EP3615783A1

EP3615783A1 - Cylinder head housing, method for producing a cylinder head housing, and casting core

Info

Publication number: EP3615783A1
Application number: EP18717361.2A
Authority: EP
Inventors: Paulo Urzua Torres; Michael Henn; Martin Bier; Madlen Rudloff
Original assignee: Volkswagen AG
Current assignee: Volkswagen AG
Priority date: 2017-04-28
Filing date: 2018-04-12
Publication date: 2020-03-04
Anticipated expiration: 2038-04-12
Also published as: WO2018197228A1; CN110582630B; US20200056563A1; EP3615783B1; US11078865B2; DE102017109185A1; CN110582630A

Abstract

The invention relates to a cylinder head housing (30) for an internal combustion engine, which internal combustion engine forms at least two cylinders arranged in-line, the cylinder head housing comprising: receiving openings for one exhaust valve each, which exhaust valves are associated with the individual cylinders of the internal combustion engine; exhaust gas channels (46), which extend from said exhaust-valve receiving openings and which are merged into an exhaust gas outlet channel (50); and cooling channels (52-74, 78, 80), which cooling channels (52-74, 78, 80) comprise a roof distribution channel (52), which is connected to injector cooling channels (56) for arranging above respective cylinders, the injector cooling channels (56) each being connected to a plurality of roof network channels (58), which extend in different radial directions with respect to a longitudinal axis of the particular injector receiving opening and which are connected directly or indirectly to at least two roof collection channels (62), which are arranged on different sides with respect to the line defined by the injector cooling channels (56), and/or comprise a manifold distribution channel (64), which extends along the line of the exhaust-valve receiving openings, the manifold distribution channel (64) being connected to a plurality of manifold network channels (66), which extend along the exhaust gas channels (46) and which are connected directly or indirectly to a manifold collection channel (68), which extends along the line of the exhaust-valve receiving openings.

Description

DESCRIPTION

Cylinder head housing, method for producing a cylinder head housing and

casting core

The invention relates to a cylinder head housing for an internal combustion engine, a method for producing such a cylinder head housing and a casting core for use in such a method. The invention further relates to an internal combustion engine with such a cylinder head housing and a motor vehicle with such an internal combustion engine.

Internal combustion engines are usually cooled by means of a cooling liquid which, conveyed by at least one coolant pump, circulates in a cooling system of the internal combustion engine. The cooling system includes cooling channels, the housing of a cylinder (crank) and a cylinder head housing of an internal combustion engine of the internal combustion engine are formed. By the circulating coolant heat energy from the engine and other components of the internal combustion engine to at least one

Are dissipated ambient heat exchanger, in which the heat energy then to the

Ambient air is discharged.

DE 10 2007 031 350 A1 discloses a multi-part cylinder head housing for a multi-cylinder internal combustion engine of an internal combustion engine, wherein the cylinder head housing for each of the cylinders of the internal combustion engine forms a receiving opening for a spark plug and a total of four receiving openings for two intake and exhaust valves. Furthermore, the cylinder head housing cooling channels, which are provided for a flow by means of a cooling liquid, from, wherein the cooling channels comprise two distribution channels, the both sides of the row of the individual cylinders associated

Receiving openings are arranged and extending in the longitudinal direction of the cylinder head housing. Each of these distribution channels extends a cooling channel, one of which is guided in an annular manner around the associated spark plug receiving opening. Such

Cylinder head housing can be improved in terms of the achievable by means of a flow through the cooling channels cooling effect.

From DE 10 2010 036 392 A1 discloses a cylinder head housing with integrated cooling channels is known, wherein the cooling channels form a cooling jacket, the receiving openings for spark plugs and gas exchange valves, the individual cylinders of the cylinder head housing comprehensive associated with internal combustion engine, largely completely surrounds. A comparable cylinder head housing is further known from EP 1 972 772 A2. Such a cylinder head housing may be distinguished by a comparatively good cooling effect by means of a coolant flowing through the cooling jacket, but is expensive to produce and / or has a structural strength considerably impaired by the comparatively large volume of the cooling jacket.

The invention has for its object to optimize a cooling ducts integrated cylinder head housing for an internal combustion engine with regard to a most advantageous cooling effect with the most compact dimensions possible.

This object is achieved by means of a cylinder head housing according to claim 1. A method for producing such a cylinder head housing is the subject of claim 1 1 and a casting core for use in such a method

Subject of claim 13. Advantageous embodiments of the

Cylinder head housing according to the invention and the casting core according to the invention and preferred embodiments of the method according to the invention are objects of the further claims and / or emerge from the following description of the invention.

According to the invention a preferably integrally formed cylinder head housing for a (reciprocating) internal combustion engine is provided, wherein the internal combustion engine forms at least two cylinders arranged in series. The cylinder head housing comprises for each of the cylinder receiving openings, which are at least for receiving each of an exhaust valve, hereinafter abbreviated as exhaust valve-receiving opening, are provided.

Preferably, also receiving openings for each a fuel injector or a spark plug, which are assigned to the individual cylinders of the internal combustion engine, may be provided. These are referred to below as injector receiving port. The cylinder head housing further comprises exhaust passages (which are integrated into the cylinder head housing) that originate from the exhaust valve intake openings and that are combined in an exhaust gas outlet channel, and (integrated) cooling passages which are provided for throughflow by means of a coolant. Is characterized such a cylinder head housing

According to the invention in that the cooling channels comprise a roof distribution channel, each with one for an arrangement (preferably centrally) above a cylinder

provided, preferably annular (and in particular in each case an injector on receiving opening annularly surrounding) injector cooling channel is fluidly connected, wherein the injector cooling channels each having a plurality of in different radial directions with respect to a longitudinal axis of the respective injector cooling channels (wherein this longitudinal axis preferably the longitudinal axis of the respective injector on close meöffnung and / or the associated cylinder of the internal combustion engine or to this / these extending at least in parallel) extending roof net channels are fluidly connected, which are fluidly connected directly or indirectly with at least two roof collecting channels, which are arranged on different sides with respect to the series defined by the injector cooling channels. The roof net channels can preferably also along the

Longitudinal axis of the respective injector cooling channel extend. Additionally or alternatively, it is provided according to the invention that the cooling channels comprise a manifold distribution channel extending along the row of the outlet valve receiving openings, wherein the

Manifold manifold is fluidly connected to a plurality of along the (all) exhaust ducts extending manifold network passages, which are directly or indirectly fluidly connected to a manifold manifold, which extends along the row of Auslaßventil- receiving openings.

An inventive cylinder head housing is characterized, inter alia, by a relatively large number of relatively small-sized cooling channels (in particular the roof and manifold network channels), whereby the (wall) surface that comes into contact with a provided for the flow of the cooling channels coolant , can be significantly increased compared to conventional cylinder head housings. As a result, a correspondingly high heat transfer from the cylinder head housing to the coolant can be achieved. Furthermore, this makes it possible to circulate an overall reduced volume flow of the coolant through the cooling channels, without thereby reducing the cooling capacity. A reduced volumetric flow of the coolant can thus lead to a reduced delivery rate for a working machine (pump in the preferred use of a cooling liquid or compressor with a likewise conceivable use of a cooling gas as coolant), which has a positive effect on both the costs and also can affect the weight of the machine and thus a comprehensive such a machine engine combustion engine. The same applies to a such an internal combustion engine comprehensive engine. If, as usual, in such an internal combustion engine or in such an internal combustion engine provided for the promotion of the coolant working machine is driven directly by the internal combustion engine, the achievable according to the invention reduced delivery rate to a reduction of

Fuel consumption of the internal combustion engine lead. The inventively achievable relatively low flow rate of the coolant can also be beneficial to the weight and the Impact dimensions of a cylinder head housing according to the invention. This is true not only because of a correspondingly reduced weight of the coolant, which is particularly relevant in the preferred use of a coolant, but also because of compared to a conventional cylinder head housing whose cooling jacket not

According to the invention is divided into a plurality of relatively small-sized cooling channels, improved structural strength / rigidity, which adjusts due to the overall smaller cooling channel volume and the stabilizing acting "partitions" formed between the individual cooling channels.

An internal combustion engine according to the invention is characterized in that it comprises a cylinder head housing according to the invention. The cylinder head housing is included

Component of a cylinder head of the internal combustion engine, in which case at least corresponding to the receiving openings formed by the cylinder head housing

Functional components (fuel injectors, spark plugs and exhaust valves, continue

Intake valves and optionally one or more camshafts and others

Function components) are included. Due to the design of a

The internal combustion engine according to the invention as a reciprocating internal combustion engine further comprises at least one cylinder housing with the cylinders formed therein and in each case a piston movably arranged in the cylinders.

Preferably, it may be provided that a cylinder head housing according to the invention is integrated in such a cooling system of an internal combustion engine according to the invention that a coolant flowing through the cooling system first flows through the roof distribution channel and only later the roof collecting ducts. But possible is also a reverse

The direction of flow. The same applies to the flow through the manifold distribution channel compared to the manifold manifold. Can be advantageous if the under

Consideration of an intended operational orientation of an inventive

Cylinder head or a comprehensive this internal combustion engine lower cooling channels are flowed through in front of the higher-lying cooling channels to improve a discharge of gas bubbles in a coolant used as coolant.

In order to optimally utilize the advantage that can be achieved by this embodiment of a cylinder housing according to the invention, it should preferably be provided that the

Flow cross sections of the cooling channels are formed as small as possible. In particular, it may be provided that the mean (i.e., averaged over their longitudinal profiles)

Flow cross section of the (all) roof network channels (each) smaller than, in particular less than half the size of the central flow area of both the roof manifold, the injector cooling channels, and the roof manifolds. It can also be provided that the smallest flow cross section of the (all) roof net channels (in each case) is smaller than the smallest flow cross section of both the roof distribution channel, the injector cooling channels and the roof collecting channels. With regard to the manifold network channels, it can be provided in a corresponding manner that the average (ie, averaged over their longitudinal profiles)

Flow cross-section of the manifold network channels is smaller than the average flow cross-section of both the manifold distribution channel and the manifold manifold and / or the smallest flow area of the manifold network channels smaller than the smallest

Flow cross-section of both the manifold distribution channel and the manifold manifold is.

Too small dimensioning of the flow cross sections of the cooling channels should be avoided at the same time, however, because this can have a negative effect on increasing the flow resistance for the coolant, whereby at least the achievable advantage of a comparatively low flow rate for the coolant could be compensated or overcompensated. Preferably, therefore, it should be provided that the (smallest)

Flow cross section of the cooling channels and in particular that of the roof network ducts and / or the manifold network ducts> 1 mm ² . Particularly preferably, this can be between 2 mm ² and 100 mm ² , in particular between 4 mm ² and 25 mm ² .

A production of a cylinder head housing according to the invention, but at least of the cooling channels comprehensive portion thereof, can advantageously by means of a

generative manufacturing process or by casting using at least the cooling channels forming, lost (ie not reusable) core done, because these manufacturing methods advantageously the integration of at least partially completely closed and thus not accessible from the outside and relatively small sized cavities in one allow to be produced cylinder head housing.

In such a production of a cylinder head housing according to the invention or at least of the cooling channels comprising portion thereof by casting using a lost core may preferably be provided that for the lost core, a soluble and especially water-soluble base material, such as a salt, is used, because characterized relative to a simple manner, a substantially complete rinsing of the base material after the production of the cylinder head housing at least from than

Cooling channels provided cavities is possible. This is especially true in comparison to a non-soluble base material, such as sand, for pouring

Metal structures is used regularly and although it is rinsable, but it does not dissolve in the rinse liquid.

A casting core according to the invention, which is intended for use in a method according to the invention for producing a cylinder housing according to the invention

Gießkernabschnitte, as a negative form of the cooling channels of an inventive

Cylinder housing are formed. A production of such a casting core according to the invention can advantageously take place by means of casting, for which purpose advantageously a use of a sand mold can be provided. This applies in particular if a use of a soluble base material and in particular of a salt as a base material is provided for the design of the casting core.

To stabilize a casting core according to the invention, which is characterized by relatively many and im

Cross section relatively small and at the same time long sized Gießkernabschnitte and thus may be characterized by a relatively sensitive structure, structural

Measures be provided. For example, a support structure, e.g. metal wires, may be integrated into the casting core, which support structure may remain in a cylinder head housing formed using such a casting core, i. is integrated into this.

An inventive cylinder head housing can be in terms of achieving a most advantageous cooling effect, in particular by a possible advantageous

Arrangement or a possible advantageous course of the cooling channels is achieved by optimizing various measures.

For this purpose, it can be provided, in particular, that the roof net channels emerging from the individual injector cooling passages merge into one or more roof ring passages, which at least partially surround the longitudinal axis of the respective injector cooling duct and open into the roof collecting ducts. As a result, it is possible, in particular, to achieve as advantageous cooling as possible for the combustion chamber roofs of an internal combustion engine according to the invention that are bounded by the cylinder head housing.

It can also be provided that the manifold network ducts are fluid-conductively connected at least partially to one or more manifold ring passages which are at least partially and preferably completely encircling one or more, preferably all, of the exhaust passages are in turn fluidly connected to the manifold manifold. In particular, the manifold annular passages may be arranged as close as possible to the transitions between the cylinders and the exhaust passages and consequently in the vicinity of valve seats provided for the exhaust valves, whereby in particular an advantageous cooling for these valve seats and the exhaust valves cooperating therewith can be realized.

Furthermore, it can be provided that the manifold manifold and the manifold manifold on different sides with respect to a through the exhaust channels

trained row are arranged. In this way, in particular a possible advantageous cooling for the integrating the exhaust ducts section of an inventive

Cylinder head housing can be realized.

Advantageously, it can also be provided that a longitudinal axial end of the roof distribution channel merges into a roof inlet or outlet channel and / or in each case one

longitudinal axial end of the roof collecting ducts merges into a roof discharge or inflow channel. As a result, an advantageous position of the roof inflow channel (s) and / or of the roof outflow channel (s), the connection (s) of the other (roof) cooling ducts of the cylinder head housing with other cooling ducts and / or coolant lines of one The internal combustion engine according to the invention and / or an inventive

Serving internal combustion engine can be achieved.

The same purpose may serve if, as is preferably provided, in an adjacent to the exhaust gas outlet passage portion of the manifold manifold a manifold inflow passage merges into the manifold manifold and / or in one of the

Abgasauslasskanal adjacent portion of the manifold manifold a manifold Abströmkanal from the manifold collection channel off. Insofar as both for a manifold inflow channel and for a manifold outflow channel such integration into the

Cylinder head housing is provided may further preferably be provided that they are arranged opposite to each other with respect to the exhaust gas outlet on different sides and in particular radially (with respect to a longitudinal axis of the exhaust gas outlet).

A further improvement of a cylinder head housing according to the invention with regard to the cooling effect achievable for this can be realized by means of an exhaust gas outlet cooling channel which connects (directly) and preferably completely circumscribes around the exhaust gas outlet duct and the exhaust gas outlet duct. Furthermore, it may be provided that the roof distribution channel and / or the roof collecting ducts and / or the manifold distribution channel and / or the manifold collecting duct (respectively) along the entire row of exhaust ducts / receiving openings is / are, which in turn can be advantageous in terms of achieving the best possible cooling effect for the cylinder head housing or for the cylinder head of an internal combustion engine according to the invention ..

The invention also relates to a motor vehicle, in particular a wheel-based motor vehicle (preferably a car or truck), with an internal combustion engine according to the invention. In this case, the internal combustion engine can be provided in particular for (direct or indirect) provision of the drive power for the motor vehicle.

The indefinite articles ("one", "one", "one" and "one"), in particular in the

Claims and in the claims generally explaining the description are to be understood as such and not as numerical words. Correspondingly thus concretized

Components are thus to be understood that they are present at least once and may be present more than once.

The present invention will be explained in more detail with reference to exemplary embodiments illustrated in the drawings. In the drawings shows, partly in a simplified representation:

Fig. 1: a motor vehicle according to the invention;

2 shows an internal combustion engine according to the invention;

FIG. 3 shows the internal combustion engine of the internal combustion engine according to FIG. 2 in a simplified representation; FIG.

Fig. 4: an inventive cylinder head housing for example a

Internal combustion engine according to FIG 3 in a first view.

FIG. 5 shows the cylinder head housing according to FIG. 4 in a second view; FIG.

Fig. 6: a for forming roof cooling channels of the cylinder head housing according to FIGS. 5 and 6 provided casting core and FIG. 7 shows a casting core intended for forming manifold cooling passages of the cylinder head housing according to FIGS. 5 and 6.

Fig. 1 shows a motor vehicle according to the invention with an internal combustion engine 10, which is shown in more detail in FIGS. 2 and 3.

The internal combustion engine 10 comprises a supercharged by means of a compressor

Internal combustion engine 12, the drive power during operation of the

Motor vehicle can provide. The compressor is part of an exhaust gas turbocharger (not visible). The internal combustion engine 12 is formed in the present embodiment, as shown in FIG. 3 as a four-cylinder (series) reciprocating engine and can be operated, for example, according to the gasoline or diesel principle. For this purpose, 18 cylinders 20 are formed in a cylinder crankcase, in which pistons 22 are arranged longitudinal axial movable. A movement of the pistons 22 caused by combustion processes is transmitted via connecting rods 24 to a crankshaft 26 rotatably mounted in the cylinder crankcase 18. This rotation of the crankshaft 26 can be transmitted to driven wheels of a motor vehicle according to FIG. 1. The internal combustion engine 12 or the comprehensive this

Internal combustion engine 10 can thus be used to generate the traction drive power for the

Serve motor vehicle.

A rotation of the crankshaft 26 is also transmitted by means of a timing gear 28, for example in the form of a toothed belt or chain drive, to a first camshaft 32 rotatably mounted in a cylinder head housing 30 of the internal combustion engine 12. By means of, for example, a gear transmission 36 (with a ratio of one), a rotational movement of the first camshaft 32 is transmitted to a second camshaft (not visible). The second camshaft may be an intake camshaft of the internal combustion engine 12, by means of which intake valves (two per cylinder 20 each) are actuated via the fresh gas into combustion chambers bounded by the cylinders 20, the piston 22 and the cylinder head housing 30, can be introduced controlled. In this case, this fresh gas is burned with fuel injected directly into the combustion chambers in order to effect the movement of the pistons 22 within the cylinders 20, which is guided by the rotation of the crankshaft 26. By contrast, the first camshaft 32 can be an exhaust camshaft, by means of which exhaust valves 34 (in each case two cylinders 20) are actuated, via which exhaust gas, which was produced in a combustion of fuel fresh gas mixtures in the combustion chambers, is removed in a controlled manner can be. By means of a fuel pump fuel injectors 38 of the internal combustion engine 12 fuel from a fuel tank (not shown) of the internal combustion engine 10 is supplied. By means of the fuel injectors 38, the fuel is metered into the combustion chambers under relatively high pressure and at predetermined times. In one embodiment of the internal combustion engine 12 as a diesel engine, the fuel injectors 38 assigned to the individual combustion chambers can be arranged approximately centrally between the respectively associated gas exchange valves (intake valves and exhaust valves 34). In an embodiment of the internal combustion engine 12 as a gasoline engine, however, can be provided that at this point a spark plug is arranged. In this case and in the case of a directly injecting embodiment of the gasoline engine, an alternative arrangement with regard to the combustion chambers can then be selected for the integration of fuel injectors. For receiving the fuel injectors 38 and / or the spark plugs and for receiving the gas exchange valves, the cylinder head housing 30 receiving openings (not shown in detail) on.

The internal combustion engine 10 further comprises a cooling system with at least two cooling circuits, wherein the cooling system of the cooling of individual components of the internal combustion engine 10, including the internal combustion engine 12, an engine oil cooler (not shown) and a charge air cooler 14, and possibly also other components of the

Internal combustion engine 10 integrating motor vehicle, e.g. a transmission oil cooler (not shown), is used. In the cooling system, due to operation of the fuel pump, a cooling liquid circulates, absorbing heat energy from the components to be cooled. This heat energy is in a main cooler 16 and optionally temporarily in one

Heating heat exchanger (not shown) cooled by a heat transfer to ambient air, so that it can be recirculated to the components to be cooled again. In the main cooler 16, a heat transfer from the cooling liquid takes place on the

Ambient air exclusively with the aim of cooling the cooling liquid. One

Heat transfer in the heating heat exchanger would, however, primarily with the aim of tempering ambient air, which is then to be supplied to an interior of the motor vehicle, take place.

For cooling the internal combustion engine 12, both the cylinder crankcase 18 and the cylinder head housing 30 each form a cooling channel system 42, through which the cooling liquid can be passed. 3, such that the cooling liquid conveyed by a coolant pump 40 (see FIG. 2) of the internal combustion engine first of all encloses the cooling channel system 42 of the cylinder head housing 30 flows through before it flows into the cooling channel system 42 of the cylinder crankcase 18.

The specific configuration of the cooling channel system 42 formed in a (inventive) cylinder head housing 30 of an internal combustion engine 12 according to FIGS. 2 and 3 is shown in FIGS. 4 and 5. In this case, the cylinder head housing 30 itself is only shown greatly simplified, while the relevant for the understanding of the invention cavities formed by the cylinder head housing 30 are shown in detail.

Accordingly, the cylinder head housing 30 forms for each of the combustion chambers or cylinders 20 of the cylinder crankcase 18 two fresh gas channels 44, the mouths in the combustion chambers, if necessary, can be closed or released by means of one inlet valve, wherein the two each associated with a combustion chamber fresh gas channels 44 in an initial section still integrally, ie as a single channel. These integrally formed start portions immediately adjoin an intake manifold, which is a portion of a fresh gas train of the internal combustion engine.

The cylinder head housing 30 furthermore forms two exhaust gas channels 46 for each of the combustion chambers, wherein the transitions of the exhaust gas channels 46 into the combustion chambers can be closed or released as required by means of an outlet valve 34. The exhaust ducts 46, which are guided separately in a first section, extend approximately in the longitudinal direction of the

Cylinder head housing 30 extending collecting portion 48 via, from the approximately centrally with respect to the longitudinal direction of the cylinder head housing 30, an exhaust gas outlet channel 50 goes off.

The cooling channel system 42 of the cylinder head housing 30 comprises a roof distribution channel 52 which, slightly offset from the center, is arranged above the combustion chambers and extending in the longitudinal direction of the cylinder head housing 30. In this case, a (longitudinally axial) end of the roof distribution channel 52 passes into a roof inflow channel 54, via which the roof distribution channel 52, the cooling liquid can be supplied. The other (longitudinal axis) end of the roof distribution channel 52, however, formed closed or this ends up as a "dead end" within the cylinder head housing 30th

From the roof manifold 52 there are four injector cooling channels 56 each of which receives one of the injector receiving openings, i. a receiving opening in which either a

Fuel injector 38 or a spark plug is arranged, annularly surrounds. From each of the injector cooling channels 56 are each a plurality of in

different radial directions with respect to the longitudinal axes of the Injektor- receiving openings and also along these longitudinal axes (in the direction of increasing proximity to the combustion chambers) extending roof net channels 58, which are relatively small in terms of their flow cross-sections and each, i. for all of the outgoing from one of the injector cooling channels 56 roof net channels 58, in a fully annular over the respective injector receiving opening encircling roof annular channel 60 pass.

The four roof-ring channels 60 in turn merge into three roof-collecting channels 62, two of which are arranged on one side and the third on the other side with respect to the row defined by the Injektor- receiving openings and which are also along the longitudinal direction of the cylinder head housing 30 and thus extend approximately parallel to the roof distribution channel 52. In each case one of the (longitudinal axial) ends of the roof collecting ducts 62, which in each case merges into a roof outflow channel 74, the cooling liquid therein can be removed. The two roof collecting ducts 62 arranged on the same side with respect to the row defined by the injector receiving openings thereby pass into a common roof outflow duct 74. Those longitudinal axial ends of the roof collecting channels 62, which do not merge into a roof outflow channel 74, in turn end in the cylinder head housing 30th

The cooling channel system 42 of the cylinder head housing 30 further comprises a relatively large-scale manifold manifold 64 which extends along the row of

Exhaust valve receiving openings and therefore primarily in the longitudinal direction of the

Cylinder head housing 30 extends, wherein from the manifold manifold 64 each a manifold ring channel 80 per separate exhaust passage 46 goes off, the manifold ring channels 80 are arranged as close to the cylinders 20 relative to the proximal ends of the exhaust ports 46 and thereby to the respective Flue gas passages 46 completely around (see also Fig. 7). The manifold annular passages 80 of the two exhaust passages 46 each assigned to a cylinder 20 merge into each other in the region of one circumferential section in each case. From each of the manifold ring channels 80 a plurality of extending along the separately guided exhaust ducts 46 manifold net channels 66 from which are also relatively small dimensions and which go directly into a manifold manifold 68, which is also along the row of Auslaßventil- Receiving openings and thus extends primarily in the longitudinal direction of the cylinder head housing 30. Furthermore, additional manifold network channels 66 are provided, which, with an arcuate course, the manifold distribution channel 64 directly connect to the manifold collecting duct 68 and thereby partially revolve around the collecting section 48 of the exhaust ducts 46 on the side of the collecting section 48 facing away from the outlet valve receiving openings.

Approximately in the middle and thus in a section adjacent to the exhaust gas outlet channel 50, a manifold inflow channel 70 opens into the manifold manifold 64. Coolant can be supplied to the manifold manifold 64 via the manifold inflow channel 70. This coolant then disperses in the manifold manifold 64 and then flows into the plurality of manifold runners 66. Coolant, which has flowed through the manifold network channels 66, collects in the manifold collecting channel 68 and can from this via a likewise approximately centrally and thus in an adjacent to the Abgasauslasskanal 50 section outgoing from the manifold collecting duct 68 manifold outflow channel 72nd be dissipated.

The cooling channel system 42 of the cylinder head housing 30 further comprises an annular exhaust gas outlet cooling channel 78, which in the region of the manifold inlet channel 70 and the manifold Abströmkanals 72 connects the manifold manifold 64 and the manifold collecting channel 68 with each other and thereby annularly around the exhaust gas outlet channel 50.

The design of the roof cooling channels (52, 54, 56, 58, 60, 62 and 74) on the one hand and the manifold cooling channels (64, 66, 68, 70, 72, 78 and 80) on the other hand, each with a

Inflow channel (54; 70) and in each case at least one outflow channel (74; 72) enables them to be integrated in parallel into a cooling circuit of a cooling system of an internal combustion engine according to, for example, FIG. 2, so that cooling fluid flowing through this cooling circuit within the cycle of a cycle either through the roof cooling passages (52, 54, 56, 58, 60, 62 and 74) or the manifold cooling passages (64, 66, 68, 70, 72, 78 and 80). Alternatively, however, it is also possible, the roof cooling ducts (52, 54, 56, 58, 60, 62 and 74) and the manifold cooling channels (64, 66, 68, 70, 72, 78 and 80) in series in the Integrate cooling circuit so that the coolant flows through first the roof cooling channels (52, 54, 56, 58, 60, 62 and 74) or the manifold cooling passages (64, 66, 68, 70, 72, 78 and 80) and only then through the other cooling channels (52 - 74, 78, 80) is performed.

6 and 7 show two casting cores 76, which can be produced in the context of a method for producing a cylinder head housing 30 according to FIGS. 4 and 5 by means of casting, for example, a light metal alloy. In this case, two separate casting cores 76 are shown, which, however, also connected or formed integrally with each other could be. In particular, the casting cores can also be connected or integrally formed with further casting cores, which serve to form the remaining opening and cavities (in particular injector receiving openings, outlet valve receiving openings, etc.). 6 and 7 are those Gießkernabschnitte that result in the production of a corresponding cylinder head housing 30 to form the individual cooling channels (52 - 74, 78, 80), with the same reference numerals for these cooling channels (52 - 74, 78, 80) are used, but in each case supplemented by the letter a, marked.

, _c

- lo-

LIST OF REFERENCE NUMBERS

Internal combustion engine

internal combustion engine

Intercooler

main cooler

cylinder crankcase

cylinder

piston

pleuel

crankshaft

Timing

Cylinder head housing

first camshaft

outlet valve

gear transmission

fuel injector

Coolant pump

Cooling duct system

Fresh gas channel

exhaust duct

Collection section of the exhaust ducts

exhaust gas discharge

Roof distribution channel

a Gießkernabschnitt to form the roof distribution channel

Roof inflow

a Gießkernabschnitt to form the roof inflow channel

Injector cooling channel

a Gießkernabschnitt to form an injector cooling duct

Roof-network channel

a Gießkernabschnitt to form a roof net channel

Roof annular channel

a Gießkernabschnitt to form a roof-annular channel

Roof collecting duct

a Gießkernabschnitt to form a roof collecting channel Manifold distribution channel

a Gießkernabschnitt to form the manifold distribution channel

Manifold channel network

a Gießkernabschnitt to form a manifold network channel

Manifold collection channel

a Gießkernabschnitt to form the manifold collection channel

Manifold inlet channel

a Gießkernabschnitt to form the manifold inflow channel

Manifold outflow channel

a Gießkernabschnitt to form the manifold-Abströmkanals

Roof outflow channel

a Gießkernabschnitt to form a roof outflow channel

casting core

Abgasauslasskühlkanal

a Gießkernabschnitt to form the Abgasauslasskühlkanals

Manifold annular channel

a Gießkernabschnitt to form a manifold ring channel

Claims

P AT E N TA N S P R O C H E

1 . A cylinder head housing (30) for an internal combustion engine (12) forming at least two cylinders (20) arranged in series with intake openings for one exhaust valve (34) associated with the individual cylinders (20) of the internal combustion engine (12) exhaust ducts (46) extending from these exhaust valve receiving openings and merging into an exhaust gas outlet duct (50) and cooling ducts (52-74, 78, 80), characterized in that the cooling ducts (52-74, 78, 80)

- Include a roof-distribution channel (52), which is connected to a respective one for an arrangement above a cylinder injector-cooling channel (56), wherein the injector-cooling channels (56) each having a plurality of in different radial directions with respect to a Longitudinal axis of the respective injector cooling channel (56) extending roof net channels (58) are connected, which are directly or indirectly connected to at least two roof collecting channels (62) on different sides with respect to the injector cooling channels (56) defined Row are arranged and / or

- Include a manifold distribution channel (64) extending along the row of

Exhaust valve receiving openings extend, wherein the manifold distribution channel (64) is directly or indirectly connected to a plurality of manifold network passages (66) extending along the exhaust passages (46), which are directly or indirectly connected to a manifold collecting duct (68) extending along the row of exhaust valve receiving openings.

2. Cylinder head housing (30) according to claim 1, characterized by

Receiving openings for each of a fuel injector (38) or a spark plug, which are associated with the individual cylinders (20) of the internal combustion engine (12), wherein the injector cooling channels (56) annularly surround these injector receiving openings.

3. Cylinder head housing (30) according to claim 1 or 2, characterized in that

- The average flow cross section of the roof net channels (58) is smaller than the average flow cross section of both the roof distribution channel (52), the injector cooling channels (56) and the roof collecting ducts (62) and / or the smallest

Flow cross-section of roof net channels (58) smaller than the smallest Flow cross-section of both the roof distribution channel (52), the injector cooling channels (56) and the roof collecting ducts (62) and / or

- The mean flow cross-section of the manifold network channels (66) smaller than the average flow cross-section of both the manifold manifold (64) and the

Manifold collection channel (68) is and / or smallest flow cross-section of

Manifold network passages (66) are smaller than the smallest flow area of both the manifold manifold (64) and the manifold manifold (68).

Cylinder head housing (30) according to one of the preceding claims, characterized in that the outgoing from the individual injector cooling channels (56) roof net channels (58) in one or more around the longitudinal axis of the respective injector cooling channel (56) at least partially encircling roof Transition ring channels (60), which open into the roof collecting ducts (62).

Cylinder head housing (30) according to one of the preceding claims, characterized in that the manifold network channels (66) are at least partially connected to one or more around one or more of the exhaust channels (46) at least partially encircling manifold annular channels (80) which with the manifold distribution channel (64) are connected.

A cylinder head housing (30) according to any one of the preceding claims, characterized in that the manifold manifold (64) and the manifold manifold (68) are disposed on different sides with respect to one another through the exhaust passages (46).

trained row are arranged.

Cylinder head housing (30) according to one of the preceding claims, characterized in that a longitudinal axial end of the roof distribution channel (52) merges into a roof inlet or outlet channel (54) and / or in each case a longitudinal axial end of the roof collecting ducts (62). in a roof discharge or inflow channel (74) passes.

Cylinder head housing (30) according to one of the preceding claims, characterized in that in a section of the manifold distribution channel (64) adjoining the exhaust gas outlet channel (50), a manifold inflow channel (70) merges into the manifold distribution channel (64) and / or a manifold outflow channel (72) from the

Manifold collection channel (68) goes off.

9. Cylinder head housing (30) according to any one of the preceding claims, characterized by a manifold connecting the manifold (64) and the manifold collecting duct (68) and the exhaust gas outlet channel (50) surrounding the exhaust gas outlet cooling channel (78).

10. Cylinder head housing (30) according to one of the preceding claims, characterized

in that the roof distribution channel (52) and / or the roof collecting ducts (62) and / or the manifold distribution channel (64) and / or the manifold collecting duct (68) are guided along the entire row of the exhaust ducts (46) is / are.

1 1. Method for producing a cylinder head housing (30) according to one of the

preceding claims, characterized by the formation by means of a generative manufacturing process or by casting using a lost casting core (76) forming at least the cooling channels.

12. The method according to claim 1 1, characterized by the use of a soluble base material for the casting core (76).

13. casting core (76) for use in a method according to claim 1 1 or 12,

characterized by Gießkernabschnitte (52a - 74a, 78a), which are formed as a negative mold of the cooling channels (52 - 74, 78) of a cylinder housing (30) according to one of claims 1 to 8.