JPH06257429A - Cooling system for engine - Google Patents

Abstract

PURPOSE:To make respective cylinder heads and a thermo case independently detachable, by integrally forming leading-in and discharge caps by a linking part, and providing an bleeder passage, communicating between the leading-in and discharge cap insides, on the linking part. CONSTITUTION:A V type engine 2 is provided with primary and secondary side cylinder heads 6 and 8 and primary and secondary side engine banks 14 and 16 on the upper part of a cylinder block 4. A cooling water leading-in pipe 24 and a cooling water discharge pipe are arranged in a bank space S. A leading-cap 30, communicated with the cooling water leading-in pipe 24, and a discharge cap 28, communicated with the cooling water discharge pipe, are arranged on one side of the bank space S. The leading-in cap 30 and the discharge cap 28 are linked by a link part 34 to be integrally formed. A bleeder passage 36, communicating between the leading-in cap 30 inside and the discharge cap 28 inside, is provided on the link part 34. Consequently, the water filling work of cooling water can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine cooling device, and more particularly to an engine cooling device in which each cylinder head and thermo case can be independently attached and detached.

[0002]

2. Description of the Related Art As an engine, there are an engine having cylinders arranged in series, an engine having cylinders opposed to each other, a V-type engine having cylinders arranged in a V shape, and the like.

As shown in FIGS. 5 to 7, the V-type engine has primary and secondary side cylinder heads 106 and 108, and primary and secondary side cylinder head covers 110 and 112 above the cylinder block 104. It has primary side and secondary side engine banks 114 and 116 that are mounted and configured.

A V-shaped bank space S is provided between the primary engine bank 114 and the secondary engine bank 116.
Is formed.

An intake pipe (not shown) and the like are arranged in the bank space S, and a cooling water introduction pipe 124 for introducing cooling water to the V-type engine 102 side and cooling water V
A cooling water discharge pipe 122 for discharging from the engine 102 side to a radiator (not shown) side is arranged.

Further, as a water-cooling type cooling device for a V-type engine, as disclosed in Japanese Patent Laid-Open No. 2-305310, cooling water is attached to each mounting portion of a thermostat interposed between an engine and a radiator. In a water-cooled cooling device in which an introduction pipe and a cooling water outlet pipe are connected via respective mounting flanges, each mounting portion of the thermostat case is formed continuously and integrally, while each of the cooling water inlet pipe and the cooling water outlet is formed. There was one in which the mounting flanges were integrally connected so as to correspond to a single mounting flange.

[0007]

By the way, in the conventional engine cooling water system, as shown in FIGS.
A cooling water discharge pipe 122 extending in the axial direction of the V-type engine 102 is arranged in the bank space S of the V-type engine 102, and the V-type engine 102 is provided at one side of the bank space S. A cooling water introduction pipe 124 extending vertically is provided.

Inside the cooling water introducing pipe 124, as shown in FIG. 7, the V-type engine 1 is arranged from the radiator (not shown) side.
A cooling water introduction passage 152 for introducing cooling water is formed on the 02 side. Similarly, in the cooling water discharge pipe 122,
Radiator (not shown) from the V-type engine 102 side
A cooling water discharge passage 154 for discharging the cooling water is formed on the side.

Further, as shown in FIG. 7, a mounting space 158 for arranging a thermostat 156 is formed in the cooling water introducing passage 152, and in this mounting space 158, a mounting space 158 is formed.
A thermostat 156 is provided. The mounting space 158 is connected to the cooling water discharge passage 154 side by a bypass passage 160.

Further, in such a V-type engine 102, since the water level in the bank space S is higher than the water level inside the V-type engine 102, the cooling water introducing pipe 12
An air bleeding hole 162 is provided in the upper portion of 4, and an air bleeding bolt 164 is screwed into the air bleeding hole 162. This air vent bolt 16
4, the air inside the cooling water introducing pipe 124 was evacuated.

However, the V-type engine 102 described above is
It is necessary to remove the air bleeding bolt 164 to bleed the air in the cooling water introducing pipe 124 at the time of injecting the cooling water, which is a disadvantage in practice because it takes a lot of trouble to inject the cooling water. There was an inconvenience.

Further, when the air vent hole 162 is provided in the upper portion of the cooling water inlet pipe 124, the air vent bolt 164 screwed into the air vent hole 162 and the leakage of the cooling water are prevented. Parts such as a gasket (not shown) are necessary, which may increase the manufacturing cost of the cooling device, which is an economical disadvantage.

[0013]

In order to eliminate the above-mentioned inconvenience, the present invention mounts a primary side and a secondary side cylinder head on a primary side and a secondary side cylinder bank of a V-shaped cylinder block. The primary side engine bank and the secondary side engine bank, and a cooling water introduction pipe and a cooling water discharge pipe are arranged in the bank space formed between the primary side engine bank and the secondary side engine bank. In an engine cooling device having an introduction cap communicating with a cooling water introduction pipe and a discharge cap communicating with a cooling water discharge pipe on one side of a bank space, the introduction cap and the discharge cap are connected by a connecting portion. It is characterized in that it is integrally formed and that the connecting portion is provided with an air vent passage that connects the inside of the introduction cap and the inside of the discharge cap.

[0014]

According to the invention as described above, when the V-type engine is driven, the cooling water is introduced into the V-type engine by the cooling water introducing pipe and the V-type engine is operated by the cooling water discharging pipe.
The cooling water that has cooled the die engine is discharged from the V engine. Further, when the cooling water is injected, the air in the cooling water introduction pipe is discharged into the cooling water discharge pipe through the air vent passage as the water level of the cooling water in the cooling water introduction pipe becomes higher.

[0015]

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

1 to 3 show a first embodiment of the present invention. 1 and 2, reference numeral 2 is a V-type engine mounted on a vehicle. This V-type engine 2 has primary and secondary cylinder heads 6 and 8 on top of a cylinder block 4, primary and secondary cylinder head covers 10,
12 and the primary side and secondary side engine banks 14 and 16 are configured to be mounted.

A V-shaped bank space S is formed between the primary engine bank 14 and the secondary engine bank 16.

In the bank space S, the primary side, the primary side of the secondary side cylinder heads 6, 8 and the secondary side intake port flange surfaces 18, 20 are arranged in a horizontal direction.

A cooling water discharge pipe 22 extending in the axial direction of the V-type engine 2 is disposed in the bank space S, and the V space is provided at one side of the bank space S.
A cooling water introduction pipe 24 extending in the vertical direction of the die engine 2 is provided.

Further, the cooling water discharge pipe 22 is arranged at a position higher than the cooling water introduction pipe 24.

A cooling water collecting pipe 26 is attached to the other end of the cooling water discharge pipe 22. This cooling water collecting pipe 2
6 is disposed in the other side portion of the bank space S so as to be oriented in the left-right direction of the V-type engine 2.

Further, the cooling water discharge pipe 22 and the cooling water introduction pipe 24 have the same discharge pipe side mounting surface 22a and the same mounting pipe side mounting surface 24a for mounting the discharge cap 28 and the introduction cap 30 described later, respectively. It is formed on the surface. The cooling water discharge pipe 22 and the cooling water introduction pipe 24 constitute a thermo case 32.

Furthermore, the introduction cap 30 and the discharge cap 28 are connected by a connecting portion 34 to be integrally formed, and the connecting cap 34 is provided with the introducing cap 30.
Air vent passage 36 that connects the inside of the exhaust cap 28 with the inside of the exhaust cap 28
Is provided.

More specifically, as shown in FIG. 3, the air bleed passage 34 is integrally formed with the introduction cap 30 and the discharge cap 28, and the introduction cap side mounting surface 30a and the discharge cap side mounting surface 28a are flush with each other. It is provided in the connecting portion 32 formed above.

Next, the operation of this embodiment will be described.

When the V-type engine 2 is driven, cooling water is introduced into the V-type engine 2 from the radiator (not shown) side by the cooling-water introduction pipe 24, and the V-type engine 2 is drawn by the cooling-water discharge pipe 22. The cooling water that has cooled the water is discharged from the V-type engine 2 side to the radiator (not shown) side.

When the cooling water is injected, the air in the cooling water introducing pipe 24 is connected to the air vent passage 36 provided in the connecting portion 34 as the level of the cooling water in the cooling water introducing pipe 24 increases. It is discharged into the cooling water discharge pipe 22 through the.

This makes it possible to omit the air bleeding work that was performed in the conventional cooling device for an engine when pouring cooling water, and the cooling water pouring work can be performed easily, which is advantageous in practice.

Further, the introduction cap 30 and the discharge cap 2
8 and the introduction cap side attachment surface 30a and the discharge cap side attachment surface 28a are formed on the same plane.
By providing the air vent passage 34 in 2, it is possible to omit bolts (not shown), gaskets (not shown), etc. used in the conventional engine cooling water device, and to reduce the number of parts of the engine cooling device. It is possible to reduce the amount of air leakage and to easily form the air vent passage 34, which is economically advantageous.

Further, the introduction cap 30 and the discharge cap 2
8 and 8 are connected and integrally formed by the connecting portion 34, the number of management parts of the engine cooling device can be reduced, the management work of the parts can be easily performed, and it is practically advantageous.

FIG. 4 shows a second embodiment of the present invention.

In the second embodiment, the parts having the same functions as those of the first embodiment will be described with the same reference numerals.

The feature of this second embodiment is that the air vent passage 42 is provided at the attachment surface portion of the connecting portion 44.

That is, the connecting portion 44 for connecting the introducing cap 46 and the discharging cap 48 is formed into a plate shape, and the inner wall surface of the connecting portion 44 is discharged from the introducing cap side mounting surface 46a of the introducing cap 46 and the discharging cap 48. The discharge pipe side attachment surface (not shown) attached to the cap side attachment surface 48a and the introduction pipe side attachment surface (not shown) are arranged close to each other, and the inner wall surface of the connecting portion 44 and the discharge pipe side are arranged. An air bleed passage 42 is formed by the mounting surface (not shown) and the introduction pipe side mounting surface (not shown).

As described above, similarly to the first embodiment, the air bleeding operation at the time of injecting the cooling water, which has been performed in the conventional engine cooling device, can be omitted, and the cooling water can be easily injected. Therefore, it is practically advantageous.

Further, the introduction cap 46 and the discharge cap 4
Connecting part 4 in which the mounting cap side mounting surface 46a and the discharge cap side mounting surface 48a are formed on the same surface.
By providing the air vent passage 42 in the mounting surface portion of No. 4, bolts (not shown), gaskets (not shown), etc. used in the conventional engine cooling water device can be omitted, and the engine cooling device can be omitted. The number of parts can be reduced and the air vent passage 42 can be easily formed, which is economically advantageous, and the maintainability of the air vent passage 42 can be improved, which is practically advantageous.

The present invention is not limited to the first and second embodiments described above, and various application modifications are possible.

For example, in the first embodiment of the present invention, the air vent passage is formed in the connecting portion in which the introduction cap and the discharge cap are integrally formed and the introduction cap side mounting surface and the discharge cap side mounting surface are formed on the same plane. However, it is also possible to use an air vent passage that can connect the introduction cap and the discharge cap, and it is also possible to use the pipe as the air vent passage by connecting the introduction cap and the discharge cap with a pipe. .

[0039]

As described above in detail, according to the present invention, the primary side and the secondary side cylinder heads are mounted on the primary side and the secondary side cylinder banks of the V-shaped cylinder block. A secondary engine bank is configured, a cooling water introduction pipe and a cooling water discharge pipe are arranged in a bank space formed between the primary engine bank and the secondary engine bank, and cooling water is introduced to one side of the bank space. In an engine cooling device in which an introduction cap that communicates with a pipe and a discharge cap that communicates with a cooling water discharge pipe are arranged, the introduction cap and the discharge cap are integrally connected by a connecting portion and the connecting portion is Since the air vent passage that connects the inside of the introduction cap and the inside of the discharge cap is provided, it is possible to omit the air venting operation when pouring the cooling water, which has been done in the past, and to inject the cooling water. Business of readily performed to obtain a practically advantageous. In addition, by providing an air vent passage that connects the inside of the introduction cap and the inside of the discharge cap at the connecting part, the bolts and gaskets used in the conventional products can be omitted, and the number of parts of the engine cooling device can be reduced. In addition, the air vent passage can be easily formed, which is economically advantageous. Further, since the introduction cap and the discharge cap are connected by the connecting portion and integrally formed, the number of management parts of the engine cooling device can be reduced, and the management work of the parts can be easily performed, which is practically advantageous. .

[Brief description of drawings]

FIG. 1 is a front view of a V-type engine showing a first embodiment of the present invention.

FIG. 2 is a schematic plan view of a V-type engine.

FIG. 3 is a schematic cross-sectional view of an integrally formed introduction cap and discharge cap.

FIG. 4 is a schematic sectional view of an integrally formed introduction cap and discharge cap showing a second embodiment of the present invention.

FIG. 5 is a plan view of a V-type engine showing a conventional technique of the present invention.

FIG. 6 is a schematic front view of a V-type engine.

FIG. 7 is a schematic cross-sectional view of a cooling water introduction pipe and a cooling water discharge pipe.

[Explanation of symbols]

 2 V type engine 4 Cylinder block 6 Primary side cylinder head 8 Secondary side cylinder head 10 Primary side cylinder head cover 12 Secondary side cylinder head cover 14 Primary side engine bank 16 Secondary side engine bank 22 Cooling water discharge pipe 24 Cooling water introducing pipe 26 Cooling Water Collecting Pipe 28 Discharge Cap 30 Introduction Cap 32 Thermocase 34 Connecting Portion 36 Air Venting Passage S Bank Space

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[Procedure amendment]

[Submission date] May 27, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

Claims (3)

[Claims] 1. A primary side of a V-shaped cylinder block,
The primary side and secondary side cylinder heads are mounted on the secondary side cylinder bank to form the primary side and secondary side engine banks, and in the bank space formed between the primary side engine bank and the secondary side engine bank. Cooling of an engine in which a cooling water introduction pipe and a cooling water discharge pipe are arranged and an introduction cap communicating with the cooling water introduction pipe and a discharge cap communicating with the cooling water discharge pipe are arranged on one side of the bank space. In the device,
Cooling the engine, characterized in that the introduction cap and the discharge cap are integrally formed by connecting them by a connecting portion, and the connecting portion is provided with an air vent passage that connects the inside of the introducing cap and the inside of the exhaust cap. apparatus. 2. The air vent passage according to claim 1, wherein the air vent passage is an air vent passage provided in a connecting portion formed integrally with the introduction cap and the discharge cap so as to have the same mounting surface. Engine cooling system. 3. The air bleed passage is an air bleed passage provided at a mounting surface portion of a connecting portion formed integrally with the introduction cap and the discharge cap so as to have the same mounting surface. The engine cooling device according to 1.