EP0028035A1 - Moteur à combustion interne suralimenté par un échangeur de pression dynamique à ondes - Google Patents

Moteur à combustion interne suralimenté par un échangeur de pression dynamique à ondes Download PDF

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Publication number
EP0028035A1
EP0028035A1 EP80200783A EP80200783A EP0028035A1 EP 0028035 A1 EP0028035 A1 EP 0028035A1 EP 80200783 A EP80200783 A EP 80200783A EP 80200783 A EP80200783 A EP 80200783A EP 0028035 A1 EP0028035 A1 EP 0028035A1
Authority
EP
European Patent Office
Prior art keywords
air
pressure
wave machine
pressure wave
combustion engine
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.)
Withdrawn
Application number
EP80200783A
Other languages
German (de)
English (en)
Inventor
Peter Dörfler
Hubert Kirchhofer
Andreas Mayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0028035A1 publication Critical patent/EP0028035A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F13/00—Pressure exchangers
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/42—Engines with pumps other than of reciprocating-piston type with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers

Definitions

  • the present invention relates to an internal combustion engine charged by means of a gas dynamic pressure wave machine, the pressure wave machine consisting essentially of a cell rotor and a housing formed from a central part and a side part on the air side and one on the gas side.
  • Exhaust gas turbochargers of various designs and outputs are used almost exclusively to charge internal combustion engines and to increase the effective medium pressure.
  • gas-dynamic pressure wave machines provided by external drive and partially self-propelled can also be used, which are distinguished by their quick response, particularly in the case of load changes, as are particularly common in vehicle diesel engines,
  • a disadvantage of such an arrangement is that the exhaust gas from the engine. driven turbochargers can only follow the load changes of the engine with a delay which is dependent on the inertia of the turbocharger rotors, on the charging method and on the individual operating ranges, as a result of which the engine's response behavior suffers.
  • the air-side side part of the pressure wave machine is provided with an additional opening, which is located in the circumferential direction of the cellular wheel between the low-pressure inlet and the high-pressure outlet and is introduced into the rotor cells via the precompressed additional air.
  • Such an opening in the air-side part is known (CH-PS 552 125, Fig. 7), a small amount of exhaust gas being introduced into the air side of the cell rotor through this opening, but this is intended to achieve a reduction in pollutants, while according to supply of pre-compressed air according to the invention the boost pressure ratio is to be changed.
  • the proportion of the additional air is about 25% of the amount of charge air.
  • the highest possible proportion of additional air in the pressure wave machine also acts as purge air and ensures that the cellular wheel is flushed well, so that no proportion of exhaust gases can get into the charge air. Due to this flushing of the pressure wave machine, the starting behavior is improved and a starting valve previously required is no longer required.
  • a further pressure wave machine can be connected in parallel to the first pressure wave machine on the exhaust side.
  • an exhaust gas turbocharger can also be connected in parallel to the pressure wave machine on the exhaust side.
  • the turbocharger Since the exhaust gas turbocharger is only connected in parallel to the pressure wave machine on the exhaust gas side, the disadvantage of the exhaust gas turbocharger with regard to the response behavior, i.e. The inertia of the turbocharger does not have as much of an impact as the main exhaust gas flow of the pressure wave machine and only part of the exhaust gas, i.e. about 25% of the turbine of the exhaust gas turbocharger are fed. Therefore, the turbocharger can also be made significantly smaller than in the known series connection.
  • a compressor that is driven independently of the exhaust gas can also be provided for the pre-compression of the additional air.
  • the pressure wave machine receives the full amount of exhaust gas on the exhaust side and, on the air side, in addition to the normally sucked-in fresh air, a predeterminable amount of pre-compressed air which is independent of the exhaust gas amount and which is dependent on the design of the additional compressor.
  • the compressor can be driven mechanically by the motor as well as by an external drive, for example an electric motor or a hydraulic motor, the speed of the compressor in any case being dependent on the motor speed and the motor load.
  • the additional opening in the air-side part is dimensioned so wide that it corresponds to at least two pressure wave transit times (a, b).
  • This configuration of the additional opening in the air-side part means that the cell at the closing end of the pre-compression opening is only closed when the reflection wave b has reached the air-side part, as a result of which the pressure wave process is precisely coordinated.
  • the characters 1 for low pressure, 2 for high pressure, and v for the entry and n for the exit into and from the cellular wheel of the pressure wave machine, and VK for precompression stand for the designation of the boundary condition curves.
  • the numbers 30 - 38 indicate the states in the cell wheel of the pressure wave machine, as well as in the pressure-speed diagram.
  • 10 denotes an internal combustion engine with an air supply line 11 and an exhaust gas line 12.
  • a branch 13 is arranged in the exhaust gas line 12, via which a part of the exhaust gases is applied to a first pressure wave machine 14, which consists of a cell rotor 26 and a housing formed from a central part 27, as well as an air-side 28 and an exhaust-side part 29 at 2 v flow into the side part 29 of the pressure wave machine 14.
  • a smaller part, that is to say about 25% of the exhaust gas quantity mentioned, is fed to a second pressure wave machine 15 which is designed analogously to the first pressure wave machine 14. Both pressure wave machines 14, 15 are accordingly connected in parallel on the exhaust side.
  • the additional opening VK in the air-side part 28 is arranged in the circumferential direction between the low-pressure inlet 1 v and the high-pressure outlet 2 n, as can be seen from FIG. 3.
  • the compressed combustion air passes from the pressure wave machine 14 via a further line 19 and a charge air cooler 20 into the air supply line 11 and thus into the internal combustion engine 10.
  • the internal combustion engine is again designated by 10, the exhaust gases of which are predominantly supplied via the exhaust line 12 and the branch 13, namely approximately 75% at 2 v of the pressure wave machine 14, while approximately 25% of the total exhaust gas quantity are fed to the turbine 21 of an exhaust gas turbocharger 22.
  • the turbine 21 drives a compressor 24, in which air sucked in via the air intake line 17 is pre-compressed and fed to the pressure wave machine 14 via line 18 at VK.
  • the pressure wave machine 14 receives fresh air to be compressed via the air intake line 17 '.
  • the air compressed in the pressure wave machine 14 leaves it at 2 n and reaches the internal combustion engine 10 via the line 19 and the charging air cooler 20 through the air supply line 11.
  • the relaxed exhaust gases leave the pressure wave machine 14 at 1 n and the turbine 21 via the Exhaust pipe 16.
  • FIG. 3 shows the development of a cylindrical section through the rotor of the pressure wave machine 14, or a path-time diagram
  • FIG. 4 shows the associated pressure-speed diagram, as is usually used in the characteristic methods of the transient gas dynamics , represents.
  • FIG. 4 shows the state in the course of the gas dynamic process in the pressure wave machine 14, characterized on the one hand by the pressure ratio and on the other hand by the flow velocity U. related to the speed of sound, with A the modified pressure ratio ) , P the pressure prevailing in the cell rotor, P being a freely selectable reference pressure, while ⁇ representing the isentropic exponent.
  • the state points at the intersection of two characteristics are numbered consecutively, the fields in which this state prevails in FIG. 3 being designated with the same numbers.
  • the rotor rotates in the direction of arrow 25 between the two side parts 28, 29 of the pressure wave machine 14. In the low-pressure zone, the cell rotor 26 is fed with fresh air from the low-pressure inlet opening 1 v.
  • a compression wave between fields 38 and 30 slows the flow rate to zero.
  • a compression wave a arises which pre-compresses the cell contents to the state 31.
  • the pressure wave a is from the gas side part 29 reflected as a pressure wave b. Additional air flows into the cell from the pre-compression opening VK. It follows that, for the correct coordination of the pressure wave process, the width in the circumferential direction of the inlet openings VK is dimensioned approximately so that it corresponds to two pressure wave transit times (a, b).
  • the boundary condition curve 1 v characterizes the inflow of the low pressure air, 1 n the outflow of the low pressure gas, 2 v the inflow of the high pressure gas, 2 n the outflow of the high pressure air and VK the inflow of the additional air.
  • the state diagram of the characteristics shown in the drawing would be en + - .., ie the high pressure level would be at states 32 ', 33'.
  • the pre-compression is about 45% of the total pressure ratio with an additional air volume of about 25% of the charge air volume.
  • a compressor (not shown) that is driven in an exhaust-gas-independent manner to generate precompressed additional air for the pressure wave machine 14.
  • a compressor can be driven with an appropriate gear ratio by the crankshaft of the internal combustion engine 1, electrically or by means of a hydraulic drive.
  • the expanded exhaust gases of the pressure wave machine 14 are discharged directly via the exhaust line 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
EP80200783A 1979-10-25 1980-08-21 Moteur à combustion interne suralimenté par un échangeur de pression dynamique à ondes Withdrawn EP0028035A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH957579 1979-10-25
CH9575/79 1979-10-25

Publications (1)

Publication Number Publication Date
EP0028035A1 true EP0028035A1 (fr) 1981-05-06

Family

ID=4353422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200783A Withdrawn EP0028035A1 (fr) 1979-10-25 1980-08-21 Moteur à combustion interne suralimenté par un échangeur de pression dynamique à ondes

Country Status (4)

Country Link
EP (1) EP0028035A1 (fr)
JP (1) JPS5666420A (fr)
DE (1) DE2948859A1 (fr)
DK (1) DK452780A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157347A1 (fr) * 1984-03-27 1985-10-09 Mazda Motor Corporation Système d'aspiration de moteur avec compresseur à suralimentation
WO1997020134A1 (fr) * 1995-11-30 1997-06-05 Otto Blank Dispositif de suralimentation en air d'un moteur a combustion interne
FR2899938A1 (fr) * 2006-04-12 2007-10-19 Renault Sas Moteur comportant un compresseur a ondes de pression pour une gestion simultanee du taux de recirculation de gaz d'echappement et d'une pression de suralimentation
FR2905980A1 (fr) * 2006-09-20 2008-03-21 Renault Sas "groupe motopropulseur, en particulier pour vehicule automobile, ainsi que circuit et procede de suralimentation de son moteur"
WO2011032534A1 (fr) * 2009-09-15 2011-03-24 Benteler Automobiltechnik Gmbh Machine à ondes de pression gazodynamique
US20120192558A1 (en) * 2009-10-06 2012-08-02 Toyota Jidosha Kabushiki Kaisha Supercharging system for internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301912A (de) * 1951-05-16 1954-09-30 Jendrassik George Druckaustauscher.
CH315430A (de) * 1953-07-29 1956-08-15 Bbc Brown Boveri & Cie Drucktransformer, insbesondere für Gasturbinenanlagen
GB798119A (en) * 1953-07-29 1958-07-16 Bbc Brown Boveri & Cie Improvements in or relating to pressure devices
CH371633A (de) * 1958-10-08 1963-08-31 Bbc Brown Boveri & Cie Umsteuerbare mehrzylindrige Zweitakt-Brennkraftmaschine mit mindestens einem Abgasturbolader
CH552135A (de) * 1972-11-29 1974-07-31 Bbc Brown Boveri & Cie Verfahren zur verminderung der schadstoffemission von verbrennungsmotoren und einrichtung zur durchfuehrung des verfahrens.
CH593421A5 (fr) * 1976-06-29 1977-11-30 Bbc Brown Boveri & Cie

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH347381A (de) * 1957-02-27 1960-06-30 Ite Circuit Breaker Ltd Brennkraftmaschine mit mindestens einem als Aufladegruppe wirkenden Drucktransformer
DE1060085B (de) * 1957-08-29 1959-06-25 Dudley Brian Spalding Druckaustauscher
GB895808A (en) * 1960-03-11 1962-05-09 Power Jets Res & Dev Ltd Improvements in or relating to supercharging reciprocating internal-combustion engines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301912A (de) * 1951-05-16 1954-09-30 Jendrassik George Druckaustauscher.
CH315430A (de) * 1953-07-29 1956-08-15 Bbc Brown Boveri & Cie Drucktransformer, insbesondere für Gasturbinenanlagen
GB798119A (en) * 1953-07-29 1958-07-16 Bbc Brown Boveri & Cie Improvements in or relating to pressure devices
CH371633A (de) * 1958-10-08 1963-08-31 Bbc Brown Boveri & Cie Umsteuerbare mehrzylindrige Zweitakt-Brennkraftmaschine mit mindestens einem Abgasturbolader
CH552135A (de) * 1972-11-29 1974-07-31 Bbc Brown Boveri & Cie Verfahren zur verminderung der schadstoffemission von verbrennungsmotoren und einrichtung zur durchfuehrung des verfahrens.
FR2215092A5 (fr) * 1972-11-29 1974-08-19 Bbc Brown Boveri & Cie
CH593421A5 (fr) * 1976-06-29 1977-11-30 Bbc Brown Boveri & Cie
DE2633568A1 (de) * 1976-06-29 1978-01-05 Bbc Brown Boveri & Cie Einrichtung zur hochaufladung eines verbrennungsmotors

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157347A1 (fr) * 1984-03-27 1985-10-09 Mazda Motor Corporation Système d'aspiration de moteur avec compresseur à suralimentation
WO1997020134A1 (fr) * 1995-11-30 1997-06-05 Otto Blank Dispositif de suralimentation en air d'un moteur a combustion interne
US6158422A (en) * 1995-11-30 2000-12-12 Blank; Otto Supercharging arrangement for the charge air of an internal combustion engine
FR2899938A1 (fr) * 2006-04-12 2007-10-19 Renault Sas Moteur comportant un compresseur a ondes de pression pour une gestion simultanee du taux de recirculation de gaz d'echappement et d'une pression de suralimentation
FR2905980A1 (fr) * 2006-09-20 2008-03-21 Renault Sas "groupe motopropulseur, en particulier pour vehicule automobile, ainsi que circuit et procede de suralimentation de son moteur"
WO2011032534A1 (fr) * 2009-09-15 2011-03-24 Benteler Automobiltechnik Gmbh Machine à ondes de pression gazodynamique
RU2496029C2 (ru) * 2009-09-15 2013-10-20 Бентелер Аутомобильтекник Гмбх Газодинамический волновой обменник давления
US20120192558A1 (en) * 2009-10-06 2012-08-02 Toyota Jidosha Kabushiki Kaisha Supercharging system for internal combustion engine

Also Published As

Publication number Publication date
DE2948859A1 (de) 1981-05-07
DK452780A (da) 1981-04-26
JPS5666420A (en) 1981-06-04

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR IT NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BBC AKTIENGESELLSCHAFT BROWN, BOVERI & CIE.

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18D Application deemed to be withdrawn

Effective date: 19820412

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Inventor name: KIRCHHOFER, HUBERT

Inventor name: MAYER, ANDREAS

Inventor name: DOERFLER, PETER