EP3615785A1

EP3615785A1 - Gas injection valve for injecting a combustible gas into an internal combustion engine, internal combustion engine having such a gas injection valve, and method for operating such an internal combustion engine

Info

Publication number: EP3615785A1
Application number: EP18716592.3A
Authority: EP
Inventors: Friedrich Köskemeier; Florian JOOS
Original assignee: MTU Friedrichshafen GmbH
Current assignee: Rolls Royce Solutions GmbH
Priority date: 2017-04-28
Filing date: 2018-04-05
Publication date: 2020-03-04
Also published as: US20200132021A1; DE102017207276B4; DE102017207276A1; WO2018197180A1; CN110537013A

Abstract

The invention relates to a gas injection valve (3) for injecting a combustible gas into an internal combustion engine (1), comprising a valve element (5), which can be moved between closed position and an open position, the open position being defined by a maximum stroke of the valve element (5). According to the invention, the maximum stroke of the valve element (5) can be adjusted during operation of the gas injection valve (3).

Description

MTU Friedrichshafen GmbH DESCRIPTION Gas injection valve for injecting a fuel gas into an internal combustion engine,

Internal combustion engine with such a gas injection valve, and method for

Operating such an internal combustion engine

The invention relates to a gas injection valve for injecting a fuel gas in a

Internal combustion engine, an internal combustion engine with such a gas injection valve and a method for operating an internal combustion engine with such a gas injection valve.

A gas injection valve of the type mentioned here is for example from the German

Publication DE 10 2014 207 182 AI known, in which case a gas injector for direct injection of a gaseous medium is disclosed in a combustion chamber of an internal combustion engine. A gas injection valve of the type discussed here can also be set up for injecting a fuel gas into a charging path of an internal combustion engine, be it by multipoint injection or else in the context of a single point injection into a one

Combustion chamber of the internal combustion engine separately associated intake manifold. Such a gas injection valve has a valve member which is between a closed position and one through a

Maximalhub the valve member certain open position is displaced, with one of the

Internal combustion engine supplied fuel gas quantity in known Gaseinblasventilen only by the choice of energization times for driving the Gaseinblasventils from the

Closed position in the open position can be varied. As an additional parameter for setting the injected fuel gas quantity, a pre-pressure upstream of the

Gas injection valve serve in a fuel gas line, in which case, however, a complex pressure control for the fuel gas line is necessary. Conventional Gaseinblasventile therefore have the disadvantage that they difficult between a no-load operation on the one hand and a

Full load operation on the other hand are adjustable and can hardly be designed for both modes suitable. Since the energizing time can not be selected arbitrarily short because otherwise no complete valve opening takes place and the valve member moves only in the ballistic range, it is often not possible to achieve a reasonably low idling speed

To allocate fuel gas quantity. In particular, when small amounts are added, a quantity spread becomes so great that the idling can not be driven clean. The Gas injection valves can not be made arbitrarily small, since they are in

Full load operation must ensure a certain maximum fuel gas flow rate.

The invention is based on the object, a gas injection valve, an internal combustion engine with such Gaseinblasventil and a method for operating such

To provide internal combustion engine, said disadvantages do not occur.

The object is achieved by providing the subject matters of the independent claims. Advantageous embodiments emerge from the subclaims.

The object is achieved in particular by providing a gas injection valve of the type mentioned above, which is characterized in that the maximum stroke of the valve member is adjustable during operation of the gas injection valve. This makes it possible, the setting of einzubasenden fuel gas quantity not or at least not only by the choice of

Make energization of Gaseinblasventils, but in particular, possibly exclusively, by adjusting the maximum stroke. Thus, in particular, an additional parameter is provided which can be used for the operation of an internal combustion engine. This not only allows a defined idling operation with small quantity dispersion, in particular by setting a minimum maximum stroke, and a full load operation especially when setting a maximum maximum stroke, but also optimizing the Bestromungszeiten for controlling the Gaseinblasventils to gas dynamic conditions in the internal combustion engine, in particular to a mixture formation in to optimize at least one combustion chamber of the internal combustion engine. Since a further parameter for setting the injected fuel gas quantity is available, can on the form in the

Fuel gas line can be omitted as a parameter for quantity control. Thus, it requires no elaborate gas pressure control more, but sufficient to use a simple fixed pressure regulator for the fuel gas line, in which in particular a constant form can be adjusted. Furthermore, aging effects, for example an increase in the flow rate of the gas injection valve over its lifetime, can be compensated, preferably compensated, by suitably setting the maximum stroke.

Under a closed position of the valve member is understood here a functional position in which a flow path for fuel gas is blocked by the gas injection valve. The

Valve member is preferably biased in the closed position and can against them Bias to be shifted to the open position. Under an open position is accordingly understood a functional position of the valve member, in which this releases a defined by the maximum stroke flow cross-section for fuel gas through the gas injection valve. The gas injection valve is in particular designed to inject fuel gas into the internal combustion engine in the open position. Under a maximum stroke is understood by a displacement mechanism for the valve member maximally bewirkbarer stroke, which may be defined for example by a stop for the valve member. To distinguish this is the fact that the valve member by its associated

Displacement mechanism is not necessarily maximum, so up to the maximum stroke, must be opened. Rather, it is also possible, the Bestromungs- or driving times for the

Gas injection valve to be chosen so that the valve member does not cover the full path to the maximum stroke and thus to the specific open position, where it can be moved, for example, in a ballistic area. By contrast, the maximum lift characterizes the opening of the gas injection valve which is as far as possible with the displacement mechanism at the momentary setting of the maximum stroke. Accordingly, under the specific open position, a position of the maximum open position at the specific, currently set maximum stroke is determined

Valve member understood, in particular, the displacement of the valve member is limited. So it is in the open position no further displacement of the valve member by the

Displacement mechanism beyond the open position possible.

The fact that the maximum stroke is adjustable during operation of the gas injection valve means, in particular, that during operation of an internal combustion engine having the gas injection valve, preferably on a time scale of less than 1 second, in particular on a time scale, which allows fully transient adjustment of the maximum stroke during operation of the internal combustion engine , is variable. The maximum stroke is therefore by no means only adjustable in the manufacture, adjustment or maintenance of the gas injection valve, but in its operation, so that it can be used as a parameter for controlling or regulating the internal combustion engine.

According to one embodiment of the invention, it is provided that the gas injection valve has a first stop against which the valve member strikes in the open position. The first stop defines the maximum stroke. The first stop is displaceable relative to a housing of the gas injection valve, which can be arranged, in particular, in a manner fixed to the engine of an internal combustion engine, in the stroke direction of the valve member, in particular in order to set the maximum stroke. In this case, the first stop is in particular between a minimum position, the corresponds to a minimum maximum stroke, and a maximum position corresponding to a maximum maximum stroke, displaceable. On the variation or setting of the first stop thus the maximum stroke can be adjusted. The valve member preferably abuts in the open position on the first stop, so that its position defines the widest possible opening of the valve and thus at the same time the open position and the maximum stroke. By the first stop can be ensured that the valve member always opens reproducible, in particular, the open position in each setting of the maximum stroke is precisely defined and reproducible. According to one embodiment of the invention it is provided that the first stop on a

Stop member is arranged, wherein the stop member between a relative to the housing of the gas injection valve spatially fixed second stop and a spatially fixed to the housing arranged third stop is displaceable. The second stop defines a minimum position for the first stop and thus at the same time the minimum maximum stroke. In particular, the third stop defines a maximum position for the first stop and, at the same time, the maximum maximum stroke. In this case, the stop member can be displaced in a defined and reproducible manner between the second stop and the third stop, preferably in a plurality of discrete or continuous positions, so correspondingly also the maximum stroke between the minimum maximum stroke and the maximum maximum stroke a plurality of discrete or continuous values can accept.

Preferably, the Gasemblasventil has a fourth stop for the valve member, wherein the fourth stop defines a sealing seat of the valve member, to which this in the

Closed position strikes. In particular, the valve member is urged in the closed position, preferably under bias against the fourth stop.

According to one embodiment of the invention, it is provided that the Gasemblasventil has a first displacement mechanism which is adapted to displace the valve member between the closed position and the open position. The first displacement mechanism is preferably designed as an electromagnetic displacement mechanism, wherein it may in particular comprise an electromagnet, which cooperates with a magnetic armature or armature. Preferably, the valve member is designed as an armature or arranged on the armature, wherein the electromagnet is formed and arranged relative to the valve member such that it moves the valve member from the closed position to the open position can shift if it is energized. This allows a simple, accurate and reproducible control of the gas injection valve, in particular by specifying

Energizing or driving times. The gas injection valve preferably has a second displacement mechanism for displacing the first stop, in particular of the stop member. The second

Displacement mechanism is preferably arranged to displace the stop member between the minimum position and the maximum position. Using the second

Displacement mechanism, it is preferably possible to adjust the maximum stroke reproducible, accurate and / or automated.

According to one embodiment of the invention, it is provided that the second

Displacement mechanism a controllable rotary drive, preferably an electric motor, which cooperates with a thread, in particular with a fine thread, for adjusting the first stop. In this way, the position of the first stopper is easy, accurate and reproducible adjustable.

According to one embodiment of the invention it is provided that the gas injection valve has a displaceable together with the stop member adjusting element having a first thread which meshes with a relative to the housing of the gas injection valve spatially fixed second thread, wherein the rotary drive is arranged and arranged to rotate the adjusting element. The first thread is preferably one

External thread. The second thread is preferably an internal thread. Preferably, both the first thread and the second thread are each fine thread. By the

Rotary drive rotatably drives the adjustment, this can mesh with its first thread with the second thread and thus cause a displacement of the stop member in the stroke direction of the valve member. This can be done very accurately and reproducibly, especially when using a fine thread. The rotary drive is in particular operatively connected to the adjusting element in order to drive this rotationally. It is preferably provided that the adjusting element is the stop member or part of the stop member. In particular, the stop member may be formed as an adjusting element and have the first thread, or it can with the

Adjustment connected or be part of the adjustment. In this way, a very simple construction of the gas injection valve is possible at the same time cost-effective, accurate and reproducible design. The object is also achieved by providing an internal combustion engine having a gas injection valve according to one of the previously described embodiments. In connection with the internal combustion engine, in particular, the advantages that have already been explained in connection with the gas injection valve.

The internal combustion engine preferably has at least one combustion chamber, particularly preferably a plurality of combustion chambers, wherein the at least one combustion chamber

Gas injection valve is assigned according to one of the embodiments described above. In particular, it is possible for each combustion chamber of a plurality of combustion chambers to be assigned in each case a separate gas injection valve, which can be controlled in particular independently of the other gas injection valves. But it is also possible that a plurality of

Combustion chambers, such as a combustion chamber group or cylinder bank, a common Gaseinblasventil is assigned.

The gas injection valve may be arranged and arranged on the internal combustion engine to realize a multi-point injection, a single-point injection or a direct injection of fuel gas. The internal combustion engine is preferably designed as a reciprocating engine. It is possible that the internal combustion engine is arranged to drive a passenger car, a truck or a commercial vehicle. In a preferred embodiment, the internal combustion engine is the drive in particular heavy land or water vehicles, such as mine vehicles, trains, the internal combustion engine in a

Locomotive or a railcar is used, or by ships. It is also possible to use the internal combustion engine to drive a defense vehicle, for example a tank. An exemplary embodiment of the internal combustion engine is preferably also stationary, for example, for stationary power supply in emergency operation,

Permanent load operation or peak load operation used, the internal combustion engine in this case preferably drives a generator. Also a stationary application of

Internal combustion engine for driving auxiliary equipment, such as fire pumps on oil rigs, is possible. Furthermore, an application of the internal combustion engine in the field of promoting fossil raw materials and in particular fuels, for example oil and / or gas, possible. Also a use of the internal combustion engine in the industrial sector or in Construction area, for example in a construction or construction machine, for example in a crane or an excavator, is possible. The internal combustion engine is preferably designed as a diesel engine, as a gasoline engine, as a gas engine for operation with natural gas, biogas, special gas or another suitable gas. In particular, when the internal combustion engine is designed as a gas engine, it is suitable for use in a cogeneration plant for stationary power generation.

The task is finally solved by a method for operating a

Internal combustion engine with a gas injection valve according to one of the previously described

Embodiments is created. This is a einzubasende amount of gas

Operating point dependent set by adjusting the maximum stroke of the valve member of the gas injection valve. At the same time are preferably drive times, that is, in particular

Energization times, for the gas injection valve operating point-dependent for an optimized

Mixture formation selected in at least one combustion chamber of the internal combustion engine. In

In connection with the method, in particular, the advantages that have already been explained in connection with the gas injection valve arise.

An operating point-dependent setting is understood in particular to mean a setting which depends on an operating point of the internal combustion engine, in particular on a load point thereof, preferably in particular on a momentary torque on the one hand and a momentary rotational speed on the other hand. Because the maximum lift of the

Gas injection valve is adjustable and thus is available as a parameter for adjusting the einzubasenden fuel gas amount, it is possible to select the activation times for the gas injection valve, in particular regardless of the einzubasende fuel gas and rather to vary in terms of optimized mixture formation in the at least one combustion chamber. In particular, a start of energization, an energization end and / or an energization duration for the gas injection valve, in particular for the first one, are called activation times

Displacement mechanism, understood. According to one embodiment of the invention, it is provided that upstream of the

Gas injection valve, in particular immediately upstream of the same, in a fuel gas line of the internal combustion engine - a time -, and in particular operating point independent - constant fuel gas pressure is set. A constant fuel gas pressure is in particular a fuel gas pressure that does not depend on a current operating point of the Internal combustion engine varies. This can be dispensed with a complex gas pressure control, but a simple fixed pressure regulator for constant control of the fuel gas pressure is sufficient.

To adjust or regulate the maximum lift and the resulting

Flow cross-section and / or static flow of Gaseinblasventils is preferably the operating point dependent, that is, in particular, depending on a current speed and a current load of the engine calculated fuel gas amount, in particular fuel gas mass used. It is possible, the maximum stroke and thus the current lifting height for the valve member taking into account the form in the fuel gas line, a measured in the charging path back pressure for the fuel gas, ie in particular a boost pressure, preferably measured in the intake manifold, and a - preferably measured - instantaneous fuel gas temperature to be determined, wherein the maximum stroke is preferably read from a valve map. In particular, a flow rate of the gas injection valve in dependence on the maximum lift and the instantaneous fuel gas density can be stored in the valve map. From the operating point dependent required

Fuel gas quantity, the flow to be adjusted and thus also the adjusted stroke height - that is, the maximum stroke - are calculated taking into account the aforementioned parameters. According to one embodiment of the invention, it is provided that an internal combustion engine is operated with a plurality of combustion chambers. In this case, each combustion chamber or each combustion chamber group of a plurality of combustion chamber groups, such as cylinder banks, a - preferably separate and in particular independently of the other Gaseinblasventilen controllable - Gaseinblasventil assigned. In this case, the activation times and / or the maximum lift for each gas injection valve is / are set separately. In this way, the aforementioned parameters, that is to say in particular the activation times and / or the maximum lift, can be used to equalize the different combustion chambers of the internal combustion engine.

In particular, it is possible by averaging the burning time of all combustion chambers and corresponding correction of each gas injection valve to this mean value

To achieve combustion chamber equality. Thus, a particularly smooth and balanced engine running for the internal combustion engine can be realized.

The fuel gas valve proposed here, the internal combustion engine and the method

allow in particular improved engine operation with reduced emissions, especially at idle, under full load and also in load application as well as in other areas of the engine map of the internal combustion engine. It results in an improved

Cross-country stability, especially because wear effects can be adjusted out by adjusting the maximum stroke. A complex gas pressure control can be omitted, but it is sufficient to provide a fixed pressure regulator for controlling the fuel gas inlet pressure. For the at least one Gasemblasventil the internal combustion engine optimal Bestromungszeiten can be adjusted in terms of a suitable running of the internal combustion engine, and this both at idle and under full load. The description of the Gaseinblasventils and the internal combustion engine on the one hand and the method on the other hand are to be understood complementary to each other. Features of the

Gas injection valve and the internal combustion engine, which are explained explicitly or implicitly in connection with the method, are preferably individually or combined with each other features of a preferred embodiment of the Gaseinblasventils and / or

Internal combustion engine. Process steps which are explained explicitly or implicitly in connection with the gas-blast valve or the internal combustion engine are preferably individually or combined with one another Features of a preferred embodiment of the method. This is characterized by at least one method step, which is due to at least one feature of an inventive or preferred embodiment of the gas injection valve or the internal combustion engine. The Gasemblasventil and / or the internal combustion engine preferably draws / characterized by at least one feature, which is due to at least one step of a preferred or preferred embodiment of the method according to the invention. The invention will be explained in more detail below with reference to the drawing. The single figure shows a schematic representation of an embodiment of an internal combustion engine with a Gasemblasventil.

The single FIGURE shows a schematic representation of an embodiment of a

It has a valve member 5 which is displaceable between a closed position in which a flow path for fuel gas is closed by the Gasemblasventil 3, and a by a maximum lift of the

Valve member 5 certain open position, in which a flow path for fuel gas is released by the gas injection valve 3. It is provided that the maximum stroke of the valve member 5 in the operation of the gas injection valve 3 is adjustable. In this way, the adjustment of the maximum stroke of the valve member 5 can be used as a parameter for controlling the quantity of fuel gas to be injected into the internal combustion engine 1. This allows in particular a choice of Bestromungs- or Ansteuerzeiten for the gas injection valve 3, regardless of the einzubasenden fuel gas quantity, so that they can be selected in particular optimized for a mixture formation in a combustion chamber 7 of the internal combustion engine 1. In addition, can be dispensed with a complicated control of a form for the fuel gas, but it is possible to set a constant, in particular operating point independent fuel gas pressure upstream of the Gaseinblasventils 3, since this is no longer needed as a parameter for the flow control. Furthermore, aging effects of a charging path 9 of the internal combustion engine 1 and / or the gas injection valve 3 can be compensated by varying the maximum stroke. The gas injection valve 3 has a first stop 11, on which the valve member 5 in the

Open position strikes. In this case, the first stop 11 defines the maximum stroke, wherein it can be displaced relative to a housing 13 of the gas injection valve 3 that can be arranged, in particular, fixed to the engine 1 in the stroke direction of the valve member 5. In particular, the first stop 11 is between a minimum position shown in the figure, which defines a minimum maximum stroke, and a maximum position, which a maximum

Maximalhub defined for the valve member 5, displaceable.

The first stop 11 is arranged on a stop member 15, which is displaceable between a fixed relative to the housing 13 arranged second stop 17 and a fixed relative to the housing 13 arranged fixed third stop 19. In this case, the second stop 17 and the third stop 19 are preferably arranged on the housing 13. The second

Stop 17 defines the minimum position for the first stop 11, wherein the third stop 19 defines the maximum position for the first stop 11. The gas injection valve 3 also has a fourth stop 21, which is preferably designed as a sealing seat for the valve member 5.

The gas injection valve 3 here has a first displacement mechanism 23 for displacing the valve member 5 between the closed position and the open position, and a second Displacement mechanism 25 for displacing the first stop 11, in particular of the stop member 15, between the minimum position and the maximum position. The first displacement mechanism 23 is preferably formed electromagnetically, wherein it has in particular an electromagnet 27, wherein the electromagnet 27 is preferably arranged on the stop member 15 or formed as a stop member 15 and in particular with the stop member 15 is displaced, and an armature 29 which on the valve member 5 is arranged. It is also possible that the valve member 5 is formed as an anchor 29. The armature is in particular a magnet armature, which is displaceable by the electromagnet 27. If the solenoid 27 is energized, the armature 29 and thus the valve member 5 is raised starting from the functional position shown in the figure in the direction of the electromagnet 27, preferably until the valve member 5 abuts against the first stop 11. Thus, the first stopper 11 defines a maximum stroke position of the first stopper mechanism 11 achievable with the first displacement mechanism 23 at a current position of the first stopper 11

Valve member 5 and thus the maximum stroke and the open position.

The second displacement mechanism 25 preferably has a controllable rotary drive 31, which is preferably designed as an electric motor, wherein the rotary drive 31 with a thread 33, which is designed in particular as a fine thread, cooperates to adjust the first stop 11.

In this case, the gas injection valve 3 in particular a displaceable together with the stop member 15 adjustment 35, which a first thread 33.1, here namely a

External thread, which, with a relative to the housing 13 spatially arranged, second thread 33.2, which is here in particular formed as an internal thread, meshes, wherein the rotary drive 31 is arranged and arranged to drive the adjusting element 35 rotatably. Here, the stop member 15 is formed as adjusting 35. Alternatively, it is also possible that the adjusting element 35 is arranged on the stop member 15 or part of the stop member 15. If the adjusting element 35 is rotated by the rotary drive 31, its first thread 33.1 cooperates with the second thread 33.2, so that the stop member 15 is displaced together with the first stop 11 in the lifting direction of the valve member 5. Here, the unit can be displaced from the rotary drive 31 and the stop member 15 between the second stop 17 and the third stop 19, whereby the first stop 11 between the Minimum position and the maximum position is shifted. In this way, the maximum stroke of the gas injection valve 3 can be adjusted by activating the rotary drive 31. This can in particular during the operation of the gas injection valve 3 and thus also the

Internal combustion engine 1, wherein an adjustment of the maximum stroke is preferably possible on a time scale of less than 1 second. Thus, a fully transient operation of the internal combustion engine 1 with variation of the maximum stroke can be ensured.

In the context of a method for operating the internal combustion engine 1 with the gas injection valve 3, a gas volume of the fuel gas to be injected is dependent on the operating point, that is, depending on a current operating point of the internal combustion engine 1, by adjusting the

Maximalhubs the valve member 5 is set. At the same time, activation times or energization times for the gas injection valve 3 are preferably selected depending on the operating point, that is to say as a function of an instantaneous operating point of the internal combustion engine 1 with a view to optimized mixture formation in the at least one combustion chamber 7 of the internal combustion engine 1. It is preferably provided that the upstream of the gas injection valve 3 in a

Fuel gas supply line 37 of the internal combustion engine 1, a constant fuel gas pressure is set, which therefore in particular not in dependence on an operating point of the

Internal combustion engine 1 is varied. Preferably, an internal combustion engine 1 is operated with a plurality of combustion chambers 7, wherein each combustion chamber 7 or each combustion chamber group of combustion chambers 7 is associated with a particular separate gas injection valve 3. In this case, the activation times or energization times for the gas injection valves 3 and / or the maximum stroke of the valve member 5 are set separately for each gas injection valve 3 of the internal combustion engine 1. In this way, in particular a combustion chamber equalization for the internal combustion engine 1 can be performed.

The gas injection valve 3 is preferably designed for Mehrpunkteindüsung or

Einzelpunkteindüsung in the charging path 9 of the internal combustion engine 1. It is also possible that the gas injection valve 3 is arranged for direct injection of fuel gas into the combustion chamber. 7

Overall, it turns out that with the gas injection valve 3 proposed here, the

Internal combustion engine 1 and the method for operating the internal combustion engine 1

improved engine running with reduced emissions, especially with improved Idle mode, unrestricted full load operation and improved load application is realized. It also improves the cross-country stability of both

Gas injection valve 3 and the internal combustion engine 1 reaches, wherein wear of the charging path 9 and / or the Gaseinblasventils 3 can be adjusted out by suitable adjustment of the maximum stroke. Due to the maximum lift as an additional parameter for the

Volume control of einzubasenden fuel gas amount can be set optimal Bestromungsdauer for the gas injection valve 3 in the entire operating range of the internal combustion engine 1, wherein the Bestromungszeiten can differ operating point dependent. Optimal energization times can be selected in each case for an idling operation and for a full-load operation of the internal combustion engine 1.

Claims

1. Gas injection valve (3) for injecting a fuel gas in an internal combustion engine (1), comprising - a valve member (5), the between a closed position and one by a

Maximalhub the valve member (5) certain open position is displaced,

characterized in that the maximum stroke of the valve member (5) during operation of the

Gas injection valve (3) is adjustable.

2. Gas injection valve (3) according to claim 1, characterized in that the Gaseinblasventil (3) has a first stop (11) against which the valve member (5) abuts in the open position, wherein the first stop (11) defines the maximum stroke, and wherein the first stop (11) relative to a housing (13) of the gas injection valve (3) in the stroke direction of the valve member (5) is displaced.

3. Gas injection valve (3) according to any one of the preceding claims, characterized in that the first stop (11) on a stop member (15) is arranged, wherein the

Stop member (15) between a relative to the housing (13) of the Gaseinblasventils (3) spatially fixed second stop (17) and a relative to the housing (13) spatially fixed third stop (19) is displaceable, wherein the second stop (17 ) one

Minimum position for the first stop (11) and the third stop (19) defines a maximum position for the first stop (11).

4. Gas injection valve (3) according to any one of the preceding claims, characterized in that the gas injection valve (3) has a first displacement mechanism (23) for displacing the

Valve member (5) between the closed position and the open position and a second displacement mechanism (25) for displacing the first stop (11).

5. Gas injection valve (3) according to any one of the preceding claims, characterized in that the second displacement mechanism (25) has a controllable rotary drive (31) which cooperates with a thread (33) for adjusting the first stop (11).

6. Gas injection valve (3) according to any one of the preceding claims, characterized in that the gas injection valve (3) one together with the stop member (15) displaceable

Adjusting element (35) which has a first thread (33.1) which meshes with a relative to the housing (13) of the gas injection valve (3) spatially fixed second thread (33.2), wherein the rotary drive (31) is arranged and arranged, to rotate the adjusting element (35).

7. Internal combustion engine (1), with a gas injection valve (3) according to one of claims 1 to 6.

8. A method for operating an internal combustion engine (1) with a gas injection valve (3) according to one of claims 1 to 6, wherein

- A einzubasende fuel gas amount operating point dependent by adjusting the

Maximalhubs the valve member (5) of the gas injection valve (3) is adjusted, and preferably

- Ansteuerzeiten for the gas injection valve (3) depending on the operating point for an optimized mixture formation in at least one combustion chamber (7) of the internal combustion engine (1) can be selected.

9. The method according to claim 8, characterized in that upstream of the

Gas injection valve (3) in a fuel gas supply line (37) of the internal combustion engine (1) a constant fuel gas pressure is adjusted.

10. The method according to any one of claims 8 and 9, characterized in that a

Internal combustion engine (1) with a plurality of combustion chambers (7) is operated, wherein each combustion chamber (7) or each combustion chamber group of a plurality of combustion chamber groups of the internal combustion engine (1) is associated with a Gaseinblasventil (3)

- The drive times, and / or

- the maximum stroke

is set separately for each gas injection valve (3).