U.S. patent application number 14/237365 was filed with the patent office on 2014-07-10 for bearing housing of an exhaust-gas turbocharger.
This patent application is currently assigned to BORGWARNER INC.. The applicant listed for this patent is Lothar Koenig, Thomas Koerner, William Passemard. Invention is credited to Lothar Koenig, Thomas Koerner, William Passemard.
Application Number | 20140193244 14/237365 |
Document ID | / |
Family ID | 47715369 |
Filed Date | 2014-07-10 |
United States Patent
Application |
20140193244 |
Kind Code |
A1 |
Koerner; Thomas ; et
al. |
July 10, 2014 |
BEARING HOUSING OF AN EXHAUST-GAS TURBOCHARGER
Abstract
A bearing housing (1) of an exhaust-gas turbocharger (2) having
an oil inlet (3) which is connected to a connecting region (4) of
an oil supply line (5), The connecting region (4) of the oil supply
line (5) is in the form of a siphon (6).
Inventors: |
Koerner; Thomas;
(Recklinghausen, DE) ; Koenig; Lothar;
(Schmalenberg, DE) ; Passemard; William;
(Heidelberg, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Koerner; Thomas
Koenig; Lothar
Passemard; William |
Recklinghausen
Schmalenberg
Heidelberg |
|
DE
DE
DE |
|
|
Assignee: |
BORGWARNER INC.
Auburn Hills
MI
|
Family ID: |
47715369 |
Appl. No.: |
14/237365 |
Filed: |
August 6, 2012 |
PCT Filed: |
August 6, 2012 |
PCT NO: |
PCT/US12/49701 |
371 Date: |
February 6, 2014 |
Current U.S.
Class: |
415/170.1 |
Current CPC
Class: |
F05D 2240/53 20130101;
F01M 5/021 20130101; F01D 25/16 20130101; F05D 2220/40 20130101;
F01D 25/186 20130101; F02B 39/14 20130101 |
Class at
Publication: |
415/170.1 |
International
Class: |
F01D 25/16 20060101
F01D025/16 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 16, 2011 |
DE |
10 2011 110 823.1 |
Claims
1. A bearing housing (1) of an exhaust-gas turbocharger (2) having
an oil inlet (3) which is connected to a connecting region (4) of
an oil supply line (5), wherein the connecting region (4) of the
oil supply line (5) is in the form of a siphon (6).
2. The bearing housing as claimed in claim 1, wherein the oil
supply line (5) and the siphon (6) are provided with an
encapsulation (7).
3. The bearing housing as claimed in claim 1, wherein the oil
supply line (5) and the siphon (6) are shielded by heat shields (8,
9).
4. The bearing housing as claimed in claim 1, wherein the siphon
(6) is provided with a heating device (10).
5. The bearing housing as claimed in claim 4, wherein the heating
device (10) is in the form of a heating coil which is laid around
the siphon (6).
6. The bearing housing as claimed in claim 4, wherein the heating
device (10) is integrated in the siphon (6).
Description
[0001] The invention relates to a bearing housing of an exhaust-gas
turbocharger as per the preamble of claim 1.
[0002] A fast supply of oil to the bearing arrangement of an
exhaust-gas turbocharger is essential in particular during a cold
start at low temperatures. Since the hot oil in the lines can drain
out after the shutdown of the engine and under some circumstances
the supply of oil takes too long during a cold start owing to high
oil viscosity, damage to the bearing points can occur.
[0003] It is thus an object of the present invention to provide a
bearing housing of the type specified in the preamble of claim 1,
which bearing housing has an oil supply device which is of simple
construction and which permits an adequate supply of oil to the
bearing points of the bearing housing even during a cold start.
[0004] Said object is achieved by means of the features of claim
1.
[0005] According to the invention, the connecting region of the oil
line is in the form of a siphon, which in the simplest case can be
realized by means of a minor adaptation of the oil line running
from the oil filter to the bearing housing of the exhaust-gas
turbocharger. This is because the siphon may be formed as a type of
kink in the oil line and collects the oil after the shutdown of the
engine, which oil can then no longer flow out of the siphon.
[0006] The siphon is preferably arranged as close as possible to
the inlet to the bearing housing. During a cold start, the oil is
pumped to the bearing points by the pressure waves in the line as
the engine is started. It is thus ensured in a simple manner that
the bearing points of the bearing housing of the exhaust-gas
turbocharger are supplied quickly and adequately with oil even in
cold start phases.
[0007] The subclaims relate to advantageous refinements of the
invention.
[0008] To avoid problems with oil carbon formation, in particular
in the region of the siphon, in the post-heating phase, the oil
supply line and also the siphon may be insulated. For this purpose,
it is conceivable for the oil line or the siphon to be encapsulated
or for heat shields to be provided in the region of the siphon and
of the oil supply line.
[0009] To heat the oil which is highly viscous at low temperatures
and thereby reduce the viscosity, the siphon may also be heated
during the starting process. For this purpose, it is for example
possible for a heating device to be integrated in the siphon or for
a heating device in the form of a heating coil to be laid around
the siphon.
[0010] Further details, features and advantages of the invention
will emerge from the following description of exemplary embodiments
on the basis of the drawing, in which:
[0011] FIG. 1 shows a schematically highly simplified illustration
of an exhaust-gas turbocharger which can be provided with a bearing
housing according to the invention,
[0012] FIG. 2 shows a partial view of the bearing housing according
to the invention as per a first embodiment, and
[0013] FIG. 3 shows an illustration, corresponding to FIG. 2, of
the bearing housing as per a second embodiment.
[0014] FIG. 1 is a schematically highly simplified sketch of an
exhaust-gas turbocharger 2 for the purpose of illustrating its
basic components.
[0015] The exhaust-gas turbocharger 2 has a bearing housing 1 which
connects a turbine housing 11 to a compressor housing 12. The
exhaust-gas turbocharger 2 self-evidently also has all of the other
conventional components, such as in particular a turbine wheel, a
rotor shaft and a compressor wheel, but these are not discussed in
detail because they are not necessary for explaining the principles
of the present invention.
[0016] FIG. 2 illustrates a part of the bearing housing 1 according
to the invention likewise in schematically simplified form. The
bearing housing 1 is provided with an oil inlet 3 to which a
connecting region 4 of an oil supply line 5 is connected.
[0017] As shown in FIG. 2, the connecting region 4 is in the form
of a siphon 6 which is formed by a kink in the line, at which kink
oil can collect after the shutdown of the engine without said oil
flowing into the bearing housing 1, and said oil is thus in
particular available for a cold start.
[0018] In the simplest case, to form the siphon 6, the oil supply
line 5 is adapted or relocated accordingly. It is however
alternatively also conceivable for the siphon 6 to be a separately
producible component which is then connected at one end to an end
region 13 of the oil supply line 5 and at another end region to a
connecting piece 14 of the oil inlet 3.
[0019] In the embodiment illustrated in FIG. 2, both the oil supply
line 5 and also the siphon 6 are surrounded by an encapsulation 7
which prevents an excessive introduction of heat into the oil
supply line 5 and the siphon 6.
[0020] FIG. 3 is an illustration of the bearing housing 1
corresponding to FIG. 2, but differs from the embodiment as per
FIG. 2 by the provision of a heating device 10 which, in the
example, is in the form of a heating coil which is laid around the
siphon 6, as can be seen in detail from FIG. 3. Furthermore, in the
example of FIG. 3, two heat shields 8 and 9 are provided instead of
the encapsulation 7, which heat shields prevent an excessive
introduction of heat into the oil supply line 5 and the siphon 6.
It would self-evidently also be possible in the embodiment as per
FIG. 2 for heat shields 8 and 9 of said type to be provided instead
of the encapsulation 7.
[0021] As an alternative to a heating coil which is laid around the
siphon 6 as in FIG. 3, the heating device 10 could also be
integrated in the siphon 6.
[0022] In addition to the above written disclosure of the
invention, reference is hereby made explicitly to the diagrammatic
illustration thereof in FIGS. 1 to 3.
LIST OF REFERENCE NUMERALS
[0023] 1 Bearing housing [0024] 2 Exhaust-gas turbocharger [0025] 3
Oil inlet [0026] 4 Connecting region [0027] 5 Oil supply line
[0028] 6 Siphon [0029] 7 Encapsulation [0030] 8, 9 Heat shields
[0031] 10 Heating device [0032] 11 Turbine/Turbine housing [0033]
12 Compressor/Compressor housing [0034] 13 Connecting region [0035]
14 Connecting piece
* * * * *