JPH11270338A - V-type engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a V-type engine capable of improving cooling efficiency with a simplified structure. SOLUTION: By utilizing the space forming in a V-shaped dell on the crest of a V-type engine, an upper channel 7 and a lower channel 8 of a vertical double layer structure are formed in the space and it is composed so that cooling water flows on the upper channel 7 in the longitudinal direction of the V-type engine to the lower channel 8 and cooling water reaching the lower channel 8 may flow into a cylinder liner water chamber 3. An oil cooler 5 (5a, 5b) is arranged on the upper channel 7 and the oil coolers 5a, 5b are cooled by the cooling water flowing on the upper channel 7 along the longitudinal direction of the oil coolers 5a, 5b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a V-type engine, and is particularly useful when applied to a cooling structure of an oil cooler.

[0002]

2. Description of the Related Art FIGS. 2A and 2B are explanatory views conceptually showing a V-type engine according to the prior art, wherein FIG. 2A is a front view, and FIG.
Is a side view. As shown in both figures, the V-type engine is such that cylinders 11 for each bank are arranged in a V-shape symmetrically on both left and right sides. Cylinder block 1
A water chamber 13 into which cooling water for cooling the cylinders 11 flows is formed in a cylinder liner disposed around each of the cylinders 11 formed in 2. On both sides of the cylinder block 12, cooling water channels 14 extending in the longitudinal direction are formed, and the cooling water is supplied to the water channels 14 through the cooling water supply ports 14a. The water passage 14 communicates with each of the water chambers 13 via a cooling water supply port 13a. Thus, the cooling water that has flowed into the water passage 14 through the cooling water supply port 14a flows into each of the water chambers 13 through the supply port 13a, and after cooling each of the cylinders 11, as shown by arrows in the drawing. It is designed to escape upward and flow into a cylinder block (not shown) fixed on the cylinder block 12. Oil cooler 1
5 is disposed in the water channel 14.

Therefore, in the prior art, the oil cooler 15 is cooled by exchanging heat with the cooling water flowing through the water passage 14.

FIG. 3 is an explanatory view conceptually showing another V-type engine according to the prior art, wherein FIG.
(B) is the figure seen from the side. As shown in both figures, the V-type engine is also similar to the V-type engine shown in FIG.
The cylinders 21 for each bank are symmetrically arranged on the left and right sides in a V-shape. Further, similarly to the V-type engine shown in FIG. 2, cooling water for cooling each cylinder 11 flows into a cylinder liner disposed around each cylinder 21 formed in the cylinder block 22. A chamber 23 is formed. On both sides of the cylinder block 22, cooling water channels 24 extending in the longitudinal direction are formed.
The cooling water is supplied to the water channel 24 via a cooling water supply port 24a provided at one location in the center. In the case of this example, a part of the water channel 24 is a part of each water chamber 23. Thus, the cooling water that has flowed into the water passage 24 flows into each of the water chambers 23 and cools each of the cylinders 21, and then, as shown by arrows in FIG. (Not shown).

[0005] The oil cooler 25 is a cylinder block 22.
The cooling water that has cooled the oil cooler 25 flows into the water channel 24 via a supply port 24 a provided at one position of the water channel 24.

[0006]

In the case of the prior art shown in FIG. 2, the cooling water flowing into the water chamber 13 in the longitudinal direction of the water chamber 13 changes its direction on the way and is supplied through the supply port 13a. The oil cooler 15 is cooled while reaching the chamber 13. That is, since the direction of the cooling water that exchanges heat with the oil cooler 15 also changes midway, there is a problem that the heat exchange efficiency is reduced as compared with the case where the cooling water always flows parallel to the longitudinal direction.

On the other hand, in the case of the prior art shown in FIG. 3, it is necessary to separately provide a pipe extending from the supply port 24a of the water channel 24 to the oil cooler 25, which causes a problem that the piping structure becomes complicated. .

In view of the above prior art, an object of the present invention is to provide a V-type engine capable of improving the cooling efficiency of an oil cooler with a simple structure.

[0009]

In order to achieve the above-mentioned object, the present invention comprises a V-shaped engine provided with a horizontal partition plate in a space between a V-shaped valley at the top of the V-shaped engine and an upper waterway and a lower waterway having a two-layer structure. A water channel is formed, and cooling water flows through the upper water channel in the longitudinal direction of the V-shaped engine to reach the lower water channel,
While the cooling water reaching the lower water channel is configured to flow into the water chamber of the cylinder liner through the cooling water supply port communicating with the water chamber of the cylinder liner, the oil cooler is disposed in the upper water channel. It is characterized by.

[0010] According to the present invention, the oil cooler is cooled by the cooling water flowing along the longitudinal direction of the V-shaped engine in the upper water passage, so that a long time for heat exchange with the cooling water can be maintained. Thus, efficient cooling of the oil cooler can be performed.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B are explanatory views conceptually showing an embodiment of the present invention. FIG. 1A is a diagram viewed from the front, and FIG. 1B is a diagram viewed from the side. As shown in both figures, a horizontal partition plate 6 is provided in a space serving as a V-shaped valley at the top of the V-shaped engine, and an upper water passage 7 and a lower water passage 8 of a two-layer structure extending in the longitudinal direction of the cylinder block 2. Are formed. A cooling water supply port 7 a is provided at one end of the upper water passage 7, and the other end thereof communicates with the lower water passage 8. As a result, the cooling water flows through the upper channel 7 in the longitudinal direction of the V-shaped engine to reach the lower channel 8.

A cylinder 1 and a water chamber 3 are formed in the cylinder block 2 as in the prior art shown in FIGS. 2 and 3, and each water chamber communicates with a lower water passage 8 via a supply port 3a. I have. Therefore, the cooling water from the upper water channel 7 to the lower water channel 8 flows into the water chamber 3 of each cylinder liner through each supply port 3a, and cools each cylinder 1 in the same manner as in the related art. As shown by an arrow in the figure, the liquid escapes upward and flows into a cylinder block (not shown) fixed on the cylinder block 2.

The oil coolers 5a and 5b are divided into two parts, and are arranged in the upper water passage 7 such that their longitudinal directions are parallel to the flow direction of the cooling water. Therefore, the oil coolers 5a and 5b exchange heat with the cooling water flowing through the upper water passage 7 and are cooled. Although not shown, the oil flowing through each of the oil coolers 5a and 5b in the present embodiment is the other oil cooler 5b or the oil cooler 5b.
a is bypassed so that oil can be continuously cooled even if one of them fails.

According to this embodiment, the oil cooler 5
a, 5b are cooling water flowing along the longitudinal direction of the V-shaped engine in the upper water channel 7, that is, the longitudinal direction of the oil coolers 5a, 5b without changing the flowing direction on the way as in the prior art shown in FIG. Cooled by cooling water flowing in parallel with This makes it possible to maintain a long time for heat exchange with the cooling water.

[0016]

As has been described in detail with the above embodiments, the present invention provides an upper channel and a lower layer of a two-layer structure by providing a horizontal partition plate in a space that is a V-shaped valley at the top of a V-type engine. A cooling water supply passage for forming a water passage and flowing through the upper water passage in the longitudinal direction of the V-shaped engine to reach the lower water passage, and the cooling water reaching the lower water passage communicates with the water chamber of the cylinder liner. And the oil cooler is arranged in the upper water chamber, so that the oil cooler flows through the upper water passage along the longitudinal direction of the V-shaped engine. Cooling. Therefore, the time for exchanging heat with the cooling water can be kept long, and the oil cooler can be efficiently cooled accordingly.

On the other hand, since the upper water channel and the lower water channel are formed by effectively utilizing the space between the V-shaped valleys of the V-shaped engine, which has been dead space in the prior art, special piping and the like are required. It can be realized as a simple structure.

[Brief description of the drawings]

FIG. 1 is an explanatory view conceptually showing an embodiment of the present invention,
(A) is the figure seen from the front, (b) is the figure seen from the side.

FIG. 2 is an explanatory view conceptually showing an example of a conventional technique;
(A) is the figure seen from the front, (b) is the figure seen from the side.

FIG. 3 is an explanatory view conceptually showing another example of the prior art;
(A) is the figure seen from the front, (b) is the figure seen from the side.

[Explanation of symbols]

 Reference Signs List 1 cylinder 2 cylinder block 3 water chamber 5a, 5b oil cooler 6 partition plate 7 upper channel 8 lower channel

Claims (1)

[Claims] A horizontal partition plate is provided in a space which is a V-shaped valley at the top of a V-shaped engine to form an upper channel and a lower channel of an upper and lower two-layer structure, and in a longitudinal direction of the V-shaped engine. The cooling water flows through the upper water channel to reach the lower water channel, and the cooling water that has reached the lower water channel flows into the water chamber of the cylinder liner via a cooling water supply port communicating with the water chamber of the cylinder liner. On the other hand, a V-type engine characterized in that an oil cooler is arranged in an upper waterway.