Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Patent
1995-05-02
1996-06-25
Koczo, Michael
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
417407, F02B 3700
Patent
active
055289029
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a support housing for exhaust gas turbochargers which can be placed on an internal-combustion engine and, more particularly, to a support housing for at least two exhaust gas turbochargers which can be placed on an internal-combustion engine. The exhaust gas turbochargers are each constructed with two blade wheels arranged on a common shaft. One blade wheel is arranged in a compressor housing and the other is arranged in a turbine housing. The common shaft is in each case disposed in a bearing housing arranged between the compressor housing and the turbine housing. The turbine housings of the exhaust gas turbochargers form flow spaces which each comprise a spiral duct, an adjoining, radially interior blade wheel duct and an axially directed outlet duct. The support housing is constructed as a box-type supporting device for the exhaust gas turbochargers which contains a hollow space and on which the exhaust gas turbochargers are fastened. The compressor housings are arranged outside the hollow space and the turbine housings are arranged inside the hollow space. Recesses for passing-through the shafts of the exhaust gas turbochargers are provided in the walls of the support housing as well as openings for feeding and removing the exhaust gases to and from the turbine housings.
A support housing of the above described type is known from German Patent document DE 34 39 738 C2. In the case of this known supercharged internal-combustion engine, the turbine housing of the exhaust gas turbocharger is arranged in a hollow space formed by a support housing. The compressor housing of the exhaust gas turbocharger is disposed outside the hollow space. For the purpose of fastening, the exhaust gas turbocharger is received, together with its bearing housing, in a cylindrical recess of the lateral wall of the support housing. The exhaust gas turbocharger is fastened on the support housing by using screws. This cylindrical recess for receiving the bearing housing is formed by two semicircular recesses having an upper and a lower part on the edges. On the edges of the upper and lower part, the support housing is composed. When the upper part is taken off, the exhaust gas turbocharger can be inserted in the recess at the lower part for assembly purposes. The assembly can be completed when the upper part is fitted back on.
The bearing housing of an exhaust gas turbocharger according to German Patent document DE 35 32 695 C1, is at the same time, constructed as an engine support arranged between an elastic bearing and the internal-combustion engine. In this dual function as a bearing housing and as an engine support, a savings in components is achieved which has corresponding advantages. However, it is not always possible or desirable to arrange an exhaust gas turbocharger in an area of the internal-combustion engine in which the bearing housing is used as an engine support.
In the case of a supercharged internal-combustion engine according to German Patent document DE 30 05 655 C2, a support housing placed on the internal-combustion engine, which is composed of a lower part and an upper part, is also used for the space-saving fastening of exhaust gas turbochargers. In this case, the turbine housings of the exhaust gas turbochargers and the corresponding exhaust gas pipes are arranged inside a hollow space formed by the support housing. The compressor housings with the corresponding charge air pipes are situated outside the hollow space. The exhaust gas turbochargers, which are arranged with horizontal axes, are disposed in the area of the bearing housings in semi-cylindrical recesses of the edge areas of the upper and the lower part. The upper and lower parts rest against one another in a horizontal dividing joint. When the upper part is removed, an exhaust gas turbocharger can be inserted for assembly purposes in the recess on the bottom part and, after the upper part is fitted back on, can be fastened by means of screws on the upper and the lower part.
In the
REFERENCES:
patent: 2582916 (1952-01-01), Taub
patent: 3673798 (1972-07-01), Kuehl
patent: 4344289 (1982-08-01), Curiel et al.
patent: 4400945 (1983-08-01), Deutschmann et al.
Eberhardt Edmund
Hoerl Guenther
Koczo Michael
MTU Motoren - und Turbinen-Union Friedrichshafen GmbH
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