EP1032759B1 - Fuel supply device for an internal combustion engine - Google Patents
Fuel supply device for an internal combustion engine Download PDFInfo
- Publication number
- EP1032759B1 EP1032759B1 EP99936423A EP99936423A EP1032759B1 EP 1032759 B1 EP1032759 B1 EP 1032759B1 EP 99936423 A EP99936423 A EP 99936423A EP 99936423 A EP99936423 A EP 99936423A EP 1032759 B1 EP1032759 B1 EP 1032759B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- filter
- pressure
- fine filter
- internal combustion
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 10
- 238000011045 prefiltration Methods 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 239000012528 membrane Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/50—Filters arranged in or on fuel tanks
-
- 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
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
-
- 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
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/34—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements by the filter structure, e.g. honeycomb, mesh or fibrous
Definitions
- DE 42 42 242 describes a device for supplying a Internal combustion engine with known fuel in a tank, at the on a conveyor line for the fuel a feed pump and a Fuel filters are arranged.
- DE 36 31 579 C1 relates to a low-pressure fuel circuit Fuel preheating for an air-compression injection internal combustion engine, especially in the commercial vehicle sector.
- a high-pressure injection pump leading flow line is a heat exchanger and a fine filter surrounding bypass with a depending on one due to the fine filter of certain maximum pressure acting upon the formation of paraffin Pressure relief valve arranged.
- DE 38 25 470 A1 has one intended for an internal combustion engine Fuel supply device to the subject.
- Fuel supply device to the subject In one for High pressure injection pump leading flow line is a heat exchanger and at least one fuel filter and one leading to the fuel tank Return line a pressure-controlled control valve arranged. This leads in Dependence on a pressure prevailing upstream of the fuel filter recycled fuel directly into the intake-side supply line.
- DE 1 192 623 B relates to a step filter.
- This essentially includes at least three spaced apart and in a horizontal plane Steps of a filter material graded in its mesh size.
- the stages will be flows in a vertical direction from bottom to top, the first the step below has a larger mesh size than the one above second step.
- a dirt trap is provided between each of two stages and the openings required for the flowing medium are narrow at the top central collar of the dirt trap from one side with its concave side Shielded plate facing the next level.
- the fuel supply device according to the invention with the features of Claim 1 has the advantage that it has a finer filtering of Fuel enables than the previous fuel supply devices for Intake manifold injection without the space requirement of the device increasing significantly or the service life of the filters is reduced.
- FIGS. 1 and 3 each of which schematically represents an exemplary embodiment.
- Figures 2 and 4 show fuel supply devices not according to the invention and serve only explanatory purposes.
- Fig. 1 shows a first example of a device according to the invention Supply of an internal combustion engine with existing in a tank 1 Fuel.
- the device comprises an electric fuel feed pump 2 which is arranged inside the tank 1 and via one in the vicinity thereof Bottom arranged intake manifold 3 sucks fuel.
- a sieve is arranged, which the fuel feed pump before in the suction Protects coarse dirt particles from fuel.
- the sieve may Oppose the flow of the fuel with little resistance, it is therefore usually made of a thin, coarse-mesh membrane Plastic or formed as a wire mesh.
- the mesh size of the Siebes is typically 0.3 mm when the supply device for Diesel fuel is used, and 0.06 mm for petrol.
- the fuel delivery pump forms the starting point of a conveyor line, in its Course of the fuel first through a prefilter 4 with a pore size of approx. 8 - 15 ⁇ m, preferably 10 ⁇ m, flows. This catches the coarser ones Suspended matter or contaminants in the fuel. It is like the feed pump 2 arranged inside the tank.
- the conveyor line also includes a delivery line 5, which extends from the output of the pre-filter 4 a flange 6 to a fine filter arranged outside the tank extends.
- the pore size of the fine filter is expediently in the range 1.5 - 8 ⁇ m and is significantly smaller, e.g. by a factor of 2-4 than that Pore size of the pre-filter 4.
- the filters 4 and 7 are in contrast to the sieve downstream of the feed pump 2, they may have a significantly higher pressure difference during operation attack.
- a line branching off the delivery line leads to a pressure regulator 8.
- the pressure regulator 8 comprises a pressure chamber 9, which branches off Line is connected directly to the supply line 5 and at one Side is limited by a membrane 10. If the pressure in the pressure chamber exceeds a predetermined value, the membrane 10 of a (not shown) seal seat lifted, and fuel flows out of the Pressure chamber 9 back into the tank. In this way a constant pressure is applied the delivery line 5 regardless of the delivery rate of the fuel pump 2 ensured.
- Feed pump 2, pre-filter 4 and pressure regulator 8 are expediently with the Flange 6 through a (not shown) support frame to a module connected, which is removed as a unit from the tank 1 by loosening the flange 6 and can be serviced.
- the illustrated device not according to the invention shown in Fig. 2 comprises the same components as that of FIG substantially. 1.
- the main difference between the two examples is that in Fig. 2 the order of the fine filter 7 and the pressure regulator is reversed. 8
- the fine filter 7 thus follows the pre-filter 4 directly, both of which can be integrated in a uniform housing.
- the arrangement of the pressure regulator behind both filters ensures that the fuel pressure at the carburetor (not shown) is subject to less fluctuations than in the example from FIG. 1, since it does not depend on a throughput-dependent pressure drop in the fine filter 7.
- the pressure regulator 8 shown separately from the flange 6 in the schematic FIG. 2 is expediently mounted directly on the flange 6.
- a sensor 11 detects the pressure the delivery line 5, and a control circuit 12 controls the delivery rate of the Feed pump 2 such that the pressure detected by the sensor 11 essentially remains constant at a target pressure in a range of approx. 3 to 5 bar.
- On Pressure relief valve 13 in a line branching off the delivery line 5 is like this set to open at a pressure that significantly exceeds the set pressure, e.g. approx. 10 bar. It is used in the event of a pressure control malfunction To prevent the occurrence of overpressures on the delivery line 5, which otherwise could possibly cause the delivery line to leak.
- the how in the example of Fig. 1 arranged outside the tank 1 fine filter 7 is easy to Accessible for maintenance purposes and can be replaced if it is clogged should.
- the pre-filter 4 inside the tank can be designed as a lifetime filter his.
- the arrangement of the sensor 11 may vary from the point of view of expediency deviations shown here, e.g. it can be arranged downstream of the fine filter 7 be, or it can be arranged directly at the outlet of the feed pump 2, wherein in the latter case sensor 11 and control circuit 12 expediently in the housing the feed pump 2 are integrated.
- the device according to FIG. 4 not according to the invention differs from that according to FIG. 3 in that the fine filter 7 is arranged inside the tank 1 and that the pressure relief valve 13 branches off from the delivery line 5 downstream of the fine filter 7.
- a pressure relief valve, the delivery pumps fuel is integrated in the housing of which usually directly at the output of conventional, in order to limit its output pressure, can be omitted in the embodiment shown in Fig. 3 Fuel feed pump, since its function is taken over by the overpressure valve 13. Alternatively, the pressure relief valve 13 can be omitted if a pressure relief valve integrated in the housing of the feed pump 2 is provided.
- prefilter 4 and fine filter 7 are spatially separated from one another separate units are shown.
- both filters can also be made as one piece Filter body be formed, the pore size of a coarse-pored, a pre-filter area to a fine-pored, a Fine filter forming area gradually or gradually decreases.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtration Of Liquid (AREA)
- Fuel-Injection Apparatus (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
Die Erfindung geht aus von einer Vorrichtung nach der Gattung des Hauptanspruchs. Aus DE 42 42 242 ist eine Vorrichtung zur Versorgung einer Brennkraftmaschine mit in einem Tank vorhandenem Kraftstoff bekannt, bei der an einer Förderstrecke für den Kraftstoff eine Förderpumpe und ein Kraftstoffilter angeordnet sind.The invention relates to a device according to the preamble of the main claim. DE 42 42 242 describes a device for supplying a Internal combustion engine with known fuel in a tank, at the on a conveyor line for the fuel a feed pump and a Fuel filters are arranged.
Kraftstoffversorgungssysteme für die Direkteinspritzung in die Zylinder einer Brennkraftmaschine erfordern eine feinere Filtrierung des Kraftstoffes als herkömmliche Systeme mit Saugrohreinspritzung. Während bei Systemen für Saugrohreinspritzung Filter-Porenweiten von 10 µm ausreichend sind, werden für die Direkteinspritzung Porenweiten von ca. 3 µm benötigt.Fuel supply systems for direct injection into one cylinder Internal combustion engines require a finer filtration of the fuel than conventional systems with intake manifold injection. While systems for Intake manifold injection filter pore sizes of 10 µm are sufficient pore sizes of approx. 3 µm are required for direct injection.
Wenn in einer bestehenden Kraftstoffversorgungseinrichtung für Saugrohreinspritzung lediglich die Porenweite des verwendeten Filters verringert wird, so hat dies die Folge, daß der Filter in erheblich kürzerer Zeit verstopft und ausgewechselt werden muß. Dies führt für den Betreiber der Brennkraftmaschine zu erhöhten Wartungskosten und Ausfallzeiten.If in an existing fuel supply system for intake manifold injection only the pore size of the filter used is reduced, this has the consequence that the filter clogs in a considerably shorter time and needs to be replaced. This leads to the operator of the internal combustion engine at increased maintenance costs and downtimes.
Das Bedürfnis der Betreiber nach einem Kraftstoffilter mit langen Standzeiten kann bislang nur dadurch erfüllt werden, daß Filter mit entsprechend der Verringerung ihrer Porengröße erhöhten Abmessungen verwendet werden. The operator's need for a fuel filter with a long service life can only be met so far that filters with the Reducing their pore size increased dimensions can be used.
Der erhöhte Platzbedarf dieser Filter ist wiederum nachteilig, insbesondere bei Brennkraftmaschinen für Kraftfahrzeuge, wo auf eine kompakte Konstruktion besonderer Wert gelegt wird.The increased space requirement of these filters is again disadvantageous, particularly in the case of Internal combustion engines for motor vehicles, where on a compact construction special value is placed.
DE 36 31 579 C1 bezieht sich auf einen Niederdruck-Kraftstoffkreislauf mit Kraftstoffvorwärmung für eine luftverdichtende Einspritz-Brennkraftmaschine, insbesondere im Nutzfahrzeugbereich. In einer zur Hochdruckeinspritzpumpe führenden Vorlaufleitung ist ein Wärmetauscher und ein einen Feinfilter umgebender Bypass mit einem in Abhängigkeit von einem auf das Feinfilter infolge von Paraffinbildung einwirkenden bestimmten Maximaldruck öffnenden Überdruckventil angeordnet.DE 36 31 579 C1 relates to a low-pressure fuel circuit Fuel preheating for an air-compression injection internal combustion engine, especially in the commercial vehicle sector. In a high-pressure injection pump leading flow line is a heat exchanger and a fine filter surrounding bypass with a depending on one due to the fine filter of certain maximum pressure acting upon the formation of paraffin Pressure relief valve arranged.
DE 38 25 470 A1 hat eine für eine Brennkraftmaschine vorgesehene Kraftstoffversorgungseinrichtung zum Gegenstand. In einer zur Hochdruckeinspritzpumpe führenden Vorlaufleitung ist ein Wärmetauscher und mindestens ein Kraftstofffilter und in einer zum Kraftstoffbehälter führenden Rücklaufleitung ein druckgeregeltes Steuerventil angeordnet. Dieses leitet in Abhängigkeit von einem stromauf des Kraftstofffilters herrschenden Druck rückgeführten Kraftstoff direkt in die saugseitige Vorlaufleitung über.DE 38 25 470 A1 has one intended for an internal combustion engine Fuel supply device to the subject. In one for High pressure injection pump leading flow line is a heat exchanger and at least one fuel filter and one leading to the fuel tank Return line a pressure-controlled control valve arranged. This leads in Dependence on a pressure prevailing upstream of the fuel filter recycled fuel directly into the intake-side supply line.
DE 1 192 623 B bezieht sich auf einen Stufenfilter. Dieser umfasst im Wesentlichen mindestens drei in Abstand voneinander und in horizontaler Ebene angeordnete Stufen eines in seiner Maschenweite abgestuften Filtermaterials. Die Stufen werden in lotrechter Richtung von unten nach oben durchströmt, wobei die erste untenliegende Stufe eine größere Maschenweite aufweist als die darüberliegende zweite Stufe. Zwischen zwei Stufen ist jeweils ein Schmutzfang vorgesehen und die für das strömende Medium erforderlichen Öffnungen sind am obersten engen zentralen Kragen des Schmutzfanges von einem mit seiner konkaven Seite nach oben zur nächsten Stufe gerichteten Teller abgeschirmt.DE 1 192 623 B relates to a step filter. This essentially includes at least three spaced apart and in a horizontal plane Steps of a filter material graded in its mesh size. The stages will be flows in a vertical direction from bottom to top, the first the step below has a larger mesh size than the one above second step. A dirt trap is provided between each of two stages and the openings required for the flowing medium are narrow at the top central collar of the dirt trap from one side with its concave side Shielded plate facing the next level.
Die erfindungsgemäße Kraftstoffversorgungsvorrichtung mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß sie eine feinere Filterung des Kraftstoffes ermöglicht als die bisherigen Kraftstoffversorgungsvorrichtungen für Saugrohreinspritzung, ohne daß der Platzbedarf der Vorrichtung wesentlich zunimmt oder die Standzeit der Filter verkürzt wird.The fuel supply device according to the invention with the features of Claim 1 has the advantage that it has a finer filtering of Fuel enables than the previous fuel supply devices for Intake manifold injection without the space requirement of the device increasing significantly or the service life of the filters is reduced.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Kraftstoffversorgungsvorrichtung möglich.The measures listed in the subclaims are advantageous Developments and improvements to those specified in the main claim Fuel supply device possible.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen mit Bezug auf die beigefügten Fig. 1 und 3, die jeweils schematisch ein Ausfühnangsbeispiel darstellen. Die Figuren 2 und 4 zeigen nicht erfindungsgemäße Kraftstoffversorgungseinrichtungen und dienen lediglich Erklärungszwecken. Further features and advantages of the invention result from the following description of exemplary embodiments with reference to the attached FIGS. 1 and 3 , each of which schematically represents an exemplary embodiment. Figures 2 and 4 show fuel supply devices not according to the invention and serve only explanatory purposes.
Fig. 1 zeigt ein erstes Beispiel einer erfindungsgemäßen Vorrichtung zur
Versorgung einer Brennkraftmaschine mit in einem Tank 1 vorhandenem
Kraftstoff. Die Vorrichtung umfaßt eine elektrische Kraftstoff-Förderpumpe 2, die
im Innem des Tanks 1 angeordnet ist und über einen in der Nähe von dessen
Boden angeordneten Ansaugstutzen 3 Kraftstoff ansaugt. In dem Ausgangsstutzen
3 ist ein Sieb angeordnet, das die Kraftstoff-Förderpumpe vor im angesaugten
Kraftstoff mitgeführten groben Schmutzpartikeln schützt. Das Sieb darf der
Strömung des Kraftstoffs nur geringen Widerstand entgegensetzen,
es ist deshalb meist als dünne grobmaschige Membran aus
Kunststoff oder als ein Drahtgeflecht ausgebildet. Die Maschenweite des
Siebes beträgt typischerweise 0.3 mm, wenn die Versorgungsvorrichtung für
Dieselkraftstoff eingesetzt wird, und 0.06 mm für Ottokraftstoff. Die Kraftstoff-Förderpumpe
bildet den Ausgangspunkt einer Förderstrecke, in deren
Verlauf der Kraftstoff zunächst durch einen Vorfilter 4 mit einer Porenweite
von ca. 8 - 15 µm, vorzugsweise 10 µm, strömt. Dieser fängt die gröberen
Schwebstoffe oder Verunreinigungen im Kraftstoff ab. Er ist wie die Förderpumpe
2 innerhalb des Tanks angeordnet. Die Förderstrecke umfaßt weiterhin
eine Förderleitung 5, die sich vom Ausgang des Vorfilters 4 durch
einen Flansch 6 zu einem außerhalb des Tanks angeordneten Feinfilter
erstreckt. Die Porenweite des Feinfilters liegt zweckmäßigerweise im Bereich
1,5 - 8 µm und ist deutlich geringer, z.B. um einen Faktor 2 - 4, als die
Porenweite des Vorfilters 4. Bei einer Porenweite des Vorfilters von 10 µM
ist ein Wert von ca. 3 µm für den Feinfilter zweckmäßig. Da dieser
Feinfilter nur von bereits vorgefiltertem Kraftstoff durchflossen wird, verstopft
er weniger schnell als ein herkömmlicher einstufiger Filter und kann
deshalb in seinen Abmessungen klein gehalten werden. Vom Ausgang des
Feinfilters 7 führt die Förderstrecke weiter zum Vergaser der Brennkraftmaschine
(nicht dargestellt).Fig. 1 shows a first example of a device according to the invention
Supply of an internal combustion engine with existing in a tank 1
Fuel. The device comprises an electric
Da die Filter 4 und 7 im Gegensatz zum Sieb stromabwärts von der Förderpumpe
2 liegen, darf an ihnen im Betrieb eine erheblich höhere Druckdifferenz
anfallen.Since the filters 4 and 7 are in contrast to the sieve downstream of the
Eine von der Förderleitung abzweigende Leitung führt zu einem Druckregler
8. Der Druckregler 8 umfaßt eine Druckkammer 9, die über die abzweigende
Leitung mit der Versorgungsleitung 5 direkt verbunden ist und an einer
Seite durch eine Membran 10 begrenzt ist. Wenn der Druck in der Druckkammer
einen vorgegebenen Wert übersteigt, wird die Membran 10 von
einem (nicht dargestellten) Dichtungssitz abgehoben, und Kraftstoff fließt aus der
Druckkammer 9 zurück in den Tank. Auf diese Weise wird ein konstanter Druck auf
der Förderleitung 5 unabhängig von der Förderleistung der Kraftstoffpumpe 2
sichergestellt.A line branching off the delivery line leads to a
Förderpumpe 2, Vorfilter 4 und Druckregler 8 sind zweckmäßigerweise mit dem
Flansch 6 durch einen (nicht dargestellten) Trägerrahmen zu einem Modul
verbunden, das durch Lösen des Flansches 6 als Einheit aus dem Tank 1 entnommen
und gewartet werden kann.Feed
Die in Fig. 2 gezeigte dargestellte nicht erfindungsgemäße Vorrichtung umfaßt im Wesentlichen dieselben Komponenten wie diejenige aus Fig. 1. Der wesentliche Unterschied zwischen den beiden Beispielen ist, daß in Fig. 2 die Reihenfolge von Feinfilter 7 und Druckregler 8 vertauscht ist. Der Feinfilter 7 folgt somit direkt auf den Vorfilter 4, beide können in einem einheitlichen Gehäuse integriert sein. Durch die Anordnung des Druckreglers hinter beiden Filtern wird erreicht, daß der am (nicht gezeigten) Vergaser anstehende Kraftstoffdruck geringeren Schwankungen unterliegt als beim Beispiel aus Fig. 1, da er nicht von einem durchsatzabhängigen Druckabfall im Feinfilter 7 abhängt. The illustrated device not according to the invention shown in Fig. 2 comprises the same components as that of FIG substantially. 1. The main difference between the two examples is that in Fig. 2 the order of the fine filter 7 and the pressure regulator is reversed. 8 The fine filter 7 thus follows the pre-filter 4 directly, both of which can be integrated in a uniform housing. The arrangement of the pressure regulator behind both filters ensures that the fuel pressure at the carburetor (not shown) is subject to less fluctuations than in the example from FIG. 1, since it does not depend on a throughput-dependent pressure drop in the fine filter 7.
Der in der schematischen Fig. 2 vom Flansch 6 getrennt dargestellte Druckregler 8
ist zweckmäßigerweise direkt am Flansch 6 montiert.The
Beim in Fig. 3 gezeigten Ausführungsbeispiel erfaßt ein Sensor 11 den Druck auf
der Förderleitung 5, und eine Regelschaltung 12 regelt die Förderleistung der
Förderpumpe 2 derart, daß der vom Sensor 11 erfaßte Druck im wesentlichen
konstant bei einem Solldruck in einem Bereich von ca. 3 bis 5 bar bleibt. Ein
Überdruckventil 13 in einer von der Förderleitung 5 abzweigenden Leitung ist so
eingestellt, daß es bei einem Druck öffnet, der den Solldruck wesentlich übersteigt,
z.B. ca. 10 bar. Es dient dazu, im Falle einer Störung der Druckregelung das
Auftreten von Überdrücken auf der Förderleitung 5 zu unterbinden, die sonst
möglicherweise zu einem Undichtwerden der Förderleitung führen könnten. Der wie
beim Beispiel der Fig. 1 außerhalb des Tanks 1 angeordnete Feinfilter 7 ist leicht zu
Wartungszwecken zugänglich und kann ausgetauscht werden, wenn er verstopft sein
sollte. Der Vorfilter 4 innerhalb des Tanks kann als Lebensdauer-Filter ausgelegt
sein.In the embodiment shown in FIG. 3, a
Die Anordnung des Sensors 11 kann nach Zweckmäßigkeitsgesichtspunkten von der
hier gezeigten abweichen, z.B. kann er stromabwärts vom Feinfilter 7 angeordnet
sein, oder er kann direkt am Ausgang der Förderpumpe 2 angeordnet sein, wobei in
letzterem Fall Sensor 11 und Regelschaltung 12 zweckmäßigerweise in das Gehäuse
der Förderpumpe 2 integriert sind.The arrangement of the
Die nicht erfindungsgemäße Vorrichtung gemäß Figur 4 unterscheidet sich von derjenigen gemäß Figur 3
darin, dass der Feinfilter 7 innerhalb des Tanks 1 angeordnet ist, und daß das
Überdruckventil 13 stromabwärts vom Feinfilter 7 von der Förderleitung 5
abzweigt. The device according to FIG. 4 not according to the invention differs from that according to FIG. 3 in that the fine filter 7 is arranged inside the tank 1 and that the
Ein Überdruckventil, das üblicherweise direkt am Ausgang von herkömmlichen
Kraftstoff-Förderpumpen in deren Gehäuse integriert ist, um ihren Ausgabedruck zu
begrenzen, kann bei der in Fig. 3 gezeigten Kraftstoff-Förderpumpe entfallen, da
seine Funktion vom Überdruckventil 13 übernommen wird. Alternativ kann das
Überdruckventil 13 entfallen, wenn ein in das Gehäuse der Förderpumpe 2
integriertes Überdruckventil vorgesehen ist.A pressure relief valve, the delivery pumps fuel is integrated in the housing of which usually directly at the output of conventional, in order to limit its output pressure, can be omitted in the embodiment shown in Fig. 3 Fuel feed pump, since its function is taken over by the
In den Beispielen sind Vorfilter 4 und Feinfilter 7 als voneinander räumlich getrennte Einheiten dargestellt. Es können aber auch beide Filter als ein einteiliger Filterkörper ausgebildet sein, dessen Porenweite von einem grobporigen, einen Vorfilter bildenden Bereich zu einem feinporigen, einen Feinfilter bildenden Bereich allmählich oder stufenweise abnimmt.In the examples, prefilter 4 and fine filter 7 are spatially separated from one another separate units are shown. However, both filters can also be made as one piece Filter body be formed, the pore size of a coarse-pored, a pre-filter area to a fine-pored, a Fine filter forming area gradually or gradually decreases.
Claims (6)
- Device for supplying an internal combustion engine with fuel present in a tank (1), in which a feed route for the fuel runs from a feed pump (2) through a fuel filter containing a prefilter (4) and a fine filter (7), characterized in that a pressure-limiting element (8, 13) is arranged on the feed route between the prefilter (4) and the fine filter (7).
- Device according to Claim 1, characterized in that the fine filter has a pore width of 1.5 to 8 µm.
- Device according to Claim 2, characterized in that the prefilter has a greater pore width than the fine filter in the range of 7 to 15 µm.
- Device according to one of Claims 1 to 3, characterized in that the prefilter (4) and the fine filter (7) are designed in such a way that at least the prefilter (4) can be built into the tank (1).
- Device according to one of Claims 1 to 4, characterized in that it is return-free.
- Device according to one of Claims 1 to 5, characterized by a sieve through which the feed pump (2) sucks in fuel from the tank (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19828931 | 1998-06-29 | ||
| DE19828931A DE19828931A1 (en) | 1998-06-29 | 1998-06-29 | Fuel supply system with pumped fuel filters |
| PCT/DE1999/001663 WO2000000736A1 (en) | 1998-06-29 | 1999-06-08 | Fuel supply device for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1032759A1 EP1032759A1 (en) | 2000-09-06 |
| EP1032759B1 true EP1032759B1 (en) | 2003-11-19 |
Family
ID=7872362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99936423A Expired - Lifetime EP1032759B1 (en) | 1998-06-29 | 1999-06-08 | Fuel supply device for an internal combustion engine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6253740B1 (en) |
| EP (1) | EP1032759B1 (en) |
| JP (1) | JP2002519569A (en) |
| KR (1) | KR20010023386A (en) |
| DE (2) | DE19828931A1 (en) |
| ES (1) | ES2212594T3 (en) |
| WO (1) | WO2000000736A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010043644A1 (en) | 2010-11-09 | 2012-05-10 | Mahle International Gmbh | Fuel supply system for use in internal combustion engine of motor car, has filter and pump arranged between tank areas, and another pump and another filter arranged between one of areas and engine, where former filter has water separator |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19936287C2 (en) * | 1999-08-02 | 2003-04-30 | Bosch Gmbh Robert | Demand control for a fuel delivery module with variable system pressure |
| DE10013905A1 (en) * | 2000-03-21 | 2001-09-27 | Mannesmann Vdo Ag | Conveying device for conveying fuel |
| FR2823660A1 (en) | 2001-04-18 | 2002-10-25 | Pneumopartners | Analysis system for respiratory sounds includes sampling and processing module producing sound parameters for comparison with database |
| GB0205965D0 (en) * | 2002-03-14 | 2002-04-24 | Delphi Tech Inc | Fuel system |
| US6817344B2 (en) * | 2002-12-30 | 2004-11-16 | Caterpillar Inc | Fuel supply system |
| US20050061372A1 (en) * | 2003-09-23 | 2005-03-24 | Mcgrath Dennis P. | Pressure regulator assembly |
| US6953026B2 (en) * | 2003-10-16 | 2005-10-11 | Visteon Global Technologies, Inc. | Pressure regulating valve for automotive fuel system |
| US7302938B2 (en) * | 2003-10-16 | 2007-12-04 | Ford Motor Company | Mechanical returnless fuel system |
| ITRE20050095A1 (en) * | 2005-07-29 | 2007-01-30 | Ufi Filters Spa | COMBINED FUEL FILTER |
| DE202006002952U1 (en) * | 2006-02-22 | 2007-07-05 | Mann + Hummel Gmbh | fluid system |
| DE102007000855B4 (en) * | 2006-12-27 | 2020-06-10 | Denso Corporation | Fuel delivery device and storage fuel injection system having this |
| KR101131326B1 (en) * | 2007-03-29 | 2012-04-04 | 혼다 기켄 고교 가부시키가이샤 | Vehicle fuel supply device and fuel filter structure |
| JP2009144542A (en) * | 2007-12-12 | 2009-07-02 | Aisan Ind Co Ltd | Fuel feeding device |
| US7753033B2 (en) * | 2008-09-05 | 2010-07-13 | Delphi Technologies, Inc. | Fuel module with orifice upstream from regulator |
| US7757672B2 (en) * | 2008-09-15 | 2010-07-20 | Gm Global Technology Operations, Inc. | Anti-clogging fuel pump module |
| US9051906B2 (en) * | 2012-02-29 | 2015-06-09 | Ford Global Technologies, Llc | Diesel fuel system conditioning |
| US11333115B2 (en) * | 2015-11-20 | 2022-05-17 | Clark Equipment Company | Fuel recirculation method and valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1192623B (en) * | 1962-03-20 | 1965-05-13 | Gustav Eisermann | Step filter |
| DE3825470A1 (en) * | 1988-07-27 | 1990-02-01 | Daimler Benz Ag | Fuel supply device provided for an internal combustion engine |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3631579C1 (en) * | 1986-09-17 | 1992-02-20 | Daimler Benz Ag | Low-pressure fuel circuit with fuel preheating for an air-compressing injection engine, in particular for commercial vehicles |
| DE4224981C2 (en) * | 1992-07-29 | 2003-06-26 | Bosch Gmbh Robert | Device for delivering fuel from a storage tank to the internal combustion engine of a motor vehicle |
| DE4242242C2 (en) | 1992-12-15 | 2003-04-30 | Bosch Gmbh Robert | Device for supplying the internal combustion engine of a motor vehicle with fuel present in a storage tank |
| US5330475A (en) * | 1993-11-29 | 1994-07-19 | General Motors Corporation | Modular fuel sender for motor vehicle |
| US5415146A (en) * | 1993-12-14 | 1995-05-16 | Walbro Corporation | Supplemental in-tank filter |
| DE4420043C1 (en) * | 1994-06-08 | 1995-09-14 | Kraft Herbert Georgsdorf | Diesel engine fuel injection system |
| JP3556983B2 (en) * | 1994-12-28 | 2004-08-25 | トヨタ自動車株式会社 | Fuel supply device for internal combustion engine |
| KR100298617B1 (en) * | 1995-02-03 | 2002-07-31 | 가부시키가이샤 덴소 | Fuel supply system and its supporting unit |
| JPH08261084A (en) * | 1995-03-20 | 1996-10-08 | Nippondenso Co Ltd | Fuel supply device of internal combustion engine |
| JPH08338335A (en) * | 1995-06-09 | 1996-12-24 | Nippondenso Co Ltd | Fuel feeding device for internal combustion engine |
| DE19605952A1 (en) * | 1996-02-17 | 1997-08-21 | Bosch Gmbh Robert | Quick-change filter for internal combustion engine fuel supply |
-
1998
- 1998-06-29 DE DE19828931A patent/DE19828931A1/en not_active Ceased
-
1999
- 1999-06-08 ES ES99936423T patent/ES2212594T3/en not_active Expired - Lifetime
- 1999-06-08 KR KR1020007002026A patent/KR20010023386A/en not_active Withdrawn
- 1999-06-08 US US09/485,984 patent/US6253740B1/en not_active Expired - Fee Related
- 1999-06-08 WO PCT/DE1999/001663 patent/WO2000000736A1/en not_active Ceased
- 1999-06-08 DE DE59907797T patent/DE59907797D1/en not_active Expired - Fee Related
- 1999-06-08 JP JP2000557072A patent/JP2002519569A/en active Pending
- 1999-06-08 EP EP99936423A patent/EP1032759B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1192623B (en) * | 1962-03-20 | 1965-05-13 | Gustav Eisermann | Step filter |
| DE3825470A1 (en) * | 1988-07-27 | 1990-02-01 | Daimler Benz Ag | Fuel supply device provided for an internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010043644A1 (en) | 2010-11-09 | 2012-05-10 | Mahle International Gmbh | Fuel supply system for use in internal combustion engine of motor car, has filter and pump arranged between tank areas, and another pump and another filter arranged between one of areas and engine, where former filter has water separator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002519569A (en) | 2002-07-02 |
| WO2000000736A1 (en) | 2000-01-06 |
| ES2212594T3 (en) | 2004-07-16 |
| DE19828931A1 (en) | 1999-12-30 |
| KR20010023386A (en) | 2001-03-26 |
| DE59907797D1 (en) | 2003-12-24 |
| EP1032759A1 (en) | 2000-09-06 |
| US6253740B1 (en) | 2001-07-03 |
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