EP0725210B1 - Suction module - Google Patents

Description

The invention relates to a suction module, in particular for internal combustion engines at least one intake tract, at least one of several Intake pipe openings of the intake tract can be closed by means of a rotary valve are.

Such suction modules are known, for. B. from EP 480 393 A1. With this Suction modules use rotary valves that share a common axis of rotation have and are therefore combined to form a shift drum. By actuation The cross-section of the intake tracts to the cylinders can be adjusted using the shift drum downsize. This happens e.g. B. by providing two intake pipe openings in one intake tract each, one of these intake pipe openings through the Rotary valve can be closed. By summarizing the Rotary vane to a shift drum must be used in the manufacture of the intake manifold as well Shift drum high dimensional accuracy can be maintained to ensure reliability to ensure the switching element. The required dimensional accuracy has an effect negatively affects the manufacturing costs of the intake manifold. The shift drum must, for. B. in be housed in a separate housing, which in addition to the Suction pipe must be attached. At the intake manifold itself will be fewer Dimensional accuracy requirements. This can e.g. B. plastic in Die casting processes are produced.

It is therefore an object of the invention to provide a suction module of the type mentioned to improve in that an easy to manufacture, easy to assemble and reliable working cheap suction module is created.

According to the invention this object is achieved in that the cylinders leading suction tracts each have at least two suction pipes and each an intake manifold opening of the intake tract with an unchangeable cross section in the Internal combustion engine leads and at least one other intake manifold opening of the same Intake tract connected to the internal combustion engine by means of a rotary valve is. This rotary valve is floating, what z. B. by use an elastic O-ring can take place, the relative movement between a the bearing bush holding the rotary valve axis and the intake manifold housing enables. With regard to the question of installation tolerances and sound generation In the variant described, there are clear advantages.

In operating conditions in which only a part of the Intake manifold cross section is required, does not hinder any additional Part of the flow resistance, which reduces consumption accommodates. In operating conditions in which an extended Cross section is required, is on the switchable Rotary valve optimally adapted to the cross-sectional area.

An advantageous development provides that the rotary valve is arranged in the flange of the suction module. This arrangement facilitates both assembly and maintenance of the Rotary vane units. This variant leaves further different material combinations between cylinder head, Flange and rotary valve too.

Furthermore, one can advantageously provide that the Rotary valve is symmetrical to its longitudinal axis. Through the Symmetrical design gives advantages both with regard to the manufacture and operation of the Rotary valve.

An advantageous further development results if the Rotary valve and / or the suction module consists of plastic. By the execution in plastic can be clear weight and Achieve cost advantages.

Additional advantageous developments result from the remaining subclaims.

These and other features of preferred developments of the In addition to the claims, the invention is also apparent from the description and the drawings.

Figur 1 eine Draufsicht des Saugmoduls,

Figur 2 ein Schnitt entlang der Linie A - A,

Figur 3 ein Schnitt durchs Drehschiebergehäuse,

Figur 4 eine Draufsicht in Pfeilrichtung X,

Figur 5 Drehschieber, schwimmend gelagert,

Figur 6 Drehschieber, ballig gelagert.

The drawing shows:

FIG. 1 shows a top view of the suction module,

FIG. 2 shows a section along the line AA,

FIG. 3 shows a section through the rotary valve housing,

FIG. 4 shows a plan view in the direction of the arrow X,

FIG. 5 rotary slide valve, floating,

Figure 6 rotary valve, crowned.

As shown in FIG. 1, the suction module consists of a suction pipe 1, flange 2 and vacuum box 3. The integration of Rotary slide valve 4 is on average in both Figure 2 and in Figure 3 shown in its installation position in the flange 2.

The symmetry with respect to the longitudinal axis is particularly evident in FIG. 3 clear. The rotary valve 4 only regulates the Flow cross section of one of the two intake pipe openings 5, so that the other intake manifold opening 6 always without flow increasing elements the combustion mixture can forward. The separation of the associated intake pipe openings 5 and 6 in the flange area is clear in Figure 3. This Separation of the openings and opening or opening as required Closing by rotary slide 4 guarantees an optimal Combustion in every operating state and the resulting resulting reduction in fuel consumption. The stake lean mixtures are possible in all operating conditions. The use of plastic as a material for intake manifold 1, Flange 2 and rotary valve 4 reduce the weight and the Manufacturing costs.

The floating storage of rotary valve 4 takes place by means of a plastic bushing 8 doped with lubricants on the Rotary slide axis 7 and the associated O-ring 9, which in there is space for a housing recess.

In a further exemplary embodiment, as in FIG shown, the rotary valve axis 7 crowned and the Material combination axle / bearing bush with lubricant doped Plastic chosen.

Reference list

1

Intake manifold

2nd

flange

3rd

Vacuum box

4th

Rotary valve

5

Intake pipe opening

6

Intake pipe opening

7

Rotary slide longitudinal axis

8th

Plastic bearing bush

9

O-ring

Claims (9)

1. Suction module, more especially for internal combustion engines, having at least one induction section, the induction section having at least two induction manifold openings (5, 6), and at least one induction manifold opening (6) of the induction section leading with an unchangeable cross-section into the internal combustion engine, and at least one other induction manifold opening (5) of the same induction section being connected to the internal combustion engine by means of a rotary slide valve (4), characterised in that the rotary slide valve (4) is detachably mounted.
2. Suction module according to claim 1, characterised in that the rotary slide valve (4) is disposed in the flange (2) of the suction module.
3. Suction module according to one or more of the above-mentioned claims, characterised in that the rotary slide valve (4) is symmetrical relative to the rotary slide valve longitudinal spindle (7).
4. Suction module according to one or more of the above-mentioned claims, characterised in that the rotary slide valve (4) and/or the suction module are/is made of plastics material.
5. Suction module according to one or more of the above-mentioned claims, characterised in that the rotary slide valve spindle has a bearing bush (8) and an O-ring (9).
6. Suction module according to one or more of the above-mentioned claims, characterised in that the rotary slide valve (4) is controlled by means of reduced pressure.
7. Suction module according to one or more of the above-mentioned claims, characterised in that the rotary slide valve (4) is controlled electromagnetically and/or hydraulically.
8. Suction module according to one or more of the above-mentioned claims, characterised in that at least two rotary slide valves (4) are controlled by means of a coupled push-and-pull rod.
9. Suction module according to one or more of the above-mentioned claims, characterised in that the rotary slide valve plastics material is doped with lubricants.

Images