EP1288485B1 - Intake pipe with mounting flange and insert to reinforce the flange - Google Patents

Abstract

The suction pipe for an internal combustion engine has a cylinder head fixture flange accommodating fixture devices with at least one through passage (15), in which an insert (14a) of more rigid material than that of the flange is fitted. The through passage and the insert are open to the edge of the flange, allowing one of the fixture devices to be introduced into the through passage from the side. The cross-section of the insert is U-shaped the open side of the U being directed towards the flange. The flange is a cylinder head flange (13), in which are integrated several suction channels (12) for the combustion air. Several inserts (14a,14b) are arranged along the one longitudinal side (17) of the cylinder head flange.

Description

State of the art

The invention relates to a suction pipe for an internal combustion engine with a through a Insert reinforced flange for fastening according to the preamble of claim 1 or an insert for reinforcing flange components according to claim 4 or a Assembly method for suction pipes according to the preamble of claim 7.

Suction pipes with reinforcing components in the flange area are known. For example, is according to DE 196 13 279 A1 discloses a suction tube whose suction channels 10, 11, 12, 13 (see Figure 1 of this document) open into a cylinder head flange. This cylinder head flange has passages 14, 15, 18, 19, which for fastening the Zylinderkopfflansches are provided by means of fastening screws. Since the suction tube out Plastic, these passages are according to Figure 2 of the document with reinforcing sleeves 22 provided which receive the pressure of the mounting screws and limit the deformation of the Zylinderkopfflansches in this way.

The increasingly limited space in the engine compartment, however, require modern intake manifolds high flexibility with regard to the assembly process of the suction tube on Engine block. The construction described above enables the fulfillment of this Mounting requirements only limited. The intake manifold must be with the cylinder head flange be brought to the installation site, then using the mounting screws to be fixed. Here, the so-called screwdriver release is to be observed. This means that the mounting tool for the mounting screws sufficient Space must be found in which it can be placed. It is still too Make sure that the screws are still in place after positioning the cylinder head flange the passages must be inserted, whereby a longer axial movement of the Mounting screws is necessary.

The object of the invention is therefore to provide a suction tube with a reinforced mounting flange or inserts to reinforce the flange to create a Assembly favored even in tight spaces. This task is done by the Characteristics of claims 1 and 4 solved. Furthermore, according to claim 7, a method placed under protection for mounting the suction tube.

Advantages of the invention

The intake manifold according to the invention consists in a known manner from the intake air conductive structures. According to the typical structure has a suction tube one Inlet that opens into a plenum from which the suction channels towards the cylinder head flange depart. By means of the cylinder head flange, the images for fasteners has, the suction pipe is attached to the cylinder head of the engine block.

The suction tube can, for. B. made of plastic or even light metal. These Materials contribute to the weight reduction of the vehicle. However, you have to reinforced such materials in the field of recordings for the fastener to allow reliable installation. Therefore, the images are using Strengthens inserts that surround the passages, for example. Such reinforcing agents consist of bushings, which are made of steel or brass can, depending on the required stiffness of the reinforcing medium.

The invention is characterized in that both the passage passing through the Flange for attachment, in particular the Zylinderkopfflansch is formed, as well as Insert itself, which is introduced into the passage of the flange, to the edge of Flange are made open towards. By this is meant that the passage is not off a closed sleeve, which has an upper and a lower opening for Passing through the fastening means, in particular a fastening screw has, but that the upper and lower openings are as it were through a kind of slit in the Side wall of the sleeve are connected. This slot leads to the edge of the flange towards open design, so that the fastener from the side in the Passage can be introduced. Therefore, an axial movement of the fastener not necessary through the openings of the passage. Rather, it can Insert the fastener directly from the side through the slot in the insert become. Of course, for example, movements are skewed from above possible, so that there is an intermediate of the joining movement between the plugging from above or the insertion of the page is generated. That way you can do that Suction tube with the inserts according to the invention optimally with respect to the joining direction adapt to the space available in the engine compartment.

The use according to the invention for reinforcing the flange component can be understood also use it elsewhere. The condition is that the implementation of the Insert, which is available for receiving the fastener that already having described lateral slot-like opening. The mission must therefore to the edge be made open and mounted in the installation so that the opening continues towards the edge in the Flanschbauteil. As a result, after installation of the insert the Fasteners are introduced from the side of the flange ago.

This results in a mounting method, which for the intake manifold according to the invention suitable is. The fasteners can be preassembled at the installation site. In case of Fixing screws for a cylinder head flange so this can be in the cylinder head be screwed. Subsequently, the suction pipe by means of the open inserts be placed sideways on the pre-assembled screws. These must be followed only be tightened, causing the fastening tools only Perform a small joining movement of the screws or fasteners have to. In particular, the long axial joining paths of the fastening means are eliminated, which do not have to be plugged through the holes, which through the inserts according to formed in the prior art.

According to a further embodiment of the invention, the insert is seen in cross-section designed essentially U-shaped. The open side of the u's is then to the edge of the Flange aligned, whereby the introduction from the side is possible.

A further embodiment of the invention provides that several of the invention Inserts are used, which along the longitudinal side of the Zylinderkopfflansches are arranged. As a result, in particular, the already described assembly method especially relieved, since the mounting screws are pre-assembled in a row can and the suction tube easily with the cylinder head flange can be plugged on this series of fasteners before this final be tightened.

The inserts can according to a further advantageous variant means for generating have a positive connection with the flange. This is a design of the Inset, which prevents the assembled insert sideways out of the to Edge slipping out open flange. This is advantageously in particular by to accomplish a circumferential bead, which for positive connection leads. With regard to the opening direction of the receptacle for use in the flange component So must the means for generating a positive connection form a kind of undercut, which serves as a safeguard against slipping out.

Of course, the measure described by other typical measures be supported for the assembly of components. For example, the sleeves glued or used warm. In the case of hot insertion, the material the flange component plastically deformed, whereby a positive connection can be generated can. Furthermore, by an excess of the insert also creates a traction which secures the insert against slipping out of the receptacle.

These and other features of preferred embodiments of the invention are excluded from the claims also from the description and the drawing, wherein the individual features in each case alone or in the form of sub-combinations realized in the embodiment of the invention and in other fields can be and represent advantageous and protectable versions for which protection is claimed here.

drawing

Figur 1

den Blick auf das erfindungsgemäße Saugrohr im rechten Winkel zur Grundfläche des Zylinderkopfflansches,

Figur 2

den erfindungsgemäßen Einsatz an einem zugehörigen Flanschbauteil in perspektivischer Ansicht,

Figur 3

die Montage des erfindungsgemäßen Saugrohres am Zylinderkopf einer Brennkraftmaschine schematisch und

Figur 4a - c

verschiedene Varianten von Einsätzen.

Further details of the invention are described in the drawing with reference to schematic embodiments. Show here

FIG. 1

the view of the intake manifold according to the invention at right angles to the base surface of the cylinder head flange,

FIG. 2

the insert according to the invention on an associated flange component in a perspective view,

FIG. 3

the assembly of the suction pipe according to the invention on the cylinder head of an internal combustion engine schematically and

Figure 4a - c

different variants of inserts.

Description of the embodiments

The suction pipe according to FIG. 1 has, in a known manner, an inlet 10 for the combustion air on, which opens into a collecting space 11. From this go suction channels 12th from, which open into a cylinder head flange 13. In these are various inserts 14a, b introduced, which are made of steel and so the cylinder head flange 13 from Reinforce plastic.

The inserts 14b are designed according to the prior art. Of special Interest is therefore the inserts 14a, which are constructed as follows. The stakes 14 a are mounted in passages 15, which through the cylinder head flange thirteenth are formed. The inserts themselves have bushings 16, which on one longitudinal side 17 of the cylinder head flange 13 are mounted, d. H. that these executions are open to the edge of Zylinderkopfflansches. In this way, a schematic from below shown hexagon screw 18 from the side in the passage 15th be inserted. This assembly process is made possible by a U-shaped Formation of the associated insert 14a. You could also get a horseshoe-shaped one Speak training.

In Figure 2, a flange 13 is shown, which z. B. a section of the Long side 17 of the suction tube according to Figure 1 could be. The insert 14a is in perspective shown shortly before its assembly in the indicated direction of the arrow 19. It will be the U-shaped cross-section clearly and the attachment of an annular bead 20, the surrounds the curved part of the U-profile ring. This corresponds to installation the insert with a shoulder 21, which is formed in the passage 15. After installation of the insert 14 a is therefore against slipping out in the direction of Long side 17 secured by the form-fitting forming undercut 22.

The suction pipe according to Figure 3 is shown in section. To recognize is one of the suction channels 12, the collecting space 11 and the cylinder head flange 13 in section. The insert 14a is also cut so that the passage 16 can be seen.

According to the indicated arrow 23, the suction pipe on a cylinder head 24th an internal combustion engine 25, not shown in the dash-dotted lines Position be brought. The bushing 16 comes with a fastening screw 26 in contact and is provisionally fixed. The final fixation will be caused by tightening the mounting screw 26. The illustrated joining direction 23 is thus by the longitudinal side 17 toward open passage 16 of the insert 14 a allows.

FIG. 4 a once again shows the insert 14 a according to FIG. 2 as a plan view. additionally is a dropout 27 of the insert with rounded edges 28 executed, what an insertion of the fastener, not shown in the implementation 16 facilitated. To recognize is still in this view particularly well the undercut 22nd

FIG. 4b shows a further version of the insert 14a. This has little noses 29, soft on the outside of the insert are molded. Therefore, the use is suitable particularly good to be cast in a flange plastic component, wherein the final fixation is achieved by the lugs 29.

The insert 14a according to FIG. 4c is shown in a side view. He has a den Shell of the insert circumferential corrugation 30 on, which is why the use in particular is suitable to be used as a hot insert.

Claims (6)

1. Intake pipe of an internal combustion engine having a flange for securing purposes, more especially a cylinder head flange, which is provided with at least one passage (15) for accommodating securing means (26), an insert (14a) being introduced into the passage, said insert being made of a material which is more rigid than the material of the flange, characterised in that the passage (15) and the insert (14a) are open towards the edge of the flange, in such a manner that one of the securing means (26) can be introduced into the passage from the side.
2. Intake pipe according to claim 1, characterised in that the cross-section of the insert is substantially U-shaped, the open side of the U being orientated towards the edge of the flange.
3. Intake pipe according to one of the previous claims, the flange being a cylinder head flange, in which a plurality of intake ducts (12) for the air of combustion are incorporated, characterised in that a plurality of inserts (14a, b) are disposed along the one longitudinal side (17) of the cylinder head flange.
4. Intake pipe according to one of the previous claims, characterised in that the insert (14a) includes means for creating a locking form with the flange component.
5. Intake pipe according to claim 4, characterised in that the means for creating a locking form consist of a circumferential bead (20), which is open towards one side corresponding to the insert (14a).
6. Method for mounting an intake pipe according to one of claims 1 to 5, characterised in that the said intake pipe is pushed with the at least one open insert (14a) laterally onto a securing means (26), which is pre-mounted at the installation location, more especially a screw, and is subsequently secured by means of the securing means.

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