SE501252C2 - Supercharged internal combustion engine - Google Patents

Supercharged internal combustion engine

Info

Publication number
SE501252C2
SE501252C2 SE9301322A SE9301322A SE501252C2 SE 501252 C2 SE501252 C2 SE 501252C2 SE 9301322 A SE9301322 A SE 9301322A SE 9301322 A SE9301322 A SE 9301322A SE 501252 C2 SE501252 C2 SE 501252C2
Authority
SE
Sweden
Prior art keywords
expander
supercharger
inlet
internal combustion
combustion engine
Prior art date
Application number
SE9301322A
Other languages
Swedish (sv)
Other versions
SE9301322D0 (en
SE9301322L (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
Priority to SE9301322A priority Critical patent/SE501252C2/en
Publication of SE9301322D0 publication Critical patent/SE9301322D0/en
Priority to PCT/SE1994/000354 priority patent/WO1994024426A1/en
Publication of SE9301322L publication Critical patent/SE9301322L/en
Publication of SE501252C2 publication Critical patent/SE501252C2/en

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

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

The invention relates to a supercharged internal combustion engine (1) comprising a supercharger (4) of screw rotor type and equipped with an adjustable inlet port for capacity regulation and, thus, for regulating the expander function at part load. The air to the supercharger/expander is arranged to be preheated by the engine exhaust pipe (3) when the supercharger (4) is active as an expander in order to increase the expander function.

Description

501 252 För att möjliggöra tillförseln av detta ökade volymflöde till expandem är lämpligen dess inloppsport förstorad i motsvarande grad. 501 252 To enable the supply of this increased volume fl fate to the expander is suitably its inlet port enlarged to a corresponding degree.

Med fördel kan enligt krav 4 en i och för sig förut känd recirkulationskrets för ledning av en del av avgasema via en EGR-ventil till motoms inlopp utnyttjas genom anslutning av kretsen till överladdarens/expandems inlopp, varigenom en ökning av volymflödet och dess tempera- tur emås och därmed en ökad expanderverkan.Advantageously, according to claim 4, a recirculation circuit known per se for guiding one can be used part of the exhaust gases via an EGR valve to the engine inlet is utilized by connecting the circuit to the inlet of the supercharger / expander, whereby an increase in the volume fl fate and its temperature luck and thus an increased expander effect.

För samma ändamål kan med fördel även den i och för sig kända ledningen för vevhusventi- lation vara ansluten till överladdarens/expandems inlopp. Genom att välja anslutningspunkten kan trycknivån i motoms vevhus väljas till lämplig nivå.For the same purpose, the per se known crankcase for the crankcase valve can also be advantageously used. be connected to the inlet of the supercharger / expander. By selecting the connection point the pressure level in the engine crankcase can be selected to the appropriate level.

Styrningen av ventilen för riktning av inloppslufien till överladdaren/expandem är enligt en föredragen utfiáringsforrn anordnad att ske med hjälp av ett tryckavkännande organ i motoms inloppsrör så, att ventilen är ställd att rikta inloppsluften direkt till överladdaren/expandem när det avkända trycket är högre än 0,9 bar och till grenledningen med värmeväxlaren när det avkända trycket är lägre än eller lika med 0,9 bar.The control of the valve for the direction of the inlet lock to the supercharger / expander is according to one preferred ut fi áringsforrn arranged to take place by means of a pressure sensing means in the motor inlet pipe so that the valve is set to direct the inlet air directly to the supercharger / expander when the sensed pressure is higher than 0.9 bar and to the branch line with the heat exchanger when it sensed pressure is less than or equal to 0.9 bar.

Uppfinningen är närmare tydliggjord i det följande under hänvisning till bifogade ritning, som visar en som exempel vald utföringsform av uppfinningen, och på vilken fig. 1 är en schematisk planvy av den överladdade förbränningsmotom och fig. 2 är ett PV-diagram visande den förbättrade expanderverkan.The invention is further elucidated in the following with reference to the accompanying drawing, showing an exemplary embodiment of the invention, and in which fi g. 1 is one schematic plan view of the supercharged internal combustion engine and fi g. 2 is a PV diagram showing the improved expander effect.

Pig. l visar en förbränningsmotor 1 med inloppsrör 2 och avgasrör 3. Till inloppsröret 2 är en av motorns vevaxel driven skruvrotormaskin 4 ansluten fungerande som en kombinerad överladdare och expander. Överladdaren/expandern 4 är på känt sätt försedd med en inlopps- port med reglerbar öppning (ej visad) för reglering av dess kapacitet (se exempelvis ameri- kanska patentskrifien 4, 802,457, Oscarsson eller amerikanska patentskrifien 4,667,646, Shaw). Överladdaren/expandern 4 har en inloppsledning 5 med en luftrenare 6. Till inloppsledningen 5 är en grenledning 7 ansluten för altemativ ledning av inloppsluften till en med avgasröret 3 sarnmanbyggd värmeväxlare 8. För styrning av luften via värmeväxlaren till överladda- ren/expandem är en ventil 9 anordnad i inloppsledningen 5 med det visade läget, som utnytt- jas, när överladdaren/expandem arbetar som expander, vilket indikeras av ett tryck i motoms inloppsrör 2 som är lägre än eller lika med 0,9 bar. Detta tryck avkännes av ett tryckav- kännande organ 10 i motoms inloppsrör 2 som genom en ledning l l är anslutet till ventilen 9. 3 501 252 Vid ett avkänt tryck större än 0,9 bar överför organet 10 en signal till ventilen 9, som då om- ställes till det med streckade linjer markerade läget för styrning av luften direkt till överladda- ren/expandem 4.Pig. 1 shows an internal combustion engine 1 with inlet pipe 2 and exhaust pipe 3. To the inlet pipe 2 is a screwed rotor machine 4 driven by the motor shaft shaft acting as a combined supercharger and expander. The supercharger / expander 4 is provided in a known manner with an inlet port with adjustable opening (not shown) for regulating its capacity (see for example U.S. Patent No. 4,802,457, Oscarsson or U.S. Patent No. 4,667,646, Shaw). The supercharger / expander 4 has an inlet line 5 with an air purifier 6. To the inlet line 5, a branch line 7 is connected for alternative line of the inlet air to one with the exhaust pipe 3 built-in heat exchanger 8. For controlling the air via the heat exchanger to supercharged The valve / expander is a valve 9 arranged in the inlet line 5 with the position shown, which is used jas, when the supercharger / expander works as an expander, which is indicated by a pressure in the motoms inlet pipe 2 which is lower than or equal to 0.9 bar. This pressure is sensed by a pressure sensor. sensing means 10 in the motor inlet pipe 2 which is connected to the valve 9 by a line 11. 3 501 252 At a sensed pressure greater than 0.9 bar, the means 10 transmits a signal to the valve 9, which is then set to the position marked with dashed lines for directing the air directly to the supercharger ren / expandem 4.

När överladdaren/expandem 4 arbetar som expander förvärms luften av värmeväxlaren 8 och expandem 4 tillförs alltså luft med lägre densitet än normalt. För att inte massflödet skall bli reducerat på grund av den höga temperaturen har volymflödet ökats i motsvarande grad genom en ökning av inloppsporten till överladdaren/expandem medelst ett reglerorgan 18, som påverkas av en gaspedal 19.When the supercharger / expander 4 operates as an expander, the air is preheated by the heat exchanger 8 and expander 4 is thus supplied with air with a lower density than normal. In order not to become mass fate reduced due to the high temperature, the volume har has increased correspondingly by increasing the inlet port to the supercharger / expander by means of a control means 18, which is actuated by an accelerator pedal 19.

På grund av luftens expansion i expandern 4 uppnås en viss kylning av luften till motorn, vilket tillsammans med lufiens uppvärmning i värmeväxlaren 8 åstadkommer en ökning av expanderverkan. Eftersom den genom expansionen uppstående kylningen kan bli för liten för att sarrnna temperatur skall erhållas som om luñen skulle tillföras utan uppvärmning är med fördel en laddluñkylare 12 inbyggd i inloppsröret 2.Due to the expansion of the air in the expander 4, a certain cooling of the air to the engine is achieved. which together with the heating of the heat in the heat exchanger 8 causes an increase of expander effect. Because the cooling caused by the expansion may be too small for that the same temperature is to be obtained as if the heat were to be supplied without heating is included distribute a charge cooler 12 built into the inlet pipe 2.

Vidare är en recirkulationskrets 15 med en s.k. EGR-ventil 16 anordnad för recirkulation av en del av avgaserna till motorns inlopp. Denna krets är dock inte ansluten direkt till motoms inlopp utan till överladdarens/expandems 4 inlopp. På så sätt utnyttjas de heta avgaserna för ökning av expanderverkan på liknande sätt som beskrivits ovan beträffande den förvärmda inloppslufien.Furthermore, a recirculation circuit 15 with a so-called EGR valve 16 arranged for recirculation of part of the exhaust gases to the engine inlet. However, this circuit is not connected directly to the motor inlet but to the inlet of the supercharger / expander 4. In this way, the hot exhaust gases are utilized increase in expander effect in a manner similar to that described above with respect to the preheated one inloppslu fi en.

En ytterligare förbättring av expanderverkan har åstadkommits genom att utnyttja en ledning 17 för vevhusventilationen. Även denna ledning är nämligen ansluten till överladda- rens/expandems inlopp, varigenom den varma ventilationsluften med åtföljande oljedimma bidrager till ökad expanderverkan.A further improvement of the expander effect has been achieved by using a line 17 for the crankcase ventilation. This line is also connected to the supercharger. the inlet / expander's inlet, whereby the hot ventilation air with accompanying oil mist contributes to increased expander effect.

Av PV-diagrammet i fig. 2 visar ytan A-B-C-D det uträttade arbetet vid överladdning av motom arbetande med fiill eñekt.Of the PV diagram in fi g. 2 shows the surface A-B-C-D the work performed when supercharging motom working with fi ill eñekt.

Expanderverkan vid 0,6 bar avkänt tryck vid motoms inloppsrör visas av ytan A-E-G-H.The expander effect at 0.6 bar sensed pressure at the engine inlet pipe is shown by the surface A-E-G-H.

Det ökade expanderarbetet vid förvärmd inloppslufi representeras av ytan E-E l-Gl-G. Det ytterligare ökade expanderarbetet genom utnyttjande av recirkulationskretsen 15 representeras av ytan Ez-Gz-Gl-El.The increased expander work in the case of preheated inlet valve fi is represented by the surface E-E 1-Gl-G. The further increased the expander work by utilizing the recirculation circuit 15 is represented of the surface Ez-Gz-Gl-El.

Det är såsom framgår av diagrammet en avsevärd ökning av expanderverkan som uppnås genom uppfinningen.As can be seen from the diagram, a considerable increase in the expander effect is achieved through the recovery.

Claims (6)

501 252 Patentkrav501 252 Patent claims 1. Överladdad förbränningsmotor (1) med en överladdare (4) av skruvrotottyp med reglerbar inloppsport för kapacitetsreglering och därmed reglering av expanderverkan vid dellast och försedd med en transmission förbindande överladdaren/expandem med motoms vevaxel, k ä n n e t e c k n a d d ä r a v, att en inloppskanal (5) till överladdaren/expandem (4) är försedd med en grenledning (7) innefattande en med motoms avgasrör (3) sarnmanbyggd värmeväxlare (8) och en ventil (9) för riktning av inloppslufien alternativt till överladdaren/expandem (4) direkt när överladdaren är verksam eller till överladdaren/expandem via grenledningen (7) och värmeväxlaren (8) när expandern är verksam.A supercharged internal combustion engine (1) with a screw rotor-type supercharger (4) with an adjustable inlet port for capacity control and thus control of the expander effect at partial load and provided with a transmission connecting the supercharger / expander with the engine crankshaft, characterized by an inlet shaft. 5) to the supercharger / expander (4) is provided with a branch line (7) comprising a heat exchanger (8) built together with the engine exhaust pipe (3) and a valve (9) for directing the inlet lock fi an alternative to the supercharger / expander (4) directly when the supercharger is active or to the supercharger / expander via the branch line (7) and the heat exchanger (8) when the expander is active. 2. Överladdad förbränningsmotor enligt krav 1, k ä n n e t e c k n a d d ä r a v, att en mellankylare (12) är anordnad för kylning av lufien från överladdaren/expandem (4) till motom (1 ).A supercharged internal combustion engine according to claim 1, characterized in that an intercooler (12) is provided for cooling the air from the supercharger / expander (4) to the engine (1). 3. Överladdad förbränningsmotor enligt krav l eller 2, k ä n n e t e c k n a d d ä r a v, att överladdaren/expandem (4) är försedd med ett reglerorgan (18) för förstoring av inloppsporten för kompensering av den uppvärmda inloppslufiens minskade densitet.A supercharged internal combustion engine according to claim 1 or 2, characterized in that the supercharger / expander (4) is provided with a control means (18) for enlarging the inlet port to compensate for the reduced density of the heated inlet valve. 4. Överladdad förbränningsmotor enligt något av kraven 1-3, k ä n n e t e c k n a d d ä r a v, att en i och för sig förut känd recirkulationskrets (15) för en del av avgaserna till motoms inlopp med tillhörande EGR-ventil ( 16) är ansluten till överladda- rens/expandems (4) inlopp.A supercharged internal combustion engine according to any one of claims 1-3, characterized in that a per se known recirculation circuit (15) for a part of the exhaust gases to the engine inlet with associated EGR valve (16) is connected to supercharged - clean / expandems (4) inlet. 5. Överladdad förbränningsmotor enligt något av kraven 1-4, k ä n n e t e c k n a d d ä r a v, att motorn är försedd med en i och för sig förut känd ledning (17) för vevhusventilation, vilken ledning är ansluten till överladdarens/expandems (4) inlopp.5. A supercharged internal combustion engine according to any one of claims 1-4, characterized in that the engine is provided with a per se previously known conduit (17) for crankcase ventilation, which conduit is connected to the inlet of the supercharger / expander (4). 6. Överladdad förbränningsmotor enligt något av kraven 1-5, k ä n n et e c k n a d d ä r a v, att ventilen (9) för riktning av inloppsluñen är styrd av ett tryckkännande organ ( 10) i motorns inloppsledning (2) nedströms överladdaren/expandem (4) så, att ventilen (9) är ställd att rikta inloppslufien direkt till överladdaren/expandem (4) när det avkända trycket är högre än 0,9 bar och till grenledningen (7) med värmeväxlaren (8) när det avkända trycket är lägre än eller lika med 0,9 bar.A supercharged internal combustion engine according to any one of claims 1-5, characterized in that the valve (9) for directing the inlet valve is controlled by a pressure sensing means (10) in the engine inlet line (2) downstream of the supercharger / expander (4). ) so that the valve (9) is set to direct the inlet valve till directly to the supercharger / expander (4) when the sensed pressure is higher than 0.9 bar and to the branch line (7) with the heat exchanger (8) when the sensed pressure is lower than or equal to 0.9 bar.
SE9301322A 1993-04-21 1993-04-21 Supercharged internal combustion engine SE501252C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9301322A SE501252C2 (en) 1993-04-21 1993-04-21 Supercharged internal combustion engine
PCT/SE1994/000354 WO1994024426A1 (en) 1993-04-21 1994-04-20 Supercharged internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9301322A SE501252C2 (en) 1993-04-21 1993-04-21 Supercharged internal combustion engine

Publications (3)

Publication Number Publication Date
SE9301322D0 SE9301322D0 (en) 1993-04-21
SE9301322L SE9301322L (en) 1994-10-22
SE501252C2 true SE501252C2 (en) 1994-12-19

Family

ID=20389649

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9301322A SE501252C2 (en) 1993-04-21 1993-04-21 Supercharged internal combustion engine

Country Status (2)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831066A (en) 1988-12-22 1998-11-03 The Trustees Of The University Of Pennsylvania Regulation of bcl-2 gene expression
DE102011006388A1 (en) * 2011-03-30 2012-10-04 Bayerische Motoren Werke Aktiengesellschaft Method for operating a quantity-controlled internal combustion engine and internal combustion engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3043584A1 (en) * 1979-12-06 1981-06-11 Hans Prof. Dipl.-Ing. Dr.Dr.h.c. Graz List Diesel engine with intake air preheater - uses exhaust-heated exchanger and valve to by=pass exchanger at full engine load
SE450511B (en) * 1985-10-14 1987-06-29 Svenska Rotor Maskiner Ab DEVICE FOR A STRUCTURED COMBUSTION ENGINE WITH A CHARGER
DE3803044A1 (en) * 1988-02-02 1989-08-10 Gutehoffnungshuette Man SLIDER-CONTROLLED SCREW-ROTOR MACHINE AND CHARGED COMBUSTION ENGINE

Also Published As

Publication number Publication date
SE9301322D0 (en) 1993-04-21
WO1994024426A1 (en) 1994-10-27
SE9301322L (en) 1994-10-22

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