DE102009012250A1 - Ignition device for a gas engine, equipped with this gas engine and method for operating the gas engine - Google Patents

Abstract

An ignition device for a gas engine, equipped with this gas engine and method for operating the gas engine, wherein the ignition device is an injection device for injecting a combustion gas based Zündgasstrahls in an antechamber of a cylinder of the gas engine, a Zündgasstrahl control device for releasing and inhibiting a gas supply to the injection device and a pressure control arrangement for controlling a gas pressure of the fuel gas mixture. According to the invention, the pressure control arrangement is set up to adjust the gas pressure both as a function of an engine load of the gas engine and as a function of an ignition timing of the cylinder of the gas engine.

Description

The The invention relates to an ignition device for a Gas engine, one equipped with such an ignition device Gas engine and a method of operating such a gas engine.

gas engines are internal combustion engines that use as fuel instead of liquid fuels z. B. earth, liquid, wood, Bio, landfill, mine gases or hydrogen can use. The use of gas engines z. B. operated in stationary Installations for cogeneration or marine propulsion.

For Gas engines has recently become available an ignition method, with which the gas engines with high efficiency and high performance can be operated at the same time low emissions. This ignition method is also called PGI (Performance Gas Injection) ignition method is known and based on the fact that a fuel gas mixture or ignition gas under high pressure into an antechamber of a cylinder of the gas engine is injected, wherein the ignition gas z. B. at one hot surface, such as. B. a glow plug, ignited in the antechamber. When burning the ignition gas this expands and ignites via connection openings to a main combustion chamber of the cylinder there introduced a fuel gas mixture.

The current PGI ignition method uses one Constant feed pressure for the injection of the ignition gas, wherein the amount of ignition gas only over the Duration of the ignition gas injection is regulated. Problematic it is because the operating window of the gas engine so very narrow is because the ignition timing is not sufficient to different Operating conditions adapted, such. B. be advanced can. This is due to the fact that, since the injection in the area of the largest pressure gradients on the Compression curve occurs, a small shift of the injection timing also Significant effects on the temporal mixture formation in the Antechamber has.

One unregulated injection window (ie ignition gas pressure and injection duration are constant) can therefore at earlier Zündzeitpunkten very quickly lead to a temporary lambda of less than 1 (lambda << 1) in the antechamber. As a result, the reaction in the antechamber can be very sluggish, not all of the ignition gas in the prechamber oxidizes is, so that a certain amount of remaining in the antechamber can, provided the combustion in the main combustion chamber as a result of weak Pre-reaction in the antechamber is delayed.

Further can the reaction or flame front in the antechamber at lambda smaller 1 (lambda << 1) also by one to extreme charge stratification (too rich in the range of, for example, the glow plug or the hot surface) go out. The unburned fuel gas content can, with appropriate concentration during the next compression stroke to pre-ignition and thus lead to misfiring in the main combustion chamber. Such misfires are not changed Injection boundary conditions usually "self-sustaining", d. H. the antechamber does not fire properly anymore. Such a condition may cause a shutdown or shutdown of the the entire gas engine and possibly lead to engine damage.

The current PGI ignition method is thus by its tendency to misfire in terms of altering the ignition limited. changeable Ignition timing, in particular earlier ignition timing, but would be for better efficiencies of gas engines essential, because the focus of combustion continues Top dead center (OT) could be moved.

Out DE 102 17 996 A1 a gas engine is known in which the ignition of a gas fuel-air mixture takes place on the hot surface of a glow plug in an antechamber of a cylinder of the gas engine.

In DE 196 21 297 C1 a control / regulation of the ignition oil injection of a gas engine is described.

Of the Invention is based on the object, an ignition device for a gas engine with which the ignition point can be varied in a larger adjustment range, especially to an increased extent the OT is vorverlegbar. The invention is also the task based, equipped with such an ignition gas engine and to provide a method of operating such a gas engine.

The o. g. Tasks are with an ignition device according to claim 1, a gas engine according to claim 8 or a A method according to claim 10 solved. further developments The invention are in the respective dependent claims Are defined.

According to a first aspect of the invention, there is provided an ignition device for a gas engine, wherein the ignition device comprises an injection device for injecting a fuel gas mixture based on a fuel gas mixture into a prechamber of a cylinder of the gas engine, an ignition gas control device for releasing and blocking a gas supply to the injection device and a Pressure control arrangement for controlling a Has gas pressure of the fuel gas mixture for the injection device. According to the invention, the pressure control arrangement is set up to adjust the gas pressure both as a function of an engine load of the gas engine and as a function of an ignition timing of the cylinder of the gas engine.

With the inventively designed ignition device the operating window of the gas engine can be considerably widened, so that also variable (especially earlier) ignition timing and so that higher efficiencies can be realized.

This is achieved in particular by the fact that the invention Pressure control arrangement, the gas pressure of the ignition gas both depending on the engine load of the gas engine as well depending on the ignition timing controls. Thereby can on the one hand according to the engine load sufficient gas pressure be provided for the ignition gas and on the other hand a gas pressure error resulting from an ignition timing shift (too high or too low gas pressure for the ignition gas) be compensated.

In order to can z. B. at pre-routed ignition a Überfettung of the ignition gas (ie too small a temporary Lambda) are reliably excluded. With others Words can be characterized by the fact that the ignition device keeps the lambda within the permissible or optimum range, z. B. pre-ignition and thus misfiring safely avoided. Consequently, a shutdown or stopping the gas engine and possible engine damage reliably avoided.

For the realization of the pressure control arrangement according to the invention is it possible, for. B. a difference between the according to the engine load to be set gas pressure and the corresponding the ignition timing to be set gas pressure of the ignition gas provided. This can, for example, in an electronic pressure control unit happen, which corresponding pressure signals in a differential element processed and which the gas pressure based on a difference in the limb achieved pressure signal controls or regulates.

According to one Embodiment of the invention Ignition device, the pressure control arrangement has a first Tax route over which the gas pressure in dependence from the engine load of the gas engine is adjustable, and a second Control distance over which the gas pressure in dependence adjustable from the ignition timing of the cylinder of the gas engine is.

With this embodiment of the invention Ignition device can the intended control effect, in particular Regulating effect achieved by means of simple and robust components become. For example, it is preferable according to this embodiment, two separate pressure control valves for the respective control paths use.

About that In addition, this embodiment of the invention offers the advantage that the two control lines depending on the need or operating state mutually redundant and / or complementary behavior can.

According to one another embodiment of the invention Ignition device, this also has a pilot gas reservoir on, wherein the first control path of the pressure control arrangement a first pressure control device with an input for fluid connection having a fuel gas mixture high pressure source and an output, which is fluidly connected to the ignition gas reservoir, and wherein the second control path of the pressure control arrangement, a second pressure control device with an inlet fluidly connected to the pilot gas reservoir and having an outlet for fluid communication with a fuel gas mixture low pressure source.

With this embodiment of the ignition device according to the invention Advantageously, the ignition gas reservoir as an element for subtraction of the first and the second control path used defined gas pressures. In addition, keeps the pilot gas reservoir permanent ignition gas under the current by the pressure control arrangement set ignition gas pressure before.

According to an embodiment of the invention Ignition device, the pressure control arrangement is set up, the gas pressure when increasing the engine load to a predetermined Increase engine load gas pressure and engine load gas pressure with time advance of the ignition opposite a previous ignition timing to a predetermined the ignition device to be supplied ignition gas pressure to reduce.

With this embodiment of the invention Ignition device is easily prevented that by increasing the engine load due to excessive Ignition gas pressure and thus too large ignition gas too small a temporary lambda with the associated, previously mentioned disadvantages.

According to a further embodiment of the invention Ignition device is the Zündgasstrahl control device set, an injection period of the injector in dependence from the ignition timing of the cylinder of the gas engine.

With this embodiment of the ignition device according to the invention can with a suitable tuning of a motor control in an advantageous manner an even more precise and flexible control the temporal mixture formation can be achieved in the antechamber.

According to one Embodiment of the invention Ignition device is the Zündgasstrahl control device set, an injection period of the injector in temporal Advance of the ignition timing with respect to a shorten the previous ignition timing.

In order to can be used alternatively or in advance of the ignition timing in addition to the pressure control a smaller injection quantity be effected, which is advantageous to avoid over-greasing the ignition gas in the antechamber contributes and through Redundancy increased reliability and increased Setting accuracy guaranteed.

According to one The second aspect of the invention is a gas engine with an ignition device according to one or all of the aforementioned embodiments of the Invention provided, wherein the gas engine, a motor control device which represents an engine load signal representing the engine load and an ignition timing signal representing a current ignition timing and wherein the pressure control arrangement with the engine control device is connected, so that the pressure control arrangement, the engine load signal and the ignition timing signal for adjusting the ignition gas pressure can be fed.

Of the Gas engine according to the invention has, since he with a Ignition system according to the invention according to a or all of the described embodiments is, also the respective advantages mentioned.

According to one Embodiment of the invention Gas engine is the Zündgasstrahl control device with the Motor control device connected, so that the Zündgasstrahl control device the ignition timing signal for setting the injection duration can be fed.

One in this way and by a corresponding vote of the engine control running gas engine undergoes an additional, even more precise control or regulation of the temporal mixture formation in the antechamber and thus a permanently optimal lambda. advantageously, can the Zündgasstrahl control device redundant and / or behave in addition to the pressure control arrangement. The ignition gas jet control device can advantageously together with the antechamber in one, in the cylinder head of a gas engine mountable, such. B. screwed, Use be realized.

According to one preferred implementation can ignition device and motor control advantageously provided as a unit be in the engine control all required characteristics / parameters / functions can be deposited. This is z. B. a simple and cost-effective retrofitting of conventional Gas engines possible.

According to one Third aspect of the invention are in a method of operation a gas engine according to the invention according to a or all the aforementioned embodiments of the invention a current engine load and a current ignition timing of the gas engine determines fuel gas mixture for the injector provided, wherein a first gas pressure of the fuel gas mixture from the pressure control arrangement depending on the current one Engine load is set, the first gas pressure of the fuel gas mixture from the pressure control device depending on the current one Ignition timing corrected to a second gas pressure, and the fuel gas mixture with the second gas pressure over the ignition gas jet control device controls the injector fed and the fuel gas mixture with the second Gas pressure in the form of an ignition gas jet into the prechamber injected a cylinder of the gas engine.

With the process of the invention, the operating window The gas engine can be significantly expanded, so that also variable (in particular also earlier) ignition points and so that higher efficiencies can be realized.

This is achieved in particular by the fact that in the inventive Process the pressure control arrangement, the gas pressure of the ignition gas both as a function of the engine load of the gas engine as well as depending on the ignition timing controls. This can on the one hand according to the engine load sufficient gas pressure be provided for the ignition gas and on the other hand a gas pressure error resulting from an ignition timing shift (too high or too low gas pressure for the ignition gas) be compensated.

In order to can z. B. at pre-routed ignition a Überfettung of the ignition gas (ie too small a temporary Lambda) are reliably excluded. With others Words can be characterized by the fact that the ignition device keeps the lambda within the permissible or optimum range, z. B. pre-ignition and thus misfiring safely avoided. Consequently, a shutdown or stopping the gas engine and possible engine damage reliably avoided.

According to one Embodiment of the invention Method is set by the pressure control arrangement a target value for increases the first gas pressure with increasing engine load and reduced as the engine load decreases, and is controlled by the pressure control assembly a setpoint for the second gas pressure at time advance of the current ignition timing versus one reduced previous ignition timing and temporal Relocation of the current ignition timing opposite increases the previous ignition.

With this embodiment of the method according to the invention can z. B. by applying a difference to the two setpoints in a simple and reliable way always one for the ignition optimal lambda be guaranteed.

According to one another embodiment of the invention Method controls the Zündgasstrahl control device the supply of the second gas pressure having fuel gas mixture to the injection device and thus the injection duration of the fuel gas or Zündgasgemisches depending on the current Ignition timing.

With this embodiment of the invention Method can be even more precise and advantageous manner more flexible optimal control or regulation of the temporal mixture formation in the antechamber and thus an optimal lambda can be achieved. In this case, the Zündgasstrahl control device can advantageously behave redundantly and / or in addition to the pressure control arrangement.

According to an embodiment of the invention Method is used by the Zündgasstrahl control device the supply of the second gas pressure having fuel gas mixture to the injection device with time advance of the ignition shortened compared to the previous ignition and with time retardation of the ignition timing extended over the previous ignition.

With this embodiment of the method according to the invention it is advantageously possible, alternatively or additionally for controlling by the pressure control arrangement, the Zündgasmenge to influence and thus z. B. when advancing the ignition a relative Überfettung the Zündgasgemisches to avoid.

in the The invention will be described below with reference to preferred embodiments and with reference to the accompanying figure.

1 shows a schematic partial view of a gas engine according to embodiments of the invention.

1 shows a schematic view of a gas engine, not fully shown 1 according to embodiments of the invention. The gas engine 1 has a fuel gas supply 70 , a plurality of combustion cylinders 90 (only one shown in the figure) and a motor control device 100 on.

Each combustion cylinder (hereinafter simply cylinder) 90 has an antechamber 80 with overflow openings 81 and 82 to a main burning room 91 of the cylinder 90 on. Furthermore, in each antechamber 80 a heater 83 arranged, such as in DE 102 17 996 A1 or in DE 10 2007 019 882 A1 described. Furthermore, every cylinder 90 with an ignition device 10 Mistake.

The ignition device 10 has a first pressure control valve 20 (A first pressure control device), which is designed according to this embodiment as an electrically controllable valve and which forms a first control path, a pilot gas reservoir 30 , an ignition gas jet control device 40 , an injection device 50 and a second pressure regulating valve 60 (A second pressure control device), which is formed according to this embodiment as an electrically controllable valve and which forms a second control path. The first pressure control valve 20 , the ignition gas reservoir 30 and the second pressure regulating valve 60 form a pressure control arrangement.

The fuel gas supply 70 has a low pressure region forming a fuel gas mixture low pressure source 71 , such as B. a gas tank, a high pressure compressor 72 and a high pressure reservoir forming a fuel gas mixture high pressure source 73 on. The low pressure area 71 is over a gas pipe 71a with an input (not designated) of the high pressure compressor 72 fluidly connected, wherein an output (not designated) of the high pressure compressor 72 via a gas line 72a with the high pressure reservoir 73 fluidly connected. Thus, via the high pressure compressor 72 Fuel gas mixture at high pressure in the high-pressure reservoir 73 be fed.

An input (not labeled) of the first pressure control valve 20 is over a gas pipe 73a with the high pressure reservoir 73 fluidly connected, wherein an output (not labeled) of the first pressure regulating valve 20 via a gas line 20a with the ignition gas reservoir 30 fluidly connected.

An input (not labeled) of the second pressure control valve 60 is over a gas pipe 30a with the ignition gas reservoir 30 fluidly connected, wherein an output (not labeled) of the second pressure regulating valve 60 via a gas line 60a with the low pressure area 71 fluidly connected.

The ignition gas jet control device 40 , which is designed according to this embodiment as an electrically controllable valve is on the input side via a gas line 30b with the ignition gas reservoir 30 fluidly connected and output side via a gas line 40a with the injection device designed as an injection nozzle 50 fluidly connected.

The injector 50 is on the output side in the antechamber 80 used, so that so that based on the fuel gas ignition gas jet 51 in the antechamber 80 of the cylinder 90 of the gas engine 1 is injectable. The ignition gas jet 51 will then be in the antechamber 80 by means of the heater 83 ignites and thereby triggers the ignition of one in the main combustion chamber 91 injected fuel gas mixture and thus an expansion stroke or working stroke of a piston (not shown) of the cylinder 90 out, such as In DE 102 17 996 A1 or in DE 10 2007 019 882 A1 described.

The ignition gas jet control device 40 is used to enable and disable the gas supply to the injector 50 ,

The engine control device 100 be via signal lines 101 and 102 Information about a current engine load ML, such. B. the boost pressure, or a pre-chamber pressure PV supplied.

In the engine control device 100 For example, suitable algorithms and parameters are integrated in the form of software and / or hardware that includes a relationship of engine load, spark timing, and gas pressure for injection into the prechamber 80 play.

Thus, the engine control device 100 via a data bus line 103 the first pressure control valve 20 provide an engine load signal representative of the engine load ML and via a data bus line 104 the second pressure control valve 60 provide an ignition timing signal representing a current spark timing.

Further, the ignition gas jet control device is 40 via a data bus line 105 with the engine control device 100 is connected, so that the Zündgasstrahl control device 40 by the engine control device 100 controls the supply of fuel gas mixture to the injector 50 can release and lock.

The pressure control arrangement is set up according to the invention, the gas pressure both as a function of the engine load ML of the gas engine 1 as well as in dependence of an ignition timing of the cylinder 90 of the gas engine 1 adjust. The ignition point is temporally after that in the diagram of 1 shown injection start TE.

According to a development of the described embodiment, the data bus is 105 the ignition gas jet control device 40 via a data bus connection line 106 (in 1 shown in dashed lines) with the ignition timing signal having data bus 104 connected or within the engine control device 100 supplied with the ignition timing signal.

By providing the ignition timing signal on the data bus 105 , which from the Zündgasstrahl control device 40 can be converted into a certain injection duration or opening time, is the Zündgasstrahl control device 40 set up, the injection duration of the injector 50 depending on the ignition timing of the cylinder 90 of the gas engine 1 adjust.

Now, referring to 1 Embodiments of a method according to the invention for operating the gas engine 1 described.

From the engine control device 100 becomes a current engine load ML of the gas engine 1 determined and via the data bus 103 as an engine load signal to the first pressure control valve 20 transfer.

Fuel gas mixture from the low pressure range 71 is in the high pressure compressor 72 compressed into the high pressure reservoir 73 fed and from there via the first pressure control valve 20 according to the feeding direction R1 (see the arrow R1 in FIG 1 ) the ignition gas reservoir 30 fed. The first pressure control valve 20 sets a first gas pressure P1 for the fuel gas mixture on the basis of the engine load signal.

Further, the engine control device is used 100 a current ignition timing of the cylinder 90 gas engine 1 determined and via the data bus 104 as the ignition timing signal to the second pressure control valve 60 transfer. The second pressure control valve 60 sets a second gas pressure P2 for the fuel gas mixture based on the ignition timing signal.

That is, the first gas pressure P1 of the fuel gas mixture is supplied from the second pressure regulating valve 60 corrected as a function of the current ignition timing to the second gas pressure P2. Here, if a predetermined by the Zündzeitpunk signal setpoint for the second gas pressure P2 is less than a predetermined by the engine load signal setpoint for the first gas pressure P1, excess fuel gas mixture in a discharge R2 (see the arrow R2 in FIG 1 ) over the gas line 60a to the low pressure area 71 be recycled, so that in the ignition gas reservoir 30 the second gas pressure P2 is set.

The fuel gas mixture or ignition gas having the second gas pressure P2 in the ignition gas reservoir 30 is via the gas line 30b the ignition gas jet control device 40 fed.

From the ignition gas jet control device 40 This fuel gas mixture for triggering the ignition as described above and thus the working stroke of the piston of the cylinder 90 according to one via the data bus 105 from the engine control device 100 to the ignition gas jet control device 40 transmitted injection signal of the injector 50 supplied and with the second gas pressure P2 in the form of Zündgasstrahls 51 in the antechamber 80 of the cylinder 90 of the gas engine 1 injected.

In summary, during operation of the gas engine 1 when increasing the engine load ML via a corresponding change in the setpoint value for the first gas pressure P1 at the first pressure control valve 20 the amount of the first gas pressure P1 increases and reduces as the engine load ML decreases. When the actual ignition point is advanced in time with respect to a preceding ignition point, a corresponding change in the setpoint value for the second gas pressure P2 at the second pressure regulating valve results 20 reduces the amount of the second gas pressure P2 and increases with time retransfer of the current ignition timing with respect to the previous ignition timing. D. h., Depending on the ignition timing of the first gas pressure P1 is reduced by a certain amount, and this amount can also be zero.

According to the development of the ignition device according to the invention described above, in addition, the Zündgasstrahl control device 40 the supply of the second gas pressure P2 having fuel gas mixture to the injection device 50 and thus control the duration of injection thereof depending on the current ignition timing.

In this case, the ignition gas jet control device is used 40 based on this via the data bus 105 supplied ignition timing signal, the supply of the second gas pressure P2 having fuel gas mixture to the injection device 50 shortened with time advance of the ignition with respect to the previous ignition and extended with time retransfer of the ignition with respect to the previous ignition.

1

gas engine

10

ignition device

20

first Pressure control valve

20a

gas pipe

30

Ignition gas reservoir

30a

gas pipe

30b

gas pipe

40

Zündgasstrahl controller

40a

gas pipe

50

Injector

51

Zündgasstrahl

60

second Pressure control valve

60a

gas pipe

70

Fuel gas supply

71

Low pressure area

71a

gas pipe

72

High pressure compressor

72a

gas pipe

73

High-pressure reservoir

73a

gas pipe

80

antechamber

81

overflow

82

overflow

83

heater

90

Combustion cylinder

91

Main combustion chamber

100

Motor controller

101

signal line

102

signal line

103

data bus

104

data bus

105

data bus

106

Data Bus connection line

ML

engine load

PV

prechamber

R1

feed

R2

discharge direction

P1

first gas pressure

P2

second gas pressure

TE

Start of injection

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 10217996 A1 [0008, 0046, 0052]
• - DE 19621297 C1 [0009]
• - DE 102007019882 A1 [0046, 0052]

Claims (13)

Ignition device ( 10 ) for a gas engine ( 1 ), comprising: an injection device ( 50 ) for injecting an ignition gas jet based on a fuel gas mixture ( 51 ) in an antechamber ( 80 ) of a cylinder ( 90 ) of the gas engine ( 1 ), an ignition gas jet control device ( 40 ) for releasing and blocking a gas supply to the injection device ( 50 ), and a pressure control arrangement for controlling a gas pressure of the fuel gas mixture for the injector (FIG. 50 ), wherein the pressure control arrangement is set up, the gas pressure both in dependence on an engine load (ML) of the gas engine ( 1 ) as well as in dependence on an ignition timing of the cylinder ( 90 ) of the gas engine ( 1 ). Ignition device ( 10 ) according to claim 1, wherein the pressure control arrangement comprises a first control path, via which the gas pressure in dependence on the engine load (ML) of the gas engine ( 1 ) is adjustable, and has a second control path, via which the gas pressure in dependence on the ignition timing of the cylinder ( 90 ) of the gas engine ( 1 ) is adjustable. Ignition device ( 10 ) according to claim 2, further comprising a pilot gas reservoir ( 30 ), wherein the first control path of the pressure control arrangement comprises a first pressure control device ( 20 ) with an inlet for fluid communication with a fuel gas mixture high pressure source ( 73 ) and an outlet connected to the ignition gas reservoir ( 30 ), and wherein the second control path of the pressure control arrangement comprises a second pressure control device ( 60 ) with an inlet connected to the ignition gas reservoir ( 30 ) is fluidly connected, and has an output for fluid communication with a fuel gas mixture low pressure source ( 71 ). Ignition device ( 10 ) according to one of claims 1 to 3, wherein the pressure control arrangement is adapted to increase the gas pressure with increasing the engine load (ML) to a predetermined engine load gas pressure (P1) and the engine load gas pressure (P1) with a time advance of the ignition previous ignition timing to a predetermined one of the injection device ( 50 ) to reduce the ignition timing gas pressure (P2) to be supplied. Ignition device ( 10 ) according to one of claims 1 to 4, wherein the ignition gas jet control device ( 40 ), an injection duration of the injection device ( 50 ) depending on the ignition timing of the cylinder ( 90 ) of the gas engine ( 1 ). Ignition device ( 10 ) according to claim 5, wherein the ignition gas jet control device ( 40 ), an injection duration of the injection device ( 50 ) to shorten the time of ignition of a previous ignition timing. - Gas engine ( 1 ) with an ignition device ( 10 ) according to one of claims 1 to 6, wherein the gas engine ( 1 ) a motor control device ( 100 ), which provides an engine load signal representing the engine load (ML) and an ignition timing signal representing a current ignition timing, and wherein the pressure control arrangement is provided with the engine control device (10). 100 ), so that the pressure control arrangement, the engine load signal and the ignition timing signal for adjusting the gas pressure can be fed. Gas engine ( 1 ) according to claim 8, wherein the ignition gas jet control device ( 40 ) with the engine control device ( 100 ), so that the ignition gas jet control device ( 40 ) the ignition timing signal for setting the injection duration can be fed. Method for operating a gas engine ( 1 ) according to claim 8 or 9, wherein: a current engine load (ML) and a current ignition timing of the gas engine ( 1 ), fuel gas mixture for the injection device ( 50 ), wherein a first gas pressure (P1) of the fuel gas mixture is adjusted by the pressure control arrangement in dependence on the current engine load (ML), the first gas pressure (P1) of the fuel gas mixture from the pressure control arrangement in response to the current ignition timing to a second gas pressure (P2 ) is corrected, and the fuel gas mixture with the second gas pressure (P2) via the Zündgasstrahl control device ( 40 ) controlled the injection device ( 50 ) is supplied and the fuel gas mixture with the second gas pressure (P2) in the form of a Zündgasstrahls ( 51 ) in the antechamber ( 80 ) of a cylinder ( 90 ) of the gas engine ( 1 ) is injected. The method of claim 10, wherein the pressure control arrangement a setpoint for the first gas pressure (P1) increases with increasing engine load (ML) and Reduced when reducing the engine load (ML), and wherein the pressure control arrangement a setpoint for the second gas pressure (P2) at time advance of the current ignition timing versus one reduced previous ignition timing and temporal Relocation of the current ignition timing opposite increases the previous ignition. A method according to claim 11, wherein the ignition gas jet control device ( 40 ) the supply of the second gas pressure (P2) having fuel gas mixture to the injection device ( 50 ) and thus an injection period of which controls depending on the current ignition timing. A method according to claim 12, wherein the ignition gas jet control device ( 40 ) the supply of the second gas pressure (P2) having fuel gas mixture to the injection device ( 50 ) is shortened when the ignition timing is advanced relative to the preceding ignition timing and extended with respect to the time of retardation of the ignition point with respect to the previous ignition point.