DE4301069A1 - Fuel injection on a diesel engine - Google Patents

Fuel injection on a diesel engine

Info

Publication number
DE4301069A1
DE4301069A1 DE19934301069 DE4301069A DE4301069A1 DE 4301069 A1 DE4301069 A1 DE 4301069A1 DE 19934301069 DE19934301069 DE 19934301069 DE 4301069 A DE4301069 A DE 4301069A DE 4301069 A1 DE4301069 A1 DE 4301069A1
Authority
DE
Germany
Prior art keywords
pump
cam
fuel injection
valve
pressure
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
DE19934301069
Other languages
German (de)
Inventor
Frank Dipl Ing Thoma
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.)
THOMA, FRANK, DIPL.-ING., 70192 STUTTGART, DE
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 DE19934301069 priority Critical patent/DE4301069A1/en
Publication of DE4301069A1 publication Critical patent/DE4301069A1/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

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

A fuel injection system for a diesel engine has the camshaft used on the intake and exhaust valves as a means for operating the individual plungers. Either the same cams are used or an extra set of cams is present. In the latter case, one cam will operate plungers for at least two injectors by having a corresponding number of lobes.

Description

Die Erfindung betrifft eine Kraftstoffeinspritzanlage für eine mehrzylindrige Diesel-Brennkraftmaschine mit mindestens einer Nockenwelle für die Betätigung von Gaswechselventilen, bei der wenigstens eine mechanisch angetriebene Hochdruckpumpe Kraft­ stoff in eine für alle magnetventilgesteuerten Einspritzdüsen vorgesehene und als Druckspeicher wirkende gemeinsame Versor­ gungsleitung fördert.The invention relates to a fuel injection system for a Multi-cylinder diesel engine with at least one Camshaft for the actuation of gas exchange valves at at least one mechanically driven high pressure pump force fabric in one for all solenoid-controlled injection nozzles intended and acting as a pressure accumulator common management supports.

Aus der DE 32 27 742 A1 ist eine Kraftstoffeinspritzanlage mit einer Hochdruckpumpe und einer als Speicher dienenden Hoch­ druckversorgungsleitung mit Druckraum bekannt. Die Hochdruck­ pumpe wird von der Brennkraftmaschine über ein an der Stirn­ seite des Motorblocks gelegenes Getriebe angetrieben. Ausfüh­ rungen dieser Art erfordern ein großes Bauvolumen.DE 32 27 742 A1 discloses a fuel injection system a high pressure pump and a high serving as storage pressure supply line with pressure chamber known. The high pressure pump is from the internal combustion engine via a forehead gearbox located on the side of the engine block. Execution This type of construction requires a large construction volume.

Der Erfindung liegt die Aufgabe zugrunde, für die Hochdruck­ pumpe einen erheblich geringeren Platzbedarf und einfacheren Antrieb zu realisieren.The invention is based, for the high pressure task pump a significantly smaller footprint and simpler To realize drive.

Zur Lösung dieser Aufgabe dienen die im Kennzeichen des Pa­ tentanspruchs 1 angegebenen Merkmale.To solve this task, the Pa Features 1.

Dadurch, daß die Ventilnockenwelle für die Gaswechselventile auch als besonderer Antrieb für die Einzel-Kolben-Pumpen­ elemente herangezogen ist, ergibt sich eine bauaufwandarme und platzsparende Bauweise, so daß mehr Raum und weitere gestalte­ rische Freiheit für Aggregate oder andere Bauteile an der Brennkraftmaschine geschaffen ist.The fact that the valve camshaft for the gas exchange valves also as a special drive for the single piston pumps  elements is used, there is a low construction effort and space-saving design, so that more space and more design freedom for units or other components on the Internal combustion engine is created.

Eine vorteilhafte Ausgestaltung der Erfindung ist im Anspruch 2 angegeben, die eine Ausführung nur eines Einzel-Kolben-Pumpen­ elementes für zwei oder mehr Zylinder ermöglicht, indem der Nocken eine Anzahl von Erhebungen aufweist, die nicht der Zy­ linderzahl entsprechen müssen. Somit ist die Anzahl der Erhe­ bungen je nach Bedarf oder Erfordernis im Hinblick auf Nocken­ belastung, Hublänge des Pumpenelementes und Baugröße des Pumpenelementes frei wählbar.An advantageous embodiment of the invention is in claim 2 specified which is a version of only a single piston pump element for two or more cylinders by the Cam has a number of elevations that the Zy number of children must correspond. Hence the number of marriages Exercises depending on the need or need with regard to cams load, stroke length of the pump element and size of the Pump element freely selectable.

Aus der EP 0501459 A2 ist zwar ein Speichereinspritzsystem mit einem mehrere Erhebungen aufweisenden Pumpennocken bekannt, jedoch benötigt die Hochdruckversorgungspumpe einen eigenen Antrieb an der Brennkraftmaschine mit einer lediglich die Pumpennocken aufweisenden Nockenwelle. Die Anzahl der Erhe­ bungen muß hierbei der Zylinderzahl entsprechen.EP 0501459 A2 does include a storage injection system known a pump cam having multiple elevations, however, the high pressure supply pump requires its own Drive on the internal combustion engine with only one Camshaft having pump cams. The number of heights Exercises must correspond to the number of cylinders.

Die Erfindung ist in der Zeichnung dargestellt und anhand von Ausführungsbeispielen nachfolgend näher erläutert. Es zeigen:The invention is illustrated in the drawing and based on Exemplary embodiments explained in more detail below. Show it:

Fig. 1a an einer vereinfacht dargestellten Kraftstoff­ einspritzanlage als Speichereinspritzsystem Ven­ tilnocken als Antrieb für Einzel-Kolben-Pumpen­ elemente, Fig illustrated simplified. 1a on a fuel injection system as an accumulator injection system Ven tilnocken as a drive for single-piston pump elements,

Fig. 1b separate Pumpennocken auf der Ventilnockenwelle sowie darüber angedeutet diesen Pumpennocken mit zwei Erhebungen und in strichpunktierter Dar­ stellung einen Pumpennocken mit vier Erhebungen, FIG. 1b separate pump cam on the valve camshaft, as well as indicated above this pump cam with two projections and in dash-dotted position Dar a pump cam having four projections,

Fig. 2 die Kraftstoffeinspritzanlage in Gesamtdarstel­ lung an einer Brennkraftmaschine. Fig. 2 shows the fuel injection system in overall presen- tation on an internal combustion engine.

Eine Kraftstoffeinspritzanlage 1 für eine mehrzylindrige Die­ sel-Brennkraftmaschine 2 besteht aus einer als Speicher die­ nenden Hochdruck-Versorgungsleitung 3 zwischen Hochdruckpumpen und magnetventilgesteuerten Einspritzdüsen. Die Hochdruckpumpen sind als Einzel-Kolben-Pumpenelemente 4, 5, 6, 7 ausgebildet, die durch eine die Gaswechselventile 8, 9 als Ein- und Auslaßventile betätigende Ventilnockenwelle 10 der Brennkraftmaschine 2 an­ getrieben werden.A fuel injection system 1 for a multi-cylinder sel internal combustion engine 2 consists of a high-pressure supply line 3 between the high-pressure pumps and the solenoid-controlled injection nozzles. The high pressure pumps are designed as single-piston pump elements 4 , 5 , 6 , 7 , which are driven by a gas exchange valves 8 , 9 acting as intake and exhaust valves valve camshaft 10 of the internal combustion engine 2 .

In Fig. 1a ist eine Ausführung gezeigt, bei der jeweils einer der paarweise angeordneten Ventilnocken 11, 12; 13; 14; 15; 16; 17, 18 der Ventilnockenwelle 10 zugleich Pumpennocken für die Ein­ zel-Kolben-Pumpenelemente 4, 5, 6, 7 ist, deren Anzahl der Zylin­ derzahl der vierzylindrigen Brennkraftmaschine entspricht. Die vier Einspritzdüsen sind mit 19, 20, 21, 22 bezeichnet.In Fig. 1a, an embodiment is shown in which one of the paired valve cams 11 , 12 ; 13 ; 14 ; 15 ; 16 ; 17 , 18 of the valve camshaft 10 is at the same time pump cams for the individual piston pump elements 4 , 5 , 6 , 7 , the number of which corresponds to the number of cylinders of the four-cylinder internal combustion engine. The four injectors are designated 19 , 20 , 21 , 22 .

In Fig. 1b ist eine Ausführung gezeigt, bei der auf der Ven­ tilnockenwelle 10 neben den Ventilnockenpaaren separat von diesen liegende Pumpennocken 23 und 24 vorgesehen sind. Diese zwei Pumpennocken 23, 24 sind mit jeweils zwei Nockenerhebungen 23′, 23′′ und 24′, 24′′ ausgestattet - über der Nockenwelle 10 dar­ gestellt - und betätigen jeweils ein Einzel-Kolben-Pumpenele­ ment 4 und 5, von denen jedes zwei Zylindern der Brennkraftma­ schine 2 zugeordnet sein kann.In Fig. 1b, an embodiment is shown in which on the Ven tilnockenwelle 10 in addition to the valve cam pairs of these pump cams 23 and 24 are provided separately. These two pump cams 23 , 24 are each equipped with two cam lobes 23 ', 23 ''and 24 ', 24 '' - placed above the camshaft 10 - and each actuate a single-piston element 4 and 5 , each of which two cylinders of the internal combustion engine 2 can be assigned.

Eine weitere Ausführung ist in strichpunktierten Linien ange­ geben, nämlich ein separater einziger Pumpennocken 25 auf der Ventilnockenwelle 10. Dieser Pumpennocken weist vier Nockener­ hebungen 25′, 25′′, 25′′′, 25′′′′ auf und bewirkt eine Vierfach­ förderung pro Nockenwellenumdrehung in die gemeinsame Versor­ gungsleitung 3, von der ausgehend Druckleitungen 26, 27, 28, 29 zu den Einspritzdüsen 19 bis 22 führen. Die Verteilung der Förderleistung auf mehrerer Einzel-Kolben-Pumpenelemente und Pumpennocken hat jedoch den Vorteil, daß diese weniger belastet sind bzw. einfacher ausgeführt werden können.Another embodiment is given in dash-dotted lines, namely a separate single pump cam 25 on the valve camshaft 10 . This pump cam has four cam lifts 25 ', 25 '', 25 ''', 25 '''' and causes a fourfold promotion per camshaft revolution in the common supply line 3 , starting from the pressure lines 26 , 27 , 28 , 29 guide the injectors 19 to 22 . The distribution of the delivery rate over several single-piston pump elements and pump cams has the advantage, however, that these are less loaded or can be designed more simply.

In Fig. 2 ist die gesamte Kraftstoffeinspritzanlage 1 gezeigt, bei der aus einem Tank 30 Kraftstoff angesaugt und über eine Niederdruck-Versorgungsleitung 31 zu den Einzel-Kolben-Pumpen­ elementen gelangt, die als Steckpumpen ausgeführt sind und im verstärkten Deckel 32 über dem Zylinderkopf 33 der Brennkraft­ maschine untergebracht sind. In der Niederdruck-Versorgungs­ leitung 31 kann gegebenenfalls eine Vorförderpumpe 34 zwi­ schengeschaltet sein.In Fig. 2, the entire fuel injection system 1 is shown, in which fuel is drawn from a tank 30 and reaches the individual piston pumps via a low-pressure supply line 31 , which are designed as plug-in pumps and in the reinforced cover 32 above the cylinder head 33 the internal combustion engine are housed. In the low pressure supply line 31 , a pre-feed pump 34 may be interposed.

Um die bei üblichen hochdruckseitigen Druckregeleinrichtungen entstehenden Überströmverluste und die dadurch erforderliche zusätzliche Antriebsleitung zu vermeiden, kann eine Druckrege­ lung auch durch Veränderung des Zuflusses zu den Einzel-Kol­ ben-Pumpenelemente erfolgen, indem eine variable Drossel 35 zwischen Vorförderpumpe 34 und der gemeinsamen Niederdruck- Versorgungsleitung 31 angeordnet ist. Die Ansteuerung dieser Drossel 35 übernimmt ein elektronisches Steuergerät 36, welches Signale von einem Drucksensor 37 an der Hochdruck-Versorgungs­ leitung 3 und sonstige betriebsparameterabhängige Signale, wie Drehzahl n, Last l, Temperatur T zu einem Ansteuersignal ver­ arbeitet.In order to avoid the overflow losses that occur in conventional high-pressure pressure control devices and the additional drive line required as a result, pressure regulation can also be achieved by changing the inflow to the individual piston pump elements by a variable throttle 35 between the feed pump 34 and the common low-pressure supply line 31 is arranged. The control of this throttle 35 is performed by an electronic control unit 36 , which processes signals from a pressure sensor 37 on the high-pressure supply line 3 and other operating parameter-dependent signals, such as speed n, load l, temperature T, to form a control signal.

Claims (2)

1. Kraftstoffeinspritzanlage für eine mehrzylindrige Diesel- Brennkraftmaschine mit mindestens einer Ventilnockenwelle für die Betätigung von Gaswechselventilen, bei der eine mechanisch angetriebene Hochdruckpumpe Kraftstoff in eine für alle magnetventilgesteuerten Einspritzdüsen vorgesehene und als Druckspeicher wirkende gemeinsame Versorgungsleitung fördert, dadurch gekennzeichnet, daß der Antrieb für mindestens eine Hochdruckpumpe als Einzel- Kolben-Pumpenelement (4, 5, 6, 7) durch die die Gaswechselventile (8, 9) betätigende Ventilnockenwelle (10) selbst gebildet ist, derart, daß der die Gaswechselventile (8, 9) steuernde Ventil­ nocken zugleich Pumpennocken ist oder daß der Pumpennocken (23; 24) auf der Ventilnockenwelle (10) von dem Ventilnocken räumlich getrennt ausgeführt ist.1. Fuel injection system for a multi-cylinder diesel internal combustion engine with at least one valve camshaft for the actuation of gas exchange valves, in which a mechanically driven high-pressure pump delivers fuel into a common supply line provided for all solenoid-controlled injection nozzles and acts as a pressure accumulator, characterized in that the drive for at least one High-pressure pump as a single-piston pump element ( 4 , 5 , 6 , 7 ) is formed by the valve camshaft ( 10 ) actuating the gas exchange valves ( 8 , 9 ) in such a way that the valve controlling the gas exchange valves ( 8 , 9 ) also cam pump cams or that the pump cam ( 23 ; 24 ) on the valve camshaft ( 10 ) is spatially separated from the valve cam. 2. Kraftstoffeinspritzanlage nach Anspruch 1, dadurch gekennzeichnet, daß bei Anordnung mindestens eines separaten Pumpennockens ein Einzel-Kolben-Pumpenelement für mindestens zwei Zylinder durch einen Pumpennocken mit einer beliebigen Anzahl von Erhebungen antreibbar ist.2. Fuel injection system according to claim 1, characterized, that when arranging at least one separate pump cam Single piston pump element for at least two cylinders a pump cam with any number of bumps is drivable.
DE19934301069 1993-01-16 1993-01-16 Fuel injection on a diesel engine Ceased DE4301069A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934301069 DE4301069A1 (en) 1993-01-16 1993-01-16 Fuel injection on a diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934301069 DE4301069A1 (en) 1993-01-16 1993-01-16 Fuel injection on a diesel engine

Publications (1)

Publication Number Publication Date
DE4301069A1 true DE4301069A1 (en) 1994-07-21

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Family Applications (1)

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DE19934301069 Ceased DE4301069A1 (en) 1993-01-16 1993-01-16 Fuel injection on a diesel engine

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525694A1 (en) * 1995-07-14 1997-01-16 Mak Maschinenbau Krupp Injection device for an engine
DE19650246A1 (en) * 1996-12-04 1998-06-10 Bosch Gmbh Robert High-pressure fuel pump housed on engine wall
EP0892170A1 (en) * 1997-01-16 1999-01-20 Isuzu Motors Limited Fuel injection device for diesel engines
EP1132612A3 (en) * 2000-01-14 2002-10-30 Mazda Motor Corporation Fuel supply device for direct injection engine
EP1283330A1 (en) * 2001-07-04 2003-02-12 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Adapter for a high pressure injection pump for a direct injection piston combustion engine
EP3696422B1 (en) * 2017-10-09 2023-12-06 Beijing MKS Research Institute Rapid inflating and discharging device for protective suit and intelligent multi-purpose protective suit comprising same
WO2024003928A1 (en) * 2022-07-01 2024-01-04 Tvs Motor Company Limited A fuel injection system for a direct injection internal combustion engine and a method of control thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227742A1 (en) * 1981-07-31 1983-05-11 Steyr-Daimler-Puch AG, 1010 Wien FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES
DE3325510A1 (en) * 1983-07-15 1985-01-24 Ernst 6940 Weinheim Weidmann Timing mechanism for four-stroke internal combustion engines with a cam for actuating the intake and exhaust valve and the injection pump
DE3935883A1 (en) * 1989-10-27 1991-05-02 Kloeckner Humboldt Deutz Ag Four-stage diesel engine - has individual fuel injection pumps for cylinders
DE4017239A1 (en) * 1990-05-29 1991-12-05 Kloeckner Humboldt Deutz Ag Camshaft with several bearing discs and cams

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227742A1 (en) * 1981-07-31 1983-05-11 Steyr-Daimler-Puch AG, 1010 Wien FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES
DE3325510A1 (en) * 1983-07-15 1985-01-24 Ernst 6940 Weinheim Weidmann Timing mechanism for four-stroke internal combustion engines with a cam for actuating the intake and exhaust valve and the injection pump
DE3935883A1 (en) * 1989-10-27 1991-05-02 Kloeckner Humboldt Deutz Ag Four-stage diesel engine - has individual fuel injection pumps for cylinders
DE4017239A1 (en) * 1990-05-29 1991-12-05 Kloeckner Humboldt Deutz Ag Camshaft with several bearing discs and cams

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525694A1 (en) * 1995-07-14 1997-01-16 Mak Maschinenbau Krupp Injection device for an engine
DE19650246A1 (en) * 1996-12-04 1998-06-10 Bosch Gmbh Robert High-pressure fuel pump housed on engine wall
EP0892170A1 (en) * 1997-01-16 1999-01-20 Isuzu Motors Limited Fuel injection device for diesel engines
EP0892170A4 (en) * 1997-01-16 2003-05-07 Isuzu Motors Ltd Fuel injection device for diesel engines
EP1132612A3 (en) * 2000-01-14 2002-10-30 Mazda Motor Corporation Fuel supply device for direct injection engine
EP1283330A1 (en) * 2001-07-04 2003-02-12 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Adapter for a high pressure injection pump for a direct injection piston combustion engine
US6523518B2 (en) 2001-07-04 2003-02-25 Ford Global Technologies, Inc. Cylinder head assembly comprising a holder for the attachments of units
EP3696422B1 (en) * 2017-10-09 2023-12-06 Beijing MKS Research Institute Rapid inflating and discharging device for protective suit and intelligent multi-purpose protective suit comprising same
WO2024003928A1 (en) * 2022-07-01 2024-01-04 Tvs Motor Company Limited A fuel injection system for a direct injection internal combustion engine and a method of control thereof

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8127 New person/name/address of the applicant

Owner name: THOMA, FRANK, DIPL.-ING., 70192 STUTTGART, DE

8131 Rejection