GB2401652A - Turbocharger having exhaust gas recirculating system for preventing gas leakage. - Google Patents

Turbocharger having exhaust gas recirculating system for preventing gas leakage. Download PDF

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Publication number
GB2401652A
GB2401652A GB0311127A GB0311127A GB2401652A GB 2401652 A GB2401652 A GB 2401652A GB 0311127 A GB0311127 A GB 0311127A GB 0311127 A GB0311127 A GB 0311127A GB 2401652 A GB2401652 A GB 2401652A
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GB
United Kingdom
Prior art keywords
turbine
control rod
turbocharger apparatus
conducted
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0311127A
Other versions
GB0311127D0 (en
GB2401652B (en
Inventor
Malcolm George Leavesley
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Individual
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Individual
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Filing date
Publication date
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Priority to GB0311127A priority Critical patent/GB2401652B/en
Publication of GB0311127D0 publication Critical patent/GB0311127D0/en
Publication of GB2401652A publication Critical patent/GB2401652A/en
Application granted granted Critical
Publication of GB2401652B publication Critical patent/GB2401652B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Supercharger (AREA)

Abstract

Turbocharger apparatus (1) comprising a housing (4), a compressor mounted for rotation in the housing (4), a turbine mounted for rotation in the housing (4), a first inlet for enabling air to be conducted to the compressor, an outlet for enabling air from the compressor to be conducted to an engine, a second inlet for enabling exhaust gases from the engine to be conducted to the turbine in order to rotate the turbine, a chamber which surrounds the turbine and which receives the exhaust gases from the second inlet before the exhaust gases are conducted to the turbine, a bearing assembly for permitting the rotation of the turbine, and a control system (5, 10) for controlling the speed of the turbine, the control system (5, 10) having an exhaust gas recirculation system (3) for preventing exhaust gas leakage from the turbocharger apparatus (1).

Description

TURBOCHARGER APPARATUS HAVING AN
EXHAUST GAS RECIRCULATING SYSTEM FOR
PREVENTING GAS LEAKAGE FROM
THE TURBOCHARGER APPARATUS
This invention relates to turbocharger apparatus and, more especially, this invention relates to turbocharger apparatus having an exhaust gas recirculating system for preventing gas leakage from the turbocharger apparatus. By preventing gas leakage from the turbocharger apparatus, all of the exhaust gases from an engine may be treated by the exhaust system after-treatment apparatus, for example by a catalyst system and/or a particulate system.
Turbocharger apparatus is known comprising a housing, a compressor mounted for rotation in the housing, a turbine mounted for rotation in the housing, a first inlet for enabling air to be conducted to the compressor, an outlet for enabling air from the compressor to be conducted to an engine, a second inlet for enabling exhaust gases from the engine to be conducted to the turbine in order to rotate the turbine, a chamber which extends around the turbine and which receives the exhaust gases from the second inlet before the exhaust gases are conducted to the turbine, a bearing assembly for permitting the rotation of the turbine, a heat shield for shielding the bearing assembly from the exhaust gases, and a control system for controlling the speed of the turbine.
One of the problems with such known turbocharger apparatus is that there is exhaust gas leakage from the turbocharger apparatus. This exhaust gas leakage from the turbocharger apparatus causes a problem because the exhaust gases that manage to leak by the turbocharger apparatus have not been treated by the exhaust gas after-treatment apparatus that may be fitted to a vehicle having the turbocharger apparatus.
The problem of gas leakage is difficult to solve because of the high temperature change under which the turbocharger apparatus has to work.
This temperature may exceed 1 000 C, so that the control systems that have to work within the turbine housing of the turbocharger apparatus have to be designed to have a working clearance, so that parts do not seize when the turbocharger apparatus is working at the high temperatures. The working clearance allows some exhaust gases to leak by the turbine housing control systems or a control system for the bearing housing assembly.
It is an aim of the present invention to obviate or reduce the above mentioned problems.
Accordingly, in one non-limiting embodiment of the present invention there is provided turbocharger apparatus comprising a housing, a compressor mounted for rotation in the housing, a turbine mounted for rotation in the housing, a first inlet for enabling air to be conducted to the compressor, an outlet for enabling air from the compressor to be conducted to an engine, a second inlet for enabling exhaust gases from the engine to be conducted to the turbine in order to rotate the turbine, a chamber which surrounds the turbine and which receives the exhaust gases from the second inlet before the exhaust gases are conducted to the turbine, a bearing assembly for permitting the rotation of the turbine, and a control system for controlling the speed of the turbine, the control system having an exhaust gas recirculation system for preventing exhaust gas leakage from the turbocharger apparatus.
The turbocharger apparatus of the present invention may be, for example, variable geometry turbocharger apparatus, or waste gated turbocharger apparatus.
The turbocharger apparatus may be one in which the control system has a control rod, and in which the exhaust gases that leak past the control rod enter into a vacuum groove from where the gases are able to be taken under vacuum back into an engine system and thereby to prevent gas leakage from the turbocharger apparatus.
The turbocharger apparatus may be one in which the vacuum groove is in the control rod.
The turbocharger apparatus may include a bush for the control rod.
In this case, the vacuum groove may be in the bush for the control rod.
The turbocharger apparatus may be one in which the control system includes a gas recirculation pipe, and in which the gas recirculation pipe is mounted in the bush for the control rod.
The turbocharger apparatus of the present invention may include a control rod that rotates during use of the turbocharger apparatus, the control rod being such that it allows gas recirculation. Alternatively, the turbocharger apparatus may include a control rod that moves with a linear movement during use of the turbocharger apparatus, the control rod being such that it allows gas recirculation.
The turbocharger apparatus may be one which includes a gas recirculation system that allows cooling air under vacuum to cool the control rod and the bush for the control rod.
A vacuum pipe may be fitted into the vacuum groove, the vacuum pipe allowing the leaked exhaust gases to be returned to the engine system, or through the turbocharger compressor system, in order to prevent the gas leakage.
The recirculating system may be used to cool the area around the control rod so as to enable the mounting of the control system closer to the turbine housing than would otherwise be possible.
The present invention also provides turbocharger apparatus having a control rod system that allows cooling air to pass through vent holes in the control rod.
The turbocharger apparatus having the control rod system may comprise a housing, a compressor mounted for rotation in the housing, a turbine mounted for rotation in the housing, a first inlet for enabling air to be conducted to the compressor, an outlet for enabling air from the compressor to be conducted to an engine, a second inlet for enabling exhaust gases from the engine to be conducted to the turbine in order to rotate the turbine, a chamber which surrounds the turbine and which receives the exhaust s gases from the second inlet before the exhaust gases are conducted to the turbine, and a bearing assembly for permitting the rotation of the turbine.
Embodiments of the invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 is a part section of turbocharger apparatus showing part of a turbine housing with an exhaust gas re-circulation system; Figure 2 shows a turbine housing assembly with a control assembly having a rotating control rod, and with the exhaust gas recirculating system; Figure 3 shows a turbocharger assembly having variable geometry turbocharger apparatus with a control rod system that slides along a bush, with the exhaust gas recirculation system; Figure 4 shows the system of Figure 3, with the control rod in its closed position, and with a groove in the bush; Figure 5 shows the system of Figure 4, with the control rod being shown in its fully open position, and a sealing ring not being allowed to enter into a groove area in the bush; Figure 6 shows the system of Figures 3, 4 and 5, and shows the groove in the control rod, the groove allowing the exhaust gases to be taken back to the engine under vacuum; Figure 7 shows cooling holes in a cooling rod to help prevent heat transfer to a control unit; and Figure 8 shows how heat build up is allowed to vent out of the control rod through vent holes in the control rod.
Referring to Figures 1 and 2, there is shown turbocharger apparatus 1 comprising a turbine housing 4 with a control rod 5 in a bush 8 with an exhaust gas return pipe 3. Also shown is a groove 7 in the control rod 5, with a control lever 10.
Figure 2 shows the turbine housing 4 with the control rod 5 in a bush 9. A groove 12 is in the bush 9, and not in the control rod 5. Also shown in Figure 2 is an exhaust gas return pipe 3, and a control lever 10 with a control unit 21.
When exhaust gases are passing through the turbine housing 4, the gases are under pressure. Some of the exhaust gases leak passed the control rod 5. In order to prevent the gases leaking past the end 22 of the control rod 5 and bushes 8, 9, a groove is provided in the control rod 5 and/or in the bush 9. When leaking exhaust gases enter into the groove 7 or the groove 12, the gases are then taken from the groove 7 or the groove 12 under vacuum into the return pipe 3. The return pipe 3 is under vacuum from an engine system (not shown) or the compressor of the turbocharger apparatus (not shown). The arrangement prevents gas leakage passing the end 22 of the control rod 5. Figures 1 and 2 show a system for a control rod that rotates.
Referring now to Figures 3 - 6, there is shown in Figure 3 turbocharger apparatus 2 with a control system whereby the control rod 5 slides along the bush 9. The control system has the groove 12 and the return pipe 3. Also shown in Figure 3 is a seal 31 for helping to prevent exhaust gas leakage past the control rod 5 and the bush 9.
Figure 3 also shows a compressor housing 28, and a bearing assembly 108 with clamps 27 that hold the bearing assembly 108 and the turbine housing 4 together.
Figure 4 shows the control rod system used in the turbocharger apparatus 2. The control rod is shown in the closed position. Also shown is an air gap 45 so that air may pass to help cool the control rod 5.
Figure 5 shows the control rod in the fully open position, with a seal 31 stopping before the vacuum groove 12.
Figure 6 shows a groove 17 in the control rod 5.
Figure 7 shows an arrangement that helps to prevent heat transfer along the control rod 5. More specifically, vent holes 27 may be provided in the control rod 5. The vacuum in the pipe 3 is also used to help cool the control rod 5 and a bush 9, when air is taken into a gap 45 of the bush 9 and the control rod 5. This allows for a control unit to be mounted closer to the turbine housing 4 than would otherwise be the case.
Figure 8 shows how the vent holes 27 allow heat to pass from the control rod 5.
It is to be appreciated that the embodiments of the invention described above with reference to the accompanying drawings have been given by way of example only and that modifications may be effected.

Claims (12)

1. Turbocharger apparatus comprising a housing, a compressor mounted for rotation in the housing, a turbine mounted for rotation in the housing, a first inlet for enabling air to be conducted to the compressor, an outlet for enabling air from the compressor to be conducted to an engine, a second inlet for enabling exhaust gases from the engine to be conducted to the turbine in order to rotate the turbine, a chamber which surrounds the turbine and which receives the exhaust gases from the second inlet before the exhaust gases are conducted to the turbine, a bearing assembly for permitting the rotation of the turbine, and a control system for controlling the speed of the turbine, the control system having an exhaust gas recirculation system for preventing exhaust gas leakage from the turbocharger apparatus.
2. Turbocharger apparatus according to claim 1 in which the control system includes a control rod, and in which the exhaust gases that leak past the control rod enter into a vacuum groove from where the gases are able to be taken under vacuum back into an engine system and thereby to prevent gas leakage from the turbocharger apparatus.
3. Turbocharger apparatus according to claim 2 in which the vacuum groove is in the control rod.
4. Turbocharger apparatus according to claim 2 or claim 3 and including a bush for the control rod.
5. Turbocharger apparatus according to claim 4 in which the vacuum groove is in the bush for the control rod.
6. Turbocharger apparatus according to claim 4 or claim 5 in which the control system includes a gas recirculation pipe, and in which the gas recirculation pipe is mounted in the bush for the control rod.
7. Turbocharger apparatus according to any one of the preceding claims and including a control rod that rotates during use of the turbocharger apparatus, the control rod being such that it allows the gas recirculation.
8. Turbocharger apparatus according to any one of claims 1 - 6 and including a control rod that moves with a linear movement during use of the turbocharger apparatus, the control rod being such that it allows gas recirculation.
9. Turbocharger apparatus according to any one of claims 2 - 8 and including a gas recirculation system that allows cooling air under vacuum to cool the control rod and the bush for the control rod.
10. Turbocharger apparatus having a control rod system that allows cooling air to pass through vent holes in the control rod.
11. Turbocharger apparatus according to claim 10 and comprising a housing, a compressor mounted for rotation in the housing, a turbine mounted for rotation in the housing, a first inlet for enabling air to be conducted to the compressor, an outlet for enabling air from the compressor to be conducted to an engine, a second inlet for enabling exhaust gases from the engine to be conducted to the turbine in order to rotate the turbine, a chamber which surrounds the turbine and which receives the exhaust gases from the second inlet before the exhaust gases are conducted to the turbine, and a bearing assembly for permitting the rotation of the turbine.
12. Turbocharger apparatus substantially as herein described with reference to the accompanying drawings.
GB0311127A 2003-05-14 2003-05-14 Turbocharger apparatus having an exhaust gas recirculating system for preventing gas leakage from the turbocharger apparatus Expired - Fee Related GB2401652B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0311127A GB2401652B (en) 2003-05-14 2003-05-14 Turbocharger apparatus having an exhaust gas recirculating system for preventing gas leakage from the turbocharger apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0311127A GB2401652B (en) 2003-05-14 2003-05-14 Turbocharger apparatus having an exhaust gas recirculating system for preventing gas leakage from the turbocharger apparatus

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GB0311127D0 GB0311127D0 (en) 2003-06-18
GB2401652A true GB2401652A (en) 2004-11-17
GB2401652B GB2401652B (en) 2006-05-03

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006128616A1 (en) * 2005-06-02 2006-12-07 Borgwarner Inc. Adjusting shaft arrangement of a turbocharger
US8579579B2 (en) 2009-11-10 2013-11-12 Honeywell International Inc. Sealed shaft assembly for exhaust turbines
US20140298800A1 (en) * 2013-04-04 2014-10-09 Ford Global Technologies, Llc Exhaust leakage management
US9032727B2 (en) 2012-11-28 2015-05-19 Honeywell International Inc. Suction sealing for turbocharger
WO2020074917A1 (en) * 2018-10-12 2020-04-16 Cummins Ltd Turbine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9683483B1 (en) * 2016-03-17 2017-06-20 Ford Global Technologies, Llc Exhaust leakage management

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659295A (en) * 1984-04-20 1987-04-21 The Garrett Corporation Gas seal vanes of variable nozzle turbine
US5868553A (en) * 1996-05-08 1999-02-09 Asea Brown Boveri Ag Exhaust gas turbine of an exhaust gas turbocharger
US6371722B1 (en) * 1999-03-11 2002-04-16 Ishikawajima-Harima Heavy Industries Co., Ltd. Gas sealing apparatus for variable capacity supercharger
WO2003023194A1 (en) * 2001-09-10 2003-03-20 Malcolm George Leavesley Turbocharger apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659295A (en) * 1984-04-20 1987-04-21 The Garrett Corporation Gas seal vanes of variable nozzle turbine
US5868553A (en) * 1996-05-08 1999-02-09 Asea Brown Boveri Ag Exhaust gas turbine of an exhaust gas turbocharger
US6371722B1 (en) * 1999-03-11 2002-04-16 Ishikawajima-Harima Heavy Industries Co., Ltd. Gas sealing apparatus for variable capacity supercharger
WO2003023194A1 (en) * 2001-09-10 2003-03-20 Malcolm George Leavesley Turbocharger apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006128616A1 (en) * 2005-06-02 2006-12-07 Borgwarner Inc. Adjusting shaft arrangement of a turbocharger
CN101189412B (en) * 2005-06-02 2010-06-23 博格华纳公司 Adjusting shaft arrangement of a turbocharger
US8172513B2 (en) 2005-06-02 2012-05-08 Borgwarner Inc. Adjusting shaft arrangement of a turbocharger
US8579579B2 (en) 2009-11-10 2013-11-12 Honeywell International Inc. Sealed shaft assembly for exhaust turbines
US9032727B2 (en) 2012-11-28 2015-05-19 Honeywell International Inc. Suction sealing for turbocharger
EP2738369A3 (en) * 2012-11-28 2017-12-27 Honeywell International Inc. Suction sealing for turbocharger
US20140298800A1 (en) * 2013-04-04 2014-10-09 Ford Global Technologies, Llc Exhaust leakage management
US9103271B2 (en) * 2013-04-04 2015-08-11 Ford Global Technologies, Llc Exhaust leakage management
WO2020074917A1 (en) * 2018-10-12 2020-04-16 Cummins Ltd Turbine
US20210355863A1 (en) * 2018-10-12 2021-11-18 Cummins Ltd Turbine
US11598251B2 (en) * 2018-10-12 2023-03-07 Cummins Ltd Turbine wastegate having a fluidic sealing arrangement and a method of testing thereof

Also Published As

Publication number Publication date
GB0311127D0 (en) 2003-06-18
GB2401652B (en) 2006-05-03

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20220514