JP5274437B2 - Internal combustion engine - Google Patents

Abstract

PURPOSE: An internal combustion engine is provided to obtain recycle gas which is not diluted and has high pressure using simple and economic devices. CONSTITUTION: In an internal combustion engine, one or more recirculation gas outlets(21) of one or more cylinders(1) are arranged inside a lower cylinder domain and are formed as a cylinder wall through-part. The through-part is positioned on the upper part of a cleaning gas inflow device with a cleaning gas inlet(6). The valve apparatus is offset toward the upper part of the cleaning gas inflow device. The valve apparatus is positioned outside the cylinder.

Description

  The present invention relates to an internal combustion engine in the form of a two-cycle diesel engine having at least one cylinder. The cylinder is bounded by a reciprocating piston and has a working chamber in which scavenging gas containing oxygen and fuel can be charged, the working chamber being arranged in the lower cylinder region and at least one adjustable by the piston. A scavenging gas suction device having two scavenging gas suction parts, at least one fuel suction part disposed in the upper cylinder region, and at least one exhaust gas discharge part, and at least one from the exhaust gas discharge part The recirculation gas outlet is branched, the recirculation gas outlet is assigned to the recirculation device, and the recirculation device directly or indirectly operates the combustion gas extracted from the working chamber as the recirculation gas. Can be returned to the chamber. The invention further relates to various components and component groups for internal combustion engines of the type described above.

  This type of device is known from US Pat. In this known device, the recirculation gas outlet is arranged in the upper cylinder region next to the exhaust gas discharge and can be adjusted by a valve in the same way as this exhaust gas discharge. The opening time of this valve should start and end before the scavenging gas inlet opening adjustment. Indeed, this ensures that a recirculated gas having a relatively high pressure that is not diluted, ie not mixed with the scavenging gas, is taken off, which is desirable. However, on the other hand, due to this, the valve assigned to the recirculation gas outlet is not cooled by the passing scavenging gas, unlike the exhaust valve assigned to the exhaust gas discharge section, and therefore has high heat in continuous operation. Exposed to load.

German Publication No. 10 2005 057 207 A1

  The object of the present invention is therefore to provide an apparatus of the type mentioned at the outset by means of a simple and inexpensive means that not only a dilute and high pressure recirculation gas is obtained, but also a valve protruding into the working chamber. Is to be avoided.

  According to the present invention, this problem is solved as follows. That is, at least one recirculation gas outlet of at least one cylinder is formed as a passage through the cylinder wall, which is adjustable by a reciprocating piston arranged in the lower cylinder region, and this passage is formed in the piston. It is arranged above the scavenging gas suction device including at least one scavenging gas suction part in the direction of the compression stroke, i.e. offset upwards with respect to the scavenging gas suction device. This is solved by the fact that a valve arrangement located outside the cylinder is assigned to avoid direct backflow of recirculated gas removed from the working chamber.

  In that case, a valve in direct contact with the working chamber is advantageously avoided. This element of the valve device can advantageously be arranged in the region of the cooling environment. Nevertheless, advantageously, a combustion gas that is not diluted and has a relatively high pressure can be obtained as recirculation gas. Thus, the measures of the present invention maintain the advantages of the superordinate device and avoid its disadvantages.

  In the case of a cylinder with a scavenging gas inlet, which is arranged in the lower cylinder region and is adjustable by a piston and formed by a wall notch in the cylinder wall, the wall penetration that forms the recirculation gas outlet is suitably It arrange | positions above the scavenging gas suction part. This ensures that the piston moving downward in the expansion stroke opens the recirculation gas outlet before the scavenging gas inlet is opened. Thereby, the combustion gas which is not diluted and has a relatively high pressure can be taken out as the recirculation gas. This extraction is terminated by the valve device before the scavenging gas suction part is opened.

  Advantageous embodiments and useful variants of the superordinate measures are described in the dependent claims.

  For example, each of the one or more recirculation gas outlets can simply be configured as a wall cutout.

  The measures according to the invention also advantageously make it possible to provide a plurality of recirculation gas outlets distributed around the cylinder and advantageously configured as wall notches. This advantageously results in a large total cross-sectional area, thus achieving a large mass throughput in a short time. The recirculation gas outlet here can advantageously be configured as a recirculation gas passage suitable for connection to the assigned common peripheral channel. However, in addition or alternatively, there may be provided at least one recirculation gas outlet configured as a recirculation gas passage suitable for separate connection to the assigned channel.

  Suitably, the outside of the cylinder may be surrounded by a ring line in communication with the recirculation gas outlet forming a single recirculation gas passage. This ring line is connected to the recirculation gas container placed behind by a connecting line containing at least one valve of the valve device. This ring line allows all recirculation gas outlets to communicate with the connecting line. This simplifies the assigned valve device.

  Advantageously, the valve device comprises at least one check valve located downstream of the recirculation gas outlet. Here a particularly simple and inexpensive structural form is obtained. In particular, the check valve is a very robust element and ensures high functional reliability even in difficult operating conditions.

  A recirculation line suitably branches from the recirculation gas container. According to a particularly simple embodiment of the invention, this recirculation line opens into a scavenging gas supply device in communication with at least one scavenging gas suction. Here, the pressure of the combustion gas taken out as the recirculation gas reaches the pressure sufficient to ensure that the recirculation gas is reliably supplied to the scavenging gas supply device. Further advantageously, it is ensured that the recirculated gas is evenly distributed to the scavenging gas.

  According to another embodiment of the invention, the recirculation line can be in communication with a respective recirculation gas inlet of the cylinder. Here, recirculation gas can be supplied to the working chamber independently of the scavenging gas. This makes it easier to individually adapt the amount of recirculated gas supplied to the conditions of the individual case.

  In another advantageous embodiment of the superordinate measures, a cooling device is assigned to the wall penetration that forms the recirculation gas outlet. Thereby, the recirculation gas flow is present in the wall penetration that forms the recirculation gas outlet, so that the generated heat load is reduced. At that time, according to the first embodiment, the three-way valve can be pre-connected to the check valve arranged in the connection line between the ring line and the recirculation gas container. The third inlet of the three-way valve can be connected to a line through which scavenging gas can be charged after the check valve is closed. Here, after taking out the recirculation gas, the scavenging gas is supplied to the working chamber through the wall penetration forming the recirculation gas outlet until the wall penetration forming the recirculation gas outlet is closed by the piston. . This causes cooling. In another embodiment, in order to form a cooling device, a ring element is provided in which the coolant can be charged in the region of the wall penetration that forms the recirculation gas outlet. This ring element can be fixed to the cylinder. The coolant ensures particularly intensive cooling.

  In a further variant of the superordinate measure, the provided valve device is arranged in whole or in part in a space in which scavenging gas can be introduced. This space can advantageously be a scavenging gas box that is assigned to a plurality of cylinders and accommodates the lower cylinder region. In this way, the element of the valve device can be automatically cooled by the scavenging gas flowing around it.

  A further technical idea of the invention relates to a component in the form of a cylinder liner for an internal combustion engine of the type described above. Here, in the lower end region of the cylinder liner, there is provided a valveless recirculation gas outlet disposed adjacent to and above the scavenging gas suction portion slit formed by the wall penetration portion of the cylinder wall. This valveless recirculation gas outlet is also advantageously configured as a wall penetration. This type of cylinder liner advantageously allows the internal combustion engine to be equipped later with a recirculation gas outlet that is adjustable by a piston and formed by a wall penetration. The same applies to repair work and / or maintenance work.

  Further advantageous embodiments and suitable variants of the superordinate measures are described in the dependent claims and will become apparent from the detailed description of the examples on the basis of the drawings.

1 is a schematic view of an internal combustion engine according to the present invention for supplying recirculation gas to a scavenging gas supply device. FIG. FIG. 2 shows an alternative embodiment of FIG. 1 for supplying recirculation gas directly to the working chamber. It is a figure which shows the example for cooling the wall notch which forms a recirculation gas exit with scavenging gas. It is a figure which shows the example of the cooling device through which a refrigerant | coolant flows. It is a figure which shows the example for positioning a valve apparatus in a cooling environment. It is the schematic which shows opening adjustment of the recirculation gas exit formed of the wall notch part. FIG. 6 is a diagram of pressure and penetration parameters plotted on crankshaft angle.

  The main scope of application of the present invention is a large diesel engine, particularly a two-cycle large diesel engine, which is used in ships or stationary power generation facilities, but the present invention is not limited to this. . The underlying example of FIGS. 1 to 3 shows this type of two-cycle large diesel engine.

This type of engine typically has a plurality of cylinders, one of which is shown in FIGS. The cylinders 1 each have one cylinder liner, which is housed in an engine frame, not shown in detail here. The cylinder liner has an operating chamber 2 that functions as a combustion chamber, which is delimited by a reciprocating movement, here a piston 3 that moves up and down. The piston 3 cooperates with the crankshaft 4 via a normal transmission element. The working chamber 2 is charged with a scavenging gas containing fuel and oxygen (O ₂ ) in each working process for performing the combustion process. The gas generated by the combustion is discharged through the exhaust gas discharge unit 5. The scavenging gas is supplied to a scavenging gas suction section 6 formed by a suction slit provided in a lower region of the working chamber 2. The suction slit is formed by a passage in the cylinder wall distributed around the cylinder, that is, a notch. The scavenging gas suction part 6 is adjusted to be opened and closed by a piston 3 that moves up and down.

  The charge gas in the working chamber 2 is compressed by the piston 3. All or part of the fuel is injected into the compressed charging gas by means of an injection device 7 which is arranged in the upper region of the working chamber 2 and is schematically illustrated. The exhaust gas discharge section 5 arranged coaxially with the working chamber 2 in the upper region of the working chamber 2 can be controlled by the assigned exhaust valve 8. The exhaust valve is raised and lowered from its valve seat by an operating device assigned to release the exhaust gas. A pipe-like discharge channel 9 formed by an elbow pipe is actually connected to the exhaust gas discharge portion 5. The gas flowing out through the exhaust gas discharge part 5 and the discharge channel 9 is referred to as exhaust gas or exhaust gas.

  The discharge channels 9 of the plurality of cylinders lead to a common exhaust gas collection container 11. In order to provide scavenging gas, an exhaust gas turbo 12 is provided in the illustrated example. The exhaust gas from the exhaust gas collection container 11 is charged into the turbine 12a of the exhaust gas turbo. This is indicated by the exhaust gas line 13 exiting from the exhaust gas collection container 11. The exhaust gas turbo compressor 12b sucks air from the surroundings and feeds it to a scavenging gas collection container 14 assigned to a plurality of cylinders. An air supply line 15 emanating from the compressor 12 b is opened in the scavenging gas collection container 14, and the air supply line 15 can include an air supply cooling device 16. In addition or alternatively, a charge air cooling device arranged upstream of the compressor 12b may be provided.

  From the scavenging gas container 14, connecting pipes 17 assigned to the individual cylinders 1 branch, and this connecting pipe communicates with a scavenging gas suction part slit 6 provided on the cylinder side. For this purpose, the cylinder 1 is engaged with the assigned scavenging gas box 18 by its lower end region including the slit forming the scavenging gas suction part 6. The scavenging gas box 18 has a ring arm that surrounds the cylinder 1, a connecting pipe line 17 assigned to the ring arm is opened, and the scavenging gas suction portion 6 branches from the ring arm. The cylinder 1 is sealed against the scavenging gas box 18 at an outlet region from the scavenging gas box 18 to which the cylinder 1 is assigned. For this reason, the scavenging gas suction portion 6 cannot be accessed from the outside. The cylinder is accurately positioned at a height relative to the scavenging gas box 18. For this purpose, suitable stopper means for facilitating accurate orientation can be provided.

  A part of the combustion gas generated in the working chamber 2 by combustion is taken out from the working chamber 2 before the exhaust valve 8 is opened, and is recirculated in order to reduce the generation of NOx. That is, it is re-supplied directly or indirectly to the working chamber 2 as a recirculation gas for further combustion processes. This recycle gas should be a pure combustion gas that has not been diluted by the scavenging gas to ensure simple metering. Accordingly, the recirculation gas is taken out before the scavenging gas suction part 6 is opened. For recirculation, a recirculation device indicated generally by 20 is provided. This recirculation device can supply recirculation gas to the working chamber 2 indirectly with scavenging gas as shown in FIG. 1 or directly as shown in FIG.

  In order to derive the recirculation gas from the working chamber 2, this working chamber 2 is in each case provided with at least one recirculation gas outlet 21. The recirculation gas outlets are arranged in the lower cylinder region at a slight interval above the scavenging gas slit forming the scavenging gas suction part 6. For this purpose, one or more appropriate passages are provided in the cylinder wall, and these passages are adjusted by the piston 3 to be opened or closed. The wall penetration provided for forming the recirculation gas outlet 21 is advantageously configured as a notch through the cylinder wall, similar to the scavenging gas slit forming the scavenging gas inlet. Since a smaller amount of recirculation gas is taken out than the supplied scavenging gas, the inner total cross-sectional area of the wall notch that forms the recirculation gas outlet 21 is typically the wall notch of the cylinder that forms the scavenging gas inlet 6. It is much smaller than the inner total cross-sectional area.

  The recirculation gas outlet 21 can suitably be formed by a perforated or cast through hole. It is also conceivable to cast or weld the pipe member. The wall penetration forming the recirculation gas outlet 21 is preferably a wall notch and can be opened and closed by means of the reciprocating piston 3 as already mentioned. If it is appropriate to provide a plurality of recirculation gas outlets 21, these are preferably distributed evenly around the cylinder or partly around the cylinder and are preferably arranged at the same height. At least a portion of this recirculation gas outlet 21 can be configured to be suitable for connection to a common channel device. The recirculation gas outlet 21 configured in this manner is referred to as a recirculation gas passage. In the illustrated example, the recirculation gas passage formed in this way communicates with the ring conduit 22 that surrounds the cylinder 1 in the region to which it is assigned. This ring line is connected to the recirculation gas container 24 by a connecting line 23.

  In addition or alternatively, at least one wall penetration can be provided which forms a recirculation gas outlet 21 in the cylinder wall. This wall penetration is adapted to be connected separately to the assigned channel device and / or valve device. The recirculation gas outlet 21 configured in this manner is referred to as a recirculation gas passage.

  The recirculation gas outlet 21 can be assigned to a portion of the cylinder liner of the cylinder 1 that exists in the scavenging gas box 18 or a portion that exists outside the scavenging gas box 18, that is, above the scavenging gas box 18. . In the former case, the supply pipe line 23 or the supply pipe line assigned to each scavenging gas outlet 21 passes through the ring space of the scavenging gas box 18, and this supply pipe line is sealed against this. Yes. Furthermore, the wall penetration that forms the recirculation gas outlet 21 is preferably sealed to the inner space of the scavenging gas box 18 in the form of a wall cutout. That is, the ring line 22 and / or the assigned supply line 23 are tightly connected. This is naturally true even if the recirculation gas outlet 21 is located above the scavenging gas box 18.

  To prevent the recirculation gas taken from the working chamber 2 from flowing back directly into the working chamber 2, i.e., for example, to prevent the recirculation gas from returning from the recirculation gas container 24 back to the working chamber 2. 1, a valve device disposed in the connection pipe line 23 is assigned. In the embodiment of FIG. 1, a check valve 25 is arranged in the connection line 23 for this purpose. This check valve is opened by the pressure generated in the connecting line 23 when the recirculation gas outlet 21 forming the recirculation gas passage is opened, and after the pressure wave thus generated passes, It is configured to be closed by a reaction from the circulation gas container 24 and / or a closing spring.

  A recirculation line 26 branches from the recirculation gas container 24. The recirculation line 26 is routed through a gas processing device, which can be configured as an integral device configuration or in the form of a plurality of separate stations. The illustrated example includes a gas processing device comprising a regulating valve 27 and a purification station 28, a cooling device 29 and a liquid separation station 30. Up to this point, both embodiments according to FIGS. 1 and 2 are the same. The difference is in the course of the recirculation line 26.

  In the embodiment of FIG. 1, the recirculation line 26 opens into the scavenging gas supply device assigned to the engine. For this purpose, the recirculation line 26 opens into the scavenging gas container 14 in parallel to the air supply line 15. In the illustrated example, the recirculation line 26 opens to the air supply line 15 downstream of the air supply cooler 16.

  In the embodiment of FIG. 2, recycle gas is supplied directly to the working chamber 2 as already described above. Here, the recirculation pipe 26 is disposed after the recirculation gas container 24 connected to the cylinder-side recirculation gas outlet 21 via the connection pipe 23, and is similarly installed in the plurality of cylinders. 1 is led to the recirculation gas buffer 31 assigned to 1. From this recirculation gas buffer 31, a supply pipe line 32 assigned to the assigned cylinder 1 branches. A supply line 32 to which an adjustable control valve 33 can be assigned communicates with the recirculation gas inlet 34 on the cylinder side.

  For this purpose, it is possible to provide a recirculation gas inlet 34 which is offset in angle with respect to the recirculation gas outlet 21 which is configured as a recirculation gas passage, but arranged at the same height. This recirculation gas inlet 34 is likewise configured by a wall notch, preferably in the form of a perforated or cast hole. The recirculation gas inlet 34 also communicates with the ring line 35 assigned in the same manner as the recirculation gas passage described above, and the assigned supply line 23 is connected to the ring line 35. Yes. Of course, it can be considered that the wall notch forming the recirculation gas outlet 21 is used as the recirculation gas inlet after the recirculation gas has been taken out. In this case, the supply line 32 communicates with the ring line 22 assigned to the recirculation gas path. In this case, the control valve 33 provided in the supply line 23 must be controlled to be opened when the check valve 25 provided in the connection line 23 is just closed. The same applies to the scavenging slit and the exhaust gas discharge part 5 forming the scavenging gas suction part 6. The recirculation gas should be supplied to the working chamber 2 when the exhaust gas discharge part 5 is closed. This is to avoid leakage of recirculated gas.

  The combustion gas withdrawn from the working chamber 2 as recirculation gas is at a relatively high pressure and therefore has a relatively high energy. This is usually sufficient to return the recirculated gas directly to the cylinder 2 (FIG. 2) or indirectly (FIG. 1). The problem is that even if this energy is not enough in each case, an additional pump is provided in the recirculation circuit 26 so that this pump can be driven by the engine to which it is attached or a turbine capable of charging the exhaust gas. It will be possible.

  When taking out the recirculation gas, the flow generated at the wall penetration or wall notch that forms the recirculation gas outlet 21 can cause excessive heating of the wall region in contact with the wall penetration or wall notch. Therefore, it appears that cooling is appropriate. This cooling can be performed by a scavenging gas. This type of embodiment forms the basis of FIG. Here, a three-way valve 36 is placed in front of the check valve 25 arranged in the connection pipe line 23. The three-way inlet 37 of the three-way valve branches off from a communication pipe 17 extending from a source capable of charging a scavenging gas, in the illustrated example, from the scavenging gas container 14 to the cylinder 1. The three-way valve 36 is controlled so that the third inlet 37 is immediately opened when the post-return check valve 25 is closed, which regulates the connection line 23 leading to the recirculation gas container 24. . As a result, during the remaining opening time of the recirculation gas outlet 21, a scavenging gas having a relatively low temperature flows through the recirculation gas outlet and is led to the working chamber 2. This cools the contacting wall area as desired. In the illustrated example, the check valve 25 and the three-way valve 36 are configured as separate members. Of course, these two valves could be integrated as a combination valve with functions corresponding to the functions of both valves. Similarly, it is conceivable to replace the three-way valve 36 with a valve device having two backflow prevention functions in the pipe line 25 and the pipe line 37.

  Another cooling device that can be used simultaneously with or in place of the apparatus of FIG. 3 is shown in FIG. Here, around the cylinder 1, cooling segments 38 are provided on both side surfaces of the wall notch that forms the recirculation gas outlet 21. The cooling segment 38 is equipped with a cooling channel 39 through which the refrigerant can flow. This cooling channel can be assigned a connection 40, 41 for supplying and discharging a refrigerant, for example water.

  The elements of the valve device, here the check valve 25 and / or the three-way valve 36, which are arranged downstream of the wall penetration or wall notch forming the recirculation gas outlet 21, are suitably cooled as well. Since the valve device is appropriately arranged at a predetermined distance from the wall notch assigned to it, it is possible to cool the element by arranging the element of the valve device in a cooling space including a cold atmosphere without any problem. is there. For this purpose, the valve of the valve device can be arranged, for example, in a space containing cold scavenging gas. In the embodiment of FIG. 5, a scavenging gas container 14 is used for this purpose. For example, in the embodiment corresponding to FIG. 1, the check valve 25 can be arranged in the scavenging gas container 14. In the embodiment according to FIG. 2, in addition, a control valve 33 assigned to the scavenging gas inlet can also be arranged in the scavenging gas container 14. This type of embodiment is the basis of FIG. In the configuration according to FIG. 3, in addition, a three-way valve 36 can also be arranged in the scavenging gas container 14. Although the exhaust gas may return to the scavenging gas box 18, the scavenging gas box 18 may be used as the cooling space containing the cold scavenging gas if the first embodiment is prioritized.

  The recirculation gas outlet 21 is adjusted open and closed by the piston 3 as already described above. As can be seen from FIG. 6, the opening adjustment is performed when the uppermost piston ring 42 of the piston 3 passes through the wall penetration or wall notch forming the recirculation gas outlet 21 during the downward stroke of the piston 3. Done. In this case, the communication with the working chamber 2 is first made only through the slit between the piston 3 and the cylinder 1, whereby the flow through is attenuated. Only after the piston 3 passes through the wall notch at its upper edge, the flow through reaches its full strength. When the flow-through is damped as described above, an impact is avoided. This is further improved by providing a suction groove 43 that extends in a wedge shape upward as shown in FIG. 6 at the inner end of the wall notch formed by drilling or the like.

  In FIG. 7, the transition of the pressure p exceeding the scavenging gas pressure in the working chamber 2 with respect to the crankshaft angle (° KW) is shown by a curve a. Although not directly related to pressure, it is only qualitative, but for the crankshaft angle (° KW), the total gas flow through the recirculation gas outlet 21 is shown by curve b and the movement of the exhaust valve 8 is shown by curve c. ing. Curves d and e show when the wall notch forming the scavenging gas inlet 6 or the recirculation gas outlet 21 is fully opened. Here, the Y-axis is assigned to various sizes, with respect to the curve b to the volumetric flow through the recirculation gas outlet 21, to the stroke of the exhaust valve 8 with respect to the curve c, and to the scavenging gas suction with respect to the curves d and e. Assigned to the opening of the part 6 and the recirculation gas outlet 21. The diagram shown is therefore schematic.

  From the diagram of FIG. 7, the gas flow at the recirculation gas outlet 21 starts from a short time before the wall notch forming the recirculation gas outlet 21 is fully opened for the reason explained with reference to FIG. It can be seen that this is already over by pressure balance or by closing the valve. The scavenging gas suction part 6 is opened only after the exhaust valve is opened. Therefore, it can be seen that the gas flow passing through the wall penetration part or wall notch part forming the recirculation gas outlet 21 does not overlap with the opening time of the scavenging gas suction part 6. Furthermore, FIG. 7 shows that the pressure in the working chamber 2 is relatively high even when there is a flow through the wall penetration or wall notch forming the recirculation gas outlet 21. Thus, the recirculated gas that is removed has sufficient energy to achieve recirculation with inherent power.

  In order to be able to easily identify the component of the invention of the internal combustion engine of the invention, each component or at least one component that contacts the recirculation gas, or a component assigned to such a component May consist of or include materials that can be distinguished by trace element concentration profiles and / or material composition spectra. In this connection, it is advantageous if at least one component of the above-mentioned type comprises at least one data memory, which can be loaded and / or read without contact, in order to overcome environmental pollution. It is appropriate if detailed data on legal use in legally acceptable or prescribed systems can be maintained.

1 cylinder
2 Working chamber
3 piston
4 Crankshaft
5 Exhaust gas discharge part
6 Scavenging gas inlet
7 Injection device
8 Exhaust valve
9 Discharge channel
11 Exhaust gas collection container
12 Exhaust gas turbo
12a turbine
12b compressor
13 Exhaust gas line
14 Scavenging gas collection container
15 Air supply line
16 Air supply cooling system
17 Connection pipeline
18 Scavenging box
20 Recirculator
21 Recirculation gas outlet
22 Ring line
23 Connection pipeline, supply pipeline
24 Recirculation gas container
26 Recirculation pipeline

Claims (29)

An internal combustion engine in the form of a two-cycle diesel engine having a plurality of cylinders (1), the cylinder (1) being delimited by a reciprocating piston (3) and containing scavenging gas and fuel containing O ₂ The working chamber (2) is provided with a scavenging gas suction section (6) disposed in a lower cylinder region and adjustable by the piston (3). A gas suction device, at least one fuel suction part disposed in the upper cylinder region, and at least one exhaust gas discharge part (5), wherein at least one recirculation gas outlet from the working chamber (2) (21) is branched, the recirculation gas outlet (21) is assigned to the recirculation device (20), and the combustion taken out from the working chamber (2) by the recirculation device (20). Gas directly or between as recirculation gas In the internal combustion engine that can be returned to the working chamber (2), at least one recirculation gas outlet (21) of each cylinder (1) is arranged in the lower cylinder region and adjustable by the piston (3), It is formed as a penetrating part that penetrates the cylinder wall, and the penetrating part is arranged above the scavenging gas suction device including at least one scavenging gas suction part (6) in the direction of the compression stroke of the piston (3). Each cylinder (1) is assigned a valve device arranged outside the cylinder to prevent the recirculation gas taken out from the working chamber (2) from flowing back directly ,
The cylinder-side recirculation gas outlet (21) is assigned to the cylinder (1), and is connected to a plurality of cylinders via connection pipes (23) each including a valve of the assigned valve device. The recirculation device (20) is in communication with one recirculation gas container (24) assigned to 1) and includes at least one adjustable control valve (27) from the recirculation gas container. An internal combustion engine characterized in that the recirculation pipe (26) branches.   2. The internal combustion engine according to claim 1, wherein a plurality of recirculation gas outlets (21) distributed over at least a peripheral region of the cylinder (1) are provided.   The at least part of the plurality of recirculation gas outlets (21) distributed to the peripheral side is configured as a recirculation gas passage suitable for connection to the assigned common peripheral channel. The internal combustion engine described in 1. At least one recirculation gas outlet (21) is provided,
2. Internal combustion engine according to claim 1, characterized in that the recirculation gas outlet is configured as a recirculation gas passage suitable for separate connection to the assigned channel.   2. The internal combustion engine according to claim 1, wherein each of the recirculation gas outlets (21) is configured as a wall notch.   6. The internal combustion engine according to claim 5, wherein the recirculation gas outlet (21) is configured as a perforated hole.   6. The internal combustion engine according to claim 5, wherein a suction groove (43) directed upward is provided at an inner end of at least one wall notch forming the recirculation gas outlet (21).   8. The internal combustion engine according to claim 7, wherein an effective inner cross-sectional area of the suction groove (43) decreases from bottom to top.   The wall penetration that forms the recirculation gas outlet (21) is arranged to be in a passive state when the exhaust valve (8) is opened, and / or the assigned valve device comprises the exhaust 2. The internal combustion engine according to claim 1, wherein the internal combustion engine is configured to be in a passive state when the valve (8) is opened.   The valve device assigned to the cylinder (1) includes a check valve (25) placed behind a wall penetrating portion of the cylinder (1) forming the recirculation gas outlet (21). The internal combustion engine according to claim 1.   The outside of the cylinder (1) is completely or partially surrounded by a ring line (22) communicating with the recirculation gas outlet (21), and the ring line (22) is connected to the connection line 2. The internal combustion engine according to claim 1, wherein the internal combustion engine is connected to the recirculation gas collection container (24) by (23).   A recirculation line (26) branched from the recirculation gas collection vessel (24) is led through a recirculation gas treatment device, the recirculation gas treatment device comprising at least one purification device (28) and / or 12. The internal combustion engine according to claim 11, further comprising a cooler (29) and / or a liquid separator (30).   2. The internal combustion engine according to claim 1, wherein the recirculation pipe (26) opens to a scavenging gas supply device that communicates with at least one scavenging gas suction part (6).   The scavenging gas supply device has a scavenging gas collection container (14) that is assigned to a plurality of cylinders (1) and can be supplied with air by an air supply pipe (17), and the recirculation pipe (26) The internal combustion engine according to claim 13, wherein the internal combustion engine opens directly to the scavenging gas collection container (14) or opens to a part of an air supply line (17) disposed in front of the scavenging gas collection container. .   The recirculation pipe (26) communicates with at least one recirculation gas suction part (34) of each cylinder (1), and a control valve (33) is placed in front of the recirculation gas suction part (34). 2. The internal combustion engine according to claim 1, wherein   The control valve (33) is switchable so that the wall penetration provided to form the recirculation gas outlet (21) can be used as the recirculation gas inlet (24). The internal combustion engine according to claim 15.   The recirculation pipe (26) is led from the recirculation gas collection container (24) in the vicinity of the recirculation gas discharge part to one recirculation gas buffer (31) assigned to the plurality of cylinders (1). From the recirculation gas buffer, a supply pipe (32) connected to a ring pipe (22) or (35) allocated to one cylinder (1) and provided on the cylinder side is branched, The internal combustion engine according to claim 15 or 16, wherein one control valve (33) is arranged in each of the supply pipes.   2. The internal combustion engine according to claim 1, wherein a cooling device is assigned to a wall penetrating portion provided to form the recirculation gas outlet (21).   The valve device assigned to the cylinder (1) has a three-way valve (36) placed in front of a check valve (25), and a third inlet (37) of the three-way valve (36) 2. The internal combustion engine according to claim 1, wherein the internal combustion engine is connected to a communication line (17) extending from the scavenging gas collection container (14) to the cylinder (1).   2. The internal combustion engine according to claim 1, wherein the space for accommodating the valve device is a scavenging gas collection container (14).   16. The internal combustion engine according to claim 15, wherein at least the control valve (33) in the vicinity of the recirculation gas inlet is also disposed in a space in which the scavenging gas can be charged.   2. The internal combustion engine according to claim 1, wherein the internal combustion engine is configured as a two-cycle large diesel engine.   The cylinder liner for an internal combustion engine according to claim 1, wherein the cylinder liner has a scavenging gas suction part (6) disposed in a lower end region and formed by a wall penetration part. (21) is provided with at least one other wall penetration, which is closer to the combustion side end of the cylinder (1) than the scavenging gas inlet (6). A cylinder liner characterized by being arranged.   In the component in the form of at least one section of the cylinder liner for the internal combustion engine according to claim 1, the recirculation gas outlet (21) is disposed in the working chamber (2) in the vicinity of the scavenging gas suction portion (6). ) Functioning as at least one wall penetrating portion, and the inner end portion of the wall penetrating portion includes a suction groove (43) branched toward the working chamber (2). The effective inner cross-sectional area of the component decreases towards the working chamber (2).   A component in the form of at least one section of a cylinder liner for an internal combustion engine according to claim 1, wherein the outer cylinder is provided with at least one recirculation gas outlet (21) formed by a wall penetration. Constituent member provided in the surrounding area with connecting means for connecting at least one conduit (23) leading to at least one valve (25, 36).   The valve device for an internal combustion engine according to claim 1, wherein at least one valve (25, 36) is provided, and the valve can be directly connected to a connection means provided on the cylinder side. Having a valve device.   A component of the cylinder liner for an internal combustion engine according to claim 1, in the form of a section including a scavenging gas inlet (6) and at least one recirculation gas outlet (21), the component being a scavenging gas box (18) has means for tightly accommodating the scavenging gas inlet (6) so as to be sealed against the outside of the scavenging gas box (18), and at least one formed by the wall penetrating portion. Two recirculation gas outlets (21) are provided at the combustion side end of the cylinder (1) from the scavenging gas suction part (6) and means for sealing the scavenging gas suction part from the outside of the scavenging gas box (18). Is also disposed in the vicinity.   A component in the form of at least one section of a cylinder liner for an internal combustion engine according to claim 1, comprising a plurality of recirculation gas outlets (21) forming a recirculation gas passage, wherein the recirculation gas outlets are A component member that opens to a channel device on the peripheral side, and the channel device has connecting means for a pipe line guided to the outside.   The component in the form of at least one section of the cylinder liner for an internal combustion engine according to claim 1, further comprising stopper means for fixing the component to the scavenging gas box (18) assigned thereto. The structural member characterized by this.

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