Intake module of a fresh air system

Abstract

An intake module of a fresh air system for an internal combustion engine may include a housing having a plurality of openings through which fresh air is flowable, and a control device for controlling a cross-section of at least one of the openings. The control device may include at least one control staff and at least one control valve arranged on the control shaft in a rotationally fixed manner for the at least one opening. The control shaft may be mounted on the housing by at least one bearing bracket such that the control shaft is rotatable about a rotational axis. The housing may have at least one bearing receiving portion for receiving the bearing bracket. The bearing receiving portion may have an insertion opening through which the bearing bracket may be inserted in an insertion direction oriented perpendicular to the rotational axis. The bearing bracket may have two outer surfaces facing away from one another in a transverse direction running perpendicular to the rotational axis and to the insertion direction. On each outer surface, the bearing bracket may have at least two positioning blocks projecting therefrom and spaced apart from one another in the insertion direction. The bearing receiving portion may have a guide contour for each positioning block for aligning the bearing bracket in a longitudinal direction running parallel to the rotational axis, and in the transverse direction.

Claims

1. An intake module of a fresh air system for an internal combustion engine, comprising: a housing having a plurality of openings through which fresh air is flowable; a control device for controlling a cross section, through which flow can pass, of at least one of the openings; wherein the control device has at least one control shaft and at least one control valve, which is arranged on the at least one control shaft in a rotationally fixed manner, for the at least one opening; wherein the at least one control shaft is mounted on the housing by at least one bearing bracket such that the at least one control shaft is rotatable about a rotational axis; wherein the housing has at least one bearing receiving portion for receiving the at least one bearing bracket; wherein the at least one bearing receiving portion has an insertion opening; wherein the at least one bearing bracket is inserted in an insertion direction, which is oriented perpendicular to the rotational axis, through the insertion opening into the at least one bearing receiving portion; wherein the at least one bearing bracket has on an outside thereof two outer surfaces, which face away from one another with respect to a transverse direction, which runs perpendicular to the rotational axis and perpendicular to the insertion direction; wherein, on each outer surface, the at least one bearing bracket has at least two positioning blocks projecting therefrom in the transverse direction and spaced apart from one another with a space therebetween in the insertion direction; wherein the at least one bearing receiving portion has on an inside thereof a guide contour, which is complementary thereto, for each positioning block for aligning the at least one bearing bracket in a longitudinal direction, which runs parallel to the rotational axis, and in the transverse direction.

2. The intake module according to claim 1, wherein the at least one bearing bracket, on the outer surfaces, is in contact with the housing only via the positioning blocks.

3. The intake module according to claim 1, wherein the at least one bearing bracket in at least one of the longitudinal direction, the insertion direction, and the transverse direction is in contact with the housing only via the positioning blocks.

4. The intake module according to claim 1, wherein at least one of: each positioning block has a length, which is measured parallel to the longitudinal direction and which is smaller than a length of the at least one bearing bracket, which is measured parallel to the longitudinal direction; and each positioning block has a height, which is measured parallel to the insertion direction and which is smaller than a height of the at least one bearing bracket, which is measured parallel to the insertion direction.

5. The intake module according to claim 1, wherein at least one of: each positioning block is spaced apart from two longitudinal ends of the at least one bearing bracket, which are spaced apart from one another in the longitudinal direction; and each positioning block is spaced apart from two other ends of the at least one bearing bracket, which are spaced apart from one another in the insertion direction.

6. The intake module according to claim 1, wherein each positioning block has one guide surface, which runs at a right angle to the transverse direction and faces away from the at least one bearing bracket, at least one guide surface, which runs at a right angle to the insertion direction and leads in the insertion direction, and two guide surfaces, which run at right angles to the longitudinal direction and which face away from one another.

7. The intake module according to claim 1, wherein: each positioning block has two flat longitudinal positioning surfaces, which face away from one another with respect to the longitudinal direction and which extend parallel to one another and perpendicular to the longitudinal direction; and the at least one bearing receiving portion on the inside thereof has two flat longitudinal guide surfaces, which face one another with respect to the longitudinal direction and which extend parallel to one another and perpendicular to the longitudinal direction and against which one of the longitudinal positioning surfaces of each positioning block abuts in a flat manner.

8. The intake module according to claim 1, wherein: each positioning block has a flat transverse positioning surface, which extends perpendicular to the transverse direction; and the at least one bearing receiving portion has on the inside thereof a flat transverse guide surface for each positioning block, which extends perpendicular to the transverse direction and against which the transverse positioning surface of each positioning block abuts in a flat manner.

9. The intake module according to claim 1, wherein: on each outer surface, the at least two positioning blocks are aligned relative to one another in the insertion direction; and the one of the at least two positioning blocks that leads in the insertion direction is smaller than the other of the at least two positioning blocks that trails in the insertion direction.

10. The intake module according to claim 9, wherein the one of the at least two positioning blocks is arranged between the at least one control shaft and the other of the at least two positioning blocks in the insertion direction.

11. The intake module according to claim 1, wherein at least one of the positioning blocks at each outer surface has a flat stop surface, which leads in the insertion direction and which extends perpendicular to the insertion direction and which abuts flat against a flat counter stop surface, which is embodied on the inside of the at least one bearing receiving portion.

12. The intake module according to claim 1, wherein: the at least one bearing bracket has a first bearing part and a second bearing part; the first bearing part has a first bearing section against which the at least one control shaft abuts with a first circumferential section; the second bearing part has a second bearing section, which is located opposite the first bearing section and against which the at least one control shaft abuts with a second circumferential section, which is located opposite the first circumferential section; each of the first bearing part and the second bearing part has a respective inner surface, the inner surface of the first bearing part facing the inner surface of the second bearing part with respect to the transverse direction, and at least one flat positioning surface, which extends perpendicular to the transverse direction; and the at least one flat positioning surface of the first bearing part abuts flat against the at least one flat positioning surface of the second bearing part.

13. The intake module according to claim 12, wherein: the first bearing part has, on the inner surface thereof, at least one guide pin, which projects in the transverse direction; and the second bearing part has, on the inner surface thereof, at least one guide opening, which is oriented in the transverse direction and which is complementary to the at least one guide pin, and into which the at least one guide pin is inserted in the transverse direction.

14. The intake module according to claim 1, wherein the housing has at least one inlet opening for fresh air and a flange section, which has the plurality of openings, which form outlet openings for fresh air.

15. The intake module according to claim 14, wherein the at least one bearing receiving portion is embodied on a connection side of the flange section, which is provided for a connection of the housing to the internal combustion engine.

16. The intake module according to claim 14, wherein: the flange section has on a connection side thereof at least one sealing groove for receiving a seal, which abuts against the internal combustion engine so as to form a seal when the housing is connected to the internal combustion engine; the at least one bearing receiving portion is arranged in a section of the at least one sealing groove, so that the at least one sealing groove has a groove break in an area of the at least one bearing receiving portion; and the at least one bearing bracket has, in an area of the at least one sealing groove, a groove section, which completes the at least one sealing groove in an area of the groove break.

17. The intake module according to claim 16, wherein at least one positioning block has a holding surface, which faces away from the at least one control shaft and which adjoins a groove base of the groove section in a flush manner.

18. An intake module of a fresh air system for an internal combustion engine, comprising: a housing having a plurality of openings through which fresh air is flowable; a control device for controlling a cross section, through which flow can pass, of at least one of the openings; wherein the control device has at least one control shaft and at least one control valve, which is arranged on the at least one control shaft in a rotationally fixed manner, for the at least one opening; wherein the at least one control shaft is mounted on the housing by at least one bearing bracket such that the at least one control shaft is rotatable about a rotational axis; wherein the housing has at least one bearing receiving portion for receiving the at least one bearing bracket; wherein the at least one bearing receiving portion has an insertion opening; wherein the at least one bearing bracket is inserted in an insertion direction, which is oriented perpendicular to the rotational axis, through the insertion opening into the at least one bearing receiving portion; wherein the at least one bearing bracket has on an outside thereof two outer surfaces, which face away from one another with respect to a transverse direction, which runs perpendicular to the rotational axis and perpendicular to the insertion direction; wherein, on each outer surface, the at least one bearing bracket has at least two positioning blocks projecting therefrom in the transverse direction and spaced apart from one another with a distance therebetween and aligned with one another in the insertion direction, the one of the at least two positioning blocks that leads in the insertion direction is smaller than the other of the at least two positioning blocks that trails in the insertion direction; wherein the at least one bearing receiving portion has on an inside thereof a guide contour, which is complementary thereto, for each positioning block for aligning the at least one bearing bracket in a longitudinal direction, which runs parallel to the rotational axis, and in the transverse direction.

19. The intake module according to claim 18, wherein the one of the at least two positioning blocks is arranged between the at least one control shaft and the other of the at least two positioning blocks in the insertion direction.

20. An intake module of a fresh air system for an internal combustion engine, comprising: a housing having a plurality of openings through which fresh air is flowable; a control device for controlling a cross section, through which flow can pass, of at least one of the openings; wherein the control device has at least one control shaft and at least one control valve, which is arranged on the at least one control shaft in a rotationally fixed manner, for the at least one opening; wherein the at least one control shaft is mounted on the housing by at least one bearing bracket such that the at least one control shaft is rotatable about a rotational axis; wherein the housing has at least one bearing receiving portion for receiving the at least one bearing bracket; wherein the at least one bearing receiving portion has an insertion opening; wherein the at least one bearing bracket is inserted in an insertion direction, which is oriented perpendicular to the rotational axis, through the insertion opening into the at least one bearing receiving portion; wherein the at least one bearing bracket has on an outside thereof two outer surfaces, which face away from one another with respect to a transverse direction, which runs perpendicular to the rotational axis and perpendicular to the insertion direction; wherein, on each outer surface, the at least one bearing bracket has at least two positioning blocks projecting therefrom and spaced apart from one another in the insertion direction; wherein the at least one bearing receiving portion has on an inside thereof a guide contour, which is complementary thereto, for each positioning block for aligning the at least one bearing bracket in a longitudinal direction, which runs parallel to the rotational axis, and in the transverse direction; wherein the housing has at least one inlet opening for fresh air and a flange section, which has the plurality of openings, which form outlet openings for fresh air; wherein the flange section has on a connection side thereof at least one sealing groove for receiving a seal, which abuts against the internal combustion engine so as to form a seal when the housing is connected to the internal combustion engine; wherein the at least one bearing receiving portion is arranged in a section of the at least one sealing groove, so that the at least one sealing groove has a groove break in an area of the at least one bearing receiving portion; and wherein the at least one bearing bracket has, in an area of the at least one sealing groove, a groove section, which completes the at least one sealing groove in an area of the groove break.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In each case schematically

(2) FIG. 1 shows a highly simplified, circuit diagram-like schematic diagram of an internal combustion engine comprising a fresh air system, which has an intake module,

(3) FIG. 2 shows a view from below onto the intake module,

(4) FIGS. 3 to 5 in each case show an isometric view onto a bearing bracket in an open state, in the case of different embodiments,

(5) FIGS. 6 and 7 in each case show an isometric view onto the bearing bracket in a collapsed state, in the case of the embodiments shown in FIGS. 4 and 5,

(6) FIG. 8 shows a cross section of the intake module in the area of a bearing bracket, wherein a housing of the intake module is illustrated in section, while the bearing bracket is reproduced in a side view.

DETAILED DESCRIPTION

(7) According to FIG. 1, an internal combustion engine 1 comprises an engine block 2, which has a plurality of cylinders 3, in which a combustion chamber 4 of the internal combustion engine 1 is in each case included. Four cylinders are illustrated here merely in an exemplary manner and without limiting the generality. In the case of an internal combustion engine 1, which is embodied as piston engine, a piston, which is not shown herein, is arranged in each cylinder 3 in a stroke-adjustable manner. Fresh air is supplied to the combustion chambers 4 via a fresh air system 5. A corresponding fresh air flow 6 is suggested by arrows. The fresh air system 5 is connected to the internal combustion engine 1 or to the engine block 2, respectively, or is fastened thereto, respectively, via an intake module 7. Provision is further made for an exhaust system 8, via which the combustion exhaust gases can be discharged from the combustion chambers 4. A corresponding exhaust gas flow 9 is suggested by arrows.

(8) In the shown example of FIG. 1, the internal combustion engine 1 is a charged internal combustion engine 1, because it is equipped with a charging station 10, which, in the example, is an exhaust gas turbocharger, which can also be identified with 10 hereinafter. The exhaust gas turbocharger 10 has a compressor 11 in the usual way, which is installed in the fresh air system 5, as well as a turbine 12, which is installed in the exhaust gas system 8. Compressor 11 and turbine 12 are drive-connected to one another for example by means of a common drive shaft 13. In the alternative, the internal combustion engine 1 can also be designed as non-charged internal combustion engine 1, thus as intake motor.

(9) According to FIGS. 1 and 2, the intake module 7 has a housing 14, which surrounds a distribution chamber 15. The housing 2 has an inlet opening 16 as well as a plurality of outlet openings 17. The fresh air flow 6 can enter into the distribution chamber 15 through the inlet opening 16. The fresh air flow 6 can escape from the distribution chamber 15 through the outlet openings 17 and can flow into the respective combustion chamber 4 via corresponding fresh air ducts 18, which are formed in the engine block 2. Gas exchange valves for controlling gas exchange processes are not illustrated here.

(10) The housing 14 has a flange section 19, with which the housing 14 or the intake module 7, respectively, can be fastened to the engine block 2 or can be connected to the internal combustion engine 1, respectively. Advantageously, the flange section 19 is integrally molded on the housing 14, is thus made from the same material therewith.

(11) According to FIG. 2, the intake module 7 is furthermore equipped with a control device 20, with the help of which the cross section, through which flow can pass, can be controlled at least in the case of one of the outlet openings 17. It is clear that in the case of another embodiment, the cross section, through which flow can pass, of any other opening can be controlled by means of the control device 20, so that the following description can accordingly also be read on an intake module 7 comprising other controllable openings.

(12) In the example of FIG. 2, two outlet openings 17 are assigned to each cylinder 3 or to each combustion chamber 4, respectively, wherein only one of these two outlet openings 17 can in each case be controlled with the help of the control device 20, while the respective other outlet opening 17 is uncontrolled, is thus permanently open. The uncontrolled outlet openings 17 are furthermore identified with 17a in FIG. 2. The outlet openings 17, which can be controlled or which are controlled, respectively, with the help of the control device 20, are furthermore identified with 17b in FIG. 2. The control device 20 has at least one control shaft 21, which supports a control valve 22 for at least one controlled outlet opening 17b and which is arranged on the control shaft 21 in a rotationally-fixed manner. For driving the control shaft 21 in a rotating manner, provision is made for a corresponding actuator 68. In the example of FIG. 2, all controllable outlet openings 17b are provided with a single, common control shaft 21, which in each case supports a control valve 22 for all of the controllable outlet openings 17b. While the control shaft 21 is advantageously made of a metal, the control valves 22 are preferably made of a plastic, wherein the control valves 22 can be injected directly against the control shaft 21.

(13) The control shaft 21 is mounted on the housing 14 such that it can rotate about a rotational axis 24. Advantageously, the control shaft 21 is embodied so as to be straight, so that the rotational axis 24 extends concentrically to the control shaft 21.

(14) FIG. 8 reflects a simplified cross section of the intake module 7 through the housing 14 in the area of the flange section 19 perpendicular to the rotational axis 24, namely in the area of such a bearing bracket 23, wherein the bearing bracket 23 itself is not illustrated in section, but in a side view, the viewing direction of which runs parallel to the rotational axis 24. As can be seen, the housing 14 has a corresponding bearing receiving portion 25 for each bearing bracket 23 in the area of the flange section 19 on a connection side 26 of the flange section 19, the respective bearing receiving portion 25 has an insertion opening 27, so that the respective bearing receiving portion 25 is open on the connection side 26. The connection side 26 serves to connect the housing 14 to the internal combustion engine 1 or to the engine block 2 thereof, respectively, wherein the connection side 26 faces the engine block 2 or is arranged on a side of the connecting flange 19, which faces away from the housing 14, respectively. The respective bearing bracket 23 is inserted into the bearing receiving portion 25 in an insertion direction 28, which is suggested by an arrow, through the insertion opening 27. The insertion direction 28 is thereby oriented perpendicular to the rotational axis 24.

(15) According to FIGS. 6 to 8, the respective bearing bracket 23 has, on its outside, two outer surfaces 29, which face away from one another with respect to a transverse direction 30, which is suggested by a double arrow in FIGS. 6 to 8. The transverse direction 30 runs perpendicular to the rotational axis 24 and perpendicular to the insertion direction 28. At each of these two outer surfaces 29, the bearing bracket 23 in each case has at least one positioning block 31, which projects away from the respective outer surface 29. Complementary to the positioning blocks 31, the bearing receiving portion 25, on its inside 32, has a guide contour 33 for aligning the bearing bracket 23 with respect to the transverse direction 30 and with respect to a longitudinal direction 34, which is in each case suggested by a double arrow in FIGS. 6 and 7 and which extends parallel to the rotational axis 24. The respective positioning block 31 has two flat longitudinal positioning surfaces 35, which face away from one another with respect to the longitudinal direction 34, and which extend parallel to one another and perpendicular to the longitudinal direction 34. Only the longitudinal positioning surfaces 35, which face the observer, can thereby be seen in each case in FIGS. 6 to 8. The longitudinal positioning surfaces 35 facing away from the observer are suggested with dashed reference lines in FIG. 7.

(16) On the inside 32, the bearing receiving portion 25 or the respective guide contour 33, respectively, has two flat longitudinal guide surfaces 36 for the respective positioning block 31, which can only be seen in FIG. 2. The longitudinal guide surfaces 36 face one another with respect to the longitudinal direction 34 and extend parallel to one another as well as perpendicular to the longitudinal direction 34. In the installed state, the longitudinal positioning surfaces 35 of the respective positioning block 31 abut flat against the respective longitudinal guide surface 36 in a flat manner.

(17) The respective positioning block 31 is here further equipped with a flat transverse positioning surface 37, which extends perpendicular to the transverse direction 30 and which thereby faces away from the remaining bearing bracket 23 with respect to the transverse direction 30. Complementary to these transverse positioning surfaces 37, the bearing receiving portion 25 has, on its inside 32 or on its guide contour 33, respectively, for the respective positioning block 31, a flat transverse guide surface 38, which extends perpendicular to the transverse direction 30 and which abuts against the respective transverse positioning surface 38 of the respective positioning block 31 in a flat manner. While the above-mentioned longitudinal poisoning surfaces 35 effect an alignment of the bearing bracket 23 with respect to the longitudinal direction 34 with the longitudinal guide surfaces 36, the transverse positioning surfaces 37, in connection with the transverse guide surfaces 38, effect an alignment of the bearing bracket 23 with respect to the transverse direction 30.

(18) In the examples shown herein, the respective bearing bracket 23 has, on each of its two outer surfaces 29, at least two such positioning blocks 31, which are spaced apart from one another in the insertion direction 28. To differentiate the two positioning blocks 31, the positioning block 31, which leads in response to the insertion of the bearing bracket 23 into the bearing receiving portion 25, can hereinafter be identified as leading or as preceding positioning block 31a, while the positioning block 31, which trails in response to the insertion, can hereinafter also be identified as trailing positioning block 31b. Advantageously, the two positioning blocks 31a, 31b are arranged so as to be aligned with one another on the respective outer surface 29 in the insertion direction 28. The leading positioning block 31a is thereby dimensioned so as to be smaller than the trailing positioning block 31b. Advantageously, the smaller leading positioning block 31a is dimensioned so as to be smaller than the larger, trailing positioning block 31b, both in the longitudinal direction 34 and in the transverse direction 30. According to FIG. 6, for example, a longitudinal distance 39, which the two longitudinal positioning surfaces 35 of the respective positioning block 31 have from one another, is smaller in the case of the leading positioning block 31a than in the case of the trailing positioning block 31b. A transverse distance 40, which is measured parallel to the transverse direction 30, of the respective transverse positioning surface 37 from the corresponding outer surface 29, from which the respective positioning block 31 projects, is further smaller in the case of the leading positioning block 31a than in the case of the trailing positioning block 31b.

(19) In the case of the embodiments shown herein, the leading positioning block 31a is arranged between the control shaft 21 and the trailing positioning block 31b with respect to the insertion direction 28, whereby the control shaft 21 can reach a particularly large distance from the connection side 26, which corresponds to a large penetration depth. This is advantageous for realizing comparatively large control valves 22.

(20) While the embodiment of the bearing bracket 23 shown in FIG. 6 only has two positioning blocks 31 on each outside 29, four such positioning blocks 31 are provided on each outside 29 in the case of the embodiment shown in FIG. 7. At least two such positioning blocks 31 are thus spaced apart from one another in the longitudinal direction 34 at the respective outer surface 29. In detail, provision is made for two leading smaller positioning blocks 31a, which are spaced apart from one another in the longitudinal direction 34, and for two trailing larger positioning blocks 31b.

(21) In the case of the bearing brackets 23 introduced here, provision is furthermore made that at least in the case of one of the positioning blocks 31, namely in each case in the case of the leading positioning block 31a, a flat stop surface 41, which leads in the insertion direction 28 and which extends perpendicularly to the insertion direction 28, is embodied. Complementary thereto, the bearing receiving portion 25, on its inside 32 for the respective positioning block 31, here for the respective leading positioning block 31a, has a flat counter stop surface 42, against which the stop surface 41 abuts in a flat manner, as soon as the bearing bracket 23 has reached a predetermined insertion depth in the bearing receiving portion 25.

(22) It can also be gathered from FIGS. 6 to 8 that the respective bearing bracket 23, on its outer surfaces 29, is only in contact with the housing 14 via these positioning blocks 31. It is attained through this that the positioning of the bearing bracket 23 relative to the housing 14 in the longitudinal direction 34 and in the transverse direction 30 only takes place via these positioning blocks 31. As can be seen, the positioning blocks 31 are dimensioned so as to be relatively small as compared to the total bearing bracket 23. If the contact in the area of the outer surfaces 29 only takes place indirectly, namely via the positioning blocks 31, as shown in FIG. 8, a space or gap is embodied outside of the positioning blocks 31 in the transverse direction 30 and/or in the longitudinal direction 34 between the outer surfaces 29 of the respective bearing bracket 23 and the inside 32 of the corresponding bearing receiving portion 25. Such spaces, which are identified with 69, are present on both outer sides of the bearing bracket 23 outside of the positioning blocks 31 in the transverse direction 30 in FIG. 8. It can further be seen that the bearing bracket 23 outside of the positioning blocks 31 also does not have a direct contact to the housing 14 in the insertion direction 28 between the leading front end and an opposite wall of the housing 14, which defines the bearing bracket 25, so that a space 70 is also located at this position.

(23) In the case of the examples of FIGS. 3 to 8 shown herein, provision is advantageously furthermore made for the respective positioning block 31 to have a length measured parallel to the longitudinal direction 34, which is smaller than a length of the bearing bracket 23, which is measured parallel to the longitudinal direction 34. As can be seen, the positioning block 31 in the longitudinal direction 34 is maximally half as long as the bearing bracket 23. Provision is additionally made here for the respective positioning block 31 to have a height, which is measured parallel to the insertion direction 28, which is smaller than a height of the bearing bracket 23, which is measured parallel to the longitudinal direction. The positioning block 31 is in particular maximally half as high here as the bearing bracket 23.

(24) Provision is further also made here for the respective positioning block 31 to be in each case spaced apart from two longitudinal ends of the bearing bracket 23, which are spaced apart from one another in the longitudinal direction 23. Provision is additionally made here for the respective positioning block 31 to be in each case spaced apart from two ends of the bearing bracket 23, which are spaced apart from one another in the insertion direction 28. When inserting the bearing bracket 23 into the bearing receiving portion 25, one of these ends leads in the insertion direction 28 and forms a front end of the bearing bracket 23, while the other end trails in the insertion direction 28 and forms a rear end of the bearing bracket 23. By spacing apart the respective positioning block 31 from the respective ends of the bearing bracket 23, a significantly smaller dimensioning results for the positioning block 31, which makes it possible to adhere to narrow tolerances at that location.

(25) The respective positioning block 31 is advantageously designed in the shape of a cuboid, so that it has at least four exterior preferably flat guide surfaces, namely one guide surface 37, which runs at right angles to the transverse direction 30 and which faces away from the bearing bracket 23, a guide surface 41, which runs at right angles to the insertion direction 28 and which leads in the insertion direction 28, and two guide surfaces 35, which run at right angles to the longitudinal direction 34 and which face away from one another.

(26) In addition or in alternative to the above-described features, the respective bearing bracket 23 has two bearing parts, namely a first bearing part 43 and a second bearing part 44. The first bearing part 43 has a first bearing section 45, against which the control shaft 27 abuts with a first circumferential section 46. The second bearing part 44 has a second bearing section 47, which is located opposite the first bearing section 45 and against which the control shaft 21 abuts with a second circumferential section 48, which, in turn, is located opposite the first circumferential section 46. Laterally adjoining the respective bearing section 45, 47, both bearing parts 43, 44 in each case have an inner surface 49, which face one another with respect to the transverse direction 30. On the respective inner surface 49, at least one flat positioning surface 50 is in each case embodied, which in each case extends perpendicular to the transverse direction 30. In the collapsed state of FIGS. 6 to 8 or in the installed state of FIG. 8, respectively, the respective positioning surface 50 of the first bearing part 43 abuts flat against at least one positioning surface 50 of the second bearing part 44. The two bearing parts 43, 44 are thus aligned optimally relative to one another with respect to the transverse direction 30.

(27) The positioning surfaces 50 of the two bearing parts 43, 44 adjoin one another in a positioning plane 58. Advantageously, the positioning surfaces 50 are thereby arranged on the bearing parts 43, 44 in such a way that the rotational axis 24 defined by the bearing bracket 43 is located in the positioning plane 58.

(28) According to FIGS. 3 to 5, the first bearing part 43 has, on its inner surface 49, at least one guide pin 51, which projects in the transverse direction 30. In the collapsed state of FIGS. 6 to 8, these guide pins 51 cannot be seen. According to FIGS. 3 to 5, the respective second bearing part 43 has, on its inner surface 49, at least one guide opening 52, which is oriented in the transverse direction 30 and which is formed complementary to the corresponding guide pin 51. In the collapsed state of FIGS. 6 to 8, the respective guide pin 51 is inserted into the corresponding guide opening 52 in the transverse direction 30. The guide openings 52 can also not be seen in FIGS. 6 to 8.

(29) Advantageously, the guide pins 51 are positioned systematically on the respective inner surface 49 in such a way that the respective guide pin 51 is surrounded by the respective positioning surface 50 and is in particular centered thereto. The positioning openings 52 on the second bearing part 44 are correspondingly also surrounded by the respective positioning surface 50 and are in particular centered thereto. As can be gathered from FIGS. 3 to 5 and 8, the respective positioning surface 50 is raised from the corresponding inner surface 49, thus spaced apart therefrom in the transverse direction 30.

(30) In the case of the embodiments shown here, at least two such positioning surfaces 50, which can be arranged spaced apart from one another in the insertion direction 28 and/or in the longitudinal direction 34, are in each case embodied on both bearing parts 43, 44 on the respective inner surface 49. FIG. 3 show an embodiment, in the case of which the respective bearing part 43, 44 has exactly two positioning surfaces 50, which are spaced apart from one another in the longitudinal direction 34 and which are also arranged so as to be aligned to one another with respect to the longitudinal direction 34. In the case of the embodiment shown in FIG. 4, provision is also in each case made on the two bearing parts 43, 44 for only two positioning surfaces 50, but which are spaced apart from one another in the insertion direction 28 in this case and which are also arranged aligned relative to one another in the insertion direction 28. In contrast, FIG. 5 shows an example, in the case of which the respective bearing part 43, 44 in each case has four positioning surfaces 50, wherein two are in each case spaced apart from one another in the insertion direction 28 and two are in each case spaced apart from one another in the longitudinal direction 34 and are arranged so as to be aligned relative to one another. In the case of the examples of FIGS. 3 to 5, provision is in each case made for exactly two guide pins 51 and for exactly two guide openings 52.

(31) As can also be gathered particularly clearly from FIG. 8, the first circumferential section 46, which is defined by the first bearing section 45 of the first bearing part 43 in the case of the embodiments of the bearing brackets 23 shown herein is in each case larger than 180 and is approximately 225 in the example. In contrast, the second circumferential section 48 defined by the second bearing section 47 of the second bearing part 44 is smaller than 180 and is approximately 120 in the shown example. The control shaft 21 can thus be clipped to the first bearing section 45, while the second bearing section 47 in the collapsed state of the bearing bracket 23 secures the control shaft 21 in the first bearing section 45. In the case of the example shown here, provision is furthermore made for the sum of first circumferential section 46 and second circumferential section 48 to be smaller than 360. The two bearing sections 45, 47 are further positioned relative to one another in such a way that a gap 54 is in each case formed in the circumferential direction 53 suggested in FIG. 8 by means of a double arrow of the control shaft 21 between the first bearing section 45 and the second bearing section 47, so that the bearing parts 43, 44 do not contact one another in the area of the bearing sections 45, 47. A projection 55, which enlarges the first bearing section 45 in the circumferential direction 53, is embodied on the first bearing part 53 in the area of the first bearing section 45, so that the projection 55 covers or defines, respectively, a part of the first circumferential section 46. In the area of the second bearing section 47, the second bearing part 44 has a recess 56, thus a depression or recess. The recess 56 leads to a reduction of the second circumferential section 48. The projection 55 further engages with this recess 56. The positioning of the projection 55 in the recess 56 is thereby designed in such a way that the two bearing parts 43, 44 also do not contact one another in the area of the projection 55 and of the recess 56. In fact, a gap 57 is also embodied at that location between projection 55 and recess 56.

(32) According to FIG. 2, the flange section 19 is equipped on its connection side 26, which faces the observer, with a seal 59, with the help of which the flange section 19 or the housing 14, respectively, is sealed against the engine block 2 in the assembled state, in order to avoid a leakage of the fresh air supplied to the combustion chamber 4 into the environment. To receive the seal 59, a sealing groove 60, which is formed complementary to the seal 59 and of which a section can also be seen in FIG. 8, is incorporated into the connection side 26 of the flange section 19. Advantageously, provision can now be made for at least one such bearing receiving portion 25 to be arranged in a section of the sealing groove 60 in such a way that the sealing groove 60 has a groove break 61 in the area of this bearing receiving portion 25. The bearing bracket 23, which is inserted into this bearing receiving portion 25, is now designed in such a way that, in the area of the sealing groove 60, it has a groove section 62, which completes the sealing groove 60 in the area of the groove break 61. Advantageously, the groove section 62 provided on the bearing bracket 23 completely supplements the sealing groove 60 in the area of the groove break 61, so that the seal 59 can come to rest on a groove base 63 of the sealing groove 60 without any gaps. Provision is furthermore made in the example of FIG. 8 for the two subsequent positioning blocks 31b to in each case have a holding surface 64, which faces away from the control shaft 21 and which are flush with the groove base 53 of the groove section 60 and thus form a section of the groove base 63 of the sealing groove 60. On principle, it is thus possible to also establish a continuous contact with the seal 59 in the area of the groove break 61. According to FIG. 2, the seal 59 has a circulation 65, which is guided around all outlet openings 17 and around all bearing receiving portions 25, which thus surrounds or encloses them, respectively. Inside this circulation 65, the seal 59 has a plurality of webs 66, which are in each case guided through a groove break 61, thus through a bearing receiving portion 25 and are in contact with the corresponding bearing bracket 23 at that location. During the preassembly of intake module 7, these webs 66 are used to secure the bearing brackets 23 inserted into the bearing receiving portions 25 on the flange section 19. In the attached state of the intake system 7, the webs 66 effect a prestressing of the bearing brackets 23 in the insertion direction 28, whereby the bearing brackets 23 in particular come to rest with their stop surfaces 41 on the counter stop surfaces 42 in a prestressed manner.

(33) As can be gathered from FIGS. 3 to 5, the two bearing parts 43, 44 can preferably be produced in a common injection molding tool. The two bearing parts 43, 44 can thereby be produced in one piece, but so as to be movably connected to one another. For this purpose, for example an integral hinge 67 can be embodied at the transition between the two bearing parts 43, 44. The one-piece production of the two bearing parts 43, 44 ensures that such bearing parts 43, 44, which were made from identical material and under identical production conditions, are always assembled to form a bearing bracket 23. The integral hinge 67 can be designed in such a way that it provides for a pivoting movement of the two bearing parts 43, 44 relative to one another about a pivot axis, which runs parallel to the rotational axis 24 and which is defined by the integral hinge 67, in order to form the respective bearing bracket 23 or in order to create the collapsed state of the bearing bracket 23, respectively. For assembly of the control device 20, the required bearing brackets 23 can thus be clipped with their first bearing parts 43 at the corresponding positions onto the control shaft 21 in the open state as shown in FIGS. 3 to 5. The bearing brackets 23 can subsequently be transferred into the closed state as shown in FIGS. 6 to 8, in which the respective second bearing part 44 is pivoted about the integral hinge 67 or about the pivot axis thereof, respectively, until the positioning surfaces 50 come to rest against one another. The guide pins 51 are hereby also inserted into the guide openings 52. Provision can be made thereby to dimension the integral hinge 67 in such a way that it is destroyed when assembling the two bearing parts 43, 44 into the bearing bracket 23 (collapsed), so that the two bearing parts 43, 44 are no longer connected to one another via the integral hinge 67 after the assembly or after collapsing the bearing bracket 23, respectively. FIGS. 6 to 8 show such embodiments, in the case of which the integral hinge 67 is destroyed or is no longer present, respectively, after collapsing the bearing bracket 23. In the alternative, the film hinge 67 can also be dimensioned in such a way that it is not destroyed by collapsing the bearing bracket 23, but creates a spring-elastic connection between the two bearing parts 43, 44, so that the bearing sections 45, 47 can be adjusted relative to one another when collapsing the bearing parts 43, 44 and so that an alignment of the two bearing sections 45, 47 relative to one another is not impeded by the integral hinge 67.