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DE4401083A1 - Fuel injection unit for IC engine - Google Patents

Fuel injection unit for IC engine

Info

Publication number
DE4401083A1
DE4401083A1 DE19944401083 DE4401083A DE4401083A1 DE 4401083 A1 DE4401083 A1 DE 4401083A1 DE 19944401083 DE19944401083 DE 19944401083 DE 4401083 A DE4401083 A DE 4401083A DE 4401083 A1 DE4401083 A1 DE 4401083A1
Authority
DE
Germany
Prior art keywords
fuel
pump
pressure
fuel injection
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
DE19944401083
Other languages
German (de)
Inventor
Christoph Dipl Ing Burckhardt
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz 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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Priority to DE19944401083 priority Critical patent/DE4401083A1/en
Publication of DE4401083A1 publication Critical patent/DE4401083A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/16—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps characterised by having multi-stage compression of fuel
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/15—By-passing over the pump

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The unit has a fuel pump in a low pressure supply leading to the high pressure pump, and with a high pressure source as the common rail for all magnetic valve controlled injection nozzles. Fuel volumes supplied in all load conditions of the engine are controllable solely by operating parameters on the low pressure side. The controlled fuel volumes are supplied to the unregulated high pressure pump (4) according to camshaft speed or a whole number of multiples thereof.

Description

Die Erfindung betrifft eine Kraftstoffeinspritzanlage für Brennkraftmaschinen mit einer den Kraftstoff fördernden Kraftstoffpumpe in einer zur Hochdruckpumpe führenden Niederdruckleitung nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a fuel injection system for Internal combustion engines with a fuel-promoting Fuel pump in one leading to the high pressure pump Low-pressure line according to the preamble of claim 1 specified features.

Aus der DE 36 21 307 C2 ist eine derartige Kraftstoffeinspritzanlage bekannt, bei der eine Kraftstoffpumpe Kraftstoff aus einem Behälter ansaugt und einer Hochdruckpumpe zuführt, deren unter hohem Druck abgegebene Fördermenge durch eine Antriebsvorrichtung, die ein Schrittmotor oder Linearschaltmagnet sein kann, regelbar ist.Such is known from DE 36 21 307 C2 Fuel injection system known in which a fuel pump Sucks fuel from a tank and a high pressure pump feeds, the delivered under high pressure through a drive device that is a stepper motor or Linear switching magnet can be adjustable.

Der Erfindung liegt die Aufgabe zugrunde, den baulichen Aufwand zur Einspeisung des Kraftstoffes in die für alle magnetventilgesteuerten Einspritzdüsen vorgesehene gemeinsame Hochdruck-Versorgungsleitung herabzusetzen und zugleich das für die Mengenförderung zur Verfügung gestellte Energieniveau dem für die Brennkraftmaschine bedarfsgerechten Niveau optimal anzupassen.The invention has for its object the construction effort to feed the fuel into the for everyone common valve-controlled injection nozzles Low pressure supply line and at the same time that for the amount of energy provided to the optimal level for the internal combustion engine adapt.

Die Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale gelöst.The object is achieved by the in the characteristic of Features specified claim 1 solved.

In den Unteransprüchen sind noch förderliche Weiterbildungen der Erfindung angegeben. In the subclaims there are still further developments Invention specified.  

Durch die erfindungsgemäßen Maßnahmen wird somit nicht auf der hochbeanspruchten Hochdruckseite die Kraftstoffmenge geregelt, vielmehr erfolgt die bedarfsgerecht angebotene Fördermenge im Niederdruckkreislauf, in dem sich durch die Verlagerung der Steuerungselemente von der Hochdruck- zur Niederdruckseite der Vorteil weitaus geringerer Energieverluste ergibt.The measures according to the invention are therefore not based on the highly stressed high pressure side regulates the amount of fuel, rather, the amount of funding offered is in the Low pressure cycle in which the relocation of the Control elements from the high pressure to the low pressure side of the The advantage of far lower energy losses results.

Von der Hochdruckpumpe wird also lediglich der wirkliche Mengenbedarf aufgenommen und in den Hochdruckspeicher geleitet.So the high pressure pump only becomes the real one Quantity requirements recorded and fed into the high pressure accumulator.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und im folgenden näher erläutert. Es zeigen:Embodiments of the invention are in the drawing shown and explained in more detail below. Show it:

Fig. 1 eine erfindungsgemäße Kraftstoffanlage mit niederdruckseitig regelbarer Kraftstoffpumpe und nachfolgender unregelbarer Hochdruckpumpe, Fig. 1 a fuel system according to the invention with the low pressure side controllable fuel pump and subsequent unregelbarer high-pressure pump,

Fig. 2 ein zwischen Kraftstoffpumpe und Hochdruckpumpe angeordnetes Dämpfungsglied, Fig. 2 a valve disposed between the fuel pump and high pressure pump attenuator

Fig. 3 eine unregelbare Kraftstoffpumpe mit regelbarer Drossel, Fig. 3 is a unregelbare fuel pump with an adjustable throttle,

Fig. 4 eine gegenüber der Ausführung nach Fig. 1 anders gestaltete Hochdruckpumpe im Querschnitt und Fig. 4 shows a comparison with the embodiment according to Fig. 1 differently shaped high-pressure pump in cross-section and

Fig. 5 die Hochdruckpumpe nach der Linie V-V in Fig. 4. Fig. 5, the high-pressure pump according to the line VV in Fig. 4.

Eine Kraftstoffeinspritzanlage 1 für eine Dieselbrennkraftmaschine 2 besteht im wesentlichen aus einer den Kraftstoff aus einem Behälter 3 ansaugenden elektrisch angetriebenen Kraftstoffpumpe 4 in einer zu einer Hochdruckpumpe 5 führenden Niederdruckleitung 6, aus einem Hochdruckspeicher 7, der als gemeinsame Versorgungsleitung für alle magnetventilgesteuerten Einspritzdüsen 8 ausgebildet ist, sowie aus einem von Betriebsparametern der Brennkraftmaschine abhängigen elektronischen Steuergerät 9, das u. a. zur Ansteuerung der niederdruckseitigen Kraftstoffpumpe 4 dient. A fuel injection system 1 for a diesel internal combustion engine 2 essentially consists of an electrically driven fuel pump 4 which sucks the fuel from a container 3 in a low-pressure line 6 leading to a high-pressure pump 5 , and a high-pressure accumulator 7 which is designed as a common supply line for all solenoid-controlled injection nozzles 8 . and from an electronic control unit 9 which is dependent on the operating parameters of the internal combustion engine and which is used, among other things, to control the low-pressure fuel pump 4 .

Die von dem Steuergerät 9 ansteuerbare Kraftstoffpumpe 4 fördert Kraftstoff mengensteuernd zur Hochdruckpumpe 5, die als Kolbenpumpe ausgebildet ist und mit Nockenwellendrehzahl bzw. einem ganzzahlig Vielfachen angetrieben wird. Die Nockenwelle 10 weist zwei diametral gegenüberliegende Nocken 11, 12 auf, die mit in Buchsen 13, 14 freibeweglich geführten Förderkolben 15, 16 zusammenwirken, von denen jeder einen Pumpenarbeitsraum 17, 18 zwischen jeweils zwei Rückschlagventilen 19, 20 und 21, 22 begrenzt.The fuel pump 4 , which can be controlled by the control unit 9, delivers fuel in a quantity-controlling manner to the high-pressure pump 5 , which is designed as a piston pump and is driven at camshaft speed or an integral multiple. The camshaft 10 has two diametrically opposed cams 11 , 12 which cooperate with delivery pistons 15 , 16 which are guided freely in bushings 13 , 14 , each of which delimits a pump working chamber 17 , 18 between two check valves 19 , 20 and 21 , 22 .

Die von der Niederdruckseite durch die regelbare Kraftstoffpumpe 4 in dem jeweiligen Lastbereich der Brennkraftmaschine bedarfso­ rientiert angebotene Kraftstoffmenge wird über die Rückschlag­ ventile 19, 22 in die Pumpenarbeitsräume 17, 18 gedrückt. Sobald die Nocken 11, 12 wirksam sind, verdrängen die Förderkolben 15, 16 infolge deren Förderhübe den Kraftstoff unter hohem Druck aus dem Pumpenarbeitsraum 17, 18 über die Rückschlagventile 20, 21 in den Hochdruckspeicher 7 bzw. in die Versorgungsleitung. Dieser Antrieb für die Kolbenpumpe hat den Vorteil, daß bei nicht ganz geglättetem Druckverlauf der Einspritzdüsen gleiche Ausgangsbe­ dingungen zur Einspritzmengensteuerung angeboten und damit die Einspritzmengenstreuung deutlich verringert wird.From the low pressure side by the controllable fuel pump 4 in the respective load range of the internal combustion engine, the quantity of fuel offered is pushed via the check valves 19 , 22 into the pump work spaces 17 , 18 . As soon as the cams 11 , 12 are effective, the delivery pistons 15 , 16 displace the fuel under high pressure from the pump working space 17 , 18 via the check valves 20 , 21 into the high-pressure accumulator 7 or into the supply line as a result of their delivery strokes. This drive for the piston pump has the advantage that when the pressure curve of the injection nozzles is not completely smoothed, the same output conditions are offered for controlling the injection quantity and thus the injection quantity spread is significantly reduced.

Zur Mengensteuerung im Niederdruckteil ist vorgesehen, den Druck Psp im Hochdruckspeicher 7 nebst der Motordrehzahl nMot und der Stellung des Fahrpedals L zu erfassen und dem Steuergerät 9 zu­ zuführen, welches daraus kennfeldabhängig die in die Hochdruck­ pumpe einzuspeisende Kraftstoffmenge errechnet. Das entspre­ chende Ausgangssignal dient zur Ansteuerung der elektrischen Kraftstoffpumpe 4 gemäß Fig. 1 oder zur Ansteuerung einer varia­ blen Drossel 23 stromab der in diesem Falle konstantdruckför­ dernden Kraftstoffpumpe 24 gemäß Fig. 3. Bei dieser Ausführung fließt überschüssig geförderter Kraftstoff in einem die Kraft­ stoffpumpe 24 umgehenden Bypass 25 mit drucksteuerndem 2-Wege­ ventil 26. To control the volume in the low-pressure part, it is provided to record the pressure P sp in the high-pressure accumulator 7 in addition to the engine speed n Mot and the position of the accelerator pedal L and to supply it to the control unit 9 , which calculates the fuel quantity to be fed into the high-pressure pump from this. The corre sponding output signal is used to control the electric fuel pump 4 according to FIG. 1 or to control a variable throttle 23 downstream of the constant pressure-promoting fuel pump 24 according to FIG. 3 in this case . In this embodiment, excess fuel flows into the fuel pump 24 immediate bypass 25 with pressure-controlling 2-way valve 26 .

Gegebenenfalls kann gemäß Fig. 1 zwischen der Kraftstoff- und Hochdruckpumpe 4, 5 ein Niederdruckspeicher 27 oder gemäß Fig. 2 ein Dämpfungsglied 28 angeordnet sein.Optionally Fig. 1, a low-pressure accumulator, an attenuator, in accordance between the fuel and high-pressure pump 4, 5 or 27 of FIG. 2 may be 28 disposed.

Ferner können gemäß Fig. 4 und 5 die hier gezeigten vier Förder­ kolben 15, 16, 15′, 16′ in einem Rotor 29 längsverschiebbar ge­ führt sein und von einem mit einer der Förderkolbenzahl entspre­ chenden Zahl von Nocken 11, 12, 11′, 12′ in einem ortsfesten In­ nenring 30 angetrieben werden.Further, according to Fig. 4 and 5, shown here, four delivery pistons 15, 16, 15 ', 16' resulting in a rotor 29 in a longitudinally displaceable ge be and of one with one of the delivery plunger number entspre sponding number of cams 11, 12, 11 ', 12 'in a stationary In ring 30 are driven.

Bei dieser Ausführung ist der Pumpenarbeitsraum 31 durch die sternförmig angeordneten Förderkolben und durch die Rückschlag­ ventile 19, 20 begrenzt.In this embodiment, the pump working space 31 is limited by the star-shaped delivery pistons and by the check valves 19 , 20 .

Mit 32 ist noch eine die Hochdruckpumpe 5 und den Hochdruckspei­ cher 7 verbindende Hochdruckleitung bezeichnet. 32 with a high-pressure pump 5 and the high-pressure accumulator 7 connecting high-pressure line is designated.

Claims (5)

1. Für eine Brennkraftmaschine vorgesehene Kraftstoffeinspritz­ anlage mit einer den Kraftstoff fördernden Kraftstoffpumpe in einer zur Hochdruckpumpe führenden Niederdruckleitung und mit einem Hochdruckspeicher als gemeinsame Versorgungsleitung (Common-Rail) für alle magnetventilgesteuerten Einspritzdüsen, dadurch gekennzeichnet, daß die in allen Lastbereichen dem Mengenbedarf der Brennkraft­ maschine angepaßte Kraftstoffmenge lediglich niederdruckseitig betriebsparameterabhängig steuerbar ist.1. For an internal combustion engine provided fuel injection system with a fuel pump fuel pump in a low-pressure line leading to the high-pressure pump and with a high-pressure accumulator as a common supply line (common rail) for all solenoid-controlled injection nozzles, characterized in that the quantity requirement of the internal combustion engine in all load ranges adapted amount of fuel is only controllable on the low pressure side depending on the operating parameters. 2. Kraftstoffeinspritzanlage nach Anspruch 1, dadurch gekennzeichnet, daß die gesteuerte Kraftstoffmenge der mit Nockenwellendrehzahl oder einem ganzzahlig Vielfachen davon angetriebenen unregelba­ ren Hochdruckpumpe (4, 24) zuführbar ist.2. Fuel injection system according to claim 1, characterized in that the controlled amount of fuel with the camshaft speed or an integral multiple thereof driven irregular high pressure pump ( 4 , 24 ) can be supplied. 3. Kraftstoffeinspritzanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die in Abhängigkeit von Betriebsparametern, z. B. Drehzahl (nMot), Last (L), Speicherdruck (Psp), lieferbare Kraftstoffmen­ ge durch die als elektrisch antreibbare Kolbenpumpe ausgebildete Kraftstoffpumpe (4; 24) selbst erfolgt.3. Fuel injection system according to claim 1 or 2, characterized in that the depending on operating parameters, for. B. speed (n Mot ), load (L), accumulator pressure (P sp ), deliverable quantity of fuel by the fuel pump designed as an electrically driven piston pump ( 4 ; 24 ) itself. 4. Kraftstoffeinspritzanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die in Abhängigkeit von Betriebsparametern, z. B. Drehzahl (nMot), Last (L), Speicherdruck (Psp), lieferbare Kraftstoffmen­ ge durch eine stromab der mit Konstantförderung ausgelegten Kraftstoffpumpe (4; 24) angeordnete pulsweitengesteuerte elektri­ sche Drossel erfolgt.4. Fuel injection system according to claim 1 or 2, characterized in that the depending on operating parameters, for. B. speed (n Mot ), load (L), accumulator pressure (P sp ), deliverable quantity of fuel by a downstream of the fuel pump designed with constant delivery ( 4 ; 24 ) arranged pulse width controlled electrical choke. 5. Kraftstoffeinspritzanlage nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß die Hochdruckpumpe (5) als fördernockenbetätigte Kolbenpumpe mit in ihren Führungsbuchsen freibeweglichen Förderkolben ausge­ bildet ist.5. Fuel injection system according to one of the preceding claims, characterized in that the high-pressure pump ( 5 ) is formed as a delivery cam-actuated piston pump with freely movable delivery pistons in its guide bushes.
DE19944401083 1994-01-15 1994-01-15 Fuel injection unit for IC engine Ceased DE4401083A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944401083 DE4401083A1 (en) 1994-01-15 1994-01-15 Fuel injection unit for IC engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944401083 DE4401083A1 (en) 1994-01-15 1994-01-15 Fuel injection unit for IC engine

Publications (1)

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DE4401083A1 true DE4401083A1 (en) 1995-07-20

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0778413A1 (en) * 1995-11-29 1997-06-11 LUCAS INDUSTRIES public limited company Fuel supply system
DE19612412A1 (en) * 1996-03-28 1997-10-02 Rexroth Mannesmann Gmbh Control of fuel pressure in injector system for diesel engine
DE19618932A1 (en) * 1996-05-10 1997-11-20 Siemens Ag Device and method for regulating the fuel in a high pressure accumulator
DE19652831A1 (en) * 1996-12-18 1998-06-25 Rexroth Mannesmann Gmbh Pressurised fluid feed system for high pressure common rail systems
DE19739653A1 (en) * 1997-09-10 1999-03-11 Bosch Gmbh Robert Process for producing high-pressure fuel and system for producing high-pressure fuel
EP0911512A3 (en) * 1997-10-27 1999-08-25 Mitsubishi Denki Kabushiki Kaisha Cylinder injection high-pressure fuel pump
FR2777950A1 (en) * 1998-04-24 1999-10-29 Bosch Gmbh Robert FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINE
DE19822164A1 (en) * 1998-05-16 1999-11-18 Audi Ag Safety system for high pressure fuel supply
WO2001053686A3 (en) * 2000-01-19 2002-02-07 Bosch Gmbh Robert Method for operating a presupply pump of a fuel metering system and fuel metering system of a direct injection internal combustion engine
WO2001044637A3 (en) * 1999-12-18 2002-05-10 Bosch Gmbh Robert Method for controlling a fuel pump
EP1101940A3 (en) * 1999-11-18 2003-01-15 Siemens Automotive Corporation High pressure fuel pump delivery control by piston deactivation
DE102004008478A1 (en) * 2004-02-20 2005-09-15 Siemens Ag Pump device for fuel injection system, has fuel tank connected to high pressure pump via feed pump with controllable fuel flow
EP2357354A3 (en) * 2010-02-17 2015-12-23 Robert Bosch GmbH Hydraulic system and fuel injection system for a combustion engine

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DE200275C (en) *
EP0299337A2 (en) * 1987-07-08 1989-01-18 IVECO FIAT S.p.A. Fuel injection system for an internal combustion engine
DE3937362A1 (en) * 1988-11-28 1990-05-31 Walbro Corp FUEL FEEDING SYSTEM

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US5850817A (en) * 1995-11-29 1998-12-22 Lucas Industries Public Limited Co. Fuel pump
USRE37632E1 (en) 1995-11-29 2002-04-09 Delphi Technologies Inc. Fuel pump
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DE19612412B4 (en) * 1996-03-28 2006-07-06 Siemens Ag Control for a pressurized fluid supply system, in particular for the high pressure in a fuel injection system
US6293253B1 (en) 1996-03-28 2001-09-25 Siemens Aktiengesellschaft Control for a fluid pressure supply system, particularly for high pressure in a fuel injection system
DE19618932C2 (en) * 1996-05-10 2001-02-01 Siemens Ag Device and method for regulating the fuel pressure in a high pressure accumulator
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DE19652831A1 (en) * 1996-12-18 1998-06-25 Rexroth Mannesmann Gmbh Pressurised fluid feed system for high pressure common rail systems
DE19652831B4 (en) * 1996-12-18 2011-02-24 Continental Automotive Gmbh Pressure fluid feed system for the supply of high pressure manifolds
US6230688B1 (en) * 1997-09-10 2001-05-15 Robert Bosch Gmbh Process for generating high-pressure fuel and system for generating high fuel pressure
WO1999013215A1 (en) * 1997-09-10 1999-03-18 Robert Bosch Gmbh Method for generating high pressurized fuel and a system for generating thereof
DE19739653A1 (en) * 1997-09-10 1999-03-11 Bosch Gmbh Robert Process for producing high-pressure fuel and system for producing high-pressure fuel
US6053712A (en) * 1997-10-27 2000-04-25 Mitsubishi Denki Kabushiki Kaisha Cylinder injection high-pressure fuel pump
EP0911512A3 (en) * 1997-10-27 1999-08-25 Mitsubishi Denki Kabushiki Kaisha Cylinder injection high-pressure fuel pump
FR2777950A1 (en) * 1998-04-24 1999-10-29 Bosch Gmbh Robert FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINE
US6889656B1 (en) 1998-04-24 2005-05-10 Robert Bosch Gmbh Fuel supply system of an internal combustion engine
DE19822164A1 (en) * 1998-05-16 1999-11-18 Audi Ag Safety system for high pressure fuel supply
EP1101940A3 (en) * 1999-11-18 2003-01-15 Siemens Automotive Corporation High pressure fuel pump delivery control by piston deactivation
US6866025B1 (en) 1999-11-18 2005-03-15 Siemens Vdo Automotive Corp. High pressure fuel pump delivery control by piston deactivation
WO2001044637A3 (en) * 1999-12-18 2002-05-10 Bosch Gmbh Robert Method for controlling a fuel pump
WO2001053686A3 (en) * 2000-01-19 2002-02-07 Bosch Gmbh Robert Method for operating a presupply pump of a fuel metering system and fuel metering system of a direct injection internal combustion engine
DE102004008478B4 (en) * 2004-02-20 2007-05-10 Siemens Ag Flow control of a high pressure pump
DE102004008478A1 (en) * 2004-02-20 2005-09-15 Siemens Ag Pump device for fuel injection system, has fuel tank connected to high pressure pump via feed pump with controllable fuel flow
EP2357354A3 (en) * 2010-02-17 2015-12-23 Robert Bosch GmbH Hydraulic system and fuel injection system for a combustion engine

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