DE102004005480B4 - Switching flap for intake manifold - Google Patents

Abstract

Intake manifold flap assembly (1; 1 '; 1' '; 1' '') for an internal combustion engine, comprising: - a plurality of intake manifold flaps (4; 4 '') rotatably movable about a common axis of rotation, - in the region of each Suction tube flap (4, 4 '') is a Drehachsenteilstück (3; 6) provided - the Drehachsenteilstücke (3; 6) via connecting portions (3; 7) rigidly connected to each other, - the common axis of rotation runs in an edge region of each intake manifold flap ( 4, 4 ''). characterized in that the connecting portions (7) are formed as cranked portions of a Saugklappenwelle (3 ', 3' ', 3' ''), the cranked portions of the Saugklappenwelle disc-shaped bearing portions (11), and the outer diameter of the disc-shaped bearing portions (11 ) is at least twice as large as the height of the cranking of the suction flap shaft (3 '' ')

Description

The invention relates to a Saugrohrklappeneinrichtung and a suction tube, an internal combustion engine and a motor vehicle with such a Saugrohrklappeneinrichtung.

In the prior art intake manifolds for internal combustion engines are known in which a plurality of intake manifold flaps are provided rotatably movable to change the free flow cross-section of the suction pipe. In the EP 1 279 811 A2 For this purpose, a plurality of switching flaps is actuated so that an inlet channel of an internal combustion engine is completely or partially closed. From the DE 199 18 777 A1 an embodiment is known in which the switching flaps are mounted on a continuous horizontal shaft, the switching flaps carries several cylinders in line. The EP 1 291 504 A2 shows a plurality of switching flaps or intake manifold flaps, which are individually stored for themselves so that a coincident axis of rotation is formed. The arrangement according to the EP 1 291 504 A2 is very complicated.

From the DE 695 05 763 T2 For example, an air stub for internal combustion engines is known, particularly with at least two intake valves on a combustion chamber, the air stub being of the type comprising for each combustion chamber at least two air supply lines, at least one of which is selectively and at least partially controlled by a throttle device, especially for low engine loads is closed, wherein the throttle body comprises a flap which is pivotally mounted about an axis disposed substantially transversely to the selectively closed conduit and is pivoted from one to the other of two positions, one of which is a partially closed position at least Line and the other is an open position of the line, in which the flap, is folded by the operation of a drive means in a receptacle.

From the DE 101 25 053 A1 a flap device for influencing a flow cross-section in a media-carrying line is known, with a disposed in the media-carrying line control and at least one shaft piece having a first and a second end, wherein the shaft piece is rotatably mounted to the media-carrying line and the control at the first end of the Shaft piece is torsionally rigid fastened, wherein the shaft piece is cranked in a region between the first and the second end.

In addition, it is conceivable not to arrange the switching flaps on a horizontal shaft, but to provide a vertical shaft for each switching flap. With such a construction, the construction cost compared to a continuous horizontal shaft is significantly higher, since the vertical waves must be stored individually and synchronized via a linkage.

Internal combustion engines equipped with intake manifold flapper devices known in the art often have poor efficiency. In addition, the high structural complexity of disadvantage that makes it equipped with very expensive combustion engines.

It is an object of the invention to provide a motor vehicle with an internal combustion engine, which has a low consumption, wherein an intake manifold inserted into the internal combustion engine device is easy to manufacture and operate.

This object is achieved according to the invention by the subject matter of the independent claims. Advantageous developments emerge from the respective dependent claims.

The invention provides a Saugrohrklappenanordnung ago, in which a plurality of intake manifold flaps are rotatably movable on a common axis of rotation. For this purpose, a rotary axis section is provided in the region of each suction flap. The individual rotary axis sections can be rigidly connected to one another via connecting sections. The connection can be rigid, for example, by a one-piece design of the connecting portions and the Drehachsenteilstücke. It can also be provided a zusammensteckbare axis of rotation of individual connecting portions and individual rotary axis sections. The axis of rotation may also be partially rotatable, but then there is a stop, which is a rigid boundary. According to the invention, the common axis of rotation extends in an edge region of each intake manifold flap. By such a design, a switching flap or a Saugrohrklappe pivot in a particularly simple manner, it being ensured that a large portion of a free flow cross-section of the suction pipe can be closed. This arrangement of the axis of rotation to the surface of the intake manifold flap ensures that the intake manifold flap can be swung almost completely or even completely out of the free flow cross section of the suction pipe. In this way, it can be avoided, in particular, that the rotary axis sections run in the region of the free flow cross section of the suction tube. Compared to such arrangements, the invention provides an extended free flow area in the intake manifold. As a result, no disturbances of the gas flow inside the suction pipe are also generated. With the invention a low construction cost and a robust design of a continuous horizontal shaft is achieved. Thus, particularly favorable flow characteristics of the arrangements of the intake manifold flaps in the duct wall of a suction pipe are achieved.

The invention provides for the actuation of the switching flaps before a horizontal shaft, which is arranged above the air ducts of the suction pipe. Permanently connected to this shaft are several switching flaps or intake manifold flaps. The terms "switching flaps" or "intake manifold flaps" are synonyms here. These intake manifold flaps can be pivoted by turning the horizontal shaft downwards into the corresponding air-conveying duct of the intake manifold. In this position they close the channel completely or partially. In the open position, the flaps are at least partially in niches above the channels. There they can form the upper channel wall, where they do not disturb the flow or only very slightly.

By a suitable choice of the division of the intake manifolds, the shift shaft can be placed on the parting line of the suction pipe. Then it is possible to carry out the shaft and the flaps located on it in one piece. For assembly then only the shaft needs to be inserted into one of the two intake manifolds. The other intake manifold then closes this arrangement.

If the mounting screws of the intake manifold are located in the escape above the intake ducts, then a straight execution of the horizontal shaft is often not possible. In this case, the shaft can be performed around the provided for receiving the mounting screws Schenkelpfeifen herumgekröpft. Advantageously, the crank is rotated by 45 ° to the intake manifold flap.

Deviating from this, the shaft can also be arranged above the fastening screws. The resulting distance of the open flaps to Saugrohrwandung can then be compensated by a corresponding design of the flaps. Thus, it is conceivable to carry out the flaps with an increased thickness or thickness which is greater than, for example, 5% of their smallest dimension transverse to the thickness. It is also possible to suitably crank the intake manifold flap so that the intake manifold can be sufficiently closed.

With a very narrow arrangement of the ducts of the suction pipe, the space for a cranking and the necessary storage can not be sufficient. In such a case, one can arrange the storage coaxial with the crank by the storage is carried out on a diameter which is greater than twice the crank. With very little space, the storage can also be designed so that the formed as a disc bend or bearing of the horizontal wave forms a part of the channel wall of the suction tube equal.

The invention provides advantages in assembly, as compared to the devices known in the art significantly fewer parts are necessary. This also reduces the handling effort. It can be saved components and functional elements, whereby the construction cost decreases. Also, the number of bearings, the joints and the joints can be reduced, which benefits the reliability. It also allows the use of low-cost materials, in particular plastic can be used instead of steel previously. A Saugrohrklappeneinrichtung made of plastic can be very accurate and inexpensive to produce. Due to the increased reliability, it is possible to dispense with a special electronic function monitoring the Saugrohrklappeneinrichtung. Compared to the devices known in the prior art, a smaller number of bearings is provided, which further reduces the operating forces and energy consumption.

The invention is illustrated in more detail in the drawing with reference to several embodiments.

1 shows a cross section through a first inventive suction tube with a Saugrohrklappeneinrichtung a first position,

2 shows the suction pipe 1 , wherein the Saugrohrklappeneinrichtung is in a second position.

3 shows a different view of the suction tube 1 .

4 shows a plurality of intake manifold flaps of a second intake manifold flap assembly according to the invention in a perspective view,

5 shows a second Saugrohrklappenanordnung with the intake manifold flaps 4 .

6 shows a perspective view of the Saugrohrklappenanordnung 5 .

7 shows the Saugrohrklappenanordnung 6 with the intake manifold flaps in a different position,

8th shows a cross section through a further Saugrohrklappenanordnung invention,

9 shows a Saugrohrklappe another Saugrohrklappenanordnung invention in a perspective view and

10 shows a further Saugrohrklappenanordnung according to the invention with the intake manifold flap 9 ,

1 . 2 and 3 show a "variant 1 "An intake manifold flap assembly according to the invention 1 , which is provided on a not shown in detail in this view internal combustion engine of a motor vehicle also not shown in detail. The intake manifold flap assembly 1 is divided into a suction tube 2 , which is made of plastic or aluminum, and in a Saugrohrklappenwelle 3 with several Saugrohrklappen arranged thereon 4 , A suction tube cover 5 the only in 1 and in 2 can be seen, closes the Saugrohklappenanordnung 1 , In an embodiment not shown here, the intake manifold cover 5 in one piece with the suction tube 2 educated.

How to be especially in 3 can see well, the free flow cross-section of the suction pipe is divided 2 in two parts, of which one part by a suction tube flap 4 can be closed. This is done by rotation of the intake manifold flap shaft 3 What you are particularly good at 1 and in 2 able to see. In the in 1 and 3 shown position of the intake manifold flap shaft 3 closes the intake manifold flap 4 each one of the left-side regions of the free flow cross-section of the suction pipe 2 , In this position is the intake manifold flap 4 by a rotation of the intake manifold flap shaft 3 turned down.

2 shows the same arrangement with open free flow cross-section of the suction pipe 2 ,

How to be particularly good in 2 is seen by the rotation of the Saugrohrklappenwelle 3 the intake manifold flap 4 up into an area outside the free flow cross section of the suction pipe 2 brought. In this position forms the intake manifold flap 4 together with the inner wall of the suction tube 2 a smooth transition, which has only a very low flow resistance. Thus, the intake manifold is located 4 in a niche above the free intake manifold in the intake manifold 2 , wherein the niche by the special design of Saugrohrdeckels 5 or of the suction tube 2 provided. In an embodiment not shown here, the niche is due to the special design of the suction tube 2 self-provided In these views you can see especially well that the common axis of rotation inside the intake manifold flap shaft 3 in the edge area one each of the intake manifold flaps 4 runs. An edge region is here so the outer contour in plan view in the side view of each intake manifold 4 as they are in the 1 to 3 are shown.

4 . 5 . 6 and 7 show a "variant 2 "Of the intake manifold flap assembly according to the invention. Parts that those in 1 to 3 correspond, have the same reference numerals. For this similar parts with appropriate function, reference numerals have those in 1 to 3 correspond, but with an apostrophe "'" provided.

4 shows a perspective view of a Saugklappenwelle 3 ' , on the intake manifold flaps 4 are arranged. The intake manifold flap shaft 3 ' is divided into three axes of rotation 6 , wherein at each turning axis part 6 an intake manifold flap 4 is attached. The rotary axis parts 6 are through connecting sections 7 rigidly connected.

5 . 6 and 7 illustrate the use of Saugrohrklappenwelle 3 ' on a suction pipe 2 , which is attached to an internal combustion engine. How to get in 6 and 7 can see particularly well, is ever a turning axis part 6 below the niche in the intake manifold 2 rotatably mounted so that the intake manifold flap 4 inside the suction pipe 2 can be rotated, as shown by "variant 1 Has been explained. connecting sections 7 ensure that screw pipes 8th with screw holes 9 in the area between individual channels of the suction pipe 2 can be arranged, while still a one-piece connection between the individual pivot axis parts 6 is guaranteed. In this way, all intake manifold flaps 4 at the same time by an actuator, not shown in these views, at an actuating end 10 be operated. The intake manifold flaps 4 are at an angle of approximately 45 ° with respect to the cranks between each a pivot axis part 6 and a connection section 7 arranged. This one is best in 4 see.

8th shows a cross section through another Saugrohrklappenanordnung 1'' , The intake manifold flap assembly 1'' This corresponds essentially to the Saugrohrklappenanordnungen 1' and 1 from the previous figures. The same parts therefore have the same reference numerals. Corresponding parts which have a similar function are indicated by the same reference numerals, but with two apostrophes "''" provided. How to get in 8th especially good compared with 1 and 2 can determine, is the intake manifold flap shaft 3 '' higher than the intake manifold flap shaft 3 in 1 and 2 , This allows the suction tube 2 '' to provide an internal combustion engine, for the inventive "variant 2 "Is thought. The intake manifold flap shaft 3 '' runs above the screw pipes 8th and allows easy installation of the suction tube 2 '' , so that the intake manifold flap 4 '' the free flow area of the suction pipe 2 '' can completely close. For this purpose, the intake manifold flap 4 '' a little stronger than the intake manifold flap 4 out 1 and 2 , Accordingly, the niche is in the intake manifold 2 '' higher trained, so that an enlarged niche for receiving the intake manifold 4 '' arises. This is indicated by a dashed line representing the position of the intake manifold flap 4 '' inside the intake manifold cover 5 '' shows, if this from the free flow cross-section of the suction pipe 2 '' is unfolded.

9 and 10 show a "variant 4 "An intake manifold flap assembly according to the invention 1''' ,

9 shows a perspective view of a Saugrohrklappenwelle 3 ''' , which in essential parts of the Saugrohrklappenwelle 3 ' out 4 equivalent. The same parts are also provided with the same reference numbers. Parts with a similar function have the same reference number but are provided with three apostrophes "'''". The intake manifold flap shaft 3 ''' is divided into an intake manifold flap 4 at a turning axis part 6 is appropriate. There are also two connection sections 7 provided, which each have a bearing disc 11 with the next spin axis part 6 keep in touch. This causes a rigid connection.

10 illustrates the installation of the Saugrohrklappenwelle 3 ''' in the intake manifold 2 ''' , As you can see in this view very well, close the bearing washers 11 with the suction pipe 2 ''' so off that this part of the duct wall of the suction pipe 2 ''' form.

In all embodiments described above, a variant with one-piece intake manifold, d. H. without suction tube cover. The flap mechanism according to the invention is then inserted in the Saugrohrmontage when this is composed of several parts of Saugrohrschalen.

LIST OF REFERENCE NUMBERS

1 '' ', 1' ', 1', 1

Saugrohrklappenanordnung

2 '' ', 2' ', 2

suction tube

3 '' ', 3' ', 3', 3

Saugrohrklappenwelle

4 '', 4

Intake manifold

5 '', 5 ', 5

Saugrohrdeckel

6

Pivot member

7

connecting portion

8th

screw pipe

9

Screw aperture

10

actuating end

11

bearing disk

Claims (7)

Intake manifold flap assembly ( 1 ; 1'; 1''; 1''' ) for an internal combustion engine, having the following features: - several intake manifold flaps ( 4 ; 4 '' ), which are rotatably movable about a common axis of rotation, - in the region of each intake manifold flap ( 4 ; 4 '' ) is a rotary axis section ( 3 ; 6 ), - the rotary axis sections ( 3 ; 6 ) are via connecting sections ( 3 ; 7 ) rigidly connected to each other, - the common axis of rotation runs in an edge region of each intake manifold flap ( 4 ; 4 '' ). characterized in that the connecting sections ( 7 ) as bent portions of a Saugklappenwelle ( 3 '; 3 ''; 3 ''' ), the cranked portions of the suction flap shaft disc-shaped storage areas ( 11 ), and the outer diameter of the disk-shaped bearing areas ( 11 ) is at least twice as large as the height of the cranking of the suction flap shaft ( 3 ''' ) Saugrohrklappeneinrichtung according to claim 1, characterized in that the intake manifold flaps ( 4 '' ) has a thickness greater than 5% of its smallest extent. Suction tube ( 2 ; 2 ''; 2 ''' ) with a suction flap device ( 1 ; 1'; 1''; 1''' ) according to any one of the preceding claims. Suction tube according to claim 3, characterized in that the intake manifold flaps ( 4 ; 4 '' ) between a closure position in which it at least a portion of the suction tube ( 2 ; 2 ''; 2 ''' ), and an open position are pivotable, in which they at least partially from a flow region in the free cross section of the suction tube ( 2 ; 2 ''; 2 ''' ) in each case a niche in the intake manifold ( 2 ; 2 ''; 2 ''' ) are brought. Suction pipe according to claim 3, characterized in that at least part of the disk-shaped bearing areas ( 11 ) as part of the wall of the suction tube ( 2 ''' ) is trained. Internal combustion engine with a suction pipe ( 2 ; 2 ''; 2 ''' ) according to one of claims 3 to 5. Motor vehicle with an internal combustion engine according to claim 6.

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