This application is a National Stage application which claims the benefit of International Application No. PCT/EP2008/065453 filed Nov. 13, 2008, which claims priority based on German Application No. 10 2007 056 154.9, filed Nov. 21, 2007, both of which are hereby incorporated by reference in their entirety.
The invention relates to a supercharger device, particularly an exhaust gas turbocharger for a motor vehicle. The invention additionally relates to a combustion engine for a motor vehicle equipped with such a supercharger device.
Exhaust gas turbochargers are usually employed to increase the performance of piston engines, wherein they increase an air and fuel throughput per work cycle. The exhaust gas turbocharger driven by the exhaust gas flow of the piston engine compresses the air fed to the combustion chamber, wherein, because of different engine operating states, it can be advantageous to decouple the compressed air flow fed to the combustion chamber from the exhaust gas flow, so that more preferably efficiency, response characteristics or operating range of the exhaust gas turbocharger can be improved. Such intervention for controlling the exhaust gas turbocharger can for example be achieved through a variable geometry of the nozzle ducts leading to the turbine wheel.
From DE 102 62 006 B4 an exhaust gas turbocharger with a variable turbine geometry is known, which is realised via a vane mounting ring with guide vanes rotatably mounted thereon/therein, wherein the guide vanes can be adjusted via an adjusting ring mounted coaxially to the vane mounting ring and rotatably with respect to the latter. Here, at least three roller bearings are rotatably mounted on the vane mounting ring, which in turn support the adjusting ring via a respective circumferential groove. Here, the roller bearings supporting the adjusting ring can be exclusively mounted in the vane mounting ring or additionally in a housing part, which improves the mounting but significantly aggravates the installation, that is the assembly.
A further charging device with a variable turbine geometry is known for example from EP 1 009 918 B1.
The present invention deals with the problem of stating an improved embodiment for a generic supercharger device which is more preferably characterized by improved mounting of an adjusting ring.
According to the invention, this problem is solved through the subjects of the independent claims. Advantageous embodiments are the subject of the dependent claims.
The invention is based on the general idea of mounting an adjusting ring coupled with the guide vanes of a guide vane device via slide or roller bearings, wherein these slide or roller bearings are provided on a respective locating pin which penetrates a vane mounting ring carrying the guide vanes and defines its spacing from a housing or from an insert piece/cover disc element arranged therein. Here, the adjusting ring is arranged coaxially to the vane mounting ring and mounted on the latter via the mentioned roller or slide bearings. The adjustment of the guide vanes mounted on the vane mounting ring is brought about via a rotation of the adjusting ring relative to the vane mounting ring. Through the mounting of the adjusting ring on the vane mounting ring via slide or roller bearings, each of which is arranged on a locating pin penetrating the vane mounting ring, the mounting of the adjusting ring can be simplified and the part variety of the supercharger device according to the invention reduced, since the roller or the slide bearings now no longer need to be mounted on the vane mounting ring separately from the locating pins, but can be fixed on the vane mounting ring via the locating pins. Thus the locating pins fulfil two objectives simultaneously, namely defining an axial spacing between the vane mounting ring and a housing or an insert piece/cover disc element arranged in the latter and also acting as carrier for the slide or roller bearings. Because of this, the supercharger device can more preferably also be designed simpler, which contributes to keeping maintenance or repair expenditure low while lowering the manufacturing costs for the supercharger device according to the invention at the same time. In addition, the roller or slide bearings carried by the locating pins ensure particularly smooth-running mounting of the adjusting ring and thus particularly high mounting quality. The high mounting quality here is also responsible for high adjusting accuracy of the guide vane, as a result of which the supercharger device according to the invention can be adapted to the respective operating situation with particular accuracy.
With an advantageous further development of the solution according to the invention a roller bearing with a rotatably mounted bearing roller is provided on each locating pin. A bearing roller rotatably mounted in such a manner can also be produced simply and thus cost-effectively and additionally guarantees particularly smooth-running mounting of the adjusting ring. Here, the adjusting ring can be guided via a ring groove worked into the respective bearing roller in which the adjusting ring engages. With a further advantageous embodiment of the solution according to the invention at least one locating pin comprises a collar at its end carrying the roller bearing, which collar forms an axial stop for the bearing roller. A collar moulded on to the locating pin in such a manner can be produced simply and preferentially in a single common operation together with the locating pin, wherein the locating pin with its longitudinal end facing away from the collar has to be inserted through the vane mounting ring. Obviously, other axial stops for the bearing roller are also conceivable, more preferably clamping pins or lock nuts for example.
Practically at least one locating pin comprises a first radial step via which said locating pin supports itself on the vane mounting ring, wherein an axial spacing between the first radial step and the collar of the locating pin is greater than an axial extension of the roller bearing or the bearing roller so that the latter is arranged with play between the vane mounting ring and the collar of the locating pin. Via the according to the invention first radial stage an axial spacing or accurate position of the locating pin to the vane mounting ring can be predetermined, wherein, when the first radial step contacts the vane mounting ring, the axial spacing between the vane mounting ring and the collar of the locating pin remaining for the bearing roller is greater than the axial longitudinal extension of the bearing roller, so that the latter can always be mounted on the vane mounting ring via the locating pin in a smooth-running manner without jamming. A further measure for ensuring the mounting of the bearing roller without jamming is therefore not required, wherein the first radial step can be produced simply in terms of production and consequently does not burden the supercharger device with additional spacer elements which have to be produced separately for example.
Further important features and advantages of the invention are obtained from the subclaims, from the drawings and from the corresponding figure description by means of the drawings.
It is to be understood that the features mentioned above and still to be explained in the following can not only be used in the respective combination stated, but also in other combinations or by themselves, without leaving the scope of the present invention.
Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein same reference characters refer to same or similar or functionally same components.
Here it shows in each case schematically,
According to
In order to render mounting of the adjusting ring 5 rotatably designed with respect to the vane mounting ring 3 as simple as possible constructionally it is provided according to the invention that mounting of the adjusting ring 5 takes place on the vane mounting ring 3 via slide or roller bearings, each of which is arranged on a locating pin penetrating the vane mounting ring 3. The locating pin 9 simultaneously serves to define an axial spacing of the vane mounting ring 3 from a housing or from an insert piece/cover disc element 10 arranged therein. As is more preferably evident in
According to
In order to be able to also fix the axial stop 12 with defined axial spacing from the vane mounting ring 3 an additional, namely a fourth radial step 16 can be provided, which in the assembled state is abutted by the axial stop 12. Here, the bearing roller 11 is mounted on the locating pin 9 in a smooth-running manner according to
Instead of the axial stop 12 shown according to
According to
Considering the embodiment according to
In contrast with
Preferentially, fastening of the locating pin 9 to the insert piece/cover disc element 10 or on the housing is provided by means of rivets, screws or welding with all supercharger devices 1 shown.
According to
Through the supercharger device according to the invention particularly simple and highly functional mounting of the adjusting ring 5 on the vane mounting ring 3 can be realised, since the locating pins 9, which define an axial spacing between the vane mounting ring 3 and the insert piece/cover disc element 10, simultaneously function as carriers for the bearing rollers 11 or bearing heads 21 supporting the adjusting ring 5. Because of this a reduction of the parts variety is additionally achieved, as a result of which storage and logistics costs can also be reduced.
Number | Date | Country | Kind |
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10 2007 056 154 | Nov 2007 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2008/065453 | 11/13/2008 | WO | 00 | 8/23/2010 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2009/065763 | 5/28/2009 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
6145313 | Arnold | Nov 2000 | A |
6679057 | Arnold | Jan 2004 | B2 |
7396204 | Shiraishi et al. | Jul 2008 | B2 |
20050252210 | Shiraishi et al. | Nov 2005 | A1 |
Number | Date | Country |
---|---|---|
10213897 | Oct 2003 | DE |
10337491 | Mar 2005 | DE |
10337495 | Mar 2005 | DE |
10262006 | Sep 2005 | DE |
102004023209 | Dec 2005 | DE |
102004023279 | Dec 2005 | DE |
102004037082 | Mar 2006 | DE |
102005019938 | Nov 2006 | DE |
102006048514 | May 2007 | DE |
102006007347 | Aug 2007 | DE |
102008020932 | Oct 2009 | DE |
1009918 | Nov 2004 | EP |
1662094 | May 2006 | EP |
WO-2009115451 | Sep 2009 | WO |
Entry |
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Abstract provided for DE102006045514. |
Abstract provided for DE102006007347. |
Abstract provided for DE102005019938. |
Abstract provided for DE102008020932. |
Abstract provided for DE10213897. |
Abstract provided for DE10262006. |
Abstract provided for DE10337491. |
Abstract provided for EP1662094. |
International Search Report dated Nov. 13, 2009. |
German Search Report for DE102007056154.9. |
English abstract for DE-10337495. |
English abstract for DE-102004023209. |
English abstract for DE-102004023279. |
English abstract for DE-102004037082. |
Number | Date | Country | |
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20100316489 A1 | Dec 2010 | US |