DE2638651A1 - IC engine with additional exhaust valve cam - has exhaust valve re-activated during induction stroke - Google Patents

IC engine with additional exhaust valve cam - has exhaust valve re-activated during induction stroke

Info

Publication number
DE2638651A1
DE2638651A1 DE19762638651 DE2638651A DE2638651A1 DE 2638651 A1 DE2638651 A1 DE 2638651A1 DE 19762638651 DE19762638651 DE 19762638651 DE 2638651 A DE2638651 A DE 2638651A DE 2638651 A1 DE2638651 A1 DE 2638651A1
Authority
DE
Germany
Prior art keywords
exhaust valve
cam
additional cam
exhaust
additional
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.)
Pending
Application number
DE19762638651
Other languages
German (de)
Inventor
Franc Lopic
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19762638651 priority Critical patent/DE2638651A1/en
Publication of DE2638651A1 publication Critical patent/DE2638651A1/en
Pending 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
    • F02D13/0273—Multiple actuations of a valve within an engine cycle
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F02D13/0242—Variable control of the exhaust valves only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/0228—Adding fuel and water emulsion
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • 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)
  • Valve Device For Special Equipments (AREA)

Abstract

The engine works on the conventional four stroke principle. The valve cam shaft has an additional cam to actuate the exhaust valve during the inlet stroke. The purpose of the additional cam is to cause exhaust gas to be drawn back into the combustion chamber. The additional cam (3) opens the exhaust valve shortly before the piston reaches BDC induction stroke. The exhaust valve closes simultaneously with the inlet valve. The free angle between main exhaust cam (2) and the additional cam (3) is = 80 degrees. The additional cam actuating angle is = 50 degrees. A water coil emulsion may be injected in the close proximity of the exhaust valve outside the cylinder. The injection takes place before and during the re-opening phase.

Description

Explosionsmotor mit einer drehbaren NockenwelleExplosion engine with a rotating camshaft

Die Erfindung betrifft einen Viertakt-Verbrennungsmotor, der für sieden Zylinder eine Ansaugleitung mit einer Ansaugöffnung und einem Ansaugventil; und eine Auspuffleitung mit einer Auspufföffnung und einem Auspuffventil aufeist und der mit einer Einrichtung zur Zuführung von Luft und von Treibstoff in die Ansaugleitung versehen ist.The invention relates to a four-stroke internal combustion engine for boiling Cylinder an intake pipe with an intake port and an intake valve; and an exhaust pipe with an exhaust port and an exhaust valve and the one with a device for supplying air and fuel into the intake line is provided.

Ein solcher Verbrennungsmotor kann Mittel enthalten, die nur minimale Mengen und Kozentrationen von Stickstoffoxyden (NOx) Kohlenmonoxyden (CO) und unverbrannten Kohlenwasserstoffen (HC) bei minimalem Kraftstoffverbrauch produzieren. Der Motor wird bei Niederbelastungs- und Hochbelastungszuständen mit einem mageren Luft/Treibstoffgemisch hetriehen, wodurch der Ausstoss der vorstehend genannten Verureinigungen minimalisiert wird.Such an internal combustion engine can contain resources that are only minimal Amounts and concentrations of nitrogen oxides (NOx), carbon monoxides (CO) and unburned Produce hydrocarbons (HC) with minimal fuel consumption. The motor is used in low-load and high-load conditions with a lean air / fuel mixture hetriehen, which minimizes the emission of the aforementioned pollutants will.

Die Verbrennung von mageren Gemischen bei Niederbelastungszuständen wird durch Mittel und Methoden ermöglicht, mit denen ein creeiqneter niederer numerischer wert des Riickstandsbruches geschaffen wird, der als Verhältnis zwischen der Menge der im Zylinder verbliebenen Gasrückstände und der Gesamtmenge der Gasrückstände im angesaugtem verbranntem Gas und der frisch in den Zylinder strnmenden Gase definiert wird.The combustion of lean mixtures under low load conditions is made possible by means and methods with which a creeiqneter lower numerical value of the residual fraction is created, which is the ratio between the quantity the residual gas remaining in the cylinder and the total amount of residual gas defined in the sucked in burned gas and the gases freshly flowing into the cylinder will.

Der Aus stops von Verunreinigungen infolae höheren Kraftstoffverbrauches hei Betrieb von Verhr ennuna smotor en ist zu einer Sache von ernsten gesellschaftlichen Unruhen aeworden. Rs werden zunehmend strenqe ReschrFinkunaen fiir diese Luftverunreinigungen erlassen, und es werden dringend Motoren aehraucht, die die neuen Vorschriften erfüllen. Die heste Lösung wird so eine sein, bei welcher wesentliche Teile der bestehenden Technologie und der Werkzeuge verwendet werden können und welche für Motoren der gegenwärtigen Konstruktion verwendet werden kann, ohne dass radikale Änderungen notwendig sind.The stop of impurities infolae higher fuel consumption When the operation of Verhr ennuna smotor en has become a matter of serious social Unrest. Rs are becoming increasingly strict regulations for these air pollutants and there is an urgent need to smoke engines that comply with the new regulations. The best solution will be one in which essential parts of the existing Technology and the tools that can be used and which for engines of the current design can be used without making radical changes are necessary.

Es ist eine Aufqabe der Erfinduncr fiir eine Lösung fiir das Problem des Ausstosses von Verunreinigungen und Verbrauch des Brennstoffes zu sorgen, bei welcher ein wesentlicher Teil der hestehenden Technoloqie verwendet werden kann und welche hei Verwendung in einigen oder sogar den meisten konventionellen Verbrennungsmotoren nur relativ kleine Veränderungen und Konstruktionen notwendia macht.It is an object of the invention to find a solution to the problem to ensure the emission of impurities and consumption of the fuel which a substantial part of the existing technology can be used and which are used in some or even most conventional internal combustion engines only makes relatively small changes and constructions necessary.

Es ist Aufgabe der Erfindung Verbrennungsmotoren und Verfahren zum Betrieb dieser Verbrennungsmotoren zu schaffen, mit denen der Verbrauch des Brennstoffes und Ausstoss von Verunreinigungen, sneziell von Stickstoffoxyden (NOx), minimalisiert wird.It is the object of the invention internal combustion engines and methods for Operation of these internal combustion engines to create with which the consumption of fuel and emissions of pollutants, especially nitrogen oxides (NOx), are minimized will.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Auspuffleitung einer dem Auspuffventil in Ansaugtakt geöffnet wird, wobei dieses Auspuffventil in bestimmter Zeit die Strömung der Auspuffgase zurück in die Zylinder ermöglicht. Es hat sich herausgestellt, daß sich die Rückführung eines Teils der Auspuffgase in den verbrennunasraum vorteilhaft auf den Ausstoss von MOx auswirkt.According to the invention, this object is achieved in that the exhaust line one of the exhaust valve is opened in the intake stroke, this exhaust valve allows the exhaust gases to flow back into the cylinders within a certain period of time. It has been found that the recirculation of part of the exhaust gases in the combustion chamber has a beneficial effect on MOx emissions.

Diese einfache Ausführungsform kann dadurch erzielt werden, dass die Nockenwelle eine Zusatznocke aufweist, die das Auspuffventil in Ansaugtakt in und für hestimmte Zeit nffnet.This simple embodiment can be achieved in that the Camshaft has an additional cam that the exhaust valve in and intake stroke opens for a certain time.

nie Erfindung wird in einer Zeichnung nRher erläutert und zwar zeigt: Fiq. 1 eine Draufsicht auf eine erfindungsgemäße Ausführungsform der Nockenwelle eines Motors.The invention is never explained in more detail in a drawing, which shows: Fiq. 1 shows a plan view of an embodiment of the camshaft according to the invention of an engine.

In der Fig. 1 ist eine Ausführungsform der Erfindungen angezeigt: Wie aus der Fig. ersichtlich, enthält die Nockenwelle 1, bekannte Hauntnocke 2 zum Steuern der Auspuffventilen. Neben Hauntnocke 2 ist eine Zusatznocke 3 angebracht, die das Ausnuffventil in Ansaugtakt bei hestimmten Zeiten für hestimmte Zeit öffnet.In Fig. 1, an embodiment of the invention is indicated: As can be seen from the figure, contains the camshaft 1, known Hauntnocke 2 for Controlling the exhaust valves. Next to Hauntnocke 2 an additional cam 3 is attached, which opens the exhaust valve in the intake stroke at certain times for a certain time.

Das Ausnuffqas strömt zurück in den Zylinder, dabei vermischt und vermengt sich dieses mit brennbarem ras und fühlt den Zylinder zusätzlich auf, so daß es im unteren Drehzahlbereich des Motors zu einem höheren Endkompresionsdruck kommt.The exhaust gas flows back into the cylinder, mixed and if this mixes with combustible ras and feels the cylinder additionally, like this that there is a higher final compression pressure in the lower speed range of the engine comes.

Claims (6)

Patentansprüche: 1. Explosionsmotor mit einer drehbaren Nockenwelle und Hauntnocken zur Steuerung der Ansauqventile und Ausnuffventile auf bekannte art und weise, einem im Zylinder hin und her begrenzt beweglichen Kolben, dadurch aekennzeichnet, daß die drehbare Nockenwelle (1) eine nach der Ilauptnocke (2), die das Auspuffventil steuert, eine Zusatznocke (3) aufweist, die das Auspuffventil, vor dem Schließen des Ansaugventiles und bei Stellung des Kolhens kurz vor Erreichen des unteren Totnunktes öffnet, und daß bei Stelluna des Kolbens kurz nach verlassen des unteren Totnunktes fast gleichzeitig mit dem Ansaugventil schließt.Claims: 1. Explosion engine with a rotatable camshaft and haunt cams for controlling the intake valves and exhaust valves on known ones way, a piston that can move back and forth to a limited extent in the cylinder a designates that the rotatable camshaft (1) one after the Ilauptnocke (2), which controls the exhaust valve, has an additional cam (3) that controls the exhaust valve, before closing the suction valve and when the piston is in position shortly before it is reached of the lower dead point opens, and that at Stelluna the piston left shortly after of the lower dead point closes almost simultaneously with the suction valve. 2. Explosionsmotor mit einer drehbaren Nockenwelle nach Anspruch 1, dadurch gekennzeichnet, daß der freie Winkel (i), zwischen der Hauptnocke (2) und Zusatznocke (3), nach dem Schließen an der Hauntnocke (2) und vor der Wiederbetätigung des Auspuffventiles durch die Zusatznocke (3), kleiner als 8n0 ist.2. Explosion engine with a rotatable camshaft according to claim 1, characterized in that the free angle (i) between the main cam (2) and Additional cam (3), after closing on the haunt cam (2) and before re-actuation of the exhaust valve through the additional cam (3) is smaller than 8n0. 3. Explosionsmotor mit einer drehbaren Nockenwelle nach Anspruch 1, dadurch gekennzeichnet, daß der Betätigungswinkel (@) der Zusatznocke (3), die das Auspuffventil entsprechend lang offen hält, kleiner als 5fl0 ist.3. Explosion engine with a rotatable camshaft according to claim 1, characterized in that the operating angle (@) of the additional cam (3), which the Keeps the exhaust valve open for a correspondingly long time, is less than 5fl0. 4. Explosionsmotor mit einer drehbaren Nockenwelle nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Betätigungshub der Zusatznocke (3), die das Auspuffventil nffnet und schließt, kleiner als der Betätigungshub der Hauntnocke (2) ist.4. Explosion engine with a rotatable camshaft according to claim 1 to 3, characterized in that the actuation stroke of the additional cam (3) that the Exhaust valve opens and closes smaller than the actuation stroke of the haunt cam (2) is. 5. Explosionsmotor mit einer drehbaren Nockenwelle nach Anspruch 1 bis 4 dadurch gekennzeichnet, daß vor und während des nffnens des Auspuffventiles durch die Zusatznocke (3) ein flfissiaes Mittel in der Enge Nahe des Auspuffventiles, außerhalb des Zylinders, zum Auspuffaas eingespritzt und im Zylinder anaesaugt wird.5. Explosion engine with a rotatable camshaft according to claim 1 to 4 characterized in that before and during the opening of the exhaust valve through the additional cam (3) a flfissiaes means in the close proximity of the exhaust valve, is injected outside the cylinder, to the exhaust and sucked into the cylinder. 6. Exnlosionsmotor mit einer drehbaren Nockenwelle nach Anspruch 1 bis 5 dadurch gekennzeichnet, daß das flüssige Mittel nicht brennbare Stoffs wie Wasser, leichtes nl oder Emulsion der beiden Stoffen werden kann.6. Explosion engine with a rotatable camshaft according to claim 1 to 5 characterized in that the liquid agent such as non-flammable material Water, light nl or emulsion of the two substances can be used.
DE19762638651 1976-08-27 1976-08-27 IC engine with additional exhaust valve cam - has exhaust valve re-activated during induction stroke Pending DE2638651A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762638651 DE2638651A1 (en) 1976-08-27 1976-08-27 IC engine with additional exhaust valve cam - has exhaust valve re-activated during induction stroke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762638651 DE2638651A1 (en) 1976-08-27 1976-08-27 IC engine with additional exhaust valve cam - has exhaust valve re-activated during induction stroke

Publications (1)

Publication Number Publication Date
DE2638651A1 true DE2638651A1 (en) 1978-03-02

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448032A1 (en) * 1979-02-05 1980-08-29 Semt PROCESS FOR IMPROVING THE EFFICIENCY OF AN INTERNAL COMBUSTION ENGINE, ESPECIALLY SUPERCHARGED
FR2512496A1 (en) * 1981-09-10 1983-03-11 Semt METHOD FOR THE AMENAGEMENT OF THE OPERATING CONDITIONS OF AN INTERNAL COMBUSTION ENGINE AND A MOTOR THUS DONE
WO1985005654A1 (en) * 1984-05-29 1985-12-19 Schuele Peter Four-stroke combustion engine with a device for conveying gases from an exhaust gas pipe back into the combustion chamber
EP1191211A2 (en) 2000-09-21 2002-03-27 AVL List GmbH Method for operating an internal combustion engine
US7311072B2 (en) 2004-07-17 2007-12-25 Mahle Ventiltrieb Gmbh Control unit for a valve, especially a gas exchange valve of an internal combustion engine
WO2012025662A1 (en) * 2010-08-26 2012-03-01 Wärtsilä Finland Oy Method for reducing emissions of an internal combustion engine and internal combustion engine
DE102017124935A1 (en) 2017-10-25 2019-04-25 Volkswagen Aktiengesellschaft Method for operating an internal combustion engine, internal combustion engine and motor vehicle

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448032A1 (en) * 1979-02-05 1980-08-29 Semt PROCESS FOR IMPROVING THE EFFICIENCY OF AN INTERNAL COMBUSTION ENGINE, ESPECIALLY SUPERCHARGED
EP0015791A1 (en) * 1979-02-05 1980-09-17 Societe D'etudes De Machines Thermiques S.E.M.T. Method and device for improving the efficiency of an internal-combustion engine, in particular a supercharged one
FR2512496A1 (en) * 1981-09-10 1983-03-11 Semt METHOD FOR THE AMENAGEMENT OF THE OPERATING CONDITIONS OF AN INTERNAL COMBUSTION ENGINE AND A MOTOR THUS DONE
EP0075502A1 (en) * 1981-09-10 1983-03-30 Societe D'etudes De Machines Thermiques S.E.M.T. Method of adapting an internal-combustion engine to its working conditions and engine adapted in this manner
WO1985005654A1 (en) * 1984-05-29 1985-12-19 Schuele Peter Four-stroke combustion engine with a device for conveying gases from an exhaust gas pipe back into the combustion chamber
EP1191211A2 (en) 2000-09-21 2002-03-27 AVL List GmbH Method for operating an internal combustion engine
US7311072B2 (en) 2004-07-17 2007-12-25 Mahle Ventiltrieb Gmbh Control unit for a valve, especially a gas exchange valve of an internal combustion engine
WO2012025662A1 (en) * 2010-08-26 2012-03-01 Wärtsilä Finland Oy Method for reducing emissions of an internal combustion engine and internal combustion engine
CN103080507A (en) * 2010-08-26 2013-05-01 瓦锡兰芬兰有限公司 Method for reducing emissions of an internal combustion engine and internal combustion engine
CN103080507B (en) * 2010-08-26 2015-12-02 瓦锡兰芬兰有限公司 For reducing method and the internal-combustion engine of the discharge of internal-combustion engine
DE102017124935A1 (en) 2017-10-25 2019-04-25 Volkswagen Aktiengesellschaft Method for operating an internal combustion engine, internal combustion engine and motor vehicle

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