JP2015121111A - Marine engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suitable layout of a supercharger and an intercooler, in a marine engine of a one-stage supercharging type.SOLUTION: A one-stage supercharging type marine engine 100 is equipped with an engine body, a supercharger 11, and an intercooler 13. The engine body includes a cylinder block and a cylinder head, and has a side surface on a long side and a side surface on a short side. The supercharger 11 sucks air by using exhaust gas. The intercooler 13 cools the gas passing trough the supercharger 11. The supercharger 11 and the intercooler 13 are disposed on the side surface on the long side of the engine body while being aligned in a crank shaft direction.

Description

  The present invention relates to an engine provided with a supercharger and an intercooler and installed in a ship.

  2. Description of the Related Art Conventionally, in an engine installed in a ship, a configuration including a supercharger and an intercooler is known. The air compressed by the supercharger becomes a high temperature, and an intercooler is arranged to cool the high temperature air. Patent Document 1 discloses an engine including two sets of a supercharger and an intercooler.

  In Patent Literature 1, when the engine is viewed from above, the first supercharger is disposed on one of the short sides, and the first intercooler and the second supercharger are disposed along the long sides. Disclosed is a layout in which a second intercooler is disposed on the other short side.

Japanese Patent Application No. 2012-010526

  By the way, since the high-temperature air passes through the intake pipe between the supercharger and the intercooler, it is necessary to take measures such as covering with an insulating material. However, since the configuration of Patent Document 1 is a two-stage supercharged engine, the first supercharger and the first intercooler are arranged on different side surfaces due to layout, and the second supercharger And the second intercooler are also arranged on different sides. As a result, the distance between the supercharger and the intercooler is increased to some extent.

  Patent Document 1 is an invention based on a two-stage supercharged engine, and does not describe the layout of the single-stage supercharged engine. In Patent Document 1, the first intercooler and the second supercharger are arranged on the same side surface. However, air that has been cooled by the first intercooler passes through the intake pipe that connects the first intercooler and the second supercharger. There are few advantages to shortening the tube.

  The present invention has been made in view of the above circumstances, and a main object thereof is to provide an appropriate layout of a supercharger and an intercooler in a one-stage supercharged marine engine.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, a marine engine having the following configuration is provided. That is, this marine engine is a one-stage supercharging marine engine including an engine body, a supercharger, and an intercooler. The engine body includes a cylinder block and a cylinder head, and has a long side surface and a short side surface. The supercharger performs intake using exhaust gas. The intercooler receives the gas that has passed through the supercharger and cools the gas. The supercharger and the intercooler are arranged side by side in the crankshaft direction on the side surface on the long side of the engine body.

  Thereby, since a supercharger and an intercooler are arrange | positioned linearly, piping which becomes high temperature can be shortened. Also, by arranging the turbocharger and intercooler side by side on the side of the long side of the engine body, the size of the long side of the engine can be reduced, or a large turbocharger and intercooler can be placed be able to.

  The marine engine preferably has the following configuration. That is, the marine engine includes a top cover that covers the upper surface of the engine body. When the height that bisects the center of the top surface that is the outer surface of the top cover and the bottom surface that is the opposite surface is a reference height, the supercharger and the intercooler are It is arranged on the upper surface side than the reference height.

  Thereby, since a supercharger and an intercooler are arrange | positioned at the upper part, the workability | operativity of a maintenance can be improved. In addition, since the intake manifold is disposed at a relatively high position, the pipe can be shortened by providing a pipe that directly connects the intercooler to the intake manifold.

  The marine engine preferably has the following configuration. That is, this marine engine includes an oil filter and a fuel filter. The oil filter is disposed at one end of the crankshaft direction and removes foreign matter from the engine oil. The fuel filter is disposed at the other end portion in the crankshaft direction and removes foreign matters from the fuel. The oil filter and the fuel filter are arranged on the upper surface side with respect to the reference height.

  Thereby, another apparatus can be arrange | positioned at the upper part of the edge part (end part of a short side) where the supercharger was arrange | positioned conventionally. In particular, the workability of the maintenance can be further improved by arranging the filters that require filter replacement or the like at this position.

  The marine engine preferably has the following configuration. That is, the marine engine includes a mixing elbow that mixes and discharges exhaust gas that has passed through the supercharger and water taken from outside the ship. The mixing location of the exhaust gas and water taken from outside the ship, the supercharger, and the intercooler are arranged in the crankshaft direction, and the mixing location and the supercharger are adjacent to each other. Be placed.

  Thereby, since a mixing location and a supercharger are arrange | positioned so that it may adjoin, the piping (relatively high temperature piping) through which the exhaust gas which passed the supercharger passes can be shortened. Moreover, since the mixing location and the intercooler are arranged in a straight line, piping for discharging water taken from the outside of the ship can be arranged simply (without bending too much).

The top view of the engine which concerns on one Embodiment of this invention. The side view by the side of the intake manifold of an engine. The side view of the exhaust manifold side of an engine. The side view by the side of the flywheel of an engine. The side view by the side of the belt cover of an engine. The perspective view which shows the vicinity of an oil filter. The perspective view which shows the vicinity of a fuel filter. The perspective view which looked at the control box from the upper right. The perspective view which looked at the control box from the upper left. Schematic explaining the inside of a control box.

  Next, embodiments of the present invention will be described with reference to the drawings. The marine engine 100 is a diesel engine and is an inboard engine for marine vessels.

  In the following description, as shown in the plan view of FIG. 1, the side where the flywheel housing 7 is located in the direction along the crank axis L is referred to as “front side”, and the belt cover 8 or the oil filters 34 and 35 are located. The side to perform is called “rear side”. Further, the left side and the right side toward the front side of the marine engine 100 are simply referred to as “left side” and “right side”. Further, a view seen from the left side is referred to as a left side view or the like. Further, as shown in a side view of FIG. 2 and the like, the side on which the top cover 6 is located is referred to as “upper side”, and the side on which the oil pan 1 is located is referred to as “lower side”.

  First, basic components, a cover, a housing, and the like of the marine engine 100 will be described with reference to FIGS. FIG. 1 is a plan view of the marine engine 100, and FIGS. 2 to 5 are side views of the marine engine 100.

  The marine engine 100 includes an oil pan 1, an engine body 2, a cylinder head cover 5, a top cover 6, a flywheel housing 7, and a belt cover 8 as components of this type (FIGS. 1 and 2).

  The oil pan 1 is located at the lower end of the marine engine 100. The oil pan 1 is a container-like part for storing engine oil. The oil pan 1 is disposed between the flywheel housing 7 and the belt cover 8.

  The engine body 2 is disposed above the oil pan 1 and in the center of the marine engine 100. The engine body 2 includes a cylinder block 3 and a cylinder head 4. As shown in FIG. 1, the left side surface and the right side surface of the engine body 2 are long side surfaces, and the front side surface and the rear side surface of the engine body 2 are short side surfaces.

  The cylinder block 3 is attached to the upper side of the oil pan 1. The size of the cylinder block 3 in the front-rear direction and the left-right direction is the same as that of the oil pan 1. The cylinder block 3 is formed with a hole and a cylinder for accommodating a crankshaft and the like. Further, screw holes for attaching various parts are formed on the side surface of the cylinder block 3.

  The cylinder head 4 is attached to the upper side of the cylinder block 3. The cylinder head 4 forms a combustion chamber together with the cylinder block 3. The cylinder head 4 is attached with an injector for injecting fuel.

  The cylinder head 4 is covered with a cylinder head cover 5. An intake valve and an exhaust valve (not shown) are arranged inside the cylinder head cover 5.

  The top cover 6 is located at the upper end of the marine engine 100. The top cover 6 is disposed so as to cover the cylinder head cover 5. The top cover 6 is attached by top cover mounting brackets 55 and 56 described later. The top surface of the top cover 6 is configured to be flat.

  The flywheel housing 7 is located at the front end of the marine engine 100 and is attached to the front side of the cylinder block 3. A flywheel (not shown) is disposed inside the flywheel housing 7.

  The belt cover 8 is located at the rear end of the marine engine 100 and is attached to the rear side of the cylinder block 3. The belt cover 8 includes a first belt cover 8a and a second belt cover 8b (FIGS. 3 and 5, etc.).

  The first belt cover 8a is disposed on the cylinder block 3 side and covers a belt that is driven by connecting a crankshaft and a cooling water pump 26 described later. The second belt cover 8b is disposed on the rear end side with respect to the first belt cover 8a. The second belt cover 8b covers a belt that connects and drives the crankshaft and a seawater pump (not shown).

  Next, the components of the intake system and the exhaust system will be described with reference to FIGS.

  The marine engine 100 includes an intake silencer 10, a supercharger 11, intake pipes 12 and 14, an intercooler 13, an intake manifold 15, an exhaust manifold 16, and mixing as intake system and exhaust system components. And an elbow 17.

  The intake silencer 10 is disposed substantially at the center of the left side surface (side surface on the exhaust manifold 16 side) of the engine body 2 (FIG. 1). The intake silencer 10 includes a filter that prevents inhalation of dust and the like in the air and reduces intake noise when external air is inhaled.

  The supercharger 11 is disposed on the left side of the engine body 2 and on the front side of the intake silencer 10. The supercharger 11 includes a turbine housing 11a having a turbine wheel (not shown) and a compressor housing 11b having a compressor wheel (not shown).

  The turbine wheel is configured to rotate using exhaust gas. The compressor wheel is connected to the same shaft as the turbine and rotates as the turbine wheel rotates. The turbocharger 11 can compress air and forcibly intake air by rotating the compressor wheel. The outlet of the compressor housing 11b is arranged so as to face the right side (center side of the engine body 2).

  The intake pipe 12 is connected to the intake silencer 10 and the supercharger 11. The air sucked by the intake silencer 10 and the supercharger 11 flows through the intake pipe 12. The intake pipe 12 extends from the lower side of the top cover 6 to the right side (center side of the engine body 2), and then gently bends to the rear side and is connected to the front side of the intercooler 13. In addition, since the air heated to high temperature by the supercharger 11 flows through the intake pipe 12, the intake pipe 12 passes under the top cover 6 to prevent the high-temperature intake pipe 12 from being exposed to the outside. it can.

  Further, the supercharger 11 and the intercooler 13 are arranged linearly in parallel with the crankshaft and are arranged at the same height (FIG. 3). Thereby, since the distance of the supercharger 11 and the intercooler 13 can be shortened as much as possible, the length of the intake pipe 12 can be shortened.

  The intercooler 13 cools the air flowing through the intake pipe 12 by heat exchange between the air flowing through the intake pipe 12 and water taken from outside the ship (seawater in the present embodiment). An intake pipe 14 is connected to the rear end and the lower end of the intercooler 13 (FIG. 5).

  The intake pipe 14 passes below the intercooler 13 and below oil filters 34 and 35 described later, and is connected to the rear end of the intake manifold 15 disposed on the right side surface of the engine body 2. The intake pipe 14 extends from the lower side of the intercooler 13 and detours so as to extend upward before the intake manifold 15. However, since the air flowing through the intake pipe 14 has been cooled by the intercooler 13, a heat insulating structure of the piping is unnecessary. By bypassing the intake pipe 14, the oil filters 34 and 35 can be disposed upward, so that the maintainability of the oil filter can be improved.

  The intake manifold 15 is disposed on the right side (intake surface side) of the engine body 2, and specifically, is attached to the right side of the cylinder head 4. The intake manifold 15 supplies the air supplied from the intake pipe 14 to the cylinder head 4 in a number corresponding to the number of cylinders.

  In the combustion chambers of the cylinder block 3 and the cylinder head 4, after the air supplied from the intake manifold 15 is compressed, fuel is injected to drive the piston to generate power.

  As shown by a broken line in FIG. 1, the exhaust manifold 16 is disposed on the left side of the engine body 2 and inside the supercharger 11. The exhaust manifold 16 is disposed at the same height as the supercharger 11. The exhaust manifold 16 collectively supplies exhaust gases generated in the plurality of combustion chambers to the turbine housing 11 a of the supercharger 11.

  The exhaust gas supplied from the exhaust manifold 16 to the turbine housing 11a is used to rotate the turbine wheel, and then is discharged to the outside from the mixing elbow 17 connected to the front side of the supercharger 11.

  The seawater taken from the outside of the ship passes through the seawater pipe 21 and is supplied to the intercooler 13. Thereafter, the seawater is supplied to the fresh water cooler 23 via the seawater pipe 22.

  The fresh water cooler 23 is disposed on the left side of the engine body 2 and below the supercharger 11 (FIG. 3). The fresh water cooler 23 cools the cooling water by heat exchange between seawater and cooling water (fresh water). The cooling water cooled by the fresh water cooler 23 is used for cooling each part of the engine by the cooling water pump 26.

  A seawater pipe 24 is connected to the front side of the fresh water cooler 23. The seawater pipe 24 extends upward and is connected to the mixing elbow 17. Therefore, the seawater heat-exchanged by the fresh water cooler 23 is discharged | emitted with exhaust gas from the mixing elbow 17 via the seawater pipe 24. FIG.

  Here, in the mixing elbow 17, the mixing location where the exhaust gas and seawater are mixed is the same height as the supercharger 11 and the intercooler 13, arranged in the crankshaft direction, and the mixing location and the supercharger. 11 are arranged adjacent to each other. Thereby, piping of the mixing elbow 17 and the seawater pipe 24 can be simplified.

  Next, the oil filters 34 and 35 will be described mainly with reference to FIGS. FIG. 6 is a perspective view showing the vicinity of the oil filters 34 and 35.

  The marine engine 100 includes an oil filter mounting portion 31 and auxiliary brackets 32 and 33 that assist the support of the oil filters 34 and 35 as parts for supporting and mounting the oil filters 34 and 35.

  The oil filter attachment portion 31 includes a first attachment portion 31 a that can be attached to the cylinder block 3 and a second attachment portion 31 b that can attach the oil filters 34 and 35. An engine oil path for flowing engine oil is formed inside the oil filter mounting portion 31. The oil filters 34 and 35 and the cylinder block 3 are connected by this engine oil path.

  The auxiliary bracket 32 supports the oil filters 34 and 35 by fixing the second mounting portion 31b to another member.

  The auxiliary bracket 33 is an L-shaped plate material and includes a first bracket 33a perpendicular to the front-rear direction and a second bracket 33b perpendicular to the left-right direction. The rear end of the first bracket 33a is attached to the second attachment portion 31b. The second bracket 33b is attached to the rear end of the intercooler 13. Thereby, the auxiliary bracket 33 assists the support of the oil filters 34 and 35. The auxiliary bracket 33 is formed with a through hole for passing an electric wire.

  Further, on the further rear side of the second mounting portion 31b, the protective bracket 36, which is a crank-shaped plate material, is disposed so as to cover the electric wire that has passed through the through hole of the auxiliary bracket 33, Protect the wire.

  One of the oil filter 34 and the oil filter 35 is a full flow filter, and the other is a bypass filter. The oil filters 34 and 35 remove metal powder and the like contained in the engine oil. An oil cooler 37 for cooling the engine oil is disposed on the right side of the engine body 2 (FIG. 2).

  Next, components related to fuel will be described with reference to FIGS. FIG. 7 is a perspective view showing the vicinity of the fuel filter.

  The marine engine 100 includes a fuel filter mounting portion 42, fuel filters 43 and 44, a fuel pump 45, and a common rail 46 as fuel-related parts.

  The fuel filter attachment portion 42 is a substantially L-shaped plate material in which a plurality of bends are formed. Specifically, the fuel filter mounting portion 42 includes a base surface 42a that is a surface parallel to the left-right direction and a protruding surface 42b that is a surface parallel to the front-rear direction. The base surface 42a is attached to the cylinder head 4 (specifically, the front end portion of the cylinder head 4 in which a timing wheel, a timing chain, and the like are incorporated). Fuel filters 43 and 44 are attached to the protruding surface 42b.

  The fuel filters 43 and 44 are disposed on the front side of the engine body 2 and on the upper side of the flywheel housing 7. The fuel filters 43 and 44 remove dust and dirt contained in the fuel.

  The fuel pump 45 is disposed on the right side (the intake manifold 15 side) of the engine body 2 (FIG. 2). The fuel pump 45 sends the fuel that has passed through the fuel filter to the common rail 46.

  The common rail 46 is disposed above the intake manifold 15 (cylinder head cover 5). The common rail 46 stores the supplied fuel at a high pressure. The common rail 46 supplies the stored fuel to an injector (not shown).

  Next, the configuration of the control box 51 arranged immediately below the top cover 6 and its surroundings will be described mainly with reference to FIGS. 8 and 9 are perspective views showing the periphery of the control box 51. FIG. FIG. 10 is a schematic diagram illustrating the inside of the control box 51.

  The control box 51 is a metal box-like member, and is disposed between the cylinder head cover 5 and the top cover 6. Further, the top cover 6 and the control box 51 partially overlap each other when viewed from above (FIG. 1). The control box 51 includes a box-shaped base portion 51a whose upper side (top cover 6 side) is opened, and a cover portion 51b that covers the upper opened portion. As shown in FIG. 9, the base 51a has two portions having different heights. Specifically, the right side (end portion side) of the base portion 51a is larger in the vertical size than the left side (center side). A control device that controls the marine engine 100, electrical components such as a relay and a fuse, a harness, and a connector are attached to the base 51a.

  First, a method for attaching the control box 51 will be described. On the lower surface of the base portion 51a of the control box 51, two mounting bases 52a and 52b are attached on the right side (a portion with a large vertical size) (FIG. 8), and 1 on the left side (a portion with a small vertical size). Two mounting bases 52c are attached (FIG. 9). The mounting bases 52a, 52b, and 52c are attached to the base portion 51a with bolts or the like. In particular, the mounting base 52c is attached to the control box 51 via the anti-vibration rubber 54 at its front end and rear end. The mounting bases 52a, 52b, and 52c are formed with mounting holes for mounting to other members.

  An attachment auxiliary member 53 is attached to the intake manifold 15. The attachment auxiliary member 53 is an L-shaped plate member that is attached so as to cover the right side surface and the upper surface of the intake manifold 15. Attachment holes are formed in the attachment auxiliary member 53 in the vicinity of the front and rear end portions. The two mounting holes and the mounting holes formed in the mounting bases 52a and 52b are formed at positions corresponding to each other.

  The control box 51 is installed by attaching bolts or the like to the mounting holes formed in the mounting bases 52a and 52b and the mounting auxiliary member 53 while sandwiching the vibration isolating rubber 54 between the mounting bases 52a and 52b and the mounting auxiliary member 53. It is attached to the intake manifold 15. As described above, since all four points of the control box 51 can be supported via the anti-vibration rubber 54, the control box 51 can be stably supported.

  Mounting holes are formed in the front end and the rear end of the mounting base 52c, respectively. On the other hand, the cylinder head cover 5 is also formed with a total of two mounting holes at positions corresponding to the two mounting holes of the mounting base 52c.

  The control box 51 is attached to the cylinder head cover 5 by attaching bolts or the like to these attachment holes. The control box 51 is attached as described above. When removing the control box 51, only the control box 51 may be removed, or the control box 51 and the mounting bases 52a, 52b, 52c may be removed together.

  As shown in FIG. 10, the control box 51 includes an ECU 61, an EDU (engine driver unit) 62, a hull control system connection connector 63, a relay 64, a fuse 65, a maintenance tool connection connector 66, Is attached. Each device inside the control box 51 is connected to other devices inside or outside the control box 51 by a harness (not shown). A harness insertion hole 67 is formed in the base portion 51a. The harness connecting the device inside the control box 51 and the external device passes through the harness insertion hole 67. In the present embodiment, the harness insertion holes 67 are formed on the two opposing surfaces (front side surface and rear side surface), but the formation location and number can be changed as appropriate.

  The ECU 61 performs overall control of the marine engine 100. For example, the opening of various valves and the fuel injection amount are controlled based on the user's instruction or the detection results of various sensors. The EDU 62 receives the instruction from the ECU 61 and drives the injector. From the connector 63 to the hull control system, instructions such as engine start, stop, and engine speed are received. The relay 64 is a relay such as a starter relay, and the fuse 65 is a device that prevents an excessive current from flowing. The maintenance tool connector 66 is a terminal used for maintenance and service.

  As described above, since the control devices and the electrical components are arranged in a concentrated manner, it is possible to improve work efficiency such as maintenance and replacement of the electrical components.

  Next, devices arranged in the vicinity of the control box 51 will be described. Around the control box 51, top cover mounting brackets 55 and 56 and a connecting bracket 57 are arranged.

  The top cover mounting brackets 55 and 56 are disposed on the front side and the rear side of the control box 51 so as to face each other. In other words, the top cover mounting brackets 55 and 56 are arranged in parallel in the front-rear direction. The top cover mounting brackets 55 and 56 are composed of vertical surfaces 55a and 56a and horizontal surfaces 55b and 56b.

  The vertical surfaces 55a and 56a are surfaces parallel to the vertical direction, and are attached to the cylinder head cover 5 at the lower end.

  The horizontal surfaces 55b and 56b are portions formed by bending a part of the vertical surfaces 55a and 56a at a substantially right angle. Attachment holes are attached to the vertical surfaces 55a and 56a, and the top cover 6 is attached using these attachment holes.

  The connecting bracket 57 is a bracket that connects the top cover mounting bracket 55 and the top cover mounting bracket 56. Accordingly, the connection bracket 57 is attached perpendicularly to the top cover attachment brackets 55 and 56. Both ends of the connecting bracket 57 are bent, and the connecting bracket 57 is attached to the top cover mounting brackets 55 and 56 by mounting holes formed in the bent portions.

  The upper periphery of the cylinder head cover 5 can be covered with the above three brackets. Here, the common rail 46 and the injector are positioned above the cylinder head cover 5 as described above. Therefore, even if fuel leaks, the top cover mounting brackets 55 and 56 or the connecting bracket 57 can receive the leaked fuel. Accordingly, it is possible to prevent the leaked fuel from reaching the high temperature exhaust side (the left side of the engine body 2). Moreover, since the three brackets are arranged so as to cover the control box 51, the control box 51 can be protected.

  Next, with reference to side views (FIGS. 2 and 3), the height at which each component is arranged will be described. In the present embodiment, the upper surface of the top cover 6 constitutes a part of the upper surface of the marine engine 100. Further, the lower surface of the oil pan 1 constitutes a part of the lower surface of the marine engine 100. Therefore, the length from the lower surface of the oil pan 1 to the upper surface of the top cover 6 can be said to be the height of the marine engine 100. Hereinafter, as shown in FIGS. 2 and 3, half of the height of the marine engine 100 is referred to as a “reference height”.

  In the present embodiment, in particular, the following parts are arranged above the reference height. That is, the supercharger 11, the intercooler 13, the oil filters 34 and 35, the fuel filters 43 and 44, and the control box 51. Note that “higher than the reference height” means that the central portion of each part is higher than the reference height, but most parts are higher than the reference height even at the lower end.

  This type of component requires frequent replacement, and therefore requires frequent maintenance. Further, in a marine engine, an operator often performs maintenance from above. Therefore, a layout with good workability for the operator who performs maintenance is realized by arranging the parts with high maintenance frequency above.

  As described above, the marine engine 100 according to the present embodiment is a one-stage supercharged marine engine 100 including the engine body 2, the supercharger 11, and the intercooler 13. The engine body 2 includes a cylinder block 3 and a cylinder head 4 and has a side surface on the long side and a side surface on the short side. The supercharger 11 performs intake using exhaust gas. The intercooler 13 receives the gas that has passed through the supercharger 11 and cools the gas. The supercharger 11 and the intercooler 13 are arranged side by side in the crankshaft direction on the long side surface of the engine body 2.

  Thereby, since the supercharger 11 and the intercooler 13 are arrange | positioned linearly, the intake pipe 12 used as high temperature can be shortened. Further, by arranging the supercharger 11 and the intercooler 13 side by side on the side surface on the long side of the engine main body 2, the size of the long side of the engine can be suppressed, or the large turbocharger 11 and the intercooler 13. Can be arranged.

  Further, the marine engine 100 of the present embodiment includes a top cover 6 that covers the upper surface of the engine body 2. The supercharger 11 and the intercooler 13 are disposed on the upper surface side of the reference height.

  Thereby, since the supercharger 11 and the intercooler 13 are arrange | positioned at the upper part, the workability | operativity of a maintenance can be improved. In the present embodiment, the intake pipe 14 is detoured in consideration of the maintenance workability of the oil filters 34 and 35. However, the intake pipe 14 is connected to the intake manifold 15 without changing the height of the intake pipe 14, thereby The length of the tube can be reduced.

  Further, the marine engine 100 of the present embodiment includes oil filters 34 and 35 and fuel filters 43 and 44. The oil filters 34 and 35 are disposed at one end of the crankshaft direction and remove foreign substances from the engine oil. The fuel filters 43 and 44 are disposed at the other end in the crankshaft direction and remove foreign substances from the fuel. The oil filters 34 and 35 and the fuel filters 43 and 44 are arranged on the upper surface side from the reference height.

  Thereby, another apparatus can be arrange | positioned in the upper part of the edge part (end part of a short side) where the supercharger 11 was arrange | positioned conventionally. In particular, the workability of the maintenance can be further improved by arranging the filters that require filter replacement or the like at this position.

  Further, the marine engine 100 according to the present embodiment includes a mixing elbow 17 that mixes and discharges exhaust gas that has passed through the supercharger 11 and water taken from outside the ship. The mixing location of the exhaust gas and the water taken from the outside of the ship, the supercharger 11 and the intercooler 13 are arranged in the crankshaft direction, and the mixing location and the supercharger 11 are arranged adjacent to each other. .

  Thereby, since the mixing location and the supercharger 11 are disposed adjacent to each other, the pipe (mixing elbow 17) through which the exhaust gas that has passed through the supercharger 11 passes can be shortened. Moreover, since the mixing location and the intercooler 13 are arranged in a straight line, the piping (seawater pipe 24) for discharging water taken from the outside of the ship can be arranged simply (without bending too much).

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  The arrangement of the control box 51 is arbitrary, and may not be directly below the top cover 6. Moreover, although it is preferable to arrange | position above said reference height, you may arrange | position below.

  The shape and material of the control box 51 are arbitrary, and the height may be uniform. Further, the control box 51 may not be a closed box shape. For example, when a plurality of electrical components including an ECU are attached to a flat member, the flat member corresponds to the control device attachment portion.

  The apparatus arrange | positioned in the control box 51 is arbitrary, and is not restricted to the apparatus quoted above. Also, the arrangement of the apparatus is arbitrary and can be changed as appropriate.

  In the above description, the supercharger 11 and the intercooler 13 are disposed on the left side of the engine body 2, but may be disposed on the right side of the engine body 2. Moreover, although the height at which the supercharger 11 and the intercooler 13 are arranged is preferably arranged above the reference height, it may be arranged below.

  In the above description, the flow of taking in seawater from the outside of the ship was described assuming a ship navigating the sea. However, when the ship navigates a lake or river, water such as a lake is taken in instead of seawater. Therefore, the fresh water cooler 23 described above can also be expressed as a component that performs heat exchange between cooling water and outboard water.

  In the components other than those described here, the shape of the component can be changed or the component can be omitted. In addition, the arrangement of components can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Oil pan 2 Engine main body 3 Cylinder block 4 Cylinder head 5 Cylinder head cover 6 Top cover 13 Intercooler 15 Intake manifold 16 Exhaust manifold 17 Mixing elbow 34, 35 Oil filter 43, 44 Fuel filter 100 Marine engine

Claims (4)

An engine body including a cylinder block and a cylinder head, and having a long side surface and a short side surface;
A turbocharger that uses exhaust gas to intake air,
An intercooler that flows in the gas that has passed through the supercharger and cools the gas;
A one-stage supercharged marine engine equipped with
The marine engine, wherein the supercharger and the intercooler are arranged side by side in the crankshaft direction on a side surface on the long side of the engine body. The marine engine according to claim 1,
A top cover covering the upper surface of the engine body;
When the height that bisects the center of the top surface that is the outer surface of the top cover and the bottom surface that is the opposite surface is a reference height, the supercharger and the intercooler are A marine engine that is arranged on the upper surface side of a reference height. The marine engine according to claim 2,
An oil filter disposed at one end of the crankshaft direction to remove foreign matter from engine oil;
A fuel filter disposed at the other end in the crankshaft direction to remove foreign matter from the fuel;
With
The marine engine, wherein the oil filter and the fuel filter are disposed on an upper surface side of the reference height. The marine engine according to claim 2 or 3,
A mixing elbow that mixes and discharges exhaust gas that has passed through the supercharger and water taken from outside the ship,
The mixing location of the exhaust gas and water taken from outside the ship, the supercharger, and the intercooler are arranged in the crankshaft direction, and the mixing location and the supercharger are adjacent to each other. A marine engine characterized by being arranged.

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