WO2010005805A2 - Multi-stage supercharging device of an internal combustion engine - Google Patents

Multi-stage supercharging device of an internal combustion engine Download PDF

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Publication number
WO2010005805A2
WO2010005805A2 PCT/US2009/048771 US2009048771W WO2010005805A2 WO 2010005805 A2 WO2010005805 A2 WO 2010005805A2 US 2009048771 W US2009048771 W US 2009048771W WO 2010005805 A2 WO2010005805 A2 WO 2010005805A2
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
exhaust
low
gas
supercharging device
Prior art date
Application number
PCT/US2009/048771
Other languages
French (fr)
Other versions
WO2010005805A3 (en
Inventor
Werner Eissler
Frank Schmitt
Original Assignee
Borgwarner Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Borgwarner Inc. filed Critical Borgwarner Inc.
Publication of WO2010005805A2 publication Critical patent/WO2010005805A2/en
Publication of WO2010005805A3 publication Critical patent/WO2010005805A3/en

Links

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
    • F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
    • 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
    • F02B37/001—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel
    • 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
    • F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
    • 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
    • F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
    • 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
    • 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
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • 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

Definitions

  • the invention relates to a multi-stage supercharging device of an internal combustion engine such as, in particular, a gasoline or diesel engine.
  • Multi-stage supercharging devices have at least one high-pressure stage and at least one low-pressure stage.
  • the exhaust gases of the internal combustion engine firstly flow into the turbine of the high-pressure stage and subsequently pass into the turbine of the low-pressure stage.
  • the low-pressure exhaust-gas t ⁇ rbocharg ⁇ r is generally geometrically very much larger, that is to say in particular the wheel diameters of the compressor and turbine are significantly greater than those of the high-pressure exhaust-gas turbocharger.
  • the resulting high mass moment of inertia results in problems in the transient behavior (acceleration) of the low-pressure exhaust-gas turbocharger.
  • the low-pressure stage is divided into two low-pressure exhaust-gas turbochargers that are connected in parallel, it is possible instead of the previous single large low-pressure exhaust-gas turbocharger to use tw r o small exhaust-gas turbochargers corresponding to the size of the high-pressure exhaust-gas turbocharger, which two small exhaust-gas turbochargers, on account of the relatively low mass moment of inertia, are designed for fast acceleration.
  • This has the result, in the transient range, that is to say during acceleration, of a significantly improved response behavior of the entire supercharging device according to the invention.
  • the design according to the invention also has packaging advantages, since the low-pressure stage exhaust-gas turbocharger with large external dimensions that was used previously is replaced by two smaller exhaust-gas turbochargers that can be located more effectively.
  • the subclaims relate to advantageous refinements of the invention. Further details, advantages and features of the invention can be gathered from the following description of exemplary embodiments on the basis of the drawing, in which:
  • Figure 1 shows a schematically highly simplified block diagram of a first embodiment of the supercharging device according to the invention.
  • Figure 2 shows an illustration, corresponding to Figure 1 , of a second embodiment.
  • Figure 1 illustrates a first embodiment of a multi-stage supercharging device 1 of an internal combustion engine VM that may be embodied as a spark- ignition or diesel engine.
  • the supercharging device 1 has a high-pressure stage 2 with a high- pressure turbocharger 3 that may have a conventional design.
  • the turbine 3a of the high-pressure turbocharger 3 is correspondingly arranged in an exhaust-gas line 11 of the internal combustion engine VM.
  • the compressor 3b of the high-pressure exhaust-gas turbocharger 3 is arranged in a charge-air line 21.
  • the high- pressure stage may also have a turbine bypass 16 with a bypass line 16a and a regulating valve 16b, while the compressor 3b may be provided with a corresponding bypass 14 with a bypass line 14a and a regulating valve 14b, as can be seen in detail from the diagrammatic illustration of Figure 1.
  • a cooling device 15 for the compressed air may be provided in the charge-air line 21 downstream of the compressor 3b in the flow direction L of the inducted air.
  • the supercharging device 1 also has a low-pressure stage 4 which, according to the invention, is composed of two small exhaust-gas turbochargers 5 and 6 each with a mass moment of inertia that is preferably approximately the same as that of the exhaust-gas turbocharger 3 of the high-pressure stage 2.
  • the exhaust-gas line 11 is divided into two parallel line sections 12 and 13 in which are arranged, respectively, the turbines 5a and 6a of the turbochargers 5 and 6.
  • one bypass 7 and 8 respectively may be assigned to the line sections 12 and 13.
  • the associated compressors 5b and 6b are arranged in parallel intake lines
  • the embodiment according to Figure 1 is also characterized by a high- pressure exhaust-gas recirculation device 9 that comprises an exhaust-gas recirculation line 20 that leads from the exhaust-gas side to the intake side of the internal combustion engine VM and, for this purpose, has an exhaust-gas recirculation line 20 in which a cooling device 18 and a regulating valve 19 are arranged.
  • Figure 2 shows a second embodiment of the multi-stage supercharging device 1 according to the present invention. All the parts corresponding to the embodiment according to Figure 1 are provided with the same reference symbols, such that with regard to the design and mode of operation, reference can be made to the preceding description.
  • the embodiment of Figure 2 has a low-pressure exhaust-gas recirculation device 10 that branches off from the line section 12 downstream of a particle filter 24 in the flow direction A of the exhaust gases, for which purpose a branch line 27 is provided in which a cooling device 25 and a regulating valve 26 are provided.
  • the branch line 27 opens out into the intake line 22, specifically upstream, as viewed in the flow direction L of the intake air, of the branching point of the intake air line 23 in which the compressor 6b of the exhaust-gas turbocharger 6 is arranged.
  • High-pressure exhaust-gas recirculation device 0 Low-pressure exhaust-gas recirculation device 1 Exhaust-gas line 2, 13 Parallel line sections of the exhaust-gas line 11 4 Bypass of the compressor 3b of the exhaust- gas turbocharger 34a Bypass line 4b Regulating valve 5 Cooling device 6 Bypass of the turbine 3a of the exhaust-gas turbocharger 36a Bypass line 6b Regulating valve 7 — 8 Cooling device 19 Regulating valve

Landscapes

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

Abstract

The invention relates to a multi-stage supercharging device (1) of an internal combustion engine (VM), having a high-pressure stage (2) that has a high-pressure turbocharger (3); and having a low-pressure stage (4) that, as viewed in the exhaust-gas flow direction (A), is provided downstream of the high-pressure stage (2), wherein the low-pressure stage (4) has two low-pressure turbocharger's (5, 6) that are connected in parallel with one another.

Description

MULTI-STAGE SUPERCHARGING DEVICE OF AN INTERNAL COMBUSTION ENGINE
DESCRIPTION The invention relates to a multi-stage supercharging device of an internal combustion engine such as, in particular, a gasoline or diesel engine.
Multi-stage supercharging devices have at least one high-pressure stage and at least one low-pressure stage. In systems of said type, when a bypass is closed or not provided, the exhaust gases of the internal combustion engine firstly flow into the turbine of the high-pressure stage and subsequently pass into the turbine of the low-pressure stage.
The low-pressure exhaust-gas tυrbochargεr is generally geometrically very much larger, that is to say in particular the wheel diameters of the compressor and turbine are significantly greater than those of the high-pressure exhaust-gas turbocharger. The resulting high mass moment of inertia results in problems in the transient behavior (acceleration) of the low-pressure exhaust-gas turbocharger.
It is therefore an object of the present invention to create a multi-stage supercharging device as per the preamble of Claim 1 in which the response behavior of the low-pressure stage in the transient range can be improved. Said object is achieved by means of the features of Claim 1.
Since, according to the invention, the low-pressure stage is divided into two low-pressure exhaust-gas turbochargers that are connected in parallel, it is possible instead of the previous single large low-pressure exhaust-gas turbocharger to use twro small exhaust-gas turbochargers corresponding to the size of the high-pressure exhaust-gas turbocharger, which two small exhaust-gas turbochargers, on account of the relatively low mass moment of inertia, are designed for fast acceleration. This has the result, in the transient range, that is to say during acceleration, of a significantly improved response behavior of the entire supercharging device according to the invention. In addition to said improved transient behavior, the design according to the invention also has packaging advantages, since the low-pressure stage exhaust-gas turbocharger with large external dimensions that was used previously is replaced by two smaller exhaust-gas turbochargers that can be located more effectively. The subclaims relate to advantageous refinements of the invention. Further details, advantages and features of the invention can be gathered from the following description of exemplary embodiments on the basis of the drawing, in which:
Figure 1 shows a schematically highly simplified block diagram of a first embodiment of the supercharging device according to the invention, and
Figure 2 shows an illustration, corresponding to Figure 1 , of a second embodiment.
Figure 1 illustrates a first embodiment of a multi-stage supercharging device 1 of an internal combustion engine VM that may be embodied as a spark- ignition or diesel engine.
The supercharging device 1 has a high-pressure stage 2 with a high- pressure turbocharger 3 that may have a conventional design. The turbine 3a of the high-pressure turbocharger 3 is correspondingly arranged in an exhaust-gas line 11 of the internal combustion engine VM. The compressor 3b of the high-pressure exhaust-gas turbocharger 3 is arranged in a charge-air line 21. Flere, the high- pressure stage may also have a turbine bypass 16 with a bypass line 16a and a regulating valve 16b, while the compressor 3b may be provided with a corresponding bypass 14 with a bypass line 14a and a regulating valve 14b, as can be seen in detail from the diagrammatic illustration of Figure 1. Furthermore, a cooling device 15 for the compressed air may be provided in the charge-air line 21 downstream of the compressor 3b in the flow direction L of the inducted air.
The supercharging device 1 also has a low-pressure stage 4 which, according to the invention, is composed of two small exhaust-gas turbochargers 5 and 6 each with a mass moment of inertia that is preferably approximately the same as that of the exhaust-gas turbocharger 3 of the high-pressure stage 2.
Here, the exhaust-gas line 11 is divided into two parallel line sections 12 and 13 in which are arranged, respectively, the turbines 5a and 6a of the turbochargers 5 and 6. In each case one bypass 7 and 8 respectively may be assigned to the line sections 12 and 13. The associated compressors 5b and 6b are arranged in parallel intake lines
22 and 23 respectively, which intake lines 22 and 23 open out into the intake line 21 upstream of the compressor 3b in the flow direction L, as can be seen in detail from Figure 1. The embodiment according to Figure 1 is also characterized by a high- pressure exhaust-gas recirculation device 9 that comprises an exhaust-gas recirculation line 20 that leads from the exhaust-gas side to the intake side of the internal combustion engine VM and, for this purpose, has an exhaust-gas recirculation line 20 in which a cooling device 18 and a regulating valve 19 are arranged.
Figure 2 shows a second embodiment of the multi-stage supercharging device 1 according to the present invention. All the parts corresponding to the embodiment according to Figure 1 are provided with the same reference symbols, such that with regard to the design and mode of operation, reference can be made to the preceding description.
In contrast to the embodiment according to Figure 1, the embodiment of Figure 2 has a low-pressure exhaust-gas recirculation device 10 that branches off from the line section 12 downstream of a particle filter 24 in the flow direction A of the exhaust gases, for which purpose a branch line 27 is provided in which a cooling device 25 and a regulating valve 26 are provided. The branch line 27 opens out into the intake line 22, specifically upstream, as viewed in the flow direction L of the intake air, of the branching point of the intake air line 23 in which the compressor 6b of the exhaust-gas turbocharger 6 is arranged. In addition to the written disclosure of the invention above, reference is hereby explicitly made to the diagrammatic illustion in Figures 1 and 2.
List of reference symbols
Supercharging device
High-pressure stage
High-pressure turbocharger a Turbine b Compressor
Low-pressure stage
First low-pressure exhaust-gas turbocharger a Turbine b Compressor
Second low-pressure exhaust-gas turbocharger a Turbine b Compressor
Bypass of the exhaust-gas turbocharger 5 a Bypass line b Regulating valve
Bypass of the exhaust-gas turbocharger 6 a Bypass line b Regulating valve
High-pressure exhaust-gas recirculation device 0 Low-pressure exhaust-gas recirculation device 1 Exhaust-gas line 2, 13 Parallel line sections of the exhaust-gas line 11 4 Bypass of the compressor 3b of the exhaust- gas turbocharger 34a Bypass line 4b Regulating valve 5 Cooling device 6 Bypass of the turbine 3a of the exhaust-gas turbocharger 36a Bypass line 6b Regulating valve 7 — 8 Cooling device 19 Regulating valve
20 Exhaust-gas recirculation line
21 Charge-air line
22, 23 Line sections of the intake line 21 with compressors 5b and 6b respectively
24 Particle filter
25 Cooling device
26 Regulating valve
27 Low-pressure exhaust-gas recirculation line
VM Internal combustion engine
A Exhaust-gas flow direction
L Air flow direction

Claims

1. Multi-stage supercharging device (1) of an internal combustion engine (VM) - having a high-pressure stage (2) that has a high-pressure turbochaiger (3); and having a low-pressure stage (4) that, as viewed in the exhaust-gas flow direction (A), is provided downstream of the high-pressure stage (2), characterized in that - the low-pressure stage (4) has two low-pressure turbochargers (5, 6) that are connected in parallel with one another.
2. Supercharging device according to Claim 1, characterized in that the low-pressure exhaust-gas turbochargers (5, 6) have approximately the same mass moment of inertia as the high-pressure exhaust-gas turbocharger (3).
3. Supercharging device according to Claim 1 or 2, characterized in that the low-pressure exhaust-gas turbochargers (5, 6) have approximately the same mass moment of inertia.
4. Supercharging device according to Claim 1 to 3, characterized in that the low-pressure exhaust-gas turbochargers (5, 6) have in each case one associated bypass (7 and 8 respectively).
5. Supercharging device according to one of Claims 1 to 4, characterized in that a high-pressure exhaust-gas recirculation device (9) is provided.
6. Supercharging device according to one of Claims 1 to 5, characterized in that a low-pressure exhaust-gas recirculation device (10) is provided.
PCT/US2009/048771 2008-07-07 2009-06-26 Multi-stage supercharging device of an internal combustion engine WO2010005805A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008031985.6 2008-07-07
DE102008031985 2008-07-07

Publications (2)

Publication Number Publication Date
WO2010005805A2 true WO2010005805A2 (en) 2010-01-14
WO2010005805A3 WO2010005805A3 (en) 2010-04-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011036083A1 (en) * 2009-09-22 2011-03-31 Abb Turbo Systems Ag Turbocompound system and components
DE102010010480A1 (en) * 2010-03-06 2011-09-08 Volkswagen Ag Internal combustion engine with two-stage supercharging
DE102010055059A1 (en) * 2010-12-17 2012-06-21 Audi Ag Device for charging of internal combustion engine of vehicle, has exhaust gas turbocharger provided with double-flow turbine, where exhaust gas turbocharger is designed for lower speed range of internal combustion engine
DE102011003001A1 (en) * 2011-01-21 2012-07-26 Abb Turbo Systems Ag turbine housing
US20140190164A1 (en) * 2013-01-07 2014-07-10 General Electric Company High pressure turbine inlet duct and engine
WO2016139009A1 (en) * 2015-03-02 2016-09-09 Bayerische Motoren Werke Aktiengesellschaft Two-stage exhaust-gas turbocharging device for an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828287A (en) * 1994-07-22 1996-01-30 Yanmar Diesel Engine Co Ltd Two-stage supercharged engine
EP0718481B1 (en) * 1994-12-24 2000-10-25 MAN Nutzfahrzeuge Aktiengesellschaft Exhaust gas recirculation deviced in a supercharged internal combustion engine
JP2007100628A (en) * 2005-10-06 2007-04-19 Isuzu Motors Ltd Egr system for two stage supercharged engine
JP2007263040A (en) * 2006-03-29 2007-10-11 Isuzu Motors Ltd Three stage supercharging system for engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828287A (en) * 1994-07-22 1996-01-30 Yanmar Diesel Engine Co Ltd Two-stage supercharged engine
EP0718481B1 (en) * 1994-12-24 2000-10-25 MAN Nutzfahrzeuge Aktiengesellschaft Exhaust gas recirculation deviced in a supercharged internal combustion engine
JP2007100628A (en) * 2005-10-06 2007-04-19 Isuzu Motors Ltd Egr system for two stage supercharged engine
JP2007263040A (en) * 2006-03-29 2007-10-11 Isuzu Motors Ltd Three stage supercharging system for engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011036083A1 (en) * 2009-09-22 2011-03-31 Abb Turbo Systems Ag Turbocompound system and components
DE102010010480A1 (en) * 2010-03-06 2011-09-08 Volkswagen Ag Internal combustion engine with two-stage supercharging
DE102010055059A1 (en) * 2010-12-17 2012-06-21 Audi Ag Device for charging of internal combustion engine of vehicle, has exhaust gas turbocharger provided with double-flow turbine, where exhaust gas turbocharger is designed for lower speed range of internal combustion engine
DE102011003001A1 (en) * 2011-01-21 2012-07-26 Abb Turbo Systems Ag turbine housing
US20140190164A1 (en) * 2013-01-07 2014-07-10 General Electric Company High pressure turbine inlet duct and engine
US9228488B2 (en) * 2013-01-07 2016-01-05 General Electric Company High pressure turbine inlet duct and engine
WO2016139009A1 (en) * 2015-03-02 2016-09-09 Bayerische Motoren Werke Aktiengesellschaft Two-stage exhaust-gas turbocharging device for an internal combustion engine
CN107002551A (en) * 2015-03-02 2017-08-01 宝马股份公司 Two-stage exhaust gas turbocharge device for internal combustion engine

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