DE102014213257B4 - Cylinder head for internal combustion engine - Google Patents

Abstract

Cylinder head (10) for an internal combustion engine with at least two injectors (20, 22, 24, 26) for injecting fuel, a fuel line running through a channel (30) in the cylinder head (10) for conducting fuel to/from the injectors ( 20, 22, 24, 26), characterized in that the fuel line has at least three separate tubular elements (40, 42, 44, 46, 48), the tubular elements (40, 42, 44, 46, 48) having an input - tubular element (40), an output tubular element (48) and at least one intermediate tubular element (42, 44, 46), wherein intermediate tubular elements (42, 44, 46) each have two adjacent injectors (20, 22, 24, 26) connect to each other, and the channel (30) is intersected at mutually spaced positions in each case by an injector receiving space in the cylinder head (10) running perpendicularly thereto, with each of the injectors (20, 22, 24, 26) on one side having a Feed area (21, 25) and on the other side a discharge area ch (23), and a pipe element (40, 42, 44, 46) each for supplying fuel to the respective injector (20, 22, 24, 26) sealingly on the supply area (21, 25) of the respective injector (20 , 22, 24, 26), wherein a tubular element (42, 44, 46, 48) in each case for passing on fuel from the respective injector (20, 22, 24, 26) sealingly on the discharge area (23) of the respective injector ( 20, 22, 24, 26), the intermediate tubular elements (42, 44, 46) being longer than the channel sections of the channel (30) extending between the individual injector receiving spaces, so that the intermediate tubular elements (42 , 44, 46) protrude at least partially into the injector receiving spaces.

Description

The invention relates to a cylinder head for an internal combustion engine of a motor vehicle. The cylinder head has at least one injector for injecting fuel and a fuel line running through a channel in the cylinder head for supplying the injector with fuel and/or for conveying fuel from the injector.

In a modern diesel internal combustion engine, an injection pressure of, for example, 1800 to 3000 bar or more is required for the injection. This requirement poses particular challenges for the supply lines and connections for supplying the fuel to the individual injectors.

The injectors are usually located in the cylinder head and are bolted to a common rail using high-pressure lines. This rail is intended to compensate for pressure waves and ensure that the fuel is distributed to the individual injectors. The screw connections are adapted to the high pressures.

Such a conventional cylinder head is in 6 shown. The fuel is already under high pressure in the common high-pressure rail 110 , the fuel being supplied to the high-pressure rail 110 via a high-pressure pump 140 . Starting from the high-pressure rail 110, the fuel is distributed to the individual injectors via high-pressure supply lines 120. The residual fuel is discharged via leakage lines 130.

The disadvantage here is the complex wiring. An additional leakage line 130 from injector to injector is also required in each case. Furthermore, the injectors must protrude from the cylinder head so far that the connections are individually accessible from the outside. Overall, there is a considerable package effort and the risk of leaks at the high-pressure screw connections.

From the pamphlet DE 31 28 523 A1 describes the lateral delivery of fuel to an injector through a tube running in a port of the cylinder head. However, leakage discharge is problematic with this fuel supply. In the case of multiple injectors, this fuel supply is also very complex.

From the pamphlet DE 102 60 837 A1 the lateral supply and lateral discharge of fuel to/from the individual injectors is known. For this purpose, a transfer pipe leads through the cylinder head, the transfer pipe having injector passage openings in a side wall, through which the injectors are inserted. However, due to the sealing by means of two O-rings, this fuel supply device is only suitable for low-pressure fuel supply, but not for high-pressure fuel supply. In this case, providing a satisfactory seal between the transfer pipe and the injectors is problematic, particularly at higher fuel pressures.

The publications are supplemented DD 214 894 A1 , DE 10 2006 040 248 A1 , EP 1 063 420 A2 , DE 11 2007 002 492 T5 and WO 02/29238 A1 named, which also belong to the prior art.

In view of the problems described, it is the object of the present invention to provide a compact and low-maintenance cylinder head with which the fuel can be supplied to the individual injectors under high fuel pressure and which can be used without the risk of leaks.

According to the invention, this object is achieved by a cylinder head for an internal combustion engine of the above type having the features characterized in claim 1. Advantageous configurations of the invention are described in the further claims. Claim 8 describes a method for producing a cylinder head according to the features of claim 1.

The starting point is a cylinder head for an internal combustion engine with at least two injectors for injecting fuel, with a fuel line being arranged through a channel running in the cylinder head for conducting fuel to/from the injectors.

It is envisaged that the fuel line has at least three separate pipe elements, the pipe elements comprising an inlet pipe element, an outlet pipe element and at least one intermediate pipe element, with intermediate pipe elements connecting two adjacent injectors to one another, and the channel at distances from one another Positions are each cut by an injector receiving space in the cylinder head running perpendicularly thereto, each of the injectors having a feed area on one side and a discharge area on the other side, and a pipe element for feeding fuel to the respective injector sealingly on the feed area of the respective injector, wherein a pipe element rests sealingly on the discharge area of the respective injector for passing on fuel from the respective injector, wherein the intermediate pipe elements are longer than the Ka extending between the individual injector receiving spaces nalabschnitte of the channel are formed so that the intermediate tube elements protrude at least partially into the injector receiving spaces.

The method for manufacturing a cylinder head according to any one of the preceding claims, in which injectors are inserted into injector accommodating spaces, is characterized in that an input tubular element is inserted into the channel and a first injector into the injector accommodating space, so that the input - The tubular element on one side of the first injector rests against a fuel supply area of the first injector, and then at least one intermediate tubular element is inserted into the channel and at least one further injector is inserted, so that the intermediate tubular element on the one hand is attached to the discharge area of the one adjacent injector and on the other hand at the feed area of the further injector, and then an output pipe element is inserted into the channel, so that pipe elements are arranged between the adjacent injectors and at the beginning and end of the channel, with the pipe elements then sealingly on the at least two Injectors created we rden and by exerting pressure from the outside on the inlet pipe element and / or the outlet pipe element, all arranged pipe elements are pressed sealingly against the injectors resting on the pipe elements.

In other words, the fuel line arranged in the passage is different from the reference DE 102 60 837 A1 not as a transfer pipe provided with holes, but as a plurality of separate pipe elements which, starting from mutually opposite injector sides, can be placed sealingly against the injector, in particular can be pressed against the injector. In the supply area, on which a first tubular element as an input tubular element, which can be supplied with fuel via a high-pressure pump, bears in a sealing manner, the injector has a fuel channel for forwarding the supplied fuel to an injection nozzle or a rail volume arranged therein and/or for forwarding of the supplied fuel to the discharge area. The feed area is therefore preferably in fluid connection with the discharge area, so that the fuel that is fed can be passed on via the discharge area into the further tubular element sealingly abutting thereon. In this case, the fuel flows under high pressure via the first tubular element through the injector and on into the further tubular element, from where it can be fed to a leakage space and/or a further injector.

The invention is based on the finding that a much higher level of tightness can be achieved by means of two separate pipe elements that are placed on the injector in a laterally sealing manner than in the case of fuel supply lines known from the prior art.

Furthermore, no additional high-pressure lines and/or high-pressure screw connections are required, by means of which the injector is to be connected to a common high-pressure rail, since the fuel can be supplied to the injector directly from the high-pressure pump without an interposed common high-pressure rail via the first tubular element, the input tubular element. This eliminates leakage problems and minimizes the need for maintenance.

The cylinder head has at least one additional injector, with the additional tubular element, which is also referred to as the intermediate tubular element, running in the channel between the first injector and the additional injector and sealingly resting against a supply area of the second injector, in particular being pressed against it. In other words, the second injector is connected in series behind the first injector and is supplied with fuel in series via the further tubular element. In this case, the fuel flows under high pressure via the first tubular element through the first injector and further via the further tubular element into the second injector. The first injector and the second injector are thus connected in series and not via a common high-pressure rail with separate high-pressure lines to the high-pressure pump. The pressing of the first end of the second tubular element in its longitudinal direction against the discharge area of the first injector and the other end of the second tubular element against the supply area of the second injector ensures a particularly high level of tightness with minimal line expenditure due to the direct connection between the first and second injector.

With a view to a particularly compact design of the cylinder head, two or more injectors are provided, each cutting transversely, in particular vertically, between which pipe elements for conducting fuel run in the channel, which enable fuel to be supplied to the injectors in sequence. The pipe elements each run from the discharge area of an injector, against which they bear in a sealing manner, to the feed area of the next injector in the row, against which they bear in a sealing manner. The described direct serial connection between the injectors via the pipe sections means a minimum amount of wiring, while dispensing with a common high-pressure rail with separate high-pressure lines connected in parallel. The injectors preferably have a larger diameter or a cross section that is larger in terms of surface area than the channel running perpendicularly thereto. This simplifies a sealing system gene of the ends of the tube elements in each case on the side walls of the injectors.

The assembly of the cylinder head according to the invention can be simplified in that the cylinder head has the following: n (n>1, preferably n=4) injectors crossing the channel perpendicularly and being supplied with fuel in series, an input tubular element running in an input area of the channel for supplying fuel from a high-pressure pump to the first injector, n-1 (preferably 3) intermediate pipe elements running in each case between two injectors in the channel, one end of which seals against a discharge area of one injector and the other end seals against a feed area of the following one injector abuts, and running in an exit region of the channel exit pipe element for discharging fuel from the last injector to a leakage chamber, all pipe elements running along a channel axis through the cylinder head. The inlet tubular element preferably protrudes from one channel opening and the outlet tubular element preferably protrudes from the other channel opening. In other words, the channel can be formed as a through channel or as a through hole through the cylinder head, which is crossed by the preferably four injector receiving spaces. The fuel comes from the high-pressure pump and is fed to the inlet pipe element. From there it is forwarded from injector to injector and distributed serially. Excess fuel can be discharged via the outlet pipe element.

The inlet and outlet pipe elements and indirectly also the intermediate pipe elements are preferably pressed sealingly against the feed areas and/or discharge areas of the associated injectors, starting from one or from both ends of the channel. The force required for the pressing can be reduced in that the two outer tubular elements (the inlet tubular element and/or the outlet tubular element) are pressed inwards into the channel against the associated injectors by means of clamping elements such as screw connections or clamping nuts. As a result, the fuel line, which consists of the injectors and the pipe elements and runs through the cylinder head, is tightened in an overall sealing manner. The screw connection is only necessary at the two ends of the channel, because the force along the series connection of the tubular elements has the same amount at every point. The pipe elements are pressed against the side of the injectors with great force, thus sealing off the high fuel pressures.

With regard to a simple and cost-effective design of the fuel line, it has proven to be advantageous that the pipe elements are each designed as tubular lances, which are attached to one or both pipe ends of the lances with a preferably substantially conically tapering sealing surface for contact with one Counter sealing surface of an injector are equipped. Alternatively or additionally, the counter-sealing surfaces of the injectors for contacting the pipe ends of the lances are designed as preferably essentially conically narrowing depressions for engaging the pipe ends of the lances. With regard to improved tightness, it has proven to be expedient for the sealing surfaces to be of convex design, at least in sections, while the counter-sealing surfaces can be of purely conical design. As a result, manufacturing tolerances can be compensated during the clamping and a tight contact pressure can be achieved with a negligible offset of the parts to be clamped in the longitudinal direction of the duct.

The production of the cylinder head according to the invention can be further simplified in that at least one injector can be inserted during assembly with play in the longitudinal direction of the duct into an injector receiving space that intersects the duct essentially perpendicularly, with the injector being pressed against the pipe elements from both sides by the subsequent pressing Injector can be fixed in a correct position in the longitudinal direction of the channel within the injector accommodating space. This play of the injector in the injector receiving space can be necessary so that the injector can be inserted past an end of a tubular element that already projects into the injector receiving space, transversely to the longitudinal direction of the channel and into the injector receiving space.

According to a particularly important aspect of the invention, a leakage space is formed between the outer wall of the tubular element in contact with the discharge area of an injector and the inner wall of the duct, via which a leakage quantity of fuel can be discharged concentrically around the tubular element. The leakage is discharged via the space between the tubular element and the duct and has its drain connection at that duct end from which the outlet tubular element protrudes. Sealing elements such as sealing rings or O-rings surrounding the injectors can be provided to seal off the leakage chamber from the injector receiving chambers. The leakage is under a significantly lower pressure than the fuel to be supplied, so that in this case sealing by means of conventional sealing elements is possible.

In conventional fuel supply devices with a common rail, the common rail volume is used in particular for Avoidance of pressure fluctuations or pressure waves from injector to injector. Such pressure fluctuations can be prevented in the cylinder head according to the invention with serial fuel transfer from injector to injector in that the injectors themselves preferably have a fuel-fillable rail volume in the injector tip, which can be brought into fluid connection with the supply area of the respective injector and via the fuel line with Fuel can be filled. In each injector, a first fuel channel preferably leads from the supply area to the discharge area and a fuel channel branching therefrom from the supply area to the rail volume arranged in the injector tip, which reduces pressure fluctuations as a result of the injection process.

According to a further aspect, the invention relates to a method for manufacturing a cylinder head according to the invention, in which an injector is inserted into an injector receiving space which intersects a passage leading through the cylinder head, and an input tubular element is inserted into the passage so that it on one side of the injector rests against a fuel supply area of the injector. According to the method according to the invention, an intermediate tubular element is introduced into the channel so that it rests against a fuel discharge area of the injector on the other side of the injector, and then the two tubular elements are placed sealingly against the injector, in particular pressed against it.

If the cylinder head to be produced has more than one injector, the injectors are inserted into injector receiving spaces connected to one another via the channel and tube elements are inserted into the channel in such a way that a tube element is arranged between adjacent injectors and at the beginning and end of the channel. Finally, by exerting external pressure on the first and/or the last pipe element (inlet pipe element and/or outlet pipe element), all pipe elements are pressed sealingly onto the injectors lying against them.

In order to enable the tubular elements to be pressed tightly against the injectors, the intermediate tubular elements are preferably slightly longer than the channel sections extending between the individual injector receiving spaces, so that the intermediate tubular elements at least partially protrude into the injector receiving spaces. Therefore, during assembly, at least one injector can be inserted tilted relative to the longitudinal direction of the injector receiving space or offset relative to the center of the receiving space in order to get past a tube end of a tube element that already protrudes into the injector receiving space.

During production, tubular elements and injectors to be placed on them are preferably alternately inserted into the cylinder head. The introduction of an injector at a point in time at which both tubular elements to be placed on it have already been introduced can be problematic as a result of the lack of space in the injector receiving space.

• 1 einen erfindungsgemäßen Zylinderkopf mit vier Injektoren in einem Längsschnitt durch den Kanal,
• 2 den Eingangsbereich des Kanals des in 1 dargestellten Zylinderkopfs in einer vergrößerten Ansicht,
• 3 den Eingangsbereich des Kanals des in 1 dargestellten Zylinderkopfs in einer vergrößerten Ansicht,
• 4 eine der Verdeutlichung dienende Ansicht, die die aus Rohrelementen und Injektoren bestehende Kraftstoffversorgung des in 1 gezeigten Zylinderkopfs ohne das Basisteil des Zylinderkopfs zeigt,
• 5 den erfindungsgemäßen Zylinderkopf in einer perspektivischen Ansicht, und
• 6 einen herkömmlichen Zylinderkopf in einer perspektivischen Ansicht.

The invention is explained in more detail below with reference to the drawings. These show in

• 1 a cylinder head according to the invention with four injectors in a longitudinal section through the channel,
• 2 the entrance area of the canal of the in 1 illustrated cylinder head in an enlarged view,
• 3 the entrance area of the canal of the in 1 illustrated cylinder head in an enlarged view,
• 4 an explanatory view showing the fuel supply system consisting of pipe elements and injectors in 1 shows the cylinder head shown without the base part of the cylinder head,
• 5 the cylinder head according to the invention in a perspective view, and
• 6 a conventional cylinder head in a perspective view.

In 1 an exemplary embodiment of a cylinder head 10 according to the invention for an internal combustion engine such as a diesel engine is shown in a longitudinal section. Along a channel axis A, a channel 30 leads through the cylinder head, which is designed as a through hole in the illustrated embodiment. Channel 30 is intersected at four spaced-apart positions by an injector accommodating space running perpendicular thereto, in which an injector 20, 22, 24, 26 for injecting fuel, in particular diesel, into a combustion chamber (not shown) is accommodated.

A total of five separate tubular elements 40 , 42 , 44 , 46 , 48 designed as tubular lances are accommodated in the channel 30 . Of these, three tubular elements are designed as intermediate tubular elements 42, 44, 46 and are each accommodated in a channel section between two injector accommodation spaces. A fourth tubular element is designed as an input tubular element 40 and is accommodated in an input section of the channel 30 . One end of the input pipe element 40 protrudes from the channel 30 and the other end of the input pipe element 40 is in sealing contact with the first injector 40 . Finally, a fifth tubular element is designed as the starting tubular element 48 and received in an exit portion of the channel 30. One end of the output tubular member 48 protrudes from the passage 30 at the opposite end thereof and the other end of the output tubular member 48 is sealingly engaged with the fourth injector 26 .

The number n of intermediate pipe elements 42, 44, 46 depends on the number of injectors to be supplied with fuel in series. In the case of only a single injector to be supplied, no intermediate pipe element is required. In the case of two injectors, a single intermediate pipe element is provided between two injectors. The intermediate pipe elements 42, 44, 46 each connect two adjacent injectors with one another in such a way that fuel under high pressure flows from the discharge area of one injector (e.g. discharge area 23 of the first injector 20) to the feed area of the next injector in the row (e.g. feed area 25 of the second injector 22) can be guided.

In the example shown with four injectors 20, 22, 24, 26, fuel is pumped in from a high-pressure pump (not shown) in 1 introduced from the left into the input tubular element 40, which rests sealingly against the feed area 21 of the first injector. Starting from the supply area 21, the fuel flows into a rail volume 28 arranged in the injector tip (see Fig 3 ) and on the other hand through the injector 20 to the discharge area 23 of the first injector 20. The further tubular element 42 is in sealing contact with the discharge area 23 and via which the fuel is supplied to the feed area 25 of the second injector 22. The second injector 22 is constructed analogously to the first injector 20 . The four injectors 20, 22, 24, 26 are thus supplied with fuel in series without a common high-pressure rail being required, from which the individual injectors are supplied in parallel. Starting from the outlet pipe element 48, the residual fuel is discharged from the channel 30 at the other end and fed to a leakage space. Since the fuel flows through the cylinder head along the channel axis A, a minimum number n of lines or high-pressure connections is required.

Since the tube elements are pressed onto the associated injectors on both sides, a particularly high level of tightness can be achieved at the connection points between the tube ends and the feed/discharge areas of the injectors. The tightness can be further improved in that the pipe ends 41, 43 each have tapering sealing surfaces which can be pressed against counter-sealing surfaces designed as tapering depressions in the side walls of the injectors (see in particular 3 ). The tight connections are made by exerting pressure on the ends of the inlet and outlet pipe elements protruding from the two channel ends, so that the pipe ends with the injectors lying against them are pressed.

In 4 shows how the tubular elements designed as lances are pressed laterally against the injectors from the outside by means of two clamping nuts 50, 52 with great force F. In this case, the clamping nuts are only required on the input tubular element 40 and on the output tubular element 48 because the force in the series connection running along the channel axis A has the same amount at each connection point. A single pressing step is sufficient to seal the entire, in 4 Fuel line shown, so that the assembly effort is minimized and the maintenance effort is reduced.

In 3 it is shown that an intermediate space is formed between the outer wall of the tubular element 42 and the inner wall 35 of the channel, which serves as a leakage space 37 . A quantity of leakage is discharged in the leakage volume concentrically around the lances in the direction of the right channel outlet. The leakage space 37 can be sealed off by means of sealing rings in relation to the injector receiving spaces running transversely to the channel. Such a leakage space 37 can only be formed between the outlet pipe element 48 and the channel 30 or alternatively also between one or more intermediate pipe elements 42 , 44 , 46 or between the inlet pipe element and the channel 30 . Also with regard to a radial tolerance compensation during the pressing, it can be advantageous that the tube elements 40, 42, 44, 48, 48 are accommodated in the channel 30 with radial play.

What is important is the rail volume 28 present in each injector tip (see 3 ), which is filled with fuel via the fuel line and is used in particular to compensate for pressure fluctuations.

In the 5 and 6 a conventional cylinder head (no reference number) and a cylinder head 10 according to the invention are compared to one another. are clearly in 6 the high-pressure rail 110 and the numerous individual connections 120 emanating from it are visible. In contrast, the in 5 shown cylinder head 10 according to the invention particularly compact and low-maintenance. Manufacturing costs can also be reduced due to the reduced number n of required components. In addition, the assembly of the fuel supply can be done particularly quickly and easily.

With regard to simple injector assembly, the injectors can each be fitted with an axial play (indicated by reference number 60 in 3 ) with respect to the longitudinal direction of the channel 30 can be introduced into the injector receiving spaces. In this case, the injectors can also be inserted into the injector receiving spaces when a lance is already protruding from the channel 30 into the receiving space.

Reference List

10

cylinder head

20

first injector

21

Feeding area of the first injector

22

second injector

23

Discharge area of the first injector

24

third injector

25

Feeding area of the second injector

26

fourth injector

28

rail volume

30

channel

35

inner wall of the canal

37

leakage space

40

input pipe element

41

pipe end

43

pipe end

42, 44, 46

intermediate tubular elements

48

exit pipe element

50, 52

Screw connections/clamping nuts

60

end play

110

high pressure rail

120

high pressure supply lines

130

leakage lines

140

high pressure pump

A

channel axis

Claims (9)

Cylinder head (10) for an internal combustion engine with at least two injectors (20, 22, 24, 26) for injecting fuel, a fuel line running through a channel (30) running in the cylinder head (10) for conducting fuel to/from the injectors ( 20, 22, 24, 26), characterized in that the fuel line has at least three separate tubular elements (40, 42, 44, 46, 48), the tubular elements (40, 42, 44, 46, 48) having an input - tubular element (40), an output tubular element (48) and at least one intermediate tubular element (42, 44, 46), wherein intermediate tubular elements (42, 44, 46) each have two adjacent injectors (20, 22, 24, 26) connect to each other, and the channel (30) is intersected at mutually spaced positions in each case by an injector receiving space in the cylinder head (10) running perpendicularly thereto, with each of the injectors (20, 22, 24, 26) on one side having a Feed area (21, 25) and on the other side a discharge area I (23), and a tubular element (40, 42, 44, 46) each for supplying fuel to the respective injector (20, 22, 24, 26) sealingly on the supply area (21, 25) of the respective injector (20 , 22, 24, 26), wherein a tubular element (42, 44, 46, 48) in each case for passing on fuel from the respective injector (20, 22, 24, 26) sealingly on the discharge area (23) of the respective injector ( 20, 22, 24, 26), the intermediate tubular elements (42, 44, 46) being longer than the channel sections of the channel (30) extending between the individual injector receiving spaces, so that the intermediate tubular elements (42 , 44, 46) protrude at least partially into the injector receiving spaces. cylinder head after claim 1 , Characterized by two or more injectors (20, 22, 24, 26) each perpendicularly intersecting the channel (30) between which the intermediate tubular elements (42, 44, 46) for conducting fuel run in the channel (30), which allow fuel to be supplied to the injectors (20, 22, 24, 26) in sequence. cylinder head after claim 2 , characterized by a number n of injectors (20, 22, 24, 26) perpendicularly intersecting the channel (30), according to which n>1 applies, an input tubular element (40) running in an input area of the channel (30) for supplying fuel from a high-pressure pump to the first injector (20), a number n-1 of intermediate pipe elements (42, 44, 46) running between two injectors (20, 22, 24, 26) in the channel (30), one pipe end thereof sealingly against the discharge area (23) of the injectors (20, 22, 24), and the other end of the pipe sealingly against a supply area (21, 25) of the following injector (22, 24, 26), and in an outlet area of the channel ( 30) extending exit pipe element (48) for discharging fuel from the last injector (26) of the injectors (20, 22, 24, 26), all pipe elements (40, 42, 44, 46, 48) along a channel axis ( A) pass through the cylinder head. cylinder head after claim 3 , characterized in that the inlet and the outlet pipe element (40, 48) and indirectly also the intermediate pipe elements (42, 44, 46) starting from one or from both outlet openings of the channel (30) by means of one or more clamping elements sealing are pressed against the feed areas (21, 25) and/or discharge areas (23) of the injectors (20, 22, 24, 26) adjoining the feed areas (21, 25) and/or discharge areas (23). Cylinder head according to at least one of the preceding claims, characterized in that the tube elements (40, 42, 44, 46, 48) are each designed as tube-shaped lances which have a conically tapering sealing surface at one or both tube ends (41, 43). are equipped to rest against a counter-sealing surface of an injector (20, 22, 24, 26), and/or that the counter-sealing surfaces of the injectors (20, 22, 24, 26) are designed as conically narrowing depressions for engaging the pipe ends (41, 43) are trained. Cylinder head according to one of the preceding claims, characterized in that between the outer wall of the tubular element (42, 44, 46) bearing against the discharge area (23) of the injectors (20, 22, 24, 26) and the inner wall (35) of the channel ( 30) a leakage chamber (37) is formed, via which a quantity of fuel leakage can be discharged concentrically around the tubular element (42, 44, 46). Cylinder head according to one of the preceding claims, characterized in that the injectors (20, 22, 24, 26) each have a fuel-fillable rail volume (28) which is in fluid communication with the feed region (21, 25) of the respective injector (20). stands. Method for manufacturing a cylinder head (10) according to one of the preceding claims, in which injectors (20, 22, 24, 26) are introduced into injector receiving spaces, characterized in that an inlet tubular element (40) into the channel (30) and a first injector (20) are inserted into the injector accommodating space, so that the input pipe element (40) on one side of the first injector (20) at a fuel supply area (21, 25) of the first injector (20) and then at least one intermediate tubular element (42, 44, 46) is inserted into the channel (30) and at least one further injector (22, 24, 26) so that the intermediate tubular element (42, 44, 46) on the one hand on the discharge area (23) of the one adjacent injector (20, 22, 24, 26) and on the other hand on the feed area (21, 25) of the other injector (22, 24, 26), and then an outlet pipe element (48 ) is introduced into the channel (30), so that between the adjacent injectors (2 0, 22, 24, 26) and at the beginning and end of the channel (30) tubular elements (40, 42, 44, 46, 48) are arranged, the tubular elements (40, 42, 44, 46, 48) then sealingly are applied to the at least two injectors (20, 22, 24, 26) and by exerting external pressure on the inlet pipe element (40) and/or the outlet pipe element (48), all arranged pipe elements (40, 42, 44, 46, 48) are pressed sealingly against the injectors (20, 22, 24, 26) resting on the tubular elements (40, 42, 44, 46, 48). procedure after claim 8 , characterized in that at least one injector (20, 22, 24, 26) is introduced tilted or offset relative to the longitudinal axis of the injector receiving space in order to be attached to a tube end of a tube element (40, 42, 44 , 46, 48) to pass.

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