DE3926423A1 - Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke - Google Patents

Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke

Info

Publication number
DE3926423A1
DE3926423A1 DE3926423A DE3926423A DE3926423A1 DE 3926423 A1 DE3926423 A1 DE 3926423A1 DE 3926423 A DE3926423 A DE 3926423A DE 3926423 A DE3926423 A DE 3926423A DE 3926423 A1 DE3926423 A1 DE 3926423A1
Authority
DE
Germany
Prior art keywords
stroke
inlet
inlet member
combustion chamber
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Withdrawn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
DE3926423A
Other languages
German (de)
Inventor
Quang-Hue Vo
Herbert Clemens
Harald Hornig
Michael Dr Maurer
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 DE3926423A priority Critical patent/DE3926423A1/en
Publication of DE3926423A1 publication Critical patent/DE3926423A1/en
Withdrawn legal-status Critical Current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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
    • F02B47/04—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only
    • F02B47/08—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being other than water or steam only the substances including exhaust gas
    • 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
    • F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
    • 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
    • F02D13/0261—Controlling the valve overlap
    • 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
    • F02D13/0273—Multiple actuations of a valve within an engine cycle
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
    • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

A four-stroke internal combustion engine has the valve timing arranged so that the inlet valve opens for a short time during the exhaust stroke preceding the compression stroke. The engine may have two inlet valves to each combustion chamber. The first inlet valve opens at just before bottom dead-centre whilst the second inlet valve begins to open at or just before top dead-centre. At least at higher engine load points, the duration of the opening of the second inlet valve is shorter than that of the first inlet valve. USE/ADVANTAGE - Reduction of unburnt fuel in exhaust gases and the engine runs more smoothly when idling.

Description

Die Erfindung betrifft ein Ladungswechselverfahren für eine 4-Takt-Hubkolben-Brennkraftmaschine mit zumindest einem Brennraum-Einlaßorgan, worüber die Ladungszufuhr zum Zylinder im wesentlichen im Verdichtungstakt er­ folgt.The invention relates to a charge exchange process for a 4-stroke reciprocating internal combustion engine with at least a combustion chamber inlet, via which the charge supply to the cylinder essentially in the compression stroke follows.

Ein derartiges Ladungswechselverfahren ist aus der DE-PS 37 16 947 bekannt.Such a gas exchange process is over DE-PS 37 16 947 known.

Die wesentliche Lehre dieser Schrift ist es, ein Brenn­ raum-Einlaßorgan im wesentlichen während des Verdich­ tungstaktes zu öffnen. Aufgrund des während des voran­ gegangenen Saugtaktes im Brennraum aufgebauten Unter­ druckes ergibt sich hiermit eine verbesserte Verwirbe­ lung der dem Brennraum zugeführten Ladung. In jener Schrift wird auch vorgeschlagen, das Einlaßorgan zu­ sätzlich kurzzeitig während des dem Verdichtungstakt vorausgehenden Saugtaktes zu öffnen. Hierdurch wird nicht nur der sich im Brennraum einstellende Unterdruck in seiner Höhe begrenzt, sondern es kann hierbei im Sinne einer verbesserten Gemischaufbereitung auch eine geringe Menge fetten Gemisches vorgelagert werden.The main teaching of this scripture is a focal point space inlet organ essentially during compression open tact clock. Because of the advance gone suction cycle built in the combustion chamber pressure, this results in an improved interlacing the charge fed to the combustion chamber. In that Scripture is also suggested to the inlet organ too additionally briefly during the compression cycle previous suction cycle to open. This will not only the negative pressure that arises in the combustion chamber limited in height, but it can be used here To improve the mixture preparation also one small amount of fat mixture can be stored.

Trotz des verbesserten Wirkungsgrades sind am bekannten Ladungswechsel-Verfahren Verbesserungen im Hinblick auf die Abgas-Rohemissionen wünschenswert. Derartige Ver­ besserungen aufzuzeigen, hat sich die Erfindung zur Aufgabe gestellt.Despite the improved efficiency are known Charge exchange process improvements with regard to the raw exhaust gas emissions are desirable. Such ver  To show improvements, the invention has become Task set.

Diese Aufgabe wird gelöst, indem das Einlaßorgan teil­ weise während des dem Verdichtungstakt vorausgehenden Ladungs-Ausschiebetaktes geöffnet ist. Diese Wirkungs­ weise soll im folgenden näher erläutert werden: Zeitlich direkt vor dem Verdichtungstakt erfolgt bei üblichen 4-Takt-Hubkolben-Brennkraftmaschinen der sog. Saugtakt, wobei der Kolben aus seiner oberen Totpunkt­ lage in seine untere Totpunktlage gefahren wird. Direkt vor diesem Saugtakt findet der Ladungs-Ausschiebetakt statt. Hierbei fördert der von seinem unteren Totpunkt in seinen oberen Totpunkt bewegte Kolben die im voran­ gegangenen Takt verbrannte Ladung über ein Auslaßorgan aus dem Zylinder bzw. Brennraum. Bei üblichen 4-Takt- Brennkraftmaschinen, bei denen die Ladungszufuhr bei­ spielsweise gesteuert durch ein Einlaßventil im wesent­ lichen während des Saugtaktes erfolgt, ist es auch bereits bekannt, mittels einer sog. Ventilüberschneidung - hierbei überdecken sich teilweise die Ventilöffnungs­ querschnitte des Einlaßventiles und des Auslaßventiles - die Rohemissionen zu verbessern. Dieses bekannte Ver­ fahren der Ventilüberschneidung ist jedoch auf eine nach einem Verfahren gemäß dem Oberbegriff des ersten Patent­ anspruches arbeitende Brennkraftmaschine nicht über­ tragbar. Daher schlägt die Erfindung vor, das Einlaß­ organ (zusätzlich) teilweise während des Ladungs-Aus­ schiebetaktes zu öffnen. Selbstverständlich genügt hierfür ein lediglich kurzzeitiges öffnen, da andern­ falls nahezu die gesamte auszuschiebende Ladung wieder in den Brennraum gelangen könnte. Es ist jedoch auch möglich, das Merkmal des teilweisen Offenhaltens durch gezielte geometrische Abstimmung zu realisieren. This problem is solved by part of the inlet organ wise during the pre-compression cycle Charge push-out cycle is open. This effect wise will be explained in more detail below: The time immediately before the compression cycle takes place at usual 4-stroke reciprocating internal combustion engines of the so-called. Suction stroke, taking the piston from its top dead center is moved to its bottom dead center position. Directly the charge ejection cycle takes place before this suction cycle instead of. This promotes from its bottom dead center pistons moved to its top dead center in advance burned charge over an outlet organ from the cylinder or combustion chamber. With usual 4-stroke Internal combustion engines in which the charge supply at for example controlled by an inlet valve in essence Lichen occurs during the suction cycle, it is also already known, by means of a so-called valve overlap - The valve opening partially overlap cross sections of the inlet valve and the outlet valve - improve raw emissions. This well-known ver driving the valve overlap is however after one a method according to the preamble of the first patent claim working internal combustion engine not portable. Therefore, the invention proposes the inlet organ (additionally) partly during the charge-off to open the sliding clock. Of course, it is enough just open it for a short time, as others if almost the entire load to be pushed out again could get into the combustion chamber. However, it is also possible to keep the trait partially to implement targeted geometric coordination.  

Mit dem erfindungsgemäßen Ladungswechselverfahren ergibt sich nicht nur eine Reduzierung der Rohemissionen in allen Betriebstemperaturen und Betriebspunkten, sondern es ist darüber hinaus auch eine Verbesserung der Leer­ laufqualität zu erwarten. Auch das Warmlaufverhalten und der gesamte Laufkomfort der Brennkraftmaschine werden verbessert. Auch ohne zusätzliche aufwendige Turbulenz­ maßnahmen oder Maßnahmen zur Restgasrückführung ist darüber hinaus eine Reduzierung des spezifischen Kraft­ stoffverbrauchs feststellbar.With the charge exchange method according to the invention results not only a reduction in raw emissions all operating temperatures and operating points, but it is also an improvement in emptiness running quality to be expected. Also the warm-up behavior and the overall running comfort of the internal combustion engine improved. Even without additional complex turbulence measures or measures to recycle residual gas furthermore a reduction in the specific force detectable material consumption.

Vorteilhafte Weiterbildungen beschreiben die Unteran­ sprüche. So ist in der Erkenntnis, daß es mit den bislang bekannten Betätigungsvorrichtungen für Einlaß­ organe einer Brennkraftmaschine nur sehr erschwert möglich ist, ein Einlaßorgan sowohl während des Saug­ taktes als auch während des darauffolgenden Verdich­ tungstaktes zu öffnen, vorgesehen, daß bei einer Brenn­ kraftmaschine mit zumindest zwei Einlaßorganen der Öff­ nungsbeginn des zweiten Einlaßorganges nahe vor oder nach dem oberen Kolben-Totpunkt liegt, wobei zumindest bei höheren Lastpunkten der Brennkraftmaschine die Öffnungsdauer des zweiten Einlaßorganges geringer ist als diejenige des ersten Einlaßorganges.Advantageous further developments describe the Unteran claims. So it is in the knowledge that it is with the previously known inlet actuators organs of an internal combustion engine only very difficult it is possible to have an inlet member both during suction tact as well as during the subsequent compression tungstaktes to open, provided that at a burning Engine with at least two inlet organs of the public transport Start of the second intake course close to or after top piston dead center, at least at higher load points of the internal combustion engine Opening time of the second intake organ is less than that of the first intake.

Stehen zwei Einlaßorgane, beispielsweise Hubventile, zur Verfügung, so ist es möglich, jedes dieser Einlaßorgane individuell zu betätigen, so daß auf einfache Weise eines der beiden Einlaßorgane die Funktion desjenigen nach dem unteren Totpunkt öffnenden Einlaßorganges übernehmen kann, während das andere Einlaßorgan für eine lediglich geringe Ladungszufuhr nahe vor oder nach dem oberen Kolben-Totpunkt sorgt. Zumindest in höheren Lastpunkten der Brennkraftmaschine soll dabei der Großteil der Ladung nahe des unteren Kolben-Totpunktes zugeführt werden, so daß dann die Öffnungsdauer des im Saugtakt öffnenden Einlaßorganes geringer ist als diejenige des später öffnenden Einlaßorganes. Zur vereinfachten bzw. optimierten Laststeuerung der Brenn­ kraftmaschine wird dabei vorteilhafterweise die Öff­ nungsdauer des ersten, nahe vor oder nach dem unteren Kolben-Totpunkt öffnenden Einlaßorganes verändert.Are two inlet members, such as globe valves, for Disposal, so it is possible each of these inlet organs to operate individually, so that in a simple manner one of the two inlet organs the function of that after the bottom dead center opening intake can take over while the other inlet organ for one only little charge supply close before or after top piston dead center. At least in higher ones Load points of the internal combustion engine should be the Most of the load near the bottom piston dead center are supplied so that the opening period of the im  Suction stroke opening inlet member is less than that of the later opening inlet member. To simplified or optimized load control of the burner Engine is advantageously the public duration of the first, close before or after the lower Piston dead center opening inlet member changed.

Zwar ist aus der DE-OS 29 01 186 ein Verbrennungsmotor mit zwei Brennraum-Einlaßorganen und mit variablen Steuerzeiten bekannt geworden, wobei die beiden Ein­ laßorgane zu unterschiedlichen Zeitpunkten geöffnet haben. Die individuelle Öffnungsdauer der einzelnen Einlaßorgane ist dabei jedoch in allen Betriebspunkten gleich. Wenn somit bei jenem bekannten Verbrennungsmotor das erste Einlaßorgan nahe vor oder nach dem unteren Kolben-Totpunkt und das zweite Einlaßorgan nahe vor oder nach dem oberen Kolben-Totpunkt öffnet, so vermag dieser Verbrennungsmotor nahezu keine Leistung abzugeben, da die durch das zweite Einlaßorgan eingebrachte Ladung während des Verdichtungstaktes durch das erste Einlaß­ organ wieder vollständig ausgeschoben wird. Dieser bekannte Verbrennungsmotor unterscheidet sich somit grundlegend von dem erfindungsgemäßen Ladungswechsel­ verfahren.DE-OS 29 01 186 is an internal combustion engine with two combustion chamber inlet elements and with variable ones Tax times have become known, the two one release organs open at different times to have. The individual opening time of each Intake organs are however in all operating points equal. If so with that known internal combustion engine the first inlet member near before or after the lower one Piston dead center and the second inlet member close to or opens after the top piston dead center, so this can Internal combustion engine to deliver almost no power because the charge introduced through the second inlet member during the compression stroke through the first inlet organ is pushed out completely again. This known internal combustion engine thus differs fundamentally from the charge change according to the invention method.

Ein Ausführungsbeispiel ist nicht gezeigt, da sich das erfindungsgemäße Ladungswechselverfahren mit sämtlichen bekannten Einlaßorganen verwirklichen läßt. Allgemein bieten sich elektromagnetisch, hydraulisch oder pneu­ matisch betätigte Einlaßorgane an. Im Falle zweier beispielsweise als Hubventile ausgebildete Einlaßorgane können diese von einer Nockenwelle gesteuert werden, die zwei Nocken pro Zylinder trägt, wobei die Lagen des maximalen Hubes um einen bestimmten Winkelabstand versetzt sind. Damit ergeben sich unterschiedliche Öffnungs-Einlaßorgan-Zeitpunkte zwischen den Einlaß­ organen des gleichen Brennraumes. Diese Unterschiede im Öffnungszeitpunkt können beispielsweise noch mit Hilfe einer zusätzlichen Nockenwellenverstellung variiert werden. Für die Veränderung der Öffnungsdauer der Einlaßorgane können dabei abermals hydraulische Vor­ richtungen zur Absteuerung des Ventilhubes zum Einsatz kommen.An embodiment is not shown because that Charge exchange method according to the invention with all can realize known inlet organs. General offer electromagnetic, hydraulic or pneumatic matically actuated inlet organs. In the case of two for example, inlet valves designed as lift valves can be controlled by a camshaft, the carries two cams per cylinder, the layers of the maximum stroke by a certain angular distance are offset. This results in different Opening inlet organ instants between the inlet  organs of the same combustion chamber. These differences in For example, you can still open the door with help an additional camshaft adjustment varies will. For changing the opening time of the Inlet organs can again hydraulic before directions for controlling the valve stroke are used come.

Claims (3)

1. Ladungswechsel-Verfahren für eine 4-Takt-Hubkol­ ben-Brennkraftmaschine mit zumindest einem Brenn­ raum-Einlaßorgan, worüber die Ladungszufuhr zum Zylinder im wesentlichen im Verdichtungstakt erfolgt, dadurch gekennzeichnet, daß das Einlaßorgan teil­ weise während des dem Verdichtungstakt voraus­ gehenden Ladungs-Ausschiebetaktes geöffnet ist.1. Charge change method for a 4-stroke Hubkol ben internal combustion engine with at least one combustion chamber inlet member, via which the charge is supplied to the cylinder essentially in the compression stroke, characterized in that the inlet member partially during the charge cycle preceding the compression stroke Push-out cycle is open. 2. Ladungswechselverfahren nach Anspruch 1 für eine mit zumindest zwei Brennraum-Einlaßorganen ver­ sehene Brennkraftmaschine, wobei der Öffnungsbeginn des ersten Einlaßorganes nahe vor oder nach dem unteren Kolben-Totpunkt liegt, dadurch gekennzeichnet, daß der Öffnungsbeginn des zweiten Einlaßorganes nahe vor oder nach dem oberen Kolben-Totpunkt liegt, wobei zumindest bei höheren Lastpunkten der Brennkraftmaschine die Öffnungs­ dauer des zweiten Einlaßorganes geringer ist als diejenige des ersten Einlaßorganes.2. Charge exchange method according to claim 1 for one ver with at least two combustion chamber inlet members seen internal combustion engine, the opening beginning of the first inlet member near before or after bottom piston dead center, characterized in that the opening of the second inlet member near before or after the upper one Piston dead center lies, at least at higher Load points of the internal combustion engine the opening duration of the second inlet member is less than that of the first inlet member. 3. Ladungswechselverfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zur Laststeuerung die Öffnungsdauer des nahe des unteren Kolben-Tot­ punktes öffnenden Einlaßorganes verändert wird.3. charge exchange method according to claim 1 or 2, characterized in that for load control Opening time of the near the bottom piston dead point opening inlet member is changed.
DE3926423A 1989-08-10 1989-08-10 Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke Withdrawn DE3926423A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3926423A DE3926423A1 (en) 1989-08-10 1989-08-10 Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3926423A DE3926423A1 (en) 1989-08-10 1989-08-10 Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke

Publications (1)

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DE3926423A1 true DE3926423A1 (en) 1991-02-14

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DE3926423A Withdrawn DE3926423A1 (en) 1989-08-10 1989-08-10 Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2722533A1 (en) * 1994-07-14 1996-01-19 Daimler Benz Ag EXHAUST GAS RECYCLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
WO2000071881A1 (en) * 1999-05-22 2000-11-30 Ford Global Technologies, Inc. Internal combustion engine
US6453856B1 (en) 1999-06-10 2002-09-24 Siemens Aktiengesellschaft Method for the load-controlling operation of electromagnetically activated intake valves of an internal combustion engine
EP1983176A1 (en) * 2007-04-17 2008-10-22 Peugeot Citroen Automobiles SA Method and system for cold start and idle of an internal combustion engine
DE102013020923A1 (en) * 2013-12-11 2015-06-11 Daimler Ag Piston engine and associated operating method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2722533A1 (en) * 1994-07-14 1996-01-19 Daimler Benz Ag EXHAUST GAS RECYCLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
WO2000071881A1 (en) * 1999-05-22 2000-11-30 Ford Global Technologies, Inc. Internal combustion engine
US6453856B1 (en) 1999-06-10 2002-09-24 Siemens Aktiengesellschaft Method for the load-controlling operation of electromagnetically activated intake valves of an internal combustion engine
EP1983176A1 (en) * 2007-04-17 2008-10-22 Peugeot Citroen Automobiles SA Method and system for cold start and idle of an internal combustion engine
FR2915246A1 (en) * 2007-04-17 2008-10-24 Peugeot Citroen Automobiles Sa METHOD AND SYSTEM FOR COLD STARTING AND IDLEING OF AN INTERNAL COMBUSTION ENGINE.
DE102013020923A1 (en) * 2013-12-11 2015-06-11 Daimler Ag Piston engine and associated operating method

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