DE3824406C1 - - Google Patents

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Publication number
DE3824406C1
DE3824406C1 DE3824406A DE3824406A DE3824406C1 DE 3824406 C1 DE3824406 C1 DE 3824406C1 DE 3824406 A DE3824406 A DE 3824406A DE 3824406 A DE3824406 A DE 3824406A DE 3824406 C1 DE3824406 C1 DE 3824406C1
Authority
DE
Germany
Prior art keywords
exhaust gas
exhaust
shut
cylinders
internal combustion
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.)
Expired
Application number
DE3824406A
Other languages
German (de)
Inventor
Herbert 7990 Friedrichshafen De Deutschmann
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.)
Deutschmann Herbert Dipl-Ing Dr 88048 Friedr
Original Assignee
MTU Friedrichshafen GmbH
MTU Motoren und Turbinen Union Friedrichshafen GmbH
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 MTU Friedrichshafen GmbH, MTU Motoren und Turbinen Union Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Priority to DE3824406A priority Critical patent/DE3824406C1/de
Application granted granted Critical
Publication of DE3824406C1 publication Critical patent/DE3824406C1/de
Priority to IT8920663A priority patent/IT1230216B/en
Priority to JP1144300A priority patent/JPH0242125A/en
Priority to FR898909525A priority patent/FR2634519B1/en
Priority to GB8916463A priority patent/GB2220987B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • 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
    • F02B37/002—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel the exhaust supply to one of the exhaust drives can be interrupted
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/02—Cutting-out
    • 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
    • F02M26/01—Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages
    • 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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
    • F02M26/61—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to exhaust pressure
    • F02M26/615—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to exhaust pressure the exhaust back 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
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional 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
    • F02M26/02—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
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
    • 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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

Fuel supply to the engine cylinders 12 can be stopped at no and low partial load. Exhaust-driven turbochargers 16, 17 are designed to be cut in and out by opening and closing exhaust gas shut-off devices 27 and 28 and the engine operates with overlapping cylinder inlet and outlet opening times. Exhaust-driven turbocharger 18 is permanently cut in and its exhaust-gas supply duct 33 has an exhaust-gas restricting device 34 which has a shut-off valve (35, Fig.2), with an orifice (36), which can be brought automatically into the open position against a spring (38) by the flow of exhaust gas. An exhaust back pressure occurs in the exhaust manifold 14 common to all cylinders 11, 12 due to the exhaust restricting device 34. In conjunction with the overlapping opening times of cylinder inlet and outlet, an exhaust backflow occurs from the exhaust manifold 14 into the cylinders 12 cut off from the fuel supply to maintain their temperature. <IMAGE>

Description

Die Erfindung bezieht sich auf eine aufgeladene, mit abschaltbarer Brennstoffversorgung für einige Zylinder ausgebildete Kolbenbrennkraftmaschine, die mit wenigstens einem ab- und zuschaltbaren Abgasturbolader sowie einem, während der Betriebszeit der Kolbenbrennkraftmaschine dauernd zugeschaltetem Abgasturbolader ausgerüstet ist.The invention relates to a charged, with switchable fuel supply for some cylinders trained piston internal combustion engine with at least an exhaust gas turbocharger that can be switched on and off and a while the operating time of the piston internal combustion engine continuously connected turbocharger is equipped.

Zweck einer derartigen Anordnung ist es, einen Betrieb der Kolbenbrennkraftmaschine im Beharrungszustand mit optimal angepaßter Ladeluftversorgung und bei minimalem Brennstoffverbrauch zu gewährleisten. Bei Leerlauf und Teillast sind deshalb nur einige Zylinder leistungabgebend in Betrieb.The purpose of such an arrangement is to operate the Piston engine in the steady state with optimal adapted charge air supply and with minimal To ensure fuel consumption. At idle and part load therefore only a few cylinders deliver power in operation.

Aus der DE 37 04 967 C1 ist eine gattungsgemäße Kolbenbrennkraftmaschine bekannt, bei der die von der Brennstoffversorgung abgeschalteten Zylinder ohne Leistungsabgabe weiter mitlaufen. Die Ventilsteuerzeiten dieser Zylinder sind gegenüber den leistungabgebenden Zylindern nicht verändert, so daß auch im abgeschalteten Zustand Ladungswechsel stattfinden, allerdings nur mit Luft. Da der Wärmeeintrag durch die Verbrennung fehlt, laufen die Ladungswechsel der abgeschalteten Zylinder bei wesentlich niedrigerem Temperaturniveau ab als der Ladungswechsel der leistungabgebenden Zylinder. Die mittlere Temperatur der abgeschalteten Zylinder liegt dadurch erheblich unter der Temperatur der leistungabgegebenden Zylinder. DE 37 04 967 C1 is a generic one Piston engine is known, in which the of the Cylinder switched off without fuel supply Power output continues to run. The valve timing of this Cylinders are not compared to the output cylinders changed so that even in the switched off state charge changes take place, but only with air. Because the heat input through the combustion is missing, the charge changes run deactivated cylinder at much lower Temperature level from than the charge change of the output cylinder. The mean temperature of the deactivated cylinder is therefore significantly below the Output cylinder temperature.  

Bei einer Lastaufschaltung, die die Inbetriebnahme vorher abgeschalteter Zylinder erforderlich macht, ergibt sich in Abhängigkeit der in der Kolbenbrennkraftmaschine und in der Umgebung herrschenden Temperaturverhältnisse eine unerwünschte und unzulässige Abgasemission.With a load connection, the commissioning beforehand deactivated cylinder requires, results in Dependency of that in the piston internal combustion engine and in the Environment prevailing temperature conditions an undesirable and impermissible exhaust gas emissions.

Es ist Aufgabe der Erfindung, beim Lastaufschalten einer Kolbenbrennkraftmaschine, bei der von der Brennstoffversorgung abgeschaltete Zylinder in Betrieb genommen werden, eine unzulässige Abgasemission zu vermeiden.It is an object of the invention when a load is applied Piston engine in the case of the fuel supply deactivated cylinders are put into operation, a to avoid impermissible exhaust gas emissions.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen von Patentanspruch 1 gelöst. Eine Ausgestaltung der Erfindung erfolgt mit den Merkmalen des Anspruches 2 und 3. Bei Leerlauf und kleiner Teillast ergibt sich bei Abschaltung einiger Zylinder und Abschaltung der schaltbaren Abgasturbolader ein Abgasrückstau in der für alle Zylinder gemeinsamen Abgasleitung, da die selbsttätige Abgasklappe infolge des geringen Abgasmassenstromes und der Wirkung der Feder ihre Schließstellung einnimmt. Der Abgasrückstau bewirkt in Verbindung mit den sich überschneidenden Öffnungszeiten von Zylinder-Ein- und -Auslaß einen Abgasrückstrom aus der Abgasleitung in die Zylinder, und zwar auch in die von der Brennstoffversorgung abgeschalteten Zylinder. Damit wird vor allem die mittlere Temperatur in den von der Brennstoffversorgung abgeschalteten Zylindern merklich angehoben. Diese Temperaturerhöhung ergibt bei einer Lastaufschaltung die angestrebte Verbesserung des Abgasemissionsverhaltens der Kolbenbrennkraftmaschine.This object is achieved with the features of Claim 1 solved. An embodiment of the invention takes place with the features of claims 2 and 3. At idle and small partial load results when some are switched off Cylinder and shutdown of the switchable exhaust gas turbocharger Exhaust gas back pressure in the exhaust pipe common to all cylinders, because the automatic exhaust flap due to the low Exhaust gas mass flow and the effect of the spring In the closed position. The exhaust gas backflow causes in Link with the overlapping opening times of Cylinder inlet and outlet an exhaust gas backflow from the Exhaust pipe in the cylinder, and also in that of the Cylinder off fuel supply. With that, before all the average temperature in the of the Fuel supply switched off cylinders noticeably raised. This temperature increase results in a Load activation the desired improvement of Exhaust emission behavior of the piston internal combustion engine.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß sich gleichmäßige Bauteiltemperaturen in gesamten Betriebsbereich der Kolbenbrennkraftmaschine ergeben, daß für die selbsttätige Abgasklappe kein zusätzlicher Steuer- und Regelaufwand erforderlich ist und daß sich mit der Anordnung eine wirtschaftlich durchführbare Nachrüstung bestehender Kolbenbrennkraftmaschinen ergibt.The advantages achieved with the invention are in particular in that there are uniform component temperatures throughout Operating range of the piston engine show that for the automatic exhaust flap no additional control and Regular effort is required and that with the arrangement an economically feasible retrofit of existing ones  Piston internal combustion engines results.

Ein Ausführungsbeispiel der Erfindung wird an Hand der Zeichnung näher beschrieben. Es zeigen:An embodiment of the invention is based on the drawing described in more detail. Show it:

Fig. 1 eine schematische Darstellung einer Kolbenbrennkraftmaschine mit zwei abschaltbaren und einem dauernd in Betrieb befindlichen Abgasturbolader sowie mit von der Brennstoffversorgung abschaltbaren Zylindern; Fig. Disconnectable 1 is a schematic representation of a piston internal combustion engine with two and a continuously operating ski turbocharger as well as turn-off of the fuel supply cylinders;

Fig. 2 Detaildarstellung einer selbsttätigen Abgasklappe nach Einzelheit II in Fig. 1. Fig. 2 detail view of an automatic exhaust valve according to detail II in FIG. 1.

Eine Kolbenbrennkraftmaschine 10 besteht aus zwei Gruppen von Zylindern 11 und 12, die aus einer Ladeluftsammelleitung 13 mit vorverdichteter Ladeluft versorgt werden. Den Zylindern 11, 12 ist eine Abgassammelleitung 14 zugeordnet. Die Ladeluftversorgung der Kolbenbrennkraftmaschine 10 erfolgt durch drei parallel arbeitende Abgasturbolader 16, 17, 18, die jeweils aus einer Abgasturbine 19, 20, 21 und einem Ladeluftverdichter 22, 23, 24 bestehen.A piston internal combustion engine 10 consists of two groups of cylinders 11 and 12 , which are supplied with pre-compressed charge air from a charge air manifold 13 . An exhaust manifold 14 is assigned to the cylinders 11 , 12 . The charge air supply to the piston internal combustion engine 10 is provided by three exhaust gas turbochargers 16 , 17 , 18 operating in parallel, each consisting of an exhaust gas turbine 19 , 20 , 21 and a charge air compressor 22 , 23 , 24 .

Die Abgasturbolader 16, 17 sind durch steuerbare Abgas-Absperreinrichtungen 27, 28, die in der jeweiligen Abgaszuleitung 25, 26 angeordnet sind und durch selbstätige Ladeluft-Absperreinrichtung 29, 30, die die Ladeluftsaugleitungen 31, 32 beherrschen, ab- und zuschaltbar ausgebildet. Bei Vollast der Kolbenbrennkraftmaschine 10, wenn alle Zylinder 11 und 12 leistungabgebend arbeiten, sind alle drei Abgasturbolader 16, 17, 18 zugeschaltet. Bei Leerlauf und kleiner Teillast ist nur der nicht abschaltbare Abgasturbolader 18 zur Versorgung der Kolbenbrennkraftmaschine 10 mit Ladeluft in Betrieb. Gleichzeitig sind dann die Zylinder 12 von der Brennstoffversorgung abgeschaltet und laufen ohne Leistungsabgabe mit. Die Gaswechselsteuerung aller Zylinder 11, 12 der Kolbenbrennkraftmaschine 10 arbeitet mit sich überschneidenden Steuerzeiten von Zylinder-Ein- und -Auslaß.The exhaust gas turbochargers 16 , 17 are designed so that they can be switched on and off by controllable exhaust gas shut-off devices 27 , 28 which are arranged in the respective exhaust gas supply line 25 , 26 and by automatic charge air shut-off devices 29 , 30 which control the charge air suction lines 31 , 32 . When the piston internal combustion engine 10 is at full load, when all the cylinders 11 and 12 are working, all three exhaust gas turbochargers 16 , 17 , 18 are switched on. At idle and low partial load, only the exhaust gas turbocharger 18 that cannot be switched off is used to supply the piston internal combustion engine 10 with charge air. At the same time, the cylinders 12 are then switched off from the fuel supply and run with no power output. The gas exchange control of all cylinders 11 , 12 of the piston internal combustion engine 10 works with overlapping control times of the cylinder inlet and outlet.

In der Abgaszuleitung 33 zur Abgasturbine 21 des nicht abschaltbaren Abgasturboladers 18 ist eine Abgas-Absperreinrichtung 34 angeordnet. Die Abgas-Absperreinrichtung 34 besteht aus einer mit einer Achse 39 drehfest verbundene Absperrklappe 35 und einem drehfest mit der Achse 39 verbundenen Hebel 37 an dem eine die Absperrklappe 35 in Schließstellung haltende Feder 38 befestigt ist. Die Achse 39 ist exzentrisch zum Flächenschwerpunkt der Absperrklappe 35 angeordnet. Ein auf die geschlossene Absperrklappe 35 auftreffender Abgastrom erzeugt dadurch ein in Öffnungssinn wirkendes Drehmoment. Die Absperrklappe 35 öffnet sich selbsttätig, wenn das erzeugte Drehmoment die Schließkraft der Feder 38 überwindet. In der Absperrklappe 35 ist eine nicht verschließbare Öffnung 36 angeordnet. Feder 38 und Öffnung 36 sind so bemessen, daß die Absperrklappe gegen den bei Leerlauf und kleiner Teillast vorhandenen Abgasmassenstrom der Kolbenbrennkraftmaschine 10 in geschlossener Stellung verharrt. Stromauf der Abgas-Absperreinrichtung 34 entsteht dadurch ein Abgasrückstau in der Abgassammelleitung 14. In Verbindung mit den sich überschneidenden Steuerzeiten von Zylinder-Ein- und -Auslaß bewirkt der Abgasrückstau eine innere Abgasrückführung in die Zylinder 11 und 12. Damit wird bei den von der Brennstoffversorgung abgeschalteten Zylindern 12 eine merkliche Anhebung der mittleren Temperatur erreicht, so daß bei einer weiteren Lastaufschaltung mit Übergang auf den Vollbetrieb aller Zylinder 11 und 12 der Betrieb der Kolbenbrennkraftmaschine 10 ohne unzulässige Abgasemission erfolgt.An exhaust gas shut-off device 34 is arranged in the exhaust gas feed line 33 to the exhaust gas turbine 21 of the exhaust gas turbocharger 18 which cannot be switched off. The exhaust gas shut-off device 34 consists of a shut-off valve 35, which is connected in a rotationally fixed manner to an axis 39, and a lever 37 , which is connected in a rotationally fixed manner to the axis 39 , to which a spring 38 holding the shut-off valve 35 in the closed position is fastened. The axis 39 is arranged eccentrically to the center of gravity of the butterfly valve 35 . An exhaust gas stream striking the closed butterfly valve 35 thereby generates a torque acting in the opening direction. The butterfly valve 35 opens automatically when the torque generated overcomes the closing force of the spring 38 . A non-closable opening 36 is arranged in the butterfly valve 35 . The spring 38 and opening 36 are dimensioned such that the shut-off valve remains in the closed position against the exhaust gas mass flow of the piston internal combustion engine 10 which is present at idling and at low partial load. This creates an exhaust gas backflow in the exhaust gas manifold 14 upstream of the exhaust gas shutoff device 34 . In connection with the overlapping control times of the cylinder inlet and outlet, the exhaust gas backflow causes an internal exhaust gas recirculation into the cylinders 11 and 12 . This results in a noticeable increase in the mean temperature in the cylinders 12 which are switched off from the fuel supply, so that the piston engine 10 is operated without impermissible exhaust gas emission in the event of a further load application with the transition to full operation of all cylinders 11 and 12 .

Claims (3)

1. Aufgeladene, mit abschaltbarer Brennstoffversorgung für einige Zylinder (12) ausgebildete Kolbenbrennkraftmaschine (10), der mehrere parallel arbeitende Abgasturbolader (16, 17, 18) zugeordnet sind und wenigstens einer der Abgasturbolader (16, 17) ab- und zuschaltbar ausgebildet ist, wobei jeder schaltbare Abgasturbolader (16, 17) vor dem Abgaseinlaß seiner Abgasturbine (19, 20) eine steuerbare Absperreinrichtung (27, 28) und vor dem Ladelufteinlaß seines Ladeluftverdichters (22, 23) eine selbsttätige Ladeluft-Absperreinrichtung (29, 30) aufweist, bei einem der Abgasturbolader (18) eine Abgas-Absperreinrichtung (34) angeordnet ist, die eine vom Abgasstrom selbsttätig gegen eine Feder (38) in Offenstellung bringbare Absperrklappe (35) aufweist und die Gaswechselsteuerung der Kolbenbrennkraftmaschine (10) mit sich überschneidenden Öffnungszeiten von Zylinder-Ein- und -Auslaß arbeitet.1. supercharged piston internal combustion engine ( 10 ) designed with a switchable fuel supply for some cylinders ( 12 ), to which several exhaust gas turbochargers ( 16 , 17 , 18 ) working in parallel are assigned and at least one of the exhaust gas turbochargers ( 16 , 17 ) is designed to be switchable and switchable, Each switchable exhaust gas turbocharger ( 16 , 17 ) has a controllable shut-off device ( 27 , 28 ) in front of the exhaust gas inlet of its exhaust gas turbine ( 19 , 20 ) and an automatic charge air shut-off device ( 29 , 30 ) in front of the charge air inlet of its charge air compressor ( 22 , 23 ), In one of the exhaust gas turbochargers ( 18 ), an exhaust gas shut-off device ( 34 ) is arranged, which has a shut-off flap ( 35 ) that can be brought into the open position automatically by the exhaust gas flow against a spring ( 38 ) and the gas exchange control of the piston internal combustion engine ( 10 ) with overlapping opening times of cylinders -Inlet and outlet works. 2. Aufgeladene Kolbenbrennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die um eine Achse (39) drehbare Absperrklappe (35) bei Zuordnung zu einem dauernd zugeschalteten Abgasturbolader (18) eine auf den Abgasmassenstrom bei Leerlauf abgestimmte, unverschließbare Öffnung (36) aufweist.2. Supercharged piston internal combustion engine according to claim 1, characterized in that the shut-off valve ( 35 ) which can be rotated about an axis ( 39 ), when assigned to a continuously activated exhaust gas turbocharger ( 18 ), has a non-closable opening ( 36 ) which is matched to the exhaust gas mass flow when idling. 3. Aufgeladene Kolbenbrennkraftmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Achse (39) exzentrisch zum Flächenschwerpunkt der Abgasklappe (35) angeordnet ist.3. Supercharged piston internal combustion engine according to claim 1 or 2, characterized in that the axis ( 39 ) is arranged eccentrically to the center of area of the exhaust flap ( 35 ).
DE3824406A 1988-07-19 1988-07-19 Expired DE3824406C1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE3824406A DE3824406C1 (en) 1988-07-19 1988-07-19
IT8920663A IT1230216B (en) 1988-07-19 1989-05-26 ENDOTHERMAL PISTON ENGINE, SUPERCHARGED, CARRIED OUT WITH THE FUEL SUPPLY SYSTEM DISARMABLE FOR SOME CYLINDERS.
JP1144300A JPH0242125A (en) 1988-07-19 1989-06-08 Supercharged piston internal combustion engine formed by fuel feeder interruptable to several cylinder
FR898909525A FR2634519B1 (en) 1988-07-19 1989-07-13 INTERNAL COMBUSTION ENGINE WITH TURBOCHARGERS IN WHICH THE FUEL INTAKE IN CERTAIN CYLINDERS CAN BE CUT
GB8916463A GB2220987B (en) 1988-07-19 1989-07-19 A forced-induction reciprocating internal-combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3824406A DE3824406C1 (en) 1988-07-19 1988-07-19

Publications (1)

Publication Number Publication Date
DE3824406C1 true DE3824406C1 (en) 1989-05-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE3824406A Expired DE3824406C1 (en) 1988-07-19 1988-07-19

Country Status (5)

Country Link
JP (1) JPH0242125A (en)
DE (1) DE3824406C1 (en)
FR (1) FR2634519B1 (en)
GB (1) GB2220987B (en)
IT (1) IT1230216B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816840A1 (en) * 1998-04-16 1999-10-21 Mtu Friedrichshafen Gmbh Internal combustion engine with several exhaust gas turbochargers which can be optionally switched on and off
DE19823014A1 (en) * 1998-05-22 1999-11-25 Udo Mailaender Gmbh Method of charging an internal combustion engine
DE19831251A1 (en) * 1998-07-11 2000-01-13 Daimler Chrysler Ag Turbocharged IC engine with selected cylinders switched off, has exhaust driven turbocharger for constantly working cylinders and mechanical turbocharger for selected cylinders
EP1619368A1 (en) 2004-07-21 2006-01-25 Bayerische Motoren Werke Aktiengesellschaft Sequential turbocharging control with cylinder deactivation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6715289B2 (en) * 2002-04-08 2004-04-06 General Motors Corporation Turbo-on-demand engine with cylinder deactivation
GB0510160D0 (en) * 2005-05-18 2005-06-22 Leavesley Malcolm G Twin turbocharger apparatus
GB2430708B (en) * 2005-10-03 2010-09-22 Ford Global Tech Llc Turbo charging in a variable displacement engine
EP2006506A1 (en) * 2007-06-22 2008-12-24 ABB Turbo Systems AG Charging system for a combustion engine
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Also Published As

Publication number Publication date
FR2634519B1 (en) 1991-08-16
IT8920663A0 (en) 1989-05-26
GB2220987B (en) 1992-04-15
IT1230216B (en) 1991-10-18
GB2220987A (en) 1990-01-24
FR2634519A1 (en) 1990-01-26
JPH0242125A (en) 1990-02-13
GB8916463D0 (en) 1989-09-06

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