DE2450953A1 - METHOD OF OPERATING A FOUR-STROKE COMBUSTION ENGINE - Google Patents

METHOD OF OPERATING A FOUR-STROKE COMBUSTION ENGINE

Info

Publication number
DE2450953A1
DE2450953A1 DE19742450953 DE2450953A DE2450953A1 DE 2450953 A1 DE2450953 A1 DE 2450953A1 DE 19742450953 DE19742450953 DE 19742450953 DE 2450953 A DE2450953 A DE 2450953A DE 2450953 A1 DE2450953 A1 DE 2450953A1
Authority
DE
Germany
Prior art keywords
fuel
intake
valve
injection
combustion 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.)
Ceased
Application number
DE19742450953
Other languages
German (de)
Inventor
Hiromitsu Matsumoto
Ryuichi Yamashita
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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
Priority claimed from JP49059151A external-priority patent/JPS50149808A/ja
Priority claimed from JP49073546A external-priority patent/JPS6029823B2/en
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of DE2450953A1 publication Critical patent/DE2450953A1/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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
    • F02P5/10—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure
    • F02P5/103—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure dependent on the combustion-air pressure in engine
    • 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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/26—Construction of thermal reactors
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/08—Engines characterised by fuel-air mixture compression with positive ignition with separate admission of air and fuel into cylinder
    • F02B1/10—Methods of operating
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • 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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/04—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling being auxiliary carburetting apparatus able to be put into, and out of, operation, e.g. having automatically-operated disc valves
    • F02M1/046—Auxiliary carburetting apparatus controlled by piston valves
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • 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
    • F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
    • 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
    • F02M26/44—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 in which a main EGR passage is branched into multiple 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/58—Constructional details of the actuator; Mounting thereof
    • 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
    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/08—Other details of idling devices
    • F02M3/12—Passageway systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/045—Fuel-air mixture
    • 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
    • F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
    • F02M33/02—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel
    • F02M33/04—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel returning to the intake passage
    • 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
    • F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
    • F02M33/02—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel
    • F02M33/04—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel returning to the intake passage
    • F02M33/06—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel returning to the intake passage with simultaneous heat supply
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/043—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit upstream of an air throttle valve
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • F02M7/14—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle
    • F02M7/16—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis
    • F02M7/17—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel spray nozzle operated automatically, e.g. dependent on exhaust-gas analysis by a pneumatically adjustable piston-like element, e.g. constant depression carburettors
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/08—Engines characterised by fuel-air mixture compression with positive ignition with separate admission of air and fuel into 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
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/002—EGR valve being controlled by vacuum or overpressure
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/27—Layout, e.g. schematics with air-cooled heat exchangers
    • 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

Description

Patentanwalt Dip!. In-;. H. J. HiibnerPatent attorney Dip !. In-;. H. J. Hiibner

nerner

8963 Kcrr-pien/A!!q.8963 Kcrr-pien / A !! q.

Lindauer Str. 52 · Teleion 0831/23291Lindauer Str. 52 Teleion 0831/23291

2 5. 10. 19742 October 5, 1974

XX

VERFAHREN ZUM BETRIEB EIIiES VIERTAKT-VERBRENNUNGSMOTORESMETHOD OF OPERATING A FOUR-STROKE COMBUSTION ENGINE

Die Erfindung betrifft eine Methode zum Betrieb eines Viertakt-Verbrennungsmotores, bei dem in der Ansaugleitung für jeden Zylinder ein Treibstoff-Einspritzhahn angeordnet ist.The invention relates to a method for operating a four-stroke internal combustion engine, in which a fuel injection valve is arranged in the intake line for each cylinder.

509850/0635509850/0635

245G953245G953

Bei den bekannten Viertakt-Verbrennungsmotoren die einen Einspritzhahn in der Ansäugleitung aufweisen, wird der Treibstoff normalerweise während der Oeffnungszeit des Ansaugventils eingespritzt. Auf diese Weise wird der Treibstoff vom Einspritzhahn ueber das Ansaugventil direkt in den Zylinder eingespritzt, wobei der groesste Teil des Treibstoffes in Form von relativ grossen Troepfchen in den Verbrennungsraum stroemt. Auf Grund dieser Erscheinung ist die Zusammensetzung des Gemisches im Verbrennungsraum sehr unregelmaessig was zu einer schlechteren Zuendbarkeit und Verbrennung des Gemisches fuehrt, sodass ein unerwuenscht hoher Ausstoss von Verunreinigungen, speziell Kohlenmonoxyd und unverbranntö Kohlenwasserstoffe, erfolgt. Um sicher zu gehen, dass eine Zuendung erfolgt, muss ein reiches Gemisch verwendet werden.The known four-stroke internal combustion engines have an injection valve in the intake line, the fuel will normally injected during the opening time of the suction valve. In this way the fuel is from the injection valve via the suction valve injected directly into the cylinder, with most of the fuel in the form of relatively large droplets in the combustion chamber flows. Due to this phenomenon, the composition of the mixture in the combustion chamber is very irregular, which makes it difficult to ignite and combustion of the mixture leads, so that an undesirably high emission of impurities, especially carbon monoxide and unburned Hydrocarbons. To make sure that a spark a rich mixture must be used.

Es ist eine Aufgabe der Erfindung ein Verfahren zu schaffen, mit dem eine gute Zuendung und Verbrennung des Gemisches sichergestellt ist und mit dem der Ausstoss von Verunreinigungen minimalisiert werden kann.It is an object of the invention to provide a method with which one good ignition and combustion of the mixture is ensured and with which the emission of impurities can be minimized.

Erfindungsgemaess wird die Aufgabe dadurch geloest, dass die Einspritzung von Treibstoff aus dem Einspritzhahn waehrend des groesaten Teils der Zeit, in der das Ansaugventil waehrend des Ansaugtaktes geoeffnet ist, unterlassen wird.According to the invention, the object is achieved in that the injection of fuel from the fuel injector during most of the Time in which the intake valve is open during the intake stroke, is omitted.

Auf diese Weise wird im Gegensatz zum ueblichen Verfahren nicht in die Ansaugleitung gespritzt wenn das Ansaugventil offen ist, sondern der Treibstoff wird hauptsaechlich bei geschlossenem Ansaugventil in die Anaaugleitung gespritzt. Es hat sich gezeigt, dass der Treibstoff aufIn this way, in contrast to the usual procedure, the Intake line injected when the intake valve is open, but the fuel is mainly into the when the intake valve is closed Injected suction line. It has been shown that the fuel is on

509850/0635509850/0635

diese Yieise genuegend Zeit hat, um in der relativ warmen Ansaugleitung zu verstaeuben, sodass ein relativ homogenes Gemisch in den Verbrennungsraum eingefuehrt wird. Bin solches homogenes Gemisch verbessert die Zuendbarkeit und die Verbrennbarkeit, sodass eine minimale Menge von Verunreinigungen ausgestossen wird.this yieise has enough time to sit in the relatively warm intake pipe to collect dust so that a relatively homogeneous mixture is introduced into the combustion chamber. Such a homogeneous mixture improves flammability and combustibility, so a minimal amount of impurities is expelled.

Vorzugsweise wird die Einspritzung von Treibstoff aus dem Einspritzhahn ;vaehrend einer Zeitdauer unterlassen, die sich ueber einen Bereich von etwa 30° bis etwa 150 nach dem oberen Totpunkt des Ansaugtaktes erstreckt. Auf diese Weise wird am Anfang und am Ende der Oeffnungszeit des Ansaugventils Treibstoff eingespritzt, wobei aber waehrend dieser Einspritzze.it das Ansaugventil nur wenig geoeffnet ist, sodass der vorteilhafte Effekt der erfindungsgemaessen Methode nicht beeintraechtigt wird. Es hat sich gezeigt, dass diese Methode auch bei Verwendung eines mageren Gemisches mit einem Luft/Treibstoffverhaeltnis von mehr als 15 wirksam ist und bei einem mageren Gemisch eine gute Zuendung und Verbrennung garantiert .The injection of fuel is preferably carried out from the injection valve ; always refrain from a period of time that extends over a range of about 30 ° to about 150 after top dead center of the intake stroke. In this way, at the beginning and at the end of the opening time of the suction valve Fuel injected, but during this injection the intake valve is only slightly open, so that the beneficial effect the method according to the invention is not impaired. It has been shown that this method works well when using a lean mixture is effective with an air / fuel ratio greater than 15 and good ignition and combustion guaranteed with a lean mixture.

Somit koennen bei Verwendung eines mageren Gemisches und durch.Anwendung des erfindungsgemaessen Verfahrens beim Betrieb eines Verbrennungsmotors saubere Auspuffgase erhalten werden. Speziell wenn die Auspuffgase noch durch einen Auspuffgasreaktor gefuehrt werden, ist der Ausstoss von Verunreinigungen vernachlaessigbar gering.Thus, when using a lean mixture and through.Application of the method according to the invention when operating an internal combustion engine clean exhaust gases are obtained. Especially when the exhaust gases are still led through an exhaust gas reactor, the emission of impurities negligibly low.

Die Zerstaeubung des Treibstoffes kann noch verbessert werden, wenn .die Wandtemperatur der Ansaugleitung etwa zwischen 90° Celsius und 135° Celsius gehalten wird.The atomization of the fuel can be improved if .the Wall temperature of the suction line is kept between approximately 90 ° Celsius and 135 ° Celsius.

609850/0635609850/0635

Die Erfindung wird nun anhand der sie beispielsweise wiedergebenden Zeichnung . naeher erlaeutert werden, wobei die Zeichnung einen Teilschnitt durch einen erfindungsgemaessen Verbrennungsmotor zeigt.The invention will now be illustrated by way of example Drawing. will be explained in more detail, the drawing being a partial section shows by an internal combustion engine according to the invention.

Wie aus der Figur ersichtlich ist, enthaelt ein Viertakt-Verbrennungsmotor 10 eine oder mehrere Verbrennungsraeume 11b. Der Ausdruck "Zylinder" wird manchmal gleichbedeutend mit dem Ausdruck "Verbrennungsraum" verwendet. Der Motor 10 ist mit einem Drosselklappenventil 32 und mit einem Treibstoffeinspritzhahn 20 fuer jeden Verbrennungsraum versehen, wobei der Einspritzhahn 20 jeweils hinter dem Drosselklappenventil 32 in eine Ansaugleitung 12b muendet. Die Ansaugleitung 12b ist mit einer Ansaugoeffnung 15b des Verbrennungsräumeβ 11b verbunden.As can be seen from the figure, it contains a four-stroke internal combustion engine 10 one or more combustion chambers 11b. The term "cylinder" is sometimes used synonymously with the term "combustion chamber". The engine 10 is provided with a throttle valve 32 and with a Fuel injection valve 20 provided for each combustion chamber, wherein the injection valve 20 in each case downstream of the throttle valve 32 in a Intake line 12b opens. The suction line 12b is provided with a suction opening 15b of the combustion chamber 11b connected.

Eine Auspuffleitung 14 ist.mit einer Auspuffoeffnung 16b des Verbrennungsraumes 11b verbunden und nimmt die aus dem Verbrennungsraum 11b ausgestossenen Auspuffgase auf · Die Auspuffleitung 14 ist mit einem Auspuffsystem verbunden, das einen Auspuffgasreaktor enthaelt.An exhaust line 14 is connected to an exhaust opening 16b of the combustion chamber 11b and receives the exhaust gas discharged from the combustion chamber 11b Exhaust gases on · The exhaust pipe 14 has an exhaust system connected, which contains an exhaust gas reactor.

Ein Ansaugventilsitz 18 umgibt die Ansaugoeffnung 15b ,waehrend ein Auspuff ventilsitz 18a die Auspuffoeffnung 16b umgibt. Ein Ansaugventil 21 und ein Auspuffventil 22 ist hin-und her verschiebbar im Zylinderkopf angeordnet und sind so ausgebildet, dass sie bei einer Bewegung gegen den Ventilsitz die jeweilige Oeffnung versohliessen und bei einer Bewegung vom Ventilsitz weg die jeweilige Oeffnung freigeben. An einer Nockenwelle 81 und 82 sind jeweils Nocken 81a und 82a angeordnet, die zum Oeffnen der Ventile dienen, waehrend die Schliessung der Ventile ueber Federn erfolgt, wenn die Ventile,nioht von den Nocken 81a und 82a offen-An intake valve seat 18 surrounds the intake opening 15b while a Exhaust valve seat 18a surrounds the exhaust opening 16b. A suction valve 21 and an exhaust valve 22 is displaceable back and forth in the cylinder head arranged and designed so that they close the respective opening when moving against the valve seat and when moving release the respective opening away from the valve seat. On a camshaft 81 and 82 are cams 81a and 82a, respectively, which serve to open the valves while the valves are closed Springs takes place when the valves are not open by cams 81a and 82a.

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gehalten werden«being held"

Im Zylinderkopf H ist ein Kuehlmantel C angeordnet, der die Auspuffleitung 14 und den Verbrennungsraum 11b kuehlt. Ein Abschnitt 17, der sich vom Ansaugventilsitz 18 ueber einen Teil der Ansaugleitung 12b erstreckt,wird vom Kuehlmantel C nicht gekuehlt,sondern von der Waerme vom Verbrennungsraum 11ΐ;aus den nachstehend beschriebenen Gruenden^erhitzt. Dieser Abschnitt 17 kann sogar nach aussen isoliert oder mit einem Waermemantel versehen werden, um eine Temperatur von etwa 90 Celsius bis 135 Celsius beizubehalten.In the cylinder head H a cooling jacket C is arranged, which the exhaust line 14 and the combustion chamber 11b cools. A section 17 extending from Suction valve seat 18 extends over part of the suction line 12b not cooled by the cooling jacket C, but by the heat from the combustion chamber 11ΐ; heated for the reasons described below. this section 17 can even be insulated from the outside or provided with a thermal jacket, to a temperature of about 90 Celsius to 135 Celsius to maintain.

Der Absohnitt 17 erstreckt sich vorzugsweise ueber eine Distanz von mindestens 60 bis 70 mm vom Ansaugventilsitz in Richtung der Drosselklappe . Die Wandung des Abschnitts 17 iat thermisch mit dem Zylinderkopf verbunden, das heisst, die Innenwandung 19 der Ansaugleitung 12b wird durch Waerme erhitzt, die aus der Verbrennungsraumkuppel abgeleitet wird. Jedes Kuehlmittel sollte ausreichend weit vom Absohnitt 17 entfernt angeordnet werden, damit die Innenwandung 19 die notwendige Temperatur erreicht. Im Zylinderkopf H ist ein Teil C1 des Kühlmantels C ueber der Ansaugoeffnung 15b gezeigt. In fluessigkeitsgekuehlten Verbrennungsmotoren sollte sich der Kuehlmantel auf diese Seite des Zylinder-, kopfes erstrecken, aber es ist nicht erwuenscht, dass dadurch der Abschnitt 17 gekuehlt .wird. Dementsprechend ist zwischen dem Kuehlmantelteil C1 des Kühlmantels C und der Innenwandung 19 der Ansaugleitung 12b eine ausreichend dicke Materialachioht angeordnet, damit sioh die Ιχχηβη-wandung 19 ausreichend stark erhitzen kann. Der Absohnitt 17 bildet eineThe Absohnitt 17 extends preferably over a distance of at least 60 to 70 mm from the intake valve seat in the direction of the throttle valve . The wall of section 17 is thermally connected to the cylinder head connected, that is, the inner wall 19 of the suction line 12b is heated by heat drawn off from the combustion chamber dome. Any coolant should be kept well enough away from Section 17 be arranged so that the inner wall 19 reaches the necessary temperature. A part C1 of the cooling jacket C is in the cylinder head H shown above the suction opening 15b. In liquid-cooled internal combustion engines the cooling jacket should extend to this side of the cylinder head, but it is not desirable that the section 17 is cooled. Accordingly, there is between the cooling jacket part C1 of the cooling jacket C and the inner wall 19 of the suction line 12b have a sufficiently thick material layer arranged so that the Ιχχηβη wall is sioh 19 can heat up sufficiently. The Absohnitt 17 forms one

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Zerstäubungseinrichtung um fluessigen Treibstoff, der sich eventuell an dar Innenwandung 19 der Ansaugleitung 12b niedergeschlagen hat, wieder zu zerstaeuben .Atomizing device around liquid fuel, which may or may not be on the inner wall 19 of the suction line 12b has precipitated, again to atomize.

Waehrend des normalen Betriebs des Verbrennungmotors wird mittels des Einspritzhahns 20 Treibstoff in die Ansaugleitung 12b eingespritzt . Ueber eine Periode, die sich Über einen Bereich von etwa 30 bis 150 nach dem oberen Totpunkt des Ansaugtaktes erstreckt, wird aber das Einspritzen von Treibstoff unterlassen. Auf diese Weise wird nur bei geschlossenem oder nahezu geschlossenem Ansaugventil 21 Treibstoff in die Ansaugleitung 12b eingespritzt, wodurch eine gute Zerstaeubung des Treibstoffes in der Ansaugleitung 12b erfolgt, bevor das Ansaugventil geoeffnet wird.During normal operation of the internal combustion engine, the Injection valve 20 injected fuel into the suction pipe 12b. Over a period that ranges from about 30 to 150 extends after top dead center of the intake stroke, but the injection of fuel is omitted. This way it will only be at closed or almost closed suction valve 21 fuel is injected into the suction line 12b, whereby a good atomization of the fuel takes place in the suction line 12b before the suction valve opens will.

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Claims (1)

PATENTANSPRÜCHEPATENT CLAIMS Verfahren zum Betrieb eines Viertak-Verbrennungsmotores bei dem in der Ansaugleitung fuer Jeden Zylinder ein Treibstoffeinspritzhahn angeordnet ist, dadurch gekennzeichnet, dass die Einspritzung von Treib« stoff aus dem Einspritzhahn waehrend des groessten Teile der Zeit, in der das Ansaugventil waehrend des Ansaugtaktes geoeffnet"ist, unterlassen wird.Method for operating a four-stroke internal combustion engine in which a fuel injection valve is arranged in the intake line for each cylinder, characterized in that the injection of fuel from the injection valve during most of the time in which the intake valve is open during the intake stroke , is omitted. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Einspritzung von Treibstoff aus dem Einspritzhahn waehrend eines Zeitraumes , der sich zwischen etwa 30 bis etwa 150 nach dem oberen Totpunkt des Ansaugtaktes erstreckt, unterlassen wird.The method according to claim 1, characterized in that the injection of fuel from the injection valve for a period of time which is between about 30 and about 150 after top dead center of the intake stroke extends, is omitted. Verfahren nach den Anspruechen 1 oder 2, dadurch gekennzeichnet, dass die Wandtemperatur der Ansaugleitung zwischen 90 Celsius und 135 Celsius. gehalten wird.Method according to claims 1 or 2, characterized in that the wall temperature of the suction line between 90 Celsius and 135 Celsius. is held. Verfahren nach einem oder mehreren der Ansprueche 1 bis 3 , dadurch gekennzeichnet, dass ein Gemisch mit einem Luft/Treibstoffverhaeltnie von mehr als 15 verwendet wird.Method according to one or more of claims 1 to 3 , characterized in that a mixture with an air / fuel ratio of more than 15 is used. Verfahren nach einem oder mehreren der Ansprueche 1 bis 4, dadurch gekennzeichnet, daas die Auspuffgase durch einen Auspuffgasreaktor gefuehrt werden.Method according to one or more of claims 1 to 4, characterized in that that the exhaust gases are passed through an exhaust gas reactor will. 6O98S0/O63S6O98S0 / O63S -f.-f. LeerseifeEmpty soap
DE19742450953 1974-05-24 1974-10-26 METHOD OF OPERATING A FOUR-STROKE COMBUSTION ENGINE Ceased DE2450953A1 (en)

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JP49059151A JPS50149808A (en) 1974-05-24 1974-05-24
JP49073546A JPS6029823B2 (en) 1974-06-26 1974-06-26 multi-cylinder internal combustion engine
US49614274A 1974-08-12 1974-08-12

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DE19742450953 Ceased DE2450953A1 (en) 1974-05-24 1974-10-26 METHOD OF OPERATING A FOUR-STROKE COMBUSTION ENGINE
DE19742451068 Withdrawn DE2451068A1 (en) 1974-05-24 1974-10-26 METHOD FOR IMPROVING THE PERFORMANCE OF A FOUR-STROKE COMBUSTION ENGINE
DE19742451064 Withdrawn DE2451064A1 (en) 1974-05-24 1974-10-26 FOUR-STROKE COMBUSTION ENGINE
DE19742450969 Granted DE2450969A1 (en) 1974-05-24 1974-10-26 FOUR-STROKE COMBUSTION ENGINE
DE19742450994 Withdrawn DE2450994A1 (en) 1974-05-24 1974-10-26 FOUR-STROKE COMBUSTION ENGINE
DE19742450977 Granted DE2450977A1 (en) 1974-05-24 1974-10-26 METHOD OF ADJUSTING A FOUR-STROKE COMBUSTION ENGINE

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DE19742451064 Withdrawn DE2451064A1 (en) 1974-05-24 1974-10-26 FOUR-STROKE COMBUSTION ENGINE
DE19742450969 Granted DE2450969A1 (en) 1974-05-24 1974-10-26 FOUR-STROKE COMBUSTION ENGINE
DE19742450994 Withdrawn DE2450994A1 (en) 1974-05-24 1974-10-26 FOUR-STROKE COMBUSTION ENGINE
DE19742450977 Granted DE2450977A1 (en) 1974-05-24 1974-10-26 METHOD OF ADJUSTING A FOUR-STROKE COMBUSTION ENGINE

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EP0686759A1 (en) * 1994-06-07 1995-12-13 Toyota Jidosha Kabushiki Kaisha Compression ignition type gasoline engine injecting fuel inside intake port during exhaust stroke
US6230683B1 (en) 1997-08-22 2001-05-15 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control
US6276334B1 (en) 1998-02-23 2001-08-21 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control
US6286482B1 (en) 1996-08-23 2001-09-11 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control

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JP4326044B2 (en) * 1998-08-21 2009-09-02 日産自動車株式会社 4-cycle internal combustion engine
DE19852389A1 (en) 1998-11-13 2000-05-18 Fev Motorentech Gmbh Piston engine with throttle-free load control and device for generating a negative pressure
US6913005B2 (en) * 2002-03-22 2005-07-05 Chrysalis Technologies Incorporated System and methodology for purging fuel from a fuel injector during start-up
US7032576B2 (en) 2002-05-10 2006-04-25 Philip Morris Usa Inc. Capillary heating control and fault detection system and methodology for fuel system in an internal combustion engine
EP2290217B1 (en) 2008-03-17 2016-03-16 Husqvarna AB Fuel supply unit
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EP0686759A1 (en) * 1994-06-07 1995-12-13 Toyota Jidosha Kabushiki Kaisha Compression ignition type gasoline engine injecting fuel inside intake port during exhaust stroke
US5535716A (en) * 1994-06-07 1996-07-16 Toyota Jidosha Kabushiki Kaisha Compression ignition type gasoline engine injecting fuel inside intake port during exhaust stroke
US6286482B1 (en) 1996-08-23 2001-09-11 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control
US6230683B1 (en) 1997-08-22 2001-05-15 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control
US6276334B1 (en) 1998-02-23 2001-08-21 Cummins Engine Company, Inc. Premixed charge compression ignition engine with optimal combustion control

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SE429364B (en) 1983-08-29
DE2451064A1 (en) 1975-12-11
SE7413141L (en) 1975-11-25
GB1491884A (en) 1977-11-16
SE7413140L (en) 1975-11-25
DE2450969A1 (en) 1975-12-11
DE2450994A1 (en) 1975-12-11
GB1491882A (en) 1977-11-16
DE2450969C2 (en) 1988-08-25
GB1483408A (en) 1977-08-17
SE410210B (en) 1979-10-01
SE7413145L (en) 1975-11-25
SE429365B (en) 1983-08-29
SE7413139L (en) 1975-11-25
SE429369B (en) 1983-08-29
DE2450977C2 (en) 1987-04-09
SE429368B (en) 1983-08-29
SE7413144L (en) 1975-11-25
GB1491883A (en) 1977-11-16
DE2450977A1 (en) 1975-12-04
DE2451068A1 (en) 1975-12-11
SE7413143L (en) 1975-11-25

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