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DE2838681A1 - Turbocharged otto engine - has part load inlet valves closing during inlet stroke and switchable main inlet valves closing after BDC - Google Patents

Turbocharged otto engine - has part load inlet valves closing during inlet stroke and switchable main inlet valves closing after BDC

Info

Publication number
DE2838681A1
DE2838681A1 DE19782838681 DE2838681A DE2838681A1 DE 2838681 A1 DE2838681 A1 DE 2838681A1 DE 19782838681 DE19782838681 DE 19782838681 DE 2838681 A DE2838681 A DE 2838681A DE 2838681 A1 DE2838681 A1 DE 2838681A1
Authority
DE
Germany
Prior art keywords
inlet valves
inlet valve
valves closing
inlet
valves
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.)
Ceased
Application number
DE19782838681
Other languages
German (de)
Inventor
Knut G L Ing Grad Hockel
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19782838681 priority Critical patent/DE2838681A1/en
Publication of DE2838681A1 publication Critical patent/DE2838681A1/en
Ceased 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
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0223—Variable control of the intake valves only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0257—Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0276—Actuation of an additional valve for a special application, e.g. for decompression, exhaust gas recirculation or cylinder scavenging
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1824—Number of cylinders six
    • 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)
  • Characterised By The Charging Evacuation (AREA)

Abstract

The Otto engine (7) has a partial load inlet valve (8) and a main inlet valve (9) for each cylinder (1-6) with different timing for the two valves (8, 9). The valves (8) operate continuously whilst the valves (9) can be switched on and off. The valves (8) open for a short time only and close near the middle of the inlet stroke whilst the valves (9) close no later than 25 deg. after BDC. The engine is provided with a turbo-charger (14).

Description

BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT, 8000 MünchenBAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT, 8000 Munich

Ottο-Brennkraftma s chineOtto combustion engine

Die Erfindung bezieht sich auf eine Otto-Brennkraftmaschine der im Oberbegriff des Anspruches beschriebenen Bauart.The invention relates to an internal combustion engine of the type described in the preamble of the claim.

Bei einer bekannten Otto-Brennkraftmaschine dieser Bauart Γ (DE-OS 800 616) ist jede Einlaßventilgruppe mit einem eigenen Ansaugsystem mit in Bezug auf die Gemischbildung unabhängig arbeitendem Vergaser ausgestattet.In a known Otto internal combustion engine of this type Γ (DE-OS 800 616), each inlet valve group has its own Intake system equipped with a carburettor that works independently in terms of mixture formation.

Der Erfindung liegt die Aufgabe zugrunde, eine Otto-Brennkraftmaschine der im Oberbegriff des Anspruches beschriebenen Art mit einem einfachen Ansaugsystem zu schaffen, bei der im Teillastbereich eine besonders gute Ausnutzung des Kraftstoffes und damit eine Ersparnis erreicht wird und ggf. ein hohes Drehmoment zur Verfügung steht.The invention is based on the object of a gasoline internal combustion engine to create the type described in the preamble of claim with a simple intake system which in the partial load range a particularly good utilization of the fuel and thus a saving is achieved and if necessary, a high torque is available.

Diese Aufgabe löst die Erfindung durch die kennzeichnenden Merkmale des Anspruches. Die erfindungsgemäße Ausbildung ist sowohl bei Einspritzmotoren als auch bei Vergasermotoren anwendbar, wobei für die letzteren unter Umständen eine Saugrohrbeheizung erforderlich ist. Damit werden getrennte Ansaugsysteme für die beiden Einlaßventilgruppen überflüssig. The invention solves this problem by the characterizing features of the claim. The training according to the invention can be used with injection engines as well as with carburetor engines, with one for the latter under certain circumstances Suction pipe heating is required. This means that separate intake systems for the two groups of intake valves are superfluous.

Durch die erfindungsgemäße Ausgestaltung wird im unteren Drehzahlbereich eine Drehmomentenanhebung erreicht, ohne daß im oberen Drehzahlbereich eine Verminderung der Volllastleistung in Kauf genommen werden muß, da hier die Aufladung eine Drehmomentanhebung bewirkt.The design according to the invention is in the lower Speed range, a torque increase is achieved without a reduction in full load power in the upper speed range must be taken into account, since this is the charge causes a torque increase.

Durch die Erfindung wird neben einer Verringerung des Kraftstoffverbrauches durch niedrige Prozeßtemperaturen imThe invention in addition to a reduction in fuel consumption through low process temperatures in the

030011/04 18030011/04 18

Teillastbereich auch der NOx-Gehalt der Abgase verringert. In einer erfindungsgemäßen Otto-Brennkraftmaschine sollte das Haupt-Einlaßventil so groß wie nötig und das Teillast-Einlaßventil so groß wie möglich ausgelegt sein. Obwohl beide Einlaßventile gleich groß sein können, wird diese Forderung aufgrund des beschränkten Raumes meistens dazu führen, daß das Teillast-Einlaßventil kleiner als das Haupt-Einlaßventil ist.Partial load range also reduces the NO x content of the exhaust gases. In an Otto internal combustion engine according to the invention, the main inlet valve should be designed as large as necessary and the partial load inlet valve should be designed as large as possible. Although both inlet valves can be of the same size, this requirement, because of the limited space, will usually result in the partial load inlet valve being smaller than the main inlet valve.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispieles näher erläutert. Es zeigen: The invention is explained in more detail below using an exemplary embodiment. Show it:

Fig. 1 ein Schema einer Brennkraftmaschine mit je einem Teillast- und einem Haupt-Einlaßventil für jeden Zylinder,Fig. 1 is a diagram of an internal combustion engine with a partial load and a main inlet valve for each Cylinder,

Fig. 2 die Ventilerhebungskurven der Einlaßventile der Brennkraftmaschine nach Fig. 1 und2 shows the valve lift curves of the intake valves of the internal combustion engine according to FIGS. 1 and

Fig. 3 das zu Fig. 2 gehörige Motor-Kennfeld.FIG. 3 shows the engine characteristic map belonging to FIG. 2.

Sechs Zylinder 1, 2, 3, 4, 5 und 6 einer Otto-Brennkraftmaschine 7 sind jeweils mit einem Teillast- und einem Haupt-Einlaßventil 8 bzw. 9 und mit einem Auslaßventil 10 versehen. Die Einlaßventile 8 und 9 werden jeweils durch eine gemeinsame Einlaßleitung 11 gespeist, die von einem Ansaugverteiler 12 ausgeht. In einer zum Ansaugverteiler 12 führenden Ansaugleitung 13 ist ein Abgasturbolader 14 angeordnet, dessen nicht dargestellter Turbinenteil über eine an die Auslaßventile 10 angeschlossene Abgassammelleitung 15 mit Abgas beaufschlagt wird.Six cylinders 1, 2, 3, 4, 5 and 6 of an Otto internal combustion engine 7 are each with a partial load and a main inlet valve 8 or 9 and provided with an outlet valve 10. The inlet valves 8 and 9 are each shared by a Inlet line 11, which starts from an intake manifold 12, is fed. In one leading to the intake manifold 12 Intake line 13 is an exhaust gas turbocharger 14, the turbine part (not shown) is connected to the exhaust valves 10 connected exhaust manifold 15 is acted upon with exhaust gas.

Die Teillast-Einlaßventile 8 und die Haupt-Einlaßventile 9 sind mit verschiedenen Steuerzeiten betätigbar. Die Haupt-Einlaßventile 9 sind zu- und abschaltbar.The partial load inlet valves 8 and the main inlet valves 9 can be actuated with different control times. The main inlet valves 9 can be switched on and off.

_ 4 _ 030011/0418_ 4 _ 030011/0418

Beim Betrieb der Otto-Brennkraftmaschine sind die Teillast-Einlaßventile 8 ständig in Betrieb und die Haupt-Einlaßventile 9 werden je nach Leistungsanforderung zu- oder abgeschaltet. Die Teillast-Einlaßventile 8 werden jeweils nur relativ kurzzeitig geöffnet und ihr Einlaßschluß liegt etwa in der Mitte des Ansaugtaktes. Die Haupt-Einlaßventile werden spätestens bei 25° Kurbelwinkel nach dem unteren Totenpunkt geschlossen. Dadurch wird das Drehmoment im Bereich niedrigerer Drehzahlen angehoben. Durch den Turbolader 14 wird zusätzlich die Vollast-Leistung erhöht.When the Otto engine is in operation, the inlet valves are part-load 8 constantly in operation and the main inlet valves 9 are switched on or off depending on the performance requirement. The partial load inlet valves 8 are only opened for a relatively short time and their inlet closure is approximately in the middle of the intake stroke. The main inlet valves are at the latest at 25 ° crank angle after the bottom dead center closed. This increases the torque in the range of lower speeds. Through the turbocharger 14 the full load output is also increased.

030011/0418030011/0418

Claims (1)

BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT, 8000 MünchenBAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT, 8000 Munich Otto-BrennkraftmaschineOtto internal combustion engine PatentanspruchClaim Otto-Brennkraftmaschine mit je einem Teillast- und Haupt-Einlaßventil für jeden Zylinder, die mit verschiedenen, entsprechend den Drehzahlbereichen abgestimmten Steuerzeiten betätigbar sind, wobei das Teillast-Einlaßventil ständig in Betrieb und das Haupt-Einlaßventil zu- und abschaltbar ist, dadurch gekennzeichnet, daß das Teillast-Einlaßventil (8) eine kurze Öffnungsdauer aufweist und sein Einlaßschluß etwa in der Mitte des Ansaugtaktes liegt, daß der Einlaßschluß des Haupteinlaßventiles (9) spätestens bei einem Kurbelwinkel von 25° nach dem unteren Totpunkt liegt und daß die Brennkraftmaschine mit einer Aufladeeinrichtung (Turbolader 14) ausgerüstet ist.Otto internal combustion engine with one part load and one main inlet valve each for each cylinder, with different control times coordinated according to the speed ranges can be actuated, the partial load inlet valve continuously in operation and the main inlet valve being able to be switched on and off is, characterized in that the partial load inlet valve (8) has a short opening duration and its inlet closure approximately in the middle of the intake stroke is that the inlet closure of the main inlet valve (9) at the latest at a crank angle of 25 ° after bottom dead center and that the internal combustion engine is equipped with a supercharger (Turbocharger 14) is equipped. 030011/0418030011/0418
DE19782838681 1978-09-05 1978-09-05 Turbocharged otto engine - has part load inlet valves closing during inlet stroke and switchable main inlet valves closing after BDC Ceased DE2838681A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782838681 DE2838681A1 (en) 1978-09-05 1978-09-05 Turbocharged otto engine - has part load inlet valves closing during inlet stroke and switchable main inlet valves closing after BDC

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782838681 DE2838681A1 (en) 1978-09-05 1978-09-05 Turbocharged otto engine - has part load inlet valves closing during inlet stroke and switchable main inlet valves closing after BDC

Publications (1)

Publication Number Publication Date
DE2838681A1 true DE2838681A1 (en) 1980-03-13

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DE19782838681 Ceased DE2838681A1 (en) 1978-09-05 1978-09-05 Turbocharged otto engine - has part load inlet valves closing during inlet stroke and switchable main inlet valves closing after BDC

Country Status (1)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2494776A1 (en) * 1980-11-25 1982-05-28 Opel Adam Ag FOUR-STROKE INTERNAL COMBUSTION ENGINE EMPLOYING A MIXTURE OF AIR AND FUEL AND METHOD OF OPERATING SAME
DE3306355A1 (en) * 1983-02-24 1984-08-30 Ford-Werke AG, 5000 Köln INTERNAL COMBUSTION ENGINE WITH VARIABLE CHANGE-OF-CHARGE TIMES
DE3400926A1 (en) * 1983-02-02 1984-09-06 Alfa Romeo Auto S.p.A., Neapel/Napoli INLET SYSTEM FOR A COMBUSTION ENGINE EQUIPPED WITH SEVERAL INLET VALVES
DE3621080A1 (en) * 1985-06-24 1987-01-02 Nissan Motor VALVE TIMING DEVICE FOR COMBUSTION ENGINES WITH SEVERAL INLET VALVES PER CYLINDER
DE3724495A1 (en) * 1987-07-24 1989-02-02 Audi Ag Valve-timed four-stroke reciprocating piston internal combustion engine with applied ignition
EP0360408A3 (en) * 1988-09-20 1990-06-13 Ford Motor Company Limited Engine induction system and method
DE3841355A1 (en) * 1988-12-08 1990-06-13 Audi Ag Method for increasing the displacement of a valve-timed reciprocating piston internal combustion engine
DE4411434A1 (en) * 1994-03-31 1995-10-05 Bayerische Motoren Werke Ag IC engine valve operation method with two inlet valves per cylinder
DE10239224B4 (en) * 2001-09-07 2005-03-17 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Valve drive for double camshaft motor with three valves
EP1818517A3 (en) * 2006-02-09 2009-05-13 Bayerische Motoren Werke Aktiengesellschaft Engine with electric valve drive

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2494776A1 (en) * 1980-11-25 1982-05-28 Opel Adam Ag FOUR-STROKE INTERNAL COMBUSTION ENGINE EMPLOYING A MIXTURE OF AIR AND FUEL AND METHOD OF OPERATING SAME
DE3400926A1 (en) * 1983-02-02 1984-09-06 Alfa Romeo Auto S.p.A., Neapel/Napoli INLET SYSTEM FOR A COMBUSTION ENGINE EQUIPPED WITH SEVERAL INLET VALVES
DE3306355A1 (en) * 1983-02-24 1984-08-30 Ford-Werke AG, 5000 Köln INTERNAL COMBUSTION ENGINE WITH VARIABLE CHANGE-OF-CHARGE TIMES
DE3621080A1 (en) * 1985-06-24 1987-01-02 Nissan Motor VALVE TIMING DEVICE FOR COMBUSTION ENGINES WITH SEVERAL INLET VALVES PER CYLINDER
DE3621080C3 (en) * 1985-06-24 1998-07-09 Nissan Motor Valve timing device for internal combustion engines with multiple intake valves per cylinder
DE3724495A1 (en) * 1987-07-24 1989-02-02 Audi Ag Valve-timed four-stroke reciprocating piston internal combustion engine with applied ignition
EP0360408A3 (en) * 1988-09-20 1990-06-13 Ford Motor Company Limited Engine induction system and method
DE3841355A1 (en) * 1988-12-08 1990-06-13 Audi Ag Method for increasing the displacement of a valve-timed reciprocating piston internal combustion engine
DE4411434A1 (en) * 1994-03-31 1995-10-05 Bayerische Motoren Werke Ag IC engine valve operation method with two inlet valves per cylinder
DE4411434C2 (en) * 1994-03-31 2003-02-06 Bayerische Motoren Werke Ag Operating method for an internal combustion engine with at least two intake valves
DE10239224B4 (en) * 2001-09-07 2005-03-17 General Motors Corp. (N.D.Ges.D. Staates Delaware), Detroit Valve drive for double camshaft motor with three valves
EP1818517A3 (en) * 2006-02-09 2009-05-13 Bayerische Motoren Werke Aktiengesellschaft Engine with electric valve drive

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Legal Events

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OAM Search report available
OB Request for examination as to novelty
8110 Request for examination paragraph 44
8131 Rejection