JPH0650148A - Cooling system of v type engine - Google Patents

Abstract

PURPOSE:To eliminate protrusion of a connection pipe by way of directing it to the side of an engine, to miniaturize a V type engine and to prevent interference of parts by arranging the connection pipe of water outlet cap on the side of the engine rather than the outside surface of the cap. CONSTITUTION:On a V type engine 2, primary and secondary side both engine banks 4, 6 are arranged in a V shape. Additionally, slippage of the both side engine banks 4, 6 is formed by a step difference 28, while an allowable space S is formed by gaps 30, 32 between the both sides. Furthermore, in the gaps 30, 32 between the both sides, a water outlet cap 34 to introduce each cooling water of the both side engine banks 4, 6 is installed. Additionally, to the water outlet cap 34, a water hose 46 is connected through a connection pipe 44. In this case, the connection pipe 44 is directed to the side of the V type engine 2, that is, arranged in the allowable space S inside rather than the outside surface A of the water outlet cap 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a V-type engine, and more particularly to a cooling device for a V-type engine which is capable of downsizing the entire V-type engine and ensuring a sufficient clearance with an interfering component.

[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 FIG. 5, in the intake system of the V-type engine 102, a V-shaped primary side above a cylinder block (not shown), a primary side to a secondary side cylinder bank (not shown), Primary side and secondary side engine bank 10 configured by mounting a secondary side cylinder head (not shown)
4, 106 are provided.

At the rear of the vehicle on one side of the V-shaped engine 102 in the crankshaft axis direction X, a water outlet for guiding the cooling water of each water jacket (not shown) of the primary and secondary engine banks 104 and 106. Cap 10
8 are attached by the primary and secondary cap flanges 110 and 112.

This water outlet cap 108
A connection pipe 114 that projects upward or outward is continuously provided in the. One end of a water hose 116 that guides the cooling water to the radiator side is attached to the connection pipe 114.

A cooling device for such a V-type engine is disclosed, for example, in Japanese Patent Laid-Open No. 2-238163 and Japanese Utility Model Laid-Open No. 63-96227. The one described in JP-A-2-238163 uses the space surrounded by the intake distribution pipe as a space for disposing the introduction pipe, and prevents the introduction pipe from largely protruding outside the surge tank or the intake distribution pipe. However, the outlet around the intake system of the engine is compact and has a good tightness. In Japanese Utility Model Laid-Open No. 63-96227, a joint is connected to the cooling water outlet of one cylinder block, and a pipe of the cooling water outlet of the other cylinder block is connected to the joint to join them. A radiator hose is connected to the joint, an inlet pipe is integrally provided on one side of the joint to connect the radiator hose, and a pipe leading to a water pump is connected to the other end.

[0007]

However, conventionally, when the connecting pipe of the water outlet cap is projected upward, the overall height of the engine becomes large, and when the connecting pipe is projected outward, the overall width of the engine becomes large and the water hose and the master. The gap with the bag (interference component) becomes small, which causes an increase in the size of the engine and also causes the inconvenience that the water hose and the interference component interfere with each other.

[0008]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention is provided with a water outlet cap for guiding each cooling water of the V-shaped primary side and secondary side engine banks. In a cooling device for a V-type engine provided with a connection pipe for connecting a water hose to an outlet cap, the connection pipe is provided on the water outlet cap so as to be located closer to the engine than an outer surface of the water outlet cap. And

[0009]

According to the structure of the present invention, since the connecting pipe of the water outlet cap is located closer to the engine side than the outer surface of the water outlet cap, the connecting pipe does not project upward or outward, and V It is possible to reduce the size of the die engine and also to secure a gap between the water hose and the interference part to prevent the interference part from interfering with the water hose.

[0010]

Embodiments of the present invention will be described in detail and specifically with reference to the drawings. 1 to 4 show an embodiment of the present invention. In FIG. 1, 2 is a V-type engine mounted on a vehicle. This V-type engine 2 has a V-shaped primary side above a cylinder block (not shown),
It has primary side and secondary side engine banks 4 and 6 configured by mounting a primary side and a secondary side cylinder head (not shown) on a secondary side cylinder bank (not shown).

In the upper part of the V-type engine 2, as a component of an intake system, to guide intake air to the primary side and secondary side cylinders (not shown) of the primary side and secondary side engine banks 4 and 6. , Primary side and secondary side distribution pipes 8 and 10 are provided.

Further, on the downstream side of the primary side distribution pipe 8,
A primary surge tank 12 is arranged in series above the secondary engine bank 6. The primary-side surge tank 12 is connected to the primary-side intake introduction pipes 14, 16 and 18 that guide intake air to the primary-side cylinders. On the downstream side of the secondary side distribution pipe 10, a secondary side surge tank 20 is arranged in series above the primary side engine bank 4. The secondary side surge tank 20 is connected with secondary side intake introducing pipes 22, 24 and 26 for guiding intake air to each secondary side cylinder.

Crankshaft center direction X of the V-type engine 2
At the rear end on the one side of the vehicle, a bank shift peculiar to the V-type engine 2 is formed by the step 28. As a result, on the rear side of the V-type engine 2, the primary side rear surface 30
And a secondary side rear surface 32 located on the vehicle front side of the primary side rear surface 30. As a result, a margin space S is formed on the rear end side of the V-type engine 2.

A water outlet cap 34 is attached to the primary side rear surface 30 and the secondary side rear surface 32. The water outlet cap 34 has a primary side cap flange 36 attached to the primary side rear surface 30.
And a secondary side cap flange 38 attached to the secondary side rear surface 32.

As shown in FIG. 4, the primary-side cap flange 36 has a primary-side flow port 40, and the secondary-side cap flange 38 has a secondary-side flow port 42. The primary side distribution port 40 and the secondary side distribution port 42
And are communicated with a water flow passage (not shown) formed in the water outlet cap 34.

Further, in the water outlet cap 34, a connection pipe 44 communicating with the water flow passage is directed to the V-type engine 2 side, that is, inside the outer surface A of the water outlet cap 34, in a spare space S. It is located and provided.

One end of a water hose 46 is connected to the connecting pipe 44.

That is, in the cooling device of this embodiment,
As shown in FIG. 2, the cooling water pumped from the water pump 50 is guided to each water jacket of the cylinder block / cylinder head 52 of the V-type engine 2, and
Water outlet cap 34 to connecting pipe 44
Through to the thermo case 54, and the radiator 5
6 will be sent. In FIG. 1, reference numeral 58 is a master bag (interference component), 60 is an air regulator, and 62 is a connecting pipe.

Next, the operation of this embodiment will be described.

The cooling water pumped from the water pump 50 flows through the water jackets of the V-type engine 2 to the water outlet cap 34, and is then fed to the radiator 56 from the thermo case 54 side.

By the way, in this embodiment, the connection pipe 44 provided in the water outlet cap 34 is arranged inside the outer side surface A of the water outlet cap 34, and is formed by the bank shift peculiar to the V-type engine 2. Since the connection pipe 44 does not project upward or outward because it is provided in the extra space S, the overall height of the engine and the overall width of the engine are reduced to reduce the V-type engine 2
The overall size can be reduced.

Further, as shown in FIG. 1, a large clearance can be provided between the master bag (interference part) 58 and the water hose 46 to prevent the water hose 46 and the master bank 58 from interfering with each other. You can

Further, since the connecting pipe 44 can be brought close to the V-type engine 2 side, the length of the water hose 46 can be reduced.

Furthermore, as compared with the case where the connection pipe 44 is installed on the primary engine bank 4 side, the bent state of the water outlet cap 34 and the water hose 46 can be made in a reasonable shape.

Further, the water outlet cap 34
A space for arranging components such as the air regulator 60 can be formed in the upper part of the V, and the V-type engine 2 can be more effectively downsized.

[0026]

As is apparent from the above detailed description, according to the present invention, in the V-type engine, the connecting pipe of the water outlet cap is provided closer to the engine side than the outer side surface of the water outlet cap. Since the connection pipe of the water outlet cap is directed to the engine side, the connection pipe does not project upward or outward, so that the V-type engine can be downsized, and the water hose and the interference component A sufficient clearance can be secured to prevent the interference component and the water hose from interfering with each other.

[Brief description of drawings]

FIG. 1 is a plan view of a V-type engine.

FIG. 2 is a flow chart of cooling water in this embodiment.

FIG. 3 is a plan view of a water outlet cap.

4 is a cross-sectional view of the water outlet cap taken along the line 〓-〓 of FIG.

FIG. 5 is a plan view of a conventional V-type engine.

[Explanation of symbols]

 2 V type engine 4 Primary side engine bank 6 Secondary side engine bank 34 Water outlet cap 44 Connection pipe S Extra space

Claims (1)

[Claims] 1. A cooling device for a V-type engine, comprising a water outlet cap for guiding cooling water of a V-shaped primary side and secondary side engine bank, and a connection pipe for connecting a water hose to the water outlet cap. 2. The cooling device for a V-type engine according to claim 1, wherein the connection pipe is provided on the water outlet cap so as to be located closer to the engine than an outer surface of the water outlet cap.