JP3766558B2 - Internal combustion engine with a diesel supercharger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes at least one compressor for supplying air to a cylinder air inlet and a supply air flow path between the compressor and the cylinder air inlet before being supplied to the cylinder. With a diesel supercharger comprising at least one air cooler for cooling the air and at least one water mist collector having at least one row of baffle plates that divide the main air flow of the charge air into partial flows An internal combustion engine, wherein each baffle plate on one side has an active baffle surface extending obliquely with respect to the flow direction of the main air flow, and is disposed at an end of the active baffle surface. The present invention relates to an internal combustion engine equipped with a diesel supercharger, comprising a first groove-shaped droplet collector having a droplet inlet.
[0002]
[Prior art]
This type of internal combustion engine is known from the construction of commercial engines that have been pressurized with a compressor for many years. In the case of a four-stroke engine, the expression air supply is sufficient, but in the context of the present invention, in the case of a two-stroke engine, the term air supply is used hereinafter to include both scavenging and air supply Then it should be understood. As a result of pressurizing this charge, the temperature rises and it is necessary to cool the air before it is supplied to the engine cylinder.
[0003]
As a result of this cooling, water condenses from the air. When exhausted from the cooler, the air contains droplets that deposit in the lubricating oil on the inner surface of the cylinder, resulting in reduced lubrication between the piston ring and the cylinder, or This drop must be removed before feeding the cylinder, as it can render it inoperable.
[0004]
In order to cope with this, a known water mist (water fog) collector is provided with at least two rows of baffle plates, and the active baffle surface of the baffle plates changes the air flow direction. This is because the air flow collides with the baffle plate surface and is deflected to one side.
[0005]
When this air is deflected, the droplets in the air will continue to flow straight in the direction of travel, so that the holding power of the air holding the droplets is lost and the droplets fall on the baffle plate. To deposit. This air flow then pulls water towards the end of the active baffle surface where it flows into the grooved droplet collector.
[0006]
[Problems to be solved by the invention]
Known water mist collectors have proved not to be efficient enough, especially in more modern engines with high charge pressure and large amounts of air. Attempts have been made to arrange a large number of baffle plates in a continuous row, but this will cause the air pressure to drop significantly in the water mist collector passage, which is a signifi cant. However, it has an adverse effect on engine efficiency.
[0007]
[Means for Solving the Problems]
An object of the present invention is to provide an internal combustion engine with a supercharger in which the degree of wear of the cylinder and the piston ring is reduced without causing an excessive pressure drop after the air cooler as a result of the deposition of moisture from the supply air Is to provide.
[0008]
In view of this, the engine according to the present invention has a second groove-shaped droplet collector disposed at a location where the first groove-shaped droplet collector directly extends (extends), and the second groove-shaped droplet collector is disposed. The droplet inlet of the droplet collector is located on the opposite side of the baffle plate, and the downstream end of the first droplet collector sets the upstream limit of the droplet inlet of the second grooved droplet collector It is characterized by.
[0009]
Each of the baffle plates has an active baffle surface. As described above, the baffle surface extends obliquely with respect to the flow direction of the main air flow, and the air flow flowing on one side (front side) of the baffle plate collides with the air flow. Force the flow direction to change. Each of the baffle plates has an opposite baffle surface that sets a boundary from an adjacent passage in the adjacent air flow on the opposite side (rear side) of the baffle plate. Looking at one of the partial air streams, this air stream flows between two baffle plates extending parallel to each other. When the air flow impinges on the active baffle surface of one baffle plate, the air flow is flush with the opposite baffle surface on the second baffle plate. The air flow does not impinge on this part of the opposite baffle surface, i.e. the part shielded from incoming air, but water still adheres to the surface.
[0010]
Place the second drop collector on the extension of the first drop collector and the drop inlet of the second drop collector on the opposite side of the baffle plate to adhere to both sides of the baffle plate Moistened water is immediately and continuously discharged. This has been found to have the effect of significantly increasing the efficiency of the baffle plates in a row. The efficiency in this case means the ratio of the removed water. That is, an efficiency of 20% means that 20% of the amount of condensed water in the incoming air is removed and discharged. Since this efficiency decreases as the engine load increases, this efficiency depends on the air flow rate, that is, the engine load. Under the same operating conditions, a row baffle plate of a conventional design is less than 25% efficient, while a row baffle plate designed according to the present invention exhibits an efficiency of 40-50%.
[0011]
This significant improvement is achieved without any significant increase in the pressure drop across the water mist collector. The reason why this improvement is achieved cannot be explained exactly, but because the air swirls without flowing along a fine layered path, so that the droplets adhere to both sides of the passage. Conceivable. Also, the droplets are released from the baffle plate at the end of the active baffle surface, scatter and adhere themselves to the opposite surface of the baffle plate at the opposite side of the passage, after which water is Can also be collected by another droplet collector. It is important to achieve the desired effect that the partial air flow does not change direction significantly before it reaches the droplet inlet of the second droplet collector than if it collides with the active baffle surface. That is. This change in direction leads to the generation of a vortex that causes the droplet to detach from the baffle plate and be taken into the air.
[0012]
The first and second droplet collectors are disposed directly within each other in the extending (extending) portions. This has the advantage that the flow resistance is minimized because the second droplet collector is completely hidden behind the first droplet collector.
[0013]
By rounding the downstream end of the first droplet collector so that the water on the baffle surface flows through the droplet inlet before the water stops contacting the baffle surface, It is possible to improve the function of the droplet collector to discharge water. As an alternative to this design, the downstream limit at the inlet of the drop can be somewhat protruded into the air flow, so that the droplet exiting the upstream limit collides with the inner surface of the downstream limit. Flow into the droplet collector.
[0014]
The second groove-shaped droplet collector, and preferably also the first droplet collector, has a long shape with an internal cavity, the internal cavity having a length equal to at least twice the width of the cavity. Therefore, it is preferable to extend from the droplet inlet in the flow direction of the supply air. For one alternative design where the length and width of the cavities are approximately equal, a narrow droplet collector can better hold water until it is discharged from the outlet at the bottom of the droplet collector. . In the vicinity of the droplet inlet, an air vortex is often generated inside the cavity. Within the cavity, water tends to accumulate near the bottom of the cavity furthest from the inlet, and the long shape of the cavity moves the water away from the vortex, so that the water swirls through the droplet inlet It becomes more difficult. This long shape also provides a reasonably large volume for the droplet collector. This makes it more difficult for the droplet collector to fill up and prevents water from overflowing from the droplet inlet.
[0015]
In one embodiment, the droplet inlet of the second droplet collector has at least one passage width, preferably 1 downstream from the droplet inlet in the first droplet collector in the same row of baffle plates. .5 to 4 times the passage width apart. First, this distance between the two droplet inlets provides a space with a reasonably large internal volume for the droplet collector without excessively limiting the cross-sectional area of the passage. Second, after passing through the drop inlet of the first drop collector, the air has a certain flow resistance, so that the air can deposit the drop on the opposite side of the passage. It becomes possible.
[0016]
The design of the water mist collector can be simplified by placing the first and second droplet collectors in a passage that extends approximately parallel to the flow direction of the main air flow. It becomes. In this case, the angled bent portion of the baffle plate is the same at both ends of the active baffle surface. At the same time, for a partial air flow, a good flow path can be obtained with minimal flow resistance to the droplet removal effect. This means that after passing through the downstream droplet collector in the water mist collector, the partial air flow has the same flow direction as the main air flow on the incoming side, so the flow direction is It is understood that no correction is necessary. If other factors are advantageous, such as the main air flow after the water mist collector must change its flow direction, place the droplet collector in a passage section that extends diagonally in the desired direction. It is best to do.
[0017]
Upstream of the active baffle surface, the baffle plate in the first row, closest to the air cooler, is at least twice as long as the distance between adjacent baffle plates in that row. It is preferable to have inlet portions that extend linearly parallel to each other in the inflow direction. This inlet section divides the main air flow and, due to its length, makes the partial flow straight to some extent and more laminar. Limiting turbulence in this way leads to facilitating separation of suspended droplets from the partial flow when the partial flow impinges on the active baffle surface.
[0018]
It is desirable that the water mist collector does not cause an excessive pressure drop during supply. In one preferred embodiment, this pressure drop is minimized by the baffle plate extending down to the bottom plate and by a reservoir having an internal partition located below the bottom plate, and the water mist collection. The efficiency of the vessel is improved. This bottom plate is continuous in the region between the baffle plates and is interrupted by drain holes in the channel-shaped droplet collector. Since water and possibly air can only flow from the interior of the droplet collector to the reservoir, the amount of air lost when water is pushed out is relatively small. This amount of air loss is further minimized by the reservoir divided by the partition, which reduces the possibility of air being blown into the reservoir from a less-filled droplet collector and impairing its outlet function. Reduce. These partitions are arranged between the rows of baffle plates, i.e. below the reservoir in the transition between the rows. This reduces the likelihood that the flow conditions in one row will affect the flow conditions in the other row.
[0019]
In one further preferred embodiment, the partition has a through hole near the bottom of the reservoir, the reservoir having at least one outlet below the last row of baffle plates in the water mist collector. However, there is no outlet at the bottom of one front row (a plurality of front rows). By placing the outlets only in the last row of baffle plates, water from the other row droplet collectors is forced to flow through the divider plate. Also, since water can only flow through the through holes near the bottom of the reservoir where only water is present, the air is mostly blown down through the reservoir in the first row or the liquid in the last row of baffle plates. It is prevented from flowing upwards into the drop collector. Otherwise, the water mist collector is short-circuited by such air blowing, and the water is separated upward and outward on the discharge side.
[0020]
The pressure loss in the water mist collector can be further limited by extending the outlet in a pressure sealed state through the outer casing to which the water mist collector is attached. This leads to preventing air from being blown out to the engine compartment through the annular gap around the outlet. It has been normal before to provide such a gap to blow away the water collected in the main conduit between the air cooler and the water mist collector. However, this void causes an excessive pressure loss of the supply air.
[0021]
The water mist collector and cooler can be placed continuously in close proximity between the turbocharger compressor and scavenger in a two-stroke crosshead engine. Typically, a two-stroke crosshead engine has a very high output and correspondingly high air consumption, so it is particularly advantageous to apply the invention to such an engine. This application example can be embodied by a conventional method. In this manner, after being discharged from the cooler, the main air stream flows through a 90 ° bend passage section, after which this air stream flows through a water mist collector. At the bent part of the passage, most of the droplets adhere to the passage wall. This arrangement, however, requires space and may inappropriately limit the design of the air cooler. For this reason, it is preferable to arrange the water mist collector immediately behind the air cooler.
[0022]
In one embodiment, the upstream end of the baffle plate of the water mist collector is located at a distance of 10 mm to 100 mm from the air cooler. The location of this water mist collector, very close to the air cooler, means that the droplets separated from the air cooler have no time to accelerate to a flow velocity equal to the air before entering the water mist collector. Brings advantages. When the droplets are fast, they break up when they collide with the baffle plate and repel back into the air as small droplets, making it more difficult to remove these droplets. Increase. For this reason, it is very advantageous to arrange the water mist collector at a distance of 100 mm or less from the air cooler. In operation, the air cooler and water mist collector are subjected to vibrations due to air pulsations and engine vibrations. Since both the cooler and the water mist collector have a relatively thin plate, the above-mentioned distance of 10 mm is a lower limit value at which the two elements can be brought close to each other. That is because at that distance, a space for vibration must be provided. A minimum distance of 30 mm is often practical to allow for all inaccuracies during installation. The distance between the air cooler and the water mist collector is preferably in the range of 40-60 mm, which on the one hand prevents damage to the thin plate during operation and on the other hand This is because of the reason that it is desirable to appropriately collect droplets while the velocity of the droplets is low.
[0023]
If the downstream limit of the droplet inlet protrudes too deeply into the partial air flow between adjacent baffle plates, the air flowing through is affected by excessive flow resistance, and too much air is liquid. Due to the flow into the drop collector, an excessively strong overflow may occur in the second drop collector. For this reason, it is preferable that the downstream limit portion of the inlet of the droplet protrudes inward by 1 to 2 mm through a surface extending in the surface of the passage wall upstream of the droplet inlet. This captures the droplets reasonably well and at the same time limits both partial and inspiratory flow resistance within the droplet collector.
[0024]
The air cooler used can be a pipe fin cooler that can be divided into parts, but it is also possible to cool by injecting water into the air in several stages . This is described in detail in the Applicant's European Patent No. 0,701,655. In such a cooler, it is important to efficiently remove water between the individual stages, so that the water mist collector is water cooled between at least two of the cooling stages. It is preferable to include in a container. Thus, there will be several water mist collectors connected to the air cooler.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to a polar schematic diagram.
[0026]
FIG. 1 shows the uppermost part of a diesel-type two-stroke uni-flow scavenging crosshead engine 1. This engine can be the ship's main engine or a stationary generator engine, with a nominal output of 2,000 KW for a small engine and 80,000 KW for a maximum engine. Further, this engine may be a four-stroke engine with an output of about 500 KW.
[0027]
The engine 1 can be equipped with a supercharger that can be operated by a mechanically or electrically driven compressor. In the illustrated design, the compressor is part of the turbocharger 4 and the turbocharger turbine is driven by exhaust. As indicated by the black arrow, this exhaust gas flows out of the cylinder 2 through the exhaust valve, enters the exhaust receiver 3, and then exits the engine through the turbocharger. A compressor (not shown) of the turbocharger sucks supply air into the engine as indicated by a white arrow. The pressurized hot supply air flows downward and swirls in the horizontal flow direction as shown by the arrow 5 and enters the air cooler 6, where the air is cooled, At the same time, the water condenses in the air. If this cooler is a pipe fin cooler, most of this water will deposit on the plate-like fins and flow to the discharge end of the cooler, at which the water will be larger Returned to the air in the form of droplets, the larger droplets are released from the fins by air pulsations and vibrations and by flowing air supply. The water mist (water fog) collector 7 is disposed immediately after the air cooler. The supply air flows through the water mist collector 7 and continues to flow into the scavenging receiver 8 connected to the air chamber around the lower end of the cylinder. When the piston is near its bottom dead center, the scavenging port 9 is open, allowing supply air to flow from the air chamber into the cylinder. Thus, in this type of engine, the air inlet of the cylinder is constituted by a scavenging port. Alternatively, if the engine is a four stroke engine, the air inlet is constituted by an intake valve.
[0028]
The water mist collector 7 extends from the top to the bottom in the water mist collector and holds at least one row of baffle plates 10 interrupted by a reinforcing horizontal intermediate bottom. FIG. 2 shows a portion with three baffle plates from a water mist collector with a row of baffle plates. Arrow A indicates the direction of flow of the main air flow. The casing of the water mist collector has a front edge 11 and each of the baffle plates 10 has an inlet portion 12 that projects upstream beyond the front edge. Of course, if these inlet portions that improve overall efficiency are not required, it is possible to produce a water mist collector without forming these inlet portions.
[0029]
A partial air flow A ′ flowing between two adjacent baffle plates impinges on an active baffle surface 14 that extends at an angle of about 45 ° with an inclination to direction A. At the other end of the active baffle surface 14, the baffle plate is bent backward by the same angle so that the partial air flow is in a flow direction substantially parallel to direction A on the supply side. Turn away from the baffle board. The active baffle surface 14 may extend at an angle other than 45 °, such as an angle in the range of 30 ° to 60 °, but is reasonably large with a moderately low flow resistance. The angle of 45 ° is preferable so that the droplet removing effect can be obtained.
[0030]
The first droplet collector 15 has a groove shape toward the height of the water mist collector, and the activity in the region where the baffle plate is bent so as to return to its first path ( It has a droplet inlet 16 at the end of the (active) baffle surface. Similarly, the second droplet collector 17, which has a groove shape toward the height of the water mist collector, is disposed in a direct extension of the droplet collector 15, and The two droplet collectors have a droplet inlet 18 that opens into an adjacent passage on the opposite side of the baffle plate. The other side of the baffle plate can be referred to as the rear, while the opposite side with its active baffle surface 14 can be referred to as the front.
[0031]
The internal cavity of the first droplet collector is elongated in the direction of arrow A, and in the illustrated embodiment has a length equal to about four times its width. The downstream end 19 of the first droplet collector is rounded. The second droplet collector is substantially the same design as the second droplet collector, except for the droplet inlet. If desired, the free plate edge at the drop inlet can be bent inward into the internal cavity to prevent overflow. However, when air passes through the baffle plate, it provides a reasonably large internal volume for the droplet collector by increasing its length to the extent that it does not have any significant effect on flow resistance. It is preferable.
[0032]
The baffle plate is typically a thin plate of corrosion-resistant steel bent to the desired shape and is connected by welding, such as spot welding, thermal soldering or similar stable connection methods as needed. Another possibility is to extrude the baffle plate to the desired shape with an aluminum alloy.
[0033]
For simplicity, the same reference numerals are used in the following description for the same type of details as described above.
In another embodiment of the engine illustrated in FIGS. 3 and 4, the arrangement of the elements in the air cooler is slightly different from that in FIG. The air cooler 6 and the water mist collector 7 are arranged at the same height as the scavenging receiver 7, and this state can be seen in FIG. 4, where the water mist collector is as shown in FIG. It is equipped with three rows of baffle plates rather than just one row.
[0034]
The supply air from the compressor flows down into the bent portion 20 of the passage, swirls toward the air cooler 6 and flows into the air cooler, and immediately after exiting from the downstream end 21 in the air cooler. In addition, this air supply flows between the inlet portions 12 in the water mist collector. The water mist collector is bolted to the partition portion 23 by the flange portion 22, and the partition portion has a through hole 24 having a size equal to the flow area of the water mist collector. This ensures that the air supply passes only through the water mist collector by flowing through the baffle plate 10. The air stream flows after the water mist collector toward the scavenging receptacle 8 and flows through a number of openings 25 to the scavenging receptacle. The scavenging receptacle is further provided with air supply from an electrically driven auxiliary blower (not shown in FIGS. 3 and 4) attached to the opening 26 at the end of the receptacle.
[0035]
The water mist collector is illustrated in more detail in FIGS. There are three rows of baffle plates 30, 31, 32, which start from the downstream end of the second droplet collector 17 of the baffle plate row in front of it. The baffle plates in these baffle plate rows are connected to each other so as to obtain optimum efficiency. This is done through one of the connection methods described above. In order to minimize wasted space in the water mist collector casing, the active baffle surface is alternately inclined with respect to one side and the opposite side. The first row of baffle plates can be 40 to 50% efficient when operating with a large amount of air flowing through and flowing, and the second row of baffle plates is 20%. The baffle plate of the third baffle plate row can be at least 5 to 10% efficient. By interconnecting the baffle plates in a row, perhaps as a result of avoiding turbulence in the partial flow due to vortices that shear the air flowing through the free ends in a row, perhaps Efficiency can be improved by at least about 10%.
[0036]
The bottom of the droplet collector ends at the bottom plate 33. The bottom plate 33 is continuous in the region between the baffle plates so that air supply is not blown down through the passage, but is interrupted by one or more drain holes 34 in each droplet collector, Thus, water can flow into the reservoir 35 below the bottom plate. Between each row of baffle plates, in particular, between the last drain hole in one row and the first drain hole 34 in the next row, the reservoir comprises a partition portion 36, and the partition The part has a through hole 37 formed near the bottom of the reservoir. A number of outlets 38 are attached to the bottom of the reservoir below the baffle plates in the last row. The outlet is formed from two flange members 39, 40, with gaskets clamped together so that they can abut in a pressure-sealable manner around holes formed in the bottom plate 41 of the outer casing. A conduit (not shown) is connected to the drainage port, and the drainage port is connected to the drainage tank. If there are several outlets, the reservoir 35 can be divided between adjacent outlets by a partition portion 42 that extends substantially perpendicular to the partition portion 36.
[0037]
FIG. 9 shows a graph of the efficiency of a water mist collector of the type described above with respect to three connected rows of baffle plates. There are 48 baffle plates that cover an inflow region that is 1200 mm high and 930 mm wide. This efficiency indicates the amount of water removed as a function of liters per hour. It is understood that this efficiency is about 99% at 240 liters / hour and remains very high over a wide operating range. At 500 liters / hour, this efficiency is about 94%.
[0038]
Various modifications of the above embodiment can be realized. In particular, when baffle plates are manufactured by bending thin plates, these baffle plates have paths that generate eddy currents than those shown in FIG. 2, and in some of the embodiments described above, the first and second There is no need to place the two droplet collectors in the extension of each other. Also, the downstream edge 18 of the droplet inlet, ie the end of the free sidewall in the second droplet collector, protrudes slightly into the incoming air, so that the droplet inlet 18 is downstream of it. Drops that have not been sucked into the inlet at the end are also removed. The passage portions in the first and second droplet collectors need not extend parallel to the direction A, but can be oriented at an angle with respect to the direction A. This is advantageous in the last row of baffle plates, especially if the air needs to swirl immediately after the water mist collector. This swiveling can be initiated by placing the passage portion at an appropriate angular position.
[Brief description of the drawings]
FIG. 1 is an overall outline view of an air flow through a supercharged diesel engine according to the present invention, where the charge air travels through a water mist collector.
2 is a cross-sectional view at a more enlarged scale along three adjacent baffle plates arranged in a row in the water mist collector of FIG. 1. FIG.
FIG. 3 is a sectional plan view of an outer casing of an air cooler and a water mist collector according to another embodiment of the present invention.
4 is a cross-sectional view of the outer casing along line IV-IV in FIG. 3, omitting details of the air cooler and water mist collector.
FIG. 5 is a front side view of the water mist collector of FIG. 3 on an enlarged scale.
6 is a side view of a water mist collector similar to FIG. 5. FIG.
7 is a cross-sectional view of the water mist collector of FIG. 5 on an enlarged scale.
FIG. 8 is a cross-sectional view of the water outlet formed in the outer casing on an enlarged scale.
FIG. 9 is a graph showing the efficiency of a water mist collector.
[Explanation of symbols]
1 Engine 2 Cylinder
3 Exhaust receiver 4 Turbocharger
5 Direction of intake air flow 6 Air cooler
7 Water mist collector 8 Scavenging receiver
9 Scavenging port 10 Baffle plate
11 Front edge 12 Entrance part
14 Working surface of baffle plate 15 First droplet collector
16, 18 Droplet inlet
17 Second droplet collector 19 Downstream end
A Main air flow direction A 'Partial air flow direction

Claims (13)

At least one compressor for supplying supply air to the air inlet of the cylinder, and disposed in the supply air flow path between the compressor and the air inlet of the cylinder to cool the supply air before being supplied to the cylinder At least one water mist collector (7) having at least one air cooler (6) and at least one row of baffle plates (30, 31, 32) dividing the main air flow of the charge air into partial flows. An internal combustion engine (1) equipped with a diesel-type supercharger, wherein each baffle plate on one side extends obliquely with respect to the flow direction of the main air flow (active) baffle surface ( 14) and a diesel-type supercharged internal combustion engine comprising a first grooved droplet collector (15) having a droplet inlet (16) arranged at the end of the active baffle surface In 1) A second groove-shaped droplet collector (17) is placed where the first groove-shaped droplet collector extends directly, and the droplet inlet (18) of the second groove-shaped droplet collector is Located on the opposite side of the baffle plate, the downstream end (19) of the first droplet collector (15) is the upstream limit of the droplet inlet (18) of the second grooved droplet collector. An internal combustion engine with a diesel supercharger, characterized in that it is set. 2. The internal combustion engine with a supercharger according to claim 1, wherein the downstream end (19) of the first groove-shaped droplet collector (15) is rounded. . The supercharged internal combustion engine according to claim 1 or 2, wherein at least one of the first and second groove-shaped droplet collectors (15, 17) has an elongated shape having an internal cavity, An internal combustion engine with a supercharger, characterized in that the cavity extends from the droplet inlet in the direction of the flow of the charge air over a length equal to at least twice its width. 4. An internal combustion engine with a supercharger as claimed in claim 1, wherein the droplet inlets (18) of the second channel-shaped droplet collector (17) are in the same baffle plate array. Downstream from the droplet inlet (16) of the first grooved droplet collector, it is arranged with a space of at least one passage width , preferably 1.5 to 4 passage widths apart. An internal combustion engine with a supercharger. 5. The internal combustion engine with a supercharger according to claim 1, wherein the first and second groove-shaped droplet collectors (15, 17) are in a flow direction (A) of the main air flow. An internal combustion engine with a supercharger, wherein the internal combustion engine is arranged in a passage portion extending substantially in parallel. The internal combustion engine with a supercharger according to any one of claims 1 to 5, wherein the baffle plates (30) in the first row (30) closest to the air cooler, upstream of the active surface of the baffle plate. 10) have inlet portions (12) that extend linearly parallel to each other in the direction of air flow over a length of at least twice the distance between adjacent baffle plates in the row. An internal combustion engine with a supercharger. 7. The internal combustion engine with a supercharger according to claim 1, wherein the baffle plate extends downward to a bottom plate (33), and the bottom plate is in a region between the baffle plates (10). Is interrupted by a drain hole (34) in the channel-shaped droplet collector and has a plurality of internal partitions (36) below the bottom plate, preferably between the baffle plate rows. An internal combustion engine with a supercharger, characterized in that a reservoir is arranged. The internal combustion engine with a supercharger according to claim 7, wherein the internal partition (36) has a through hole (37) in the vicinity of the bottom of the reservoir, and the reservoir is the last in the water mist collector. An internal combustion engine with a supercharger, characterized in that it has at least one outlet (38) below the baffle plate of the row, but has no outlet below the previous row. 9. The internal combustion engine with a supercharger according to claim 8, wherein the outlet (38) penetrates an outer casing to which the water mist collector is attached in a pressure-sealed state. Internal combustion engine. The internal combustion engine with a supercharger according to any one of claims 1 to 9, wherein the water mist collector (7) and the cooler (6) are turbochargers in a two-stroke crosshead engine. An internal combustion engine with a supercharger, characterized in that it is arranged continuously in close proximity between the compressor and the scavenging receiver (8). 11. The internal combustion engine with a supercharger according to claim 1, wherein an upstream end of a baffle plate (10) of the water mist collector is 10 mm to 100 mm from the air cooler (6), preferably An internal combustion engine with a supercharger, which is arranged at a position 40 to 60 mm apart. 12. The internal combustion engine with a supercharger according to claim 1, wherein the downstream limit of the droplet inlet (16, 18) extends in the surface of the passage wall upstream of the droplet inlet. An internal combustion engine with a supercharger, characterized in that it protrudes through the surface into a partial air flow between adjacent baffles by 1 to 2 mm. The internal combustion engine with a supercharger according to any one of claims 1 to 12, wherein the air cooler is capable of injecting water in a plurality of stages, and the water mist collector is at least two of the stages . An internal combustion engine with a supercharger, characterized in that it is included in the air cooler between the two.

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