DE4315233A1 - Direct injection internal combustion engine - Google Patents

Direct injection internal combustion engine

Info

Publication number
DE4315233A1
DE4315233A1 DE4315233A DE4315233A DE4315233A1 DE 4315233 A1 DE4315233 A1 DE 4315233A1 DE 4315233 A DE4315233 A DE 4315233A DE 4315233 A DE4315233 A DE 4315233A DE 4315233 A1 DE4315233 A1 DE 4315233A1
Authority
DE
Germany
Prior art keywords
cylinder head
injection valve
internal combustion
combustion engine
engine according
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.)
Withdrawn
Application number
DE4315233A
Other languages
German (de)
Inventor
Georg Dipl Ing Eiermann
Janusz Dipl Ing Kwiatkowski
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 DE4315233A priority Critical patent/DE4315233A1/en
Publication of DE4315233A1 publication Critical patent/DE4315233A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • 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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The sealing casing separates the injection valve from an oil space limited by the cylinder head and the cylinder head cover. Fixture means are provided for fixing the position of the injection valve and consist of a tension paw (21) fitted in the oil space (16) and which presses the injection valve (11) via the permanently under pressure sealing casing (18) on a seat in the cylinder head (9).The sealing casing (18) is composed of a thin-walled casing section (18a) penetrating through the cylinder head cover (15) together with a thick-walled casing section (18b) facing the cylinder head (9). The transition between these casing sections (18a, 18b) is formed by a pressure shoulder (19,20) acting as support for the tension paw (21).

Description

Die Erfindung betrifft eine direkteinspritzende Brennkraftma­ schine mit einem im Zylinderkopf zwischen Gaswechselventilen angeordneten Kraftstoffeinspritzventil nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a direct injection internal combustion engine with one in the cylinder head between gas exchange valves arranged fuel injector according to the preamble of claim 1 specified features.

Bei Kraftstoffeinspritzventilen sowie bei Leitungsverbindungen besteht die Gefahr, daß im Laufe des Betriebes Undichtheiten auftreten, durch die Kraftstoff in den über dem Zylinderkopf gelegenen Ölraum eindringen und sich dort mit dem Schmieröl vermischen kann.For fuel injectors and pipe connections there is a risk of leakages during operation occur through the fuel in the over the cylinder head penetrate the oil space and there with the lubricating oil can mix.

Um diesem Nachteil entgegenzuwirken, ist gemäß der DE-PS 9 02 200 bereits eine Ausführung vorgeschlagen, bei der das Kraft­ stoffeinspritzventil von dem Ölraum der Brennkraftmaschine vollständig getrennt ist. Ein Schutzrohr bzw. eine Dichthülse ist in den Zylinderkopf zwischen den parallel zueinander lie­ genden Gaswechselventilen fest eingeschraubt, erstreckt sich durch den Ölraum und ragt aus der Zylinderkopfhaube heraus. Die Dichthülse ist außerdem mit der Zylinderkopfhaube verschraubt und durch eine Kontermutter gesichert. In der Dichthülse be­ findet sich das Einspritzventil, dessen im Freien liegender und Kraftstoffleitungsanschlüsse aufweisender Ventilkopf mit einer mit der Dichthülse fest verbundenen Überwurfmutter oder einem Flansch verschraubt ist. Durch die Schraubverbindung wird das Einspritzventil auf einen durch einen an der Dichthülse ange­ ordneten Innenbund gebildeten Sitz gepreßt.In order to counteract this disadvantage, according to DE-PS 9 02 200 already proposed an embodiment in which the force Fuel injection valve from the oil space of the internal combustion engine is completely separated. A protective tube or a sealing sleeve is in the cylinder head between the lie parallel to each other gas exchange valves screwed in, extends through the oil chamber and protrudes from the cylinder head cover. The The sealing sleeve is also screwed to the cylinder head cover and secured by a lock nut. Be in the sealing sleeve there is the injection valve, the one lying outside and Valve head having fuel line connections with a with the sealing sleeve firmly connected union nut or a Flange is screwed. The screw connection will  Injector on by a on the sealing sleeve arranged inner waist pressed seat.

Bei dieser Ausführung wird die Dichthülse bei auftretenden ho­ hen Brennraumdrücken auf Zug beansprucht, so daß ein Kraft­ stoffübertritt vom Brennraum in den Ölraum über die Schraub­ verbindung von Dichthülse und Zylinderkopf auf Dauer nicht auszuschließen ist.In this version, the sealing sleeve when ho occurs hen combustion chamber pressures on train, so that a force Material transfer from the combustion chamber into the oil chamber via the screw Permanent connection of the sealing sleeve and cylinder head is to be excluded.

Ferner ist aus der DE-GM 17 84 494 ein Kraftstoffeinspritzven­ til in einer Außenhülse bekannt, welche weitgehend im Zylin­ derkopf steckt und mit ihrem freien Ende ebenso wie das Ein­ spritzventil im Ölraum mündet. Somit liegt auch der Kraft­ stoffleitungsanschluß im Ölraum. Bei dieser Ausführung, aber auch bei der aus der EP 0 471 624 A2 bekannten Ausführung, be­ steht der Nachteil, daß im Falle einer Leckage - beispielsweise am Kraftstoffleitungsanschluß - austretender Kraftstoff in den Ölkreislauf gelangt und zu erheblichen Betriebsstörungen der Brennkraftmaschine führen kann.Furthermore, DE-GM 17 84 494 is a fuel injection valve til known in an outer sleeve, which is largely in the Zylin the head is stuck and with its free end just like the on spray valve opens into the oil compartment. So there is also strength Material line connection in the oil room. In this version, however also in the embodiment known from EP 0 471 624 A2, be there is the disadvantage that in the event of a leak - for example on Fuel line connector - fuel leaking into the Oil circuit arrives and significant malfunctions of the Internal combustion engine can lead.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einer di­ rekteinspritzenden Brennkraftmaschine nach der DE-PS 9 02 200 bauaufwandarme und platzsparende Maßnahmen vorzusehen, durch die das Eindringen von Kraftstoff in den zwischen Zylinderkopf und Zylinderkopfhaube liegenden Ölraum zuverlässig vermieden wird, wobei diese Maßnahmen auch für Brennkraftmaschinen in Vierventilanordnung pro Zylinder und mit zueinander wenig ge­ neigten Gaswechselventilen bzw. sehr engem V-Winkel der Ventile bis hin zur parallelen Anordnung dieser Ventile und auch bei Ausführung des Zylinderkopfes in Leichtbauweise geeignet ist.The invention is therefore based on the object in a di direct injection internal combustion engine according to DE-PS 9 02 200 to provide low-construction and space-saving measures by the penetration of fuel into between the cylinder head and the cylinder head cover reliably avoid lying oil space is, these measures also for internal combustion engines in Four-valve arrangement per cylinder and with little ge to each other inclined gas exchange valves or very narrow V-angle of the valves to the parallel arrangement of these valves and also at Execution of the cylinder head in lightweight construction is suitable.

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 vorteilhafte Weiterbildungen der Erfindung angegeben.Advantageous further developments are in the subclaims specified the invention.

Durch die besondere Anordnung und Ausbildung der für das Ein­ spritzventil vorgesehenen Befestigungsmaßnahmen ergibt sich eine kompakte, platzsparende Bauausführung bei zuverlässiger Abdichtung aufgrund der stets auf Druck beanspruchten Dicht­ hülse und des Einspritzventiles. Die im Ölraum eingesetzte Spannpratze gewährleistet über die Dichthülse einen festen Sitz des Einspritzventiles im Zylinderkopf sowie eine leckagefreie Trennung zwischen Einspritzventil und Ölraum, die noch durch die Dichtanordnung im zylinderkopfnahen Bereich sowie durch die Dichtung in der Zylinderkopfhaube verbessert wird.Due to the special arrangement and training of the for fixation measures provided results a compact, space-saving construction with reliable Sealing due to the tightness that is always under pressure sleeve and the injector. The one used in the oil room Clamping claw ensures a tight fit via the sealing sleeve of the injection valve in the cylinder head and a leak-free one Separation between the injector and the oil space that still through the sealing arrangement in the area near the cylinder head and by the Gasket in the cylinder head cover is improved.

Die erfindungsgemäße Ausführung ist auch für solche Brenn­ kraftmaschinen geeignet, die einen Zylinderkopf im Leichtme­ tallbauweise und ein Einspritzventil in Stahlausführung auf­ weisen. Die bei Temperaturänderungen auftretenden unterschied­ lichen Längenausdehnungen wirken sich hinsichtlich der zuver­ lässigen Abdichtung bzw. Trennungsmaßnahmen nicht nachteilig aus.The design according to the invention is also for such focal suitable engines that have a cylinder head in the Leichtme tall construction and a steel injection valve point. The difference that occurs with temperature changes Liche linear expansions affect the casual sealing or separation measures not disadvantageous out.

Ferner sind durch die schlanke Befestigungsart enge V-Winkel der Gaswechselventile auch bei einer Brennkraftmaschine in Vierventiltechnik pro Zylinder realisierbar, ebenso eine par­ allele Anordnung der Gaswechselventile untereinander mit dem Vorteil einer Schadraumminimierung im Brennraum.Furthermore, the slim type of fastening means that there are narrow V-angles of the gas exchange valves also in an internal combustion engine Four-valve technology can be implemented per cylinder, as well as a par allele arrangement of the gas exchange valves with each other with the Advantage of minimizing the dead space in the combustion chamber.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im folgenden näher beschrieben. Es zeigen:An embodiment of the invention is in the drawing shown and described in more detail below. Show it:

Fig. 1 den Erfindungsgegenstand im oberen Teil einer im Querschnitt dargestellten Brennkraftmaschine, Fig. 1 of the subject invention in the upper part of an internal combustion engine shown in cross section,

Fig. 2 den Erfindungsgegenstand nach der Linie II-II in Fig. 1 und Fig. 2 shows the subject of the invention along the line II-II in Fig. 1 and

Fig. 3 den Erfindungsgegenstand in der im Längsschnitt dargestellten Brennkraftmaschine. Fig. 3 shows the subject of the invention in the internal combustion engine shown in longitudinal section.

Eine luftverdichtende direkteinspritzende Brennkraftmaschine 1 mit jeweils zwei Einlaß- und Auslaßventilen 2, 3 für jeden Zy­ linder 4 sowie zwei obenliegenden Nockenwellen 5, 6, die über Schwinghebel 7, 8 die in einem engen V-Winkel zueinander ange­ ordneten Einlaß- und Auslaßventile 2, 3 antreiben, weist im leichtmetallausgeführten Zylinderkopf 9 eine zwischen den Ven­ tilen stufig ausgebildete Aufnahmebohrung 10 für ein einsteck­ bares Kraftstoffeinspritzventil 11 auf, dessen Düsenkörper 12 im durchmessermäßig kleineren Bohrungsabschnitt 10a und dessen Düsenhalter 13 im durchmessermäßig größeren Bohrungsabschnitt 10b steckt. Der einen Sitz für das Einspritzventil 11 bildende Absatz zwischen den Bohrungsabschnitten 10a, 10b ist mit 14 bezeichnet.An air-compressing direct-injection internal combustion engine 1 , each with two intake and exhaust valves 2 , 3 for each cylinder Zy 4 and two overhead camshafts 5 , 6 , the rocker arms 7 , 8 which are arranged in a narrow V-angle to each other intake and exhaust valves 2 , 3 drive, has in the light-metal cylinder head 9 a between the Ven tilen stepped receiving bore 10 for a plug-in fuel injector 11 , the nozzle body 12 in the smaller bore section 10 a and the nozzle holder 13 is in the larger bore section 10 b. The paragraph forming a seat for the injection valve 11 between the bore sections 10 a, 10 b is designated by 14 .

Das Einspritzventil 11 durchdringt den zwischen Zylinderkopf 9 und Zylinderkopfhaube 15 liegenden Ölraum 16 sowie die Zylin­ derkopfhaube 15. Somit ist der Kraftstoffleitungsanschluß 17 außerhalb des Ölraumes 16 angeordnet.The injection valve 11 penetrates through the oil space lying between the cylinder head 9 and the cylinder head cover 15 as well as the 16 Zylin derkopfhaube 15th The fuel line connection 17 is thus arranged outside the oil space 16 .

Das Einspritzventil 11 ist von einer langgestreckten Dichthülse 18 umgeben, die vom Zylinderkopf 9 ausgehend sich durch die Zylinderkopfhaube 15 hindurch erstreckt. Die obere Hälfte der Dichthülse 18 ist als dünnwandiger Hülsenabschnitt 18a und die untere Hälfte als dickwandiger Hülsenabschnitt 18b ausgebildet. Das obere Ende dieses Hülsenabschnittes 18b weist diametral gegenüberliegende Vorsprünge 19, 20 auf, die als Druckschulter für ein als Spannpratze 21 ausgebildetes Befestigungsmittel dienen. The injection valve 11 is surrounded by an elongate sealing sleeve 18 , which extends from the cylinder head 9 through the cylinder head cover 15 . The upper half of the sealing sleeve 18 is designed as a thin-walled sleeve section 18 a and the lower half as a thick-walled sleeve section 18 b. The upper end of this sleeve section 18 b has diametrically opposite projections 19 , 20 , which serve as a pressure shoulder for a fastening means designed as a clamping claw 21 .

Die Spannpratze 21 ist gabelförmig ausgeführt und liegt mit ihren Zinken 22, 23 auf den Vorsprüngen 19, 20 auf. Der dick­ wandige Hülsenabschnitt 18b ist im unteren Bereich mit einem Innenbund 24 versehen, der sich an einem Stützring 25 abstützt, welcher in einer Ringnut 26 im Einspritzventil 11 axialfest gelagert ist.The clamping claw 21 is fork-shaped and rests with its prongs 22 , 23 on the projections 19 , 20 . The thick-walled sleeve portion 18 b is provided in the lower region with an inner collar 24 which is supported on a support ring 25 which is axially fixed in an annular groove 26 in the injection valve 11 .

Die Spannpratze 21 wirkt als einarmiger Hebel, der sich einer­ seits an einem am Zylinderkopf 9 angeformten Höcker 27 (Fig. 3) abstützt und andererseits durch eine Spannschraube 28 über die Dichthülse 18 das Einspritzventil 11 unter Zwischenschaltung eines Dichtringes 29 auf seinen Sitz in der Aufnahmebohrung 10 preßt.The clamping claw 21 acts as a one-armed lever, which is supported on the one hand on a hump 27 formed on the cylinder head 9 ( FIG. 3) and, on the other hand, by means of a clamping screw 28 via the sealing sleeve 18, the injection valve 11 with the interposition of a sealing ring 29 on its seat in the receiving bore 10 presses.

Der Zylinderkopf 9 ist mit einem das Einspritzventil 11 umge­ benden Kragen 30 versehen, der außenwandig eine Ringnut 31 für einen Dichtring 32 aufweist, welcher an dem unterhalb des In­ nenbundes 24 liegenden und in diesem Bereich eine Innendurch­ messervergrößerung 18c aufweisenden Hülsenabschnitt 18b an­ liegt. Die Dichthülse 18 weist an ihrem dem Zylinderkopf 9 zu­ gewandten Ende einen Sicherheitsabstand zum Zylinderkopf 9 auf (Fig. 1), um einen leckagefreien Sitz des Einspritzventiles 11 sicherzustellen.The cylinder head 9 is provided with an injection valve 11 surrounding collar 30 , the outer wall of which has an annular groove 31 for a sealing ring 32 , which is located on the underneath the inner collar 24 and in this area an inside diameter enlargement 18 c having sleeve section 18 b . At its end facing the cylinder head 9, the sealing sleeve 18 has a safety distance from the cylinder head 9 ( FIG. 1) in order to ensure a leak-free seat of the injection valve 11 .

Die zylinderkopfhaubenseitige Abdichtung besteht aus einem Dichtring 33 als O-Ring oder Radialwellendichtring, der zwi­ schen dem dünnwandigen Hülsenteil 18a der Dichthülse 18 und der Zylinderkopfhaube liegt, die an dieser Stelle zu einem einwärts ragenden Ring 34 geformt ist.The cylinder head cover-side seal consists of a sealing ring 33 as an O-ring or radial shaft sealing ring, the rule between the thin-walled sleeve part 18 a of the sealing sleeve 18 and the cylinder head cover, which is formed at this point to an inwardly projecting ring 34 .

Claims (6)

1. Direkteinspritzende Brennkraftmaschine mit einem im Zylin­ derkopf zwischen Gaswechselventilen angeordneten Kraftstoff­ einspritzventil, mit einer das Einspritzventil umgebenden, vom Zylinderkopf aufragenden und die Zylinderkopfhaube durchdrin­ genden langgestreckten Dichthülse, die das Einspritzventil von einem von Zylinderkopf und Zylinderkopfhaube begrenzten Ölraum trennt, sowie mit einem Befestigungsmittel zur Lagefixierung des Einspritzventiles, dadurch gekennzeichnet, daß das Befestigungsmittel aus einer im Ölraum (16) unterge­ brachten Spannpratze (21) besteht und das Einspritzventil (11) über die ständig auf Druck beanspruchte Dichthülse (18) auf einen Sitz im Zylinderkopf (9) abdichtend drückt.1.Direct-injection internal combustion engine with a fuel injection valve arranged in the cylinder head between gas exchange valves, with an elongated sealing sleeve surrounding the injection valve, projecting from the cylinder head and penetrating the cylinder head cover, which separates the injection valve from an oil chamber delimited by the cylinder head and cylinder head cover, and with a fastening means Fixing the position of the injection valve, characterized in that the fastening means consists of a clamping claw ( 21 ) placed in the oil space ( 16 ) and presses the injection valve ( 11 ) sealingly against a seat in the cylinder head ( 9 ) via the sealing sleeve ( 18 ), which is constantly subjected to pressure . 2. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß sich die Dichthülse (18) aus einem die Zylinderkopfhaube (15) durchdringenden dünnwandigen Hülsenabschnitt (18a) sowie einem dem Zylinderkopf (9) zugewandten dickwandigen Hülsenab­ schnitt (18b) zusammensetzt, wobei der Übergang dieser Hülsen­ abschnitte (18a, 18b) durch eine als Abstützung für die Spann­ pratze (21) dienende Druckschulter (19, 20) gebildet ist.2. Internal combustion engine according to claim 1, characterized in that the sealing sleeve ( 18 ) from a the cylinder head cover ( 15 ) penetrating thin-walled sleeve section ( 18 a) and a section of the cylinder head ( 9 ) facing thick-walled Hülsenab ( 18 b), the Transition of these sleeve sections ( 18 a, 18 b) is formed by a pressure shoulder ( 19 , 20 ) serving as a support for the clamping claw ( 21 ). 3. Brennkraftmaschine nach Anspruch 2, dadurch gekennzeichnet, daß die Spannpratze (21) gabelförmig ausgebildet ist und mit ihren zwei Zinken (22, 23) auf der entsprechend angepaßten Druckschulter (19, 20) aufliegt.3. Internal combustion engine according to claim 2, characterized in that the clamping claw ( 21 ) is fork-shaped and rests with its two prongs ( 22 , 23 ) on the correspondingly adapted pressure shoulder ( 19 , 20 ). 4. Brennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Einspritzventil (11) eine in axialer Richtung wirkende Abstützfläche aufweist, an der sich ein an dem dickwandigen Hülsenabschnitt (18b) angeordneter Innenbund (24) abstützt.4. Internal combustion engine according to one of the preceding claims, characterized in that the injection valve ( 11 ) has an axially acting support surface on which an on the thick-walled sleeve portion ( 18 b) arranged inner collar ( 24 ) is supported. 5. Brennkraftmaschine nach Anspruch 4, dadurch gekennzeichnet, daß die Abstützfläche durch einen in einer Umfangsnut (26) des Einspritzventiles (11) axialfest gelagerten Stützring (25) ge­ bildet ist.5. Internal combustion engine according to claim 4, characterized in that the support surface by a in a circumferential groove ( 26 ) of the injection valve ( 11 ) axially fixed support ring ( 25 ) is ge. 6. Brennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der dickwandige Hülsenabschnitt (18b) unterhalb seines In­ nenbundes eine bis zum freien Ende reichende Innendurchmesser­ vergrößerung (18c) aufweist, zwischen der und einem das Ein­ spritzventil (11) umgebenden Kragen (30) am Zylinderkopf (9) ein Radialdichtring (32) vorgesehen ist.6. Internal combustion engine according to any one of the preceding claims, characterized in that the thick-walled sleeve portion ( 18 b) below its inner collar has an inner diameter enlargement reaching up to the free end ( 18 c), between which and an injection valve ( 11 ) surrounding the collar ( 30 ) a radial sealing ring ( 32 ) is provided on the cylinder head ( 9 ).
DE4315233A 1993-05-07 1993-05-07 Direct injection internal combustion engine Withdrawn DE4315233A1 (en)

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744530A1 (en) * 1995-05-22 1996-11-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Cylinder head
WO1997014879A1 (en) * 1995-10-17 1997-04-24 C.R.F. Societa' Consortile Per Azioni Internal combustion diesel engine for motor-vehicles, with direct injection
EP0774579A1 (en) * 1995-11-17 1997-05-21 Automobiles Peugeot Device for fastening a fuel injector to an internal combustion engine cylinder head
DE19600562C1 (en) * 1996-01-09 1997-05-22 Daimler Benz Ag Direct injection internal combustion engine
EP0775820A1 (en) * 1995-11-24 1997-05-28 Isuzu Motors Limited Injectors fixing structure for engines
DE19605934C1 (en) * 1996-02-17 1997-06-12 Audi Ag Cylinder head for IC engine with direct fuel injection
EP0780560A1 (en) * 1995-12-21 1997-06-25 Mercedes-Benz Ag Cylinder head for an internal combustion engine
DE19629308C1 (en) * 1996-07-20 1997-10-23 Daimler Benz Ag Cylinder head hood for direct-injection internal combustion engine
WO1998036169A1 (en) 1997-02-17 1998-08-20 Robert Bosch Gmbh Mounting device for a fuel injection valve
WO1998045595A1 (en) * 1997-04-10 1998-10-15 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head
EP0878622A1 (en) * 1997-05-16 1998-11-18 Renault Fixing flange of an injector
WO1998053197A1 (en) * 1997-05-20 1998-11-26 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head, and method for fixing said injector
EP0890726A3 (en) * 1997-07-12 1999-08-25 DEUTZ Aktiengesellschaft Four valve cylinder head with inclined valve arrangement
WO2000006881A1 (en) * 1998-07-25 2000-02-10 Audi Ag Cylinder head for a rotary piston combustion engine
WO2000006880A1 (en) * 1998-07-25 2000-02-10 Audi Ag Cylinder head
DE10025984A1 (en) * 2000-05-25 2001-11-29 Siemens Ag Clamp for a fuel injection valve has a raised laying surface to bear against the valve sleeve to give a secure and sealed fit at the cylinder without affecting the fuel injection action
EP1094213A3 (en) * 1999-10-18 2002-03-06 Hyundai Motor Company DOHC diesel engine cylinder head
DE10145988A1 (en) * 2001-09-18 2003-05-08 Siemens Ag Fastening arrangement for fastening injectors to a cylinder head
FR2867520A1 (en) * 2004-03-09 2005-09-16 Renault Sas Internal combustion engine for motor vehicle, has enclosure whose retainers have base walls that include outflow ports which communicate with exhaust pipe for allowing fuel leaks to flow outside cylinder head
FR2874662A1 (en) * 2004-08-27 2006-03-03 Honda Motor Co Ltd Direct injection internal combustion engine e.g. four stroke engine, for motorcycle, has injection nozzle holder with fixing part to fix injecting device on support boss, and forming singe block with rocker arm shaft holding device
DE19646920B4 (en) * 1995-11-14 2012-04-26 Denso Corporation Fuel injection system for engines
WO2020126765A1 (en) * 2018-12-17 2020-06-25 Man Truck & Bus Se Device for feeding gas fuel to a combustion chamber of an internal combustion engine

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DE513710C (en) * 1929-08-02 1930-12-01 Motoren Werke Mannheim Ag Fuel injection valve with pressure-controlled needle for compressorless diesel engines
DE902200C (en) * 1950-05-15 1954-01-21 Semt Central fuel valve for internal combustion engines
US2850000A (en) * 1955-12-19 1958-09-02 Worthington Corp Internal combustion engine
DE1097760B (en) * 1957-11-28 1961-01-19 Continental Motors Corp Fuel injection nozzle arrangement in the cylinder head of an internal combustion engine
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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744530A1 (en) * 1995-05-22 1996-11-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Cylinder head
WO1997014879A1 (en) * 1995-10-17 1997-04-24 C.R.F. Societa' Consortile Per Azioni Internal combustion diesel engine for motor-vehicles, with direct injection
US5927246A (en) * 1995-10-17 1999-07-27 C.R.F. Societa Consortile Per Azion Internal combustion Diesel engine for motor-vehicles, with direct injection
DE19646920B4 (en) * 1995-11-14 2012-04-26 Denso Corporation Fuel injection system for engines
EP0774579A1 (en) * 1995-11-17 1997-05-21 Automobiles Peugeot Device for fastening a fuel injector to an internal combustion engine cylinder head
FR2741396A1 (en) * 1995-11-17 1997-05-23 Peugeot DEVICE FOR FASTENING A FUEL INJECTOR TO A CELL OF AN INTERNAL COMBUSTION ENGINE
EP0775820A1 (en) * 1995-11-24 1997-05-28 Isuzu Motors Limited Injectors fixing structure for engines
US5711266A (en) * 1995-12-21 1998-01-27 Mercedes-Benz Ag Cylinder head for an internal combustion engine
EP0780560A1 (en) * 1995-12-21 1997-06-25 Mercedes-Benz Ag Cylinder head for an internal combustion engine
US5730101A (en) * 1996-01-09 1998-03-24 Mercedes-Benz Ag Fuel injector and motor brake valve mounting arrangement for an internal combustion engine with direct fuel injection
EP0784149A1 (en) 1996-01-09 1997-07-16 Mercedes-Benz Ag Direct injection internal combustion engine
DE19600562C1 (en) * 1996-01-09 1997-05-22 Daimler Benz Ag Direct injection internal combustion engine
DE19605934C1 (en) * 1996-02-17 1997-06-12 Audi Ag Cylinder head for IC engine with direct fuel injection
DE19629308C1 (en) * 1996-07-20 1997-10-23 Daimler Benz Ag Cylinder head hood for direct-injection internal combustion engine
US5803034A (en) * 1996-07-20 1998-09-08 Daimler-Benz Ag Cylinder head cover with drainage-grove indentation for an internal-combustion engine
US5960774A (en) * 1997-02-17 1999-10-05 Robert Bosch Gmbh Mounting device for a fuel injection valve
WO1998036169A1 (en) 1997-02-17 1998-08-20 Robert Bosch Gmbh Mounting device for a fuel injection valve
WO1998045595A1 (en) * 1997-04-10 1998-10-15 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head
FR2762051A1 (en) * 1997-04-10 1998-10-16 Peugeot DEVICE FOR FIXING A FUEL INJECTOR TO A CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE
CN1083937C (en) * 1997-04-10 2002-05-01 标致汽车公司 Device for fixing fuel fuel injecor on internal combustion engine cylinder head
US6116219A (en) * 1997-04-10 2000-09-12 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head
FR2763379A1 (en) * 1997-05-16 1998-11-20 Renault INJECTOR FIXING FLANGE
EP0878622A1 (en) * 1997-05-16 1998-11-18 Renault Fixing flange of an injector
WO1998053197A1 (en) * 1997-05-20 1998-11-26 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head, and method for fixing said injector
FR2763649A1 (en) * 1997-05-20 1998-11-27 Peugeot DEVICE FOR ATTACHING A FUEL INJECTOR TO A CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE, AND A METHOD FOR MOUNTING THIS INJECTOR
EP0890726A3 (en) * 1997-07-12 1999-08-25 DEUTZ Aktiengesellschaft Four valve cylinder head with inclined valve arrangement
WO2000006881A1 (en) * 1998-07-25 2000-02-10 Audi Ag Cylinder head for a rotary piston combustion engine
WO2000006880A1 (en) * 1998-07-25 2000-02-10 Audi Ag Cylinder head
EP1094213A3 (en) * 1999-10-18 2002-03-06 Hyundai Motor Company DOHC diesel engine cylinder head
US6408808B1 (en) 1999-10-18 2002-06-25 Hyundai Motor Company DOHC diesel engine cylinder head
DE10025984A1 (en) * 2000-05-25 2001-11-29 Siemens Ag Clamp for a fuel injection valve has a raised laying surface to bear against the valve sleeve to give a secure and sealed fit at the cylinder without affecting the fuel injection action
DE10025984B4 (en) * 2000-05-25 2014-07-03 Continental Automotive Gmbh Clamping means for clamping an injection valve
DE10145988A1 (en) * 2001-09-18 2003-05-08 Siemens Ag Fastening arrangement for fastening injectors to a cylinder head
US6886539B2 (en) 2001-09-18 2005-05-03 Siemens Aktiengesellschaft Device for fixing injectors on a cylinder head
FR2867520A1 (en) * 2004-03-09 2005-09-16 Renault Sas Internal combustion engine for motor vehicle, has enclosure whose retainers have base walls that include outflow ports which communicate with exhaust pipe for allowing fuel leaks to flow outside cylinder head
FR2874662A1 (en) * 2004-08-27 2006-03-03 Honda Motor Co Ltd Direct injection internal combustion engine e.g. four stroke engine, for motorcycle, has injection nozzle holder with fixing part to fix injecting device on support boss, and forming singe block with rocker arm shaft holding device
WO2020126765A1 (en) * 2018-12-17 2020-06-25 Man Truck & Bus Se Device for feeding gas fuel to a combustion chamber of an internal combustion engine

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