Turbine housing, multi-channel turbine and multi-channel turbocharger

Abstract

The present invention relates to a turbine housing, a multi-channel turbine and a multi-channel turbocharger. The turbine housing for a multi-channel turbine has a first spiral body and a second spiral body. The first spiral body has a first auxiliary channel and the second spiral body has a second auxiliary channel, wherein the first auxiliary channel and the second auxiliary channel are in fluid connection with each other in a connection area.

Description

Technical Field

[0001] The invention relates to a turbine housing for a multi-channel turbine, a corresponding multi-channel turbine and a turbocharger having the multi-channel turbine. Background Art

[0002] More and more new generation vehicles are equipped with supercharging systems to meet demand objectives and legal requirements. In the development of supercharging systems, it is necessary to optimize not only the individual components but also the system as a whole with regard to its reliability and efficiency.

[0003] Known exhaust gas turbochargers have a turbine with a turbine wheel, which is driven by the exhaust gas flow of the combustion engine. A compressor with a compressor wheel arranged on the same shaft as the turbine wheel compresses the fresh air drawn in by the engine. As a result, the amount of air or oxygen available to the engine for combustion increases. This in turn leads to an increase in the power of the combustion engine. In particular, multi-channel turbines are also known in the prior art, which are used, for example, for six-cylinder engines.

[0004] A disadvantage of known multi-channel turbines, such as twin-scroll turbines or twin-swirl turbines, is that in certain operating states, for example, starting from a certain speed, the separation into two spirals can have a negative impact on the performance of the turbocharger. To solve this problem, it is known in the prior art to provide overflow regions in which the exhaust gas can overflow from one spiral to the other and in opposite directions. It is also known that these overflow regions can be opened and closed variably by a linear control device. A disadvantage of known multi-channel turbines with overflow regions is the flow path between the two spirals.

[0005] It is therefore an object of the present invention to provide a turbine housing for a multi-channel turbine and a corresponding multi-channel turbine with an optimized flow path between two spiral bodies. Summary of the invention

[0006] The present invention relates to a turbine housing for a multi-channel turbine, a corresponding multi-channel turbine, and a turbocharger with the multi-channel turbine.

[0007] The turbine housing for a multi-channel turbine according to the present invention comprises a first spiral body and a second spiral body. The first spiral body has a first auxiliary channel and the second spiral body has a second auxiliary channel. The first auxiliary channel and the second auxiliary channel are in fluid connection with each other in the connection area. By means of a special flow guide through the auxiliary channel, when the valve is opened (the valve closing body of the valve is arranged in the connection area in the closed state), a targeted flow is generated in the connection area and through the connection area and from the first spiral body to the second spiral body and in the opposite direction. This optimized flow guide in the turbine housing promotes a reduction in the pressure drop when the valve is opened, especially within the rated power range of the engine, and thereby improves the efficiency of the turbine with the turbine housing according to the present invention. In addition, the mass flow of the exhaust gas can be adapted to any opening angle of the valve through the shape of the valve closing body of the valve and almost independently of the connection area through the fluid connection.

[0008] In the design solution, the first auxiliary channel can extend from the first spiral body before the connecting area along the flow direction and re-enter the first spiral body after the connecting area, and the second auxiliary channel can extend from the second spiral body before the connecting area along the flow direction and re-enter the second spiral body after the connecting area.

[0009] In a design that can be combined with all the designs described so far, the first auxiliary channel, the second auxiliary channel and the connecting region can together form an X-shaped channel region in the turbine housing. Such a channel guide optimizes the flow path in the overflow region and the introduction and discharge of exhaust gas in the overflow region.

[0010] In a design which can be combined with all the designs described so far, the first auxiliary channel and / or the second auxiliary channel can be separated from the first spiral body or the second spiral body at least partially by a housing part of the turbine housing. Alternatively, the first auxiliary channel and / or the second auxiliary channel can be in fluid connection with the first spiral body or the second spiral body along its entire length.

[0011] In a configuration which can be combined with all the configurations described above, a valve region for accommodating a valve closing body can be formed in the connecting region.

[0012] In a design that can be combined with all the designs described so far, a bypass opening can be arranged in this connection region. The connection region of the turbine housing according to the invention not only serves as a connection between the two spirals, but is also part of a bypass arrangement of the turbine housing or of a turbine with a corresponding turbine housing. It is thus advantageously possible to control both the overflow region between the two spirals and the bypass opening using only a single valve and a single actuator for the valve. A valve seat can be formed around the bypass opening.

[0013] In a design that can be combined with all the designs described so far, the turbine housing also has a through-hole for supporting a spindle of the valve. Due to the special design of the turbine housing, the orientation of the through-hole can be selected relatively freely compared to known solutions. On the other hand, the orientation of the spindle relative to the valve closing body can also be freely designed, since the displacement plane of the spindle is independent of the orientation of the closing body. This brings about an advantageous degree of freedom in the design process of the turbine housing.

[0014] The present invention also includes a multi-channel turbine for an exhaust gas turbocharger with a turbine impeller and a bypass assembly. The turbine according to the present invention includes a turbine housing according to any one of the above-mentioned design solutions.

[0015] In the design, the bypass assembly can have a valve. In particular, the valve can be a flap valve. The valve can include a valve closing body and a spindle. A lever arm can be arranged between the spindle and the valve closing body. In particular, the lever arm can be welded to the valve closing body. The valve closing body can extend into the connection area of ​​the turbine housing through the bypass opening in the closed position of the valve and cooperate with the valve area to prohibit the overflow of exhaust gas from the first spiral body to the second spiral body. The valve closing body can have an annular sealing surface, which cooperates with the valve seat of the turbine housing in the closed position of the valve to close the bypass opening. The valve closing body can be partially hollow. The valve closing body can have a protrusion on the side away from the connection area. The protrusion can, for example, extend vertically from the side of the valve closing body away from the bypass opening and serve as a stopper for the lever arm when the valve is installed. In terms of function, the protrusion is used on the one hand to correctly position the valve closing body when determining the position. On the other hand, during the connection of the lever arm and the valve closing body, for example when the two parts are welded to each other, the projection helps to ensure the position of the valve closing body relative to the lever arm. Thus, the projection simplifies installation and avoids incorrect installation.

[0016] In one embodiment of the multi-channel turbine which can be combined with all the embodiments described above, the valve is continuously adjustable from a closed position into an open position.

[0017] In one embodiment of the multi-channel turbine which can be combined with all the embodiments described above, the bypass arrangement further comprises an actuator for actuating the valve.

[0018] The present invention also includes a multi-channel turbocharger having a compressor and a turbine according to any one of the above-mentioned designs.

[0019] Further details and features of the invention are described below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A view showing a partial section of a first embodiment of a turbine housing according to the invention or of a turbine according to the invention;

[0021] Figure 2 Shows Figure 1 a view of an enlarged partial sectional area of ​​a turbine housing according to the invention or of a turbine according to the invention;

[0022] Figure 3 Shows Figure 1 a sectional view of a turbine housing according to the invention or a turbine according to the invention;

[0023] Figure 4 A view showing a flow channel of a second exemplary embodiment of a turbine housing according to the invention or of a turbine according to the invention;

[0024] Figure 5 A further view showing a flow channel of a second exemplary embodiment of a turbine housing according to the invention or of a turbine according to the invention;

[0025] Figure 6 A side view showing a valve of a turbine according to the invention;

[0026] Figure 7 Shows Figure 6 Perspective view of the valve in FIG. DETAILED DESCRIPTION

[0027] Exemplary embodiments of a turbine housing 100 according to the invention or a turbine 10 according to the invention are described below with reference to the drawings.

[0028] Figure 1 A multi-channel turbine 10 according to the invention is shown with a turbine housing 100 according to the invention. The turbine 10 comprises a bypass assembly 300 with a valve 310, which will be described in more detail below. The turbine housing 100 comprises a first spiral 110 and a second spiral 120. Figure 4 and Figure 5 The turbine housing 100 according to the present invention is described in more detail below. Figure 4 and Figure 5 In the example, for better illustration, the flow direction according to the present invention is shown through a channel in the turbine housing 100. Figure 4 and Figure 5 As can be seen in the figure, the first spiral body 110 has a first auxiliary channel 112 and the second spiral body 120 has a second auxiliary channel 122. The first auxiliary channel 112 and the second auxiliary channel 122 extend along a portion of the first spiral body 110 or the second spiral body 120. The first auxiliary channel 112 and the second auxiliary channel 122 are in fluid connection with each other in the connecting area 130. Therefore, the connecting area 130 shows an overflow area from the first spiral body 110 into the second spiral body 120 and in the opposite direction. Due to the special flow guidance through the auxiliary channels 112, 122, when the valve 310 is open (the valve closing body 312 of the valve (see Figure 5 ) is arranged in the connection area 130 in the closed state (see Figure 1 ), a targeted flow is generated into and through the connecting region 130 and from the first spiral body 110 to the second spiral body 120 and in the opposite direction. This optimized flow guidance in the turbine housing 100 leads to a reduction in the pressure drop of the spiral bodies 110, 120 that are exposed (compared to the non-exposed) when the valve 310 is open, especially in the rated power range of the engine, and thus improves the efficiency of the turbine 10 with the turbine housing 100 according to the invention. In addition, the mass flow of the exhaust gas can be adapted to any opening angle of the valve 310 via the fluid connection by the shape of the valve closing body 312 of the valve 310 and almost independently of the connecting region 130.

[0029] In addition, Figure 5 4 shows the flow direction 400 through the turbine housing 100. Figure 5 It can be seen that the first auxiliary channel 112 extends from the first spiral body 110 before the connecting area 130 along the flow direction 400 and re-enters the first spiral body 110 after the connecting area 130. Similarly, the second auxiliary channel 122 extends from the second spiral body 120 before the connecting area 130 along the flow direction 400 and re-enters the second spiral body 120 after the connecting area 130 (see Figure 4 ). Figure 4 In and partly still in Figure 5As can be clearly seen in FIG. 1 , the first auxiliary channel 112 and the second auxiliary channel 122 are approximately divided into two sub-channels 112a, 112b or 122a, 122b, respectively, wherein the first sub-channels 112a, 122a lead from the respective first or second spiral body 110, 120 to the connecting region 130, respectively, and the second sub-channels 112b, 122b lead from the connecting region 130 back to the first or second spiral body 110, 120, respectively. In other words, in the turbine housing 100 according to the present invention, a special overflow region is correspondingly designed in the connecting region 130, which includes two inflow channels (sub-channels 112a and 122a) and two outflow channels (sub-channels 112b and 122b), wherein any one of the two spiral bodies 110, 120 is connected to the inflow channel and the outflow channel. The inflow channel and the outflow channel open into the connection area 130 or the overflow area, so that an X-shaped channel area is formed overall for overflow from the first spiral body 110 to the second spiral body 120 and in the opposite direction. Such channel guidance optimizes the flow direction of the overflow area and the introduction and discharge of exhaust gas in the overflow area.

[0030] exist Figure 4 and Figure 5 In the example of, the first auxiliary channel 112 and the second auxiliary channel 122 are at least partially separated from the first spiral body 110 or the second spiral body 120 by the housing part of the turbine housing 100. That is, at least a part of the auxiliary channels 112, 122 (or a part of the respective sub-channels 112a, 112b or 122a, 122b) extends separately through the housing wall of the turbine housing 100 beside the first and second spiral bodies 110, 120. Alternatively, the first auxiliary channel 112 and / or the second auxiliary channel 122 can be in fluid connection with the first spiral body 110 or the second spiral body 120 along their entire length. In other words, in this embodiment, the first and second auxiliary channels 112, 122 do not extend completely separately from the first and second spiral bodies 110, 120, but are designed to be connected to each other to a certain extent, that is, open to each other. Such an embodiment is, for example, Figure 3 Here, the openings 114 , 124 of the first spiral body 110 or the second spiral body 120 in the connection region 130 can be seen.

[0031] refer to Figure 2 and Figure 3, a valve area 140 for accommodating a valve closing body 312 is formed in the connecting area 130. The controlled valve 310 with the valve closing body 312 arranged at or in the turbine housing 100 is designed to (approximately) close or open a fluid connection in the connecting area 130. Here, the shapes of the valve area 140 and the valve closing body 312 are coordinated with each other. Depending on the kinematics of the valve 310, the valve 310 can completely or only approximately close the fluid connection in the connecting area 130, that is, a small gap remains between the turbine housing 100 and the valve closing body 312 in the valve area 140. The valve 310 can be used to specifically control when and how much exhaust gas can flow from the first spiral body 110 to the second spiral body 120 and vice versa. Here, the valve area 140 is defined by a connection 180 of the turbine housing 100, which separates the first spiral body 110 from the second spiral body 120 (see Figure 3 ).

[0032] Further references Figure 2 and Figure 3 , a bypass opening 150 is arranged in the connection region 130 (see also Figure 4 ). The connecting region 130 of the turbine housing 100 according to the present invention is not only used as an overflow region between the two spirals 110, 120, but is also a part of the bypass assembly 300 of the turbine housing 100 or the turbine 10. It is thus advantageously possible to control not only the overflow region between the two spirals 110, 120 but also the bypass opening 150 using only a single valve 310 and a single actuator for the valve 310 (not shown in the drawings). The bypass opening 150 is a part of the bypass assembly 300, through which the exhaust gas can be guided from the first and second spirals 110, 120 and can be guided through the first and second auxiliary channels 112, 122 and the connecting region 130 into a bypass formed by the bypass opening 150 in order to avoid the turbine wheel 200 of the turbine 10. A valve seat 160 is formed around the bypass opening 150 (see Figure 2 and Figure 3 ). The valve seat 160 interacts with the valve closing body 312 of the controlled valve 310 in order to selectively open and close the bypass opening 150. In the closed state of the valve 310, the valve closing body 312 lies flat on the valve seat 160 and closes the bypass opening 150. In this position of the valve 310, the overflow area in the connecting area 130 is still (almost) completely closed, so that the first spiral body 110 and the second spiral body 120 are (largely) separated from each other and the exhaust gas flows through.

[0033] like Figure 1 and Figure 2As can be seen in the drawing, the turbine housing 100 further comprises a through-hole 170 for supporting a spindle 314 of the valve 310. Due to the special design of the turbine housing 100, the orientation of the through-hole 170 can be selected relatively freely compared to known solutions. This means, for example, that the spindle 314 supported in the through-hole 170 does not have to be arranged at a particular angle to the flow direction 400 in the spiral bodies. On the other hand, the orientation of the spindle 314 relative to the valve closing body 312 can also be freely designed, since the displacement plane of the spindle 314 is independent of the orientation of the closing body 312. This results in an advantageous degree of freedom for the design process of the turbine housing 100.

[0034] For example, Figure 1 As can be seen in FIG. 1 , the multi-channel turbine 10 according to the invention further comprises a turbine wheel 200 and the aforementioned bypass assembly 300 . The bypass assembly 300 comprises a valve 310 . Figure 1 , Figure 3 and Figures 5 to 7 The valve 310 shown in FIG. 1 is a flap valve. Figure 6 and Figure 7 The valve 310 is described in more detail below. The valve 310 includes a valve closing body 312 and a main shaft 314. A lever arm 316 is arranged between the main shaft 314 and the valve closing body 312. In particular, the lever arm 316 can be welded to the valve closing body 312. The lever arm 316 and the main shaft 314 can be designed in a single piece. The valve closing body 312 extends into the connection area 130 of the turbine housing 100 through the bypass opening 150 in the closed position of the valve 310 and cooperates with the valve area 140 to prohibit the overflow of exhaust gas from the first spiral body 110 to the second spiral body 120. The valve closing body 312 has an annular sealing surface 312a, which cooperates with the valve seat 160 of the turbine housing 100 in the closed position of the valve 310 to close the bypass opening 150. In other words, the shape of the valve closing body 312 in the illustrated case is also referred to as approximately cap-shaped, wherein the cap-shaped flange forms an annular sealing surface 312a. However, the cross-sectional shape of the valve closing body 312 in the region of the sealing surface 312a can also be designed as another shape (e.g., oval / elliptical) or have a completely customized shape in order to optimize the flow in the region around the valve 310 in the connection region 130. The valve seat 160 is then adapted accordingly. In addition, as Figure 7As can be seen in the figure, the valve closing body 312 can be at least partially hollow. In the hollow valve closing body 312, for example, a cylindrical protrusion 320 extends from the bottom of the valve closing body 312, which is connected to the lever arm 316 at its upper end. The shape of the valve closing body 312 can be, for example, conical or spherical or a combination of conical and spherical. However, the valve closing body 312 can also adopt any other three-dimensional shape in order to optimize the flow direction in the connecting area 130 when the valve 310 is closed and / or partially opened. In addition, Figure 7 The valve closing body 312 shown in FIG. 1 further has a projection 318 on the side facing away from the connection region 130 in the installed state. The projection 318 can extend, for example, perpendicularly relative to the cap-shaped flange from the side of the valve closing body 312 facing away from the connection region 130. When the valve 310 is installed, the projection 318 serves as a stop for the lever arm 316. In terms of function, the projection 318 serves, on the one hand, for correct positioning relative to the lever arm 316 and, respectively, the spindle 314 when determining the position for the valve closing body 312. On the other hand, during the connection of the lever arm 316 to the valve closing body 312, for example when the two components are welded to each other, the projection 318 helps to ensure the position of the valve closing body 312 relative to the lever arm 316. When the valve 300 is installed, the valve closing body 312 is placed on the valve seat 160 and thus in the connection region 130. Next, the lever arm 316 is put into position, wherein in this step the projection 318 determines and fixes the position of the valve body 312 relative to the lever arm 316. Next, a closing force is applied to the lever arm 316 via the spindle 314. The lever arm 316 is then welded to the valve closing body 312 in this position. Thus, the projection 318 simplifies installation and avoids incorrect installation.

[0035] In particular, the actuator of the turbine 10 can be designed so that the valve 310 can be adjusted steplessly from the closed position to the open position. Depending on the position of the valve 310, i.e. the opening angle of the valve 310, the released overflow surface in the connecting area 130 changes, so that overflow can be achieved between the first and second spiral bodies 110, 120; and the released bypass surface of the bypass opening 150 changes, so that the exhaust gas is guided past the turbine impeller 200. The overflow surface and the bypass surface can be specified as a percentage value, which specifies the ratio of the overflow surface or the bypass surface to the cross section of the subchannel 112a or 122a. The cross section is measured at a distance from the outlet of the first or second auxiliary channel 112, 122 of the first or second spiral body 110, 120 in the range of 19 to 25 mm, in particular 20 to 24 mm, preferably 21 to 23 mm, for example about 22 mm. That is, the cross section is measured 19 to 25 mm, in particular 20 to 24 mm, preferably 21 to 23 mm, for example about 22 mm after the start of the subchannel 112a or 122a. Here, the spacing refers to the spacing along the imaginary center line of the subchannel 112a or 122a. The position of the cross section of the subchannel 112a, 122a is Figure 4 113, with reference to which the values ​​of the ratio of the cross section to the overflow surface and to the bypass surface are indicated. The cross sections of the subchannels 112a, 122a are largely of the same size in this region, so that the values ​​indicated below are based on the ratio of the cross section of the overflow surface or bypass surface to the cross section of the subchannel 112a or 122a.

[0036] When the opening angle of the valve 310 is 5°, the percentage ratio of the overflow surface to the cross section of the sub-channel 112a or 122a is between 15% and 45%, in particular between 20% and 40%, and preferably between 25% and 35%. When the opening angle of the valve 310 is 15°, the percentage ratio of the overflow surface to the cross section of the sub-channel 112a or 122a is between 65% and 95%, in particular between 70% and 90%, and preferably between 75% and 85%. When the opening angle of the valve 310 is 25°, the percentage ratio of the overflow surface to the cross section of the sub-channel 112a or 122a is between 110% and 140%, in particular between 115% and 135%, and preferably between 120% and 130%.

[0037] When the opening angle of the valve 310 is 5°, the percentage ratio of the bypass surface to the cross section of the sub-channel 112a or 122a is between 5% and 25%, in particular between 10% and 20%, and preferably between 12% and 18%. When the opening angle of the valve 310 is 15°, the percentage ratio of the bypass surface to the cross section of the sub-channel 112a or 122a is between 10% and 30%, in particular between 15% and 25%, and preferably between 17% and 23%. When the opening angle of the valve 310 is 25°, the percentage ratio of the bypass surface to the cross section of the sub-channel 112a or 122a is between 30% and 50%, in particular between 35% and 45%, and preferably between 37% and 43%.

[0038] The present invention also includes a multi-channel turbocharger having a compressor and the above-described turbine 10 having a turbine housing 100 according to the present invention.

[0039] Although the present invention is described and defined above, it should be understood that the present invention can also be alternatively defined according to the following embodiments:

[0040] 1. A turbine housing for a multi-channel turbine, the turbine housing comprising:

[0041] First spiral;

[0042] The second spiral;

[0043] It is characterized in that the first spiral body has a first auxiliary channel and the second spiral body has a second auxiliary channel, wherein the first auxiliary channel and the second auxiliary channel are in fluid connection with one another in a connecting region.

[0044] 2. The turbine housing according to embodiment 1, characterized in that the first auxiliary channel extends from the first spiral body before the connecting area in the flow direction and enters the first spiral body again after the connecting area; and

[0045] The second auxiliary channel projects from the second spiral body in the flow direction before the connecting region and enters the second spiral body again after the connecting region.

[0046] 3. The turbine housing according to embodiment 1 or embodiment 2 is characterized in that the first auxiliary channel, the second auxiliary channel and the connecting area together constitute an X-shaped channel area in the turbine housing.

[0047] 4. The turbine housing according to any one of the preceding embodiments, characterized in that the first auxiliary channel and / or the second auxiliary channel is at least partially separated from the first spiral body or the second spiral body by a housing part of the turbine housing.

[0048] 5. The turbine housing according to any of the preceding embodiments, characterized in that a valve region for accommodating a valve closing body is formed in the connecting region.

[0049] 6. The turbine housing according to any of the preceding embodiments, characterized in that a bypass opening is arranged in the connecting region.

[0050] 7. The turbine housing according to embodiment 6, characterized in that a valve seat is formed around the bypass opening.

[0051] 8. The turbine housing according to any of the preceding embodiments, characterized in that it also has a through-opening for supporting a spindle of the valve.

[0052] 9. A multi-flow turbine for an exhaust gas turbocharger, the multi-flow turbine having:

[0053] turbine impellers; and

[0054] Bypass components;

[0055] The invention is characterized by a turbine housing according to any one of the preceding embodiments.

[0056] 10. The multi-channel turbine according to embodiment 9, characterized in that the bypass assembly has a valve, in particular wherein the valve is a flap valve.

[0057] 11. The multi-channel turbine according to embodiment 10, characterized in that the valve comprises a valve closing body and a main shaft.

[0058] 12. The multi-channel turbine according to embodiment 11, characterized in that a lever arm is arranged between the main shaft and the valve closing body, in particular wherein the lever arm is welded to the valve closing body.

[0059] 13. A multi-channel turbine according to embodiment 11 or embodiment 12, characterized in that the valve closing body extends into the connection area of ​​the turbine housing through the bypass opening in the closed position of the valve and acts together with the valve area to prevent exhaust gas from overflowing from the first spiral body to the second spiral body.

[0060] 14. The multi-channel turbine according to any one of embodiments 11 to 13 is characterized in that the valve closing body has an annular sealing surface, which acts together with the valve seat of the turbine housing in the closed position of the valve to close the bypass opening.

[0061] 15. The multi-channel turbine according to any one of embodiments 11 to 14, characterized in that the valve closing body is partially hollow.

[0062] 16. The multi-channel turbine according to any one of embodiments 11 to 15, characterized in that the valve closing body has a protrusion on a side facing away from the connecting area.

[0063] 17. The multi-channel turbine according to any one of embodiments 10 to 16, characterized in that the valve can be adjusted steplessly from a closed position to an open position.

[0064] 18. The multi-channel turbine according to any one of embodiments 10 to 17, characterized in that the bypass assembly further comprises an actuator for operating the valve.

[0065] 19. A multi-flow channel turbocharger comprising:

[0066] compressor; and

[0067] A turbine according to any one of embodiments 9 to 18.

Claims

1. A turbine housing (100) for a multi-channel turbine (10), the turbine housing comprising: First spiral (110); The second helix (120); It is characterized in that The first spiral body (110) has a first auxiliary channel (112) and the second spiral body (120) has a second auxiliary channel (122), wherein the first auxiliary channel (112) and the second auxiliary channel (122) are fluidically connected to each other in a connecting area (130), wherein the first auxiliary channel (112) exits the first spiral body (110) before the connecting area (130) in the flow direction and enters the first spiral body (110) again after the connecting area (130); and The second auxiliary channel (122) exits the second spiral body (120) in the flow direction before the connecting region (130) and enters the second spiral body (120) again after the connecting region (130).

2. The turbine housing according to claim 1, characterized in that The first auxiliary channel (112), the second auxiliary channel (122) and the connecting region (130) together form an X-shaped channel region in the turbine housing (100).

3. The turbine housing according to claim 1 or 2, characterized in that The first auxiliary channel (112) and / or the second auxiliary channel (122) are at least partially separated from the first spiral body (110) and / or the second spiral body (120) by a housing portion of the turbine housing (100).

4. The turbine housing according to claim 1 or 2, characterized in that A valve region (140) for accommodating a valve closing body (312) is formed in the connecting region (130).

5. The turbine housing according to claim 1 or 2, characterized in that A bypass opening (150) is arranged in the connecting region (130).

6. A multi-channel turbine (10) for an exhaust gas turbocharger, the multi-channel turbine comprising: a turbine impeller (200); and Bypass assembly (300); It is characterized in that The multi-channel turbine has a turbine housing (100) according to claim 1 or 2.

7. The multi-channel turbine (10) according to claim 6, characterized in that: The bypass assembly (300) has a valve (310).

8. The multi-channel turbine (10) according to claim 7, characterized in that: The valve (310) includes a valve closing body (312) and a main shaft (314); and A lever arm (316) is arranged between the spindle (314) and the valve closing body (312).

9. The multi-channel turbine (10) according to claim 8, characterized in that The valve closing body (312) projects into the connection region (130) of the turbine housing (100) through a bypass opening (150) in the closed position of the valve (310) and cooperates with the valve region (140) to prevent exhaust gas from overflowing from the first spiral body (110) to the second spiral body (120).

10. The multi-channel turbine (10) according to claim 9, characterized in that The valve closing body (312) has an annular sealing surface (312a) which, in a closed position of the valve (310), cooperates with a valve seat (160) of the turbine housing (100) to close the bypass opening (150).

11. The multi-channel turbine (10) according to claim 8, characterized in that The valve closing body (312) is partially hollow.

12. The multi-channel turbine (10) according to claim 8, characterized in that The valve closing body (312) has a projection (318) on the side facing away from the connecting region (130).

13. The multi-channel turbine (10) according to claim 7, characterized in that: The valve (310) can be adjusted steplessly from a closed position to an open position.

14. The multi-channel turbine (10) according to claim 7, characterized in that: The valve (310) is a flap valve.

15. The multi-channel turbine (10) according to claim 8, characterized in that The lever arm (316) is welded to the valve closing body (312).

16. A multi-channel turbocharger comprising: compressor; and The multi-channel turbine according to claim 6.

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