste und das zweite Rohr bei einer Ausführungsvariante der Erfindung zeigt.

Further features and advantages of the invention will become apparent from the detailed description given below by way of example and not limitation with reference to the accompanying drawings. Show:

• - 1 a perspective view of a valve according to the invention, wherein the actuator of the valve is not shown;
• - 2 a perspective view, the 1 is similar, wherein the first and the second tube are not shown;
• - 3 an exploded perspective view of the valve from the 1 and 2 without the first and second tubes, but with the actuator;
• - 4 a view of the guide bearing, the drive shaft and the adapter of the valve 1 to 3 in axial section;
• - 5 a sectional view of the valve from the 1 to 3 in a plane perpendicular to the axis of rotation, wherein the first and the second tube are only partially shown;
• - 6 a perspective view of the guide bearing; and
• - 7 a simplified view showing the guide bearing and the first and the second tube in an embodiment of the invention.

That in the 1 to 3 shown valve 1 is intended for installation in an exhaust pipe of a vehicle with an internal combustion engine. This vehicle is usually a motor vehicle such as a car or a truck.

The valve 1 For example, it is intended to alter the passage area provided to the exhaust gases in an exhaust conduit member, such as a pipe or muffler, to control exhaust gas recirculated at the inlet of the internal combustion engine (EGR) all or a portion of the exhaust stream to a heat exchanger or a bypass line of an exhaust purifying member, such as a _NOx trap or an SCR catalyst (selective catalytic reduction eng -. selective catalytic reduction) to conduct.

The valve 1 has a tubular valve body 3 with a first and a second opening 5 . 7 on, which are opposite to each other. At the first and second opening 5 . 7 These are usually an exhaust gas inlet and an exhaust gas outlet, respectively, and will be referred to as such in the following description.

The valve body 3 bounded in a passageway 9 for the circulation of the exhaust gases between the first 5 and the second opening 7 ,

The valve 1 also has a in the valve body 3 arranged flap 11 on.

The valve 1 also has a mechanism 12 to drive the flap 11 with respect to the valve body 3 between at least one position for releasing the exhaust gas circulation passage 9 and a position for closing the exhaust gas circulation passage 9 on.

The flap 11 moves in a rotational movement about a rotation axis X with respect to the valve body 3 between its release position and its closed position.

In the present description, the terms are axial and radial with respect to the axis of rotation X the flap 11 to understand.

In the closed position prevents the flap 11 the circulation of the exhaust gases between the first and second openings 5 . 7 along the passage 9 , In the release position is the flap 11 the passage 9 at least partially free and allows the circulation of the exhaust gases between the first and the second opening 5 . 7 along the passage 9 ,

The drive mechanism 12 usually has a wave 13 to drive the flap 11 in rotation about the axis of rotation X with respect to the valve body 3 on. The drive shaft 13 is for example a full or hollow metal tube.

The flap 11 For example, a metal plate is formed by deep drawing.

The flap 11 is rigid with the drive shaft via any suitable means, such as welds 13 attached.

The valve 1 Eg is a throttle valve, with the drive shaft 13 according to a middle line of the flap 11 extends.

The valve 1 also has an actuator 15 and a transmission device 17 which is adapted to a motor torque between the actuator 15 and the drive shaft 13 transferred to. The actuating device 15 is of any kind. The actuating device 15 is for example an electric geared motor.

The transmission device 17 has, for example, a driving organ 19 on, that of the actuator 15 is rotated, an adapter 21 , which is directly on the drive shaft 13 is attached, and an elastic organ 23 that the adapter 21 and the driving organ 19 coupled in rotation.

The driving organ 19 For example, is the output shaft of the actuator 15 ,

The adapter 21 Eg is a metal plate, which is rigid on the drive shaft 13 is attached. The torque is only from the elastic organ 23 between the driving organ 19 and the adapter 21 transfer.

This is, for example, a metal wire bent in a suitable shape. A first end 25 of the elastic organ 23 engages in a not shown notch, which in the driving organ 19 is trained. A second end 27 of the elastic organ 23 engages in notches 29 one in the adapter 21 trained and in 4 are shown.

The valve 1 also has at least one warehouse 31 for guiding the drive shaft 13 the flap 11 in rotation with respect to the valve body 3 on.

This guide camp 31 reaches through an opening 33 of the valve body 3 ,

It has an inner end 35 on that inside the valve body 3 protrudes.

In addition, there is an outer end 37 of the leadership camp 31 outside the valve body 3 ,

The guide camp 31 is rigid with the valve body via any suitable means 3 attached. It is, for example, in a close manner with the edge of the opening 33 welded.

The guide camp 31 has a tubular shell 39 and one in the tubular shell 39 accommodated organ 41 for guiding the drive shaft 13 on.

The tubular shell 39 has a cylindrical wall 43 on, coaxial with the axis of rotation X the flap 11 runs, even with the drive shaft 13 coincides. The cylindrical wall 43 is at the outer end 37 open and at the inner end 35 of the leadership camp 31 partly through a floor 45 locked. The floor 45 has a middle hole 47 on, that of the drive shaft 13 is crossed.

The governing body 41 has the general shape of a hollow cylinder. It has a middle passage 49 up on the middle hole 47 is aligned and coaxial with the axis of rotation X runs. The drive shaft 13 is in the middle passage 49 added.

The governing body 41 is at the bottom at the bottom 45 on. The governing body 41 is located radially outward on the cylindrical wall 43 the tubular shell 39 on. At his to the ground 45 opposite axial end becomes the guiding organ 41 through a free area 51 limited axially opposite to the valve body 3 is turned. The middle passage 49 flows into the middle of the free area 51 out.

An end part 53 the drive shaft 13 protrudes from the middle passage 49 out. The adapter 21 is rigid at the end part 53 attached.

The governing body 41 comprises a wire mesh and / or a material selected from graphite and ceramic, or any combination of these or these wire mesh materials.

There is e.g. completely made of a wire mesh or entirely of graphite or ceramic or comprises both a wire mesh and graphite and / or ceramic.

The adapter 21 has a contact surface 55 up with one at the lead camp 31 trained complementary surface 57 is in close contact. The complementary area 57 is at the management body 41 and more specifically on the free area 51 educated. The contact surface 55 is through a convex middle section 59 of the adapter 21 who is at the lead camp 31 convex is defined. The contact surface 55 is from the elastic organ 23 axially against the complementary surface 57 applied.

The contact surface 55 has, for example, starting from the axis of rotation X in radial planes a circular arc-shaped cross-section.

The complementary area 57 is frusto-conical and runs coaxially to the axis of rotation X ,

In this case, the contact is linear.

As a variant, this is the other way round. The complementary area 57 has starting from the axis of rotation X in a radial plane a circular arc-shaped cross section, and the contact surface 55 is frustoconical.

According to another variant, the two surfaces 55 and 57 frustoconical, and the contact between the contact surface 55 and the complementary surface 57 takes place on a two-dimensional surface, which is frustoconical.

The actuating device 15 is about a holder 61 rigid at the guide bearing 31 attached.

The output shaft 19 lies in the axial extension of the drive shaft 13 ,

The valve 1 also has a first pipe 63 on that in the first opening 5 engages and a first inner surface 64 having ( 5 ).

The first inner surface 64 limits the first tube 63 inside.

The first pipe 63 is upstream in communication with the manifold (not shown) which collects the exhaust gases exiting the internal combustion engine of the vehicle. Usually, other devices such as a turbocompressor or exhaust gas cleaning devices between the first tube 63 and the manifold arranged.

In its closed position is the flap 11 on the first inner surface 64 on.

As in 5 shown has the exhaust gas circulation passage 9 a center line L, extending from the first opening 5 to the second opening 7 extends.

The center line L passes through the geometric centers of the cross sections of the exhaust gas circulation passage 9 that pass through this passage 9 from the first opening 5 to the second opening 7 follow one another.

In the example shown, the center line L is rectilinear.

The normals to the flap 11 forms in its closed position with the center line L usually an angle which is between 15 ° and 60 °, for example between 30 ° and 45 °.

In its release position, the normal forms the flap 11 with the center line L eg an angle of 90 °.

The flap 11 is in its closed position at least 30% of its circumference, preferably at least 40% of its circumference, more preferably at least 45% of its circumference at the first inner surface 64 on.

That's the flap 11 usually oval, eg elliptical.

Such a shape is particularly suitable when it is in the valve body 3 is a tubular section with a circular cross-section.

As a variant, the flap 11 depending on the cross section of the valve body 3 a circular shape or any other shape.

The first pipe 63 beats advantageously at the inner end 35 of the leadership camp 31 on. This situation is in 5 shown.

The first pipe 63 has a first end 65 on top of a free border 67 is limited. The free edge 67 beats at the inner end 35 of the leadership camp 31 on.

More precisely, the first tube beats 63 on the tubular shell 39 of the leadership camp 31 on.

As in 5 can be seen, stands the first tube 63 over the first end 65 with the exhaust gas circulation passage 9 in fluid communication.

The first end 65 preferably has an outer cross-section which substantially coincides with the inner cross-section of the first opening 5 is identical. In the illustrated example, the outer cross section and the inner cross section are circular.

The first pipe 63 is by any suitable means in a tight manner on the valve body 3 attached.

The guide camp 31 defines the position of the first pipe 63 with respect to the valve body 3 along the midline L ,

The valve 1 also has a second pipe 69 on that in the first opening 7 engages and a second inner surface 70 having.

The second inner surface 70 limits the second tube 69 inside.

The second tube 69 downstream communicates with a channel (not shown) through which the purified exhaust gases are expelled to the atmosphere. Usually, other devices such as a damper or exhaust gas cleaning devices between the second tube 69 and the channel.

The flap 11 is in its closed position also on the second inner surface 70 on.

The flap 11 is in its closed position at least 30% of its circumference, preferably at least 40% of its circumference, more preferably at least 45% of its circumference on the second inner surface 70 on.

The second tube 69 also beats at the inner end 35 of the leadership camp 31 on. The second tube 69 has a second end 71 on top of a free border 73 is limited. The free edge 73 hits the leader camp 31 and more precisely at the inner end 35 of the leadership camp 31 on.

As previously defined the guide bearing 31 the position of the second tube 69 with respect to the valve body 3 along the midline L ,

The second end 71 has an outer cross-section, whose shape substantially with the inner cross section of the second opening 7 is identical. In the illustrated example, the outer cross section and the inner cross section are circular. The second tube 69 is by any suitable means in a tight manner on the valve body 3 attached.

The valve body 3 has along the center line L a shortened length.

Usually, the valve body has 3 along the axis of rotation X a fixed height. He has between his first and his second opening 5 . 7 a length between 25% and 75% of the specified height and preferably between 40% and 60% of the specified height.

The valve body 3 thus has a middle section 75 on top of the leadership camp 31 carries, a first end portion 77 , the first opening 5 limited and inside the first end 65 receives, and a second end portion 79 that's the second end 7 limited and inside the second end 71 receives.

The contact line between the flap 11 in the closed position and the first inner surface 64 lies along the midline L where the first end is 65 and the first end portion 77 overlap.

Likewise, the line of contact between the flap 11 in the closed position and the second inner surface 70 along the midline L where the second end is 71 and the second end portion 79 overlap.

Advantageously, the inner end 35 of the leadership camp 31 with a stop 81 provided, the release position of the flap 11 Are defined ( 5 and 6 ).

The stop 81 is usually on the tubular shell 39 trained and more precisely from the ground 45 the tubular shell 39 carried.

He stands axially on a surface of the soil 45 forth, opposite to the governing body 41 is turned. He has a free area 83 on, referring to the axis of rotation X extends radially, with the flap 11 thus circumferentially with the free area 83 comes into contact when it comes into the release position.

According to a in 7 shown embodiment is in the first end 65 of the first pipe 63 a notch 85 cut out. This notch 85 is more precisely in the free edge 67 cut out. The notch 85 surrounds the inner end 35 of the leadership camp 31 ,

In other words, the inner end engages 35 of the leadership camp 31 in the notch 85 on.

The free end 35 of the leadership camp 31 advantageously has in one to the axis of rotation X vertical plane one in the form of the notch 75 tapered cross-section on. The edge of the notch 85 is thus practically on its entire length against the outer surface of the guide bearing 31 pressed.

Likewise, advantageously, a notch 87 in the second end 71 of the second tube 69 cut out. This notch 87 surrounds the inner end 35 of the leadership camp 31 , Advantageously, in one of the axis of rotation X vertical plane considered the outer cross section of the inner end 35 in the form of the notch 87 rejuvenated. The edge of the notch 87 is thus practically on its entire length against the outer surface of the guide bearing 31 pressed.

Advantageously, the first and second ends are located 65 . 71 to each other. The notches 75 and 77 surround the guide camp 31 practically on its entire circumference.

The invention has numerous advantages.

As stated above, the fact that the flap rests in its closed position on the inner surface of the first tube, the valve body can be shortened.

This makes it possible, in particular, for the valve body to have, between its first and its second opening, a length which is between 25% and 75% of the fixed length, i. is particularly compact.

If the flap in its closed position also bears against the inner surface of the second tube, the valve body can be shortened even further.

The fact that the flap has an oval shape, it is possible to maintain a contact between the flap and the first and / or second inner surface over a large length.

When the flap is in its closed position at least 30% of its circumference on the first inner surface, a good tightness is achieved. This is even better when the flap rests in its closed position on at least 30% of its circumference on the second inner surface.

Characterized in that the inner end of the guide bearing is provided with a stop which defines the release position of the flap, the construction of the valve can be simplified. It is not necessary to provide a special component to ensure this function. The number of components of the valve is reduced. The cost of producing the valve is also reduced.

Characterized in that the first tube and / or the second tube rests against the inner end of the guide bearing, the construction of the valve is simplified. It is therefore not necessary to provide a stop in the valve body or on another component of the valve which is specially provided for the position of the first tube and / or the second tube during assembly of the valve when this tube engages in the valve body. to block. With the guide bearing, it is thus possible to hold the first tube and / or the second tube in its initial position until the attachment of the tube has been carried out on the valve body.

If the first tube and / or the second tube has a notch, with the bearing engaging in the notch, it is possible to further shorten the valve body.

When the ends of the first and second tubes abut each other, the valve body is particularly compact.

The valve can include numerous variants.

The first opening is not necessarily an exhaust inlet. The first opening may be an exhaust outlet. Similarly, the second opening is not necessarily an exhaust outlet. The second opening may be an exhaust inlet.

The flap may lie in its closed position only on the first inner surface or both on the first inner surface and on the second inner surface.

In the embodiment described above, the valve has a single bearing for guiding the drive shaft in rotation. This has a large length, so that a good guidance of the drive shaft is ensured in rotation. As a variant, the valve has a second guide bearing, which guides the end of the drive shaft 13 that to the adapter 21 opposite, which ensures rotation in rotation.

In this case, the first tube beats 63 and / or the second tube 69 advantageously both at the inner end 35 of the leadership camp 31 as well as on the second guide bearing.

It has been described above that the guide bearing 31 where the first pipe 63 and / or the second tube 69 comes into abutment, it is provided, the end of the drive shaft 13 to lead, with which the transmission device 17 connected is. As a variant leads the guide bearing 31 the end of the drive shaft 13 that is not with the transmission device 17 connected is.

In the example described above, the first tube 63 and the second tube 69 at the inner end 35 of the leadership camp 31 brought into play. As a variant, only the first tube 63 at the inner end 35 of the leadership camp 31 brought into play.

According to a further aspect, the invention relates to an exhaust pipe, which is provided with a valve 1 equipped with the above features.

Claims (12)

Valve for an exhaust pipe, said valve (1) comprising: - A tubular valve body (3) having a first and a second opening (5, 7) which are opposite to each other, wherein the valve body (3) inside a passage (9) for the circulation of the exhaust gases between the first and the second Opening (5, 7) limited; - A first tube (63) which engages in the first opening (5) and has a first inner surface (64); - A within the valve body (3) arranged flap (11); - a mechanism (12) for driving the flap (11) with respect to the valve body (3) between at least one position for releasing the exhaust gas circulation passage (9) and a position for closing the exhaust gas circulation passage (9), wherein the flap (11) in its closed position against the first inner surface (64). Valve (1) to Claim 1 wherein the valve (1) has a second tube (69) which engages in the second opening (7) and has a second inner surface (70), wherein the flap (11) in its closed position also on the second inner surface (70) is applied. Valve (1) to Claim 1 or 2 , wherein the flap (11) has an oval shape. Valve (1) according to one of the preceding claims, wherein the flap (11) rests in its closed position on at least 30% of its circumference on the first inner surface (64). Valve (1) according to one of the preceding claims, wherein the flap (11) moves according to a rotational movement with respect to the valve body (3) about an axis of rotation (X) between its release position and its closed position, wherein the valve body (3) along the The axis of rotation (X) has a fixed height and between its first and second openings (5, 7) has a length which is between 25% and 75% and preferably between 40% and 60% of the specified height. Valve (1) according to one of the preceding claims, wherein the drive mechanism (12) comprises a drive shaft (13) fixed rigidly to the flap (11) and a bearing (31) for guiding the shaft (13) to drive the flap (11) Rotation with respect to the valve body (3), wherein the guide bearing (31) has an inner end (35) which projects inside the valve body (3) and is provided with a stop (81) which controls the release position of the flap (11 ) Are defined. Valve (1) to Claim 6 , wherein the guide bearing (31) has a rigidly attached to the valve body (3) tubular sheath (39) and in the tubular sheath (39) housed organ (41) for guiding the drive shaft (13), wherein the stop (81) the tubular sheath (39) is formed. Valve (1) to Claim 6 or 7 , wherein the first tube (63) at the inner end (35) of the guide bearing (31) rests. Valve (1) to Claim 8 wherein the first tube (63) has a first end (65) in which a notch (85) is cut out, the guide bearing (31) engaging the notch (85). Valve (1) to Claim 9 in combination with Claim 2 wherein the second tube (69) has a second end (71) in which a further notch (87) is cut out, the guide bearing (31) engaging in the further notch (87). Valve (1) to Claim 10 wherein the first and second ends (65, 71) abut one another. Exhaust pipe with a valve according to one of the preceding claims.

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