engine

Abstract

To provide an engine which is compact, and suppresses deterioration in air supply efficiency.SOLUTION: An engine 100 includes: a cylinder head 1 provided at a cylinder row 3 in which a plurality of cylinders are in a row; an inter-cooler provided on one end part side of the cylinder head 1 in the row direction of the cylinder row 3; an air supply manifold 13 for guiding supply air from the inter-cooler to the cylinder head 1; and a cooling pipeline 18 connected to the inter-cooler. The cylinder head 1, the air supply manifold 13 and the cooling pipeline 18 are arranged in the order of the cylinder head 1, the air supply manifold 13 and the cooling pipeline 18 in the width direction crossing the row direction of the cylinder row 3. The length in the width direction of the cross section crossing the row direction of the air supply manifold 13 is shorter than the length in the direction crossing the row direction and the width direction.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present invention relates to an engine. [Background technology]

[0002] An intercooler that cools intake air compressed by a turbocharger is known. As an example of the arrangement of an intake air passage including an intercooler, an engine described in Patent Document 1 has an intercooler arranged on one end side of the crankshaft direction of the engine, an intake manifold arranged on one side in a direction intersecting the crankshaft direction, and cooling piping connected to the intercooler arranged along the crankshaft direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2015 / 064449 Summary of the Invention [Problem to be solved by the invention]

[0004] In the engine described in Patent Document 1, an intake manifold is disposed between the cylinder head and the cooling pipes, so in order to reduce the width of the engine in the direction intersecting the crankshaft, it is necessary to reduce the thickness of the intake manifold in the direction intersecting the crankshaft. However, simply reducing the thickness of the intake manifold poses the problem of reduced air intake efficiency.

[0005] SUMMARY OF THE INVENTION In consideration of the above circumstances, an object of the present invention is to provide a compact engine that suppresses a decrease in air intake efficiency. [Means for solving the problem]

[0006] In order to solve the above problems, the engine of the present invention comprises a cylinder head provided in a cylinder row in which a plurality of cylinders are lined up, an intercooler provided on one end side of the cylinder head in the direction of the cylinder row, an intake manifold that guides intake air from the intercooler to the cylinder head, and cooling piping connected to the intercooler, wherein the cylinder head, the intake manifold, and the cooling piping are arranged in this order in a width direction that intersects the direction of the cylinder row, and the width direction length of a cross section of the intake manifold that intersects the direction of the cylinder row is shorter than the length in a direction that intersects the direction of the cylinder row and the width direction.

[0007] The intercooler may include an air intake outlet that discharges air into the air intake manifold and a liquid outlet that discharges liquid into the cooling piping, and the air intake outlet and the liquid outlet may be located on one side of the center of the intercooler in the width direction.

[0008] The intake manifold may have an intake passage that discharges intake air to the cylinder head, and the intake passage may be located to one side of the center of the intake manifold in a direction that intersects the column direction and the width direction, in a cross section that intersects the column direction.

[0009] The engine may include a fresh water cooler provided on the other end side of the cylinder head in the column direction, and the cooling pipe may be connected to the intercooler and the fresh water cooler.

[0010] The cooling piping may be supported by the intake manifold. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a compact engine in which a decrease in air supply efficiency is suppressed. [Brief explanation of the drawings]

[0012] [Figure 1]1 is a perspective view showing an engine according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing an intake and exhaust path according to an embodiment of the present invention. [Figure 3] FIG. 2 is a perspective view showing an intake and exhaust path according to an embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view showing a cooling pipe according to an embodiment of the present invention. [Figure 5] FIG. 2 is a perspective view showing an intercooler-side cover according to an embodiment of the present invention. [Figure 6] FIG. 2 is a perspective view showing a freshwater cooler side cover according to one embodiment of the present invention. [Figure 7] 1 is a perspective view showing a main part of a cooling pipe according to an embodiment of the present invention. [Figure 8] 1 is an exploded view showing a main part of a cooling pipe according to an embodiment of the present invention. [Figure 9] 1 is a side view showing a main part of a cooling pipe according to an embodiment of the present invention. [Figure 10] 1 is a perspective view showing an intake manifold according to an embodiment of the present invention; [Figure 11] 1 is a perspective view showing an intake manifold according to an embodiment of the present invention; [Figure 12] 2 is a cross-sectional view showing a cylinder head, an intake manifold, and cooling piping according to an embodiment of the present invention. FIG. [Figure 13] 1 is a plan view of an engine according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] An engine 100 according to one embodiment of the present invention will now be described with reference to the drawings.

[0014] First, the overall configuration of the engine 100 will be described. FIG. 1 is a perspective view showing the engine 100. In each drawing, U, Lo, L, R, Fr, and Rr indicate up, down, left, right, front, and rear, respectively. In this embodiment, an example is shown in which the cylinder head 1 is provided above the cylinder block 2, but the engine 100 may be used in any position. In addition, in this embodiment, an in-line six-cylinder diesel engine is shown as an example of an application of the present invention, but the present invention is suitable for all registered / promoted engines having multiple cylinders.

[0015] The engine 100 includes a cylinder head 1, a cylinder block 2, and an oil pan 5. The cylinder head 1 has six parts (not shown) arranged in series along the front-to-rear direction, including an intake passage, an exhaust passage, an intake valve, an exhaust valve, and an injector. The cylinder block 2 includes a cylinder bank 3 in which six cylinders (not shown), each housing a piston and a connecting rod, are arranged in series along the front-to-rear direction, and a crankcase 4 that houses a crankshaft (not shown). The oil pan 5 stores lubricating oil.

[0016] Next, the intake and exhaust paths will be described. Figures 2 and 3 are perspective views showing the intake and exhaust paths. The intake and exhaust paths include a turbocharger 11, an intercooler 12, an intake manifold 13, the cylinder head 1, and an exhaust manifold 14.

[0017] The turbocharger 11 includes a turbine 11T and a compressor 11C. The compressor 11C is connected to an intercooler 12. The intake manifold 13 includes a main body 13B, an intake air inlet 13i, and six intake air passages 13E. The intake air inlet 13i is connected to the intercooler 12. The six intake air passages 13E are connected to an intake air passage (not shown) of the cylinder head 1. The exhaust manifold 14 includes a collector 14C, six exhaust intakes 14i, and an exhaust discharge port 14E. The six exhaust intakes 14i are connected to an exhaust passage (not shown) of the cylinder head 1. The exhaust discharge port 14E is connected to the turbine 11T.

[0018] Exhaust air from the cylinders is supplied to the turbine 11T via the exhaust passage of the cylinder head 1 and the exhaust manifold 14. The turbine 11T is rotated by exhaust energy. The compressor 11C takes in and compresses air by rotating together with the turbine 11T. The compressed air is sent to the intercooler 12. The intercooler 12 cools the compressed air and sends it to the intake manifold 13. The intake manifold 13 functions as a surge tank, equalizing the density, intake volume, and airflow of the compressed air supplied to each cylinder, and supplies the compressed air to the intake passage of the cylinder head 1 via the intake passage 13E.

[0019] Next, an overview of the cooling piping 18 will be described. Figure 4 is a perspective view showing the cooling piping 18. A water supply pipe 16 equipped with a pump 17 is connected to the intercooler 12. The intercooler 12 cools the supply air using seawater sucked up by the pump 17. A freshwater cooler 15 is connected to the intercooler 12 via the cooling piping 18. The seawater used to cool the supply air in the intercooler 12 is supplied to the freshwater cooler 15 through the cooling piping 18. The freshwater cooler 15 cools the coolant circulating in a water jacket (not shown) provided on the engine 100 using the seawater supplied from the intercooler 12. The seawater used to cool the coolant in the freshwater cooler 15 is used to cool lubricating oil in an oil cooler (not shown) and then discharged overboard.

[0020] Next, the cooling piping 18 will be described in detail. Fig. 5 is a perspective view showing the intercooler side cover 21. Fig. 6 is a perspective view showing the freshwater cooler side cover 25. Fig. 7 is a perspective view showing the main parts of the cooling piping 18. Fig. 8 is an exploded view showing the main parts of the cooling piping 18. Fig. 9 is a side view showing the main parts of the cooling piping 18. Note that in Fig. 7, the connecting piping 23 and the metal piping 22 are provided before and after the sacrificial anticorrosion coated piping 24, but Fig. 8 only shows the sacrificial anticorrosion coated piping 24 and the connecting piping 23 and metal piping 22 in front of it.

[0021] The intercooler 12 (see FIGS. 4 and 5) includes an intercooler housing 20 and an intercooler-side cover 21 (an example of a flow path component) that closes an opening (not shown) provided on the left side of the intercooler housing 20.

[0022] The intercooler housing 20 has an air intake 20i and an air intake discharge port 20E. The air intake 20i is provided in the right part of the bottom of the intercooler housing 20. The air intake discharge port 20E is provided in a part to the left of the center C1 in the left-right direction of the intercooler housing 20. The air intake discharge port 20E opens upward and forward.

[0023] The intercooler-side lid 21 is generally circular and recessed to the left. The interior space of the intercooler-side lid 21 is divided by a partition wall 21W into a lower first sub-chamber 211 and an upper second sub-chamber 212. The first sub-chamber 211 is provided with a liquid inlet 21i penetrating in the left-right direction. The water supply pipe 16 is connected to the liquid inlet 21i. The second sub-chamber 212 is provided with a liquid outlet 21E penetrating in the front-rear direction. The rear end of the cooling pipe 18 is connected to the liquid outlet 21E. The first sub-chamber 211 and the second sub-chamber 212 are provided with spigots (not shown) penetrating from inside to outside. The spigots are female-threaded. A bolt-shaped sacrificial protective material 30 with a male thread is attached to the spigot. The sacrificial protective material 30 protrudes from the inner surfaces of the first sub-chamber 211 and the second sub-chamber 212. The sacrificial protective material 30 is made of zinc or iron. The zinc used is made primarily from high-purity zinc bullion with a purity of 99.99% or higher, while the iron used is pure iron with a purity of 99.90% or higher.

[0024] The freshwater cooler 15 (see FIGS. 4 and 6) comprises a freshwater cooler housing 26 and a freshwater cooler side lid 25 (an example of a flow path component) that closes an opening (not shown) provided at the left end of the freshwater cooler housing 26. The freshwater cooler side lid 25 is roughly circular and concave to the left. The internal space of the freshwater cooler side lid 25 is divided by a partition wall 25W into an upper first sub-chamber 251 and a lower second sub-chamber 252. The first sub-chamber 251 is provided with a liquid intake port 25i that penetrates in the front-to-rear direction. The front end of the cooling pipe 18 is connected to the liquid intake port 25i. The first sub-chamber 251 and the second sub-chamber 252 are provided with spigots (not shown) that penetrate from inside to outside. The spigots are female-threaded. The sacrificial protective material 30 described above is attached to the spigots. The sacrificial protective material 30 protrudes from the inner surfaces of the first sub-chamber 251 and the second sub-chamber 252.

[0025] The cooling pipe 18 (see FIGS. 4, 7 to 9) includes metal pipe 22 and sacrificial anticorrosion coated pipe 24. Seawater flows through the cooling pipe 18 from the intercooler 12 to the fresh water cooler 15. The metal pipe 22, sacrificial anticorrosion coated pipe 24, intercooler side lid 21, and fresh water cooler side lid 25 are arranged in the following order from the rear: intercooler side lid 21, metal pipe 22, sacrificial anticorrosion coated pipe 24, metal pipe 22, and fresh water cooler side lid 25.

[0026] The metal pipe 22 is made of iron. No sacrificial anticorrosion coating is formed on the inner circumferential surface of the metal pipe 22. The metal pipes 22 before and after the sacrificial anticorrosion coating pipe 24 have the same shape. Specifically, at least the shapes of both ends of the pipe and the pipe length are common, and they are configured to be interchangeable as cooling water pipes. Even if the shapes and arrangements of bosses formed on the pipe surface are different, they are considered to be of the same shape as long as they are interchangeable as cooling water pipes. The metal pipe 22 includes a pipe portion 22P, a flange 22F provided at one end of the pipe portion 22P in the front-rear direction, and a sleeve 22S provided at the other end of the pipe portion 22P. The inner diameter of the sleeve 22S is larger than the inner diameter of the pipe portion 22P. On the intercooler 12 side, the flange 22F is fastened to the liquid discharge port 21E of the intercooler-side cover 21 using bolts (neither of which is shown) via a gasket or an O-ring. On the fresh water cooler 15 side, the flange 22F is fastened to the liquid intake port 25i of the fresh water cooler side lid 25 using a bolt (neither of which is shown) via a gasket or an O-ring.

[0027] A bolt insertion portion 22A is provided near the end of the pipe portion 22P of the metal pipe 22 on the sleeve 22S side (see Figures 7 and 8). The bolt insertion portion 22A is a portion that bulges upward and downward from the outer peripheral surface of the pipe portion 22P. A bolt hole penetrating in the left-right direction is provided in the bolt insertion portion 22A. A female thread (not shown) is provided on the left side surface of the main body portion 13B of the air intake manifold 13 at a position corresponding to the bolt hole in the bolt insertion portion 22A. The metal pipe 22 is fixed to the air intake manifold 13 by fastening it to the air intake manifold 13 with a bolt (see Figure 2).

[0028] The sacrificial anticorrosion coated piping 24 is made of iron. The sacrificial anticorrosion coated piping 24 includes a pipe section 24P and flanges 24F provided at both ends of the pipe section 24P. The inner surface of the sacrificial anticorrosion coated piping 24 is subjected to a zinc plating process such as hot-dip galvanizing or electro-galvanizing. The zinc used is made primarily from high-purity zinc bullion with a purity of 99.99% or higher.

[0029] The metal pipe 22 and the sacrificially coated pipe 24 are connected using a connecting pipe 23. The connecting pipe 23 includes a pipe section 23P and a flange 23F provided at one end of the pipe section 23P in the front-rear direction. A circumferential groove 23G is provided on the outer peripheral surface of the other end of the pipe section 23P, into which an O-ring 23R (see FIG. 9) fits. When the other end of the connecting pipe 23 is inserted into the sleeve 22S of the metal pipe 22, the O-ring 23R is pressed against the inner peripheral surface of the sleeve 22S, preventing seawater leakage. The connecting pipe 23 is slidable in the front-rear direction along the inner peripheral surface of the sleeve 22S. The flange 23F of the connecting pipe 23 is fastened to the flange 24F of the sacrificially coated pipe 24 using bolts (neither of which is shown) via a gasket or an O-ring.

[0030] The sacrificial anticorrosion coated piping 24 is fixed to the air intake manifold 13 by fixing members 24M (see FIGS. 2 and 7). The fixing members 24M are, for example, metal bands. In this example, the fixing members 24M are composed of two bands connected with bolts and nuts, but the fixing members 24M may also be composed of a single band. The fixing members 24M are wrapped around the pipe portion 24P of the sacrificial anticorrosion coated piping 24. Both longitudinal ends of the fixing members 24M are bent to fit along the left side surface of the main body portion 13B of the air intake manifold 13 and are provided with bolt holes penetrating in the left-right direction. A female thread is provided on the left side surface of the main body portion 13B of the air intake manifold 13 at a position corresponding to the bolt hole of the fixing members 24M (not shown). The sacrificial anticorrosion coated piping 24 is fixed to the air intake manifold 13 by fastening it to the air intake manifold 13 with bolts.

[0031] Seawater that flows from the water supply pipe 16 into the first sub-chamber 211 through the liquid intake 21i of the intercooler-side lid 21 cools the compressed air while flowing along a flow path (not shown) in the intercooler housing 20, and then flows from the second sub-chamber 212 through the liquid discharge port 21E into the cooling piping 18. Seawater that flows from the cooling piping 18 into the first sub-chamber 251 through the liquid intake 25i of the freshwater cooler-side lid 25 passes over the bulkhead 25W and flows into the second sub-chamber 252, cools the coolant while flowing along a flow path (not shown) in the freshwater cooler 15, and is then discharged overboard through the liquid discharge port 26E and the oil cooler (not shown).

[0032] Next, the intake manifold 13 will be described in detail. Figures 10 and 11 are perspective views showing the intake manifold 13. Figure 12 is a cross-sectional view showing the cylinder head 1, the intake manifold 13, and the cooling piping 18. Figure 13 is a plan view of the engine 100.

[0033] The engine 100 comprises a cylinder head 1 provided in a cylinder row 3, which is a row of multiple cylinders; an intercooler 12 provided at one end of the cylinder head 1 in the direction of the cylinder row 3; an intake manifold 13 that guides intake air from the intercooler 12 to the cylinder head 1; and cooling piping 18 connected to the intercooler 12. The cylinder head 1, intake manifold 13, and cooling piping 18 are arranged in this order in a width direction that intersects with the direction of the cylinder row 3, and the width direction length of the cross section of the intake manifold 13 that intersects with the direction of the cylinder row is shorter than the length in the direction that intersects with the row and width directions.

[0034] The intake manifold 13 (see FIGS. 10 and 11) includes a main body 13B, an intake air inlet 13i, and six intake air passages 13E. The main body 13B has a shape in which the upper part of the front end of a rectangular parallelepiped that is elongated in the front-rear direction is deformed into a sloped surface that slopes downwards toward the front. The inside of the main body 13B is hollow. A cross section (see FIG. 12) of the main body 13B that intersects the front-rear direction (the direction of the cylinder rows 3) is a rectangle that is elongated in the up-down direction. In other words, the width of the cross section of the main body 13B that intersects the direction of the cylinder rows is shorter than the length in the direction that intersects the width direction (the up-down direction). The rear end of the main body 13B is provided with an intake air inlet 13i that protrudes rearward. The intake air inlet 13i is connected to an intake air discharge port 20E of the intercooler 12.

[0035] Six air supply passages 13E protruding to the right are arranged in a row in the front-rear direction on the right side surface of the main body 13B. The air supply passages 13E are arranged below the center C2 in the vertical direction of the main body 13B (see FIG. 12). In other words, in a cross section intersecting the direction of the cylinder row 3, the air supply passages 13E are arranged to one side (in this example, below) the center C2 in the direction intersecting the width direction of the main body 13B. Therefore, the portion of the main body 13B above the center C2 in the vertical direction functions as a surge tank that equalizes the density, intake air volume, and air flow of the compressed air supplied to each cylinder. The six air supply passages 13E are connected to an air supply passage (not shown) of the cylinder head 1.

[0036] The cylinder head 1, intake manifold 13, and cooling pipes 18 (see Figures 8 and 9) are arranged in this order in a width direction that intersects with the row direction of the cylinder rows 3. The intake air discharge port 20E and liquid discharge port 21E (see Figure 9) of the intercooler 12 are provided on one side (in this example, the left side) of the center C1 of the intercooler 12 in the width direction.

[0037] The engine 100 according to the present embodiment described above includes a cylinder head 1 provided in a cylinder row 3, which is a row of multiple cylinders, an intercooler 12 provided at one end of the cylinder head 1 in the direction of the cylinder row 3, an intake manifold 13 that guides intake air from the intercooler 12 to the cylinder head 1, and a cooling pipe 18 connected to the intercooler 12, and the cylinder head 1, intake manifold 13, and cooling pipe 18 are arranged in this order in a width direction that intersects the direction of the cylinder row 3, and the width direction of the cross section of the intake manifold 13 that intersects the direction of the cylinder row 3 is shorter than the length in the direction that intersects the row and the width direction. This configuration makes it possible to provide a compact engine 100 that suppresses a decrease in intake efficiency.

[0038] Furthermore, in the engine 100 according to this embodiment, the intercooler 12 is provided with an intake air discharge port 20E that discharges intake air into the intake manifold 13 and a liquid discharge port 21E that discharges liquid into the cooling pipe 18, and the intake air discharge port 20E and the liquid discharge port 21E are provided on one side of the center C1 in the width direction of the intercooler 12. With this configuration, the cylinder head 1, the intake air manifold 13, and the cooling pipe 18 can be arranged neatly and compactly in the width direction.

[0039] Furthermore, in engine 100 according to this embodiment, intake manifold 13 includes intake passage 13E that discharges intake air to cylinder head 1, and intake passage 13E is located on one side of center C2 in a direction intersecting the width direction of intake manifold 13 in a cross section intersecting the column direction. With this configuration, of the two spaces bounded by center C2 in a direction intersecting the width direction of intake manifold 13, the space on the side where intake passage 13E is not located functions as a surge tank, making it possible to uniform the density of compressed air supplied to each cylinder, the amount of intake air, and the airflow.

[0040] Furthermore, the engine 100 according to this embodiment is equipped with a fresh water cooler 15 provided on the other end side of the cylinder head 1 in the column direction, and the cooling piping 18 is connected to the intercooler 12 and the fresh water cooler 15. With this configuration, the overall height or width of the engine 100 can be reduced compared to when the intercooler 12 or the fresh water cooler 15 is arranged on top of the cylinder head 1 or when it is arranged to the side of the cylinder head 1 in the width direction.

[0041] Furthermore, in engine 100 according to this embodiment, cooling pipe 18 is supported by intake manifold 13. This configuration prevents cooling pipe 18 from colliding with intake manifold 13 and being damaged by vibrations of engine 100. This allows cooling pipe 18 and intake manifold 13 to be positioned closer to each other, allowing engine 100 to be made more compact.

[0042] The above embodiment may be modified as follows.

[0043] In the above embodiment, seawater is shown as an example of the liquid flowing through the metal pipe 22, but the liquid may be fresh water, tap water, or the like. For example, the present invention may be applied to a configuration in which a power generation engine 100 grounded on land is cooled using fresh water or tap water stored in a pit. Furthermore, the liquid may be any substance other than water as long as it contains a component that corrodes the metal pipe 22.

[0044] In the above embodiment, the intercooler 12, the fresh water cooler 15, and the oil cooler are shown as examples of devices connected to the cooling pipe 18, but the device connected to the cooling pipe 18 may be any device that uses liquid to cool engine parts.

[0045] In the above embodiment, an example has been shown in which the intercooler 12 is disposed behind the engine 100 and the fresh water cooler 15 is disposed in front of it, but the fresh water cooler 15 may be disposed behind the engine 100 and the intercooler 12 may be disposed in front of it. Also, in the above embodiment, an example has been shown in which seawater is supplied from the intercooler 12 to the fresh water cooler 15, but seawater may be supplied from the fresh water cooler 15 to the intercooler 12.

[0046] In the above embodiment, an example has been shown in which the air supply passage 13E is provided below the center C2 in the vertical direction of the main body 13B, but the air supply passage 13E may be provided above the center C2 in the vertical direction of the main body 13B. In this case, the portion of the main body 13B below the center C2 in the vertical direction functions as a surge tank. [Explanation of symbols]

[0047] 100 Engine 1. Cylinder head 3-cylinder row 12 Intercooler 13 Air intake manifold 13E Air supply passage 15 Shimizu Cooler 18 Cooling piping 20E Air supply outlet 21E Liquid outlet C1 Center of intercooler width C2 Center of the intake manifold in the direction crossing the width direction

Claims

1. a cylinder head provided in a cylinder row in which a plurality of cylinders are arranged; an intercooler provided on one end side of the cylinder head in the direction of the cylinder row; a fresh water cooler provided on the other end side of the cylinder head; an intake manifold that guides intake air from the intercooler to the cylinder head; a cooling pipe connecting the intercooler and the fresh water cooler, The liquid that has passed through the cooling pipe is used for cooling in the fresh water cooler or the intercooler and then discharged to the outside, the cylinder head, the intake manifold, and the cooling pipes are arranged in this order in a width direction intersecting the row direction of the cylinder row, an intake manifold having a cross section intersecting the row direction, the cross section having a widthwise length shorter than a cross section intersecting the row direction and the widthwise direction;

2. The intercooler is an intake air discharge port that discharges intake air into the intake air manifold; a liquid discharge port that discharges the liquid into the cooling pipe, 2. The engine according to claim 1, wherein the air discharge port and the liquid discharge port are provided on the same side of the center of the intercooler in the width direction as a boundary.

3. the intake manifold includes an intake passage that discharges intake air to the cylinder head, 3. The engine according to claim 1, wherein the intake passage is provided on the same side as the intake passage of the cylinder head, with the center of the intake manifold in a direction intersecting the width direction as a boundary, in a cross section intersecting the column direction.

4. 4. An engine according to claim 1, wherein the cooling pipe is supported by the intake manifold.

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