DE102005061448A1 - Intake manifold and cylinder head assembly - Google Patents

Abstract

The arrangement has an intake manifold device (5) with an intake manifold (6), which is arranged at a cylinder head (1). The cylinder head has positioning units that correspond to positioning recesses (4a) of a flange. The cylinder head has a gas recycle line (3) that makes a connection between a crankshaft area and the intake manifold via the positioning recesses. One of the positioning units is arranged in an inlet area of the intake manifold.

Description

The The present invention relates to an intake manifold cylinder head assembly according to the preamble of Claim 1.

such Arrangements with intake manifold and cylinder head come to the venting of crankcase of internal combustion engines used. About these are combustion gases, which in the combustion chambers the internal combustion engine arise and past the piston rings in the crankcase arrive, forwarded for further use. Call such gases one also "blow-by-gases". These gases can by means of a suction line, for example in the form of a suction tube or a suction pipe to be sucked to this of the internal combustion engine feed again. For this purpose, a suction pipe, which is arranged on the internal combustion engine is fluidic with a gas return line a cylinder head fluidly connected. This is special important that the intake manifold optimally to avoid power failures the internal combustion engine or the internal combustion engine is arranged and so a tight interface between cylinder head and intake manifold is created for sealing transmission of the gas.

A generic crankcase ventilation system is, for example, the DE 10 2004 012 160 A1 refer to.

It is known for the exact positioning of the suction pipe or the Saugrohrvorrichtung on the cylinder head of the internal combustion engine that the cylinder head a flange or inlet flange, in which at least two Holes are formed in the two positioning elements engage the suction tube. Furthermore, the flange for the gas inlet from the crankcase ventilation over the Cylinder head and its gas return line one additional third hole on. This provides a connection channel between the gas return line of the Cylinder head and the intake manifold, that is the third Bore connects as a channel or channel section, the gas return line with the suction pipe.

in this connection are three holes subsequently in the flange of the engine. This leads to a high processing cost. In addition, the third hole formed as a channel is to be designed in such a way that that they are the gas return line and fluidly connecting the suction tube, which requires a high degree of precision.

It Therefore, the object of the present invention is an intake manifold cylinder head assembly to create a simple and space-saving connection of the Suction pipe allows the cylinder head, while simultaneously a precise centering without complicated precision work can be realized is.

These Task is based on an intake manifold cylinder head assembly according to the generic term of claim 1 in conjunction with its characterizing features solved. The subsequent dependent ones claims give advantageous developments of the invention again.

The Invention includes the technical teaching that in an intake manifold cylinder head assembly for a Internal combustion engine of a motor vehicle with at least one Suction tube having suction tube device, which via a a Positionierausnehmungen comprehensive flange to a with the Recesses corresponding positioning elements having Cylinder head is arranged, which comprises a gas return line, which is a Establishing connection between the crankshaft space and the intake manifold, being the connection over one or more of the Positionierausnehmungen runs.

The Intake manifold cylinder head assembly according to the invention includes a cylinder head and a Saugrohrvorrichtung with at least a suction tube, which is preferably designed as Saugrohrverteiler. For connecting the intake manifold to the cylinder head has the cylinder head has a flange on the side. On this flange are Positioning recesses and other recesses for further Attachment and / or fixation of the intake manifold on the cylinder head intended. In addition, lead into the flange, more precisely its just trained and inclined surface the Gas recirculation line (s).

For the exact one Positioning of the suction tube or the Saugrohrvorrichtung on the Cylinder head, at least two Positionierausnehmungen necessary. Characterized in that one of the Positionierausnehmungen as a fluidic connection between gas return line and suction tube is formed, may be a third, separate bore omitted for fluidic connection, which minimizes the Nachbearbeitungsaufwand means without affecting the exact positioning. By the possibility to renounce a third hole increases the area for openings and connections for other purposes.

It is preferred that at least one of the positioning recesses is designed for the fluidic connection in the manner of a blind hole. This is easy to manufacture and, in addition to the possibility of using standard connection or positioning elements such as pins and the like, offers the possibility of exactly maintaining a predetermined depth of the positioning recess. Thus, the posi tionierausnehmung be tuned exactly on running in the cylinder head channels or lines.

Further it is preferred that the gas return line near the bottom region of the blind-hole-shaped positioning recess opens into the positioning recess. The bottom area is the area in which the positioning recess, those from an outside begin to be trained ends.

By the estuary the gas return line in The bottom area can be a major part the positioning recess cooperate with a positioning element and only a small area needed for positioning and / or Attachment of the positioning element or for the interaction of positioning element and Positionierausnehmung is less effective, can for the passage of the fluid or flowing Medium be used. This results from the blind hole-shaped training the positioning recess and the mouth in the bottom portion of the Positioning recess optimal utilization of Positionierausnehmung and a compact design.

It It is preferred that the positioning elements are excellent in a plug-like manner are formed with the corresponding Positionierausnehmungen according to a Plug-socket principle to cooperate. By the plug-like Training gives the fitter a feedback when the positioning element enters the positioning and thus knows whether Saugrohrvorrichtung and cylinder head are positioned correctly.

Further it is preferred that a first positioning element in an inlet region of the suction pipe is arranged. Under inlet area is the mouth area the suction pipe or the inlet duct branching from the intake manifold to understand in the exit area, that is, the area in the intake manifold and cylinder head are connected to each other or even the interface area. In this area, extending into the interior of the intake channel extends, the positioning element is formed so that there is a sufficient stability and support experiences.

By This arrangement is an optimized positioning of the suction pipe to the positioning recess. Because of the arrangement in the inlet area During assembly, this inlet area becomes in the mouth area directed the positioning recess out. Thus, with correct Arranging then the first positioning by the over the positioning passed medium or fluid flows around and the fluid passes through your intake port to the intake manifold.

As Therefore, it is preferred that the inlet area through one leading to the suction pipe Inlet channel is formed. This requires the positioning element can not be formed directly in the suction tube but can also in a kind of "secondary arm" of the intake manifold, this means be arranged a branching inlet channel, here optionally other flow conditions are formed.

Also is preferred that the first positioning a lesser Cross section as a corresponding first positioning recess and / or the inlet region, thus a fluid at the first positioning element flow past into the suction pipe can. Preferably, the positioning element is in a recess of the Inlet area arranged to allow sufficient clearance to flow to ensure the fluid. In this case, the cross section is to be interpreted so that on the one hand the flow not or only minimally affected and on the other hand, the stability of the positioning is not impaired is.

Also it is preferred that the first positioning element be elongated, preferably in the manner of a sword, formed part is formed. Thus, the positioning element has an optimally with the Positionierausnehmung cooperative outstanding part. Through the training as a sword can with a small cross-sectional area a accurate positioning can be realized so that sufficient fluid at the cross section through the cross-sectional opening of the inlet region can flow.

Also it is preferred that the cross section of the second positioning element selected is from the group comprising round, rectangular, square, oval, polygonal, cruciform or profile cross sections. in principle let yourself use any cross section. However, the above listed Cross sections an optimal positioning property in accordance optimized production costs.

Further it is preferred that the second positioning element substantially the same cross section as the corresponding second positioning recess has a positive connection to realize. As a result, an accurately positionable arrangement ensured by intake manifold and cylinder head, which only a single Positioning of cylinder head and intake manifold to each other allows. The second positioning element is not in the inlet area of the Suction tube arranged positioning.

Further measures improving the invention are described below together with the Description of preferred embodiments of the invention with reference to the figures shown in more detail. It shows:

1 a perspective view of a cylinder head with a gas supply suitable positioning,

2 in perspective, a Saugrohrvorrichtung formed as Saugrohrverteiler with multiple suction pipes, wherein in the suction pipe according to the invention positioning elements are arranged, and

3 in perspective a cross section through an intake manifold cylinder head assembly in the connected state.

1 shows a perspective view of a cylinder head according to the invention 1 an intake manifold cylinder head assembly according to the invention. The cylinder head 1 has a flange on the side 2 with a flat surface which is inclined for better connection to other devices. From the upper surface run in the direction of the cylinder head inside the gas return lines 3 (see also 3 ) as well as the Positionierausnehmungen 4 , In other words, the gas return lines open 3 as well as the positioning recesses 4 in the surface of the flange 2 , As mentioned, the flange 2 in the present case four gas return lines 3 on. In addition, the flange points 2 two positioning recesses 4 on, wherein a first positioning recess 4a fluidic with at least one gas return line 3 is connected and the second positioning recess 4b is designed only for receiving a corresponding positioning element. This allows a medium from the gas recirculation line 3 in / through the first positioning recess 4a stream.

The surface of the flange 2 is just designed to provide such a connection for a Saugrohrvorrichtung or more precisely at least one suction tube. A suction tube device is in 2 shown.

2 shows in perspective view a Saugrohrvorrichtung 5 , which present as intake manifold with four intake manifolds 6 with at least one branching inlet channel 6a is formed, which are each designed to conduct media. The mouths or the mouth sections of the suction pipes or the suction pipes 6 including inlet channel 6a are corresponding to the surface of the flange in 1 Plan formed in a plane to the also flat flange of the cylinder head according to 1 to be arranged. The suction tube device 5 has two positioning elements 7 on, a first positioning element 7a and a second positioning element 7b , The second positioning element 7b is like a plug over the mouth of the inlet channel 6a outstanding projection or pin formed, which in the present case has a cross-shaped cross section and for positioning in the second positioning 4b is trained.

The first positioning element 4a is in a recess of a suction tube 6 , more precisely a section of a suction tube 6 - the inlet channel 6a - Formed, and also protrudes beyond the mouth area, so that this positioning element 7a can be plugged into a corresponding positioning recess, here in the first positioning recess according to a plug-socket principle. The first positioning element 7a has a sword-shaped, ie an approximately elongated, cuboid formation with an approximately rectangular cross-section, wherein the cross-section is minimized for optimal passage of a fluid or medium. In addition, the first positioning element 7a a longitudinally extending recess in order to provide the largest possible flow cross-section for a fluid. The positioning elements 7 be during assembly of Saugrohrvorrichtung 5 to the cylinder head in the corresponding Positionierausnehmungen the cylinder head according to 1 plugged. An assembled intake manifold cylinder head assembly is in 3 shown.

3 shows a perspective view of a cross section through an inventive intake manifold cylinder head assembly 8th , Here is the cylinder head 1 with the flange on the intake manifold 5 arranged or attached. The cylinder head 1 has a gas return line 3 via which the blow-by gas (fluid) to the intake manifold 5 , more precisely, a suction tube 6 is directed. The gas return line 3 opens at least partially into a part of a first positioning recess 4a , The first positioning recess 4a is present as a blind hole-like depression with a circular cross-section - as a positioning hole - formed. At least part of the gas return line opens into the bottom region of this positioning bore 5 , Further protrudes into the first positioning recess 4a the first positioning element 7a the intake manifold device 5 ,

In this assembled state, the cross section of the first positioning element fills 7a not the entire cross section of the first positioning recess 4a out. Thus, the blow-by gas in the first positioning recess 4a on the first positioning element 7a over the inlet channel 6a in the suction pipe 6 flow.

The first positioning element 7a is in an inlet area 9 a suction tube 6 , more precisely an inlet channel 6a educated. The inlet area 9 is here as a branching channel, channel section or inlet channel 6a of the suction pipe 6 trained and thus connects the suction pipe 6 and the gas return line 3 so that a connection between gas return line 3 and suction pipe 6 is realized.

The Invention is not limited to the preferred embodiments described above.

It Rather, deviations from this are conceivable, which of the scope the following claims are included.

1

cylinder head

2

flange

3

Gas recirculation line

4

positioning recess

4a

first positioning recess

4b

second positioning recess

5

Saugrohrvorrichtung

6

suction tube

6a

inlet channel

7

positioning

7a

first positioning

7b

second positioning

8th

Intake manifold and cylinder head assembly

9

inlet area (Intake manifold)

Claims (10)

Intake manifold cylinder head assembly ( 8th ) for an internal combustion engine of a motor vehicle with a crankshaft space or the like, comprising at least one intake manifold ( 6 ) having suction tube device ( 5 ), which via a Positionierausnehmungen ( 4 ) comprehensive flange ( 2 ) to a corresponding with the recesses positioning ( 7 ) having cylinder head ( 1 ) is arranged, which a gas return line ( 3 ), which a connection between the crankshaft space and the intake manifold ( 6 ), characterized in that the connection via one or more of the Positionierausnehmungen ( 4 ) runs. Intake manifold cylinder head assembly ( 8th ) according to claim 1, characterized in that at least one of the positioning recesses ( 4 ) is designed for fluidic connection in the manner of a blind hole. Intake manifold cylinder head assembly ( 8th ) according to claim 1 or 2, characterized in that the gas return line ( 3 ) near a bottom region of the blind-hole-like positioning recess ( 4 ) in the positioning recess ( 4 ) opens. Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 3, characterized in that the positioning elements ( 7 ) are excellently designed to be in contact with the corresponding positioning recesses ( 4 ) cooperate according to a plug-socket principle. Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 4, characterized in that a first positioning element ( 7a ) in an inlet area ( 9 ) of the suction tube ( 6 ) is arranged. (ie it flows around) Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 5, characterized in that the inlet area ( 9 ) through an inlet channel leading to the intake manifold ( 6a ) is formed. Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 6, characterized in that the first positioning element ( 7a ) has a smaller cross-section than a corresponding first positioning recess ( 4a ) and / or the inlet area ( 9 ), so that a fluid at the first positioning ( 7a ) into the suction pipe ( 6 ) can flow. Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 7, characterized in that the first positioning element ( 7a ) is formed as an elongated, preferably designed like a sword part. Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 8, characterized in that the cross section of the second positioning element ( 7b ) is selected from the group consisting of round, rectangular, square, oval, polygonal, cross-shaped, or profile cross-sections. Intake manifold cylinder head assembly ( 8th ) according to one of the preceding claims 1 to 8, characterized in that the second positioning element ( 7b ) substantially the same cross section as the corresponding second positioning recess ( 4b ) in order to realize a positive connection.