DE102013021611A1 - Internal combustion engine with a suction pipe - Google Patents

Abstract

The invention relates to an internal combustion engine (1) with a suction pipe (5) having a stationary with a cylinder of the internal combustion engine (1) stationary intake manifold (6) and at least one louver (8), wherein the louver (8) has a displaceable actuator (9) and a stationary suction pipe section (10), wherein the adjusting element (9) has a flow channel (11), through which in a connecting position of the adjusting element (9) produces a flow connection between the Saugrohrstutzen (6) and the Saugrohrabschnitt (10) is. It is provided that the adjusting element (9) is designed as a ball-actuating element (20).

Description

The invention relates to an internal combustion engine with a suction tube, which has a stationary with a cylinder of the internal combustion engine, fixed Saugrohrstutzen and at least one louver, wherein the louver comprises a displaceable actuator and a stationary Saugrohrabschnitt, wherein the actuating element has a flow channel through which in a connection position the adjusting element is a flow connection between the Saugrohrstutzen and the Saugrohrabschnitt is made.

The internal combustion engine has at least one cylinder, but preferably several cylinders. The cylinder is associated with the suction pipe, via which air, in particular fresh air, can be supplied to it. The suction pipe is so far connected to an inlet of the cylinder, in particular to an inlet valve of the cylinder, fluidically connected. Of course, the intake manifold can also be assigned to a plurality of cylinders of the internal combustion engine, that is to say that a plurality of cylinders of the internal combustion engine can be supplied with air simultaneously via the intake manifold. Alternatively, it is also conceivable that the internal combustion engine has a plurality of cylinders, wherein a plurality of these cylinders, in particular all cylinders, each associated with such a suction pipe. In a further embodiment of the internal combustion engine, the cylinder or each cylinder may have a plurality of inlets or intake valves, wherein each of these inlets is associated with a suction pipe.

The suction tube is constructed in several parts and consists of the Saugrohrstutzen and at least one louver. The intake manifold is arranged stationary and fluidly connected to the cylinder of the internal combustion engine or its inlet. The louver closes against the intake manifold against the flow direction, so it is located upstream of the Saugrohrstutzens. The louver has the actuator and the Saugrohrabschnitt. The Saugrohrabschnitt is stationary as well as the Saugrohrstutzens. The fluidically arranged between the intake manifold and the Saugrohrabschnitt actuator, however, is displaced, in particular rotatable about an axis of rotation.

In the adjusting element, a flow channel is provided, through which in the connecting position of the actuating element of the Saugrohrstutzen and the Saugrohrabschnitt are fluidly connected to each other. In particular, it is thus provided that in the connection position of the actuating element, the air to be supplied to the cylinder passes through the Saugrohrabschnitt in the flow channel and then into the intake manifold, from which it can flow into the cylinder of the internal combustion engine. Conversely, if the actuator is not in the connection position, the air may preferably enter directly into the intake manifold, so does not previously flow through the Saugrohrabschnitt and the flow channel. Accordingly, different lengths of the suction tube can be adjusted by means of the louver.

From the prior art, for example, the publication DE 696 07 212 T2 known. This describes a valve assembly in an intake system of an internal combustion engine, which comprises a separate intake manifold for each engine cylinder, each having a first manifold portion extending between the intake valve of the respective cylinder and a first air distribution chamber, and a second manifold portion which connects between the first air distribution chamber and a second air distribution chamber on which a valve arranged for each cylinder in a first use position connects the intake manifold sections together and in a second deployment position opens these intake manifold sections to the first air distribution chamber, such that the valves in dependence on the engine speed by means of control means be actuated simultaneously between these two insertion positions. In this case, a designed as a connecting line valve body is to be arranged for each cylinder, which is rotatable about an axis and in its first use position establishes a tight connection between the two manifold sections and is located in a second use position away from the ends of the manifold sections so that they are exposed.

Known embodiments of internal combustion engines, which have an actuating element are complex and unfavorable in terms of both their flow characteristics and the necessary installation space.

It is therefore an object of the invention to provide an internal combustion engine which has advantages over the known prior art, in particular has better flow characteristics and / or can be realized with less space.

This is inventively achieved with an internal combustion engine with the features of claim 1. It is provided that the actuating element is designed as a ball actuator. This means that the adjusting element is at least partially designed as a ball, so that its surface or outer contour is at least partially present as a spherical cap. For example, the outer contour of the actuating element in the circumferential direction seen with respect to a rotational axis of the actuating element with a proportion of at least 10%, at least 20%, at least 30%, at least 40% or at least 50% kugelkalottenförmig. Compared with known internal combustion engines, such an embodiment of the actuating element with a simpler adjustment mechanism and thus lower costs, reduced weight and smaller space can be realized.

A further embodiment of the invention provides that the intake manifold has on its side facing away from the cylinder a Saugrohrstutzeneinlass, which is arranged in a collection chamber. The fixed intake manifold is, as already explained on one side to the cylinder or its inlet fluidly connected and thereby arranged stationary. On the other side, which is therefore facing away from the cylinder fluidically, the Saugrohrstutzeneinlass is provided, which is arranged in the collecting chamber or opens into this.

This means that there is an immediate flow connection between the collecting chamber and the Saugrohrstutzeneinlass and according to the Saugrohrstutzen when the actuator is not arranged in the connecting position, but is for example in a release position. Accordingly, there is a shorter flow connection between the collecting chamber and the cylinder of the internal combustion engine. The collection chamber is associated, for example, with a plurality of cylinders of the internal combustion engine, for example all cylinders of a cylinder bank. This means that all intake manifolds of the cylinder associated with the collection chamber or their respective intake manifold inlet are arranged in the collection chamber or open into it.

A preferred embodiment of the invention provides that the actuating element has an inlet connection and an outlet connection, wherein the inlet connection is enclosed by an inlet connection sealing surface and the outlet connection by an outlet connection sealing surface, wherein the inlet connection sealing surface and / or the outlet connection sealing surface are spherical cap-shaped. The inlet port and the outlet port are fluidly connected to each other by the flow channel of the actuator. In the connecting position of the adjusting element, the inlet connection to the suction pipe section and the outlet connection to the suction pipe socket or its Saugrohrstutzeneinlass sealingly, so that by the adjusting element, a flow connection between these elements is made. To produce this sealed connection, the inlet connection sealing surface enclosing the inlet connection bears sealingly against the suction pipe section and / or the outlet connection sealing surface enclosing the outlet connection adjoins the suction pipe connection piece. To form the actuating element as a ball-positioning element, the inlet connection sealing surface, the outlet connection sealing surface or both are spherical-cap-shaped, thus forming a region of a spherical surface into which the respective connection, ie either the inlet connection or the outlet connection, opens.

A development of the invention provides that the inlet connection sealing surface and the outlet connection sealing surface lie in an imaginary spherical surface. Correspondingly, the inlet connection sealing surface and the outlet connection sealing surface have the same curvature and, in addition, the same distance or radius from a common sphere center of the spherical surface. Particularly preferably, a rotational axis of the actuating element extends through this ball center. In a particularly preferred embodiment, the adjusting element in the circumferential direction between the inlet connection sealing surface and the outlet connection sealing surface is likewise designed in the shape of a spherical cap, wherein the outer contour of the adjusting element also lies on the imaginary spherical surface in this region. It may therefore be provided, for example, that the adjusting element is spherical in the circumferential direction with respect to the axis of rotation to a large extent.

A particularly preferred embodiment of the invention provides that the adjusting element is rotatably mounted about a center axis of the imaginary spherical surface. The center point axis runs, as already indicated above, through the sphere center of the imaginary spherical surface. The axis of rotation of the actuating element thus corresponds to this center point axis or passes through the center of the sphere. In such an embodiment, a particularly simple actuating mechanism and good flow properties of the air flowing through the intake manifold are ensured.

In such an embodiment, it can be provided that the inlet connection sealing surface and the outlet connection sealing surface are part of a common sealing surface, which extends from the inlet connection to the outlet connection along the imaginary spherical surface, ie is present as a spherical cap. If now the adjusting element about its axis of rotation, according to the midpoint axis, relocated verlungswese rotated, so the common sealing surface is preferably always on the Saugrohrabschnitt, in particular at the outlet opening of the Saugrohrabschnitts or the Auslassöffnungsdichtfläche. This concern is particularly in the connection position and the release position and preferably in all lying between these two positions positions intended. On the side opposite the common sealing surface with respect to the axis of rotation of the adjusting element, however, an outer contour of the actuating element may be present, which deviates from the imaginary spherical surface, in particular in the radial direction in the direction of the axis of rotation. Accordingly, the dimensions of the actuating element, in particular the radius, at this point are lower than in the region of the common sealing surface.

A further preferred embodiment of the invention provides that the intake manifold has a Saugrohrstutzendichtfläche enclosing the Saugrohrstutzeneinlass, which is complementary to the Auslassanschlussdichtfläche. In order to ensure a tight flow connection between the intake manifold and the actuator or its flow channel in the connecting position of the actuating element, the Saugrohrstutzendichtfläche should abut in the connecting position on the outlet port sealing surface. Accordingly, this is provided complementary to the Saugrohrstutzendichtfläche, so that a full-surface concern of the sealing surfaces is ensured together.

In a further embodiment of the invention, it is provided that the suction pipe section has an inlet opening and an outlet opening, wherein the outlet opening is enclosed by an outlet opening sealing surface, which is formed to be complementary to the inlet connection sealing surface. Analogous to the above statements for the intake manifold or its Saugrohrstutzendichtfläche the Saugrohrabschnitt has the Auslassöffnungsdichtfläche, which should preferably rest in the connecting position of the actuating element over the entire surface of the inlet connection sealing surface. The outlet opening sealing surface holds the outlet opening of the suction pipe section. On its side opposite the outlet opening, the suction pipe section has the inlet opening. Through this, air can enter the suction pipe section and flow in the direction of the outlet opening. The inlet opening is particularly preferably made aerodynamic. For this purpose, it expands, for example, in the direction away from the outlet opening, so it is funnel-shaped in this respect.

A further embodiment of the invention provides that the inlet opening is also present in the collection chamber. This means that both the Saugrohrstutzen inlet of the Saugrohrstutzens and the inlet opening of the Saugrohrabschnitts are arranged in the collection chamber. Accordingly, the air from the collecting chamber depending on the position of the actuating element either directly into the intake manifold through its intake manifold inlet or alternatively - if the actuator is in the connecting position - through the louver, so by the Saugrohrabschnitt and the actuator in the Saugrohrstutzen and get from there into the cylinder of the internal combustion engine.

A particularly preferred embodiment of the invention provides that a plurality of aerodynamically connected in series louvers are provided. By this is to be understood that the intake manifold or each intake manifold of the internal combustion engine fluidly upstream of several spoilers. In this way, depending on the positions of the adjusting elements of these multiple louvers, several different lengths of the intake manifold can be realized.

Finally, a plurality of Saugrohrstutzen be provided, each Saugrohrstutzen is assigned at least one air guide, wherein the adjusting elements are operatively connected to the common displacement. As already explained, the plurality of intake manifolds may, for example, be associated with a plurality of cylinders or a plurality of inlets of the cylinder or cylinders. Each of these Saugrohrstutzen is now assigned at least one air guide according to the foregoing. The control elements of these louvers are operatively connected to each other for common displacement. This means that with a displacement of one of the adjusting elements, the other adjusting elements are also displaced, in particular in the same position. In this way, only a single actuator is necessary for adjusting a plurality of adjusting elements.

The invention will be explained in more detail with reference to the embodiments illustrated in the drawings, without any limitation of the invention. Showing:

1 a sectional view of a portion of an internal combustion engine having a suction tube, which has a Saugrohrstutzen and an air guide device with an actuating element and a Saugrohrabschnitt, wherein the actuating element is in a connection position,

2 the internal combustion engine, wherein the actuating element is in a release position,

3 a detailed view of a plurality of suction pipes, wherein the actuating element is in each case in the connection position,

4 the detailed view of the suction pipes, wherein the actuating element is in the release position, and

5 a schematic representation of a plurality of suction pipes, which each have the Saugrohrstutzen and two louvers, wherein the control elements of the louvers are arranged in different positions to adjust different lengths of the suction pipe.

The 1 shows a cross section through an internal combustion engine 1 , in particular by a cylinder head 2 the internal combustion engine 1 , The internal combustion engine 1 has two cylinder banks, so that the cylinder head via two collecting chambers 3 and 4 features, with each collection chamber 3 respectively 4 associated with one of the cylinder banks. The following only refers to the first cylinder bank with the collection chamber 3 received. The second cylinder bank or its collection chamber 4 However, it is designed analogously. Of course, the embodiment described below is the internal combustion engine 1 also only with a cylinder bank and corresponding to a single collection chamber 3 realizable. Basically, the internal combustion engine 1 have any number of collection chambers.

The internal combustion engine points in the collection chamber 3 at least one suction tube 5 on. Again, it should be noted that the internal combustion engine 1 basically can have any number of suction pipes. For example, each cylinder of the internal combustion engine 1 at least one suction tube 5 assigned. However, it can also each cylinder several suction pipes 5 or more cylinders each have a suction pipe 5 be assigned. Preferably, at least some of the suction pipes open 5 , in particular all suction pipes 5 , in the collection chamber 3 one.

The suction tube 5 has a Saugrohrstutzen 6 on, the stationary in the collection chamber 3 is arranged. The intake manifold 6 is preferably permanently connected to an inlet of the respective cylinder, in particular an inlet valve of the cylinder, flow-connected. The intake manifold has on its side facing away from the cylinder a Saugrohrstutzeneinlass 7 up in the collection chamber 3 is present. Next to the intake manifold 6 has the intake manifold 5 a louver 8th on that over an actuator 9 and a Saugrohrabschnitt 10 features. The actuator 9 has a flow channel 11 on, which has an inlet port 12 with an outlet port 13 fluidically connects. The suction pipe connection 10 now has an inlet opening 14 and an outlet opening 15 , The inlet opening 14 is in the collection chamber 3 arranged, so far as the Saugrohrabschnitt 10 enters into this. The inlet opening 14 is preferably designed flow-optimized and, for example, funnel-shaped.

The actuator 9 is designed such that it can be displaced, in particular about an axis of rotation 16 (not shown here) is rotatable. The inlet connection 12 of the actuating element 9 is from an inlet port sealing surface 17 , the outlet port 13 from an outlet port sealing surface 18 edged. The inlet connection sealing surface 17 and the outlet port sealing surface 18 are spherical cap-shaped and are preferably in an imaginary spherical surface 19 , In the cross-sectional illustration of the internal combustion engine shown here by the actuator 9 it becomes clear that the inlet connection sealing surface 17 and the outlet port sealing surface 18 in a common spherical cap surface or in a common sealing surface, which is the imaginary spherical surface 19 equivalent. In that regard, the actuator is 9 as a ball actuator 20 designed. Particularly preferably, the axis of rotation corresponds 16 a center axis of this imaginary spherical surface 19 ,

The intake manifold 6 has a Saugrohrstutzeneinlass 7 enclosing intake manifold sealing surface 21 on. This is complementary to the outlet port sealing surface 18 educated. Similarly, the outlet opening 15 of the suction pipe section 10 from an outlet port sealing surface 22 bordered to the inlet port sealing surface 17 is designed complementary.

The 2 now shows the already known internal combustion engine 1 so that reference is made to the above statements. The actuator 9 However, it is now not in the connection position, but in a release position. For this purpose it is about the axis of rotation 16 turned. In this release position is the actuator 9 such that between the Saugrohrabschnitt 10 and the intake manifold 6 none over the actuator 9 existing flow connection is present. Rather, it is now possible for air to escape from the collection chamber 3 directly into the intake manifold 6 or its intake manifold inlet 7 flow. Accordingly, a shorter inflow through the suction pipe 5 realized as in the connection position. The position of the control element 9 For example, it depends on an operating parameter of the internal combustion engine 1 determined, in particular from the operating point.

The 3 shows a detailed view of several suction pipes 5 wherein, for example, each intake manifold 5 a cylinder of the internal combustion engine 1 assigned. With regard to the design of the suction pipes 5 Reference is made to the above statements. The control elements 9 the louvers 8th are each in their connection position. It can be clearly seen that the control elements 9 over a wave 23 are actively linked to the common shift. Accordingly, by means of a single actuator, a simultaneous displacement of multiple actuators 9 will be realized. The wave 23 is about the axis of rotation 16 the control elements 9 rotatably mounted.

The 4 again shows the detailed view of the multiple suction pipes 5 , where the adjusting elements 9 but now in their release position. With regard to the design of the suction pipes 5 Reference is made to the above statements.

The 5 shows a schematic representation of several suction pipes 5 in an alternative embodiment of the internal combustion engine 1 , With regard to the basic design of the suction pipes 5 reference is made to the above statements. The suction pipes 5 are, as also explained, the internal combustion engine 1 assigned. The difference, however, lies in the fact that every intake manifold 5 several louvers 8th , in particular a first air guiding device 24 and a second air guiding device 25 , having. Each of these louvers 24 and 25 has as explained above about the actuator 9 and the Saugrohrabschnitt 10 , The louvers 24 and 25 are arranged in series. This means that fluidically the first louver 24 to the intake manifold 6 and the second air guiding device 25 to the first air guiding device 24 or its Saugrohrabschnitt 10 connected.

Depending on the positions of the control elements 9 the louvers 24 and 25 can now have several different lengths of the suction tube 5 will be realized. Far left is in the 5 For example, shown that the actuator 9 the first louver 24 is in the release position. Accordingly, air can according to the arrows 26 in the intake manifold 6 flow. In the middle of a configuration is shown, in which the actuator 9 the first louver 24 in the connection position and the actuator 9 the second air guiding device 25 is arranged in the release position. Accordingly, the air flows according to the arrows 27 through the first air guiding device 24 and the intake manifold 6 in the direction of the cylinder. On the far right, however, a configuration is shown in which the control elements 9 Both louver 24 and 25 are arranged in the connection position. The air must be correspondingly both louvers 24 and 25 to flow through to the intake manifold 6 and thus reach the cylinder. There is a flow corresponding to the arrows 28 in front.

LIST OF REFERENCE NUMBERS

1

Internal combustion engine

2

cylinder head

3

plenum

4

plenum

5

suction tube

6

short conduits

7

Saugrohrstutzeneinlass

8th

Cowl

9

actuator

10

suction pipe

11

flow channel

12

inlet port

13

outlet

14

inlet port

15

outlet

16

axis of rotation

17

Inlet port sealing surface

18

Auslassanschlussdichtfläche

19

spherical surface

20

Ball Control

21

Saugrohrstutzendichtfläche

22

Auslassöffnungsdichtfläche

23

wave

24

1. Air guiding device

25

2. Air guiding device

26

arrow

27

arrow

28

arrow

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 69607212 T2 [0005]

Claims (10)

Internal combustion engine ( 1 ) with a suction tube ( 5 ), the one with a cylinder of the internal combustion engine ( 1 ) flow-connected, fixed intake manifold ( 6 ) and at least one air guiding device ( 8th ), wherein the louver ( 8th ) a displaceable actuating element ( 9 ) and a stationary suction pipe section ( 10 ), wherein the actuating element ( 9 ) a flow channel ( 11 ), by which in a connecting position of the actuating element ( 9 ) a flow connection between the intake manifold ( 6 ) and the Saugrohrabschnitt ( 10 ), characterized in that the actuating element ( 9 ) as a ball control element ( 20 ) is trained. Internal combustion engine according to claim 1, characterized in that the intake manifold ( 6 ) on its side facing away from the cylinder a Saugrohrstutzeneinlass ( 7 ), which in a collection chamber ( 3 ) is arranged. Internal combustion engine according to one of the preceding claims, characterized in that the actuating element ( 9 ) an inlet port ( 12 ) and an outlet port ( 13 ), wherein the inlet port ( 12 ) from an inlet port sealing surface ( 17 ) and the outlet port ( 13 ) from an outlet port sealing surface ( 18 ), wherein the inlet connection sealing surface ( 17 ) and / or the outlet connection sealing surface ( 18 ) are spherical cap. Internal combustion engine according to one of the preceding claims, characterized in that the inlet connection sealing surface ( 17 ) and the outlet port sealing surface ( 18 ) in an imaginary spherical surface ( 19 ) lie. Internal combustion engine according to one of the preceding claims, characterized in that the actuating element ( 9 ) about a midpoint axis ( 16 ) of the imaginary spherical surface ( 19 ) is rotatably mounted. Internal combustion engine according to one of the preceding claims, characterized in that the intake manifold ( 6 ) a the suction pipe socket inlet ( 7 ) enclosing intake manifold sealing surface ( 21 ) facing the outlet port sealing surface ( 18 ) is formed complementary. Internal combustion engine according to one of the preceding claims, characterized in that the suction pipe section ( 10 ) an inlet opening ( 12 ) and an outlet opening ( 13 ), wherein the outlet opening ( 13 ) from an outlet port sealing surface ( 22 ) connected to the inlet port sealing surface ( 17 ) is formed complementary. Internal combustion engine according to one of the preceding claims, characterized in that the inlet opening ( 14 ) also in the collection chamber ( 3 ) is present. Internal combustion engine according to one of the preceding claims, characterized in that a plurality of aerodynamically connected in series air guiding devices ( 8th . 24 . 25 ) are provided. Internal combustion engine according to one of the preceding claims, characterized in that a plurality of intake manifolds ( 6 ) are provided, each Saugrohrstutzen ( 6 ) at least one air guiding device ( 8th ), wherein the control elements ( 9 ) are operatively linked to each other for joint transfer.

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