Fuel distributor slat for an injection device and injection device for a mixed compression, externally ignited internal combustion engine

Abstract

Fluid distributor (2), in particular fuel distributor strip (3), for a injection device (1) for a mixed compression, externally ignited internal combustion engine, which uses a fluid for dosing at high pressure, having a base body (14), at least one high-pressure outlet (16'-19') and at least one connection piece (16-19) connected to the base body (14) for the high-pressure outlet (16'-19'), wherein the base body (14) is configured by one or more stages of forging, wherein after forging at least one inner space (11) of the base body (14) is configured on the base body (14) by means of a cutting process, and wherein the connection piece (16-19) is processed by means of a cutting process. It is proposed that at least one holding element (40-43) is provided, which is configured on the connection piece (16-19) by means of a cutting process, at least one receiving opening (66, 67) leading through a wall (68) of the connection piece (16-19) from an outer side (47-50) of the connection piece (16-19) (the receiving opening is used to at least partially receive the holding element (40-43)) and a receiving space (64) are configured, into which a connecting stub (7'-10') of an injection valve (7-10) can be at least partially introduced in an installation direction (46) when installed, and in the installed state, at least indirectly, by means of the holding element (40-43) arranged in the receiving opening (66, 67), the connecting stub (7'-10') of the injection valve (7-10) arranged at least partially in the receiving space (64) of the connection piece (16-19) is supported at least indirectly opposite the installation direction (46). Furthermore, a injection device (1) having such a fluid distributor (2) is described.

Description

TECHNICAL FIELD

[0001] The invention relates to a fluid distributor, in particular a fuel distributor plate, for a injection device for a mixed-compression, externally ignited internal combustion engine. In particular, the invention relates to the field of such injection devices of a motor vehicle in which direct injection of fuel into the combustion space of the internal combustion engine takes place. BACKGROUND

[0002] From DE 10 2016 115 550 A1 a method for manufacturing a fuel distributor is known, in which a distributor tube is manufactured from a forged blank. Here, an austenitic steel can be used. From DE 10 2018 110 342 A1 two essentially mutually different embodiments for a fuel distributor are known. In the first embodiment, a forged pressure accumulator tube is closed with a closing piece. The closing piece is not screwed in here, but is inserted into an end portion of the pressure accumulator tube and is inductively welded. In the second embodiment, instead of the closing piece of the closed end portion, a joint piece is provided. The joint piece is provided with an external thread necessary for the mounting.

[0003] From DE 10 2012 206 887 A1 a fuel injection device for high-pressure injection in an internal combustion engine is known. Here, the fuel injection valve is fastened on the associated cup by a holding element. The holding element has a first leg and a second leg which are guided through recesses in the wall of the cup. SUMMARY

[0004] The fluid distributor according to the invention and the injection device according to the invention have the advantage that an improved configuration and action principle is achieved.

[0005] Due to the measures listed in the preferred embodiments, advantageous refinements of the fluid distributor given in the invention and the injection device given in the invention are possible.

[0006] The injection device according to the invention is used for a mixed-compression, externally ignited internal combustion engine. The injection device according to the invention is used for injecting gasoline and / or ethanol and / or a fuel of the same kind and / or for injecting a mixture with gasoline and / or ethanol and / or a fuel of the same kind. The mixture can be, for example, a mixture with water. The fluid distributor according to the invention is used for such an injection device.

[0007] At least the base body of the fluid distributor is constructed from a material which is preferably a corrosion-resistant steel (stainless steel), in particular an austenitic stainless steel. Non-corrosion-resistant steels can also be used with a corresponding coating to prevent corrosion. In particular, the material can be based on an austenitic stainless steel having the material number 1.4301 or 1.4307 or on a stainless steel of the same kind. The hydraulic connection provided on the base body can be constructed as a high-pressure inlet, a high-pressure outlet or another high-pressure connection. Preferably, the base body together with the high-pressure inlet and, if necessary, one or more other high-pressure connections is shaped in the manufacture from a forged blank and further processed.

[0008] Although at least one high-pressure connection constructed as a high-pressure outlet is constructed at least partially from a connection piece which is first processed separately from the tubular base body in the manufacture. The connection piece can be, for example, machined separately from the tubular base body and then connected to the tubular base body, preferably material-lockingly or, if necessary, also force- lockingly. The material-locked connection can be constructed, in particular, by brazing, in particular induction brazing, or by welding, in particular by laser welding, wherein the joining method is preferably implemented in such a way that only a local heating of the components involved takes place. Thus, in the proposed design of the fuel distributor with a forged base body, an important difference to the brazing rail is produced, in which the tube for the brazing rail is machined and deburred before the welded add-on part. By the forged design, in particular, a design for higher pressures can be achieved. An important difference to the high-pressure rail for self-igniting internal combustion engines lies in the material selection and the processing, in particular in the forging of the stainless steel. The general design of the high-pressure outlet also differs between fuel distributors for self-igniting engines and externally ignited engines.

[0009] Since the connection piece can be processed, in particular machined, independently of the forged base body, important advantages arise in the manufacture. In particular, a structural design can be achieved which is not possible in the one-piece forged embodiment or can only be achieved with disproportionately large outlay. Thus, in particular, a suspension device for one or more fuel injection valves can be achieved in an advantageous manner. For example, on the high-pressure outlet, a long projecting cup with longitudinal bores and lateral bores and, if necessary, a deposit and a side cut can also be achieved by the connection piece. Furthermore, a cost advantage arises with respect to the integrally forged design when the input weight for the forged blank can thereby be reduced to such an extent that the additional costs for the prepared connection process, in particular the brazing process, are overcompensated.

[0010] An advantageous development is particularly advantageous at this point, wherein the joint piece is at least substantially machined by means of the cutting machining before the connection to the base body and / or a connection face, in particular an at least partially cylindrical connection face, is configured on the tubular base body by means of the cutting machining, on which connection face the joint piece is connected to the tubular base body and / or a shoulder, a recess, a cutback or a welded-on connection piece is provided on the tubular base body, on which shoulder, recess, cutback or welded-on connection piece the joint piece is connected to the tubular base body. In particular, this simplifies the manufacture of the joint piece in series production. In order to manufacture the fluid distributor, the respectively required number of joint pieces can be assigned to the forged base body.

[0011] It is also possible in an advantageous development for the outer side of the joint piece to be machined, which is difficult to access or no longer accessible in the final state, wherein at least one outer side of the joint piece is at least partially machined by means of the cutting machining on the joint piece. The following development has corresponding advantages, wherein an at least substantially flat partial face is configured on the outer side of the joint piece and a receiving opening through the wall of the joint piece for receiving the holding element passes through the substantially flat partial face of the outer side of the joint piece from the outer side through the wall of the joint piece. Furthermore, a drill bit of a drilling tool can be placed in an advantageous manner on the flat partial face.

[0012] According to an advantageous embodiment, the substantially flat partial face is delimited by a side cut, which adjoins the flat partial face counter to the mounting direction.

[0013] According to an advantageous embodiment, the receiving opening through the wall of the joint piece is configured as a drill hole, in particular as a through-going receiving opening, for at least partially receiving the holding element.

[0014] According to an advantageous embodiment, a recess is configured on the outer side of the joint piece, which extends along the mounting direction, into which recess the nose of the injection valve is inserted in the mounted state in order to form a torsion-resistant portion.

[0015] According to an advantageous embodiment, the joint piece is based on a substantially cylindrical basic shape.

[0016] According to an advantageous embodiment, the holding element has a first leg and a second leg, the receiving opening serves for receiving the first leg of the holding element, on the joint piece, by means of the cutting machining, a further receiving opening is configured which passes through the wall of the joint piece from the outside of the joint piece, the further receiving opening serves for receiving the second leg of the holding element, and, in the mounted state, the connecting stub of the injection valve, which is at least partially arranged in the receiving space of the joint piece, is supported at least indirectly on opposite sides by means of the first leg of the holding element arranged in the receiving opening and the second leg arranged in the further receiving opening.

[0017] Furthermore, it is possible to realize a geometry which, due to requirements when the forging blank is demoulded, is at least not possible to realize without tools.

[0018] It is possible to realize the one or more receiving openings in an advantageous manner. This makes it possible to realize the receiving openings in a simple manner. Furthermore, it is possible to realize a reliable positioning of the suspended injection valve in an advantageous manner. Here, it is possible to realize an advantageous suspension. The connecting stub of the injection valve can directly abut on the leg of the holding element. An indirect abutment is also possible, for example by means of at least one intermediate piece or bearing and / or by means of at least one damping element. Here, the leg of the holding element can have a circular profile in an advantageous manner. BRIEF DESCRIPTION OF DRAWINGS

[0019] Preferred embodiments of the present application are explained in more detail in the following description, with reference to the drawings, in which corresponding elements are provided with identical reference symbols. The drawings show:

[0020] Figure 1 a possible configuration of an injection device for a mixed-compression, externally ignited internal combustion engine according to the present application, shown in a schematic sectional view, the injection device having a fluid distributor configured as a fuel distributor;

[0021] Figure 2 a fluid distributor shown in Figure 1 , according to a first embodiment, shown in a schematic, detailed view;

[0022] Figure 3 a fluid distributor shown in Figure 1 , according to a second embodiment, shown in a schematic, detailed view;

[0023] Figure 4 a fluid distributor shown in Figure 1 , according to a third embodiment, shown in a schematic, detailed view;

[0024] Figure 5 a fluid distributor as shown in Figure 1 is shown in detail in the schematic drawing corresponding to the fourth embodiment;

[0025] Figure 6 a fluid distributor as shown in Figure 1 is shown in detail in the schematic drawing corresponding to the fifth embodiment;

[0026] Figure 7 a fluid distributor as shown in Figure 1 is shown in detail in the schematic drawing corresponding to the sixth embodiment;

[0027] Figure 8 a fluid distributor as shown in Figure 1 is shown in detail in the schematic drawing corresponding to the seventh embodiment;

[0028] Figure 9 a fluid distributor as shown in Figure 1 is shown in detail in the schematic drawing corresponding to the eighth embodiment;

[0029] Figure 10 a fluid distributor as shown in Figure 1 is shown in detail in the schematic drawing corresponding to the ninth embodiment, and

[0030] Figure 11 a fluid distributor is shown schematically in order to explain the principle of action of the invention. DETAILED DESCRIPTION

[0031] Figure 1 A fuel distributor (fluid distributor) 2 of an injection device 1 is shown in a schematic cross-sectional view corresponding to one possible configuration. In this configuration, the fuel distributor of the fuel injection device 1 is a fuel distributor strip 3 which corresponds to the configuration according to the invention. Furthermore, a high-pressure pump 4 is provided. The high-pressure pump 4 is connected to the fuel distributor by means of a fuel pipe 5 which is configured as a high-pressure pipe. In operation, fuel or a mixture with fuel is supplied as a fluid to an input end 6 of the high-pressure pump 4.

[0032] The fuel distributor serves to store the fluid and to distribute the fluid to injection valves 7 to 10 which are configured as fuel injection valves 7 to 10 and to reduce pressure fluctuations and pulsations. The fuel distributor can also serve to dampen pressure pulsations which can occur when the fuel injection valves 7 to 10 are switched. In operation, here, a high pressure p can at least temporarily occur in an inner space 11 of the fuel distributor strip 3.

[0033] The fuel distributor configured as a fuel distributor strip 3 has a tubular base body 14 which is configured by one or more stages of forging and subsequently is machined mechanically. The fuel distributor strip 3 furthermore has a high-pressure input 15 and a plurality of connection pieces 16 to 19 arranged on the tubular base body 14, which are used for high-pressure outputs 16' to 19'. Furthermore, a pressure sensor connection 20 is arranged on the tubular base body 14. In this configuration, the tubular base body 14, the high-pressure input 15 and the pressure sensor connection 20 are configured from a forged single piece 14'. Thus, the high-pressure input 15 and the pressure sensor connection 20 are forged on the tubular base body 14.

[0034] Although the connection pieces 16 to 19 are not forged on the tubular base body 14 and are manufactured first separately from this base body, in particular by machining. The connection pieces 16 to 19 can be connected to the tubular base body 14 by brazing. However, other material-locking connections are also conceivable. Depending on the application, a force-locking connection can also be meaningful.

[0035] The fuel injection valves 7 to 10 are connected on the high-pressure outputs 16' to 19' of the fuel distributor, respectively. Here, the fuel injection valves 7 to 10 hang in the installed state on the connection pieces 16 to 19 which serve as cups. Furthermore, a pressure sensor 21 is arranged which is connected on the pressure sensor connection 20. On one end 22, the tubular base body 14 is blocked by a blocking device 23 configured as a blocking screw 23 in this exemplary configuration. Here, the end 22 of the tubular base body 14 can be configured as a threaded nipple 22'. In a modified configuration, an axial high-pressure input can be arranged on the end 22 or on one end 24 instead of the radial high-pressure input 15.

[0036] After forging, the tubular base body 14 or the forged single piece 14' is machined by at least one machining process. In this configuration, after forging, a bore 25 is also configured in the tubular base body 14 in order to form an inner space 11. In operation, the fluid supplied on the high-pressure input 15 can be distributed via the inner space 11 to the fuel injection valves 7 to 10 connected on the high-pressure outputs 16' to 19'.

[0037] Furthermore, bores 26 to 31 are introduced into the forged single piece 14' by machining. Here, the bores 27 to 30 serve as connection bores 27 to 30 for the high-pressure outputs 16' to 19'. The bore 26 serves for the high-pressure input 15. The bore 31 serves for the pressure sensor connection 20.

[0038] Furthermore, bores 32 to 37 are provided on the high-pressure input 15, the high-pressure outputs 16' to 19' and the pressure sensor connection 20. In this embodiment, the bore 25 is oriented axially with respect to the longitudinal axis 38. In this embodiment, the bores 32 to 37 are oriented radially with respect to the longitudinal axis 38.

[0039] In Figure 1 In the schematic illustration, the bores 33 to 36 are oriented radially with respect to the longitudinal axis 38. In possible configurations of the application, the bores 33 to 36 are preferably oriented radially or radially eccentrically with respect to the longitudinal axis 38. The positioning of the high-pressure input 15, the pressure sensor connection 20 and the connection pieces 16 to 19, in particular along the longitudinal axis 38, is selected in Figure 1 and the other figures only exemplarily and, if necessary, from simplified illustrations. In particular, these positions are not necessarily uniformly and consistently selected in the different figures.

[0040] On the high-pressure outputs 16' to 19', respectively, holding elements 40 to 43 are provided. Exemplarily, the holding element 40 is also according to Figure 3 Further explanations. In the installed state, the connecting pipes 7' to 10' of the injection valves 7 to 10 are suspended on the high-pressure outputs 16' to 19' by means of the holding elements 40 to 43. The injection valves 7 to 10 are arranged in bores of a cylinder head 44. By means of the respectively realized suspension, a support of the injection valves 7 to 10 on the cylinder head 44 can be avoided. For example, the injection valve 7, when installed along an axis 45, is inserted into the connection piece 16 in an installation direction 46. Then, in the installed state, the injection valve 7 is supported counter to the installation direction 46 by means of the holding element 40. On the outer sides 47 to 50 of the connection pieces 16 to 19, recesses 51 to 54 are provided which extend along the assembly direction 46, into which recesses, respectively, a nose 55 to 58 of the injection valves 7 to 10 is inserted in the installation, in order to form a torsion-resistant portion. Thereby, the injection valves 7 to 10 are then reliably fastened.

[0041] According to Figures 2 to 10 , further explanations are made of the fluid distributor 2 and the injection device 1 according to the first to ninth embodiments in a possible implementation. Depending on the application, here, too, a combination of the measures explained can be realized, if this is meaningful. Although, especially in the context of mass production, this can be meaningful if, in particular, the connection pieces 16 to 19 are configured in a corresponding manner for the specific application case. According to Figure 11 Problems which can arise in configurations consisting of a forged single piece are elucidated. Exemplarily, in the embodiments explained, a configuration is explained according to the connection piece 16 or the high-pressure output 16'.

[0042] Figure 2 In a detailed schematic illustration, a configuration according to the first embodiment is shown inFigure 1 The fluid distributor 2 shown in Fig. 1 is fastened to the cylinder head 44 by means of fastening elements 60, 61. In this embodiment, the fastening elements 60, 61 are integrally forged with the tubular base body 14. This results in restrictions in terms of shaping. In particular, a die slope can be provided, so that, for example, a conical outer side 62 can be produced on the fastening element 60. In contrast thereto, the joint piece 16 can be based on a cylindrical basic shape 63. Starting from the cylindrical basic shape 63, further machining can be carried out. Thereby, for example, the recess 51, a bore 64 along the axis 45, which forms a receiving space 64 for a connecting stub 7' of the injection valve 7, a flat partial surface 65 of the outer side 47 and bores 66, 67 through the wall 68 of the joint piece 16, which constitute receiving openings for the holding elements 40, can be formed.

[0043] The joint piece 16, which is configured as a cup, can thus be machined as a single piece to such an extent that only the connection to the tubular base body 14 remains. Thereby, on the one hand, restrictions due to forging in terms of shaping can be avoided. On the other hand, important advantages in terms of tool accessibility can be achieved in the manufacture, which can not be present in an integrally forged embodiment of the fluid distributor, as is shown, for example, in the fluid distributor 2' shown in Fig. 2. Figure 11

[0044] The joint piece 16 can be connected to the tubular base body 14 by means of a welded connection. In particular, an induction brazing can be used, in which only a local heating in the connection region is necessary, so that the existing strength advantages, such as, for example, the bore shear, are preserved, in particular at high-stress locations. In this case, certain welding methods, such as, for example, a laser beam welding method, are also suitable for the connection, since with said welding methods only a local heating in the connection region can also be achieved.

[0045] Figure 3 The fluid distributor 2 according to the second embodiment is shown in detail in Fig. 2. In the cylindrical basic shape 63, a recess 69 is added by means of machining, which is adapted to the outer side 70 of the tubular base body 14. Thereby, an improved mechanical loadability is achieved. Furthermore, a holding element 40 is shown, which has a first leg 71 and a second leg 72. In the installation, first, the connecting stub 7' of the injection valve 7 is at least partially embedded into the receiving space 64 along the axis 45 in the installation direction 46. Figure 1 Figure 2 ​​The retaining element 40 is then inserted into the joint piece 16 in the direction 73, with the first leg 71 leading into the bore 66 and the second leg 72 leading into the bore 67. The injection valve 7 is then suspended on the joint piece 16. In this embodiment, the flat partial face 65 is bounded by a side cut 74, which follows the flat partial face 65 in the direction of installation 46. This side cut 74 can advantageously be produced by means of a machining operation.

[0046] Figure 4 A fluid dispenser 2 according to a third embodiment is shown in a detailed schematic view in Figure 1 The side cut 74 is located between the flat partial face 65 and the lower side 75. In a modified embodiment, the flat partial face 65 can also extend to the lower side 75 of the joint piece 16.

[0047] The retaining element 40 shown in Figure 3 is inserted into the joint piece 16 in the direction 73 along an axis 80, which is perpendicular to the flat partial face 65. In the embodiment shown in Figure 2 and Figure 3 , the axis 80 is at least approximately parallel to the longitudinal axis 38 of the tubular base body 14, in the embodiment shown in Figure 4 , the axis 80 is arranged with a non-negligible rotation about the axis 45 relative to the longitudinal axis of the tubular base body 14. It is thereby possible for the notch 51 to point towards the conical outer side 62 of the fastening element 60. If the joint piece 16 is integrally forged on the tubular base body 14, the notch 51 cannot be produced or can only be produced at disproportionate expense, since the fastening element 60 can block the tool for machining. Conversely, this configuration can be implemented in the proposed fluid dispenser 2, since the machining operation is carried out before the joint piece 16 is connected to the tubular base body 14.

[0048] Figure 5 A fluid dispenser 2 according to a fourth embodiment is shown in a detailed schematic view in Figure 1 In this embodiment, the axis 80 can be oriented at least approximately parallel to the longitudinal axis 38 of the tubular base body 14, so that the retaining element 40 is inserted into the joint piece 16 in the direction 73 parallel to the longitudinal axis 38. In this embodiment, the bores 66, 67 open into a cylindrical partial face 81 of the outer side 47 of the joint piece 16. Depending on the application, it is possible here, for example, for the flat partial face 65 to be implemented on the one hand as shown in Figure 3 , and for the cylindrical partial face 81 to be implemented on the other hand. However, it is also possible for both to be flat partial faces or for both to be cylindrical partial faces.

[0049] In this embodiment, the cylindrical shell portion face 81 is arranged close to the conical outer side 62 of the fastening element 60. The configuration of the machining, in particular the drilling 66, 67, is possible without difficulty, since this machining is carried out before the connection of the joint element 16 to the tubular base body 14.

[0050] Figure 6 The fluid distributor 2 shown in Figure 1 is shown in detail in the schematic drawing corresponding to the fifth embodiment. In this embodiment, a shoulder 82 is configured on the tubular base body 14, on which, for example, a cylindrical shell outer side can be configured. For example, upon forging, the shoulder 82 can first be configured with a certain material surplus. Then, the shoulder 82 can be at least partially finished. Thus, at least in the connection region 84, in which the joint element 16 is connected to the shoulder 82 of the tubular base body 14, a joining gap is produced which can be very precisely predefined. In the modified configuration, upon finishing, a cylindrical shell outer side can also be implemented on the connection face 83 instead of on the tubular base body 14. Thus, by means of a cutting machining, a connection face 83 can be configured on the tubular base body 14, on which the joint element 16 is connected to the tubular base body 14. In this embodiment, the connection face 83 is formed by a cylindrical shell outer side, wherein, however, other geometrical shapes can also be envisaged.

[0051] Figure 7 The fluid distributor 2 shown in Figure 1 is shown in detail in the schematic drawing corresponding to the sixth embodiment. In this embodiment, a recess 85 is configured on the tubular base body 14 by means of a cutting finishing, wherein shoulder portions 86, 87 are realized. If necessary, one of the shoulder portions 86, 87 can be used to position the joint element 16 along the longitudinal axis 38.

[0052] Figure 8 and Figure 9 The fluid distributor shown in Figure 1 is shown in detail in the schematic drawing corresponding to the seventh or eighth embodiment, respectively. Here, a connection element 88, 89, respectively, is forged onto the tubular base body 14, on which the joint element 16 is connected to the tubular base body 14, respectively. In the embodiment shown in Figure 8 , the connection element 88 is configured eccentrically with respect to the longitudinal axis 38. In the embodiment shown in Figure 9 , the connection element 89 is configured at least substantially non-eccentrically. Here, a reworking, in particular a cutting machining, of the tubular base body 14 can be carried out before the connection of the joint element 16 to the tubular base body 14, respectively.

[0053] Figure 10 The fluid distributor 2 shown in Figure 1The fluid distributor shown in the middle. In this embodiment, the joint piece 16 can be embodied with a short length 90 along the axis 45. In particular, the length 90 can be predefined to be at least comparable or the same as or also smaller than the outer diameter 91 of the joint piece 16. Thereby, a compact size can be achieved. Since the machining of the joint piece 16 is carried out before the connection, a good tool accessibility is produced, so that also a short embodied cup (joint piece 16) can be achieved.

[0054] Figure 11 The fluid distributor 2' is shown schematically in a diagram to explain the working manner of the application. The fluid distributor 2' differs from the proposed fluid distributor 2 in that the joint pieces 16", 17" are forged on the tubular base body. Then, in the explained configuration in the illustrated embodiment according to Figures 1 to 10

[0055] Thus, the proposed configuration of the fluid distributor 2 can achieve additional embodiments with low manufacturing costs in relation to the integrally forged fluid distributor 2'. In particular, embodiments can be achieved which enable the suspension of the injection valves 7 to 10. Here, any orientation of the axis 80 or the direction 73 for the mounting of the holding element 40 can be achieved, as for example according to Figure 3 4

[0056] The holding element 40 has the configuration of two leg portions 71, 72 with the advantage that in the mounted state, the connection stub 7' of the injection valve 7, which is at least partially arranged in the receiving space (bore) 64 of the joint piece 16, is supported on opposite sides.

[0057] The application is not limited to the illustrated possible configurations and embodiments.​​​

Claims

1. Fluid distributor (2) for a injection device (1) of a compression-ignited, externally ignited internal combustion engine, which injection device is used for dosing a fluid under high pressure, the fluid distributor having a base body (14), at least one high-pressure outlet (16' - 19') and at least one connection piece (16 - 19) connected to the base body (14) for the high-pressure outlet (16' - 19'), wherein The base body (14) is configured by a one-stage or multi-stage forging, wherein, after the forging, at least one inner space (11) of the base body (14) is configured on the base body (14) by means of a machining, and wherein the joint piece (16-19) is machined by means of the machining, characterized in that at least one holding element (40-43) is provided, at least one receiving opening (66, 67) and a receiving space (64) are configured on the joint piece (16-19) by means of the machining, which pass through a wall (68) of the joint piece (16-19) from an outer side (47-50) of the joint piece (16-19), the receiving opening serving to at least partially receive the holding element (40-43), a connecting stub (7'-10') of a spray valve (7-10) can be introduced at least partially into the receiving space in an installation direction (46) when installed, and, in the installed state, the connecting stub (7'-10') of the spray valve (7-10) is at least indirectly supported by the holding element (40-43) arranged in the receiving opening (66, 67) against the installation direction (46), the connecting stub being arranged at least partially in the receiving space (64) of the joint piece (16-19), wherein at least substantially flat partial faces (65) are configured on the outer side (47-50) of the joint piece (16-19).

2. Fluid dispenser according to Claim 1, characterized in that wherein the joint piece (16-19) is machined at least substantially before the connection to the base body (14) by means of the machining, and / or a connection face (83) is configured on the tubular base body (14) by means of the machining, on which the joint piece (16-19) is connected to the tubular base body (14), and / or a shoulder (82), a recess (85), a cutback or a forged connection (88, 89) is provided on the tubular base body (14), on which the joint piece (16-19) is connected to the tubular base body (14).

3. Fluid dispenser according to Claim 1 or 2, characterized in that at least one outer side (47-50) of the joint piece (16-19) is at least partially machined on the joint piece (16-19) by means of the machining.

4. Fluid dispenser according to Claim 1 or 2, characterized in that a receiving opening (66, 67) is configured on the outer side (47-50) of the joint piece (16-19) through a wall (68) of the joint piece (16-19) from a substantially flat partial face (65) of the outer side (47-50), the receiving opening serving to receive the holding element (40-43).

5. Fluid dispenser according to Claim 1 or 2, characterized in that The substantially flat partial face (65) is delimited by a side cut (74) which adjoins the flat partial face (65) counter to the mounting direction (46).

6. Fluid dispenser according to claim 1 or 2, characterized in that a receiving opening (66, 67) through a wall (68) of the adapter piece (16-19) is configured to receive a bore, the receiving opening serving to at least partially receive the holding element (40-43).

7. Fluid dispenser according to claim 1 or 2, characterized in that a recess (51-54) extending along the mounting direction (46) is configured on an outer side (47-50) of the adapter piece (16-19), the nose (55-56) of the injection valve (7-10) being embedded in the recess in the mounted state in order to form a torsion-resistant portion.

8. Fluid dispenser according to claim 1 or 2, characterized in that the adapter piece (16-19) is based on a substantially cylindrical basic shape (63).

9. Fluid dispenser according to claim 1 or 2, characterized in that the holding element (40-43) has a first leg (71) and a second leg (72), the receiving opening (66) serving to receive the first leg (71) of the holding element (40-43), a further receiving opening (66, 67) through a wall (68) of the adapter piece (16-19) from an outer side (47-50) of the adapter piece (16-19) is configured by the cutting machining on the adapter piece (16-19), the further receiving opening serving to receive the second leg (72) of the holding element (40-43), and, in the mounted state, at least a portion of the connection stub (7'-10') of the injection valve (7-10) arranged in a receiving space (64) of the adapter piece (16-19) is supported at least indirectly on opposite sides by the first leg (71) of the holding element (40-43) arranged in the receiving opening (66) and the second leg (72) arranged in the further receiving opening (67).

10. Fluid dispenser according to claim 1, characterized in that the fluid dispenser (2) is a fuel dispenser panel.

11. Fluid dispenser according to claim 2, characterized in that the connection face (83) is an at least partially cylindrical shell-shaped connection face.

12. Fluid dispenser according to claim 6, characterized in that the receiving opening (66, 67) is configured as a through-going receiving opening.

13. Injection device (1) for a mixed-compression, externally ignited internal combustion engine, the injection device serving to inject a fluid, the fluid being a fuel or a mixture with a fuel, the injection device having at least one fluid dispenser according to any one of claims 1 to 12.

14. Injection device according to claim 13, characterized in that the fuel is gasoline and / or ethanol.

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