EP2220341A2

EP2220341A2 - Axial piston engine and method for operating an axial piston engine

Info

Publication number: EP2220341A2
Application number: EP08849887A
Authority: EP
Inventors: Ulrich Rohs
Original assignee: GETAS Gesellschaft fuer Themodynamische Antriebssysteme mbH
Current assignee: GETAS Gesellschaft fuer Themodynamische Antriebssysteme mbH
Priority date: 2007-11-12
Filing date: 2008-11-10
Publication date: 2010-08-25
Anticipated expiration: 2028-11-10
Also published as: DE112008003003A5; US9879635B2; EP2711499A8; CN101932792B; US20100258065A1; EP2711500B1; KR101514859B1; RU2490488C2; CN101932792A; EP2711500A3; WO2009062473A3; BRPI0817366A2; JP2011503412A; KR20100093554A; EP2711499A2; EP2711499A3; ES2711318T3; US20180128204A1; CN103334833A; CN103334833B

Abstract

To improve the efficiency of an axial piston engine, the invention proposes an axial piston engine with a combustion chamber which operates with two-stage combustion.

Description

Axial piston motor and method for operating an axial piston motor

[01] The invention relates to an axial piston engine with a combustion chamber. In particular, the invention also relates to an axial piston engine with a combustion chamber which is isolated by means of a ceramic assembly. Likewise, the invention relates to an axial piston engine with continuous combustion, in which from a combustion chamber effluent working fluid is fed via at least one firing channel successively at least two working cylinders. Finally, the invention also relates to a method for operating an axial piston motor.

Generic axial piston motors and methods are disclosed, for example, in EP 1 035 310 A2 and are therefore already known from the prior art.

[03] It is an object of the present invention to provide an axial piston motor with optimized efficiency.

[04] As a first solution, there is proposed an axial-piston engine having a combustion chamber that operates with two-stage combustion. Characterized in that a combustion chamber is provided, which is constructed so that it can work with a two-stage combustion, existing in a fuel chemical energy can be used much more effectively on the axial piston motor according to the invention or converted into usable energy, whereby the efficiency of the axial piston motor improves is.

[05] For this purpose, it is structurally particularly advantageous if the combustion chamber has two areas, in which a fuel and / or air is injected. Here, the fuel and the air can be injected together or separately into the different areas of the combustion chamber.

[06] Particularly in this context, a preferred embodiment provides that the combustion chamber has a first region in which a portion of the combustion is introduced and in which a treatment nozzle injects a corresponding amount of fuel. Through the treatment nozzle, in which fuel is already mixed with a very small proportion of combustion air and thus processed for combustion, and the complementary supply of combustion air, the combustion process is particularly effectively initiated, whereby the combustion of the fuel can take place more effectively overall.

[07] In particular, it is advantageous if the combustion air fraction, which is introduced as an additional fraction into the first region, is less than 50% of the total combustion air, preferably less than 15%, in particular less than 10%. If the combustion air fraction is within such limits, this already makes it possible to improve the combustion of the fuel via the two-stage combustion.

[08] In particular, a fuel can be injected particularly well into the combustion chamber of the axial-piston engine if the axial-piston engine has a main nozzle and a secondary nozzle. Depending on the configuration of the combustion of the fuel or of a corresponding fuel-air mixture, a fuel-air mixture could also be injected into the combustion chamber by means of such a main nozzle. The main nozzle thus ensures that a substantial proportion of fuel in a certain preferred direction enters the combustion chamber of the axial piston engine, while by the auxiliary nozzle, which may be formed, for example, as a preparation nozzle, a certain amount of fuel or on a fuel-air mixture in enters the combustion chamber, which can be used for supporting purposes, such as an afterburner, a treatment or a temperature control.

[09] Especially in this context, the object of the invention is also achieved by an axial piston motor with a combustion chamber, in which fuel via a main nozzle and fuel via a preparation nozzle, which is mixed with air or is injectable. Advantageously, by means of such a treatment nozzle, a virtually arbitrary fuel-air mixture can be injected into the combustion chamber, while ideally only fuel is injected by means of the main nozzle. Alone through this division of the efficiency of an axial piston engine is already improved. If it is advantageous for an application, more than one treatment nozzle can be provided. The In particular, this advantage also applies independently of the use of a two-stage combustion or of a combustion chamber having two regions.

[10] If the main nozzle is aligned parallel to a main combustion direction in the combustion chamber, the fuel can be injected so particularly well into the combustion chamber that it can ignite and burn exceptionally effectively. In particular, an ignited or combusted fuel-air mixture with higher kinetic energy can pass through the entire combustion chamber, further out through firing channels out of the combustion chamber and into working cylinder of the axial piston engine, especially if the fuel from the main nozzle out in the main combustion direction in the Combustion chamber is injected. In this way, the fuel or the fuel-air mixture can be quickly fed to the areas of the axial piston motor, in which it should then do its job, such as the cylinders.

It is also advantageous if the main nozzle is aligned coaxially to an axis of symmetry of the combustion chamber, which is parallel to the main combustion direction in the combustion chamber. If the main nozzle is located centrally, ie centrally, on the axis of symmetry of the combustion chamber, a corresponding, essentially combustion takes place, so that the combustion gases can then also be taken out symmetrically from the combustion chamber for further use, even if further components are supplied by a secondary or conditioning nozzle but then they can not penetrate that much.

An advantageous embodiment provides that the treatment nozzle is aligned at an angle to the main nozzle. As a result, both the main nozzle and the treatment nozzle can be structurally placed and connected to the combustion chamber in a small space.

Furthermore, it is advantageous if the jet direction of the treatment nozzle intersects the jet direction of the main nozzle, whereby a fuel injected into the combustion chamber through the main nozzle and a fuel-air mixture injected into the combustion chamber through the treatment nozzle, for example in the region of an antechamber Processing chamber can already be particularly well mixed and mixed with each other. [14] In order to be able to advantageously introduce both the fuel from the main nozzle and the fuel-air mixture from the preparation nozzle into the combustion chamber, it is advantageous if the axial-piston engine has a treatment chamber into which both a main nozzle and a treatment nozzle are directed and which opens to the main combustion chamber. In this way, it is always ensured that the fuel from the main nozzle and the fuel-air mixture from the treatment nozzle can be thoroughly mixed thoroughly before they reach the second region of the combustion chamber, for example into a main combustion chamber of the combustion chamber.

In order to initiate an already preheated fuel into the combustion chamber, it is advantageous if the axial piston engine has a treatment chamber, in which the exhaust gas or a fuel-air mixture introduced from a treatment nozzle and in which without air supply fuel from a Main jet is injected.

[16] Furthermore, for additional or alternative solution to the object of the present invention, a further axial piston motor with a combustion chamber and a combustion chamber upstream treatment chamber proposed in which via a main nozzle fuel is fed, which is heated in the processing chamber, preferably already thermally decomposed, becomes. Already by means of such a treatment chamber, known axial piston motors can advantageously be developed further, since a fuel which could at least already be heated in the treatment chamber can be burned more effectively. In particular, a sufficient and advantageous two-stage combustion can already be realized and permanently ensured on an axial piston engine.

[17] It should be noted that the object of the invention is accordingly also achieved by a method for operating an axial-piston engine, in which fuel is decomposed in a first step and then brought into contact with process air for combustion. Advantageously, the decomposed fuel can react more effectively with the process air, so that the combustion process is correspondingly more effective.

Further, it is advantageous if the decomposition of the fuel takes place thermally. A heat or heat required for this purpose can be easily generated and provided directly on the axial piston motor. On the other hand, it is understood that other decomposition zess, such as elktrolytische or kathalytische processes cumulatively or alternatively in a corresponding processing chamber can be used.

It is understood that such heat for the thermal decomposition of the fuel can be generated in different ways. If the thermal energy for the decomposition is provided by a treatment flame, the fuel can be thermally decomposed on the axial piston motor in a particularly simple manner and, in particular, by utilizing the technology already used anyway for the combustion of the fuel.

[20] If the conditioning flame is generated by means of a fuel-air mixture, then the conditioning flame on the axial-piston engine can be structurally produced and provided in a simple manner.

If the proportion of fuel, which is brought by the fuel-air mixture in the combustion chamber or in the treatment chamber, less than 10% of the total amount of fuel, which is introduced into the combustion chamber, the axial piston motor can be operated particularly fuel-efficient In this way, only a minimum of fuel is used for the preparation of the combustion, namely the preparatory decomposition, while the remainder of the fuel is available for the performance of the desired work. In particular, it should also be taken into account that the fuel used for the treatment is ultimately just as energetically available to the process and used accordingly for the process. However, the two-step approach ensures that the decomposition of the fuel used for work has already taken place or is well advanced until it ignites, which increases the effectiveness of the overall process.

In addition, it is proposed that in the processing chamber opens a treatment nozzle, via which the fuel can be heated in the processing chamber. In particular, if combustion air or a combustion air / fuel mixture is introduced into the treatment chamber by means of the treatment nozzle, the fuel likewise introduced into the treatment chamber via a main nozzle can be heated particularly simply in the region of the treatment chamber, preferably even thermally decomposed, and supplied to the main combustion chamber , Depending on the specific process management can hereby since combustion air / fuel mixture or other gas mixture or gas conducted from the treatment nozzle into the processing chamber are metered in such a way that sufficient temperatures prevail in the processing chamber to ensure treatment of the remaining fuel, for example thermal decomposition.

[23] In order to be able to introduce or inject a fuel-air mixture into the combustion chamber of the axial-piston engine in a particularly lossless and correspondingly advantageous manner, it is advantageous if the processing chamber is aligned parallel to a main combustion direction in the combustion chamber. This leads in particular to the fact that the flow of combustion gases is uniform and can be distributed uniformly according to different cylinders.

[24] When the processing chamber is aligned coaxially with an axis of symmetry of the combustion chamber parallel to the main combustion direction in the combustion chamber, the flow of combustion gases can be made uniform.

[25] The air-fuel mixture from the Aufbungskungskammer can be particularly advantageously mixed with combustion air in the main combustion chamber when the treatment chamber has a smaller diameter than the combustion chamber. Here, the main combustion chamber should be in volume only as much larger as the treatment chamber, that an undisturbed stream from the processing chamber can be formed with complementary supply of combustion air through the main combustion chamber in the cylinder to prevent unnecessary expansion in the main combustion chamber, which in itself would lead to losses, since the work should actually be done in de cylinder.

[26] It is understood that such a processing chamber can be designed in many ways. Ideally, the treatment chamber comprises a pre-chamber and a main chamber. For example, while the main nozzle and / or the treatment nozzle can open into the prechamber of the treatment chamber, an ignition and / or pre-combustion may take place in the main chamber of the treatment chamber.

[27] Preferably discharges both the main nozzle and the treatment nozzle in the prechamber in the processing chamber, which can in the processing chamber discontinued mixtures are already in the main chamber of the treatment chamber exceptionally well prepared.

[28] Both the main nozzle and the preparation nozzle can advantageously open into the processing chamber or into the antechamber of the processing chamber in a small space if the pre-chamber of the Aufbreitungskammer is conical and widens towards the main chamber. Here, the fact is taken into account that the amount of gas increases by the addition of the volume flows from the main nozzle and the treatment nozzle.

[29] Not only in this context, an advantageous further embodiment accordingly provides that the antechamber widens towards the main chamber. By means of such an extension, a mixing of the discontinued by the main nozzle and the preparation nozzle mixtures can be further improved.

In addition, it is advantageous if the jet direction of the treatment nozzle and the jet direction of the main nozzle intersect in the prechamber. In this way, a particularly good and intimate mixing of the given by the main nozzle on the one hand and the conditioning nozzle on the other hand blended mixtures can be achieved.

[31] A preferred embodiment provides that a quantity of air corresponding to the quantity of fuel introduced into the main combustion chamber through a main nozzle is introduced into the main combustion chamber behind a treatment chamber. In this way, it is ensured that a treatment process of the fuel in the processing chamber can be performed reliably without already combustion of the abandoned by the main nozzle of the main combustion chamber air.

[32] In particular in this context, it is advantageous if the axial piston motor has a separate air supply to the combustion chamber. The separate air supply can be provided in a structurally particularly simple manner if a perforated ring for an air supply has a nozzle, preferably a conditioning nozzle. However, the air supply can also be realized by separate channels, which open into corresponding openings or separate nozzles in a combustion chamber. [33] It should be emphasized that the terms "before" and "behind" refer respectively to the main combustion direction and to the flow direction through the nozzles or chambers. Likewise, it should be emphasized that in the present context in each case of combustion air or air is mentioned, which is to require the combustion of the fuel. On the other hand, it should be understood that for all fuels that exothermically react with a second component under a redox reaction, the present invention can be advantageously reacted accordingly.

Another object of the present invention is to provide an axial piston engine having a combustion chamber which is insulated by a ceramic assembly, the ceramic assembly being air cooled. If the ceramic assembly is air-cooled, the thermal budget of the combustion chamber of the axial piston motor can be controlled much better. In this respect, thereby the life of the axial piston motor can be improved. In particular, the air heated in this way can be used for combustion, whereby the efficiency, in deviation from corresponding water-cooled combustion chambers, can be further increased. It is also easier to control air cooling in the region of the combustion chamber, in particular a ceramic combustion chamber.

Especially in this context, the object of the invention is further achieved by an axial piston motor with a combustion chamber, which is insulated by a ceramic assembly, the ceramic assembly is tubular and surrounded by a tube with a profiling, preferably with a thread , Such a profiling can achieve an increase in surface area, as a result of which cooling of the ceramic assembly can be substantially improved. In particular, this can also increase the service life of the axial piston motor, since in this case the thermal budget of the axial piston motor can be improved.

An improved embodiment in this respect provides that the profiled tube is profiled on both sides, for simplicity on both sides is provided with a thread. As a result, the profiled tube with a larger contact surface can be in contact with the ceramic combustion chamber of the axial piston motor and, if necessary, even be screwed on. the. A thread also has the advantage that it can ensure a uniform air flow in a structurally simple manner.

Also, the object of the invention is achieved independently of the other features of the present invention according to the Understanding of an axial piston engine, in which compressed process air for cooling, in particular for cooling a combustion chamber, is used. For example, this compressed process air can flow around the profiled tube described above and additionally cool it. In addition, such a compressed process air at the axial piston motor to a sufficient extent already exist, so that it can be readily used advantageously for cooling the axial piston motor.

[38] A cooling effect can be further improved if the process air is given up water. If suitable means for supplying water into a process air of the axial piston motor are provided on the axial piston motor, water can also be added to the process air in an easily metered manner.

[39] Not only directly around the combustion chamber, the process air can be perfectly used for cooling. In particular, the water can cumulatively or alternatively be given up before or during the compression of the process air or of a fuel-air mixture. There then remains enough time to heat the process air enriched with water in order to maximize the efficiency of the axial piston, for which purpose in particular waste heat from the combustion process, for example from cooling processes, can be used accordingly. The residual heat of the exhaust gas can be used accordingly.

[40] Advantageously, the water is injected into a compression cylinder, whereby a uniform distribution of the water can be ensured.

[41] If, in addition, the amount of water is controlled proportionally to the fuel quantity, the water can also be used to advantage in the combustion process. In that regard, an injection of an excessive amount of water can be avoided, so that the risk can be reduced that the axial piston motor is cooled too much at a lower workload. In particular, the water can also be used as a reagent and / or catalyst in the combustion process in order, for example, to carry out a chemical reaction. to ensure desired exhaust components. The amount of water required thereby corresponds advantageously to the amount of fuel converted in each case.

[42] Depending on the specific process control, the water may also be split thermally before it reaches the main combustion chamber. This can for example also be done in the processing chamber. On the other hand, the splitting can also take place chemically or catalytically and / or elsewhere, for example in feed channels or in the immediate vicinity of inlet openings in the combustion chamber.

Cumulatively, the object of the invention of an axial piston engine with a continuous combustion is achieved in which from a combustion chamber effluent working fluid is fed through at least one firing channel successively at least two working cylinders, each working cylinder, a firing channel is provided, the closed via a control piston and can be opened. By means of the control piston, the shot channels between a combustion chamber and working cylinders on the one hand particularly tightly closed and on the other hand very quickly reopened, which is not possible, for example, by rotary valves or rotating shot channels, which are already known from the prior art. In this respect, this alone the efficiency of an axial piston motor can be improved. Such control piston can also structurally very simple and robust seal a shot channel and release again, whereby the life of the axial piston motor can be further increased.

[44] For example, the control piston can perform a substantially radially directed lifting movement in order to be able to release a firing channel again. In a preferred embodiment, the control piston carry out a substantially radially directed lifting movement, so that axial space can be saved. If a control piston alternatively carries out a substantially axially directed lifting movement, that is to say a substantially axially directed lifting movement, cooling of the control piston can be realized more simply. In this respect, to choose between these solutions depending on the specific implementation, with a between axial and radial stroke movement, ie at an angle, can be selected, which, however, structurally usually leads to more complex and therefore more costly results. [45] In this context, another preferred embodiment provides that the control piston is water-cooled, whereby overheating can be avoided particularly effectively, since the control pistons in the firing channel are exposed to particularly high temperatures.

[46] In a preferred embodiment, the control pistons can be driven hydraulically or pneumatically, so that very fast shutter speeds or sequences of movements of the pistons can be realized. Alternatively, the control piston is desmodromisch driven. In the case of a desmodromic drive, the control piston can always close a firing channel even at high speeds reliably and exceptionally tight.

[47] If the control piston is driven via a curved path, it can be accelerated and decelerated particularly quickly. In particular, a desmodromic drive can be implemented particularly well in practice.

[48] If a piston cover of the control piston has a larger diameter than the closing channel, the heat load of the control piston can be reduced much more advantageously.

A particularly simple attachment and guidance of the control piston can be realized in particular by sliding blocks or plain bearings, whereby the control piston can be secured against rotation in a preferred embodiment at the same time. An exceptionally good seal with respect to the control piston can be achieved if the control piston carries a control piston ring. If the control piston ring has a slot, the sealing function of the control piston ring can be further improved since the control piston ring can better adapt to the structural conditions, in particular to a control piston cylinder, in particular when it is pressurized.

[50] Moreover, it is advantageous if the control piston ring is secured against rotation, as this can improve the sealing function on the control piston again.

[51] Further advantages, objects and features of the present invention will be described with reference to the following attached drawing in which, by way of example, a first embodiment of an axial piston motor is shown. [52] In the drawing show:

Figure 1 shows schematically an axial piston motor in longitudinal section;

2 shows schematically the axial piston engine according to the figure 1 in cross section along the

Line IM; 3 shows schematically an enlarged view of the firing channel ring from the figure

1; Figure 4 schematically shows a longitudinal section through a control piston as an alternative to the

Control piston according to Figures 1 and 2; and Figure 5 shows schematically a cross section through the control piston of Figure 4 along the line V-V.

[53] The axial piston engine 1 shown in FIG. 1 has a combustion chamber 2 in which a fuel-air mixture can be ignited and burnt. Advantageously, the axial piston engine 1 operates in this case with a two-stage combustion. For this purpose, the combustion chamber 2 has a first region 3 and a second region 4, into which fuel and / or air can be injected. In particular, in the first region in FIG. 3, a portion of a combustion air of the axial-piston engine 1 can be introduced, wherein in this embodiment the proportion of the combustion air can be set smaller than 15% of the total combustion air.

[54] Through the two areas 3 and 4, the combustion chamber 2 of the axial-piston engine 1 can be subdivided into a treatment chamber 5 and a main combustion chamber 6.

The treatment chamber 5 has a smaller diameter than the main combustion chamber 6, wherein the treatment chamber 5 is additionally divided into an antechamber 7 and into a main chamber 8. The antechamber 7 is conical in this case and expands towards the main chamber 8.

[56] To the treatment chamber 5, in particular to the antechamber 7 of the treatment chamber 5, on the one hand a main nozzle 9 and on the other hand a treatment nozzle 10 is connected. By means of the main nozzle 9 and the treatment nozzle 10, a fuel can be introduced into the combustion chamber 2, wherein the fuel which is injected by means of the treatment nozzle 10 is already mixed with air or is. [57] The main nozzle 9 is aligned parallel to a main combustion direction 11 in the combustion chamber 2 on the axial piston motor 1. In addition, the main nozzle 9 is coaxial with an axis of symmetry 12 of the combustion chamber 2, which is parallel to the main combustion direction 11 in the combustion chamber 2, aligned.

The treatment nozzle 10 is aligned with respect to the main nozzle 9 at an angle 13. In this respect, a jet direction 14 of the treatment nozzle 10 intersects with a jet direction 15 of the main nozzle 9 at an intersection point 16.

[59] The processing chamber 5, in which both the main nozzle 9 and the treatment nozzle 10 are directed, opens to the main combustion chamber 6. In the processing chamber 5 fuel from the main nozzle 9 is injected without further air supply. This is already preheated in the treatment chamber 5, ideally thermally decomposed.

For this purpose, the quantity of air corresponding to the quantity of fuel flowing through the main nozzle 9 is introduced into the main combustion chamber 6 behind a distribution chamber 5, for which purpose a separate air supply 17 is provided, which essentially discharges into the main combustion chamber 6. The separate air supply 17 is for this purpose connected to a process air supply 18, wherein from the first another air supply 19 can be supplied with air, which in this case supplies a hole ring 20 with air. The hole ring 20 is in this case associated with the treatment nozzle 10, so that the fuel injected with the treatment nozzle 10 can additionally be injected with process air into the prechamber 7 of the treatment chamber 5.

[61] The combustion chamber 2, in particular the main combustion chamber 6 of the combustion chamber 2, has a ceramic assembly 21, which is air-cooled. The ceramic assembly 21 in this case comprises a ceramic combustion chamber wall 22 which is surrounded by a profiled tube 23. To this profiled tube 23 extends a cooling air chamber 24, which is operatively connected via a cooling air chamber supply 25 with the process air supply 18.

[62] Furthermore, the axial piston motor 1 has known working cylinders 30 (see in particular FIG. 2) in which working pistons 31 can be moved back and forth. [63] By means of the working piston 31, compressor pistons 32 of the axial-piston engine 1 are driven, which can be moved correspondingly in suitable compressor cylinders 33 of the axial-piston engine 1. The working piston 31 are in each case by means of a connecting rod 34 with the compressor piston 32 in connection, between the piston 31 and the connecting rod 34 and between the compressor piston 32 and the connecting rod 34 each have a Pleuellaufrad 35 is arranged. In each case enclosed between two connecting-rod wheels 35 is a drive cam track 36, which is guided on a drive cam track carrier 37. Opposite the combustion chamber 2, the axial piston engine 1 has a drive shaft 38, by means of which the power generated by the axial piston motor 1 can be delivered. In known manner, in the compressor piston 32, a compression of the process air, possibly including injected water, which possibly leads to an additional cooling, whereby, however, if necessary, the exhaust gases can be cooled much deeper in a heat exchanger when the process air over a preheated such heat exchanger to be performed to the combustion chamber 2, wherein the process air by contact with other assemblies of the axial piston motor 1, which must be cooled, further preheated or heated, as already described above. The compressed and heated in this way process air is then abandoned the combustion chamber 2 in the manner already explained.

Each of the working cylinder 30 is connected via a firing channel 39 with the combustion chamber 2 of the axial piston motor 1, so that the fuel-air mixture from the combustion chamber 2 via the firing channel 39 into the working cylinder 30 and there can drive the working piston 31.

In this respect, the effluent from the combustion chamber 2 working medium via at least one firing channel 39 successively at least two working cylinders 30 are supplied, each working cylinder 30, a firing channel 39 is provided, which can be closed and opened via a control piston 40. Thus, the number of control pistons 40 of the axial piston motor 1 is predetermined by the number of working cylinders 30.

A closure of the firing channel 39 takes place here substantially via the control piston 40 also with its piston cover 41. The control piston 40 is driven by means of a control piston cam track 42, wherein a spacer 43 for the Steuerkolvekurven- web 42 is provided to the drive shaft 38, which also serves in particular a thermal decoupling. In the present embodiment, the control piston 40 can perform a substantially axially directed stroke 44. Each control piston 40 is for this purpose by means not unnatural sliding blocks, which are mounted in the control piston cam track 42, guided, wherein the sliding blocks each have a safety cam which runs in an unnumbered guide groove back and forth and prevents rotation of the control piston 40.

[67] Since the control piston 40 comes into contact with the hot working medium from the combustion chamber 2 in the region of the firing channel 39, it is advantageous if the control piston 40 is water-cooled. For this purpose, the axial piston motor 1, in particular in the region of the control piston 40, a water cooling 45, the water cooling 45 inner cooling channels 46, middle cooling channels 47 and outer cooling channels 48 includes. Cooled so well, the control piston 40 can be reliably moved in a corresponding control piston cylinder 49.

[68] The firing channels 39 and the control pistons 40 can be provided in a constructionally simple manner on the axial piston motor 1 if the axial piston motor 1 has a firing channel ring 50, as illustrated in particular in FIG.

In this case, the firing channel ring 50 has a central axis 51, around which, in particular, the parts of the working cylinders 30 and the control piston cylinders 49 of the axial piston motor 1 are arranged concentrically. Between each working cylinder 30 and control piston cylinder 49, a firing channel 39 is provided, each firing channel 39 being spatially connected to a recess 52 (see FIG. 3) of a combustion chamber bottom 53 (see FIG. 1) of the combustion chamber 2 of the axial piston motor 1. Thus, the working fluid from the combustion chamber 2 out through the shot channels 39 into the working cylinder 30 and perform work there, by means of which also the compressor cylinder 33 of the axial piston motor 1 can be moved. It is understood that, depending on the specific embodiment, coatings and inserts may still be provided in order to protect the firing channel ring 50 or its material from direct contact with corrosive combustion products or at excessively high temperatures.

[70] The exemplary control piston 60 shown by way of example in FIGS. 4 and 5 has an impeller 61 for the control piston cam track 37 of the axial piston motor 1. The impeller 61 is provided as well as a ball 62 formed as a rotation lock 63 on a piston cap 41 facing away from the end 64 of the control piston 60. The ball 62 may advantageously serve in the present case as a longitudinal guide of the control piston 60. In addition, the control piston 60 comprises a piston ring 65, which sits directly below the piston cover 41. The piston ring 65 is secured to the control piston 60 by means of a piston ring lock 66. Between the piston ring 65 and the ball 62, a pressure equalization 67 is still provided for the control piston 60.

LIST OF REFERENCE NUMBERS

1 axial piston motor 34 connecting rod

2 combustion chamber 35 Pleuellaufrad

3 first region 36 drive curve path

4 second area 37 drive track carrier

5 processing chamber 38 drive shaft

6 main combustion chamber 39 shot channel

7 prechamber 40 control piston

8 Main chamber 41 Piston cover of the control piston

9 Main jet 42 Control piston curve

10 preparation nozzle 43 spacers for control piston

11 Main burn direction

12 symmetry axis 44 axially directed lifting movement

13 angles 45 water cooling

14 jet direction of the treatment nozzle 46 internal cooling channels

15 jet direction of the main nozzle 47 middle cooling channels

16 intersection 48 outer cooling channels

17 separate air supply 49 spool cylinders

18 Process air supply 50 Shot channel ring

19 additional air supply 51 center axis

20 hole wreath 52 recess

21 ceramic assembly 53 combustion chamber bottom

22 ceramic combustion chamber wall 60 alternative control piston

23 profiled tube 61 impeller

24 cooling air chamber 62 ball

25 Cooling air chamber supply 63 Anti-rotation device

30 working cylinder 64 opposite end

31 working piston 65 piston ring

32 Compressor piston 66 Piston ring safety

33 Compressor cylinder 67 Pressure compensation

Claims

claims:

1. Axial piston engine (1) with a combustion chamber (2), which operates with a two-stage combustion.

2. Axial piston engine (1) according to claim 1, characterized in that the combustion chamber (2) has two regions (3, 4), in which a fuel and / or air is injected.

3. Axial piston engine (1) according to claim 1 and 2, characterized in that the combustion chamber (2) has a first region (3), in which a portion of the combustion air is introduced, and in which a treatment nozzle (10) a corresponding amount of fuel injects.

4. Axial piston engine (1) according to claim 3, characterized in that the combustion air entant less than 50% of the total combustion air, preferably less than 15%, in particular less than 10%, is.

5. axial piston motor (1) according to one of claims 1 to 4, characterized by a main nozzle (9) and a sub-nozzle, for example, a treatment nozzle (10).

6. Axial piston engine (1) with a combustion chamber (2), in particular according to one of the preceding claims, in which via a main nozzle (9) and fuel via a treatment nozzle (10) fuel, which is mixed with air or is injectable.

7. Axialkolbenmotor (1) according to claim 5 or 6, characterized in that the

Main nozzle (9) is aligned parallel to a main combustion direction (11) in the combustion chamber (2).

8. Axial piston engine (1) according to claim 7, characterized in that the main nozzle (9) is aligned coaxially to an axis of symmetry (12) of the combustion chamber (2), which is parallel to the main combustion direction (11) in the combustion chamber (2).

9. axial piston motor (1) according to one of claims 6 to 8, characterized in that a treatment nozzle (10) at an angle (13) to the main nozzle (9) is aligned.

10. Axial piston engine (1) according to claim 9, characterized in that the jet direction (14) of the treatment nozzle (10) intersects the jet direction (15) of the main nozzle (9).

11. Axial piston engine (1) according to any one of the preceding claims, characterized by a treatment chamber (5), in which both a main nozzle (9) and a treatment nozzle (10) are directed and which opens to a main combustion chamber (6).

12. Axialkolbenmotor (1) according to any one of the preceding claims, characterized by a treatment chamber (5) into which the exhaust gas or a fuel-air mixture from a treatment nozzle (10) and introduced in which without air supply fuel from a main nozzle (9 ) is injected.

13. Axial piston engine (1) with a combustion chamber (2, 6) and a combustion chamber (2, 6) upstream treatment chamber (5), in which via a main nozzle (9) fuel is fed, which heated in the processing chamber (5), preferably thermally decomposed, is.

14. Axial piston engine (1) according to claim 12 or 13, characterized in that in the processing chamber (5) a treatment nozzle (10) opens, via which the

Fuel in the treatment chamber (5) can be heated.

15. Axial piston engine (1) according to one of claims 11 to 14, characterized in that the processing chamber (5) is aligned parallel to a main combustion direction (11) in the combustion chamber (2).

16. axial piston motor (1) according to claim 15, characterized in that the processing chamber (5) coaxial with an axis of symmetry (12) of the combustion chamber (2, 6) is aligned, which is parallel to the main combustion direction (11) in the combustion chamber (2, 6).

17. Axial piston engine (1) according to one of claims 11 to 16, characterized in that the treatment chamber (5) has a smaller diameter than the combustion chamber (2, 6).

18. Axial piston engine (1) according to one of claims 11 to 17, characterized in that the treatment chamber (5) comprises an antechamber (7) and a main chamber (8).

19. Axial piston engine (1) according to claim 18, characterized in that the jet direction (14) of a treatment nozzle (10) and the jet direction (15) of

Cut main nozzle (9) in prechamber (7).

20. Axial piston engine (1) according to claim 18 or 19, characterized in that the prechamber (7) widens to the main chamber (8).

21. Axial piston engine (1) according to any one of the preceding claims, characterized in that a through a main nozzle (9) into the main combustion chamber (6) introduced amount of fuel corresponding amount of air in the main combustion chamber (6) behind a treatment chamber (7) is initiated.

22. Axial piston engine (1) according to one of the preceding claims, characterized by a separate air supply (17) to the combustion chamber (2).

23. Axial piston engine (1) according to one of the preceding claims, characterized in that one of the two nozzles (9, 10), preferably a treatment nozzle ■ (10), a hole ring (20) for an air supply (19).

24. Axial piston engine (1) with a combustion chamber (2) which is isolated by means of a ceramic assembly (21), characterized in that the ceramic assembly (21) is air-cooled.

25. Axial piston engine (1) with a combustion chamber (2), which is isolated by means of a ceramic assembly (21), characterized in that the ceramic assembly (21) formed like a tube and (23) with a profiling, preferably with a Thread is surrounded.

26. Axial piston engine (1) according to claim 25, characterized in that the profiled tube (23) is profiled on both sides, preferably provided on both sides with a thread.

27. Axial piston engine (1), characterized in that the compressed process air for

Cooling, in particular for cooling a combustion chamber (2), is used.

28. Axial piston engine (1), characterized in that the process air is given up water.

29. Axial piston engine (1) according to claim 28, characterized in that the water is abandoned before or during the compression.

30. Axial piston engine (1) according to claim 29, characterized in that the water is injected into a compression cylinder (33).

31. Axial piston engine (1) according to any one of claims 28 to 30, characterized in that the amount of water is controlled in proportion to the amount of fuel.

32. Axial piston engine (1) with continuous combustion, wherein from a combustion chamber (2) effluent working medium via at least one firing channel (39) successively at least two working cylinders (30) is fed, characterized in that each working cylinder (30) has a firing channel (39 ) is provided, which can be closed and opened via a control piston (40; 60).

33. Axial piston engine (1) according to claim 32, characterized in that the control piston (40; 60) executes a substantially radially directed lifting movement.

34. Axial piston engine (1) according to claim 32, characterized in that the control piston (40; 60) carries out a substantially axially directed stroke movement (44).

35. Axial piston engine (1) according to one of claims 32 to 34, characterized in that the control piston (40; 60) is water-cooled.

36. Axial piston engine (1) according to one of claims 32 to 35, characterized in that the control piston (40; 60) is desmodromisch driven.

37. Axial piston engine (1) according to one of claims 32 to 36, characterized in that the control piston (40; 60) is driven via a curved path.

38. Axial piston engine (1) according to one of claims 32 to 37, characterized in that a piston cover (41) of the control piston (40; 60) has a larger diameter than the firing channel (39).

39. Axial piston engine (1) according to one of claims 32 to 38, characterized in that the control piston (40; 60) is secured against rotation.

40. Axial piston engine (1) according to one of claims 32 to 39, characterized in that the control piston (40, 60) carries a control piston ring (65).

41. Axial piston engine (1) according to claim 40, characterized in that the control piston ring (65) has a slot.

42. Axial piston engine (1) according to claim 40 or 41, characterized in that the control piston ring (65) is rotationally secured.

43. A method for operating an axial-piston engine (1), characterized in that the fuel is decomposed in a first step and then brought into contact with the process air for combustion.

44. The method according to claim 43, characterized in that the decomposition of the fuel takes place thermally.

45. The method according to claim 44, characterized in that the thermal energy is provided for the decomposition by a treatment flame.

46. The method according to claim 45, characterized in that the conditioning flame is generated via a fuel-air mixture.

47. The method according to claim 46, characterized in that the proportion of fuel brought into the combustion chamber (2) or into the treatment chamber (5) by the fuel-air mixture is less than 10% of the total fuel quantity is introduced into the combustion chamber (2).