WO1994024426A1 - Moteur a combustion interne suralimente - Google Patents

Moteur a combustion interne suralimente Download PDF

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Publication number
WO1994024426A1
WO1994024426A1 PCT/SE1994/000354 SE9400354W WO9424426A1 WO 1994024426 A1 WO1994024426 A1 WO 1994024426A1 SE 9400354 W SE9400354 W SE 9400354W WO 9424426 A1 WO9424426 A1 WO 9424426A1
Authority
WO
WIPO (PCT)
Prior art keywords
expander
supercharger
inlet
internal combustion
combustion engine
Prior art date
Application number
PCT/SE1994/000354
Other languages
English (en)
Inventor
Johnny Oscarsson
Original Assignee
Opcon Autorotor Ab
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 Opcon Autorotor Ab filed Critical Opcon Autorotor Ab
Publication of WO1994024426A1 publication Critical patent/WO1994024426A1/fr

Links

Classifications

    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
    • F02M31/08—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air the gases being exhaust gases
    • F02M31/0805—Pneumatic control of the amount of exhaust gas or combustion air directed to the heat exchange surfaces, e.g. as a function of the pressure in the air intake passage
    • 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
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F02B33/36—Engines with pumps other than of reciprocating-piston type with rotary pumps of positive-displacement type
    • 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
    • F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
    • F02B33/443—Heating of charging air, e.g. for facilitating the starting
    • 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
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/16—Other safety measures for, or other control of, pumps
    • 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
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
    • F02M31/08—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air the gases being exhaust gases
    • F02M31/087—Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages
    • F02M31/093—Air intake passage surrounding the exhaust gas passage; Exhaust gas passage surrounding the air intake passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0283—Throttle in the form of an expander
    • 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
    • F02M26/03—EGR systems specially adapted for supercharged engines with a single mechanically or electrically driven intake charge compressor
    • 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 present invention relates to a supercharged internal combustion engine comprising a supercharger of screw rotor type provided with an adjustable inlet port for capacity regulation and, thus, for regulating the expander function at part load, and equipped with a transmission connecting the supercharger/expander to the engine crankshaft.
  • a supercharged internal combustion engine of this type has the advantage of immediate response to throttle opening not only at high but also at low speed because the supercharger is efficient also at low speed and is always rotating in syncronism with the engine. At part load, when the supercharger is operated as an expander, a certain cooling of the air from the supercharger/expander is also obtained, which is advantageous to the engine.
  • the expander function is restricted, and a an improved expander function is desirable.
  • the object of the invention is to obtain such an improved expander function.
  • preheated air is fed to the supercharger working as an expander
  • the supercharger is fed with low density air.
  • the preheated air will be cooled at the expansion, and the pressure after the expander will be nearly equal to the pressure without preheating.
  • the expander efficiency is proportional to the volume flow and the pressure difference the preheating will result in an increased expander function.
  • a re-circulation circuit known per se for feeding a part of the exhaust gases via an EGR valve to the engine manifold can preferably be used by connecting the circuit to the inlet of the supercharger/expander thereby causing an increase of the volume flow and its temperature and, thus, an increased expander function.
  • the pipe known per se, for crankcase ventilation can preferably be connected to the inlet of the supercharger/expander. By selecting the connection point it is possible to choose a suitable pressure level.
  • the control of the valve for directing the inlet air to the supercharger/expander is, according to a preferred embodiment, effected by means of a pressure sensing device in the engine manifold such that the valve is positioned to direct the inlet air directly to the supercharger/expander when the sensed pressure is higher than 0.9 bar and to the bypass duct with the heat exchanger when the sensed pressure is lower than or equal to 0.9 bar.
  • Fig.l is a schematic plan view of the supercharged internal combustion engine and Fig.2 is a PV- diagram showing the improved expander function.
  • Fig.l discloses an internal combustion engine 1 comprising a manifold 2 and an exhaust pipe 3.
  • a screw rotor machine 4 driven by the engine crankshaft is connected to the manifold 2 and is operated as a combined supercharger and expander.
  • the supercharger/expander 4 has an inlet duct 5 provided with an air cleaner 6.
  • a bypass duct 7 is connected to the inlet duct
  • a valve 9 positioned in the inlet duct 5 as shown when the supercharger/expander is working as an expander, which is indicated by a pressure in the engine manifold 2 which is lower than or equal to 0.9 bar.
  • This pressure is sensed by a pressure sensing device 10 in the engine manifold 2, which by a line 11 is connected to the valve 9.
  • a signal is transmitted by the device 10 to the valve 9, which is switched over to the position shown by dash lines for directing the air directly to the supercharger/expander 4.
  • the air is preheated by the heat exchanger 8, and the expander is thus supplied with air having a lower density than usual.
  • the volume flow has been increased by increasing the inlet port to the supercharger/expander by a regulating means 18 operated by a gas pedal or foot throttle 19.
  • an intercooler 12 may preferably be integrated with the manifold 2.
  • a re-circulation circuit 15 including a so called EGR-valve 16 is arranged for re-circulation of a part of the exhaust gases to the engine inlet.
  • This circuit is not connected directly to the engine inlet but to the inlet of the supercharger/ expander 4. In this way the hot exhaust gases are utilized for increasing the expander function in a similar way as described here above in connection with the preheated inlet air.
  • a further improvement of the expander function has been obtained by utilizing a pipe 17 for the crankcase ventilation. Also this pipe is in fact connected to the inlet of the supercharger/expander so that the hot ventilation air with accompanying oil mist contributes to an increased expander function.
  • the PV-diagram in Fig.2 showes the area A-B-C-D which represents the work required when supercharging the engine at full load
  • the expander work at 0.6 bar sensed at the engine manifold is represented by the area A-E-G-H.
  • the increased expander work with preheated inlet air is represented by the area E-E,-G,-G.
  • the further increased expander work by utilizing the re-circulation circuit 15 is represented by the area E réelle-G.---G,-E, .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

Moteur à combustion interne suralimenté (1) comprenant un compresseur à suralimentation (4) du type à rotor à vis et pourvu d'une lumière d'admission réglable permettant de réguler la capacité et par conséquent de réguler la fonction d'expansion en régime de charge partielle. L'air arrivant au surcompresseur/expanseur est préchauffé par le tuyau d'échappement (3) du moteur lorsque le surcompresseur (4) agit comme expanseur afin d'augmenter la fonction d'expansion.
PCT/SE1994/000354 1993-04-21 1994-04-20 Moteur a combustion interne suralimente WO1994024426A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9301322A SE501252C2 (sv) 1993-04-21 1993-04-21 Överladdad förbränningsmotor
SE9301322-5 1993-04-21

Publications (1)

Publication Number Publication Date
WO1994024426A1 true WO1994024426A1 (fr) 1994-10-27

Family

ID=20389649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1994/000354 WO1994024426A1 (fr) 1993-04-21 1994-04-20 Moteur a combustion interne suralimente

Country Status (2)

Country Link
SE (1) SE501252C2 (fr)
WO (1) WO1994024426A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6414134B1 (en) 1988-12-22 2002-07-02 The Trustees Of The University Of Pennsylvania Regulation of bcl-2 gene expression
WO2012130369A1 (fr) * 2011-03-30 2012-10-04 Bayerische Motoren Werke Aktiengesellschaft Procédé pour faire fonctionner un moteur à combustion interne à débit régulé et moteur à combustion interne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3043584A1 (de) * 1979-12-06 1981-06-11 Hans Prof. Dipl.-Ing. Dr.Dr.h.c. Graz List Einspritz-brennkraftmaschine
US4802457A (en) * 1985-10-14 1989-02-07 Svenska Rotor Maskiner Ab Internal combustion engine provided with a supercharger
EP0326663A2 (fr) * 1988-02-02 1989-08-09 MAN Gutehoffnungshütte Aktiengesellschaft Machine à vis contrôlée par tiroir et moteur à combustion interne suralimenté qui en est muni

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3043584A1 (de) * 1979-12-06 1981-06-11 Hans Prof. Dipl.-Ing. Dr.Dr.h.c. Graz List Einspritz-brennkraftmaschine
US4802457A (en) * 1985-10-14 1989-02-07 Svenska Rotor Maskiner Ab Internal combustion engine provided with a supercharger
EP0326663A2 (fr) * 1988-02-02 1989-08-09 MAN Gutehoffnungshütte Aktiengesellschaft Machine à vis contrôlée par tiroir et moteur à combustion interne suralimenté qui en est muni

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6414134B1 (en) 1988-12-22 2002-07-02 The Trustees Of The University Of Pennsylvania Regulation of bcl-2 gene expression
WO2012130369A1 (fr) * 2011-03-30 2012-10-04 Bayerische Motoren Werke Aktiengesellschaft Procédé pour faire fonctionner un moteur à combustion interne à débit régulé et moteur à combustion interne
CN103299043A (zh) * 2011-03-30 2013-09-11 宝马股份公司 用于运行数量控制的内燃机的方法和内燃机
US9435295B2 (en) 2011-03-30 2016-09-06 Bayerische Motoren Werke Aktiengesellchaft Method for operating a volume-controlled internal-combustion engine, and an internal-combustion engine

Also Published As

Publication number Publication date
SE9301322D0 (sv) 1993-04-21
SE9301322L (sv) 1994-10-22
SE501252C2 (sv) 1994-12-19

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