DE9214254U1 - Fuel supply device for a fuel injection system - Google Patents
Fuel supply device for a fuel injection systemInfo
- Publication number
- DE9214254U1 DE9214254U1 DE9214254U DE9214254U DE9214254U1 DE 9214254 U1 DE9214254 U1 DE 9214254U1 DE 9214254 U DE9214254 U DE 9214254U DE 9214254 U DE9214254 U DE 9214254U DE 9214254 U1 DE9214254 U1 DE 9214254U1
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- supply device
- gas separation
- separation chamber
- line
- 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
Links
- 239000000446 fuel Substances 0.000 title claims description 38
- 238000002347 injection Methods 0.000 title claims description 14
- 239000007924 injection Substances 0.000 title claims description 14
- 238000000926 separation method Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 5
- 239000002775 capsule Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
- F02M37/00—Apparatus 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
- F02M37/20—Apparatus 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 characterised by means for preventing vapour lock
-
- 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
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
M 2788/I/acM 2788/I/ac
Kraftstoffversorgungseinrichtung für eine KraftstoffeinspritzanlageFuel supply device for a fuel injection system
Kraftstoffversorgungseinrichtungen für Kraftstoffeinspritzanlagen werden zu deren Kühlung und zur Abfuhr von Dampfblasen während des Betriebs mit Kraftstoff durchspült. Das heißt, die Kraftstoff-Förderpumpe stellt eine größere Menge Kraftstoff bereit, als vom Motor benötigt wird. Diese Mehrmenge wird über eine Leitung zum Tank zurückgeführt und dient zur Wärmeabfuhr und zur Abfuhr von Kraftstoff-Dampfblasen. Dampfblasen entstehen im Motorbetrieb durch Wärmeeinwirkung und können die Funktion der Einspritzanlage stören oder gar verhindern. Auch ein erneutes Starten des noch betriebswarmen Motors kann durch Dampfblasen erschwert oder gar verhindert werden.Fuel supply devices for fuel injection systems are flushed with fuel during operation to cool them and to remove vapor bubbles. This means that the fuel feed pump provides a larger amount of fuel than the engine needs. This excess amount is returned to the tank via a line and is used to dissipate heat and to remove fuel vapor bubbles. Vapor bubbles are created during engine operation due to the effects of heat and can disrupt or even prevent the injection system from functioning. Vapor bubbles can also make it difficult or even impossible to restart an engine that is still warm.
Bei bestimmten Motoranwendungen, z. B. als Außenbordmotor an Booten, ist jedoch eine Rückleitung zum Tank aus Sicherheitsgründen vom Gesetzgeber nicht zugelassen.However, for certain engine applications, e.g. as an outboard motor on boats, a return line to the tank is not permitted by law for safety reasons.
Aufgabe der Erfindung ist, eine Kraftstoffversorgungseinrichtung, für eine Kraftstoffeinspritzanlage ohne Rückleitung zum Tank zu schaffen, bei der dennoch Wärme und Dampfblasen abgeführt werden können.The object of the invention is to create a fuel supply device for a fuel injection system without a return line to the tank, in which heat and vapor bubbles can nevertheless be dissipated.
Die Erfindung löst dieses Problem durch Verwendung einer zweiten Kraftstoffpumpe, einer Gasabscheidekammer mit Schwimmventil und einem Kühler. Diese Anordnung kann direkt am Motor angebracht werden und vermeidet damit unter Druck stehende Kraftstoffleitungen außerhalb des Motorraumes oder der Motorkapsel. Damit ist den gesetzlichen Sicherheitsbestimmungen genüge getan.The invention solves this problem by using a second fuel pump, a gas separation chamber with a float valve and a cooler. This arrangement can be attached directly to the engine and thus avoids pressurized fuel lines outside the engine compartment or the engine capsule. This satisfies the legal safety regulations.
Anhand der Zeichnung wird die Erfindung im folgenden beispielhaft näher erläutert.The invention is explained in more detail below with reference to the drawing.
Eine Pumpe 1 saugt den Kraftstoff 2 aus dem Tank 3 und führt ihn durch eine Kraftstoffleitung 4 einer Gasabscheidekammer 5 zu. Die Gasabscheidekammer 5 weist einen Schwimmer 6 auf, der ein Entlüftungsventil 7 bedient, das auf eine im Deckenbereich oberhalb des Flüssigkeitsspiegels 5a angeordnete Gasabführleitung 8 einwirkt.A pump 1 sucks the fuel 2 out of the tank 3 and feeds it through a fuel line 4 to a gas separation chamber 5. The gas separation chamber 5 has a float 6 that operates a vent valve 7 that acts on a gas discharge line 8 arranged in the ceiling area above the liquid level 5a.
Vom Boden der Gasabscheidekammer 5 ist eine Kraftstoffleitung 9 abgezweigt, die mit einer Pumpe 10 in Verbindung steht und zu einem Einspritzventil 11 führt, das über eine KraftstoffleitungA fuel line 9 branches off from the bottom of the gas separation chamber 5, which is connected to a pump 10 and leads to an injection valve 11, which is connected via a fuel line
12 mit dem Gasabscheidebehälter 5 verbunden ist, die oberhalb des Flüssigkeitsspiegels 5a in den Gasabscheidebehälter 5 mündet. In der Kraftstoffleitung 12 sitzt in der Folge vom Einspritzventil 11 ausgehend ein Druckregler 13 und ein Kühler 14.12 is connected to the gas separation tank 5, which opens into the gas separation tank 5 above the liquid level 5a. In the fuel line 12, starting from the injection valve 11, there is a pressure regulator 13 and a cooler 14.
Die neue Kraftstoffversorgungseinrichtung für eine Kraftstoffeinspritzanlage funktioniert wie folgt:The new fuel supply device for a fuel injection system works as follows:
Die Pumpe 1 saugt den Kraftstoff 2 aus dem Tank 3 und führt ihn der Gasabscheidekammer 5 zu, bis das Entlüftungsventil 7 vom Schwimmer 6 geschlossen wird. Die Pumpe 10 entnimmt am Boden der Gasabscheidekammer 5 den Kraftstoff und baut vor dem DruckreglerThe pump 1 sucks the fuel 2 from the tank 3 and feeds it to the gas separation chamber 5 until the vent valve 7 is closed by the float 6. The pump 10 takes the fuel from the bottom of the gas separation chamber 5 and builds upstream of the pressure regulator
13 den für das jeweilige Einspritzsystem erforderlichen Druck auf. In ihrer Fördercharakteristik ist die Pumpe 10 so ausgelegt, daß sie die zur Kühlung und Durchspülung des Einspritzventils 11 erforderliche Menge an Kraftstoff aufbringt und über den Kühler 14 der Gasabscheidekammer 5 zuführt. Werden nun Dampfblasen 5b in die Gasabscheidekammer 5 abgeführt, so wird das Kraftstoffniveau 5a sinken, der Schwimmer 6 öffnet das Entlüftungsventil 7 solange, bis die Pumpe 1 zum ursprünglichen Niveau 5a nachgefördert hat. Das Entlüftungsventil 7 steht in Verbindung mit dem Luftansaugrohr 8 des Motors, so daß die aus dem Luftansaugrohr abgezogenen Kraftstoffdämpfe nicht unverbrannt in die Umwelt gelangen können.13 to the pressure required for the respective injection system. The pump 10 is designed in its delivery characteristics so that it supplies the amount of fuel required to cool and flush the injection valve 11 and supplies it to the gas separation chamber 5 via the cooler 14. If vapor bubbles 5b are now discharged into the gas separation chamber 5, the fuel level 5a will drop, the float 6 opens the vent valve 7 until the pump 1 has pumped up to the original level 5a. The vent valve 7 is connected to the air intake pipe 8 of the engine so that the fuel vapors extracted from the air intake pipe cannot escape into the environment unburned.
Claims (5)
gekennzeichnet durch1. Fuel supply device for a fuel injection system for an engine, in particular for an outboard engine on boats,
marked by
dadurch gekennzeichnet,2. Fuel supply device according to claim 1,
characterized,
daß die Entlüftungsleitung (8) oberhalb des Flüssigkeitsspiegels (5a) in die Gasabscheidekammer (5) mündet. characterized,
that the vent line (8) opens into the gas separation chamber (5) above the liquid level (5a).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9214254U DE9214254U1 (en) | 1992-10-21 | 1992-10-21 | Fuel supply device for a fuel injection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9214254U DE9214254U1 (en) | 1992-10-21 | 1992-10-21 | Fuel supply device for a fuel injection system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE9214254U1 true DE9214254U1 (en) | 1994-02-24 |
Family
ID=6885087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE9214254U Expired - Lifetime DE9214254U1 (en) | 1992-10-21 | 1992-10-21 | Fuel supply device for a fuel injection system |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE9214254U1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998031931A1 (en) * | 1997-01-14 | 1998-07-23 | Dolmar Gmbh | Venting device for the fuel-supply system of an internal combustion engine |
EP0995897A2 (en) * | 1998-10-21 | 2000-04-26 | Toyota Jidosha Kabushiki Kaisha | High-pressure fuel supplying apparatus and method for internal combustion engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4113001A1 (en) * | 1991-04-20 | 1992-10-22 | Vdo Schindling | Two=stage fuel pump for IC engine - has sliding vane first stage to pump fuel containing gas bubbles |
-
1992
- 1992-10-21 DE DE9214254U patent/DE9214254U1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4113001A1 (en) * | 1991-04-20 | 1992-10-22 | Vdo Schindling | Two=stage fuel pump for IC engine - has sliding vane first stage to pump fuel containing gas bubbles |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998031931A1 (en) * | 1997-01-14 | 1998-07-23 | Dolmar Gmbh | Venting device for the fuel-supply system of an internal combustion engine |
EP0995897A2 (en) * | 1998-10-21 | 2000-04-26 | Toyota Jidosha Kabushiki Kaisha | High-pressure fuel supplying apparatus and method for internal combustion engine |
EP0995897A3 (en) * | 1998-10-21 | 2003-05-21 | Toyota Jidosha Kabushiki Kaisha | High-pressure fuel supplying apparatus and method for internal combustion engine |
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