EP0905373B1 - Fuel system - Google Patents

Fuel system Download PDF

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Publication number
EP0905373B1
EP0905373B1 EP98116785A EP98116785A EP0905373B1 EP 0905373 B1 EP0905373 B1 EP 0905373B1 EP 98116785 A EP98116785 A EP 98116785A EP 98116785 A EP98116785 A EP 98116785A EP 0905373 B1 EP0905373 B1 EP 0905373B1
Authority
EP
European Patent Office
Prior art keywords
tank
fuel
connection
fuel system
locking part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98116785A
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German (de)
French (fr)
Other versions
EP0905373A1 (en
Inventor
Paul Edward Mcneill
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.)
Techtronic Industries Co Ltd
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Techtronic Industries Co Ltd
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Publication date
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Publication of EP0905373A1 publication Critical patent/EP0905373A1/en
Application granted granted Critical
Publication of EP0905373B1 publication Critical patent/EP0905373B1/en
Anticipated expiration legal-status Critical
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0017Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor related to fuel pipes or their connections, e.g. joints or sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/12Separate cylinder-crankcase elements coupled together to form a unit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047Layout or arrangement of systems for feeding fuel
    • F02M37/007Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076Details of the fuel feeding system related to the fuel tank
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/02Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00Receptacles
    • Y10S220/905Flexible fuel tank for a vehicle

Definitions

  • the invention relates to a fuel system Internal combustion engine with a fuel line for the removal of Fuel for combustion purposes and a tank that uses a holder directly or indirectly on the Internal combustion engine is kept, and its use.
  • US-A-3,731,846 discloses a portable work tool in US Shape of a chainsaw with a fuel system that has a Contains one or two in the bottom area Pipe sockets open, from which and via a fuel line Fuel is supplied to an internal combustion engine.
  • the container is designed to be filled with fuel filled tank can take in itself, and the pipe socket so pointed that they penetrate the bottom of the tank, when it is pressed into the container.
  • the tank is in held the container by means of a lid which by means of Seals on container walls and one Contains vent screw. The tank is used after destroyed and replaced by another filled tank.
  • US-A-4,098,218 shows an outboard motor with one removable fuel tank, which is designed such that it can be used as a portable fuel canister.
  • the fuel tank has means that have a fuel outlet seal off when the fuel tank from the outboard motor is removed, as well as a hollowed out area, which in the engine mounted on the outboard motor as well encloses other components.
  • components which are designed in this way are that they create a sealing connection. It is coming thus not to uncontrolled fuel leakage and the The area around the holder and the tank remain dry.
  • the keeper can be directly on the motor housing, but also on one with this connected component, such as a frame, carrier or the like be attached.
  • the use of molded parts on the holder and The tank make it possible to use the tank properly and without tools aligned with the holder to determine what changeover time or Fuel time reduced and a correct connection guaranteed.
  • a good guidance, a secure hold and relatively low Manufacturing costs are achieved by both Form-locking parts in the manner of a dovetail guide are connected to each other, which is achieved in that for both a T-profile is chosen.
  • the holder has a nozzle for receiving the first Has coupling part, a possibly provided in it Chamber for receiving the tank turn out the bigger and the Sockets can be used to hold the first coupling part be formed.
  • the nozzle z. B. relatively firm molded to provide adequate resistance at the To offer inclusion of the second coupling part.
  • the tank could also be in a suitable place again be filled; with the small number of containers in question, however, it makes more sense to get the tank out of a recyclable one To produce material.
  • a complete separation of other functions of one Fuel system, such as. B. a vent or a sufficient supply of fuel under all operating conditions, can be achieved by the tank that a Distributor with a first connection for a fuel line to deliver fuel for the combustion process, a second connection for a fuel line for a Venting and or starting device and a third Connection for connection to the tank is provided.
  • connection Storage area with a larger diameter is provided, can always accumulate fuel that has a liquid level forms, which penetrates air into the Fuel line z. B. prevents a carburetor.
  • the arrangement of the first connection below the third Connection makes a pump or the like unnecessary because then the fuel increases due to gravity alone the combustion process flows.
  • Venting the fuel system using one of the Tank separate venting device has the advantage that the Tank can be kept simple and the venting device is not exchanged with every tank change.
  • the invention is related with a motor 1 of the two-stroke design for a line mower described as shown in Figure 1.
  • the Motor 1 drives a shaft 2 in a known manner.
  • Fuel system 3 for liquid fuel is by means of a Metal flange 4 attached to the engine 1.
  • the fuel system 3 contains a cast holder 5, from which one Spigot 6 extends.
  • a tank 7 is detachable on the holder 5 fixed.
  • a first coupling part 8 in the manner of a sleeve is for connection to a suitable second coupling part 9 built into the nozzle 6 in the tank 7.
  • a carburetor 12 of the engine 1 is by means of Fuel lines 10 and 11 to the fuel system 3 and a distributor 13 also serving as an intake pipe.
  • the distributor 13 receives fuel through a tank outlet 14 and ventilates the fuel system 3.
  • the tank 7, as shown in Figures 4 to 6, is a Container made of a high-density polyethylene or of a other usable material that is reused can be.
  • a first one designed in the manner of a web Form-locking part 16 is cohesively in the surface 15 of the Tanks 7 poured in with a slot construction in the Holder 5 to engage, as will be described in more detail below is described.
  • the Cross section of the tank 7 in the longitudinal direction chosen so that it Fuel can accumulate at an outlet 17 which is in a corner area at the lowermost end 18 of the tank 7.
  • a bottom 19 of the tank 7 slopes down to the outlet 17 in order to it to allow the tank 7 to be completely and without To leave residues, to empty.
  • FIG. 5 shows one matching second coupling part 9, as in the outlet 17th is secured.
  • the second coupling part 9 is by means of a thread 21 secured or poured into the outlet 17 and with a Provide shut-off valve that opens when the connection to the second coupling part 9 is produced. It is appropriate, that the second coupling part 9 in terms of low cost is selected because this part is destroyed with the tank 7.
  • the tank 7 is designed so that it fits into the holder 5, what allows a more universal shape of the tank 7.
  • the Construction of the tank 7 is also chosen so that it is attached to a Filling process and various tools of the product range is adjusted. For the applications currently under consideration tank 7 with a capacity of 0.24 - 0.38 liters (8 - 12 American Liquid Ounces).
  • the holder 5 for the tank 7 is either made of a cast Plastic or steel to get around the area Tanks 7 for a specific product, e.g. B. the engine 1 one Thread mower, as shown in Figure 1 to fit.
  • the Holder 5 is a component of the engine 1 and is in grown condition sold with this.
  • a chamber 22 is of surrounded by the structure of the holder 5 and in general evenly formed in shape to the tank 7 record whatever the needs of the Tank environment.
  • a generally cylindrical flange or nozzle 6 extends outward from the holder 5, around a structural seat 24 for the first coupling part 8 to build.
  • the first coupling part 8 is shown in FIG. 9 as a so-called mother piece trained and takes the second Coupling part 9 of the tank 7 when the tank 7 in the chamber 22 is used.
  • a T-shaped and like a Slit formed second form-locking part 23 is in the Holder 5 cast or embossed and opens to the Chamber 22 out with the correspondingly T-shaped first Positive locking part 16 of the tank 7 in a positive connection to be able to get there.
  • the means by which the tank 7 in the Chamber 22 of the holder 5 engaged and secured can vary in appearance but it is important that the tank 7 can be set in a way that the Liquid connection of the tank 7 within the Fuel system 3 maintained. That kind of connection a second form-locking part 23 with a first Form-locking part 16 provides an effective fixing of the tank 7 in the holder 5.
  • the engagement of the second clutch part 9th in the first coupling part 8 also ensures a Holding force.
  • the first coupling part 8 is in an opening 25 mounted, which is formed in the seat 24 of the nozzle 6, and by means of a nut 26 which engages in the thread 20, securely attached in place.
  • the engine 1 is by means of the distributor 13 to the Fuel system 3 connected as best in the Figures 2 and 3 is shown.
  • the distributor 13 is in the essentially a steel pipe and surrounds an enlarged one Storage area 27 and a ventilation area 28, the are interconnected.
  • the distributor 13 serves different purposes.
  • the distributor 13 ensures a Vent the fuel system 3 at its highest open End. It contains one at its lower end first connection 29, which with the fuel line 11 in Connected, which leads to the inlet of the carburetor 12 to Feed fuel from the tank 7 to the carburetor 12.
  • In one intermediate area is a third port 30 or Inflow area provided, which with the tank outlet 14 of the tank 7th communicates to the flow of fuel through the Allow storage area 27.
  • An upper or second Connection 31 is in connection with a cleaning or Starter circuit that pumps fuel to the carburetor 12 allowed.
  • the fuel is the distributor 13 due to the Gravity flows, and it is therefore necessary that the Manifold 13 and tank 7 are properly aligned to the Ensure the function of the fuel system 3.
  • the Storage area 27 remains filled with fuel to sort Liquid seal for the fuel line 11 to the To produce carburetor 12. In this way, air bubbles prevented, which could lead to the performance of the Motors 1 drops, or it even switches off.
  • the chamber 22 is designed to hold the tank 7 records, which has a general shape so that it with Motors 1 different models and different shapes can be used.
  • the tank 7 forms a tight unit, when it is assembled with the second coupling part 9.
  • the tank 7 is either through the second coupling part 9 or filled with fuel in another useful way.
  • the Fuel is optimized for the engine in question by premixed oil, or other additives that are added improve exhaust emissions and increase engine performance.
  • the tank 7 is attached to the holder 5 and on the fuel system 3 by snapping the first Coupling part 8 connected in the second coupling part 9, which conveniently connects and disconnects the tank 7 to or from the fuel system 3.
  • the Complexity and the cost of the tank 7 are due to the Use of the distributor 13 minimized that Fuel system 3 vented and connected to the Manufactures fuel line 11 to the carburetor 12.
  • the Distributor 13 also connects the fuel line 10 for the cleaning or starting circuit to the fuel system 3 ago.
  • the storage area 27 is of a small size enlarged area of the passage of the distributor 13 is formed, that holds back a small amount of fuel. To this A constant sealing of the fuel line 11 is achieved created.
  • a suitable fuel system 3 for Provided a sealed disposable tank 7 contains, which can be used without filling and mixing.
  • the fuel itself can in terms of exhaust gases and Motor 1 performance can be optimized.
  • By taking the tank 7 out is made from a recyclable material Environmental impact of the fuel system with reduced emissions of the engine 1 kept low.

Description

Die Erfindung betrifft ein Kraftstoffsystem eines Verbrennungsmotors mit einer Kraftstoffleitung zur Abfuhr von Kraftstoff für Verbrennungszwecke und einem Tank, der mittels eines Halters mittelbar oder unmittelbar an dem Verbrennungsmotor gehalten wird, und dessen Verwendung.The invention relates to a fuel system Internal combustion engine with a fuel line for the removal of Fuel for combustion purposes and a tank that uses a holder directly or indirectly on the Internal combustion engine is kept, and its use.

Die US-A-3,731,846 offenbart ein tragbares Arbeitsgerät in der Form einer Kettensäge mit einem Kraftstoffsystem, das einen Behälter enthält, in dessen Bodenbereich ein oder zwei Rohrstutzen münden, von denen aus und über eine Kraftstoffleitung Kraftstoff einem Verbrennungsmotor zugeführt wird. Der Behälter ist so ausgebildet, daß er einen mit Kraftstoff gefüllten Tank in sich aufnehmen kann, und die Rohrstutzen sind dermaßen spitz ausgebildet, daß sie den Tankboden durchdringen, wenn dieser in den Behälter eingepreßt wird. Der Tank wird in dem Behälter mittels eines Deckels gehalten, der mittels Dichtungen auf Behälterwandungen aufliegt und eine Entlüftungsschraube enthält. Der Tank wird nach dem Gebrauch vernichtet und durch einen anderen gefüllten Tank ersetzt.US-A-3,731,846 discloses a portable work tool in US Shape of a chainsaw with a fuel system that has a Contains one or two in the bottom area Pipe sockets open, from which and via a fuel line Fuel is supplied to an internal combustion engine. The The container is designed to be filled with fuel filled tank can take in itself, and the pipe socket so pointed that they penetrate the bottom of the tank, when it is pressed into the container. The tank is in held the container by means of a lid which by means of Seals on container walls and one Contains vent screw. The tank is used after destroyed and replaced by another filled tank.

Die US-A-4,098,218 zeigt einem Außenbordmotor mit einem entfernbaren Kraftstofftank, welcher derart ausgebildet ist, daß er als ein tragbarer Treibstoffkanister verwendet werden kann. Der Kraftstofftank weist Mittel auf, die einen Kraftstoffauslaß verschließen, wenn der Kraftstofftank von dem Außenbordmotor entfernt wird, sowie einen ausgehöhlten Bereich auf, welcher in auf dem Außenbordmotor aufgesetzten Zustand den Motor sowie weitere Bauteile umschließt.US-A-4,098,218 shows an outboard motor with one removable fuel tank, which is designed such that it can be used as a portable fuel canister. The fuel tank has means that have a fuel outlet seal off when the fuel tank from the outboard motor is removed, as well as a hollowed out area, which in the engine mounted on the outboard motor as well encloses other components.

Das der Erfindung zugrunde liegende Problem wird darin gesehen, daß ein solcher Tank keinen sicheren Halt bei starken Bewegungen des Verbrennungsmotors, wie sie insbesondere bei tragbaren Arbeitsgeräten auftreten, aufweist.The problem underlying the invention is seen in that such a tank does not hold securely with strong movements of the internal combustion engine, as is particularly the case with portable Work tools occur.

Dieses Problem wird erfindungsgemäß durch die Lehre des Patentanspruchs 1 gelöst, wobei in den weiteren Patentansprüchen die Lösung in vorteilhafter Weise weiterentwickelnde Merkmale aufgeführt sind, bzw. eine vorteilhafte Verwendung beansprucht wird.This problem is solved according to the invention by the teaching of the patent claim 1 solved, the in the further claims Features that further develop features in an advantageous manner are listed, or claimed an advantageous use becomes.

Auf diese Weise sind Bauelemente vorgesehen, die so ausgebildet sind, daß sie eine dichtende Verbindung herstellen. Es kommt somit nicht zu unkontrolliertem Kraftstoffaustritt und die Umgebung des Halters und des Tanks bleiben trocken. Der Halter kann direkt an das Motorgehäuse, aber auch an einem mit diesem verbundenen Bauteil, wie einem Rahmen, Träger oder dergleichen befestigt sein. Die Verwendung von Formteilen an dem Halter und dem Tank machen es möglich, den Tank ohne Werkzeuge und richtig ausgerichtet an dem Halter festzulegen, was Umrüstzeit, bzw. Tankzeit reduziert und eine richtige Verbindung garantiert. Eine gute Führung, ein sicherer Halt und relativ geringe Herstellungskosten werden dadurch erreicht, dass beide Formschlußteile in der Art einer Schwalbenschwanzführung miteinander verbunden werden, was dadurch erreicht wird, daß für beide ein T-Profil gewählt wird.In this way, components are provided which are designed in this way are that they create a sealing connection. It is coming thus not to uncontrolled fuel leakage and the The area around the holder and the tank remain dry. The keeper can be directly on the motor housing, but also on one with this connected component, such as a frame, carrier or the like be attached. The use of molded parts on the holder and The tank make it possible to use the tank properly and without tools aligned with the holder to determine what changeover time or Fuel time reduced and a correct connection guaranteed. A good guidance, a secure hold and relatively low Manufacturing costs are achieved by both Form-locking parts in the manner of a dovetail guide are connected to each other, which is achieved in that for both a T-profile is chosen.

Wenn in oder an dem ersten und dem zweiten Kupplungsteil ein Sperrventil vorgesehen ist und somit auch nach der Demontage des Tanks aus diesem kein Kraftstoff austreten kann, kann dieser auf beliebige Weise bis zur Wiederverwertung gehandhabt werden.When in or on the first and second coupling parts Check valve is provided and thus also after dismantling the Tanks from which no fuel can escape, this can occur can be handled in any way until recycling.

Wenn der Halter einen Stutzen zur Aufnahme des ersten Kupplungsteils aufweist, kann eine evtl. in ihm vorgesehene Kammer zur Aufnahme des Tanks umso größer ausfallen und der Stutzen kann speziell zur Aufnahme des ersten Kupplungsteils ausgebildet werden. Somit kann der Stutzen z. B. relativ fest geformt werden, um einen ausreichenden Widerstand bei der Aufnahme des zweiten Kupplungsteils zu bieten. If the holder has a nozzle for receiving the first Has coupling part, a possibly provided in it Chamber for receiving the tank turn out the bigger and the Sockets can be used to hold the first coupling part be formed. Thus, the nozzle z. B. relatively firm molded to provide adequate resistance at the To offer inclusion of the second coupling part.

Die Füllung des Tanks mit gebrauchsfertig gemischtem Kraftstoff, d. h. mit Zusätzen und einem evtl. Ölgemisch, schafft die Voraussetzung für eine schadstoffreie Kraftstoffanwendung und für einen optimalen Betrieb des Motors unter umweltpolitischen Gesichtspunkten und bei bester Leistung. Filling the tank with ready-mixed fuel, d. H. with additives and a possible oil mixture, creates the Requirement for a pollutant-free fuel application and for optimal engine operation under environmental policy Aspects and with the best performance.

Zwar könnte der Tank auch an einer geeigneten Stelle wieder befüllt werden; bei den geringen infrage kommenden Gebinden, ist es jedoch sinnvoller, den Tank aus einem recyclingfähigen Material herzustellen.The tank could also be in a suitable place again be filled; with the small number of containers in question, however, it makes more sense to get the tank out of a recyclable one To produce material.

Eine vollkommene Trennung sonstiger Funktionen eines Kraftstoffsystems, wie z. B. eine Entlüftung oder eine ausreichende Zufuhr von Kraftstoff unter allen Betriebsumständen, von dem Tank kann dadurch erreicht werden, daß ein Verteiler mit einem ersten Anschluß für eine Kraftstoffleitung zur Abgabe von Kraftstoff für den Verbrennungsvorgang, einem zweiten Anschluß für eine Kraftstoffleitung für eine Entlüftungs- und oder Anlaßvorrichtung und einem dritten Anschluß für die Verbindung mit dem Tank vorgesehen wird.A complete separation of other functions of one Fuel system, such as. B. a vent or a sufficient supply of fuel under all operating conditions, can be achieved by the tank that a Distributor with a first connection for a fuel line to deliver fuel for the combustion process, a second connection for a fuel line for a Venting and or starting device and a third Connection for connection to the tank is provided.

Dadurch, daß zwischen dem ersten und dem dritten Anschluß ein Vorratsbereich mit einem größeren Durchmesser vorgesehen ist, kann sich stets Kraftstoff ansammeln, der einen Flüssigkeitsspiegel bildet, der ein Eindringen von Luft in die Kraftstoffleitung z. B. zu einem Vergaser unterbindet.The fact that between the first and the third connection Storage area with a larger diameter is provided, can always accumulate fuel that has a liquid level forms, which penetrates air into the Fuel line z. B. prevents a carburetor.

Die Anordnung des ersten Anschlusses unterhalb des dritten Anschlusses macht eine Pumpe oder dergleichen entbehrlich, weil dann der Kraftstoff alleine aufgrund der Erdanziehungskraft zu dem Verbrennungsvorgang fließt.The arrangement of the first connection below the third Connection makes a pump or the like unnecessary because then the fuel increases due to gravity alone the combustion process flows.

Eine Entlüftung des Kraftstoffsystems mittels einer von dem Tank getrennten Entlüftungsvorrichtung hat den Vorteil, daß der Tank einfach gehalten werden kann und die Entlüftungsvorrichtung nicht bei jedem Tankwechsel mit ausgetauscht wird.Venting the fuel system using one of the Tank separate venting device has the advantage that the Tank can be kept simple and the venting device is not exchanged with every tank change.

Wenn die ankommende Kraftstoffmenge größer ist als die für den Verbrennungsvorgang benötigte, ist in dem Vorratsbereich immer genug Kraftstoff vorhanden, um eine Flüssigkeitssperre gegen den Eintritt von Luft zu bilden. If the amount of fuel arriving is greater than that for the The combustion process required is always in the storage area enough fuel available to counter a liquid barrier to form the entry of air.

Die Verwendung des erfindungsgemäßen Kraftstoffsystems für einen Verbrennungsmotor an Geräten der Grundstücks- und Gartenpflege, insbesondere Fadenmähern, vermeidet die Verseuchung von Bodenreich im Garten und die Gefährdung von Laien, die vielfach mit derart motorgetriebenen Werkzeugen arbeiten.The use of the fuel system according to the invention for an internal combustion engine on equipment of the property and Garden maintenance, especially string mowers, avoids that Contamination of soil in the garden and the endangerment of Lay people, often with such motor-driven tools work.

In der Zeichnung ist ein nachfolgend näher beschriebenes Ausführungsbeispiel der Erfindung dargestellt. Es zeigt:

Fig. 1
einen Motor mit einem erfindungsgemäßen Kraftstoffsystem in perspektivischer Darstellung,
Fig. 2
einen Verteiler des Kraftstoffsystems aus Figur 1 in Seitenansicht,
Fig. 3
den Verteiler aus Figur 2 in einem vertikalen Längsschnitt,
Fig. 4
einen Tank des Kraftstoffsystems aus Figur 1 in perspektivischer Darstellung,
Fig. 5
den Tank aus Figur 4 in einem vertikalen Längsschnitt entlang der Linie 5-5 und in der Blickrichtung der dazugehörigen Pfeile in Figur 4,
Fig. 6
den Tank aus Figur 4 in einem vertikalen Querschnitt entlang der Linie 6-6 und in der Blickrichtung der dazugehörigen Pfeile in Figur 5,
Fig. 7
einen Halter des Kraftstoffsystems aus Figur 1 in perspektivischer Darstellung von einer Seite,
Fig. 8
den Halter aus Figur 7 in perspektivischer Darstellung von der anderen Seite,
Fig. 9
den Halter aus Figur 7 in einem vertikalen Längsschnitt entlang der Linie 9-9 und in der Blickrichtung der dazugehörigen Pfeile in Figur 7, und
Fig. 10
den Halter aus Figur 7 in einem vertikalen Querschnitt entlang der Linie 10-10 und in der Blickrichtung der dazugehörigen Pfeile in Figur 7.
In the drawing, an embodiment of the invention described in more detail below is shown. It shows:
Fig. 1
an engine with a fuel system according to the invention in a perspective view,
Fig. 2
2 shows a distributor of the fuel system from FIG. 1 in a side view,
Fig. 3
2 in a vertical longitudinal section,
Fig. 4
2 shows a perspective view of a tank of the fuel system from FIG. 1,
Fig. 5
4 in a vertical longitudinal section along the line 5-5 and in the direction of view of the associated arrows in FIG. 4,
Fig. 6
4 in a vertical cross section along the line 6-6 and in the direction of view of the associated arrows in FIG. 5,
Fig. 7
2 shows a holder of the fuel system from FIG. 1 in a perspective view from one side,
Fig. 8
7 in a perspective view from the other side,
Fig. 9
7 in a vertical longitudinal section along the line 9-9 and in the direction of view of the associated arrows in FIG. 7, and
Fig. 10
7 in a vertical cross section along the line 10-10 and in the direction of view of the associated arrows in FIG. 7.

Aus Gründen der Einfachheit wird die Erfindung im Zusammenhang mit einem Motor 1 der Zwei-Takt-Bauart für einen Fadenmäher beschrieben, wie er in Figur 1 gezeigt ist. Es wird darauf hingewiesen, daß das beschriebene Kraftstoffsystem 3 in einer großen Variation von Anwendungsfällen einschließlich Rasenmähern, Heckenschneidern, Gebläsen, Kettensägen und anderen vergleichbaren Werkzeugen angewendet werden kann. Der Motor 1 treibt eine Welle 2 in bekannter Weise an. Ein Kraftstoffsystem 3 für flüssigen Kraftstoff ist mittels eines Metallflansches 4 an den Motor 1 angebaut. Das Kraftstoffsystem 3 enthält einen gegossenen Halter 5, von dem aus sich ein Stutzen 6 forterstreckt. Ein Tank 7 ist lösbar an dem Halter 5 festgemacht. Ein erster Kupplungsteil 8 in der Art einer Muffe ist zur Verbindung mit einem passenden zweiten Kupplungsteil 9 in dem Tank 7 in den Stutzen 6 eingebaut. In dem bevorzugten Ausführungsbeispiel ist der erste Kupplungsteil 8 als der weibliche und der zweite Kupplungsteil 9 als der männliche Teil einer Kupplung ausgebildet, was allerdings auch umgekehrt möglich wäre. Ein Vergaser 12 des Motors 1 ist mittels Kraftstoffleitungen 10 und 11 an das Kraftstoffsystem 3 und an einen auch als Ansaugrohr dienenden Verteiler 13 angeschlossen. Der Verteiler 13 erhält Kraftstoff durch einen Tankauslaß 14 und belüftet das Kraftstoffsystem 3.For simplicity, the invention is related with a motor 1 of the two-stroke design for a line mower described as shown in Figure 1. It will be on it noted that the fuel system 3 described in a large variety of use cases including Lawnmowers, hedge trimmers, blowers, chainsaws and other comparable tools can be used. The Motor 1 drives a shaft 2 in a known manner. On Fuel system 3 for liquid fuel is by means of a Metal flange 4 attached to the engine 1. The fuel system 3 contains a cast holder 5, from which one Spigot 6 extends. A tank 7 is detachable on the holder 5 fixed. A first coupling part 8 in the manner of a sleeve is for connection to a suitable second coupling part 9 built into the nozzle 6 in the tank 7. In the preferred Embodiment is the first coupling part 8 as the female and the second coupling part 9 as the male part a clutch, which is also the other way around it is possible. A carburetor 12 of the engine 1 is by means of Fuel lines 10 and 11 to the fuel system 3 and a distributor 13 also serving as an intake pipe. The distributor 13 receives fuel through a tank outlet 14 and ventilates the fuel system 3.

Der Tank 7, wie er in den Figuren 4 bis 6 gezeigt ist, ist ein Behälter aus einem hochdichten Polyethylen oder aus einem anderen brauchbaren Material gebildet, das wiederverwendet werden kann. Ein erster in der Art eines Steges ausgebildeter Formschlußteil 16 ist stoffschlüssig in die Oberfläche 15 des Tanks 7 eingegossen, um mit einer Schlitzkonstruktion in dem Halter 5 in Eingriff zu geraten, wie dies weiter unten näher beschrieben ist. Wie es in Figur 5 gezeigt ist, ist der Querschnitt des Tanks 7 in der Längsrichtung so gewählt, daß er Kraftstoff an einem Auslaß 17 sich ansammeln läßt, der sich in einem Eckbereich an dem untersten Ende 18 des Tanks 7 befindet. Ein Boden 19 des Tanks 7 neigt sich zu dem Auslaß 17 hinab, um es dem Tank 7 zu ermöglichen, sich vollkommen und ohne Rückstände zu belassen, zu entleeren. Figur 5 zeigt einen passenden zweiten Kupplungsteil 9, wie er in dem Auslaß 17 gesichert ist. Der zweite Kupplungsteil 9 ist mittels Gewinde 21 gesichert oder in den Auslaß 17 eingegossen und mit einem Sperrventil versehen, das öffnet, wenn die Verbindung mit dem zweiten Kupplungsteil 9 hergestellt wird. Es ist angebracht, daß der zweite Kupplungsteil 9 im Hinblick auf geringe Kosten ausgewählt wird, da dieses Teil mit dem Tank 7 vernichtet wird. Der Tank 7 ist so ausgebildet, daß er in den Halter 5 paßt, was eine universellere Formgebung des Tanks 7 zuläßt. Die Konstruktion des Tanks 7 ist auch so gewählt, daß er an ein Füllverfahren und verschiedene Werkzeuge der Produktreihe angepaßt ist. Für die gegenwärtig erwogenen Anwendungsfälle wird der Tank 7 mit einer Kapazität von 0,24 - 0,38 Liter (8 - 12 amerikanische Flüssigkeits-Ounces) ausgebildet.The tank 7, as shown in Figures 4 to 6, is a Container made of a high-density polyethylene or of a other usable material that is reused can be. A first one designed in the manner of a web Form-locking part 16 is cohesively in the surface 15 of the Tanks 7 poured in with a slot construction in the Holder 5 to engage, as will be described in more detail below is described. As shown in Figure 5, the Cross section of the tank 7 in the longitudinal direction chosen so that it Fuel can accumulate at an outlet 17 which is in a corner area at the lowermost end 18 of the tank 7. A bottom 19 of the tank 7 slopes down to the outlet 17 in order to it to allow the tank 7 to be completely and without To leave residues, to empty. Figure 5 shows one matching second coupling part 9, as in the outlet 17th is secured. The second coupling part 9 is by means of a thread 21 secured or poured into the outlet 17 and with a Provide shut-off valve that opens when the connection to the second coupling part 9 is produced. It is appropriate, that the second coupling part 9 in terms of low cost is selected because this part is destroyed with the tank 7. The tank 7 is designed so that it fits into the holder 5, what allows a more universal shape of the tank 7. The Construction of the tank 7 is also chosen so that it is attached to a Filling process and various tools of the product range is adjusted. For the applications currently under consideration tank 7 with a capacity of 0.24 - 0.38 liters (8 - 12 American Liquid Ounces).

Der Halter 5 für den Tank 7 ist entweder aus einem gegossenen Kunststoff oder aus Stahl hergestellt, um in die Umgebung des Tanks 7 bei einem bestimmten Produkt, z. B. dem Motor 1 eines Fadenmähers, wie er in Figur 1 gezeigt ist, zu passen. Der Halter 5 stellt eine Komponente des Motors 1 dar und wird im angebauten Zustand mit diesem verkauft. Eine Kammer 22 wird von der Struktur des Halters 5 umgeben und im allgemeinen gleichmäßig in ihrer Form ausgebildet, um den Tank 7 aufzunehmen, unabhängig davon, was die Erfordernisse der Tankumgebung sind. Ein im allgemeinen zylindrischer Flansch oder Stutzen 6 erstreckt sich von dem Halter 5 aus nach außen, um einen strukturellen Sitz 24 für den ersten Kupplungsteil 8 zu bilden. Der erste Kupplungsteil 8 ist in Figur 9 als ein sog. Mutterstück ausgebildet und nimmt den zweiten Kupplungsteil 9 des Tanks 7 auf, wenn der Tank 7 in die Kammer 22 eingesetzt wird. Ein T-förmiger und in der Art eines Schlitzes ausgebildeter zweiter Formschlußteil 23 ist in den Halter 5 eingegossen oder eingeprägt und öffnet sich zu der Kammer 22 hin, um mit dem entsprechend T-förmigen ersten Formschlußteil 16 des Tanks 7 in eine formschlüssige Verbindung gelangen zu können. Die Mittel, mit denen der Tank 7 in der Kammer 22 des Halters 5 in Eingriff gebracht und gesichert werden kann, können im Aussehen variieren, aber es ist wichtig, daß der Tank 7 in einer Weise festgelegt werden kann, die die Flüssigkeitsverbindung des Tanks 7 innerhalb des Kraftstoffsystems 3 aufrechterhält. Diese Art der Verbindung eines zweiten Formschlußteils 23 mit einem ersten Formschlußteil 16 stellt eine wirksame Festlegung des Tanks 7 in dem Halter 5 dar. Das Einrücken des zweiten Kupplungsteils 9 in den ersten Kupplungsteil 8 sorgt ebenfalls für eine Haltekraft. Der erste Kupplungsteil 8 ist in einer Öffnung 25 montiert, die in dem Sitz 24 des Stutzens 6 ausgebildet ist, und mittels einer Mutter 26, die in das Gewinde 20 eingreift, sicher an Ort und Stelle befestigt.The holder 5 for the tank 7 is either made of a cast Plastic or steel to get around the area Tanks 7 for a specific product, e.g. B. the engine 1 one Thread mower, as shown in Figure 1 to fit. The Holder 5 is a component of the engine 1 and is in grown condition sold with this. A chamber 22 is of surrounded by the structure of the holder 5 and in general evenly formed in shape to the tank 7 record whatever the needs of the Tank environment. A generally cylindrical flange or nozzle 6 extends outward from the holder 5, around a structural seat 24 for the first coupling part 8 to build. The first coupling part 8 is shown in FIG. 9 as a so-called mother piece trained and takes the second Coupling part 9 of the tank 7 when the tank 7 in the chamber 22 is used. A T-shaped and like a Slit formed second form-locking part 23 is in the Holder 5 cast or embossed and opens to the Chamber 22 out with the correspondingly T-shaped first Positive locking part 16 of the tank 7 in a positive connection to be able to get there. The means by which the tank 7 in the Chamber 22 of the holder 5 engaged and secured can vary in appearance but it is important that the tank 7 can be set in a way that the Liquid connection of the tank 7 within the Fuel system 3 maintained. That kind of connection a second form-locking part 23 with a first Form-locking part 16 provides an effective fixing of the tank 7 in the holder 5. The engagement of the second clutch part 9th in the first coupling part 8 also ensures a Holding force. The first coupling part 8 is in an opening 25 mounted, which is formed in the seat 24 of the nozzle 6, and by means of a nut 26 which engages in the thread 20, securely attached in place.

Der Motor 1 ist mittels des Verteilers 13 an das Kraftstoffsystem 3 angeschlossen, wie dies am besten in den Figuren 2 und 3 gezeigt ist. Der Verteiler 13 ist im wesentlichen ein Rohr aus Stahl und umgibt einen vergrößerten Vorratsbereich 27 und einen Entlüftungsbereich 28, die miteinander verbunden sind. Der Verteiler 13 dient verschiedenen Zwecken. Der Verteiler 13 sorgt für eine Entlüftung des Kraftstoffsystems 3 an seinem höchsten offenen Endbereich. An seinem unteren Endbereich enthält er einen ersten Anschluß 29, der mit der Kraftstoffleitung 11 in Verbindung steht, die zu dem Einlaß des Vergasers 12 führt, um Kraftstoff aus dem Tank 7 dem Vergaser 12 zuzuführen. In einem dazwischenliegenden Bereich ist ein dritter Anschluß 30 oder Zulaufbereich vorgesehen, der mit dem Tankauslaß 14 des Tanks 7 in Verbindung steht, um den Fluß von Kraftstoff durch den Vorratsbereich 27 zu ermöglichen. Ein oberer oder zweiter Anschluß 31 steht in Verbindung mit einem Reinigungs- oder Anlaßkreis, der das Pumpen von Kraftstoff zu dem Vergaser 12 gestattet. Der Kraftstoff wird dem Verteiler 13 aufgrund der Schwerkraft zufließen, und es ist daher erforderlich, daß der Verteiler 13 und der Tank 7 richtig ausgerichtet sind, um die Funktion des Kraftstoffsystems 3 sicherzustellen. Der Vorratsbereich 27 bleibt mit Kraftstoff gefüllt, um eine Art Flüssigkeitsdichtung für die Kraftstoffleitung 11 zu dem Vergaser 12 zu erzeugen. Auf diese Weise werden Luftblasen verhindert, die dazu führen könnten, daß die Leistung des Motors 1 abfällt, oder dieser gar abschaltet.The engine 1 is by means of the distributor 13 to the Fuel system 3 connected as best in the Figures 2 and 3 is shown. The distributor 13 is in the essentially a steel pipe and surrounds an enlarged one Storage area 27 and a ventilation area 28, the are interconnected. The distributor 13 serves different purposes. The distributor 13 ensures a Vent the fuel system 3 at its highest open End. It contains one at its lower end first connection 29, which with the fuel line 11 in Connected, which leads to the inlet of the carburetor 12 to Feed fuel from the tank 7 to the carburetor 12. In one intermediate area is a third port 30 or Inflow area provided, which with the tank outlet 14 of the tank 7th communicates to the flow of fuel through the Allow storage area 27. An upper or second Connection 31 is in connection with a cleaning or Starter circuit that pumps fuel to the carburetor 12 allowed. The fuel is the distributor 13 due to the Gravity flows, and it is therefore necessary that the Manifold 13 and tank 7 are properly aligned to the Ensure the function of the fuel system 3. The Storage area 27 remains filled with fuel to sort Liquid seal for the fuel line 11 to the To produce carburetor 12. In this way, air bubbles prevented, which could lead to the performance of the Motors 1 drops, or it even switches off.

Für den Betrieb ist vorgesehen, daß der Halter 5 an dem bestimmten Motor 1 verbleibt, mit dem zusammen er benutzt werden soll. Die Kammer 22 ist so ausgebildet, daß sie den Tank 7 aufnimmt, der eine allgemeine Form besitzt, so daß er mit Motoren 1 verschiedenen Modells und verschiedenen Formen benutzt werden kann. Der Tank 7 bildet eine dichte Einheit, wenn er mit dem zweiten Kupplungsteil 9 zusammengefügt wird. Der Tank 7 wird entweder durch den zweiten Kupplungsteil 9 oder auf eine andere brauchbare Weise mit Kraftstoff gefüllt. Der Kraftstoff wird für den betreffenden Motor 1 optimiert, indem vorgemischtes Öl, oder andere Zusätze hinzugefügt werden, die die Abgase verbessern und die Motorleistung erhöhen. Somit wird der Tank 7 dem Benutzer in einem gebrauchsfertigen Zustand zur Verfügung gestellt, und es ist nicht vorgesehen, ihn an Ort und Stelle nachzufüllen. Auf diese Weise wird für den Benutzer die Notwendigkeit vermieden, ein Kraftstoff-Öl-Gemisch abzumessen und den Tank 7 zu füllen, was Dämpfe, Überlaufen von Kraftstoff und Fehler vermeidet, die normalerweise mit solchen Handlungen einhergehen. Der Tank 7 ist auf dem Halter 5 befestigt und an das Kraftstoffsystem 3 durch ein Einrasten des ersten Kupplungsteils 8 in dem zweiten Kupplungsteil 9 angeschlossen, was auf bequeme Weise den Anschluß und die Trennung des Tanks 7 an bzw. von dem Kraftstoffsystem 3 ermöglicht. Die Aufwendigkeit und die Kosten des Tanks 7 werden durch die Verwendung des Verteilers 13 minimiert, der das Kraftstoffsystem 3 entlüftet und eine Verbindung zu der Kraftstoffleitung 11 zu dem Vergaser 12 herstellt. Der Verteiler 13 stellt auch eine Verbindung der Kraftstoffleitung 10 für den Reinigungs- oder Anlaßkreis zu dem Kraftstoffsystem 3 her. Der Vorratsbereich 27 wird von einem kleinen vergrößerten Bereich des Durchgangs des Verteilers 13 gebildet, der eine kleine Menge des Kraftstoffs zurückhält. Auf diese Weise wird eine konstante Abdichtung der Kraftstoffleitung 11 geschaffen.For operation, it is provided that the holder 5 on the certain engine 1 remains, with which he uses shall be. The chamber 22 is designed to hold the tank 7 records, which has a general shape so that it with Motors 1 different models and different shapes can be used. The tank 7 forms a tight unit, when it is assembled with the second coupling part 9. The tank 7 is either through the second coupling part 9 or filled with fuel in another useful way. The Fuel is optimized for the engine in question by premixed oil, or other additives that are added improve exhaust emissions and increase engine performance. Thus the tank 7 to the user in a ready-to-use condition Provided and it is not intended to put him in place and Refill position. In this way, the Avoided the need to measure a fuel-oil mixture and fill the tank 7, what vapors, fuel spills and avoids mistakes normally associated with such actions accompanied. The tank 7 is attached to the holder 5 and on the fuel system 3 by snapping the first Coupling part 8 connected in the second coupling part 9, which conveniently connects and disconnects the tank 7 to or from the fuel system 3. The Complexity and the cost of the tank 7 are due to the Use of the distributor 13 minimized that Fuel system 3 vented and connected to the Manufactures fuel line 11 to the carburetor 12. The Distributor 13 also connects the fuel line 10 for the cleaning or starting circuit to the fuel system 3 ago. The storage area 27 is of a small size enlarged area of the passage of the distributor 13 is formed, that holds back a small amount of fuel. To this A constant sealing of the fuel line 11 is achieved created.

Auf diese Weise wird ein geeignetes Kraftstoffsystem 3 zur Verfügung gestellt, das einen abgedichteten wegwerfbaren Tank 7 enthält, der ohne Füll- und Mischvorgang benutzt werden kann. Der Kraftstoff selbst kann hinsichtlich der Abgase und der Leistung des Motors 1 optimiert werden. Indem der Tank 7 aus einem wiederverwertbaren Material hergestellt wird, ist der Umwelteinfluß des Kraftstoffsystems bei verringerten Abgasen des Motors 1 gering gehalten.In this way, a suitable fuel system 3 for Provided a sealed disposable tank 7 contains, which can be used without filling and mixing. The fuel itself can in terms of exhaust gases and Motor 1 performance can be optimized. By taking the tank 7 out is made from a recyclable material Environmental impact of the fuel system with reduced emissions of the engine 1 kept low.

Claims (12)

  1. A fuel system (3) of an internal-combustion engine (1) with a fuel line (11) for conveying fuel for combustion purposes and with a tank (7) which can be mounted directly or indirectly on the internal-combustion engine (1) by means of a retaining means (5), wherein the fuel line (11) is connected to a first coupling member (8) and the tank (7) has a second coupling member (9) which can be connected together fluidtightly, and the tank (7) is provided with a first form-locking part (16) and the retaining means (5) is provided with a second form-locking part (23), which can be brought releasably into connection with one another, characterised in that one form-locking part (16) is in the form of a type of projecting shaped flange and the other form-locking part (23) is in the form of a type of slot of T-shaped cross-section which substantially corresponds to the cross-section of the shaped flange (16).
  2. A fuel system according to Claim 1, characterised in that the shaped flange of the first form-locking part (16) projects from the tank (7) and the slot is provided in the retaining means (5).
  3. A fuel system according to Claim 1 or 2, characterised in that the first and/or the second coupling member (8,9) have/has a check valve.
  4. A fuel system according to one or more of the preceding Claims, characterised in that the retaining means (5) is provided with a connection (6) in which the first coupling member (8) is retained.
  5. A fuel system according to one or more of the preceding Claims, characterised in that the tank (7) is filled with fuel mixed ready for use.
  6. A fuel system according to one or more of the preceding Claims, characterised in that the tank (7) consists of a recyclable material.
  7. A fuel system according to one or more of the preceding Claims, characterised by a distributor (13) with a first connection (29) for a fuel line (11) for delivering fuel for the combustion process, with a second connection (31) for a fuel line (10) for a venting and/or starting device and a third connection (30) for the connection to the tank (7).
  8. A fuel system according to Claim 7, characterised in that a storage zone (27) of larger diameter is provided between the first connection (29) and the third connection (30).
  9. A fuel system according to either one of Claims 7 and 8, characterised in that the first connection (29) is disposed below the third connection (30).
  10. A fuel system according to one or more of Claims 7 to 9, characterised in that a venting device separate from the tank (7) is provided, particularly in the distributor (13).
  11. A fuel system according to one or more of Claims 7 to 10, characterised in that the volumetric flow rate incoming through the third connection (30) is higher than that flowing out through the first connection (29).
  12. Use of a fuel system according to one or more of Claims 7 to 11 for an internal-combustion engine in apparatus for tending to property and gardens, in particular strimmers.
EP98116785A 1997-09-30 1998-09-05 Fuel system Expired - Lifetime EP0905373B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/940,210 US5913296A (en) 1997-09-30 1997-09-30 Disposable modular fuel container for internal combustion engines
US940210 1997-09-30

Publications (2)

Publication Number Publication Date
EP0905373A1 EP0905373A1 (en) 1999-03-31
EP0905373B1 true EP0905373B1 (en) 2002-12-04

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JP (1) JP3182400B2 (en)
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CN1745015A (en) * 2002-11-30 2006-03-08 挪威船级社 Vessel structures and structures in marine vessels
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US20080184952A1 (en) * 2005-06-08 2008-08-07 Consumer Ready Products, Llc Composition for powering engine
DE202010004275U1 (en) * 2009-10-13 2011-02-24 Makita Corp., Anjo Device for supplying fuel to an engine

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US5913296A (en) 1999-06-22
JPH11159337A (en) 1999-06-15
DE59806509D1 (en) 2003-01-16
EP0905373A1 (en) 1999-03-31
JP3182400B2 (en) 2001-07-03

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