EP1669582A1 - Integrated injection system - Google Patents

Integrated injection system Download PDF

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Publication number
EP1669582A1
EP1669582A1 EP04106278A EP04106278A EP1669582A1 EP 1669582 A1 EP1669582 A1 EP 1669582A1 EP 04106278 A EP04106278 A EP 04106278A EP 04106278 A EP04106278 A EP 04106278A EP 1669582 A1 EP1669582 A1 EP 1669582A1
Authority
EP
European Patent Office
Prior art keywords
injection system
cylinder head
internal combustion
hood
combustion engine
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.)
Granted
Application number
EP04106278A
Other languages
German (de)
French (fr)
Other versions
EP1669582B1 (en
Inventor
Guenther Bartsch
Ingo Lenz
Bert Pingen
Carsten Weber
Richard Fritsche
Andrej Rawdin
Walter Blume
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to DE200450011493 priority Critical patent/DE502004011493D1/en
Priority to DE200450006206 priority patent/DE502004006206D1/en
Priority to EP06114462A priority patent/EP1715168B1/en
Priority to EP20040106278 priority patent/EP1669582B1/en
Publication of EP1669582A1 publication Critical patent/EP1669582A1/en
Application granted granted Critical
Publication of EP1669582B1 publication Critical patent/EP1669582B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
    • F02M2200/185—Fuel-injection apparatus having means for maintaining safety not otherwise provided for means for improving crash safety
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to an internal combustion engine with a cylinder head, which is associated with an injection system, wherein a hood is connectable to the cylinder head.
  • EP 0 445 355 B1 relates to an apparatus and method for casting cylinder heads for internal combustion engines, and more particularly to core assemblies and elements, casting methods using such core assemblies and elements, and products of these methods, and to an apparatus having cylinder heads for internal combustion engines ,
  • the core assembly includes an inlet core having a plurality of core support and positioning surfaces, a coolant jacket core provided for insertion into the core assembly, the coolant jacket core having a plurality of core positioning portions provided to connect to a plurality of core support members. or positioning of the inlet core for supporting and positioning the coolant jacket core to engage the inlet core.
  • the core assembly also includes an outlet core adapted for insertion into the core assembly, the outlet core having a plurality of core positioning portions provided to engage a plurality of core support and positioning surfaces of the inlet core for supporting and positioning the core Outlet core on the inlet core, and further comprising a plurality of elongated, Auslrawkern forming portions which extend through the coolant jacket core, the inlet core further having a plurality of elongated, inlet-forming portions which extend through the coolant jacket core when the coolant jacket core in the core assembly is inserted.
  • the coolant jacket core, the outlet core and the inlet core are each one-piece cores and positioned by their core support and positioning exactly to each other.
  • the method is intended to provide a one-piece coolant jacket core, a one-piece outlet core, and a one-piece inlet core, wherein the one-piece coolant jacket core, one-piece outlet core and one-piece inlet core are interleaved to be supported and positioned against one another by cut surfaces.
  • the cylinder head casting has a long cylinder block closing portion for closing a plurality of cylinders formed in a block of an internal combustion engine and providing an air inlet and an air outlet.
  • the cylinder block closing portion has a plurality of spaced head portions provided to close the plurality of cylinders in the block.
  • the cylinder block closing portion further forms a plurality of air intake passages transverse to the long cylinder block closing portion and communicating with the plurality of spaced head portions, and forming a cylinder head side portion and an air intake manifold cavity extending along the cylinder head casting extends between the plurality of transverse air intake passages and the side of the cylinder head casting.
  • DE 198 01 171 C1 discloses a fuel injection device for a consisting of the crankcase, cylinder head and cylinder head cover multi-cylinder internal combustion engine with plug-in bores in the cylinder head and projecting into the combustion chamber of the engine to be supplied fuel injection valves and with a fuel injection valves and shielded by a housing part distribution bar.
  • the housing part is an outer and the cylinder head cover adjacent shielding.
  • the distributor strip accommodated in the shielding part is connected to the end regions of the fuel injection valves.
  • the longitudinal side wall of the cylinder head has, for a part of each fuel injection valve that is exposed from the receiving bore, exhaust nichelike indentations.
  • the injection system is attached laterally from the outside to the cylinder head or to an intake pipe.
  • the injection system is often located in a crash area of a motor vehicle and therefore must be increased Meet requirements for strength and ductility.
  • the injection system is extremely expensive from metallic components, such. As steel or aluminum assembled. The materials used also have a relatively high thermal conductivity, so that it may come to a fuel vapor bubble formation in the injection system.
  • hood in particular a valve cover or a valve cover with integration elements such as an intake system and the injection system in an extremely cost-intensive manner are designed as completely separate modules. An assembly of these two assemblies is extremely cumbersome and very expensive.
  • the invention has for its object to improve an internal combustion engine of the type mentioned with simple means to the effect that the injection system is crash-protected.
  • the invention has for its object to improve an internal combustion engine of the type mentioned with simple means to the extent that this is cheaper to produce.
  • the cylinder head with its inlet channels is designed such that the injection system between the intake ports and a cylinder head oil space is mountable, so that the injection system is arranged in a crash-protected interior
  • the injection system in the interior of the cylinder head between the cylinder head oil space and the intake ports are all critical, gasoline-carrying components crash-protected within the rigid cylinder head structure.
  • the injection system is virtually integrated in the cylinder head, which is surrounded on the one hand by the rigid or rigid cylinder head oil space and on the other hand by the rigid inlet channels.
  • the increased requirements for deformability can be omitted, which allows a much more cost-effective production.
  • the injection system has at least one injection nozzle and a supply strip, wherein the injection nozzle is arranged in an associated inlet channel.
  • the injection nozzle is preferably arranged with respect to a central axis at an acute angle, preferably at an angle of 15 °, in the inlet channel.
  • the injection system is preferably arranged on a "cold side" of the internal combustion engine, namely the inlet side, and can be favorably formed from a plastic.
  • a suitable plastic advantageously has a lower thermal conductivity than metal, so that the injection system heats up less quickly than in an embodiment of metal. This low heating advantageously reduces fuel vapor bubble formation in the injection system.
  • a common assembly consisting of hood and injection system is preferably made of a plastic according to the invention.
  • this common assembly can be arranged with its injection system in the crash-protected inner region between the intake ports and the cylinder head oil space.
  • the hood can, inter alia, take over the function of the intake air duct from an intake air collector to the cylinder head side intake duct.
  • the hood with the injection system preferably positively frictionally connected to the supply rail, in particular latched or screwed. It is also conceivable that the hood with the injection system, preferably cohesively connected to the supply rail, in particular glued and / or welded. In a further embodiment, it is possible that an upper part of the injection system, in particular an upper part whose supply strip is integrated into the hood, wherein a lower part of the injection system, in particular its supply strip separately connectable to the hood, for example screwed, locked, glued and / or welded is.
  • the hood itself can be configured in one piece or in several parts.
  • the injection system preferably the supply rail with the hood is made in one piece.
  • FIG. 1 shows a cylinder head 1 of an internal combustion engine.
  • a four-cylinder internal combustion engine is shown, wherein the individual cylinders are arranged in series.
  • the cylinder head 1 is associated with an injection system 2, which will be explained in more detail below.
  • a hood 21, not shown in Figure 1 is connected, which will be explained in more detail below.
  • the cylinder head 1 is designed with its intake ports 3 such that the injection system 2 between the intake ports 3 and a cylinder head oil chamber 4 can be mounted.
  • the inlet ducts 3 are made in one piece with the cylinder head 1 and, based on a central axis X, are directed away from it in the direction of the hood. In the illustrated embodiment, the inlet channels 3 are pulled to "outside" and bent upwards. It can clearly be seen in FIG. 2 that the inlet channels 3 run quasi in accordance with a quadrant section.
  • the injection system 2 has at least one injection nozzle 6 and an unillustrated supply strip 23 (FIGS. 3 to 6). Since in the illustrated embodiment, a four-cylinder in-line engine is shown, each injection port 3 is assigned according to an injection nozzle 6.
  • the injection nozzle 6 is arranged with respect to the central axis X at an acute angle, preferably at an angle of 15 °, in the inlet channel 3.
  • the supply rail 23 supplies each of the injectors 6 with fuel which is injected into the intake passage 3.
  • the supply bar 23 is described in more detail below as the hood 21 below.
  • receptacles 7 are arranged in the respective inlet channel.
  • a crash-protected inner area 8 is formed between the inlet channels 3 and the cylinder head oil space 4.
  • the injection system 2 is arranged.
  • the injection system 2 is thus arranged on a "cold side" of the internal combustion engine and that on its inlet side.
  • a bulkhead 14 for closing the inner region 8 is provided on the last inlet channel 3 relative to the control side 9.
  • the injection system 2 is quasi integrated in the cylinder head 1 and enough crash-protected.
  • a reinforcing wall 15 can be arranged, which additionally protects the crash-protected inner area 8 (FIG. 7).
  • openings 20 for cooling the cylinder head 1 and / or the liquid drain of possibly accumulating liquid, such as water may be introduced.
  • such a wall may also be provided between the wall 11 adjacent to the inlet channel 3 and the wall 11 itself, which may also have the aforementioned openings, wherein in the wall 11, of course, no opening is provided.
  • the openings 20 are made relatively large in the illustrated embodiment, and can of course be made smaller than shown.
  • FIG. 2 shows a perspective side view of the cylinder head 1.
  • the injection system 2 the timing chain channel 12 and the bulkhead 14 are not shown in order to be able to represent the design of the interior region 8 more clearly.
  • FIG. 2 shows a gearwheel 16 arranged on the control side 9, which shows a camshaft 17 with cams 18 arranged thereon. The cams 18 serve to control respective valves.
  • spark plugs 19 are each offset laterally, as seen in the longitudinal direction of the cylinder head 1, with each spark plug 19 associated with each intake port 3 or combustion chamber.
  • FIG. 1 and 2 a four-cylinder in-line engine with two valves per combustion chamber is shown.
  • the invention is of course not limited to this embodiment, so that internal combustion engines with more or fewer cylinders, or other cylinder arrangements according to the invention be ausgestaltbar, which is also conceivable to use other Steuertrieb- or valve train concepts instead of a timing chain.
  • the invention can also be used in internal combustion engines having more valves in each combustion chamber.
  • FIG. 3 shows a cross section through the above-mentioned hood 21 with an associated injection system 2.
  • the injection system 2 has the supply strip 23 and the injection nozzle 6 arranged thereon.
  • the injection system 2 and the hood 21 are separate components, which are positively frictionally connected to each other, preferably latched, so that a one-piece component for mounting is formed.
  • the supply strip 23 is seen in cross-section as a hollow duct with an example circular wall 24 configured, the duct seen in cross section, of course, can have any other meaningful design.
  • the wall 24 are associated on both sides latching elements 26 which engage in counter-locking means 27 which are incorporated in the hood 21.
  • the locking elements 26 are seen in cross-section L-shaped with an L-web 28 and a perpendicular thereto arranged L-leg 29 configured. With its L-web 28, the respective latching element 26 is connected to an outer periphery of the wall 24. At a free end 31 of the L-leg 29 is seen in cross-section approximately mushroom-shaped locking head 32 which cooperates with its locking edges 33 with corresponding locking surfaces of the counter-locking means 27.
  • the counter-locking means 27 are designed as movable rods 34, so that they initially dodge at a latching with the latching elements 26 to then spring back to their original position, wherein the locking edges 33 engage behind the latching surfaces kraftformschlüssig. In this position, the injection system 2 is sufficiently connected to the hood 21.
  • FIG. 4 shows a further embodiment of a possible connection of the hood 21 to the injection system 2.
  • a force-locking screw connection is shown in FIG.
  • the screw 37 is screwed into complementary threaded holes.
  • the threaded holes are in Bars introduced, which extend between the rods 34, so that the rods 34 are substantially rigid.
  • Figure 5 shows a further embodiment for connecting the hood 21 with the injection system 2.
  • the injection system 2 is designed with its supply strip 23 in two parts.
  • an upper part 38 of the supply strip 23 is made in one piece with the hood 21, wherein a lower part 39 of the supply strip 23 is made separately, wherein the lower part 39, the injection nozzle 6 is associated.
  • the supply bar 23 is formed in the connection of the upper part 38 with the lower part 39, so the connection of the lower part 39 with the hood 21, the supply bar 23 is formed.
  • the supply strip 23 is seen in this embodiment with its duct in cross-section oval designed.
  • the connection between the two parts 38 and 39 can be made with mutually corresponding connection surfaces 41.
  • Conceivable here is a screw, snap, adhesive or welded connection, wherein in Figure 5 by way of example an adhesive bond is shown.
  • FIG. 6 shows a component made entirely in one piece and consisting of the injection system 2, in particular its supply strip 23 and the hood 21.
  • the hood 21 may be referred to as a valve cover, which is connected in the embodiments according to Figures 3 to 6 with the inlet channel 3.
  • the hood 21 can thus u.a. take over the function of the intake air guide from an intake air collector, not shown, to the cylinder head side intake port 3.

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

Abstract

The injection system (2) is fitted to an internal combustion engine with the cylinder head (1). A holder can be connected to the cylinder head. The cylinder head is arranged so that the injection system is between the induction channels (3) and a cylinder head cavity (4). The injection system is connected to the wood so that a single construction element for assembly is formed.

Description

Die Erfindung betrifft einen Verbrennungsmotor mit einem Zylinderkopf, dem ein Einspritzsystem zugeordnet ist, wobei mit dem Zylinderkopf eine Haube verbindbar ist.The invention relates to an internal combustion engine with a cylinder head, which is associated with an injection system, wherein a hood is connectable to the cylinder head.

Die EP 0 445 355 B1 bezieht sich auf eine Vorrichtung und ein Verfahren zum Gießen von Zylinderköpfen für Verbrennungsmotoren, und insbesondere auf Kernanordnungen und -elemente, Gießverfahren, welche derartige Kernanordnungen und -elemente verwenden und Produkte dieser Verfahren, sowie eine Vorrichtung mit Zylinderköpfen für Verbrennungsmotoren.EP 0 445 355 B1 relates to an apparatus and method for casting cylinder heads for internal combustion engines, and more particularly to core assemblies and elements, casting methods using such core assemblies and elements, and products of these methods, and to an apparatus having cylinder heads for internal combustion engines ,

Die Kernanordnung enthält einen Einlaßkern mit einer Mehrzahl an Kernstütz- und positionierflächen, einen Kühlmittelmantelkern, der zum Einfügen in die Kernanordnung vorgesehen ist, wobei der Kühlmittelmantelkern eine Mehrzahl an Kernstütz- bzw. positionierabschnitten aufweist, die vorgesehen sind, um in eine Mehrzahl an Kernstütz- bzw. positionierflächen des Einlaßkerns zum Stützen und Positionieren des Kühlmittelmantelkerns am Einlaßkern einzugreifen. Die Kernanordnung enthält aber auch einen Auslaßkern, der zum Einfügen in die Kernanordnung vorgesehen ist, wobei der Auslaßkern eine Mehrzahl an Kernstütz- bzw. positionierabschnitten aufweist, die vorgesehen sind, um in eine Mehrzahl an Kernstütz- und positionierflächen des Einlaßkerns zum Stützen und Positionieren des Auslaßkerns auf dem Einlaßkern einzugreifen, und ferner eine Mehrzahl an länglichen, auslaßausbildenden Abschnitten aufweist, die sich durch den Kühlmittelmantelkern erstrecken, wobei der Einlaßkern ferner eine Mehrzahl an länglichen, einlaßausbildenden Abschnitten aufweist, die sich durch den Kühlmittelmantelkern erstrecken, wenn der Kühlmittelmantelkern in die Kernanordnung eingefügt ist. Der Kühlmittelmantelkern, der Auslaßkern und der Einlaßkern sind jeweils einteilige Kerne und durch ihre Kernstütz- und positionierflächen exakt zueinander positioniert.The core assembly includes an inlet core having a plurality of core support and positioning surfaces, a coolant jacket core provided for insertion into the core assembly, the coolant jacket core having a plurality of core positioning portions provided to connect to a plurality of core support members. or positioning of the inlet core for supporting and positioning the coolant jacket core to engage the inlet core. However, the core assembly also includes an outlet core adapted for insertion into the core assembly, the outlet core having a plurality of core positioning portions provided to engage a plurality of core support and positioning surfaces of the inlet core for supporting and positioning the core Outlet core on the inlet core, and further comprising a plurality of elongated, Auslaßkern forming portions which extend through the coolant jacket core, the inlet core further having a plurality of elongated, inlet-forming portions which extend through the coolant jacket core when the coolant jacket core in the core assembly is inserted. The coolant jacket core, the outlet core and the inlet core are each one-piece cores and positioned by their core support and positioning exactly to each other.

Das Verfahren soll einen einteiligen Kühlmittelmantelkern, einen einteiligen Auslaßkern und einen einteiligen Einlaßkern schaffen, wobei der einteilige Kühlmittelmantelkern, der einteilige Auslaßkern und der einteilige Einlaßkern verschachtelt vorgesehen sind, um aneinander durch Schnittflächen gestützt und positioniert zu werden.The method is intended to provide a one-piece coolant jacket core, a one-piece outlet core, and a one-piece inlet core, wherein the one-piece coolant jacket core, one-piece outlet core and one-piece inlet core are interleaved to be supported and positioned against one another by cut surfaces.

Das Zylinderkopf-Gußteil weist einen langen Zylinderblock-Schließabschnitt zum Schließen einer Mehrzahl an Zylindern auf, die in einem Block eines Verbrennungsmotors ausgebildet sind, und zum Schaffen eines Lufteintritts und eines Luftaustritts vorgesehen ist. Der Zylinderblock-Schließabschnitt weist eine Mehrzahl an beabstandeten Kopfabschnitten auf, die vorgesehen sind, um die Mehrzahl an Zylindern im Block zu schließen. Der Zylinderblock-Schließabschnitt bildet ferner eine Mehrzahl an Lufteinlaßkanälen aus, die zum langen Zylinderblock-Schließabschnitt quer verlaufen und mit der Mehrzahl an beabstandeten Kopfabschnitten in Verbindung stehen, und einen Zylinderkopf-Seitenabschnitt sowie einen Luftansaugkrümmer-Hohlraum ausbildet, der sich längs dem Zylinderkopf-Gußteil zwischen der Mehrzahl an quer verlaufenden Lufteinlaßkanälen und der Seite des Zylinderkopf-Gußteils erstreckt.The cylinder head casting has a long cylinder block closing portion for closing a plurality of cylinders formed in a block of an internal combustion engine and providing an air inlet and an air outlet. The cylinder block closing portion has a plurality of spaced head portions provided to close the plurality of cylinders in the block. The cylinder block closing portion further forms a plurality of air intake passages transverse to the long cylinder block closing portion and communicating with the plurality of spaced head portions, and forming a cylinder head side portion and an air intake manifold cavity extending along the cylinder head casting extends between the plurality of transverse air intake passages and the side of the cylinder head casting.

Die DE 198 01 171 C1 offenbart eine Kraftstoffeinspritzeinrichtung für eine aus Kurbelgehäuse, Zylinderkopf und Zylinderkopfhaube bestehende mehrzylindrige Brennkraftmaschine, mit in Aufnahmebohrungen im Zylinderkopf steckenden und in den Brennraum der zu versorgenden Brennkraftmaschine ragenden Kraftstoffeinspritzventilen sowie mit einer die Kraftstoffeinspritzventile verbindenden und durch ein Gehäuseteil abgeschirmten Verteilerleiste. Das Gehäuseteil ist ein außen liegendes und der Zylinderkopfhaube benachbartes Abschirmteil. Die in dem Abschirmteil aufgenommene Verteilerleiste ist an den Endbereichen der Kraftstoffeinspritzventile angeschlossen. Die Längsseitenwand des Zylinderkopfes weist für ein aus der Aufnahmebohrung freiliegend herausragenden Teil jedes Kraftstoffeinspritzventiles abgasseitig nischenartige Einbuchtungen auf.DE 198 01 171 C1 discloses a fuel injection device for a consisting of the crankcase, cylinder head and cylinder head cover multi-cylinder internal combustion engine with plug-in bores in the cylinder head and projecting into the combustion chamber of the engine to be supplied fuel injection valves and with a fuel injection valves and shielded by a housing part distribution bar. The housing part is an outer and the cylinder head cover adjacent shielding. The distributor strip accommodated in the shielding part is connected to the end regions of the fuel injection valves. The longitudinal side wall of the cylinder head has, for a part of each fuel injection valve that is exposed from the receiving bore, exhaust nichelike indentations.

Bekannt ist, daß das Einspritzsystem seitlich von außen an dem Zylinderkopf oder an einem Ansaugrohr befestigt wird. Hierbei ist das Einspritzsystem häufig in einem Crash-Bereich eines Kraftfahrzeuges angeordnet und muß daher erhöhten Anforderungen bezüglich Festigkeit und Verformbarkeit erfüllen. Um diesen Anforderungen zu entsprechen, ist das Einspritzsystem äußerst kostenintensiv aus metallischen Bauteilen, wie z. B. Stahl oder Aluminium zusammengesetzt. Die verwendeten Materialien besitzen zudem eine relativ große Wärmeleitfähigkeit, so daß es zu einer Kraftstoffdampfblasenbildung in dem Einspritzsystem kommen kann.It is known that the injection system is attached laterally from the outside to the cylinder head or to an intake pipe. Here, the injection system is often located in a crash area of a motor vehicle and therefore must be increased Meet requirements for strength and ductility. To meet these requirements, the injection system is extremely expensive from metallic components, such. As steel or aluminum assembled. The materials used also have a relatively high thermal conductivity, so that it may come to a fuel vapor bubble formation in the injection system.

Zudem werden die Haube, insbesondere eine Ventilhaube bzw. eine Ventilhaube mit Integrationselementen wie beispielsweise ein Ansaugsystem und das Einspritzsystem in äußerst kostenintensiver Weise als vollständig getrennte Baugruppen ausgeführt. Ein Zusammenbau dieser beiden Baugruppen ist äußerst umständlich und sehr kostenintensiv.In addition, the hood, in particular a valve cover or a valve cover with integration elements such as an intake system and the injection system in an extremely cost-intensive manner are designed as completely separate modules. An assembly of these two assemblies is extremely cumbersome and very expensive.

Der Erfindung liegt die Aufgabe zugrunde, einen Verbrennungsmotor der eingangs genannten Art mit einfachen Mitteln dahin gehend zu verbessern, daß das Einspritzsystem crashgeschützt ist. Zudem liegt der Erfindung die Aufgabe zugrunde, einen Verbrennungsmotor der eingangs genannten Art mit einfachen Mitteln dahin gehend zu verbessern, daß dieser kostengünstiger herstellbar ist.The invention has for its object to improve an internal combustion engine of the type mentioned with simple means to the effect that the injection system is crash-protected. In addition, the invention has for its object to improve an internal combustion engine of the type mentioned with simple means to the extent that this is cheaper to produce.

Die Aufgabe wird dadurch gelöst, daß der Zylinderkopf mit seinen Einlaßkanälen derart ausgestaltet ist, daß das Einspritzsystem zwischen den Einlaßkanälen und einem Zylinderkopfölraum montierbar ist, so daß das Einspritzsystem in einem crashgeschützten Innenbereich angeordnet istThe object is achieved in that the cylinder head with its inlet channels is designed such that the injection system between the intake ports and a cylinder head oil space is mountable, so that the injection system is arranged in a crash-protected interior

Mit der erfindungsgemäßen Anordnung des Einspritzsystems in dem Innenbereich des Zylinderkopfes zwischen dem Zylinderkopfölraum und den Einlaßkanälen liegen alle kritischen, benzinführenden Bauteile crashgeschützt innerhalb der steifen Zylinderkopfstruktur. Das Einspritzsystem ist quasi in dem Zylinderkopf integriert, wobei dieses einerseits durch den starren bzw., steifen Zylinderkopfölraum und andererseits durch die steifen Einlaßkanäle umgeben ist. Damit können auch die erhöhten Anforderungen an eine Verformbarkeit entfallen, wodurch eine erheblich kostengünstigere Produktion ermöglicht wird.With the inventive arrangement of the injection system in the interior of the cylinder head between the cylinder head oil space and the intake ports are all critical, gasoline-carrying components crash-protected within the rigid cylinder head structure. The injection system is virtually integrated in the cylinder head, which is surrounded on the one hand by the rigid or rigid cylinder head oil space and on the other hand by the rigid inlet channels. Thus, the increased requirements for deformability can be omitted, which allows a much more cost-effective production.

Günstig im Sinne der Erfindung ist, wenn die Einlaßkanäle einstückig mit dem Zylinderkopf hergestellt sind und bezogen auf eine Mittelachse von dieser weg gerichtet in Richtung zur Haube verlaufen. Zweckmäßigerweise weist das Einspritzsystem zumindest eine Einspritzdüse und eine Versorgungsleiste auf, wobei die Einspritzdüse in einem zugeordneten Einlaßkanal angeordnet ist. Die Einspritzdüse ist bevorzugt bezogen auf eine Mittelachse in einem spitzen Winkel, vorzugsweise in einem Winkel von 15°, in dem Einlaßkanal angeordnet.Favorable in the context of the invention is when the intake ports are made in one piece with the cylinder head and based on a central axis of this away directed towards the hood. Expediently, the injection system has at least one injection nozzle and a supply strip, wherein the injection nozzle is arranged in an associated inlet channel. The injection nozzle is preferably arranged with respect to a central axis at an acute angle, preferably at an angle of 15 °, in the inlet channel.

Das Einspritzsystem ist bevorzugt auf einer "kalten Seite" des Verbrennungsmotors, und zwar der Einlaßseite, angeordnet und kann Günstigerweise aus einem Kunststoff gebildet sein. Ein geeigneter Kunststoff weist vorteilhafterweise eine geringere Wärmeleitfähigkeit als Metall auf, so daß sich das Einspritzsystem weniger schnell aufheizt, als bei einer Ausgestaltung aus Metall. Durch diese geringe Aufheizung wird vorteilhaft eine Kraftstoffdampfblasenbildung in dem Einspritzsystem verringert.The injection system is preferably arranged on a "cold side" of the internal combustion engine, namely the inlet side, and can be favorably formed from a plastic. A suitable plastic advantageously has a lower thermal conductivity than metal, so that the injection system heats up less quickly than in an embodiment of metal. This low heating advantageously reduces fuel vapor bubble formation in the injection system.

In einer bevorzugten Ausgestaltung des Verbrennungsmotors ist es günstig im Sinne der Erfindung, wenn das Einspritzsystem derart mit der Haube verbindbar ist, daß ein zur Montage einteiliges Bauelement gebildet ist.In a preferred embodiment of the internal combustion engine, it is favorable in the context of the invention, when the injection system is so connected to the hood that a one-piece component for mounting is formed.

Dieser Ausgestaltung liegt die Erkenntnis zugrunde, daß eine gemeinsame Baugruppe aus Metall zwar denkbar wäre, aus Kosten- und Gewichtsgründen jedoch nicht wünschenswert ist. Von daher wird erfindungsgemäß eine gemeinsame Baugruppe, bestehend aus Haube und Einspritzsystem bevorzugt aus einem Kunststoff hergestellt.This embodiment is based on the finding that a common assembly of metal would be conceivable, but for cost and weight reasons is not desirable. Therefore, a common assembly, consisting of hood and injection system is preferably made of a plastic according to the invention.

Vorteilhafterweise kann diese gemeinsame Baugruppe mit seinem Einspritzsystem in dem crashgeschützten Innenbereich zwischen den Einlaßkanälen und dem Zylinderkopfölraum angeordnet werden. Hierbei kann die Haube unter anderem die Funktion der Ansaugluftführung von einem Ansaugluftsammler zum zylinderkopfseitigen Einlaßkanal übernehmen.Advantageously, this common assembly can be arranged with its injection system in the crash-protected inner region between the intake ports and the cylinder head oil space. In this case, the hood can, inter alia, take over the function of the intake air duct from an intake air collector to the cylinder head side intake duct.

Zweckmäßiger Weise kann die Haube mit dem Einspritzsystem, bevorzugt mit dessen Versorgungsleiste kraftformschlüssig verbunden, insbesondere verrastet oder verschraubt werden. Denkbar ist auch, daß die Haube mit dem Einspritzsystem, vorzugsweise mit dessen Versorgungsleiste stoffschlüssig verbunden, insbesondere verklebt und/oder verschweißt wird. In einer weiteren Ausgestaltung ist es möglich, daß ein Oberteil des Einspritzsystems, insbesondere ein Oberteil dessen Versorgungsleiste in die Haube integriert ist, wobei ein Unterteil des Einspritzsystems, insbesondere dessen Versorgungsleiste separat mit der Haube verbindbar, beispielsweise verschraubt, verrastet, verklebt und/oder verschweißt ist. Die Haube selber kann einteilig oder mehrteilig ausgestaltet sein. Zudem ist es denkbar, daß das Einspritzsystem, vorzugsweise dessen Versorgungsleiste mit der Haube einteilig hergestellt ist.Appropriately, the hood with the injection system, preferably positively frictionally connected to the supply rail, in particular latched or screwed. It is also conceivable that the hood with the injection system, preferably cohesively connected to the supply rail, in particular glued and / or welded. In a further embodiment, it is possible that an upper part of the injection system, in particular an upper part whose supply strip is integrated into the hood, wherein a lower part of the injection system, in particular its supply strip separately connectable to the hood, for example screwed, locked, glued and / or welded is. The hood itself can be configured in one piece or in several parts. In addition, it is conceivable that the injection system, preferably the supply rail with the hood is made in one piece.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen und der folgenden Figurenbeschreibung offenbart. Es zeigen:

Fig. 1
eine perspektivische Aufsicht auf einen Zylinderkopf,
Fig. 2
eine perspektivische Seitenansicht auf den Zylinderkopf aus Fig. 1,
Fig. 3
einen Querschnitt durch eine Haube mit einem Einspritzsystem,
Fig. 4
einen Querschnitt gemäß Figur 3 mit einer Verbindungsvariante,
Fig. 5
einen Querschnitt gemäß Figur 3 mit einem zweiteiligem Einspritzsystem,
Fig. 6
einen Querschnitt durch ein einteiliges Bauelement, und
Fig. 7
eine perspektivische Frontansicht des Zylinderkopfes aus Figur 2.
Further advantageous embodiments of the invention are disclosed in the subclaims and the following description of the figures. Show it:
Fig. 1
a perspective view of a cylinder head,
Fig. 2
3 a perspective side view of the cylinder head from FIG. 1,
Fig. 3
a cross section through a hood with an injection system,
Fig. 4
a cross section according to Figure 3 with a connection variant,
Fig. 5
a cross section according to Figure 3 with a two-part injection system,
Fig. 6
a cross section through a one-piece component, and
Fig. 7
a front perspective view of the cylinder head of Figure 2.

In den unterschiedlichen Figuren sind gleiche Teile stets mit denselben Bezugszeichen versehen, so daß diese in der Regel auch nur einmal beschrieben werden.In the different figures, the same parts are always provided with the same reference numerals, so that these are usually described only once.

Figur 1 zeigt einen Zylinderkopf 1 eines Verbrennungsmotors. In dem dargestellten Ausführungsbeispiel ist ein vierzylindriger Verbrennungsmotor dargestellt, wobei die einzelnen Zylinder in Reihe angeordnet sind. Dem Zylinderkopf 1 ist ein Einspritzsystem 2 zugeordnet, welches weiter unten näher erläutert wird. Mit dem Zylinderkopf 1 ist eine in Figur 1 nicht dargestellte Haube 21 verbindbar, die weiter unten näher erläutert wird. Der Zylinderkopf 1 ist mit seinen Einlaßkanälen 3 derart ausgestaltet, daß das Einspritzsystem 2 zwischen den Einlaßkanälen 3 und einem Zylinderkopfölraum 4 montierbar ist.FIG. 1 shows a cylinder head 1 of an internal combustion engine. In the illustrated embodiment, a four-cylinder internal combustion engine is shown, wherein the individual cylinders are arranged in series. The cylinder head 1 is associated with an injection system 2, which will be explained in more detail below. With the cylinder head 1, a hood 21, not shown in Figure 1 is connected, which will be explained in more detail below. The cylinder head 1 is designed with its intake ports 3 such that the injection system 2 between the intake ports 3 and a cylinder head oil chamber 4 can be mounted.

Die Einlaßkanäle 3 sind einstückig mit dem Zylinderkopf 1 hergestellt und bezogen auf eine Mittelachse X von dieser in Richtung zur Haube verlaufend weg gerichtet. In dem dargestellten Ausführungsbeispiel sind die Einlaßkanäle 3 nach "außen" gezogen und nach oben gebogen. In Figur 2 ist deutlich zu sehen, daß die Einlaßkanäle 3 quasi gemäß einem Viertelkreisabschnitt verlaufen.The inlet ducts 3 are made in one piece with the cylinder head 1 and, based on a central axis X, are directed away from it in the direction of the hood. In the illustrated embodiment, the inlet channels 3 are pulled to "outside" and bent upwards. It can clearly be seen in FIG. 2 that the inlet channels 3 run quasi in accordance with a quadrant section.

Das Einspritzsystem 2 weist zumindest eine Einspritzdüse 6 und eine nicht dargestellte Versorgungsleiste 23 (Figuren 3 bis 6) auf. Da in dem dargestellten Ausführungsbeispiel ein vierzylindriger Reihenmotor dargestellt ist, ist auch jedem Einlaßkanal 3 entsprechend eine Einspritzdüse 6 zugeordnet. Die Einspritzdüse 6 ist bezogen auf die Mittelachse X in einem spitzen Winkel, vorzugsweise in einem Winkel von 15°, in dem Einlaßkanal 3 angeordnet. Die Versorgungsleiste 23 versorgt jede einzelne der Einspritzdüsen 6 mit Kraftstoff, der in den Einlaßkanal 3 eingespritzt wird. Die Versorgungsleiste 23 wird wie die Haube 21 weiter unten näher beschrieben.The injection system 2 has at least one injection nozzle 6 and an unillustrated supply strip 23 (FIGS. 3 to 6). Since in the illustrated embodiment, a four-cylinder in-line engine is shown, each injection port 3 is assigned according to an injection nozzle 6. The injection nozzle 6 is arranged with respect to the central axis X at an acute angle, preferably at an angle of 15 °, in the inlet channel 3. The supply rail 23 supplies each of the injectors 6 with fuel which is injected into the intake passage 3. The supply bar 23 is described in more detail below as the hood 21 below.

Zur Aufnahme der Einspritzdüsen 6 sind in dem jeweiligen Einlaßkanal 3 Aufnahmen 7 angeordnet.For receiving the injection nozzles 6 3 receptacles 7 are arranged in the respective inlet channel.

Durch die erfindungsgemäße Anordnung und Ausgestaltung der Einlaßkanäle 3 wird, wie in den Figuren 1 und 2 deutlich zu sehen ist, zwischen den Einlaßkanälen 3 und dem Zylinderkopfölraum 4 ein crashgeschützter Innenbereich 8 gebildet. In diesem Innenbereich 8 ist das Einspritzsystem 2 angeordnet. Vorteilhaft ist das Einspritzsystem 2 somit auf einer "kalten Seite" des Verbrennungsmotors und zwar auf dessen Einlaßseite angeordnet.As a result of the arrangement and design of the inlet channels 3 according to the invention, as can clearly be seen in FIGS. 1 and 2, a crash-protected inner area 8 is formed between the inlet channels 3 and the cylinder head oil space 4. In this inner region 8, the injection system 2 is arranged. Advantageously, the injection system 2 is thus arranged on a "cold side" of the internal combustion engine and that on its inlet side.

An einer zur Steuerseite 9 gegenüberliegenden Seite 13 ist an dem, bezogen auf die Steuerseite 9 letzten Einlaßkanal 3, eine Schottwand 14 zum Abschluß des Innenbereiches 8 vorgesehen. Somit ist das Einspritzsystem 2 quasi in dem Zylinderkopf 1 integriert und genügend crashgeschützt. Zwischen den jeweiligen Einlaßkanälen 3 kann in Längsrichtung des Zylinderkopfes 1 gesehen jeweils eine Verstärkungswand 15 angeordnet sein, welche den crashgeschützten Innenbereich 8 zusätzlich schützt (Figur 7). In der Wand 15 können Öffnungen 20 zur Kühlung des Zylinderkopfes 1 und/oder zum Flüssigkeitsablauf von sich möglicherweise ansammelnder Flüssigkeit, beispielsweise Wasser eingebracht sein. Selbstverständlich kann eine solche Wand auch zwischen dem zur Wand 11 benachbarten Einlaßkanal 3 und der Wand 11 selbst vorgesehen sein, welche ebenfalls die vorgenannten Öffnungen aufweisen kann, wobei in der Wand 11 natürlich keine Öffnung vorgesehen ist. Die Öffnungen 20 sind in dem dargestellten Ausführungsbeispiel relativ groß ausgestaltet, und können selbstverständlich auch kleiner als dargestellt ausgeführt werden.On a side 13 opposite the control side 9, a bulkhead 14 for closing the inner region 8 is provided on the last inlet channel 3 relative to the control side 9. Thus, the injection system 2 is quasi integrated in the cylinder head 1 and enough crash-protected. Between the respective inlet channels 3, viewed in the longitudinal direction of the cylinder head 1, in each case a reinforcing wall 15 can be arranged, which additionally protects the crash-protected inner area 8 (FIG. 7). In the wall 15 openings 20 for cooling the cylinder head 1 and / or the liquid drain of possibly accumulating liquid, such as water may be introduced. Of course, such a wall may also be provided between the wall 11 adjacent to the inlet channel 3 and the wall 11 itself, which may also have the aforementioned openings, wherein in the wall 11, of course, no opening is provided. The openings 20 are made relatively large in the illustrated embodiment, and can of course be made smaller than shown.

In Figur 2 ist eine perspektivische Seitenansicht des Zylinderkopfes 1 dargestellt. Im Unterschied zu Figur 1 ist hier das Einspritzsystem 2, der Steuerkettenkanal 12 sowie die Schottwand 14 nicht dargestellt, um die Ausgestaltung des Innenbereiches 8 deutlicher darstellen zu können. In Figur 2 ist ein an der Steuerseite 9 angeordnetes Zahnrad 16 dargestellt, welches eine Nockenwelle 17 mit daran angeordneten Nocken 18 zeigt. Die Nocken 18 dienen zum Steuern jeweiliger Ventile.FIG. 2 shows a perspective side view of the cylinder head 1. In contrast to FIG. 1, here the injection system 2, the timing chain channel 12 and the bulkhead 14 are not shown in order to be able to represent the design of the interior region 8 more clearly. FIG. 2 shows a gearwheel 16 arranged on the control side 9, which shows a camshaft 17 with cams 18 arranged thereon. The cams 18 serve to control respective valves.

In der in den Figuren 1 und 2 gewählten Darstellung sind Zündkerzen 19 jeweils In Längsrichtung des Zylinderkopfes 1 gesehen seitlich beabstandet nach unten versetzt, wobei jedem Einlaßkanal 3 bzw. Brennraum eine Zündkerze 19 zugeordnet ist.In the illustration chosen in FIGS. 1 and 2, spark plugs 19 are each offset laterally, as seen in the longitudinal direction of the cylinder head 1, with each spark plug 19 associated with each intake port 3 or combustion chamber.

In den Figuren 1 und 2 ist ein Vierzylinder-Reihenmotor mit zwei Ventilen pro Brennraum dargestellt. Die Erfindung ist selbstverständlich nicht auf dieses Ausführungsbeispiel beschränkt, so daß auch Verbrennungsmotoren mit mehr oder weniger Zylindern, oder auch anderen Zylinderanordnungen erfindungsgemäß ausgestaltbar sind, wobei auch denkbar ist anstelle einer Steuerkette andere Steuertrieb- oder Ventiltriebkonzepte einzusetzen. Insbesondere sei darauf hingewiesen, daß die Erfindung auch bei Verbrennungsmotoren einsetzbar ist, die mehr Ventile im jeweiligen Brennraum aufweisen.In Figures 1 and 2, a four-cylinder in-line engine with two valves per combustion chamber is shown. The invention is of course not limited to this embodiment, so that internal combustion engines with more or fewer cylinders, or other cylinder arrangements according to the invention be ausgestaltbar, which is also conceivable to use other Steuertrieb- or valve train concepts instead of a timing chain. In particular, it should be noted that the invention can also be used in internal combustion engines having more valves in each combustion chamber.

Figur 3 zeigt einen Querschnitt durch die oben genannte Haube 21 mit einem damit verbundenen Einspritzsystem 2. Das Einspritzsystem 2 weist die Versorgungsleiste 23 und die daran angeordnet Einspritzdüse 6 auf. Das Einspritzsystem 2 und die Haube 21 sind separate Bauteile, die miteinander kraftformschlüssig verbunden, vorzugsweise verrastet sind, so daß ein zur Montage einteiliges Bauelement gebildet ist. Die Versorgungsleiste 23 ist im Querschnitt gesehen als hohler Leitungskanal mit einer beispielsweise runden Wandung 24 ausgestaltet, wobei der Leitungskanal im Querschnitt gesehen selbstverständlich jede andere sinnvolle Ausgestaltung aufweisen kann. Der Wandung 24 sind beidseitig Rastelemente 26 zugeordnet, die in Gegenrastmittel 27, die in der Haube 21 eingebracht sind eingreifen. Die Rastelemente 26 sind im Querschnitt gesehen L-förmig mit einem L-Steg 28 und einem senkrecht dazu angeordneten L-Schenkel 29 ausgestaltet. Mit seinem L-Steg 28 ist das jeweilige Rastelement 26 mit einem Außenumfang der Wandung 24 verbunden. An einem freien Ende 31 des L-Schenkels 29 ist ein im Querschnitt gesehen etwa pilzförmiger Rastkopf 32 angeordnet, der mit seinen Rastkanten 33 mit entsprechenden Rastflächen der Gegenrastmittel 27 zusammenwirkt. Die Gegenrastmittel 27 sind als bewegbare Stäbe 34 ausgestaltet, so daß diese bei einer Verrastung mit den Rastelementen 26 zunächst ausweichen, um anschließend in ihre Ausgangsposition zurück zu federn, wobei die Rastkanten 33 die Rastflächen kraftformschlüssig hintergreifen. In dieser Position ist das Einspritzsystem 2 genügend mit der Haube 21 verbunden.FIG. 3 shows a cross section through the above-mentioned hood 21 with an associated injection system 2. The injection system 2 has the supply strip 23 and the injection nozzle 6 arranged thereon. The injection system 2 and the hood 21 are separate components, which are positively frictionally connected to each other, preferably latched, so that a one-piece component for mounting is formed. The supply strip 23 is seen in cross-section as a hollow duct with an example circular wall 24 configured, the duct seen in cross section, of course, can have any other meaningful design. The wall 24 are associated on both sides latching elements 26 which engage in counter-locking means 27 which are incorporated in the hood 21. The locking elements 26 are seen in cross-section L-shaped with an L-web 28 and a perpendicular thereto arranged L-leg 29 configured. With its L-web 28, the respective latching element 26 is connected to an outer periphery of the wall 24. At a free end 31 of the L-leg 29 is seen in cross-section approximately mushroom-shaped locking head 32 which cooperates with its locking edges 33 with corresponding locking surfaces of the counter-locking means 27. The counter-locking means 27 are designed as movable rods 34, so that they initially dodge at a latching with the latching elements 26 to then spring back to their original position, wherein the locking edges 33 engage behind the latching surfaces kraftformschlüssig. In this position, the injection system 2 is sufficiently connected to the hood 21.

In Figur 4 ist eine weitere Ausgestaltung einer möglichen Verbindung der Haube 21 mit dem Einspritzsystem 2 dargestellt. Im Unterschied zu der in Figur 3 dargestellten Verbindung ist in Figur 4 eine kraftformschlüssige Schraubverbindung dargestellt. An der Wandung 24 ist beidseitig ein Fortsatz 36 angeordnet, in dem eine Durchgangsöffnung für eine Schraube 37 eingebracht ist. Die Schraube 37 wird in komplementäre Gewindebohrungen eingeschraubt. Die Gewindebohrungen sind in Stegen eingebracht, die sich zwischen den Stäben 34 erstrecken, so daß die Stäbe 34 im wesentlichen starr sind.FIG. 4 shows a further embodiment of a possible connection of the hood 21 to the injection system 2. In contrast to the connection shown in FIG. 3, a force-locking screw connection is shown in FIG. On the wall 24, an extension 36 is arranged on both sides, in which a passage opening for a screw 37 is introduced. The screw 37 is screwed into complementary threaded holes. The threaded holes are in Bars introduced, which extend between the rods 34, so that the rods 34 are substantially rigid.

Figur 5 zeigt eine weitere Ausgestaltung zur Verbindung der Haube 21 mit dem Einspritzsystem 2. Das Einspritzsystem 2 ist mit seiner Versorgungsleiste 23 zweiteilig ausgestaltet. Hierbei ist ein Oberteil 38 der Versorgungsleiste 23 einstückig mit der Haube 21 hergestellt, wobei ein Unterteil 39 der Versorgungsleiste 23 separat hergestellt ist, wobei dem Unterteil 39 die Einspritzdüse 6 zugeordnet ist. Bei der Verbindung des Oberteils 38 mit dem Unterteil 39, also der Verbindung des Unterteils 39 mit der Haube 21 wird die Versorgungsleiste 23 gebildet. Die Versorgungsleiste 23 ist in diesem Ausführungsbeispiel mit ihrem Leitungskanal im Querschnitt gesehen oval ausgestaltet. Die Verbindung zwischen beiden Teilen 38 bzw. 39 kann mit einander korrespondierenden Verbindungsflächen 41 hergestellt werden. Denkbar ist hier eine Schraub-, Rast-, Kleb- oder Schweißverbindung, wobei in Figur 5 beispielhaft eine Klebverbindung dargestellt ist.Figure 5 shows a further embodiment for connecting the hood 21 with the injection system 2. The injection system 2 is designed with its supply strip 23 in two parts. Here, an upper part 38 of the supply strip 23 is made in one piece with the hood 21, wherein a lower part 39 of the supply strip 23 is made separately, wherein the lower part 39, the injection nozzle 6 is associated. In the connection of the upper part 38 with the lower part 39, so the connection of the lower part 39 with the hood 21, the supply bar 23 is formed. The supply strip 23 is seen in this embodiment with its duct in cross-section oval designed. The connection between the two parts 38 and 39 can be made with mutually corresponding connection surfaces 41. Conceivable here is a screw, snap, adhesive or welded connection, wherein in Figure 5 by way of example an adhesive bond is shown.

In Figur 6 ist ein gänzlich einteilig hergestelltes Bauelement, das aus dem Einspritzsystem 2, insbesondere seiner Versorgungsleiste 23 und der Haube 21 besteht, dargestellt.FIG. 6 shows a component made entirely in one piece and consisting of the injection system 2, in particular its supply strip 23 and the hood 21.

Die Haube 21 kann als Ventilhaube bezeichnet werden, die in den Ausführungsbeispielen gemäß den Figuren 3 bis 6 mit dem Einlaßkanal 3 verbunden ist. Die Haube 21 kann somit u.a. die Funktion der Ansaugluftführung von einem nicht dargestellten Ansaugluftsammler zum zylinderkopfseitigen Einlaßkanal 3 übernehmen.The hood 21 may be referred to as a valve cover, which is connected in the embodiments according to Figures 3 to 6 with the inlet channel 3. The hood 21 can thus u.a. take over the function of the intake air guide from an intake air collector, not shown, to the cylinder head side intake port 3.

Claims (10)

Verbrennungsmotor mit einem Zylinderkopf (1), dem ein Einspritzsystem (2) zugeordnet ist, wobei mit dem Zylinderkopf (1) eine Haube (21) verbindbar ist,
dadurch gekennzeichnet, daß
der Zylinderkopf (1) mit seinen Einlaßkanälen (3) derart ausgestaltet ist, daß das Einspritzsystem (2) zwischen den Einlaßkanälen (3) und einem Zylinderkopfölraum (4) montierbar ist, so daß das Einspritzsystem (2) in einem crashgeschützten Innenbereich (8) angeordnet ist.Internal combustion engine with a cylinder head (1) to which an injection system (2) is assigned, wherein a hood (21) can be connected to the cylinder head (1),
characterized in that
the cylinder head (1) with its inlet channels (3) is designed in such a way that the injection system (2) can be mounted between the inlet channels (3) and a cylinder head oil space (4) so that the injection system (2) is protected in a crash-protected interior area (8). is arranged. Verbrennungsmotor nach Anspruch 1,
dadurch gekennzeichnet, daß
die Einlaßkanäle (3) einstückig mit dem Zylinderkopf (1) ausgebildet sind und bezogen auf eine Mittelachse (X-X) von dieser weg gerichtet in Richtung zur Haube (21) orientiert sind.Internal combustion engine according to claim 1,
characterized in that
the inlet channels (3) are integrally formed with the cylinder head (1) and oriented with respect to a central axis (XX) directed away from the latter in the direction of the hood (21). Verbrennungsmotor nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
das Einspritzsystem (2) zumindest eine Einspritzdüse (6) und eine Versorgungsleiste (23) aufweist, wobei die Einspritzdüse (6) mit ihrem Einspritzende in dem zugeordneten Einlaßkanal (3) angeordnet ist.Internal combustion engine according to claim 1 or 2,
characterized in that
the injection system (2) at least one injection nozzle (6) and a supply strip (23), wherein the injection nozzle (6) is arranged with its injection end in the associated inlet channel (3). Verbrennungsmotor nach Anspruch 3,
dadurch gekennzeichnet, daß
die Einspritzdüse (6) bezogen auf die Mittelachse (X-X) in einem spitzen Winkel, vorzugsweise in einem Winkel von 15°, in dem jeweils zugeordneten Einlaßkanal (3) angeordnet ist.Internal combustion engine according to claim 3,
characterized in that
the injection nozzle (6) with respect to the central axis (XX) at an acute angle, preferably at an angle of 15 °, in the respective associated inlet channel (3) is arranged. Verbrennungsmotor nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
das Einspritzsystem (2) bevorzugt aus einem Kunststoff gebildet ist.Internal combustion engine according to one of the preceding claims,
characterized in that
the injection system (2) is preferably formed from a plastic. Verbrennungsmotor mit einem Zylinderkopf (1), dem ein Einspritzsystem (2) zugeordnet ist, wobei mit dem Zylinderkopf (1) eine Haube verbindbar ist, insbesondere nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß
das Einspritzsystem (2) derart mit der Haube (21) verbindbar ist, daß ein zur Montage einteiliges Bauelement gebildet ist.Internal combustion engine with a cylinder head (1) to which an injection system (2) is assigned, wherein a hood can be connected to the cylinder head (1), in particular according to one of the preceding claims,
characterized in that
the injection system (2) can be connected to the hood (21) in such a way that a component which is integral to the assembly is formed. Verbrennungsmotor nach Anspruch 6,
dadurch gekennzeichnet, daß
die Haube (21) kraftformschlüssig mit dem Einspritzsystem (2), vorzugsweise mit dessen Versorgungsleiste (23) verbunden ist.Internal combustion engine according to claim 6,
characterized in that
the hood (21) frictionally engaged with the injection system (2), preferably with its supply strip (23) is connected. Verbrennungsmotor nach Anspruch 6,
dadurch gekennzeichnet, daß
die Haube (21) stoffschlüssig mit dem Einspritzsystem (2), vorzugsweise mit dessen Versorgungsleiste (23) verbunden ist.Internal combustion engine according to claim 6,
characterized in that
the hood (21) is materially connected to the injection system (2), preferably connected to its supply strip (23). Verbrennungsmotor nach Anspruch 6,
dadurch gekennzeichnet, daß
die Haube (21) einteilig mit dem Einspritzsystem (2), vorzugsweise mit dessen Versorgungsleiste (23) gebildet ist.Internal combustion engine according to claim 6,
characterized in that
the hood (21) is formed integrally with the injection system (2), preferably with its supply strip (23). Verbrennungsmotor nach einem der Ansprüche 6 bis 9,
dadurch gekennzeichnet, daß
das Bauelement aus einem Kunststoff gebildet ist.Internal combustion engine according to one of claims 6 to 9,
characterized in that
the component is formed from a plastic.
EP20040106278 2004-12-03 2004-12-03 Integrated injection system Not-in-force EP1669582B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE200450011493 DE502004011493D1 (en) 2004-12-03 2004-12-03 Integrated injection system
DE200450006206 DE502004006206D1 (en) 2004-12-03 2004-12-03 Integrated injection system
EP06114462A EP1715168B1 (en) 2004-12-03 2004-12-03 Integrated injection system
EP20040106278 EP1669582B1 (en) 2004-12-03 2004-12-03 Integrated injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040106278 EP1669582B1 (en) 2004-12-03 2004-12-03 Integrated injection system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP06114462A Division EP1715168B1 (en) 2004-12-03 2004-12-03 Integrated injection system

Publications (2)

Publication Number Publication Date
EP1669582A1 true EP1669582A1 (en) 2006-06-14
EP1669582B1 EP1669582B1 (en) 2008-02-13

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DE (2) DE502004006206D1 (en)

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DE102013016722A1 (en) * 2013-10-09 2015-04-09 Daimler Ag Integration of a fuel rail in the cylinder head cover of an internal combustion engine

Families Citing this family (1)

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FR2909731A1 (en) * 2006-12-08 2008-06-13 Renault Sas Internal combustion engine's part manufacturing method for vehicle, involves incorporating part of common fuel supply ramp into injection tubes by injecting synthetic material compatible with that of conduit of air intake splitter

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US4913119A (en) * 1988-08-03 1990-04-03 Usui Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
US5533485A (en) * 1994-06-27 1996-07-09 Robert Bosch Gmbh Fuel injection device for internal combustion engines
US5682859A (en) * 1996-01-22 1997-11-04 Siemens Automotive Corporation Method and arrangement for mounting fuel rails
US6076505A (en) * 1998-01-15 2000-06-20 Daimlerchrysler Ag Fuel injection arrangement for a multicylinder internal combustion engine
EP1146225A2 (en) * 2000-04-13 2001-10-17 Siemens Canada limited Snap fuel rail
EP1441122A1 (en) * 2003-01-24 2004-07-28 Nissan Motor Company, Limited Arrangement of protecting the fuel delivery tube of an engine

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Publication number Priority date Publication date Assignee Title
DE10251406B4 (en) * 2002-11-05 2013-08-22 Mann + Hummel Gmbh Suction module for an internal combustion engine
DE102013016722A1 (en) * 2013-10-09 2015-04-09 Daimler Ag Integration of a fuel rail in the cylinder head cover of an internal combustion engine

Also Published As

Publication number Publication date
DE502004006206D1 (en) 2008-03-27
EP1715168A1 (en) 2006-10-25
EP1715168B1 (en) 2010-08-04
EP1669582B1 (en) 2008-02-13
DE502004011493D1 (en) 2010-09-16

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