JPH10280958A - Reserve tank communication route of radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reverse flow of a cooling water surely at the removing time of a radiator cap by providing a check valve for flowing a fluid from a radiator to a reserve tank in a reserve tank communication route and providing a means for cancelling the check function of the check valve at the cap mounting time on the radiator cap. SOLUTION: Under such state that a radiator cap 4 is removed, a check valve 10 is push-pressed by the water pressure from a reserve tank side and the slant surface of the check valve 10 is contacted to the small diameter of an overflow pipe 8. Thereby, the check function of the check valve 10 is displayed and the reverse flow of the cooling water from the reserve tank to the radiator is prevented. Next, when the radiator cap 4 is installed to the water pouring port 14 of the radiator 2, the taper wall part 18 of a check function cancel means 12 push-presses this umbrella part while contacting to the umbrella part of the check valve 10 and the check function of the check valve 10 is cancelled. In this state, the cooling water from the radiator 2 flows from the overflow pipe 8 to the reserve tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication path of a radiator with a reserve tank. In particular, when water is injected into the radiator, the check valve prevents the backflow of cooling water from the reserve tank to the radiator even if the radiator cap is removed. Of the radiator, which can increase the degree of freedom of the mounting position of the reserve tank, and when the radiator cap is attached, the check function of the check valve can be canceled by the check function canceling means so that both flows can be performed. The present invention relates to a reserve tank communication passage.

[0002]

2. Description of the Related Art A radiator is mounted on a vehicle, and a reserve tank is installed near the radiator. Since the cooling water expands when the temperature of the radiator is high, the reserve tank absorbs the overflow of the cooling water from the radiator, and conversely, the cooling water contracts when the temperature of the radiator is low. It has the function of replenishing to

[0003] As a reserve tank communication path of the radiator, there is one disclosed in Japanese Patent Application Laid-Open No. 5-90179. The engine cooling system air release device disclosed in this publication connects an air release tube between a radiator tank and a pressurized reserve tank, and connects the reserve tube between the reserve tank and the engine. In the bleeding device, a sub-tank for air / water separation communicating with the radiator tank is arranged above the radiator tank, and an air release tube connected from the reserve tank to the radiator tank is connected to the radiator tank via the sub-tank for water / water separation. The air / water separation sub-tank is connected to the engine with an air release tube to ensure air release and prevent thermal shock due to temperature changes in the radiator tube.

Further, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 6-108844. A radiator tank cap disclosed in this publication includes a cap body that removably covers an opening of a water supply filler neck protruding from an upper end of the radiator tank, the cap body closing the opening in a liquid-tight manner, and a body. A cylindrical portion provided with a communication portion communicating with an overflow pipe protruded from the filler neck and provided on the outer periphery thereof; A gas permeable membrane that closes a lower end opening of the shape portion, wherein the membrane has no water permeability when the internal pressure of the tank is at least a certain value or less, and reduces the number of parts and movable parts of the cap.

[0005] Further, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 8-74576. The cooling device disclosed in this publication,
A water-cooled cooling device configured to cool the engine body by circulating cooling water through a water passage between the engine body and the radiator, and is disposed above the radiator and communicates with the radiator. A tank having a water inlet for water injection, and a pipe communicating between the uppermost portion of the water passage in the engine body and the tank,
In a cooling device provided with a hanging portion arranged at a position lower than the uppermost position of the allowable water level in the water passage and the tank in the pipe in the pipe, the water passage in the engine body is provided in the middle of the pipe, Selective communication means for selectively communicating between the tank and the atmosphere is provided to shorten the water injection time when replacing the cooling water, and to perform both the water injection and the air bleeding from the radiator side.

[0006]

As shown in FIGS. 11 and 12, in a conventional radiator reserve tank communication passage, a radiator 102 is disposed at a front portion of an engine room 114 at a front portion of a vehicle 142. As shown in FIG. At the same time, a reserve tank 146 is provided near and behind the radiator 102.

[0007] At this time, the full level water level of the reserve tank 146 is located below the radiator cap 104 of the radiator 102, that is, at a small height position, and there is no problem when the reservoir tank 146 is filled with water.

In recent years, the number of parts such as an ABS (anti-skid brake) unit installed in an engine room of a vehicle has been increasing. It is often moved to a position that is easy to perform, for example, a position away from the radiator.

That is, as shown in FIG. 13 and FIG. 14, the reserve tank 24
6 may be installed at a position higher than the radiator cap 204 of the radiator 202, and the full level water level of the reserve tank 246 may be higher than the height position of the radiator cap 204.

Then, as shown in FIG. 15, the radiator 1
When the water inlets 114 and 214 of the 02 and 202 are closed by the radiator caps 104 and 204, there is no problem.

At this time, when the full level water level of the reserve tank is located below the radiator cap of the radiator, that is, at a small height position, when the water level in the reserve tank becomes higher than the radiator cap. Even if the radiator cap and the reserve tank cap are opened for initial water injection at a factory or the like, the cooling water in the radiator 102 returns to the reserve tank 146 via the overflow pipe 108 as shown in FIG. Does not occur.

However, when the full level water level of the reserve tank is higher than the height position of the radiator cap, when the water level in the reserve tank becomes higher than the radiator cap, When the reservoir tank cap is opened, as shown in FIG. 17, the cooling water flows backward from the reserve tank into the radiator 202 through the overflow pipe 208 due to the head difference, and the cooling water overflows from the water inlet 214 of the radiator 202. Which is disadvantageous in practical use.

[0013]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, the present invention provides a radiator for a vehicle, and a radiator having a full-level water level higher than a height position of a radiator cap of the radiator. The reserve tank is disposed so as to be at the right position, and in the reserve tank communication path of the radiator that connects the reserve tank and the radiator, the reverse tank allows only the flow from the radiator to the reserve tank in the reserve tank communication path. A stop valve is provided, and the radiator cap is provided with a check function canceling means for canceling the check function of the check valve when the radiator cap is attached and enabling both flows.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION
At the time of water injection to the radiator, even if the radiator cap is removed, the backflow of the cooling water from the reserve tank to the radiator is prevented by the check valve, the degree of freedom of the mounting position of the reserve tank is increased, and when the radiator cap is attached, The check function canceling means cancels the check function of the check valve to allow both flows.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 5 show a first embodiment of the present invention. 1 and 2, reference numeral 2 denotes a radiator mounted on a vehicle (not shown), and reference numeral 4 denotes a radiator cap.

Radiator cap 4 of the radiator 2
A reserve tank (not shown) is provided so that the full level water level is higher than the height position of the radiator 2, and a reserve tank communication path 6 for connecting the reserve tank to the radiator 2 is provided.

The reserve tank communication passage 6 has an overflow pipe 8 formed in the radiator 2 and a communication pipe (not shown) for connecting the overflow pipe 8 to the reserve tank.

A check valve 10 is provided in the reserve tank communication passage 6 to allow only a flow from the radiator 2 to the reserve tank, and the radiator cap 4
When the radiator cap 4 is mounted, the check valve 1
A configuration is provided with a non-return function canceling unit 12 that cancels the zero non-return function and enables both flows.

More specifically, as shown in FIGS. 1 to 4, the check valve 10 is disposed at an end of the overflow pipe 8 formed below the water inlet 14 of the radiator 2 on the radiator 2 side. Is done.

At this time, a small-diameter portion 16 is formed at the end of the overflow pipe 8 on the radiator 2 side, and the small-diameter portion 16 has a central small-diameter, which will be described later, of the check valve 10 having a smaller diameter than the small-diameter portion 16. Position the part 10-4.

That is, the check valve 10 is a jiggle valve, and as shown in FIG. 5, an umbrella portion 10-1 which is a protruding end located on the radiator 2 side, and a circumference or the like provided on the umbrella portion 10-1. A plurality of, for example, four slits 10 are formed at intervals.
-2, a large diameter portion 10-3 located in the oil flow pipe 8, and a central small diameter portion 10-4 connecting the umbrella portion 10-1 and the large diameter portion 10-3.

The cut amount of the slit 10-2 formed in the umbrella portion 10-1 is set from the outer peripheral portion of the umbrella portion 10-1 to the central small diameter portion 10-4, and the large diameter portion 10- is formed. An inclined surface portion 10-5 is formed at a position where the small diameter portion 3 and the central small diameter portion 10-4 communicate with each other.
To function as a seal site.

A sealing member (not shown) may be bonded to the inclined surface portion 10-5 to improve the sealing function.

The check function canceling means 12
Consists of a tapered wall portion 18 provided at the lower end of the radiator cap 4. When the radiator cap 4 is mounted, the tapered wall portion 1 is attached to the umbrella portion 10-1 which is the protruding end of the check valve 10.
8 and presses the umbrella portion 10-1 to make the check valve 1
It is configured to cancel the zero check function.

That is, as shown in FIGS. 1 and 2, a tapered wall portion 18 is formed at the lower end of the radiator cap 4 by a bottomed cylindrical member.

Next, the operation will be described.

When the radiator cap 4 is removed, as shown in FIGS. 1 and 3, the check valve 10 is pressed by the water pressure from the reserve tank side, and the small diameter portion 16 of the overflow pipe 8 on the radiator 2 side. To the inclined surface 10-5 of the check valve 10.

When the inclined surface portion 10-5 of the check valve 10 comes into contact with the small diameter portion 16, the check function of the check valve 10 is exhibited, and the backflow of the cooling water from the reserve tank to the radiator 2 is prevented. .

When the radiator cap 4 is attached to the water inlet 14 of the radiator 2, FIGS.
As shown in the figure, the tapered wall portion 18 of the check function canceling means 12 presses the umbrella portion 10-1 while contacting the umbrella portion 10-1 of the check valve 10, and the check function of the check valve 10 is reduced. Cancel.

As shown in FIG. 4, the cooling water from the radiator 2 is supplied to the small diameter portion 1 of the overflow pipe 8 through the slit 10-2 formed in the umbrella portion 10-1 of the check valve 10.
6, and flows through the overflow pipe 8 to the reserve tank.

Thus, even when the radiator cap 4 is removed when the radiator 2 is filled with water, the check valve 10 can reliably prevent the backflow of the cooling water from the reserve tank to the radiator 2.

Also, by providing the check valve 10 in the reserve tank communication passage 6, the degree of freedom of the mounting position of the reserve tank can be increased, which is practically advantageous.

Further, when the radiator cap 4 is mounted on the radiator 2, the check function of the check valve 10 can be canceled by the check function canceling means 12, and both flows can be performed. There is no malfunction during use.

Furthermore, when the radiator cap 4 is mounted on the radiator 2, the check function canceling means 1
By pressing the umbrella portion 10-1 while the second tapered wall portion 18 is in contact with the umbrella portion 10-1 of the check valve 10, the check function of the check valve 10 can be canceled and the reserve tank can be canceled. To the radiator 2 and from the radiator 2 to the reserve tank, and there is no problem during normal use.

FIGS. 6 to 9 show a second embodiment of the present invention. In the second embodiment, portions that perform the same functions as those in the first embodiment will be described with the same reference numerals.

The feature of the second embodiment is that the check function canceling means 12 is provided with an arc-shaped cross-section provided at the outer periphery of the lower end of the radiator cap 4 and at equal circumferential intervals with different amounts of protrusion to the outer periphery. Is constituted by the wall portion 22.

That is, as shown in FIGS. 6 to 9, for example, two wall portions 22-1 having an arc-shaped cross section are provided on the outer periphery of the lower end of the radiator cap 4 and at equal circumferential intervals by varying the amount of protrusion to the outer periphery. 22-2 is provided.

When the radiator cap 4 is mounted, the radiator cap 4 is rotated, so that one of the wall portions 22-1 is attached to the umbrella portion 10-1 which is the protruding end of the check valve 10. Umbrella part 1 while contacting 22-2
By pressing 0-1, the check function of the check valve 10 is canceled when the radiator cap 4 is mounted.

Also, when the radiator cap 4 is removed, the check valve 1 is operated by water pressure from the reserve tank side.
0 is pressed, the check function of the check valve 10 is exerted, and the backflow of the cooling water from the reserve tank to the radiator 2 is prevented.

Then, even when the radiator cap 4 is removed when the radiator 2 is filled with water, the radiator 2 can be removed from the reserve tank in the same manner as in the first embodiment.
The check valve 10 can reliably prevent the backflow of the cooling water into the cooling water.

Also, by providing the check valve 10 in the reserve tank communication passage 6, the degree of freedom of the mounting position of the reserve tank can be increased as in the case of the first embodiment. It is advantageous.

Further, when the radiator cap 4 is mounted on the radiator 2, the check function of the check valve 10 can be canceled by the check function canceling means 12, which is different from that of the first embodiment. Similarly, both flows are possible, and there is no problem during normal use.

Further, when the radiator cap 4 is rotated, the check function of the check valve 10 can be canceled by the walls 22-1 and 22-2 having an arc-shaped cross section, and the radiator 2 can be removed from the reserve tank. Flow from the radiator 2 to the reserve tank, and there is no problem during normal use.

The present invention is not limited to the above-described first and second embodiments, and various modifications can be made.

For example, in the first and second embodiments of the present invention, when the check valve 10 has the check function, the water pressure from the reserve tank side is used. As described above, the check valve 10 is provided in the overflow pipe 8.
Is provided in the radiator 2 side, that is, in the direction to close the check valve 10, and the check function of the check valve 10 is exerted by using the urging force of the spring 32, thereby sealing the check valve 10. It is also possible to adopt a configuration for improving the performance.

[0047]

As described above in detail, according to the present invention, the radiator is provided on the vehicle, and the radiator is reserved so that the full level water level is higher than the height position of the radiator cap of the radiator. A check valve is provided in the reserve tank communication passage of the radiator for arranging the tank and connecting the reserve tank and the radiator, and a check valve for allowing only the flow from the radiator to the reserve tank is provided in the reserve tank communication passage, and the radiator cap is provided in the radiator cap. Since the check function canceling means for canceling the check function of the check valve at the time of mounting the cap and enabling both flows is provided, even when the radiator cap is removed at the time of water injection to the radiator, from the reserve tank to the radiator. The check valve can reliably prevent the backflow of the cooling water. Further, by providing a check valve in the reserve tank communication passage, the degree of freedom of the mounting position of the reserve tank can be increased, which is practically advantageous. Furthermore, when the radiator cap is attached to the radiator, the check function of the check valve can be canceled by the check function canceling means, and both flows can be performed, and there is no problem during normal use. It is.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a radiator according to a first embodiment of the present invention with a radiator cap removed.

FIG. 2 is a schematic sectional view of the radiator when a radiator cap is mounted.

FIG. 3 is a schematic enlarged sectional view of a check valve with a radiator cap removed.

FIG. 4 is a schematic enlarged sectional view of a check valve when a radiator cap is mounted.

FIG. 5 is a perspective view of a check valve.

FIG. 6 is a schematic plan view of a radiator cap according to a second embodiment of the present invention with the radiator cap removed.

FIG. 7 is a schematic sectional view of the radiator with a radiator cap removed.

FIG. 8 is a schematic plan view of the radiator cap when the radiator cap is attached.

FIG. 9 is a schematic sectional view of the radiator when a radiator cap is attached.

FIG. 10 is a schematic enlarged sectional view of a radiator and a check valve in a state where a radiator cap is removed according to another embodiment of the present invention.

FIG. 11 is a schematic plan view of a vehicle showing a first prior art of the present invention.

FIG. 12 is a schematic left side view of the vehicle.

FIG. 13 is a schematic plan view of a vehicle showing a second prior art of the present invention.

FIG. 14 is a schematic left side view of the vehicle.

FIG. 15 is a schematic sectional view of the radiator when a radiator cap is mounted.

FIG. 16 is a schematic sectional view of a radiator in a state where a radiator cap is removed according to the first prior art of the present invention.

FIG. 17 is a schematic cross-sectional view of a radiator in a state where a radiator cap is removed according to the second conventional technique of the present invention.

[Explanation of symbols]

 Reference Signs List 2 radiator 4 radiator cap 6 reserve tank communication passage 8 overflow pipe 10 check valve 10-1 umbrella section 10-2 slit 10-3 large diameter section 10-4 central small diameter section 10-5 inclined surface section 12 check function canceling means 14 Water inlet 16 Small diameter part 18 Tapered wall part

Claims (3)

[Claims] 1. A radiator is provided on a vehicle,
A reserve tank is arranged so that the full level water level is higher than the height position of the radiator cap of the radiator, and the radiator communicates with the radiator in a reserve tank communication passage connecting the reserve tank and the radiator. A check valve that allows only the flow from the radiator to the reserve tank is provided in the reserve tank communication path, and the check function of the check valve is canceled when the radiator cap is attached to the radiator cap, so that both flows can be performed. A radiator reserve tank communication path provided with a non-return function canceling means. 2. The check function canceling means presses the projecting end of the check valve while contacting the projecting end of the check valve when the radiator cap is mounted, so as to cancel the check function of the check valve. The reserve tank communication passage for a radiator according to claim 1, comprising a tapered wall portion provided at a lower end of the radiator cap. 3. The non-return function canceling means presses the protruding end of the check valve by rotating the radiator cap when mounting the radiator cap, thereby pressing the protruding end of the check valve. Claims: To cancel the check function of the check valve at the time of mounting, the radiator cap comprises a wall portion having an arc-shaped cross section provided with a different amount of protrusion to the outer circumference at a lower circumferential portion and a circumferentially equally spaced portion of the radiator cap. The reserve tank communication passage for a radiator according to claim 1.