DE10303985A1 - Arrangement for controlling fluid flow in channel, e.g. engine inlet channel, has control element in annular groove in body and/or in channel wall, or in element forming channel wall, in open position - Google Patents

Abstract

The arrangement has a control element (8) adjustable between channel (2) opening and closing positions and a flow element (3) in the channel forming an annular channel that is closed by the control element in the closed position. The control element is arranged in an annular groove in the body and/or in an annular groove (7) in the wall (4) of the channel, or an element forming the wall in this region, in the open position.

Description

The invention relates to a device for controlling the fluid flow in a channel having at least one wall after in the preamble of claim 1 closer defined type.

Generic devices are from the DE 37 39 494 A1 , of the DE 197 29 553 A1 , of the DE 199 50 330 A , of the DE 101 21 616 A1 , of the DE 19 05 026 A1 and the DE 93 20 686 U1 known.

In this case, a sleeve forms the inner part of a canal. This is to shut off the same in the axial Direction against a valve seat verschobett. Because the sleeve itself forming the channel wall and be thin-walled to avoid fluid reaction forces must, is a streamlined design of the Inlet in the actual valve switching areas only very limited possible.

A device used in the intake passage of an internal combustion engine is known from DE 199 08 435 A1 known. In this case, two solenoid-controlled flaps are provided, which are able to open or close the channel. The disadvantage here, however, is the fact that the flaps must be moved to reach the closed position against the force caused by the fluid flow force, which disadvantageously requires very high magnetic forces.

Another such device describes the DE 100 32 669 A1. However, the control provided in this case generates a relatively high flow resistance in the channel, which leads even in the open position to an unwanted and unacceptable in various applications throttling the fluid flow.

In the MTZ 12/2001, pages 998 bis 1009 is described a so-called air cycle valve with which the Control of the flow be performed in a suction line of the internal combustion engine can. The air cycle valve has a two-leaf flap, which in relatively short Time between the open and the closed position can be adjusted. Due to its construction with at least one shaft passage is this valve, however, in principle not completely tight.

From the general state of the art are as well a variety of devices for controlling the flow of fluid in a channel. known. For example, it can be flat or rotary valves act in their closed position the Block the cross section of the canal. In this closed position the controls are exposed to the full fluid pressure. The resulting force on the control works either predominantly in the direction of movement of the control and influences therefore the drive directly, or it acts transversely to the direction of movement and causes so increased Frictional forces.

It is therefore the task of the present Invention, a device for controlling the fluid flow in to create a channel, which on the one hand very fast between the open position and the closed position are switched can and produces a high tightness in the closed position and which on the other hand in the open position only a low flow resistance represents. In addition the drive of the control should be influenced as little as possible by the fluid forces become.

According to the invention this object is achieved by the solved in claim 1 features.

Having an annular portion, in the axial direction of the channel adjustable control is supported in the closed position on a wall of the channel or on a the wall of the channel forming element, so that it is substantially free of gas forces is. This can give a very rigid and massive interpretation of the Control are omitted, resulting in a relatively light and therefore also with low forces fast to switching control results. The easy opening and Conclude The control is further characterized by the extremely low load same with fluid forces given, so when opening and closing no big, the movement of counteracting forces occur. The tight shut off of the channel is determined by the concern of the control the wall of the channel or of the wall of the channel forming element.

By the inventive housing of the Control in the annular Groove represents the control in its open position no disturbance to the fluid flow, such that the wall or the flow body is streamlined, i. with corresponding, to the opposite one Part adapted radii can be provided.

According to the invention is in a uniform Cross-sectional enlargement of a flow channel a streamlined designed Deflector body. The inner channel wall and the flow body are designed such that an annular channel with approximately constant Flow area results. As a result, the best conditions for low flow losses given the valve in its open position.

Is the outer diameter of the Umströmungskörpers clear greater than the channel diameter of the undisturbed Flow channel, so the forming annular channel can in principle in two places an axially moved, preferably designed as a sleeve slide control be closed.

In the open position, the control can be accommodated in a slot in the outer channel wall or in a slot in the flow body. In none of the positions of the control does a substantial fluid force act on the control. In the closed position and a pressure difference across the control this acts only on the axial projection of the control, so on the annular surface. This can be kept very small by choosing a small wall thickness. On the other hand, the small slit width disturbs the flow in the open position only very little, especially since the contour of the control element can be adapted to its side facing the flow of the wall of the channel or the Umströmungskörpers.

So in the present invention takes over the flow body the Function of recording the gas forces and the control serves only to open and close the perfused Annular channel.

In an advantageous embodiment invention, the control by means of a rocking armature drive, which at least one opening magnet, at least one closing magnet, at least one in the opening direction acting spring element and at least one acting in the closing direction Has spring element, be adjustable in the axial direction. By leaves such a drive realize a particularly fast adjustment of the control.

In this context, a be given particularly space-saving design when the oscillating armature drive arranged within the Umströmungskörpers is.

A use of the device according to the invention for controlling the flow in an intake passage of an internal combustion engine is in claim 18 specified.

Further advantageous embodiments and further developments of the invention will become apparent from the remaining dependent claims and the embodiments shown in principle below with reference to the drawing.

Showing:

1 a first embodiment of the device according to the invention with the control in the open position;

2 the device off 1 with the control in the closed position;

3 a second embodiment of the device according to the invention with the control in the open position;

4 the device off 3 with the control in the closed position;

5 a third embodiment of the device according to the invention with the control in the open position;

6 the device off 5 with the control in the closed position;

7 an enlarged view of the control 5 ;

8th an enlarged view of the control 6 ;

9 A fourth embodiment of the device according to the invention with the control in the open position;

10 the device off 9 with the control in the closed position;

11 a fifth embodiment of the device according to the invention with the control in the open position;

12 the device off 11 with the control in the closed position;

13 a section along the line XII-XII 12 ;

14 a sixth embodiment of the device according to the invention with the control in the open position;

15 the device off 14 with the control in the closed position;

16 a seventh embodiment of the device according to the invention with the control in the open position; and

17 the device off 16 with the control in the closed position.

In 1 is a device 1 for controlling the fluid flow indicated by an arrow A in a channel 2 shown. At the channel 2 it may be, for example, an intake passage of an internal combustion engine, not shown.

The device 1 has one in the channel 2 arranged valve body or Umströmungskörper 3 on top, with the inside of a wraparound wall 4 of the canal 2 a ring channel 5 forms. In the case of the symmetrical design of the bypass body shown here 3 If the orientation of the flow is arbitrary, the pressure loss is the same. That in the channel 2 Fluid located, for example, to an internal combustion engine flowing intake air, thus flows around the Umströmungskörper 3 through the ring channel 5 without a significant disturbance of the fluid flow occurs.

The cross section of the canal 2 and part of the channel 2 forming annular channel 5 is substantially constant over its entire length, so that there is no restriction on the flow dynamics.

The flow body 3 is with the wall 4 of the canal 2 over several, attached at any points connecting webs 6 connected, which represent by their profile-like design also only a small disturbance of the fluid flow. To reduce the flow resistance within the channel 2 also carries the streamlined shape of the Umströmungskörpers 3 which causes a gentle diversion of the fluid flow.

In an annular groove 7 the wall 4 of the canal 2 there is a control 8th , wel between one channel 2 releasing, in 1 shown open position and a channel 2 shut off, in 2 illustrated closed position is adjustable. The control 8th has an annular portion 9 on or is completely annular in this embodiment. Through this annular section 9 will be in the closed position of the control 8th the ring channel 5 closed and thus the channel 2 blocked. In its closed position lies the control 8th on a circumferential return 10 of the flow body 3 on.

The in the closed position of the control 8th Fluid forces generated by the fluid flow become due to the very small cross-sectional area of the annular portion 9 of the control 8th essentially not absorbed by the same, but by the Umströmungskörper 3 who forces these over the connecting bridges 6 to the wall 4 of the canal 2 derives. This is due to the annular design of the control 8th , whereby on its wall from the outside no resulting gas forces act, but only on the same cross section. Therefore, the control can 8th be carried out very easily, whereby only relatively small adjustment forces are required for relatively large accelerations. The adjustment or the drive of the control 8th will be explained in more detail later.

As if from a comparison of 1 With 2 shows, the control becomes 8th in the axial direction of the channel 2 moved to get from the open to the closed position.

An alternative embodiment of the device 1 show the 3 and 4 , Here, the Umströmungskörper 3 an annular groove 11 on where the control is 8th or the annular portion 9 the same is arranged in its open position. The movement of the control 8th between the in 3 illustrated open position of the channel 2 and the in 4 illustrated closed position of the channel 2 So, in reverse to that in the 1 and 2 represented direction, but in turn in the axial direction of the channel 2 and thus parallel to the direction of the fluid flow A. As in 4 is recognizable, lies the control 8th in the closed position on a return 10 ' the wall 4 of the canal 2 and thus ensures a seal.

In the 5 and 6 is another embodiment of the device 1 shown. Here is both the annular groove 11 in the flow body 3 as well as the annular groove 7 in the wall 4 of the canal 2 intended. The control 8th has two annular sections 9a and 9b on, of which the one section 9a inside the groove 11 and the other section 9b inside the groove 7 is arranged. To get from the open to the closed position, it is necessary in this embodiment, the two annular sections 9a and 9b of the control 8th towards each other until they touch each other. This movement takes place in the axial direction of the channel z. In this embodiment, the masses to be accelerated and the paths to be traveled are the annular sections 9a and 9b considerably less than in the other embodiments, which may optionally simplify a later explained drive.

The 7 and 8th show a more detailed representation of the two annular sections 9a and 9b of the control 8th , These are on the sides facing each with chamfers 12 provided that conform to the contour of the wall 4 and the flow body 3 adapt and thus contribute to a lower flow resistance. Furthermore, results from the in the closed position of the control 8th mutually contacting bevels 12 a better sealing of the canal 2 , A bevel of the control 8th can also with the versions 1 and 2 the device 1 be made. Then get the return 10 respectively. 10 ' in the flow body 3 or the channel wall 4 the same bevel, which also contributes to improving the flow and the seal.

In the 9 and 10 is a modification of the embodiment according to the 5 . 6 . 7 and 8th shown. Again, both the annular groove 11 in the flow body 3 as well as the annular groove 7 in the wall 4 of the canal 2 intended. However, these do not have the same diameter, so that in the in 10 shown Ge closed position of the control 8th a concentric arrangement of the two annular sections 9a and 9b results. This will cause any issues with setting up the control 8th avoided and it may possibly be a better seal the channel 2 in the closed position.

The 11 . 12 and 13 show a further embodiment of the device 1 , in particular for integration into a cylinder head only partially shown 13 the internal combustion engine is suitable. The principal function of the control 8th , So the opening or closing of the annular channel 5 by the axial movement thereof, however, is substantially identical to the above-mentioned embodiments.

This axial adjustment of the control 8th takes place here by a vibrating armature drive 14 , the opening magnet 15 , a closing magnet 16 , an acting in the opening direction spring element 17 and a spring element acting in the closing direction 18 having. All elements of the oscillating armature drive 14 are within the Umströmungskörpers 3 arranged so that no additional space is required for this. If necessary, it would also be possible to use the oscillating armature drive 14 in the wall 4 of the canal 2 or au outside the canal 2 to arrange and the control 8th in the wall of the canal 2 to place.

To the control 8th from the in 11 Open position shown in the in 12 shown to bring closed position, the energized in the open position opening magnet 15 de-energized, whereby the force acting in the closing direction spring element 18 the control 8th accelerated in the direction of the closed position. So that the spring elements 17 and 18 with the control 8th can engage, has the same next to the annular portion 9 a lid 19 on, between the two spring elements 17 and 18 is arranged. Is this made of a mag genetic material or magnetic material having lid 19 near the closing magnet 16 , so this is energized, causing the lid 19 from the closing magnet 16 is held. The lid 19 thus acts as an anchor. Will neither the opening magnet 15 still the closing magnet 16 energized, so the control leveled off 8th in a middle position, not shown. To a control 8th to obtain very low mass, the same can be made entirely of plastic, with only certain areas of the lid 19 are provided with magnetic material. The closed position of the control 8th embodying state in which the lid 19 of the control 8th from the closing magnet 16 is held or rests on the same and at the same time the annular portion 9 of the control 8th in the circumferential recess 10 in the wall 4 enters, is in 12 shown.

To achieve a simple assembly is the Umströmungskörper 3 in two parts with an upper Umströmungskörperelement 20 and a lower bypass body member 21 educated. The lid 19 is in a recess 22 between the upper Umströmungskörperelement 20 and the lower bypass body member 21 arranged and with several ventilation holes 23 provided that the outflow of air from the recess 22 allow.

The two Umströmungskörperelemente 20 and 21 are by means of several, in the present case designed as screws fasteners 24 connected and via spacers 25 spaced apart. Both the fasteners 24 as well as the spacer elements 25 thereby run through the ventilation holes 23 in the lid 19 ,

The lower bypass body element 21 has an inner main body element 26 and an outer wall portion 27 on. On the inner main body 26 are the closing magnet 16 attached and acting in the opening direction Federele element 17 stored. The above-described connecting webs 6 run in this embodiment between the inner main body element 26 and the outer wall portion 27 that is part of the wall 4 of the canal 2 forms and accordingly with the return 10 is provided, on which the annular portion 9 of the control 8th in the closed position is present.

The ring channel 5 runs in this embodiment, thus between the Umströmungskörper 3 and the outer wall portion 27 the lower Umströmungskörperelements 1 , By the concern of the control 8th in the closed position on the wall section 27 that with the main body element 26 in which the control 8th is stored, directly connected, a more accurate production is possible and it can be kept very low tolerances. This causes the control 8th when taking the closed position ideally on the closing magnet at the same time 16 and on the floor of the return 10 touches down. Through the connecting webs 6 can be an electrical supply, not shown for the oscillating armature drive 14 run.

The upper part of the wall 4 of the canal 2 is of a cross-section widened part of a not fully shown intake manifold 28 educated. The device 1 is fixed in the position shown by the suction tube 28 by means not shown screws or similar fasteners to the cylinder head 13 is screwed. Here are the diameters of the suction tube 28 and the outer wall portion 27 tuned so that one in the intake manifold 28 located sealing element 29 at the same time the device 1 strained and the entire channel 2 seals against the environment.

The outer wall section 27 runs in this embodiment to the point of the largest diameter of the Umströmungskörpers 3 , A receiving hole 30 for receiving the Umströmungskörpers 3 in the cylinder head 13 only has to be mechanically processed in a very small area.

In this way, the cylinder head needs 13 only very slightly revised to the device 1 to be able to record, with a very simple installation of the same is given. By the arrangement described here is the device 1 very close to an intake valve, not shown, of the internal combustion engine, which brings thermodynamic advantages. Also the control 8th is in the immediate vicinity of the cylinder head 13 and thus also arranged in the immediate vicinity of the inlet valve, so that the space between the control element 8th and the intake valve is relatively small, which also brings advantages in the combustion within unillustrated combustion chambers of the internal combustion engine. Alternatively, the control could 8th of course also on the cylinder head 13 opposite side of the Umströmungskörpers 3 be arranged, which optionally a flow would allow more favorable form of the same.

By doing that the control 8th of the forces caused by the fluid flow, as explained above, is hardly affected, no unbalanced load of the oscillating armature drive occurs 14 on.

In the section according to 13 is the number of vent holes 23 , the connecting elements 24 and the spacer elements 25 recognizable.

The 14 and 15 show a further embodiment of the device 1 , The control 8th is again in the Umströmungskörper 3 provided, which also here the upper Umströmungskörperelement 20 and the lower bypass body member 21 having. To drive the control 8th in turn serves the oscillating armature drive 14 , the opening magnet 15 and the closing magnet 16 having. As before, here too the spring element acting in the opening direction 17 and the spring element acting in the closing direction 18 intended.

Instead of the four fasteners 24 as in the embodiment according to the 11 . 12 and 13 is the upper bypass body element 20 however with a central connecting element 24 connected, that over a thread 31 in the lower Umströmungskörperelement 21 is screwed in and by means of two nuts 32 and 33 with the upper Umströmungskörperelement 20 is tense. The connecting element 24 also serves as a guide for the control 8th which one on the lid 19 attached sliding ring 34 which is on the connecting element 24 is slidably mounted.

Instead of the four spacer elements 25 In this embodiment, only three spacer elements 25 but only one of them can be seen on average. Also the vent holes 23 are provided in this embodiment.

The two nuts 32 and 33 act over a disc 35 , several cylindrical pins 36 and another disc 37 on the spring element acting in the closing direction 18 , so by means of nuts 32 and 33 the central position of the control 8th over the two spring elements 17 and 18 can be adjusted. The nuts 32 and 33 and the previously described construction for adjusting the center position of the control 8th are by a existing example of plastic or aluminum alloy cap 38 covered, so that the flow body 3 maintains its streamlined shape.

At an inner diameter of the lower Umströmungskörperelementes 21 is a circumferential sealing element 39 provided, which in the closed position of the control 8th , as in 15 shown, the inflow of the into the channel 2 flowing fluid into the recess 22 prevented. This will increase the tightness of the device 1 elevated.

The device 1 according to the 14 and 15 further includes a decoupling device 40 on which between a connecting flange 41 who is the channel 2 with the cylinder head, not shown here 13 connects, and an intermediate flange 42 , the part of the wall 4 of the canal 2 is, is arranged. The decoupling device 40 has a damping sleeve 43 , which is preferably made of an elastomer, and a running example of metal retaining ring 44 in, in the one formed for example by a bent wire metal clip 45 intervenes. By means of the metal clip 45 become the retaining ring 44 and the cushioning cuff 43 at the lower Umströmungskörperelement 21 fixed.

Furthermore, in 14 and 15 one through the connecting webs 6 running electrical supply 46 for the oscillating armature drive 14 recognizable. In the case of a different kind of electrical, pneumatic or hydraulic drive could of course other supply lines through the connecting webs 6 run.

Through the device 1 according to the 14 and 15 This results in a very compact and powerful way to open and close the channel 2 ,

Another way to drive the control 8th shows the device 1 according to the 16 and 17 , This will be the control 8th from a voice coil drive 47 in the longitudinal direction of the channel 2 emotional. This is the scope of the control 8th a voice coil 48 attached, which with a ring-shaped magnet 49 cooperates. The magnet 49 has a magnetic core 50 up, from an upper yoke 51 and a lower yoke 52 is held. In this case, the magnet 49 be executed both as a permanent magnet as well as Ele romagnet.

The control 8th is from a suspension 53 held and moves, depending on exposure to the magnet 49 in the in 16 illustrated open position or in the in 17 illustrated closed position. In this embodiment of the device 1 is it possible to use the control 8th to hold in intermediate positions, so that, where appropriate, a certain limitation of the flow in the channel 2 can be achieved.

Claims (18)

Device for controlling the fluid flow in a channel, which has at least one wall, with an open between the channel releasing open position and the channel shut-off adjustable control, wherein in the channel a Umströmungskörper is arranged, with the inside of the wall of the channel or a forming in this area, the inside of the wall of the channel forming element an annular channel, which in the closed position by the one annular portion facing, adjustable in the axial direction of the channel control is closed, characterized in that the control ( 8th ) in the open position in an annular groove ( 11 ) within the bypass body ( 3 ) and / or in an annular groove ( 7 ) within the wall ( 4 ) of the channel ( 2 ) or in this area the inside of the wall ( 4 ) of the channel ( 2 ) forming element ( 27 ) is arranged. Device according to claim 1, characterized in that the bypass body ( 3 ) has a streamlined shape. Apparatus according to claim 1 or 2, characterized in that the annular channel ( 5 ) has a substantially constant cross-section. Device according to claim 1, 2 or 3, characterized in that the control element ( 8th ) two annular sections ( 9a . 9b ), one of which ( 9a ) in the open position in the annular groove ( 11 ) within the bypass body ( 3 ), and of which the other ( 9b ) in the annular groove ( 7 ) within the wall ( 4 ) of the channel or in this area the inside of the wall ( 4 ) of the channel ( 2 ) forming element ( 27 ) is arranged. Device according to one of claims 1 to 4, characterized in that the control element ( 8th ) by means of a rocking armature drive ( 14 ), which at least one opening magnet ( 15 ), at least one closing magnet ( 16 ), at least one spring element acting in the opening direction ( 17 ) and at least one spring element acting in the closing direction ( 18 ), is adjustable in the axial direction. Apparatus according to claim 5, characterized in that the oscillating armature drive ( 14 ) within the bypass body ( 3 ) is arranged. Device according to claim 5 or 6, characterized in that the control element ( 8th ) one at the annular portion ( 9 ) attached lid ( 19 ), which with at least one vent hole ( 23 ) and between the spring elements ( 17 . 18 ) is arranged. Device according to one of claims 1 to 8, characterized in that the flow body ( 3 ) in two parts with an upper ( 20 ) and a lower Umströmungskörperelement ( 21 ) is trained. Device according to claim 7 and 8, characterized in that the lid ( 19 ) of the control ( 8th ) in a recess ( 22 ) between the upper ( 20 ) and the lower flow body element ( 21 ) is arranged. Device according to claim 7, 8 or 9, characterized in that the lid ( 19 ) at least one vent hole ( 23 ) having. Device according to claim 8, 9 or 10, characterized in that the lower flow-around body element ( 21 ) an inner main body element ( 26 ) and an outer wall section ( 27 ), which forms part of the wall ( 4 ) of the channel ( 2 ) and with the inner main body element ( 26 ) via at least one connecting web ( 6 ) connected is. Device according to one of claims 8 to 11, characterized in that the upper ( 20 ) and the lower Umströmungskörperelement ( 21 ) by means of at least one connecting element ( 24 ) and at least one spacer element ( 25 ) are spaced from each other. Device according to one of claims 1 to 4, characterized in that the control element ( 8th ) by means of a voice coil drive ( 47 ) is adjustable in the axial direction. Device according to one of claims 1 to 4, characterized in that the control element ( 8th ) is pneumatically, hydraulically or mechanically adjustable in the axial direction. Device according to one of claims 1 to 14, characterized in that the flow body ( 3 ) by means of at least one connecting web ( 6 ) with the wall ( 4 ) of the channel ( 2 ) connected is. Device according to one of claims 1 to 15, characterized that the control is made of plastic. Device according to one of claims 11 to 16, characterized in that by the connecting webs ( 6 ) runs an electrical, pneumatic or hydraulic supply. Use of a device according to one of claims 1 to 17 for controlling the flow in an intake port of an internal combustion engine.