JPH09273426A - Connecting part structure of fluid route for automobile engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety of a connecting part, which includes a hose and a metal pipe, by passing the fluid of a high-pressure side to the safe direction when a connecting part is disconnected. SOLUTION: For example, a water passage changing part 4 is provided in an over-low connector 3 of a radiator 1. This water passage changing part 4 is formed by inclining an inner passage 3a of the over-flow connector 3 downward. This inclination is formed by a projecting part 5, which is formed by projecting an upper wall part 6 of the hover-flow connector 3 downward, and an inclined surface 6, which is formed by inclining a lower wall part 3c thereof downward. Consequently, in the case where a reserve hose is disconnected from the over-flow connector 3 by the fitting failure and deterioration of the reserve hose, the over-flowed cooling water is discharged downward like an arrow B. Namely, since the over-flowed cooling water is securely discharged to a ground side different from the projecting direction of the over-flow connector 3, a danger that the over-flowed cooling water is spread on a person is reduced, and the safety can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a connecting portion in a fluid path of an automobile engine, and more particularly, to relieve when cooling water for cooling the automobile engine becomes high pressure due to temperature rise in a cooling system. A connection structure in a fluid path of an automobile engine, which is suitable for being applied to an overflow structure of an automobile engine cooling device configured to cause an overflow from a cooling system via a hose and a connector connecting the hose Is.

[0002]

2. Description of the Related Art Conventionally, a radiator, which is a component of a cooling system for an automobile engine, is shown in FIG.

That is, in FIG. 6, the radiator 11 is arranged in the front of the engine room 12 immediately after the grill 13. And this radiator 11 is the engine 1
The radiator 1 circulates the cooling water that circulates inside 4 and becomes hot.
The heat is dissipated to the atmosphere by passing the inside.

When the vehicle is running, the radiator 1
1 Since the traveling wind hits the front surface, sufficient cooling air can be obtained, but the cooling air is insufficient when the vehicle speed is slow or when the vehicle is idling. Even in such a state, the cooling fan 1 is provided at the rear of the radiator 11 so that sufficient cooling air can be obtained.
5 are provided. That is, the cooling fan 15 draws in air.

In the radiator 11, when the cooling water for cooling the engine 14 becomes high in pressure due to the temperature rise, the cooling water overflows for relief. In this case, the overflowed cooling water is stored in the reserve tank 17 via the reserve hose 16.
Is accumulated in In FIG. 6, reference numeral 18 indicates a radiator cap.

Next, the overflow system in the radiator 11 will be described with reference to FIG.

That is, the upper portion of the radiator 11 containing the radiator core 21 is composed of a tank seat plate 22 and an upper tank 23, and the radiator cap 18 is mounted on the upper tank 23.

An overflow connector 24 is formed integrally with the upper tank 23, and a reserve hose 16 is connected to the overflow connector 24 and communicates with a reserve tank 17.

The cooling system is hermetically sealed, and when the internal pressure of the radiator 11 in the cooling system exceeds a specified pressure, the positive pressure valve 26 moves upward against the biasing force of the positive pressure spring 25. . As a result, the cooling water in the radiator 11 overflows and flows from the overflow connector 24 through the reserve hose 16 to the reserve tank 1.
It flows to 7.

[0010]

However, in such a conventional one, the overflow connector 24 is used.
The internal passage that serves as a water channel is a horizontal direction along the extending direction of the overflow connector 24. Therefore, the reserve hose 1 may be damaged due to a mounting failure or deterioration.
When 6 is disengaged from the overflow connector 24 (from the position of the chain double-dashed line in FIG. 7 to a solid line), the overflowed cooling water is discharged almost horizontally as shown by arrow A.

If such a phenomenon occurs when the engine room is opened, there is a possibility that overflowed cooling water may fall on a person.

In addition, the reserve hose 16 may be disconnected from the overflow connector 24 for maintenance or the like.
In such a case, the engine is often in a key-off state with the engine stopped. In the key-off state where the engine is stopped, the cooling fan 15 is stopped, so that the temperature inside the radiator 11 temporarily rises to a high pressure and the overflow amount tends to increase. If the reserve hose 16 is removed from the overflow connector 24 at such a time, there is a possibility that the cooling water may splash on a person, and there is room for improvement in terms of further improvement in safety.

Further, the above-mentioned fear is not limited to the structure of the overflow portion of the cooling system, but can also be said to the general structure of the connection portion in the fluid path of the automobile engine fluid such as fuel and oil.

[0014]

In order to achieve the above object, the invention according to claim 1 is a high pressure when the connecting portion is disconnected in a connecting portion structure in a fluid path required for driving an automobile engine. It is characterized in that the fluid on the side flows out in the safe direction.

The invention according to claim 2 is characterized in that the connecting portion comprises a hose and a connector portion for connecting the hose.

The invention according to claim 3 is characterized in that it is adapted to flow out through a water channel changing portion which is formed at the tip of the connector portion and is guided in a direction different from the projecting direction of the connector portion. To do.

According to a fourth aspect of the present invention, the water channel changing portion is formed by the inclination of the internal passage of the connector portion.

According to a fifth aspect of the present invention, the inclination is formed by a convex portion of the wall portion on one side of the connector portion toward the other side and an inclined surface of the wall portion on the other side in a direction avoiding the convex portion. It is characterized by being.

According to a sixth aspect of the present invention, the inclination is in a direction in which the one side wall portion of the connector portion is bent to the other side and the other side wall portion shorter than the one side wall portion is prevented from being bent. And an inclined surface.

According to a seventh aspect of the present invention, the fluid is cooling water for cooling the engine, and when the pressure becomes high in the cooling system, the fluid is made to overflow through the connecting portion for relief. Characterize.

[0021]

According to the first aspect of the invention, since the fluid on the high-pressure side flows out in the safety direction when the connecting portion is disconnected, not only the hose but also the connecting portion between the metal pipes is included. The safety can be improved.

According to the second aspect of the present invention, it is possible to improve the safety even in the connection portion between the hose and the connector portion, which is relatively likely to be disconnected.

According to the third aspect of the present invention, since the water passage changing portion is provided in the connector portion, it is possible to improve safety by discharging in a direction different from the projecting direction of the connector portion.

According to the fourth aspect of the invention, since the water passage changing portion provided in the connector portion is the inclination of the internal passage, the water is discharged in a direction different from the connecting direction of the hose, and safety can be improved.

According to the fifth aspect of the present invention, the inclination has a convex portion on one side of the wall portion of the connector portion toward the other side and an inclined surface in a direction avoiding the convex portion of the wall portion on the other side. Since it is formed by, the safety can be improved by an inexpensive means.

According to the sixth aspect of the invention, the direction in which the inclination is such that the one side wall of the connector portion bends to the other side and the other side wall part shorter than the one side wall avoids the bend. Since it is formed by a slanted surface to, a more reliable directivity can be obtained.

According to the invention described in claim 7, it is possible to improve the safety in the connecting portion for overflow in the cooling system.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

The same components as those in the prior art will be described with the same reference numerals.

1 and 2 show Embodiment 1 of the present invention.

The upper portion of the radiator 1 containing the radiator core 21 is a tank portion for storing cooling water, and this tank portion is composed of a tank seat plate 22 and an upper tank 2. The upper tank 2 is fitted with a radiator cap 18 that can be removed when supplying cooling water.

An overflow connector 3 as a connector portion is integrally formed on the upper tank 2 so as to project.
A reserve hose 16 as a hose is connected to the overflow connector 3 and communicates with a reserve tank 17. That is, the overflow connector 3 and the reserve hose 16 constitute a connecting portion. Incidentally, the protruding direction of the overflow connector 3 is often limited due to reasons such as the molding of the upper tank 2 and the hose wiring.

When the internal pressure of the radiator 1 in the cooling system exceeds the specified pressure, the positive pressure valve 26 moves upward against the urging force of the positive pressure spring 25 and is opened.
As a result, the cooling water in the radiator 1 overflows and flows out from the overflow connector 3 to the reserve tank 17 via the reserve hose 16.

When the internal pressure of the radiator 1 falls below a specified pressure, such as when the engine heat is small, the positive pressure valve 26 closes, but conversely, the negative pressure valve 27 causes the negative pressure spring 28.
It moves downward against the urging force of and becomes an open state. In this case, the cooling water in the reservoir tank 17 returns to the radiator 1 via the reservoir hose 16.

In FIG. 1, reference numeral 29 indicates an atmospheric seal provided between the radiator cap 18 and the upper tank 2 in order to maintain the airtightness of the cooling system. Reference numeral 30 is a reserve hose clamp on one side,
Reference numeral 31 is a reserve hose clamp on the other side, reference numeral 32 is a reserve tank cap, and reference numeral 33 is a reserve tank overflow portion.

In the first embodiment, the overflow connector 3 of the radiator 1 is provided with the water channel changing unit 4. The water channel changing portion 4 is formed by the downward inclination of the internal passage 3a of the overflow connector 3.

This inclination is formed by the downward convex portion 5 of the upper wall portion 3b of the overflow connector 3 and the downward inclined surface 6 of the lower wall portion 3c.

Therefore, when the reserve hose 16 is disengaged from the overflow connector 3 (becomes like the solid line from the position indicated by the chain double-dashed line in FIG. 1) due to improper mounting or deterioration of the reserve hose 16, the overflowed cooling water is , As shown by the arrow B, the ink is discharged downward.

That is, the overflowed cooling water is surely discharged to the ground side, which is different from the protruding direction of the overflow connector 3, so that it is less likely to get on a person and the safety can be improved.

FIG. 3 shows the second embodiment of the present invention.

Also in this second embodiment, the overflow connector 3'of the radiator 1'is provided with the water channel changing portion 7, and the water channel changing portion 7 is inclined downward from the internal passage 3a 'of the overflow connector 3'. Is formed by.

This inclination is shorter than that of the upper wall portion 3b 'of the overflow connector 3'bending downward (for the dimension M in FIG. 3) and the upper wall portion 3b' (for the dimension L in FIG. 3). ) It is formed by the downwardly inclined surface 9 of the lower wall portion 3c '.

Since this portion can be formed by rotating the mold C shown in FIG. 4 in the direction of the arrow, it can be formed relatively easily, and the internal passage 3a 'can be formed by a slide pin or the like.

Therefore, also in the second embodiment, when the reserve hose 16 is disengaged from the overflow connector 3'due to a mounting failure or deterioration of the reserve hose 16, the overflowed cooling water is indicated by an arrow B '. Will be discharged downward.

That is, since the overflowed cooling water is surely discharged to the ground side, it is less likely that the cooling water will hit people and the safety can be improved.

The inclination is not limited to the downward direction, but may be laterally depending on the case.

In addition to the above-mentioned means for changing the water channel, as shown in FIG. 5, it is also possible to use a means such as outflow through a large number of circular holes 10 or the like.

In addition to the cooling water overflow portion, the present invention can be widely applied to fluid, oil, and other fluid connecting portions, and the connecting portion is not limited to the connector portion and the hose. The present invention can also be applied to the location of the configuration according to.

[Brief description of drawings]

FIG. 1 is an overall sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 4 is an explanatory diagram on molding of the second embodiment shown in FIG. 3;

FIG. 5 is an explanatory diagram showing a main part of still another embodiment of the present invention.

FIG. 6 is a schematic plan view around a radiator.

FIG. 7 is an overall cross-sectional view of an overflow system unit in a radiator of a conventional technique.

[Explanation of symbols]

 1, 1'Radiator 2 Upper tank 3, 3'Overflow connector (connector part) 3a, 3a 'Internal water passage 3b, 3b' Upper wall portion 3c, 3c 'Lower wall portion 4, 7 Water passage changing portion 5 Convex portion 6 Sloping surface 8 Bend 9 Inclined surface 16 Reserve hose (hose)

Claims (7)

[Claims] 1. A connecting portion structure in a fluid path required for driving an automobile engine, wherein a fluid on the high pressure side flows out in a safe direction when the connecting portion is disconnected. Connection structure in the fluid path of an automobile engine. 2. The connecting portion structure in a fluid path of an automobile engine according to claim 1, wherein the connecting portion comprises a hose and a connector portion connecting the hose. 3. The connector according to claim 2, wherein the connector portion is configured to flow out through a water channel changing portion which is formed at a tip end of the connector portion and which guides the connector portion in a direction different from a projecting direction. Connection structure in the fluid path of an automobile engine. 4. The connecting structure in a fluid path of an automobile engine according to claim 3, wherein the water passage changing portion is formed by an inclination of an internal passage of the connector portion. 5. The inclination is formed by a convex portion of the wall portion on one side of the connector portion toward the other side and an inclined surface of the wall portion on the other side in a direction avoiding the convex portion. The connection part structure in the fluid path of the automobile engine according to claim 4. 6. The inclination is formed by a bending of the wall portion on one side of the connector portion to the other side and an inclined surface of the wall portion on the other side, which is shorter than the wall portion on the one side, in a direction to avoid the bending. The connecting portion structure in the fluid path of the automobile engine according to claim 4, wherein 7. The fluid is cooling water for cooling an engine, and when the pressure in the cooling system becomes high, the fluid overflows through the connecting portion for relief. The connection part structure in the fluid path of the vehicle engine according to any one of claims 1 to 6.