DE1961804C3 - Cylinder head mounting for reciprocating internal combustion engines - Google Patents

Description

2. Cylinder head attachment according to claim 1, as a spherical disk with a corresponding counter-bearing characterized in that as a counter bearing for transferring. This has the disadvantage that the the bridges (6) on the end cylinders auxiliary supports screw force on the edge or in edge nodes of the cy- (9,10) are provided. linderkopf attacks, whereby, conditioned by

3. cylinder head fastening according to claim i the shape of the joining surface between the cylinder head u id or 2, characterized in that for the transmission of 30 cylinders, a tilting moment results that the Zylioiergung the clamping forces of the bridge 16) on the cylinder head when the fastening lock head is loosened on one side (3, 4) tilts in a manner that is inherently safe. This means that the advantage is one that is facilitated Lige contact surfaces and the surface pressure are developed Intermediate layers (7) are provided. because all screws have to be loosened.

4. Cylinder head attachment according to one of the 35 It is ultimately ice-cold internal combustion mockery 1 to 3, characterized in that the schinl known (German patent specification 940 Θ75 and Bridge support points (17) on the cylinder head Motorentechnische Zeitschrift,?% 8, 'feft 4, p. 132 (3, 4) axially as far as possible from the joining surface to 138), in which the cylinder head fastening by means of (16) removed, for example on the upper cylinder head expansion bolts, some of which are in the gas ducts bottom (21) are arranged. 40 are arranged. This has the disadvantage that the

5. Cylinder head attachment according to one of the screw arrangement and the Kaaalfona ^ aufemander Proverbs 1 to 4, characterized in that the a ^K must be correct, although the Einläokäaai-Bnickfortleitung and distribution of the bridge mainly determined by the shape of the bridge (6 ) introduced clamping forces from the air flowing into the cylinder a bridge support point (17) to the joining surface (16) 45 Dial! granted. On the other hand, the screw is arranged through the walls of the gas exchange ducts (11, 12, located approximately in the height of the cylinder head base-13, 14) or by supporting walls, ribs or ordinances, the height of which is to accommodate the bending stiffening, the latter being mementos with air cooling, Caused by the Schraufaenkräfts, a shape adapted to the cooling air flow with increasing thermal load on the masses. 50 machine is usually not enough. Deformations occur, especially in the area of the exhaust duct *, which may persist depending on the altitude of the teracerature reached

1 lead to deformations. A slackening of the screw

Benkraft and leaks between cylinder head 55 and cylinder are the result.

It is also known ( Swiss patent specification

The invention relates to a cylinder head attachment .251988), in an air-cooled internal combustion engine • supply for a reciprocating internal combustion engine in one. the fastening screws for the cylinder head between or multi-cylinder assemblies with two adjacent cylinder units separated for each cylinder, with adjacent cylinders, however, for. each cylinder head own ^! Belinder heads in a row with their cylinder and the fastening screws. be applied, having leading to the crankcase by means between the cylinder heads consequence that arranged "expansion screws are braced in the region of the fastening screws, each having a cylinder head with a Schraubendie expansion screws via a bridge to the ZY pipe in the area de _a neighboring Zylinderkopiinderköpfe act. 65 fes overlaps and a zabn-shaped parting line arises between two adjacent cylinders in the case of cylinder heads of reciprocating piston combustion engines. These machines occur with increasing thermal and mechanical fastening screws sometimes have a niche load, strength and deformation pro-very large distance from the sealing surface between

Cylinder head and cylinder, which undesirably large the walls of the gas exchange ducts or Bending moments in the areas of the cylinder head ribs and stiffening ^ obeidjeteteteren one

results near the screw pipes. shape adapted to the air flow ^a "^ ⁿ · - -...

Bs Bt is also known (French patent specification. In the drawing, an exemplary embodiment is shown in FIG

934 637), adjacent cylinders shown with a flange S invention. . _s __ """_, _rt " _{5ti d} " _h

at the cylinder base in the middle of the clamping straps on the crank- Fig. 1 shows a to. «» eu ^^ T "- " ⁰ ^

to attach housing. The tensioning straps are made by two cylinder units of a WgPj ^ * "

A screw on the engine that acts in the half-point of the force and in which the two cylinders are in view

the flanges of the cylinders pressed. are shown; . A »™ nii« tMi after

It is the object of the invention to provide the screw fastening Fig. 2 shows the two cylinder units

stigung of the cylinder copy so that this A b b. 1 in view from above;

iEiflß f di L d d ^ h Fig3 Show | ei «n ^ tt

gg yp g

little influence on the lag * and shape de, ^ change- Fig. 3 shows | ^

sel channels and the script beR ^v 'al _i as unified as possible

directly into the joining area ~ -? «ehs -, ylinderkopf Fig. 1; . ^ «« »« Tenten two

in the cylinder. »5 · Fig.4 shows vonondea ^ Fig ^ l da ^ tttütezwei

mL Äsfgtbe ^ frd eriüiuhr ^ mäS thereby zySödercinSeäea the £ ffl "* e" g-jg ^ solves that each expansion screw, known head and cylinder and the position of the Behnscrews, is assigned a separate bridge, which each - and Brückwian flag points. only knows of two adjacent cylinder heads «nnä- Two cylinders 1, 2 with zymu .

shirt is punctiform eiawira and is designed in such a way that the vertical projection of the connection line is located 7 with a Kg of two accessible bridge support points on the ¹ ^ -J ^ h and cylinders to the surface center line of these joining attachments cylinder heads 3, 4 looking at the surface is a chord »5 acts on the outside of the jy ^

As a result, the length of the joint of the ducts is 1,3 and 2 ^ 4 becomes the screw

largely independent of the screw position. on cylinder heads 3, 4 and «« «**« * J ™ 5? Thanks to the high-lying force application point, which is designed as a cooling air cladding,

Bridge is used to transfer the pressure distribution in the cylinder head zea9,10. "". ,. _

räP-.tiger and the contact pressure of the joining surfaces 3 »The advantageous arrangement of the. ^^ örauDens more evenly. In addition, the support points of the bridge in the parting line between two cylinder units are almost perpendicular to the center of gravity of the possible design. for ore <^ «™ ^ Vlertel joint surface between the cylinder head and cylinder noses 11, 12, 13, 14, primarily the inlet port is arranged, which is due to the screw force IS, 13 and the favorable connection 2ύ« fsenrMl ·

initiated bending modulus low wL-d and with one-sided 35 Sen inner surface of the cytodericoFte. L »p> aro-

tigers reading two expansion screws a tilting moment mungsrichnmg the cooling air Bt * ^ / « ^u ® ~ JS ^"

prevents «int It is a broad idea that draws. Here ώα FreKaume 15 for O ^ ui-

Ϊ finding, at dea EndryFhufem as a counter-bearing for the robbers afe. Average cross-sectional area for the

S bridges hip supports are used that are sufficiently large in the case of!

<did machines cool from a local 4? The Rächemaiüeffinie 1§ of the joint surface 16 of the

reinforced cooling air cladding. Cylinder heads and cylinders are roughly in the

Ia a further Ausgestiliung the invention middle between the inner and ^ ff ^^ f

it is proposed that the joint surface 16 transferred from the ß / cke

\ Screw forces over baffled pressure surfaces and the nen.Schraubenkrafte evaluate on the mit.Einι cross

Surface pressure corresponding intermediate layers, the 45 marked bridge contact points "ao [« J

; flat or concave from ^ bfldei and, transferred to the cylinder-cylinder head. The vertical projection

. koof to transfer. Dk ballkren pressure surfaces of the same connection ^ e 19 two ^^ JJ ^ J ™ ^ \ '■ chen Hehendiffe "narrow the bridge deck from currency kenauflagepunkte M .schneiderι the P ^ mtt ^ me rend di" Z vischenlagei, shifts to all 18 of the circular joint flatc: 16 ujidIMdM \ m \ Compensate the sides so that the accuracy of the 50 ° is a chord. Here I have a bathroom

\ Uge ^ Zyander units no special ant "tilts ^ 5?" * 12ίΓΤ2Κ

r'Tb "

^ ra ^ Sd ^ tabtt. Do "eaeicnenr'Tnsbe" Finder 'λώ-Ίί-Ί ^ «» «« Zyiinderko _P - special about the formation of a pressure cone that prevents fes 4, 3. ., "·· ■ n,"

the forces as evenly as possible on the joining surface 55. If the argestetite example Brucenauflagervertiges, to, effect, it is concluded that the points 37 shows the m Jgr | «> |? Μκ> η P ^ rweise in-Äuflogöpunkte dir BrückU on the cylinder ^ erhead within and outside ^ r.flat-center line 18 of the axially inögjicJisl white vÖif the joining surface, joining surface 16 lie, so naturally, approximately on the upper cylinder head base, arranged orders in which all Bruclkenaüeagärpunkte are 17. In order to transfer the compressive forces from the 60 within the surface center line 18, inventions are preferably included in the Er bridge support for the joining surface.

For this! Sheet drawings

Claims (1)

bfcme on which a further increase in the BeIapa. ntanm-. β stung and thus an increase in performance of the Ma- Patent claims: "Set a limit in terms of the material. Bsi Uichtmetallzytmderköpfe air-cooled internal combustion 1. Zyünderkopfbefestigung for Hubkol- 5 Machinea is the Grenzejderjyerfetoffestigkeit benbrennkraftmascbine in one or Mehrzyiie- dtach-dls ά for purpose & ϊ ^ K zsrgiiessrte auderbauart with separate for each cylinder ZY as yet Weher reduced Here, the on-Mnderköpfen, adjacent in the Cylinder heads. Order - the fastening screws and cylinder head of a row with its cylinder and the crank - particularly difficult because the crankshaft forces, the housing are braced between the cylinder heads and the cylinder head with the cylinder and the crank-arranged screw a, with the housing distorting, resulting in strong deformations Expansion screws over a bridge on the Zyfex Jindeik heads act, characterized by the fact that the fastening screws for the are characterized by the fact that each expansion screw (5) has a separate bridge on the cylinder head, depending on the number, all or in part in the known manner. Locally extended parting line is assigned to two cylinder rows (S), each of which acts as a double cylinder head via an adjacent cylinder head (3, 4) approximately at the same time as the cylinder head is designed so that the belgebäuse to brace. The disadvantage here is that the vertical projection of the connecting line (19) Höbenuaterschtede due to the distance tolerances of two adjacent bridge support points (17) between the two cylinder elements are not equal to the annular joining surface (16), which results in high edge pressure cylinder heads (3, 4) and cylinders (1, 2) for the ability and ease of addition to the surface center line (18) of this joining surface (1 *) result in a screw by bending,
It is also got a tendon, the screw forces over