Injection device for a gas engine
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- DAIMLER TRUCK AG
- Filing Date
- 2024-06-10
- Publication Date
- 2026-04-15
AI Technical Summary
Conventional injection systems for gas engines face challenges in achieving a close fit between the distribution element and the air guide element, leading to excessive vibration and reduced robustness against pressure fluctuations, and require tolerance compensation and complex assembly processes.
The proposed injection system features a design where the gaseous fuel is discharged from the receiving space into the valve housing with an inlet opening parallel to the direction of movement, and a separate injection tube is used, allowing for a direct connection and eliminating the need for tolerance compensation, with two sealing points to ensure a secure fit and simplified assembly.
This design results in a more robust injection system with reduced vibration, allowing for individual replacement of injection valves without disassembling the distribution element, and improved assembly efficiency.
Smart Images
Figure EP2024065861_19122024_PF_FP_ABST
Abstract
Description
[0001] Injection system for a gas engine
[0002] The invention relates to an injection system for a gas engine according to the preamble of patent claims 1 and 7.
[0003] Such an injection system for at least indirectly introducing a gaseous fuel into the combustion chambers of a gas engine is, for example, already
[0004] DE 10 2017 116648 A1 is known. The injection system has a plurality of injection valves, also referred to as injectors, for at least indirectly introducing, in particular blowing in, the gaseous fuel, as well as a distribution element common to the injection valves, which is also referred to as a rail or common rail. The distribution element has a receiving chamber common to the injection valves and through which the gaseous fuel can flow, via which the injection valves can be supplied with the gaseous fuel. Each injection valve has a respective valve housing into which the gaseous fuel can be introduced from the receiving chamber and thus from the distribution element. In addition, each injection valve has a respective valve element which is movable, in particular translationally, along a direction of movement relative to the valve housing between at least one open position and a closed position.In the open position, the gaseous fuel from the valve housing can be introduced, in particular injected, at least indirectly into at least one of the combustion chambers by means of the respective injection valve. In the closed position, the fuel is not introduced, in particular injected, into the respective combustion chamber by means of the respective injection valve.
[0005] Furthermore, US Pat. No. 6,311,674 B1 discloses a fuel injection device for an internal combustion engine. EP 3 043 048 B1 discloses a method for operating a gas engine. Furthermore, JP 201944766 A discloses a valve for an internal combustion engine.
[0006] The object of the present invention is to improve an injection system of the type mentioned above.
[0007] This object is achieved by an injection system having the features of patent claim 1 and by an injection system having the features of patent claim 7. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims.
[0008] In order to improve an injection system for a gas engine, i.e., for an internal combustion engine operable using a gaseous fuel and preferably designed as a reciprocating piston engine, as specified in the preamble of patent claim 1, the invention provides that the gaseous fuel can be introduced from the receiving chamber along the direction of movement into the respective valve housing of the respective injection valve. This means, in particular, that the respective valve housing has at least or precisely one inlet opening through which the gaseous fuel flowing out of the receiving chamber can be introduced into the valve housing.The inlet opening, also referred to as the inflow opening, thus has a flow direction, also referred to as the through-flow direction, along which the inlet opening is continuous and thus can be flowed through by the gaseous fuel flowing out of the receiving chamber, through the inlet opening and thereby flows from the receiving chamber into the valve housing via the inlet opening, or is flowed through during operation of the gas engine. The through-flow direction of the inlet opening runs along the direction of movement, thus parallel to the direction of movement, or the through-flow direction coincides with the direction of movement. The direction of movement runs along a first straight line and thus extends straight, such that the valve element can be moved relative to the valve housing along the first straight line.The penetration direction extends along a second straight line and is therefore also straight, whereby the second straight line runs parallel to the first straight line and coincides with the first straight line.
[0009] Furthermore, it is provided according to the invention that a respective injection pipe, which is also referred to as an injection pipe and is designed separately from the respective injection valve and thus separately from the respective valve housing and also separately from the distribution element, is assigned to the respective injection valve. When the respective valve element is in the open position, the gaseous fuel can be introduced into the respective injection pipe from the respective valve housing along the direction of movement, such that the respective injection pipe can be flowed through by the gaseous fuel introduced into the respective injection pipe, which can be introduced, in particular injected, at least indirectly, in particular directly, into the respective combustion chamber via the respective injection pipe, also referred to as the inlet pipe.This means that the gaseous fuel flows or can flow out of the respective valve housing along the direction of movement and, in the process, flows or can flow into the respective injection pipe along the direction of movement. In other words, the respective valve housing, for example, has at least or exactly one discharge opening, also referred to as an outflow opening, through which the gaseous fuel from the receiving chamber can flow along a second flow opening, also referred to as a second flow direction. The discharge opening is thus continuous along the second flow direction and thus can be flowed through by the gaseous fuel.Thus, for example, it is provided that during operation of the gas engine, the gaseous fuel flows out of the respective valve housing along the second penetration direction and, in the process, flows through the respective discharge opening along the second penetration direction and thus flows into the respective injection pipe via the respective discharge opening along the second penetration direction, so that the gaseous fuel also flows out of the respective valve housing into the respective injection pipe along the second penetration direction, flowing out of the respective valve housing, flowing through the respective discharge opening and, in the process, flowing into the respective injection pipe via the respective discharge opening. The second penetration direction runs along the direction of movement, thus the respective second penetration direction runs parallel to the direction of movement or coincides with the direction of movement.In this way, a particularly advantageous integration of the respective injection valve, also referred to as PFI valve or PFI, into the distribution element, also referred to as rail or common rail, can be realized, in particular in such a way that an advantageous, direct connection of the respective injection valve to the respective associated injection pipe can be represented.
[0010] In particular, it can be realized that the respective injection valve has, in particular precisely, two sealing points. At a first of the respective sealing points of the respective injection valve, the respective injection valve, in particular the respective valve housing, is sealed against the distribution element, in particular by means of a respective first sealing element, which, for example, on the one hand, in particular directly, rests against the respective injection valve, in particular the respective valve housing, and on the other hand, in particular directly, rests against the distribution element.At the second sealing point, the respective injection valve, in particular the respective valve housing, is sealed, for example, against an air guiding element, in particular directly, in particular by means of a second sealing element which, for example, on the one hand, in particular directly, rests against the respective injection element, in particular on the respective valve housing, and on the other hand, in particular directly, rests against the air guiding element. Air can flow through the air guiding element, for example, and can be supplied to the respective combustion chamber by means of the air guiding element. In particular, the air is, for example, compressed air, which is referred to as charge air, so that the air element is, for example, a charge air housing.
[0011] For example, the respective injection valve, also referred to as an injector, can be inserted into the respective associated injection pipe, particularly along the direction of movement, and thus, by inserting the respective injection pipe, particularly along the direction of movement, the respective injection pipe can be connected to the respective injection pipe, so that assembly can be carried out in a particularly simple and, in particular, time- and cost-effective manner. Compared to conventional solutions, the invention eliminates the need for tolerance compensation between the distribution element and the air guide element by the respective injection valve. Thus, the invention can realize at least the following advantages:
[0012] - The distribution element can be positioned particularly close to the air guide element so that excessive vibration excitation can be avoided.
[0013] - The injection system, also known simply as a system, is more robust in the face of pressure fluctuations than conventional solutions.
[0014] Furthermore, depending on the specific implementation, the following advantages can be achieved:
[0015] - The injection valves do not have to compensate for any tolerances
[0016] - The injection valves can be replaced individually without having to dismantle the distribution element, a supply line or other valves that cannot be replaced.
[0017] In order to improve an injection system of the type mentioned in the preamble of claim 7, the invention provides that the gaseous fuel, which is, for example, hydrogen, can be introduced from the receiving chamber into the respective valve housing along an introduction direction that runs obliquely or perpendicularly to the direction of movement. This means, in particular, that, for example, the aforementioned penetration direction of the respective inlet opening of the respective valve housing runs obliquely or, preferably, perpendicularly to the direction of movement.Furthermore, the invention provides that the respective injection valve is assigned a respective injection pipe which is designed separately from the respective injection valve and in particular separately from the respective valve housing and also preferably separately from the distribution element, into which injection pipe the gaseous fuel can be introduced from the respective valve housing along the direction of movement when the respective valve element is in the open position, so that the respective injection pipe can be flowed through by the gaseous fuel introduced into the respective injection pipe, which can be introduced, in particular introduced, via the respective injection pipe at least indirectly into the respective combustion chamber. Advantages and advantageous embodiments of the injection system according to the invention according to patent claim 1 are to be regarded as advantages and advantageous embodiments of the injection system according to the invention according to patent claim 7 and vice versa.
[0018] Further advantages, features, and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective specified combinations, but also in other combinations or on their own, without departing from the scope of the invention.
[0019] The drawing shows:
[0020] Fig. 1 shows a partial schematic sectional view of a first embodiment of an injection system for at least indirectly introducing a gaseous fuel, for example in the form of hydrogen, into combustion chambers of a gas engine;
[0021] Fig. 2 shows a further schematic sectional view of the injection system according to the first embodiment; Fig. 3 shows a schematic sectional view of a second embodiment of the injection system; and
[0022] Fig. 4 shows a further schematic sectional view of the injection system according to the second embodiment.
[0023] In the figures, identical or functionally identical elements are provided with the same reference symbols.
[0024] Fig. 1 shows a detail in a schematic sectional view of a first embodiment of an injection system 10 for at least indirectly introducing, in particular blowing in, a gaseous fuel, for example in the form of hydrogen, into the combustion chambers (not visible in the figures) of a gas engine 12, which in the present case is designed as a hydrogen engine. The gas engine 12 is an internal combustion engine, also referred to as an internal combustion engine or combustion engine, which can be operated by means of the aforementioned gaseous fuel, in particular in a fired mode. In the present case, the gas engine 12 is designed as a reciprocating piston engine, and thus as a reciprocating piston machine. In particular, the respective combustion chamber is formed partly by a respective cylinder, partly by a piston accommodated in a respective translationally movable cylinder, and partly by a respective combustion chamber roof.The injection system 10 can introduce, in particular inject, the gaseous fuel indirectly into the respective combustion chamber. Thus, in the first embodiment, the injection system is designed to carry out intake manifold injection of the gaseous fuel, also referred to as intake manifold injection, and thus not to inject the gaseous fuel directly into the respective combustion chamber, but to introduce, in particular inject, it into the respective combustion chamber via at least one respective inlet duct 14 assigned to the respective combustion chamber. The respective inlet duct 14 is assigned to the respective combustion chamber and is formed, for example, by a cylinder head of the gas engine 12, the cylinder head of which forms, for example, the respective combustion chamber roof. The gas engine 12 also has an air guide element 16 through which air can flow, which is, for example, formed separately from the cylinder head and connected to the cylinder head.In particular, the air guiding element 16, in particular an air duct 18 of the air guiding element 16 through which air can flow, is fluidly connected to the respective inlet duct 14, so that the air flowing through the air duct 18 and thus the air guiding element 16 can flow out of the air duct 18 and thus also the air guiding element 16, flow into the respective inlet duct 14 and subsequently flow through the respective inlet duct 14 and be supplied to the respective combustion chamber by means of the respective inlet duct 14, thus being able to be introduced into the respective combustion chamber. In particular, the air is compressed air, which is also referred to as charge air. Thus, the air guiding element 16 is, for example, a charge air housing.
[0025] The gas engine 12 has a plurality of combustion chambers, wherein a respective injection valve 20 of the injection system 10 is assigned to each combustion chamber, in particular precisely. By means of the respective injection valve 20, also referred to as an injector, the gaseous fuel can be introduced, i.e., injected, indirectly into the respective combustion chamber. The injection system 10 also has a distribution element 22, also referred to as a rail or common rail, which is common to the injection valves 20 and which has a common receiving chamber 24 at the injection valves 20 through which the gaseous fuel can flow. The injection valves 20 can be supplied with the gaseous fuel via the receiving chamber 24, such that the gaseous fuel can flow out of the receiving chamber 24 and into the respective injection valve 20 (injector).
[0026] The respective injection valve 20 has a respective valve housing 26, which is formed separately from the distribution element 22 and into which the gaseous fuel can be introduced from the receiving chamber 24. Furthermore, the respective injection valve 20 has a respective valve element 28, which is movable, in particular translationally, along a straight line and thus along a first straight line, illustrated in Fig. 2 by a double arrow 30, relative to the respective valve housing 26 between at least one open position and a closed position. In the respective open position of the respective valve element 28, the gaseous fuel can be introduced from the respective valve housing 26 into the respective combustion chamber, to which the respective injection valve 20 is assigned, indirectly and thus in this case via the respective intake channel 14, whereby the aforementioned intake manifold injection can be carried out.In the respective open position of the respective valve element 28, the fuel is not introduced into the respective combustion chamber by means of the respective injection valve 20. For example, the respective valve housing 26 has at least or exactly one respective discharge opening, also referred to as an outflow opening. In the respective closed position of the respective valve element 28, all discharge openings of the respective valve housing 26, via whose respective discharge opening the gaseous fuel can be discharged from the respective valve housing 26 and thereby indirectly introduced into the respective combustion chamber, are closed by the respective valve element 28, i.e. blocked, so that the respective injection valve 20 does not introduce the gaseous fuel into the respective combustion chamber.In the respective open position of the respective valve element 28, the respective valve element 28 releases the discharge opening or discharge openings of the respective valve housing 26, so that the respective injection valve 20 indirectly introduces, i.e. indirectly injects, the gaseous fuel into the respective combustion chamber to which the respective injection valve 20 is assigned.
[0027] 1 and 2, the respective valve housing 26 has precisely one discharge opening, which is designated by 32. The respective discharge opening 32 of the respective valve housing 26 can be flowed through by the gaseous fuel in or along a first penetration direction illustrated in Fig. 2 by an arrow 34, which is also referred to as the first through-opening, so that in the respective open position of the respective valve element 28, the gaseous fuel flows through the respective discharge opening 32 of the respective valve housing 26 along or in the first penetration direction and thereby flows out of the respective valve housing 26.From the arrow 34 it can be seen that in the first embodiment the first penetration direction runs along the direction of movement, thus the first penetration direction runs parallel to the direction of movement or coincides with the direction of movement, which is also referred to as the axial direction of the respective injection valve 20.
[0028] Furthermore, the first embodiment provides for the gaseous fuel to be introduced from the receiving chamber 24 along the direction of movement into the respective valve housing 26, which is illustrated in Fig. 2 by an arrow 36. In particular, the arrow 36 illustrates a second penetration direction, also referred to as the second passage direction, in or along which the gaseous fuel can flow out of the receiving chamber 24 and thereby flow into the respective valve housing 26.In the first embodiment, the respective valve housing 26 has, in particular precisely, a respective inlet opening 38, also referred to as an inflow opening, through which the gaseous fuel from the receiving space 24 can flow in or along the second penetration direction illustrated by the arrow 36, so that the gaseous fuel flows out of the receiving space 24 along or in the second penetration direction, flows through the respective inlet opening 38 and thereby flows into the respective valve housing 26 via the respective inlet opening 38. It can be seen that the respective second penetration direction runs parallel to the direction of movement or coincides with the direction of movement (axial direction).
[0029] In addition, the respective injection valve 20 is assigned a respective injection pipe 40, which is formed separately from the respective injection valve 20 and separately from the respective valve housing 26 and is also referred to as an injection pipe, which is also formed separately from the distribution element 22 and separately from the air guide element 16. When the respective valve element 28 is in the respective open position, the gaseous fuel can be introduced into the respective injection pipe 40 from the respective valve housing 26 along or in the first penetration direction illustrated by the arrow 34 and thus along the direction of movement of the respective valve element 28, so that the respective injection pipe 40 can be flowed through by the gaseous fuel introduced into the respective injection pipe 40, which can be introduced, in particular injected, via the respective injection pipe 40 into the respective inlet channel 14 and thus indirectly into the respective combustion chamber.Thus, in the first embodiment, the respective injection valve 20 has a head-side, axial inflow of the gaseous fuel from the receiving chamber 24 into the respective valve housing 26. Furthermore, in the first embodiment, the respective injection valve 20 has a respective axial flow of the gaseous fuel from the respective valve housing 26 into the respective associated injection pipe (injection pipe 40).
[0030] Furthermore, the respective injection valve 20, in particular the respective valve housing 26, has two sealing points, namely a respective first sealing point S1 and a respective second sealing point S2, which are spaced apart from the respective first sealing point S1 along the direction of movement and thus in the axial direction of the respective injection valve 20. The sealing points S1 and S2 are also referred to as sealing points. At the first sealing point S1, the respective injection valve 20, in particular the respective valve housing 26, is sealed against the distribution element 22 and thus against an environment 42 of the distribution element 22, the air guide element 16, and the respective injection valve 20, in particular by means of a first sealing element 44.At the respective second sealing point S2, the respective injection valve 20, in particular the respective valve housing 26, is sealed against the air guide element 16 and thus against the environment 42, in particular by means of a respective second sealing element 46. For example, the respective sealing element 44, 46 is designed as a respective sealing ring, in particular as a respective O-ring; furthermore, it is conceivable for the respective sealing element 44, 46 to be formed from an elastomer. In the first embodiment, a respective connection piece 48 of the distribution element 22 is assigned to the respective injection valve 20, wherein at least a respective length region L1 of the respective valve housing 26 is arranged in the respective connection piece 48 assigned to the respective injection valve 20.The respective sealing point S1 is arranged in the respective length range L1, so that the respective length range L1 arranged in the respective connection piece 48 is sealed against the respective connection piece 48, in particular by means of the respective sealing element 44. Furthermore, the first embodiment provides for at least a respective second length range L2 of the respective valve housing 26 of the respective injection valve 20 to be arranged in the respective injection pipe 40 assigned to the respective injection valve 20. Furthermore, the first embodiment provides for a respective third length range L3 of the respective valve housing 26 to be arranged in the air guide element 16, also referred to as the air housing, wherein the respective third length range L3 comprises the respective second sealing point S2.It can be seen that the length range L3 is arranged between the length ranges L1 and L2 in the axial direction of the injection valve 20 and thus along the direction of movement. Furthermore, the respective length range L3 is arranged outside the respective injection pipe 40 and outside the distribution element 22.
[0031] In Fig. 2, an arrow 50 illustrates the gaseous fuel flowing through the respective valve housing 26, particularly when the respective valve element 28 is in the open position, and thus flowing, for example, from the inlet opening 38 to the outlet opening 32. Thus, for example, the arrow 36 illustrates a first flow direction of the gaseous fuel, which flows through the inlet opening 38 along or in the first flow direction and thus flows out of the receiving space 24 and flows into the respective valve housing 26. The arrow 34 illustrates a respective second flow direction of the gaseous fuel, which flows through the respective outlet opening 32 in or along the second flow direction and thus flows out of the respective valve housing 26 and flows into the respective injection pipe 40.Thus, for example, arrow 50 illustrates a third flow direction of the gaseous fuel, which, particularly in the respective open position of the respective valve element 28, flows through the respective valve housing 26 along or in the third flow direction and in particular flows from the respective inlet opening 38 to the respective outlet opening 32. Fig. 3 and 4 show a second embodiment of the injection system 10. As can be seen particularly well from Fig. 4, the second embodiment differs from the first embodiment in particular in that the gaseous fuel can be introduced into the respective valve housing from the receiving chamber 24 in or along an introduction direction running obliquely or predominantly perpendicular to the direction of movement and illustrated in Fig. 4 by arrows 52 and 54. While in Fig. 2 the arrow 36 illustrates the second penetration direction, in Fig.4 illustrates the second penetration direction by the respective arrow 54. For example, in the second embodiment, the respective valve housing 26 has at least or exactly one inlet opening, in the present case a plurality of inlet openings, wherein the respective inlet opening of the respective valve housing 26 is continuous along or in the second penetration direction and thus can be flowed through by the gaseous fuel, which can flow out of the receiving space 24 along or in the second penetration direction and thereby flow into the respective valve housing 26, as illustrated in Fig. 4 by the arrows 54.Furthermore, in the second embodiment, it is provided that a respective first longitudinal region L3 of the respective injection pipe 40 is arranged in the receiving space 24, in this case such that the respective longitudinal region L3 of the respective injection pipe 40 penetrates the receiving space 24, in particular along the direction of movement and thus in the axial direction of the respective injection valve 20, in particular completely. A respective second longitudinal region L4 of the respective valve housing 26 of the respective injection valve 20, to which the respective injection pipe 40 is assigned, is arranged in the receiving space 24 and in the respective first longitudinal region L3 of the respective injection pipe 40 and which is assigned to the respective injection valve 20.The respective inlet opening of the respective valve housing 26 is a respective first through-opening arranged in the respective second length region L4, through which the gaseous fuel from the receiving chamber 24 can be introduced into the respective valve housing 26 along the introduction direction, i.e. along the second penetration direction. In addition, the respective injection pipe 40 has at least one respective second through-opening in the respective first length region L3, through which the gaseous fuel from the receiving chamber 24 can flow, and via which the respective first through-opening of the respective valve housing 26 of the respective injection valve 20, to which the respective injection pipe 40 is assigned, can be supplied with the gaseous fuel from the receiving chamber 24.This is realized, for example, in such a way that the respective first through-opening is arranged in at least partial overlap with the respective second through-opening, so that the gaseous fuel from the receiving chamber 24 can flow through both the respective first through-opening and the respective second through-opening and thus flow into the respective valve housing 26 along or in the introduction direction. This is illustrated in Fig. 2 by the arrows 52 and 54.In particular, the respective arrow 52 illustrates the gaseous fuel flowing through the respective second through-opening from the receiving space 24, and for example, the respective arrow 54 illustrates the gaseous fuel which, coming from the respective second through-opening, flows through the respective first through-opening and thus flows along or in the introduction direction through the respective first through-opening and thus flows into the respective valve housing 26.The respective first through-opening and the respective second through-opening are arranged in the axial direction of the respective valve element 28 and thus in the axial direction of the respective injection valve 20 between two sealing elements 56 and 58 spaced apart from one another along the direction of movement and thus in the axial direction of the respective injection valve 20, to which the previous and following explanations regarding the sealing elements 44 and 46 can be applied, and vice versa. By means of the sealing elements 56 and 58, the respective second longitudinal region L4 of the respective valve housing 26 of the respective injection valve 20 is sealed against the respective first longitudinal region L3 of the respective injection pipe 40, which is assigned to the respective injection valve 20.Thus, in the second embodiment, the respective injection valve 20 has a radial inflow, i.e. perpendicular to the direction of movement, of the gaseous fuel from the receiving chamber 24 into the respective valve housing 26, and in the second embodiment, the respective injection valve 20 - as in the first embodiment - has an axial flow of the gaseous fuel from the respective valve housing 26 into the respective, associated injection pipe 40. In particular, in the second embodiment, a close position of the distribution element 22 to the air guide element 16 can be realized, so that excessive excitation can be avoided. Any tolerance compensation between the distribution element 22 and the air guide element 16 does not take place via the injection valves 20, but for example directly between the distribution element 22 and the air guide element 16.Furthermore, it is possible to replace the respective injection valve 20 individually and thus independently of the other injection valves 20, so that other components and sealing points do not have to be dismantled if only one of the injection valves 20 is replaced. List of reference symbols.
[0032] 10 Injection system
[0033] 12 gas engine
[0034] 14 Inlet channel
[0035] 16 Air guide element
[0036] 18 Air duct
[0037] 20 injection valve
[0038] 22 Distribution element
[0039] 24 recording room
[0040] 26 valve housing
[0041] 28 Valve element
[0042] 30 discharge opening
[0043] 32 discharge opening
[0044] 34 Arrow
[0045] 36 Arrow
[0046] 38 Inlet opening
[0047] 40 injection pipe
[0048] 42 Surroundings
[0049] 44 Sealing element
[0050] 46 Sealing element
[0051] 48 connecting pieces
[0052] 50 arrows
[0053] 52 Arrow
[0054] 54 Arrow
[0055] 56 Sealing element
[0056] 58 Sealing element
[0057] L1 length range
[0058] L2 length range
[0059] L3 length range
[0060] L4 length range
Claims
Patent claims 1. Injection system (10) for at least indirectly introducing a gaseous fuel into the combustion chambers of a gas engine (12), comprising a plurality of injection valves (20) for at least indirectly introducing the gaseous fuel, and comprising a distribution element (22) common to the injection valves (20), which distribution element has a receiving space (24) common to the injection valves (20) and through which the gaseous fuel can flow, via which the injection valves (20) can be supplied with the gaseous fuel, wherein the respective injection valve (20) has a respective valve housing (26) into which the gaseous fuel can be introduced from the receiving space (24), and a respective valve element (28) which can be moved along a direction of movement (30) relative to the respective valve housing (26) between at least one open position,in which the gaseous fuel from the respective valve housing (26) can be introduced at least indirectly into at least one of the combustion chambers by means of the respective injection valve (20), a closed position in which the introduction of the fuel into the respective combustion chamber by means of the respective injection valve (20) is omitted, characterized in that: - the gaseous fuel can be introduced from the receiving chamber (24) along the direction of movement (30) into the respective valve housing (26); and - a respective injection pipe (40) is assigned to the respective injection valve (20), which is designed separately from the respective injection valve (20), into which, in the open position of the respective valve element (28), the gaseous fuel can be introduced from the respective valve housing (26) along the direction of movement (30), so that the respective injection pipe (40) can be flowed through by the gaseous fuel introduced into the respective injection pipe (40), which can be introduced at least indirectly into the respective combustion chamber via the respective injection pipe (40).
2. Injection system (10) according to claim 1, characterized in that a respective connecting piece (48) of the distribution element (22) is assigned to the respective injection valve (20), wherein at least one respective length region (L1) of the respective valve housing (26) of the respective injection valve (20) is arranged in the respective connecting piece (48) assigned to the respective injection valve (20).
3. Injection system (10) according to claim 2, characterized in that the respective length region (L1) arranged in the respective connection piece (48) is sealed against the respective connection piece (48) by means of a respective sealing element (44).
4. Injection system (10) according to one of the preceding claims, characterized in that at least one respective length region (L2) of the respective valve housing of the (26) respective injection valve (20) is arranged in the respective injection pipe (40) associated with the respective injection valve (20).
5. Injection system (10) according to one of the preceding claims, characterized by an air housing (16) through which air to be supplied from the respective combustion chamber can flow, wherein at least one respective length region (L3) of the respective valve housing (26) of the respective injection valve (20) is arranged in the air housing (16).
6. Injection system (10) according to claim 5, characterized in that the respective length region (L3) arranged in the air housing (16) is sealed against the air housing (16) by means of a respective sealing element (46).
7. Injection system (10) for at least indirectly introducing a gaseous fuel into the combustion chambers of a gas engine, comprising a plurality of injection valves (20) for at least indirectly introducing the gaseous fuel, and comprising a distribution element (22) common to the injection valves (20), which has a receiving space (24) common to the injection valves (20) and through which the gaseous fuel can flow, via which the injection valves (20) can be supplied with the gaseous fuel, wherein the respective injection valve (20) has a respective valve housing (26) into which the gaseous fuel can be introduced from the receiving space (24), and a respective valve element (28) which can be moved along a direction of movement (30) relative to the respective valve housing (26) between at least one open position,in which the gaseous fuel from the respective valve housing (26) can be introduced at least indirectly into at least one of the combustion chambers by means of the respective injection valve (20), a closed position in which the introduction of the fuel into the respective combustion chamber by means of the respective injection valve (20) is omitted, characterized in that: - the gaseous fuel can be introduced from the receiving chamber (24) into the respective valve housing (26) along an introduction direction (54) extending obliquely or perpendicularly to the direction of movement (30); and - a respective injection pipe (40) formed separately from the respective injection valve (20) is assigned to the respective injection valve (20), into which pipe the gaseous fuel from the respective valve housing (26) can be introduced along the direction of movement (30) in the open position of the respective valve element (28), so that the respective injection pipe (40) can be flowed through by the gaseous fuel introduced into the respective injection pipe (40), which can be introduced at least indirectly into the respective combustion chamber via the respective injection pipe (40).
8. Injection system (10) according to claim 7, characterized in that: - a respective first length region (L3) of the respective injection pipe (40) is arranged in the receiving space (24); and - a respective second length range (L4) of the respective valve housing (26) of the respective injection valve (20), to which the respective injection pipe (40) is assigned, is arranged in the receiving space (24) and in the respective first length region (L3) of the respective injection pipe (40) which is assigned to the respective injection valve (20).
9. Injection system (10) according to claim 8, characterized in that: - the respective valve housing (26) has at least one respective first through-opening in the respective second length region (L4), via which the gaseous fuel can be introduced from the receiving space (24) along the introduction direction (54) into the respective valve housing (26); and - the respective injection pipe (40) has, in the respective first length region (L3), at least one respective second through-opening through which the gaseous fuel from the receiving space (24) can flow, via which the respective first through-opening of the respective valve housing (26) of the respective injection valve (20), to which the respective injection pipe (40) is assigned, can be supplied with the gaseous fuel from the receiving space (24).
10. Injection system (10) according to claim 9, characterized in that the respective first through-opening and the respective second through-opening are arranged along the direction of movement (30) between two sealing elements (56, 58) spaced apart from one another along the direction of movement (30), by means of which the respective second longitudinal region (L3) of the respective valve housing (26) of the respective injection valve (20) is sealed against the respective first longitudinal region (L3) of the respective injection pipe (40) which is assigned to the respective injection valve (20).