DE202008009503U1 - Arrangement for controlling a switching or swirl flap shaft - Google Patents

Abstract

Arrangement for controlling a drive device for a switching or swirl flap shaft (1) with at least one stop (3, 4), characterized in that stops (3, 4) are provided in both directions of rotation of the switching or swirl flap shaft (1), wherein the Stops (3, 4) and stop elements (2) on the switching or swirl flap shaft (1) are formed so that at one end of the switching or swirl flap shaft (1) the switching or swirl flap shaft (1) is rotatable by an additional rotation angle until the respective stop element (2) rests against the stop (3, 4).

Description

Technical area

The The invention relates to an arrangement for controlling a drive device for a switching or swirl flap shaft with a double stop for Control of switching or swirl flaps in an internal combustion engine, according to the preamble of the main claim.

State of the art

It is for example from the DE 40 17 671 C2 It is known that a switching or swirl flap for the internal combustion engine of a motor vehicle is adjusted via a drive by means of a backlash-free and rotationally fixed connection. When transferring your torque to the switching or swirl valve shaft here is a stop function available, which limits the rotation angle.

It Moreover, it is well known that a Such switching or swirl flap shaft at least on one side with a Drive is connected, which has a torque via a drive connection such can transmit to the switching or swirl flap shaft, that when changing the direction of rotation a predetermined rotation angle range, which is limited by one stop, is torque-free. Such drive connections usually always have a certain Rotation angle range between the stops on, as the Connection between the drive and the switching or swirl valve shaft usually not free of play when using plastic can be realized.

at Such shaft drives for switching or swirl flaps in an internal combustion engine is at a stop at the shaft end by the torque or the driving force the switching or swirl valve shaft also in not negligible way twisted, so that the position of the switching or swirl flaps over the wavelength is relatively indefinite.

at a stop on the drive side in the other direction in this case no driving force is transmitted to the shaft, because the switching or swirl flap is in the rest position and Thus, the entire arrangement is momentless. By one on the Switch or swirl flap possibly acting air flow The shaft and / or the drive connection to so-called micro-movements be stimulated, the switching or swirl flap shaft and / or the drive connection over the resulting game eventually also can destroy.

Disclosure of the invention

A Arrangement for controlling a drive connection for a Switch or swirl shaft is used to make a better Connection between the drive and the switching or swirl valve shaft according to the invention in an advantageous manner so executed that stops in both directions of rotation the switching or swirl valve shaft are present, the attacks and are formed on stop elements on the switching or swirl flap shaft so that at one end of the switching or swirl flap shaft, the switching or swirl shaft by an additional rotation angle is rotatable until the respective stop element abuts against the stop.

at in each case an advantageous embodiment of the invention Arrangement is on the drive side of the switching or swirl valve shaft or at the opposite end the switching or swirl flap shaft by an additional angle of rotation, for example 3 °, rotatable until the respective stop element abuts against the stop. The drive connection is preferably made of plastic.

According to the Invention can thus the two stops Both shaft ends can be realized in a simple way so that in both directions of rotation, a twist or twist of the switching or swirl shaft occurs, the twist over the attacks, or about the additional Rotation angle, for example, 3 °, is controlled.

aim The invention is thus, by the shaft drive a defined To bring bias into the switching or swirl valve shaft. Consequently the switching or swirl valve shaft is slightly distorted and if the force of twisting greater than, for example the flow forces at the switching or swirl flaps during operation, this can be particularly advantageous Do the aforementioned harmful micro-movements be prevented.

in this connection would a stop at the shaft end a very high bias and permanent load on the driver on the drive side mean and a stop at the beginning of the shaft the lowest load for bring the driver of the drive connection with them, but the Switch or swirl flap shaft is largely torque-free because the torques over the stop in the body be directed. With the proposed defined twist now becomes a defined torque on the switching or swirl valve shaft applied to the flow at the switching or swirl flap counteracts and the brunt but further into the body passes.

Furthermore leads the restoring force of twisting or twisting always to a concern of the contact surfaces on the shaft or the drive connection, so that in both end points of the rotational movement There is a play-free connection between the drive and the shaft. Thus, as previously mentioned, then no micro-movements be excited, which may destroy the drive connection can.

Brief description of the drawings

The Invention will be explained with reference to the figures of the drawing. Show it:

1 a view of parts of a drive connection for a switching or swirl flap shaft,

2 a schematic of a driven switching or swirl shaft and

2a and 2 B each cuts AA and BB from the 2 at the switching or swirl shaft ends.

Embodiment (s) of the invention

In 1 is an embodiment of a switching or swirl flap shaft 1 shown with a not shown and explained control for switching or swirl flaps for controlling the intake air in an internal combustion engine. The switching or swirl valve shaft 1 has a stop element 2 on, in the one direction of rotation at a stop 3 and in the other direction of rotation at a stop 4 is applied.

Out 2 is a schematically indicated switching or swirl flap shaft 1 with the stop elements 2 on the drive device and 2 ' at the other end of the switching or swirl valve shaft 1 shown. Out 2a is to be taken in section AA, as the stop element 2 ' directly (angle of rotation α = 0 °) at the stop 3 is applied. Out 2 B is taken in section BB, as the stop element 2 but still by an additional rotation angle β, from here for example 3 °, to the stop 3 on this side of the switching or swirl valve shaft 1 has to be turned further to fit here.

Thus, according to the embodiment of the invention by the additional rotation angle a defined bias in the switching or swirl flap shaft 1 introduced, which this biases and thus the flow and the initially mentioned harmful micro-movements are prevented by an air flow to the switching or swirl flaps.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4017671 C2 [0002]

Claims (5)

Arrangement for controlling a drive device for a switching or swirl flap shaft ( 1 ) with at least one stop ( 3 . 4 ), characterized in that stops ( 3 . 4 ) in both directions of rotation of the switching or swirl flap shaft ( 1 ), the stops ( 3 . 4 ) and stop elements ( 2 ) at the switching or swirl flap shaft ( 1 ) are formed so that at one end of the switching or swirl flap shaft ( 1 ) the switching or swirl flap shaft ( 1 ) is rotatable by an additional angle of rotation until the respective stop element ( 2 ) at the stop ( 3 . 4 ) is present. Arrangement according to claim 1, characterized that the additional rotation angle is 3 °. Arrangement according to claim 1 or 2, characterized in that on the drive side of the switching or swirl flap shaft ( 1 ) the switching or swirl flap shaft ( 1 ) is rotatable by an additional angle of rotation until the respective stop element ( 2 ) at the stop ( 3 . 4 ) is present. Arrangement according to claim 1 or 2, characterized in that on the drive side of the switching or swirl flap shaft ( 1 ) En de the switching or swirl flap shaft ( 1 ) is rotatable by an additional angle of rotation until the respective stop element ( 2 ) at the stop ( 3 . 4 ) is present. Arrangement according to one of the preceding claims, characterized in that the drive connection with the stops ( 3 . 4 ) and the stop elements ( 2 ) is made of plastic.