DE102005041910A1 - Throttle body-intake manifold unit for e.g. passenger car, has throttle body unit partially inserted into manifold and sprayed with plastic e.g. polyamide, such that complete positive-fit connection is formed between body unit and manifold - Google Patents

Abstract

The unit (1) has a throttle body unit (10) and an intake manifold (20), where the body unit is partially inserted into the manifold and is sprayed with plastic e.g. polyamide, in such a manner that a complete positive-fit connection is formed between the body unit and the manifold. The body unit is enclosed with a mould core in such a manner that the spraying material is not penetrated into a flow guiding part and/or into a bearing point of the body unit. Independent claims are also included for the following: (1) a method for manufacturing a throttle body-intake manifold unit (2) a motor vehicle comprising a throttle body-intake manifold unit.

Description

The The present invention relates to a throttle intake manifold for a Motor vehicle.

Suction Tubes of motor vehicles are common provided with one or more throttle valve units, which e.g. between the clean air pipe and the suction pipe.

A such throttle unit is e.g. described in WO 2005/002823 and is made of plastic. To connect to the suction pipe is used a flange or a screw connection.

Such However, connections have the disadvantage that stresses are caused by the screw connection can result in the material. The fact that the flange or the screw a certain Length needed, result certain minimum requirements for the size of the throttle body, which is disadvantageous in certain applications.

It Object of the present invention, a throttle valve intake manifold unit to create, which avoids the disadvantages mentioned above, or at least diminished and a reliable Connection between the throttle body and the intake manifold allows.

The Task is performed by a throttle-intake manifold unit with the Features of claim 1 and a method with the features of Claim 6 solved. In the dependent claims 2 to 5 and 7 to 9 are preferred developments of the throttle valve intake manifold unit according to the invention and the method described.

One throttle valve intake manifold according to the invention, containing a throttle body and a suction pipe is thereby characterized in that the throttle valve unit at least partially inserted in the suction tube and so encapsulated in plastic, that thereby a substantially and / or completely positive connection arises between the throttle valve unit and the intake manifold.

A Such throttle intake manifold unit offers the advantage that the previously provided fasteners, such as e.g. screws Stud bolts, nuts, no longer needed, creating a more compact Structure of the throttle-intake manifold unit is possible.

Farther results in an increased Strength due to the positive locking Connection, which results from the encapsulation.

It has stood out in the throttle valve manifold units from the state of Technique so far represented as problematic that an injection a throttle valve directly into the intake manifold due to the size of the intake manifold and the shaping manufacturing technology and tolerances very much difficult to control, if not impossible.

These However, problems are caused by a throttle valve intake manifold unit according to the invention avoided by injecting a prefabricated throttle valve unit here becomes.

By the form-fitting Connection, which results from the encapsulation, is also a compact Design of the throttle intake manifold unit possible.

Prefers the throttle body is fully inserted into the intake manifold. This allows the compactness of the throttle intake manifold unit increased again become; this is also the description of a corresponding preferred embodiment of the invention (see below).

Prefers is The relationship the lengths L1 and L2 ≥ 0, 6: 1 and ≤ 10: 1, where L1 is defined as the axial length of the portion of the throttle draft tube unit, which provided on the clean air tube side for connection to the clean air tube and L2 is defined as the axial length of the remainder of the throttle intake manifold assembly until the completion of the throttle body unit.

By a resulting very compact design of the throttle-intake manifold unit There are significant package advantages. In addition, accounts for a bolted Need throttle body Screw thread in the intake manifold.

Prefers is The relationship the lengths L1 and L2 ≥ 0.8: 1 and ≤ 5: 1, still preferably ≥ 1: 1 and ≤ 2: 1.

Prefers is the throttle body unit with a plastic encapsulated selected from the group containing PA6 GF25, PA6.6 GF50 and mixtures thereof. These materials have proven to be advantageous in practice.

• (a) Teilweise oder vollständiges Positionieren der Drosselklappeneinheit in einer Spritzform
• (b) Herstellung des Saugrohrs durch Einspritzen von Spritzmaterial, wobei gleichzeitig eine im Wesentlichen formschlüssige Verbindung zwischen der Drosselklappeneinheit und dem Saugrohr entsteht.

An inventive method for producing a throttle valve intake manifold unit comprises the steps:

• (a) Partial or complete positioning of the throttle body unit in an injection mold
• (B) Production of the suction pipe by injection of spray material, at the same time a substantially positive connection between the throttle valve unit and the suction pipe is formed.

By This method can be the throttle valve intake manifold unit according to the invention on effective and reliable Be made way.

Prefers the throttle body is surrounded with mandrels so that the Spray material is not or substantially not in the flow-leading Part and / or penetrate into the bearings of the throttle valve unit can. This allows a throttle intake manifold unit with a high precision getting produced.

Prefers is a plastic selected from the group containing as a spray material PA6 GF25, PA6.6 GF50, and mixtures thereof. These materials have proven to be advantageous in practice.

Prefers Step (b) is carried out at a temperature of ≥ 240 ° C to ≤ 300 ° C. This can be an effective, in particular time-effective production of the throttle-intake manifold unit guaranteed become.

One method as described above and one as described above Throttle intake manifold unit according to the present invention can be used in all motor vehicles and motor vehicle types come; it does not matter whether it is e.g. around car or Truck is or whether petrol, diesel or CNG engines used come.

The the aforementioned and the claimed and in the embodiments described to be used according to the invention Components are subject in size, shape design, Material selection and technical conception no special exceptions, so that the selection criteria known in the field of application apply without restriction can find.

Further Details, features and advantages of the subject matter of the invention emerge from the dependent claims as well as from the following description of the accompanying drawings, in which - by way of example - two embodiments the throttle valve intake manifold unit according to the invention are shown. In the drawings shows:

1 a schematic longitudinal section through a throttle-suction tube unit according to a first embodiment of the invention; such as

2 a schematic longitudinal section through a throttle-suction tube unit according to a second embodiment of the invention.

1 shows a schematic longitudinal section through a throttle-suction tube unit 1 according to a first embodiment of the invention. In this, the throttle-draft tube unit was made by the throttle body 10 partly in the injection mold of the suction tube 20 was inserted and then by injection of plastic, the suction tube 20 was produced. At the same time, such a positive connection between the throttle valve unit 10 and suction pipe 20 produced.

As in 1 The ratio of the lengths L1 and L2, which are defined as above, is approximately 3: 1, while in the prior art type throttle valve intake manifolds the ratio is usually less than 0.6: 1 or even less favorable.

2 shows a schematic longitudinal section through a throttle-suction tube unit 1' according to a second embodiment of the invention. In this was the throttle body 10 ' before production of the suction tube 20 ' The connection between the throttle valve unit and the clean air tube is no longer part of the throttle valve unit, but takes place between the intake manifold and the clean air tube Embodiment be made particularly compact and is now only slightly wider axially than the flap bearing 25 , The relationship between L1 and L2 (as drawn) is particularly favorable in this embodiment.

1

Throttle valve manifold unit

1'

Throttle valve manifold unit

10

throttle unit

10 '

throttle unit

20

suction tube

20 '

suction tube

25

throttle valve bearings

Claims (10)

Throttle valve intake manifold unit for a motor vehicle, comprising a throttle valve unit and a suction tube, characterized in that the throttle valve unit is at least partially inserted into the intake manifold and so encapsulated in plastic is that thereby creates a substantially and / or completely positive connection between the throttle valve unit and the suction pipe. Throttle and intake manifold assembly according to claim 1, characterized in that the throttle body is completely in the suction pipe is inserted. Throttle valve intake manifold unit according to one of claims 1 or 2, characterized in that the ratio of the lengths L1 and L2 ≥ 0.6: 1 and ≤ 10: 1, wherein L1 is defined as the axial length the section of the throttle intake manifold unit, which pure air tube side is provided for connection to the clean air tube; and L2 defined is as axial length the rest Section of the throttle intake manifold assembly until completion of the Throttle body. Throttle valve intake manifold unit according to one of claims 1 to 3, characterized in that the ratio of the lengths L1 and L2 ≥ 0.8: 1 and ≤ 5: 1. Throttle valve intake manifold unit according to one of claims 1 to 4, characterized in that the throttle valve unit with a Plastic encapsulated is selected from the group containing PA6 GF25, PA6.6 GF50 and mixtures from that. A method of manufacturing a throttle draft tube assembly comprising the steps: (a) Partial or complete positioning of the throttle body in an injection mold (b) Manufacture of the suction tube by injection of spray material, at the same time a substantially positive connection arises between the throttle valve unit and the intake manifold. Method according to Claim 6, characterized that the throttle valve unit is surrounded with mold cores so that the spray material is not or substantially not in the flow-leading Part and / or penetrate into the bearings of the throttle valve unit can. Method according to claim 6 or 7, characterized that as a spray material containing a plastic selected from the group PA6 GF30, PA6.6 GF50 and mixtures thereof. Method according to one of claims 6 to 8, characterized that step (b) is carried out at a temperature of ≥ 240 ° C to ≤ 300 ° C. Motor vehicle comprising a throttle-intake manifold unit according to a the claims 1 to 5 and / or produced according to one of claims 6 to 9th