DE102005060793A1 - Fuel supply system is connected to engine injection system with its flat linear characteristic line adapted to same with amount of fuel delivered to header pipe corresponding to maximum fuel consumption of engine at lowest pressure - Google Patents

Fuel supply system is connected to engine injection system with its flat linear characteristic line adapted to same with amount of fuel delivered to header pipe corresponding to maximum fuel consumption of engine at lowest pressure Download PDF

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Publication number
DE102005060793A1
DE102005060793A1 DE200510060793 DE102005060793A DE102005060793A1 DE 102005060793 A1 DE102005060793 A1 DE 102005060793A1 DE 200510060793 DE200510060793 DE 200510060793 DE 102005060793 A DE102005060793 A DE 102005060793A DE 102005060793 A1 DE102005060793 A1 DE 102005060793A1
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DE
Germany
Prior art keywords
fuel
supply system
engine
fuel supply
injection system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE200510060793
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German (de)
Inventor
Joachim Günther
Rainer SCHRÖCKER
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.)
Dr Ing HCF Porsche AG
Continental Automotive GmbH
Original Assignee
Dr Ing HCF Porsche AG
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG, Siemens AG filed Critical Dr Ing HCF Porsche AG
Priority to DE200510060793 priority Critical patent/DE102005060793A1/en
Publication of DE102005060793A1 publication Critical patent/DE102005060793A1/en
Ceased legal-status Critical Current

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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
    • F02M37/04—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
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3082—Control of electrical fuel pumps
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
    • 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
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • F02M37/0094—Saddle tanks; Tanks having partition walls

Abstract

The fuel supply system is connected to the injection system (13) of the engine with its linear characteristic line adapted to same. The amount of fuel delivered into the header pipe (12) corresponds to the maximum fuel consumption of the engine (14) at the lowest possible pressure of the injection system.

Description

Gegenstand der Erfindung ist eine Kraftstoffversorgungssystem mit einer in einem Kraftstoffbehälter angeordneten Fördereinheit, wobei die Fördereinheit einen Schwalltopf und eine darin angeordnete Kraftstoffpumpe aufweist, so dass die Kraftstoffpumpe Kraftstoff aus dem Schwalltopf in eine zu einer Brennkraftmaschine führenden Vorlaufleitung fördert.object The invention relates to a fuel supply system with an in a fuel tank arranged conveyor unit, the conveyor unit having a surge pot and a fuel pump disposed therein, allowing the fuel pump to flow out of the swirl pot into one leading to an internal combustion engine Feed line promotes.

Derartige Kraftstoffversorgungssystem sind seit langem bekannt und dienen dazu den Kraftstoff in ausreichender Menge und mit dem notwendigen Druck der Brennkraftmaschine zur Verfügung zustellen, wobei der Druck des zur Brennkraftmaschine geförderten Kraftstoff über alle Betriebspunkte konstant sein muss. Hierzu ist es bekannt, stromabwärts der Kraftstoffpumpe einen Druckregler anzuordnen, der die Einhaltung eines konstanten Drucks in der Vorlaufleitung gewährleistet. Über einen Abregelanschluss ist der Druckregler mit dem Kraftstoffbehälter oder den Schwalltopf verbunden, so dass die abgeregelte Kraftstoffmenge für eine erneute Förderung zur Brennkraftmaschine zur Verfügung steht. Aufgrund seines Grundaufbaus, der Anordnung im Kraftstoffbehälter und der notwendigen Kalibrierung erfordert der Druckregler einen nicht unerheblichen Aufwand in Herstellung und Montage.such Fuel supply systems have long been known and serve to the fuel in sufficient quantity and with the necessary pressure the internal combustion engine available set, the pressure of the promoted to the internal combustion engine Fuel over all operating points must be constant. For this purpose, it is known, downstream of the fuel pump to arrange a pressure regulator, which adheres to a constant Ensures pressure in the flow line. About one Abregelanschluss is the pressure regulator with the fuel tank or connected to the swirl pot, so that the regulated amount of fuel for one renewed support to the internal combustion engine available stands. Due to its basic construction, the arrangement in the fuel tank and the necessary calibration does not require the pressure regulator one insignificant effort in production and assembly.

Der Erfindung liegt die Aufgabe zugrunde ein Kraftstoffversorgungssystem der eingangs genannten Art mit einem vereinfachten Aufbau zu schaffen.Of the Invention is the object of a fuel supply system to create the type mentioned with a simplified structure.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass die Kennlinie des Kraftstoffversorgungssystems an das Einspritzsystem der Brennkraftmaschine angepasst ist.According to the invention Task solved by that the characteristic of the fuel supply system to the injection system the internal combustion engine is adjusted.

In Abhängigkeit der Anordnung der einzelnen Bestandteile des Kraftstoffversorgungssystems, wie Kraftstoffpumpe, Feinfilter, Schwalltopf und Saugstrahlpumpen ergibt sich eine Kennlinie für jedes Kraftstoffversorgungssystem, bei der die in die Vorlaufleitung abgegebene Fördermenge des Kraftstoffs eine Funktion des Drucks der abgegebenen Fördermenge ist. Durch geeignete Dimensionierung der einzelnen Bestandteile des Kraftstoffversorgungssystems lässt sich eine relativ flache Kennlinie erzeugen. Diese relativ flache Kennlinie ermöglicht es, das Kraftstoffversorgungssystem ohne einen Druckregler zu betreiben. Dabei wird der Umstand genutzt, dass das Einspritzsystem der Brennkraftmaschine keinen konstanten Druck des über die Vorlaufleitung zugeführten Kraftstoffs erfordert. Vielmehr kann der Druck des zugeführten Kraftstoffs in einem gewissen Bereich schwanken, so dass aufgrund der Bandbreite des zulässigen Druckbereichs der erforderliche Druck in der Vorlaufleitung aufgrund der Kennlinie des Kraftstoffversorgungssystems eingehalten wird. Der Wegfall des Druckreglers führt zu einer nicht unerheblichen Vereinfachung und Kostenreduktion des Kraftstoffversorgungssystems bei.In dependence the arrangement of the individual components of the fuel supply system, such as Fuel pump, fine filter, swirl pot and suction jet pumps results a characteristic for any fuel supply system that feeds into the supply line discharged flow of the fuel is a function of the pressure of the delivered flow is. By suitable dimensioning of the individual components The fuel supply system can be a relatively flat Generate characteristic. This relatively flat characteristic makes it possible to operate the fuel supply system without a pressure regulator. The circumstance is used that the injection system of the internal combustion engine no constant pressure over fed to the supply line Fuel requires. Rather, the pressure of the supplied fuel fluctuate in a certain range, so due to the bandwidth the permissible Pressure range the required pressure in the flow line due the characteristic of the fuel supply system is maintained. The elimination of the pressure regulator leads to a not inconsiderable simplification and cost reduction of the Fuel supply system at.

Die Anpassung der Kennlinie an das Einspritzsystem lässt sich in einfacher Weise derart vornehmen, dass die in die Vorlaufleitung abgegebene Fördermenge an Kraftstoff dem maximalen Kraftstoffverbrauch der Brennkraftmaschine bei geringstmöglichem Druck des Einspritzsystems der Brennkraftmaschine entspricht.The Adjustment of the characteristic curve to the injection system can be achieved in a simple manner make such that the output in the flow line delivery to fuel the maximum fuel consumption of the internal combustion engine at the lowest possible Pressure of the injection system of the internal combustion engine corresponds.

Eine weitere vorteilhafte Ausgestaltung besteht darin, die KennlinieA Another advantageous embodiment is the characteristic

An einem Ausführungsbeispiel wird die Erfindung näher erläutert. Es zeigenAt an embodiment the invention will be closer explained. Show it

1: ein erfindungsgemäßes Kraftstoffversorgungssystem, 1 a fuel supply system according to the invention,

2: ein Kennlinienfeld für Kraftstoffversorgungssysteme. 2 : a characteristic field for fuel supply systems.

1 zeigt schematisch einen Kraftstoffbehälter 1 eines Kraftfahrzeugs, bestehend aus zwei Teilkammern 2, 3, die über ein Einfüllrohr 4 befüllt werden. Der Kraftstoffbehälter 1 weist zwei jeweils mit einem Flansch verschlossene Öffnungen 5, 6 auf, wobei an einem Flansch ein Feinfilter 7 integriert ist. In der Teilkammer 3 ist eine Fördereinheit 8 eines Kraftstoffversorgungssystems 9 angeordnet. Die Fördereinheit 8 umfasst einen am Boden der Teilkammer 3 angeordneten Schwalltopf 10, in dem sich eine Kraftstoffpumpe 11 befindet. Die Kraftstoffpumpe 11 saugt aus dem Schwalltopf 10 Kraftstoff an und fördert den überwiegenden Teil in eine Vorlaufleitung 12. Die Vorlaufleitung 12 erstreckt sich von der Kraftstoffpumpe 11 über den Feinfilter 7 und den die Öffnung 7 verschließenden Flansch bis zum nicht näher dargestellten Einspritzsystem 13 einer Brennkraftmaschine 14 des Kraftfahrzeugs. Eine Teilmenge des von der Kraftstoffpumpe 11 geförderten Kraftstoffs wird nicht in die Vorlaufleitung 12 gefördert, sondern wird über weitere Ausgänge an der Kraftstoffpumpe 11 zu Saugstrahlpumpen 15, 16 gefördert. Die Saugstrahlpumpen 15, 16 dienen dazu den in den Teilkammern 2, 3 befindlichen Kraftstoff in den Schwalltopf 10 zu fördern. Die Kennlinie des Kraftstoffversorgungssystems 9 ist an das Einspritzsystem 13 der Brennkraftmaschine 14 angepasst, so dass kein Druckregler stromabwärts der Kraftstoffpumpe 11 erforderlich ist, um den Druck in der Vorlaufleitung 12 konstant zu halten. 1 schematically shows a fuel tank 1 a motor vehicle consisting of two sub-chambers 2 . 3 that have a filler pipe 4 be filled. The fuel tank 1 has two each with a flange closed openings 5 . 6 on, with a fine filter on a flange 7 is integrated. In the sub-chamber 3 is a conveyor unit 8th a fuel supply system 9 arranged. The conveyor unit 8th includes one at the bottom of the sub-chamber 3 arranged swirl pot 10 in which there is a fuel pump 11 located. The fuel pump 11 sucks from the swirl pot 10 Fuel and promotes the vast majority in a supply line 12 , The supply line 12 extends from the fuel pump 11 over the fine filter 7 and the opening 7 closing flange to the injection system, not shown 13 an internal combustion engine 14 of the motor vehicle. A subset of the fuel pump 11 subsidized fuel is not in the supply line 12 promoted, but will have more outputs on the fuel pump 11 to suction jet pumps 15 . 16 promoted. The suction jet pumps 15 . 16 serve those in the sub-chambers 2 . 3 located fuel in the swirl pot 10 to promote. The characteristic of the fuel supply system 9 is to the injection system 13 the internal combustion engine 14 adjusted, so no pressure regulator downstream of the fuel pump 11 necessary to the pressure in the flow line 12 to keep constant.

Das Diagramm in 2 zeigt ein Kennlinienfeld für Kraftstoffversorgungssysteme mit einer maximalen Fördermenge von 160 l/h. Die waagerecht verlaufenden Kennlinie 17 ist eine Kennlinie eines Kraftstoffversorgungssystems nach dem Stand der Technik mit einem Druckregler. Der Druckregler dient dazu in der Vorlaufleitung einen konstanten Druck von 6 bar einzustellen.The diagram in 2 shows a characteristic field for fuel supply systems with a maximum flow of 160 l / h. The horizontally running characteristic 17 is a characteristic of a fuel supply system according to the prior art with a pressure regulator. The pressure regulator is used to set a constant pressure of 6 bar in the supply line.

Die zweite Kennlinie 18 ist die Kennlinie des Kraftstoffversorgungssystems 9 aus 1. Die Kennlinie 18 wurde an den Druckbereich des Einspritzsystems 13 angepasst, welches Drücke in der Vorlaufleitung 12 von 4 bar bis 8 bar erlaubt. Die Anpassung der Kennlinie 18 erfolgte dabei nach dem geringstmöglichen Druck des Einspritzsystems von 4 bar bei maximalem Kraftstoffverbrauch von 160 l/h der Brennkraftmaschine 14.The second characteristic 18 is the characteristic of the fuel supply system 9 out 1 , The characteristic 18 was to the pressure area of the injection system 13 adjusted, which pressures in the flow line 12 from 4 bar to 8 bar allowed. The adaptation of the characteristic 18 took place after the lowest possible pressure of the injection system of 4 bar with maximum fuel consumption of 160 l / h of the internal combustion engine 14 ,

Claims (3)

Kraftstoffversorgungssystem mit einer in einem Kraftstoffbehälter angeordneten Fördereinheit, wobei die Fördereinheit einen Schwalltopf und eine darin angeordnete Kraftstoffpumpe aufweist, um Kraftstoff aus dem Schwalltopf in eine Vorlaufleitung zu fördern, welche das Kraftstoffversorgungssystem mit dem Einspritzsystem einer Brennkraftmaschine verbindet, und mit mindestens einer Saugstrahlpumpe, um Kraftstoff aus dem Kraftstoffbehälter in den Schwalltopf zu fördern, dadurch gekennzeichnet, dass die Kennlinie (18) des Kraftstoffversorgungssystems (9) an das Einspritzsystem (13) der Brennkraftmaschine (14) angepasst ist.A fuel supply system having a delivery unit disposed in a fuel tank, the delivery unit having a surge pot and a fuel pump disposed therein to deliver fuel from the surge pot into a supply line connecting the fuel supply system to the injection system of an internal combustion engine and with at least one suction jet pump to fuel from the fuel tank into the swirl pot, characterized in that the characteristic ( 18 ) of the fuel supply system ( 9 ) to the injection system ( 13 ) of the internal combustion engine ( 14 ) is adjusted. Kraftstoffversorgungssystem nach Anspruch 1, dadurch gekennzeichnet, dass die in die Vorlaufleitung (12) abgegebene Fördermenge an Kraftstoff dem maximalen Kraftstoffverbrauch der Brennkraftmaschine (14) bei geringstmöglichen Druck des Einspritzsystems (13) der Brennkraftmaschine (14) entspricht.Fuel supply system according to claim 1, characterized in that in the supply line ( 12 ) delivered amount of fuel to the maximum fuel consumption of the internal combustion engine ( 14 ) at the lowest possible pressure of the injection system ( 13 ) of the internal combustion engine ( 14 ) corresponds. Kraftstoffversorgungssystem nach Anspruch 2, dadurch gekennzeichnet, dass die Kennlinie (18) linear ist.Fuel supply system according to claim 2, characterized in that the characteristic curve ( 18 ) is linear.
DE200510060793 2005-12-16 2005-12-16 Fuel supply system is connected to engine injection system with its flat linear characteristic line adapted to same with amount of fuel delivered to header pipe corresponding to maximum fuel consumption of engine at lowest pressure Ceased DE102005060793A1 (en)

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DE200510060793 DE102005060793A1 (en) 2005-12-16 2005-12-16 Fuel supply system is connected to engine injection system with its flat linear characteristic line adapted to same with amount of fuel delivered to header pipe corresponding to maximum fuel consumption of engine at lowest pressure

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DE200510060793 DE102005060793A1 (en) 2005-12-16 2005-12-16 Fuel supply system is connected to engine injection system with its flat linear characteristic line adapted to same with amount of fuel delivered to header pipe corresponding to maximum fuel consumption of engine at lowest pressure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057636A1 (en) 2008-11-17 2010-05-20 J. Eberspächer GmbH & Co. KG Fluid supply system, in particular for conveying liquid hydrocarbon to a fuel-powered vehicle heater or a reformer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136004A1 (en) * 2000-07-25 2002-02-14 Unisia Jecs Corp fuel supply
DE19625902B4 (en) * 1995-06-28 2005-08-18 Denso Corp., Kariya Fuel supply system for an internal combustion engine and method for its adjustment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625902B4 (en) * 1995-06-28 2005-08-18 Denso Corp., Kariya Fuel supply system for an internal combustion engine and method for its adjustment
DE10136004A1 (en) * 2000-07-25 2002-02-14 Unisia Jecs Corp fuel supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008057636A1 (en) 2008-11-17 2010-05-20 J. Eberspächer GmbH & Co. KG Fluid supply system, in particular for conveying liquid hydrocarbon to a fuel-powered vehicle heater or a reformer
US8316885B2 (en) 2008-11-17 2012-11-27 J. Eberspächer GmbH & Co. KG Fluid supply system, especially for delivering liquid hydrocarbon to a fuel-operated vehicle heater or to a reformer

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8127 New person/name/address of the applicant

Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

Owner name: DR.ING.H.C. F. PORSCHE AG, 71287 WEISSACH, DE

R002 Refusal decision in examination/registration proceedings
R003 Refusal decision now final