JP2012062874A - V-engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a V-engine capable of lessening a volume of an engine and restraining cost of used components in a multi-cylinder engine having conventionally-prepared equipment such as a supercharger and an intercooler.SOLUTION: In the V-engine 1 having a pair of cylinder rows extended at a left and right side, the V-engine 1 includes air supply manifold 12A and 12B respectively arranged at upper parts of left and right cylinder heads 2A and 2B and having air supply passages 41A and 41B, the superchargers 13 and 13 supplying by pressurizing air supply to the air supply manifolds 12A and 12B, the intercooler 14 for cooling the air supply supercharged from the superchargers 13 and 13 with cooling water, a cooling water cooler 15 for cooling the cooling water having passed the intercooler 14, and a first cooling water passage 17 and a second cooling water passage 18 for connecting between the cooling water cooler 15 and the intercooler 14. The first cooling water passage 17 and the second cooling water passage 18 are respectively and integrally arranged on the air supply manifolds 12A and 12B extended at the left and right side.

Description

  The present invention relates to a V-type engine that includes a supercharger that supplies pressurized air under pressure and an intercooler that cools the air supplied from the supercharger with cooling water.

  Conventionally, a V-type engine including a pair of left and right cylinder rows has been publicly known. Some engines (internal combustion engines) include a supercharger that pressurizes and supplies air supply in order to achieve high output while satisfying weight reduction and downsizing, and also includes such a supercharger. Some engines include an intercooler (supply air cooler) for cooling the supply air supercharged from the supercharger with cooling water.

  Thus, when the engine is provided with a supercharger and an intercooler, piping for connecting the air supply system of the engine to the supercharger, the intercooler, and the like is required. In addition to a supercharger and an intercooler, the engine is provided with various devices such as a cooling water cooler for cooling cooling water (fresh water or the like) supplied into the engine, an air supply manifold, and the like.

  Various types of equipment equipped in such an engine are generally mounted outside the cylinder block or cylinder head of the engine, taking into account the flow of intake / exhaust flow and weight, and the external dimensions of the engine. Respectively. In particular, for engines mounted on ships, etc., where the engine room is small and the installation space for the engine is large, there are large restrictions on the outer dimensions, and there is a demand for compactness and low line (reducing the overall height). Since it is strong, various techniques have been disclosed to meet such demands (see, for example, Patent Document 1).

JP 2005-299393 A

  By the way, the conventional V-shaped engine is a first cooling water passage for sending the cooling water cooled from the cooling water cooler to the intercooler, or for sending the cooling water used in the intercooler to the cooling water cooler. As the second cooling water passage, a pipe was provided around the engine. However, providing the piping around the engine increases the volume of the engine. In addition, since the distance between the cooling water cooler and the intercooler is increased, the part processing time and cost are increased.

  In view of this, the present invention provides a V-type engine that can reduce the volume of components by reducing the volume of the engine in a multi-cylinder engine including conventional devices such as a supercharger and an intercooler.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, in a V-type engine having a pair of left and right cylinder rows, an air supply manifold provided at the upper part of the left and right cylinder heads and having an air supply passage, and air supply to the air supply manifold are added. A supercharger that is supplied under pressure, an intercooler that cools the air supplied from the supercharger with cooling water, a cooling water cooler that cools cooling water that has passed through the intercooler, and the cooling water cooler And a first cooling water passage and a second cooling water passage connecting the intercooler, and the first cooling water passage and the second cooling water passage are connected to the left and right air supply manifolds. Each is provided integrally.

  According to a second aspect of the present invention, the first cooling water passage and the second cooling water passage are arranged above the air supply manifold and adjacent to the air supply passage.

  According to a third aspect of the present invention, the two air supply manifolds have the same shape.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, space can be saved as compared with the case where the cooling water passage is provided separately from the air supply manifold. Further, by attaching the air supply manifold to the engine, the cooling water passage can be attached to the engine, and one assembly process can be omitted.

  According to the second aspect, space can be saved as compared with the case where the cooling water passage is provided separately from the air supply manifold. Further, the supply air in the supply passage can be cooled.

  According to the third aspect of the present invention, it is possible to reduce the number of types of parts and to reduce the cost by using the air supply manifold having the same shape.

1 is a front perspective view showing an overall configuration of a V-shaped engine according to an embodiment of the present invention. The rear perspective view which showed the whole structure of V type engine. The top view of a V type engine. AA 'line sectional view of a V type engine. B-C partial enlarged view of a V-type engine. The perspective view of an air supply manifold. The front view of a V type engine. The rear view of a V type engine. The right side view of a V type engine.

  Next, embodiments of the invention will be described.

First, a V-type engine 1 according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3.
A V-type engine 1 according to an embodiment of the present invention is a V-type engine including a pair of left and right cylinder rows. Here, as indicated by the arrows in FIG. 1, the left and right directions and the up and down directions are defined with the crankshaft center direction as the front and rear direction. As shown in FIGS. 1 and 2, the V-type engine 1 is provided at the upper part of the left and right cylinder heads 2A and 2B, and has air supply manifolds 12A and 12B having air supply passages 41A and 41B (see FIG. 4). , Superchargers 13 and 13 that supply the pressurized air to the supply manifolds 12A and 12B, an intercooler 14 that cools the air supplied from the superchargers 13 and 13 with cooling water, and an intercooler A cooling water cooler 15 for cooling the cooling water that has passed through 14, a first cooling water passage 17 and a second cooling water passage 18 (see FIG. 4) that connect the cooling water cooler 15 and the intercooler 14. .

  The V-shaped engine 1 includes a cylinder block 3 that extends long in the front-rear direction. Inside the cylinder block 3, a pair of left and right cylinders (cylinders) are arranged. Cylinder heads 2 </ b> A and 2 </ b> B are provided at the upper end of the cylinder block 3. The cylinder heads 2A and 2B are provided along the cylinder block 3, and are formed long in the front-rear direction.

  The cylinder heads 2A and 2B are formed with an air supply port and an exhaust port (not shown). Each air supply port has one end connected to a combustion chamber in each cylinder (not shown), and the other end connected to each branch pipe portion 42, 42,... (See FIG. 5) of the air supply manifolds 12A, 12B. . One end of each exhaust port on the cylinder heads 2A and 2B side is connected to a combustion chamber in each cylinder (not shown) on the cylinder heads 2A and 2B side, and the other end is connected to a branch pipe portion of the exhaust manifolds 19A and 19B. Yes.

  As shown in FIGS. 7 and 8, a crankshaft 4 is provided in the cylinder block 3 so as to extend in the front-rear direction substantially horizontally. A flywheel 5 is provided at the rear end of the crankshaft 4. Is attached. The flywheel 5 is covered with a flywheel housing 6 fixed to the rear side of the cylinder block 3. The rear end surface of the flywheel housing 6 is an output side end surface of the V-type engine 1.

As shown in FIGS. 1, 2, and 6, air supply manifolds 12A and 12B are provided above the left and right cylinder heads 2A and 2B, respectively. Further, exhaust manifolds 19A and 19B are provided below the left and right cylinder heads 2A and 2B.
Two air supply inlets 24A and 24B for connecting to the intercooler 14 are provided on the rear upper surfaces of the air supply manifolds 12A and 12B.
Exhaust outlets 25 and 25 for connecting to the superchargers 13 and 13 are provided at the rear ends of the exhaust manifolds 19A and 19B, respectively.

An intercooler 14 is disposed on the same side as the flywheel housing 6 on the rear end side of the air supply manifolds 12A and 12B.
The intercooler 14 is a so-called water-cooled cooler, and cooling water is supplied from the cooling water cooler 15. Inside the intercooler 14, heat exchange is performed between the supply air whose temperature has increased due to compression by the superchargers 13 and 13 and the cooling water.
As shown in FIGS. 1 and 8, the intercooler 14 includes air supply outlets 31 and 31 for connecting one end of the air supply pipes 26 </ b> A and 26 </ b> B that connect the air supply manifolds 12 </ b> A and 12 </ b> B and the intercooler 14. The left and right supply inlets 32, 32 connected to the supply passage pipes 27, 27, the first cooling water hole 36 connecting one end of the second pipe 52, and the second connection connecting one end of the third pipe 53. Cooling water hole 37.

  Two air supply outlets 31 and 31 are provided on the front surface of the intercooler 14. Two air supply inlets 32 and 32 are provided in the lower part of the intercooler 14, and it is provided so that the opening surface may face the left-right direction, respectively. One end of an air supply pipe 26A is connected to the air supply outlet 31, and the other end is connected to an air supply inlet 24A of the air supply manifold 12A. Further, one end of an air supply pipe 26B is connected to the other air supply outlet 31, and the other end is connected to an air supply inlet 24B of the air supply manifold 12B.

As shown in FIG. 1 and FIG. 3, the air supply / feed pipes 26 </ b> A and 26 </ b> B are bent pipes and are provided above the V-type engine 1. One end of each of the air supply pipes 26A and 26B is connected to the air supply outlets 31 and 31, and the other end is connected to the air supply inlets 24A and 24B of the air supply manifolds 12A and 12B.
Further, as shown in FIGS. 2 and 8, the air supply passage pipes 27 and 27 are bent pipes and are provided behind the V-type engine 1. One end of each of the air supply passage pipes 27 and 27 is connected to the air supply outlets 61 and 61 of the supercharger, and the other end is connected to the air supply inlets 32 and 32 of the intercooler 14.

  The first cooling water hole 36 is provided on the upper right side of the intercooler 14, and the second cooling water hole 37 is provided on the upper left side of the intercooler 14. A cooling water passage (not shown) that connects the first cooling water hole 36 and the second cooling water hole 37 is provided inside the intercooler 14.

  The supply air whose temperature has increased due to the compression by the superchargers 13 and 13 is sent to the inside of the intercooler 14 through the supply passage pipes 27 and 27. Inside the intercooler 14, the supply air is cooled by the cooling water sent from the second pipe 52 to the inside of the intercooler 14.

As shown in FIGS. 2 and 3, superchargers 13 and 13 are arranged at the rear ends of the exhaust manifolds 19A and 19B so that their rotational axes are parallel to the longitudinal direction of the exhaust manifolds 19A and 19B. Has been.
Further, the superchargers 13 and 13 and the intercooler 14 are connected by air supply passage pipes 27 and 27. The air supply passage pipes 27 and 27 are arranged so as to bypass the rear of the cylinder heads 2A and 2B, and press upward. In addition, piping is made using a free space on the rear side of the cylinder heads 2A and 2B, and the rearward protrusion is suppressed.

  Further, a cooling water cooler 15 that cools the cooling water of fresh water supplied to the V-type engine 1 is provided on the front side of the cylinder heads 2A and 2B. ing. An oil cooler 16 is disposed adjacent to the cooling water cooler 15 on the front side of the cylinder heads 2A and 2B.

Next, the air supply manifolds 12A and 12B will be described with reference to FIGS. As shown in FIG. 6, the air supply manifolds 12 </ b> A and 12 </ b> B are formed of a rectangular parallelepiped portion that is long in the front-rear direction, and a plurality of branch pipe portions 42 that protrude downward from the lower surface of the rectangular parallelepiped shape. And is formed of a casting. The air supply manifold 12A and the air supply manifold 12B have the same shape. By using the air supply manifold having the same shape, the number of types of parts can be reduced and the cost can be reduced.
In addition, as shown in FIG. 3, the right supply manifold 12A is displaced forward from the left supply manifold 12B.

  Two air supply inlets 24A and 24B for connecting to the intercooler 14 are provided on the rear upper surfaces of the air supply manifolds 12A and 12B. The air supply inlet 24A is arranged on the center side in the front-rear direction of the air supply manifolds 12A and 12B as compared to the air supply inlet 24B. The length by which the air supply inlet 24A is displaced toward the center in the front-rear direction of the air supply manifolds 12A and 12B is substantially equal to the length by which the right air supply manifold 12A is displaced forward from the left air supply manifold 12B. With this configuration, the right supply manifold 12A is arranged in front of the left supply manifold 12B. However, the distance between the supply inlet 24A and the supply outlet 31 and the supply inlet 24B are arranged. Since the distance between the air supply outlet 31 and the air supply outlet 31 is equal, the air supply pipes 26A and 26B can have the same shape.

  The air supply inlet 24B of the air supply manifold 12A is closed by a lid member. The supply air inlet 24A of the supply manifold 12B is closed by a lid member. With this configuration, even when the air supply manifold 12A and the air supply manifold 12B have the same shape, the air supply inlet 24A or the air supply that is not connected to the air supply pipes 26A and 26B is used. It is possible to prevent the supply of air from the inlet 24B.

  The air supply manifolds 12A and 12B have air supply passages 41A and 41B as shown in FIGS. The supply passages 41 </ b> A and 41 </ b> B are provided in the front-rear direction inside the supply manifolds 12 </ b> A and 12 </ b> B and at the inner upper portion of the V-type engine 1. Further, the supply passages 41A and 41B are connected to a plurality of branch pipe portions 42, 42,... For connecting to the supply ports of the respective cylinders.

As shown in FIGS. 4 and 5, the air supply manifold 12 </ b> A has a first cooling water passage 17. The first cooling water passage 17 is arranged outside the air supply passage 41A so as to be parallel to the air supply passage 41A. As shown in FIGS. 4 and 5, the first cooling water passage 17 is formed in a substantially quadrangular cross section.
As shown in FIGS. 2 and 9, the front end of the first coolant passage 17 is connected to the coolant cooler 15 via the first pipe 51. The rear end of the first cooling water passage 17 is connected to the intercooler 14 via the second pipe 52 as shown in FIGS. 1 and 2.

The first pipe 51 is provided in the upper right front part of the V-shaped engine 1, one end is connected to a hole provided in the upper surface of the cooling water cooler 15, and the other end is the front end of the first cooling water passage 17. It is connected to a hole provided on the right side of the unit.
The second pipe 52 is provided at the upper right rear portion of the V-type engine 1, one end is connected to a hole provided at the rear end of the first cooling water passage 17, and the other end of the intercooler 14. It is connected to a first cooling water hole 36 provided on the right side surface.

The air supply manifold 12 </ b> B has a second cooling water passage 18. The second cooling water passage 18 is disposed outside the air supply passage 41B so as to be parallel to the air supply passage 41B. As shown in FIGS. 4 and 5, the second cooling water passage 18 is formed in a substantially quadrangular cross section.
As shown in FIGS. 1 and 2, the rear end of the second cooling water passage 18 is connected to the intercooler 14 via a third pipe 53. Further, the front end of the second cooling water passage 18 is connected to the cooling water passage in the oil cooler 16 via a fourth pipe 54 as shown in FIGS. 1 and 2.

The third pipe 53 is provided in the upper left rear part of the V-shaped engine 1, one end is connected to the second cooling water hole 37 provided in the right side surface of the intercooler 14, and the other end is the second It is connected to a hole provided at the rear end of the cooling water passage 18.
The fourth pipe 54 is provided at the upper right front portion of the V-shaped engine 1, one end is connected to a hole provided at the front end of the second cooling water passage 18, and the other end is the upper surface of the oil cooler 16. It is connected to the hole provided in the.

Next, the superchargers 13 and 13 will be described.
The V-type engine 1 according to the present embodiment employs a so-called twin turbo having a pair of superchargers 13 and 13 for pressurizing supply air supplied into the V-type engine 1. The two superchargers 13, 13 include an air supply outlet 61 for connecting to the air supply passage pipes 27, 27 and a discharge pipe 62. The supply air pressurized by each of the superchargers 13 and 13 is sent to the intercooler 14 through the supply passage pipes 27 and 27.

As shown in FIGS. 1 and 2, each of the superchargers 13 and 13 has a turbine 63 and a compressor 64. The turbine 63 and the compressor 64 have the same rotating shaft, and the exhaust manifold 19A. It is connected in parallel with the longitudinal direction of 19B.
Each turbine 63 is communicated with the exhaust outlets 25 and 25 opened at the rear ends of the exhaust manifolds 19A and 19B. The exhaust gas after combustion introduced from the exhaust manifolds 19A and 19B rotates the turbine 63. Excess exhaust is discharged through a discharge pipe 62. The exhaust pipe 62 is provided behind the turbine 63, is bent so that the opening thereof faces upward, and is connected to an exhaust purification device and a silencer (not shown).

  Further, the compressor 64 introduces clean air from the outside through an outside air inlet 67 provided at the front end of the supercharger 13 and an air cleaner (not shown). Further, the compressor 64 rotates the compressor 64 by the rotation of the turbine 63 to compress the air sucked from the outside air introduction port 67, and passes from the air supply outlet 61 to the intercooler 14 via the air supply passage pipes 27 and 27. Send it in. The supply air whose temperature has increased due to the compression is cooled in the intercooler 14 and then sent as compressed air to the cylinders of the cylinder heads 2A and 2B through the supply manifolds 12A and 12B.

  In the V-type engine 1 having such a configuration, the cooling water for cooling various devices included in the V-type engine 1 flows through the following paths and cools the various devices. That is, the cooling water cooled by external seawater or the like in the cooling water cooler 15 flows into the first pipe 51. The cooling water flowing into the first pipe 51 flows into the first cooling water passage 17 and cools the air supply in the adjacent air supply passage 41A. The cooling water flows from the rear end of the first cooling water passage 17 into the second pipe 52. The cooling water that has flowed into the second pipe 52 flows into the intercooler 14, and cools the air with increased temperature that is pressure-fed from the superchargers 13 and 13. The cooling water flows from the intercooler 14 into the third pipe 53. The cooling water flowing into the third pipe 53 flows into the second cooling water passage 18 and cools the air supply in the adjacent air supply passage 41B. The cooling water flows from the front end of the second cooling water passage 18 into the fourth pipe 54. The cooling water flowing into the fourth pipe 54 flows into the cooling water passage in the oil cooler 16, cools the lubricating oil, and flows into the cooling water cooler 15 again.

  With this configuration, the supply air whose temperature has increased due to compression is first cooled by the cooling water in the intercooler 14. Further, the supply air flowing into the supply manifolds 12A and 12B is cooled by the cooling water flowing through the first cooling water passage 17 and the second cooling water passage 18 in the supply manifolds 12A and 12B.

As described above, the V-type engine 1 is provided in the upper part of the left and right cylinder heads 2A and 2B in the V-type engine 1 having a pair of left and right cylinder rows, and has an air supply passage 41A and 41B. 12B, superchargers 13 and 13 that pressurize and supply air to the air supply manifolds 12A and 12B, and an intercooler 14 that cools the air supplied from the superchargers 13 and 13 with cooling water. A cooling water cooler 15 that cools the cooling water that has passed through the intercooler 14, a first cooling water passage 17 that connects the cooling water cooler 15 and the intercooler 14, and a second cooling water passage 18. The first cooling water passage 17 and the second cooling water passage 18 are provided integrally with the left and right air supply manifolds 12A and 12B, respectively.
By comprising in this way, a space can be saved compared with the case where the first cooling water passage 17 and the second cooling water passage 18 are provided separately from the supply manifolds 12A and 12B. Further, by attaching the air supply manifolds 12A and 12B to the V-type engine 1, the first cooling water passage 17 and the second cooling water passage 18 can be attached to the V-type engine 1, and one assembly process is omitted. can do.

The first cooling water passage 17 and the second cooling water passage 18 are arranged above the air supply manifolds 12A and 12B and adjacent to the air supply passages 41A and 41B.
By comprising in this way, a space can be saved compared with the case where the first cooling water passage 17 and the second cooling water passage 18 are provided separately from the supply manifolds 12A and 12B. Further, the supply air in the supply passages 41A and 41B can be cooled.

The two air supply manifolds 12A and 12B have the same shape.
By configuring in this way, the number of types of parts can be reduced and costs can be reduced by using an air supply manifold having the same shape.

DESCRIPTION OF SYMBOLS 1 V type engine 2A * 2B Cylinder head 12A * 12B Air supply manifold 13 Supercharger 14 Intercooler 15 Cooling water cooler 16 Oil cooler 17 1st cooling water path 18 2nd cooling water path 41A * 41B Supply air path

Claims (3)

In a V-type engine having a pair of left and right cylinder rows,
An air supply manifold provided at the upper part of each of the left and right cylinder heads and having an air supply passage;
A supercharger that pressurizes and supplies air to the air supply manifold;
An intercooler that cools the air supplied from the supercharger with cooling water;
A cooling water cooler for cooling the cooling water that has passed through the intercooler;
A first cooling water passage and a second cooling water passage connecting the cooling water cooler and the intercooler;
With
The first cooling water passage and the second cooling water passage are provided integrally with the left and right air supply manifolds, respectively.
V-shaped engine. The first cooling water passage and the second cooling water passage are arranged at an upper portion of the air supply manifold and adjacent to the air supply passage.
The V-shaped engine according to claim 1. The two air supply manifolds have the same shape,
The V-shaped engine according to claim 1 or 2.

Images