DE3209901C1 - Single-part cylinder head for a reciprocating piston internal combustion engine - Google Patents

Single-part cylinder head for a reciprocating piston internal combustion engine

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Publication number
DE3209901C1
DE3209901C1 DE19823209901 DE3209901A DE3209901C1 DE 3209901 C1 DE3209901 C1 DE 3209901C1 DE 19823209901 DE19823209901 DE 19823209901 DE 3209901 A DE3209901 A DE 3209901A DE 3209901 C1 DE3209901 C1 DE 3209901C1
Authority
DE
Germany
Prior art keywords
cylinder head
cylinder
camshafts
valves
fixing screws
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.)
Expired
Application number
DE19823209901
Other languages
German (de)
Inventor
Franz Dipl.-Ing. 8070 Ingolstandt Hauk
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.)
Audi AG
Original Assignee
Audi NSU Auto Union AG
Audi 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 Audi NSU Auto Union AG, Audi AG filed Critical Audi NSU Auto Union AG
Priority to DE19823209901 priority Critical patent/DE3209901C1/en
Application granted granted Critical
Publication of DE3209901C1 publication Critical patent/DE3209901C1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
    • 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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
    • 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
    • F01L1/02—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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B2023/085—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition using several spark plugs per cylinder
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Single-part cylinder head with two overhead camshafts, which by way of bucket tappets on each cylinder drive at least four suspended gas exhaust and refill valves, which are essentially arranged on both sides of the cylinder longitudinal centre plane and on one side have an angle of inclination of more than 5 DEG to the cylinder centre axis, bores terminating in the vicinity of the camshafts being provided in the cylinder head for fixing screws of the cylinder head on a cylinder block. In order to provide good access to the fixing screws, given a small, structurally favourable overall valve angle, the exhaust valves are aligned parallel to the cylinder centre axis and the bores for the fixing screws on the one hand on the side of the inlet valves inclined by 20 DEG lie inside the cylinder head area defined by the two camshafts, whereas the fixing screws on the opposite side lie outside this area.

Description

Die Erfindung betrifft einen einteiligen Zylinderkopf für eine Hubkolben-Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a one-piece cylinder head for a reciprocating internal combustion engine according to the Preamble of claim 1.

Ein derartiger, einteiliger Zylinderkopf ist durch die DE-OS 30 09 302 und die AT-PS 3 29 323 bekanntgeworden. Dabei beträgt der Neigungswinkel der symmetrisch ausgerichteten Gaswechselventile zur Zylinderachse jeweils ca. 20°, was einem Gesamtventilwinkel von ca. 40° ergibt. Ein derartiger Gesamtventilwinkel bewirkt einen relativ breit bauenden Zylinderkopf, was unter Umständen zu Einbauschwierigkeiten der Brennkraftmaschine in ein Gehäuse oder in einen Motorraum eines Kraftfahrzeuges oder zu einem erschwertem Anbau von Zusatzaggregaten führen kann.Such a one-piece cylinder head has become known from DE-OS 30 09 302 and AT-PS 3 29 323. The angle of inclination of the symmetrically aligned gas exchange valves is to Cylinder axis each approx. 20 °, which results in a total valve angle of approx. 40 °. Such a total valve angle causes a relatively wide cylinder head, which can lead to installation difficulties the internal combustion engine in a housing or in an engine compartment of a motor vehicle or to a can lead to more difficult attachment of additional units.

Eine Verkleinerung des Gesamtventilwinkels (GB-PS 56 401) auf z.B. 15° schafft zwar einen hinsichtlichdes Bauraumes günstigeren Zylinderkopf, jedoch muß dieser zweiteilig ausgeführt werden, damit die etwa unterhalb der Nockenwellen liegenden Zylinderkopfschrauben zugänglich sind. Ein derartiger, mehrteiliger Zylinderkopf ist jedoch in der Herstellung und Montage aufwendiger.A reduction of the total valve angle (GB-PS 56 401) to e.g. 15 ° creates a problem with regard to the Space cheaper cylinder head, but this must be made in two parts so that the approximately The cylinder head bolts located below the camshafts are accessible. One such, multi-part However, the cylinder head is more complex to manufacture and assemble.

Aufgabe der Erfindung ist es deshalb, den gattungsgemäßen, einteiligen Zylinderkopf derart weiterzubilden, daß er bei unvermindert freier Zugänglichkeit der Zylinderkopfschrauben schmäler baut und zusätzlich eine einen guten Verbrennungsablauf gewährleistende Brenriraumgestaltung ermöglicht.The object of the invention is therefore to develop the generic, one-piece cylinder head in such a way that that it builds narrower with unabated free accessibility of the cylinder head screws and in addition enables a combustion chamber design that ensures a good combustion process.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen "des Patentanspruchs 1 gelöst. Durch die unsymmetrische Anordnung der Neigungswinkel der Ventile zur Zylinderachse als auch der Bohrungen für die Zylinderkopfschrauben ergibt sich trotz einteiliger Ausführung des Zylinderkopfes und guter Zugänglichkeit der Zylinderkopfschrauben eine sehr schmale Bauart mit einem Gesamtventilwinkel um 20°. Es versteht sich, daß in Auslegung des Erfindungsgedankens eine Neigung der Auslaßventile um mehrere Grad zur Zylinderachse möglich sind, soweit die beschriebenen Vorteile wie kleiner Gesamtventilwinkel und gute Zugänglichkeit der Befestigungsschrauben bei einteiliger Bauart erhalten bleiben.This object is achieved according to the invention with the characterizing features "of claim 1 solved. Due to the asymmetrical arrangement of the angle of inclination of the valves to the cylinder axis as well the holes for the cylinder head bolts result despite the one-piece design of the cylinder head and good accessibility of the cylinder head screws a very narrow design with a total valve angle around 20 °. It goes without saying that in interpreting the concept of the invention an inclination of the exhaust valves by several Degrees to the cylinder axis are possible as long as the described advantages such as a small overall valve angle and good accessibility of the fastening screws are retained in the case of a one-piece design.

Eine vorteilhafte Weiterbildung der Erfindung ist den Merkmalen des Patentanspruchs 2 entnehmbar. Damit ergibt sich in Verbindung mit dem Kolben ein für die Ladungsaufbereitung und für den Verbrennungsablauf besonders günstiger Brennraum mit einer Quetschfläche und einer sich daran keilförmig anschließenden Verwirbelungszone, welche in einen unterhalb des Auslaßventiles liegenden kompakten Brennraumbereich einmündet. Die Kolbenoberfläche kann abgesehen von Ventiltaschen plan oder aber im Hinblick auf eine höhere Verdichtung in den zylinderkopfseitigen Brennraum ragend ausgebildet sein.An advantageous further development of the invention can be found in the features of claim 2. In order to In connection with the piston, this results in a charge preparation and combustion process Particularly favorable combustion chamber with a squeeze surface and a wedge-shaped adjoining it Swirl zone, which is located in a compact combustion chamber area below the exhaust valve joins. The piston surface can be flat apart from valve pockets or with a view to a higher compression in the cylinder head-side combustion chamber can be formed protruding.

Ein Ausführungsbeispiel der Erfindung ist im folgenden mit weiteren Einzelheiten näher erläutert Die Zeichnung zeigt inAn embodiment of the invention is explained in more detail below with further details The drawing shows in

F i g. 1 einen erfindungsgemäßen, quergeschnittenen Zylinderkopf in schematisierter Darstellung,F i g. 1 a cross-sectioned cylinder head according to the invention in a schematic representation,

Fig.2 eine Draufsicht auf den Zylinderkopf nach Fig. 1, jedoch ohne Ventildeckel und Ventilsteuerungselemente, 2 shows a plan view of the cylinder head according to Fig. 1, but without valve cover and valve control elements,

F ig. 3 einen Schnitt gemäß Linie HI-III der F i g. 2,
F i g. 4 einen Schnitt gemäß Linie IV-IV der F i g. 2,Fig. 3 shows a section along line HI-III in FIG. 2,
F i g. 4 shows a section along line IV-IV of FIG. 2,

F i g. 5 einen Schnitt gemäß Linie V-V der F i g. 2 und F i g. 6 eine Draufsicht auf die Zylinderkopf-Auflagefläche. F i g. 5 shows a section along line V-V in FIG. 2 and F i g. 6 is a plan view of the cylinder head support surface.

In dem einteiligen Zylinderkopf 10 einer Hubkolben-Brennkraftmaschine mit einem Zylinderblock 12 sind je Zylinder 14 vier Gaswechselventile bzw. zwei Auslaßventile 16 und zwei Einlaßventile 18 angeordnet. Diese Ventile 16, 18 sind in Ventilführungen 20 verschiebbar geführt, welche Ventilführungen in entsprechenden Bohrungen 22 des Zylinderkopfes 10 eingepreßt sind.In the one-piece cylinder head 10 of a reciprocating internal combustion engine with a cylinder block 12, there are four gas exchange valves or two exhaust valves per cylinder 14 16 and two inlet valves 18 are arranged. These valves 16, 18 can be displaced in valve guides 20 guided, which valve guides are pressed into corresponding bores 22 of the cylinder head 10.

Die Ventile 16, 18 steuern im Zylinderkopf 10 vorgesehene Ein- und Auslaßkanäle 24,26 und werden durch Ventilfedern 28 in bekannter Weise in Schließrichtung vorgespannt In die Auflagefläche 10a des Zylinderkopfes 10 am Zylinderblock 12 ist je Zylinder eine im wesentlichen kreisscheibenförmige Vertiefung eingearbeitet, welche in Verbindung mit dem Boden eines entsprechenden Kolbens 30 einen Brennraum 32 einschließt.The valves 16, 18 control inlet and outlet channels 24, 26 provided in the cylinder head 10 and are biased by valve springs 28 in a known manner in the closing direction into the support surface 10a of the Cylinder head 10 on cylinder block 12 is a substantially circular disk-shaped recess per cylinder incorporated, which in connection with the bottom of a corresponding piston 30 has a combustion chamber 32 includes.

Über die Ventilfedern 28 sind Tassenstößel 34 gestülpt, die verschiebbar in Tassenstößel-Führungen 36 des Zylinderkopfes 10 gelagert sind. An der Stirnfläche der Tassenstößel 34 laufen die Nocken 38, 40 von zwei Nockenwellen 42,44 an, welche die Gaswechselventile in der bei einem Viertaktmotor üblichen Steuerfolge antreiben.Bucket tappets 34 are slipped over the valve springs 28 and are displaceable in bucket tappet guides 36 of the cylinder head 10 are mounted. The cams 38, 40 of two run on the end face of the bucket tappets 34 Camshafts 42, 44, which control the gas exchange valves in the control sequence customary in a four-stroke engine drive.

Innerhalb des Zylinderkopfes 10 sind Zündkerzenschächte 46 ausgebildet, über die etwa zentral zwischen den vier Ventilen 16, 18 in die Brennräume 32 einragende Zündkerzen 48 in entsprechende Gewindebohrungen 50 einsetzbar sind (siehe Fig. 1, 5 und 6). Eine jeweils zweite Zündkerze 52 ist über seitlich vorgesehene Gewindebohrungen 54 angeordnet und ragt etwa benachbart den Auslaßventilen 16 (sieheSpark plug wells 46 are formed within the cylinder head 10, via which approximately centrally between the four valves 16, 18 protruding into the combustion chambers 32 spark plugs 48 in corresponding threaded bores 50 can be used (see FIGS. 1, 5 and 6). A second spark plug 52 is arranged via laterally provided threaded bores 54 and protrudes approximately adjacent to the exhaust valves 16 (see

F i g. 6) in den Brennraum 32.F i g. 6) into the combustion chamber 32.

Die die beschriebene Ventilsteuerung aufnehmende Seite des Zylinderkopfes 10 ist mittels eines Ventildekkels 56 dicht verschlossen.The side of the cylinder head 10 receiving the valve control described is by means of a valve cover 56 tightly closed.

Wie der F i g. 6 entnehmbar ist, sind die Einlaßventile 18 und die Auslaßventile 16 in einer jeweils einheitlichen Ebene angeordnet. Dabei sind die Auslaßventile 16 (dargestellt durch Mittelachse 58, siehe F i g. 3) parallel zur Zylinder-Längsmittelachse 60 angeordnet, während die Einlaßventile 18 (Mittelachse 62) einen Neigungswinkel oc von 20° nach oben außen aufweisen.As the fig. 6 can be seen, the inlet valves 18 and the outlet valves 16 are each arranged in a uniform plane. The outlet valves 16 (represented by the central axis 58, see FIG. 3) are arranged parallel to the cylinder longitudinal central axis 60, while the inlet valves 18 (central axis 62) have an angle of inclination oc of 20 ° upwards and outwards.

Die Auslaßventile 16 sind jeweils derart von der Zylinderkopf-Auflagefläche 10a zurückgesetzt, daß deren dem Brennraum 32 zugewandte Flächenebene des Ventiltellers 16a die aufgrund des Neigungswinkels höher liegende Umlaufkante 18a des Ventiltellers 186 des Einlaßventiles 18 schneidet, während die diametral gegenüberliegende Umlaufkante 18c an eine einen Kreissegmentabschnitt des Kolbens 30 überragende Quetschfläche 10Z>des Zylinderkopfes 10 anschließt.The exhaust valves 16 are each set back from the cylinder head support surface 10a that whose surface plane of the valve disk 16a facing the combustion chamber 32 is due to the angle of inclination higher lying circumferential edge 18a of the valve disk 186 of the inlet valve 18 intersects, while the diametrically opposite peripheral edge 18c to a segment of a circle of the piston 30 protruding Pinch surface 10Z> of the cylinder head 10 connects.

Im Zylinderkopf 10 sind parallel zur Längsmittelachse 60 Bohrungen 64 vorgesehen (siehe Fig.2, 4 und 6), welche jeweils quadratisch' und im Bezug zum Brennraum 32 symmetrisch ausgerichtet sind. Die Bohrungen 64 dienen in bekannter Weise zur Aufnahme entsprechender Zylinderkopfschrauben (nicht dargestellt), mittels der der Zylinderkopf 10 mit dem Zylinderblock 12 dicht verschraubbar ist.In the cylinder head 10, bores 64 are provided parallel to the longitudinal center axis 60 (see FIGS. 2, 4 and 6), which are each square 'and aligned symmetrically in relation to the combustion chamber 32. the Bores 64 are used in a known manner to accommodate corresponding cylinder head screws (not shown), by means of which the cylinder head 10 can be screwed tightly to the cylinder block 12.

Aufgrund der beschriebenen Anordnung der Ventile 16, 18 liegen die Bohrungen 64 (siehe insbesondere F i g. 3, gestrichelt angedeutete Bohrungen 64 und F i g. 2) in Höhe der Tassenstößel-Führungen 36 bei den parallel zur Zylindermittelachse 60 angeordneten Auslaßventilen 16 außerhalb einer durch die Tassenstößel-Führungen 36 verlaufenden Längsmittelebene (= Mittelachsen 58) und bei den 20° geneigten Einlaßventilen 18 innerhalb dieser Längsmittelebene (= Mittelachsen 62). Unter dem Begriff »innerhalb« ist hier zu verstehen, daß die Bohrungen 64 innerhalb des durch die Zylinder-Längsmittelebene (= Zylindermittelachsen 60) und die Längsmittelebene der Tassenstößel-Flührungen 36 definierten Bereiches liegen, während dieDue to the described arrangement of the valves 16, 18, the bores 64 (see in particular F i g. 3, holes 64 and F i g indicated by dashed lines. 2) at the level of the bucket tappet guides 36 at the Outlet valves 16 arranged parallel to the cylinder center axis 60 outside one through the bucket tappet guides 36 extending longitudinal center plane (= center axes 58) and in the case of the inlet valves 18 inclined at 20 ° within this longitudinal center plane (= Central axes 62). The term "within" is to be understood here that the holes 64 within the through the cylinder longitudinal center plane (= cylinder center axes 60) and the longitudinal center plane of the bucket tappet guides 36 defined area, while the

ίο anderen Bohrungen 64 entsprechend außerhalb liegen. An den Zylinderkopf 10 sind oberhalb der Tassenstößel-Führungen jeweils zwischen den zwei Einlaß- bzw. Auslaßventilen 16, 18 je Zylinder Lagerstühle 66, 68 angegossen, die in Verbindung mit anschraubbaren Lagerbrücken 70 (siehe F i g. 5) die Lagerstellen für die beiden Nockenwellen 42,44 bilden. Die Lagerstühle 66, 68 sind im Einschubbereich der Tassenstößel 34 in ihre Führungen 36 mit kreissegmentförmigen Ausnehmungen 72 versehen, die eine sehr gedrängte Anordnung der Tassenstößel 34 ermöglichen. Bezüglich der Lagerung der Nockenwellen 42,44 haben diese eine Verringerung der Lagerbreite ergebenden Ausnehmungen 72 keinen nachteiligen Einfluß, weil die weit höheren Lagerdrücke verursacht durch die Ventilfedern 28 auf die in ihrer Lagerbreite unverringerten Lagerbrücken 70 wirken.ίο the other bores 64 are accordingly outside. On the cylinder head 10 are above the bucket tappet guides between the two inlet and Exhaust valves 16, 18 cast on each cylinder bearing blocks 66, 68, which can be screwed on in conjunction with Bearing bridges 70 (see FIG. 5) form the bearing points for the two camshafts 42, 44. The camp chairs 66, 68 are in the insertion area of the bucket tappets 34 in their guides 36 with circular segment-shaped recesses 72, which allow a very compact arrangement of the bucket tappets 34. Regarding storage of the camshafts 42, 44 this has a reduction the bearing width resulting recesses 72 no adverse effect, because the much higher bearing pressures caused by the valve springs 28 act on the bearing brackets 70, which are not reduced in their bearing width.

Durch die gedrängte Anordnung der Tassenstößel 34 aufgrund der Ausnehmungen 72 werden zudem die Biegekräfte auf die Nockenwellen 42,44 verringert und deren Schmierung zwischen Nocken und Tassenstößel-Anlaufflächen verbessert. Selbstverständlich ist es in diesem Zusammenhang wichtig, das Schmieröl für die Nockenwellen-Lagerstellen durch Kanäle in den Nokkenwellen zuzuführen.Due to the compact arrangement of the bucket tappets 34 due to the recesses 72, the Bending forces on the camshafts 42, 44 are reduced and their lubrication between the cam and the bucket tappet contact surfaces improved. Of course, in this context it is important to use the lubricating oil for the To supply camshaft bearings through channels in the camshafts.

Hierzu 5 Blatt ZeichnungenIn addition 5 sheets of drawings

Claims (1)

Patentansprüche:Patent claims: 1. Einteiliger Zylinderkopf für eine Hubkolben-Brennkraftmaschine, mit zwei oben liegenden Nockenwellen, die über Tassenstößel je Zylinder zumindest vier hängend angeordnete Gaswechselventile antreiben, welche im wesentlichen beiderseits der Zylinder-Längsmittelebene angeordnet und auf der einen Seite einen Neigungswinkel von größer als 5° zur Zylindermittelachse aufweisen, wobei im Zylinderkopf in Nähe der Nockenwellen endende Bohrungen für Befestigungsschrauben des Zylinderkopfes an einen Zylinderblock vorgesehen sind, dadurch gekennzeichnet, daß die Auslaßventile (16) parallel zur Zylindermittelachse ausgerichtet sind und daß die Bohrungen (64) für die Befestigungsschrauben zum einen auf der Seite der um 20° geneigten Einlaßventile (18) innerhalb des durch die beiden Nockenwellen (42,44) begrenzten Zylinderkopfbereiches liegen, während die Befestigungsschrauben auf der gegenüberliegenden Seite außerhalb dieses Bereiches liegen.1. One-piece cylinder head for a reciprocating internal combustion engine, with two overhead camshafts, the at least four suspended gas exchange valves per cylinder via bucket tappets drive, which are arranged and essentially on both sides of the cylinder longitudinal center plane have an angle of inclination greater than 5 ° to the cylinder center axis on one side, whereby in the cylinder head in the vicinity of the camshafts ending holes for fastening screws of the Cylinder head are provided on a cylinder block, characterized in that the Exhaust valves (16) are aligned parallel to the cylinder center axis and that the bores (64) for the Fastening screws on the one hand on the side of the inlet valves (18) inclined by 20 ° within the by the two camshafts (42, 44) are limited cylinder head area, while the fastening screws lie outside this area on the opposite side. 2, Zylinderkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Ventilteller (16a,) der Auslaßventile (16) gegenüber der Zylinderkopf-Auflagefläche (tOa) derart zurückgesetzt sind„daß deren Ventiltellerebene mit der zurückgesetzt liegenden Umlaufkante (18a^ der Ventilteller (i8b) der um 20° geneigten Einlaßventile (18) übereinstimmt, wobei der diametral entgegengesetzt liegende Bereich der Umlaufkante (i8c)an eine einen Kreissegmentabschnitt des Kolbens (30) überragende Quetschfläche (tOb) des Zylinderkopfes (10) anschließt.2, cylinder head according to claim 1, characterized in that the valve disks (16a,) of the exhaust valves (16) are set back relative to the cylinder head support surface (tOa) in such a way that their valve disk plane with the recessed peripheral edge (18a ^ of the valve disk (i8b)) of the inlet valves (18) inclined by 20 °, the diametrically opposite area of the circumferential edge (i8c) adjoining a squeeze surface (tOb) of the cylinder head (10) protruding over a segment of a circle of the piston (30).
DE19823209901 1982-03-18 1982-03-18 Single-part cylinder head for a reciprocating piston internal combustion engine Expired DE3209901C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823209901 DE3209901C1 (en) 1982-03-18 1982-03-18 Single-part cylinder head for a reciprocating piston internal combustion engine

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DE19823209901 DE3209901C1 (en) 1982-03-18 1982-03-18 Single-part cylinder head for a reciprocating piston internal combustion engine

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144179A2 (en) * 1983-11-25 1985-06-12 Honda Giken Kogyo Kabushiki Kaisha Multiple-valved internal combustion engine
EP0213444A1 (en) * 1985-09-03 1987-03-11 IVECO FIAT S.p.A. Cylinder head for internal combustion engines
DE3604412A1 (en) * 1986-02-12 1987-08-13 Audi Ag Valve device
EP0271950A2 (en) * 1986-12-17 1988-06-22 ALFA LANCIA S.p.A. Head for an internal combustion reciprocating engine
DE3818636A1 (en) * 1988-06-01 1989-12-07 Bayerische Motoren Werke Ag PISTON PISTON INTERNAL COMBUSTION ENGINE WITH A CYLINDER HEAD COMPRISING TWO OVERCOVERED CONTROL SHAFTS
DE3826013A1 (en) * 1988-07-30 1990-02-01 Bayerische Motoren Werke Ag CYLINDER HEAD FOR PISTON PISTON COMBUSTION ENGINES
DE4002964A1 (en) * 1990-02-01 1991-08-08 Audi Ag IC engine cylinder head - has tappet openings of cross=sections comprising curved ends and outwards-arching sides
DE4215051A1 (en) * 1992-05-07 1993-11-11 Audi Ag Bearing for two camshafts in housing - has bearing cover of one slide bearing integral with screw-on bearing seat of second slide bearing to produce graduated dividing plane
EP0688946A1 (en) * 1994-06-16 1995-12-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Cylinder head layout of an internal combustion engine
DE19843258A1 (en) * 1998-09-21 2000-03-23 Volkswagen Ag Installation arrangement of motor vehicle's power plant with internal combustion engine and gearbox has auxiliary shaft plane identical to vehicle's longitudinal centre plane, and crankshaft plane offset to one side
DE19944013B4 (en) * 1998-09-14 2004-12-23 Honda Giken Kogyo K.K. Four-stroke engine
FR2959683A1 (en) * 2010-05-06 2011-11-11 Peugeot Citroen Automobiles Sa Method for eliminating residual chip of machining of bore of housing on direct attack dispensing type cylinder head of motor vehicle, involves forming angular recess in end part of cylindrical sleeve operated at end of machining

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Publication number Priority date Publication date Assignee Title
GB1256401A (en) * 1969-05-22 1971-12-08 Rubery Owen & Co Ltd Improvements in cylinder heads for internal combustion engines
AT329323B (en) * 1972-11-06 1976-05-10 Denzel Kraftfahrzeug Wolfgang CYLINDER HEAD FOR COMBUSTION MACHINERY
DE3009302A1 (en) * 1979-03-23 1980-09-25 Denzel Kraftfahrzeug Wolfgang IC engine four-valve cylinder head - has camshaft bearings on transverse walls detachable from head

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GB1256401A (en) * 1969-05-22 1971-12-08 Rubery Owen & Co Ltd Improvements in cylinder heads for internal combustion engines
AT329323B (en) * 1972-11-06 1976-05-10 Denzel Kraftfahrzeug Wolfgang CYLINDER HEAD FOR COMBUSTION MACHINERY
DE3009302A1 (en) * 1979-03-23 1980-09-25 Denzel Kraftfahrzeug Wolfgang IC engine four-valve cylinder head - has camshaft bearings on transverse walls detachable from head

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144179A2 (en) * 1983-11-25 1985-06-12 Honda Giken Kogyo Kabushiki Kaisha Multiple-valved internal combustion engine
EP0144179A3 (en) * 1983-11-25 1986-05-28 Honda Giken Kogyo Kabushiki Kaisha Multiple-valved internal combustion engine
EP0213444A1 (en) * 1985-09-03 1987-03-11 IVECO FIAT S.p.A. Cylinder head for internal combustion engines
DE3604412A1 (en) * 1986-02-12 1987-08-13 Audi Ag Valve device
EP0271950A2 (en) * 1986-12-17 1988-06-22 ALFA LANCIA S.p.A. Head for an internal combustion reciprocating engine
EP0271950A3 (en) * 1986-12-17 1989-05-10 Alfa Lancia Industriale S.P.A. Head for an internal combustion reciprocating engine
DE3818636A1 (en) * 1988-06-01 1989-12-07 Bayerische Motoren Werke Ag PISTON PISTON INTERNAL COMBUSTION ENGINE WITH A CYLINDER HEAD COMPRISING TWO OVERCOVERED CONTROL SHAFTS
EP0353577A2 (en) * 1988-07-30 1990-02-07 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Cylinder head for an internal-combustion engine
DE3826013A1 (en) * 1988-07-30 1990-02-01 Bayerische Motoren Werke Ag CYLINDER HEAD FOR PISTON PISTON COMBUSTION ENGINES
EP0353577A3 (en) * 1988-07-30 1990-04-04 Bayerische Motoren Werke Aktiengesellschaft Cylinder head for an internal-combustion engine
DE4002964A1 (en) * 1990-02-01 1991-08-08 Audi Ag IC engine cylinder head - has tappet openings of cross=sections comprising curved ends and outwards-arching sides
DE4215051A1 (en) * 1992-05-07 1993-11-11 Audi Ag Bearing for two camshafts in housing - has bearing cover of one slide bearing integral with screw-on bearing seat of second slide bearing to produce graduated dividing plane
EP0688946A1 (en) * 1994-06-16 1995-12-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Cylinder head layout of an internal combustion engine
US5609129A (en) * 1994-06-16 1997-03-11 Dr. Ing. H.C.F. Porsche Ag Cylinder head arrangement of an internal-combustion engine
DE19944013B4 (en) * 1998-09-14 2004-12-23 Honda Giken Kogyo K.K. Four-stroke engine
DE19843258A1 (en) * 1998-09-21 2000-03-23 Volkswagen Ag Installation arrangement of motor vehicle's power plant with internal combustion engine and gearbox has auxiliary shaft plane identical to vehicle's longitudinal centre plane, and crankshaft plane offset to one side
US6910547B1 (en) * 1998-09-21 2005-06-28 Volkswagen Aktiengesellschaft Mounting arrangement of an automobile drive unit having a combustion engine and a transmission
FR2959683A1 (en) * 2010-05-06 2011-11-11 Peugeot Citroen Automobiles Sa Method for eliminating residual chip of machining of bore of housing on direct attack dispensing type cylinder head of motor vehicle, involves forming angular recess in end part of cylindrical sleeve operated at end of machining

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