JPH0370645B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine cooling system for a transport vehicle such as a truck that has a relatively long body. This invention relates to an engine cooling system for a transport vehicle that has a function.

[Prior Art] As a conventional technology regarding a vehicle engine cooling system, first, as shown in Japanese Utility Model Application Publication No. 51-50130, water channels are formed in the left and right main girders of a tracked vehicle. There are some that reduce the burden on the radiator installed at the front of the vehicle by circulating engine cooling water to cool the engine. Next, Utsukai Showa 58
As shown in Publication No. 81121, by changing the position of the radiator from the front of the cab to the space provided in the cab roof, and increasing the amount of air blown by passing the running wind hitting the front of the vehicle through the radiator, Some radiators have increased cooling capacity.

Although it is not an engine cooling system, it is related to an oil cooler for an engine, etc., for example, as shown in Japanese Utility Model Application Publication No. 57-39880, an oil passage is formed in a head guard formed at the top of a cargo handling vehicle. In some cases, the cooling ability of the oil cooler was improved by circulating oil from the engine, etc., for cooling.

On the other hand, as a conventional technology for a heat exchanger constituting a main part of a cooling device, for example, as shown in Japanese Utility Model Application Publication No. 55-8817 and Japanese Utility Model Application Publication No. 55-14957, By polymerizing and bonding the formed panels together to integrally mold the heat exchanger, there has been a solution that eliminates the trouble of assembling the tube and the main body that supports it as separate parts.

[Problems to be Solved by the Invention] However, although the three conventional technologies related to the cooling device described above all have in common that they increase the cooling capacity, the first technology simply provides a straight water channel to increase the cooling water. It's just a detour, so
We cannot expect much improvement in cooling capacity due to water channels. Therefore, although the structure was complicated by adding water channels to the existing radiator, it had the disadvantage of being less effective. In addition, in the second case, the radiator's position is simply changed from the front of the cab to the cabin roof, which is not particularly wide, so the heat exchange area of the radiator does not increase dramatically, and the radiator effectively blows air. However, an electric cooling fan is still required for this purpose, and it is not possible to reduce engine horsepower loss due to the rotation of the fan. Moreover, a flap or a rectifying grill must be provided on the front of the cab roof to blow air into the radiator, which has the disadvantage of increasing air resistance. In the third case, the oil cooler is simply installed in the head guard, which corresponds to the cabin roof in a truck, so even if the engine cooling water is cooled instead of temporary oil, the area of the cooler will not increase. Like the second one, it had the drawback of not being as expected.

In addition, although the two conventional technologies related to heat exchangers both have an inlet and an outlet, although the manufacturing process can be expected to be simplified in that the water passage is simultaneously molded by simply polymerizing and bonding two panels. Since there is no air vent opening, it is not possible to inject water for heat exchange.
Or, even if water can be injected, the air is not completely vented and air remains inside the heat exchanger, creating resistance when water flows, and the heat exchanger's original heat exchange performance is not achieved. The drawback was that I couldn't do it.

[Object of the Invention] The object of the present invention has been made in view of the above-mentioned prior art, and by providing a radiator function to the outer panel of the vast body that occupies most of the area of the transport vehicle, the radiator at the front of the vehicle can be In addition to eliminating the cooling fan and its fan motor that were necessary for the radiator, it is possible to reduce air resistance and improve fuel efficiency, while also achieving sufficient cooling performance. An object of the present invention is to provide an engine cooling device for a transport vehicle.

[Summary of the Invention] The structure of the present invention in accordance with the above object is that a radiator for cooling engine cooling water is formed into a panel shape, and this panel-shaped radiator itself constitutes the side skirt, side wall, or underfloor panel of the body. Characterize. This makes it possible to sufficiently cool the engine cooling water without requiring a cooling fan or fan motor, and eliminates the need for a radiator or air intake port on the front of the vehicle.

[Example] An example of the present invention will be described below based on FIGS. 1 to 8. In this embodiment, only a truck is used as a transport vehicle, but the present invention is also common to other large-bodied buses, concrete mixer trucks, fire engines, etc.

As shown in FIG. 1, a side skirt 1 serving as an outer panel of a truck body is composed of a panel-shaped radiator 2. As shown in FIG. The panel-shaped radiator 2 is a panel-shaped radiator of an appropriate size that cools the cooling water of the engine 4 provided in the cab 3. A plurality of radiators are arranged at the side skirts to form the side skirts on both sides of the body 5. They are installed consecutively along the length of the car. Each panel-shaped radiator 2 is provided with an opening 6 for a cooling water inlet and an opening 7 for a cooling water outlet, and a water supply pipe 8 and a drainage pipe 9 extending from the engine 4 are respectively connected in parallel to these. Cooling water for the engine 4 is guided to each panel-shaped radiator 2 and circulated therein.
Although not shown, a circulation pump for circulating cooling water is provided inside the engine 4.

Not only the panel-shaped radiator 2 but also general radiators cool cooling water through heat exchange with air, so the larger the area of heat exchange with air, the higher the cooling performance. Therefore,
If the side skirt 1, which has a very large area and is provided along the entire length of the body in order to close the gap formed below the body, is composed of a plurality of panel-shaped radiators 2, the side skirt can be exposed to air on both the front and back sides. In addition, the total heat exchange area of the panel-shaped radiator 2 with the air is extremely large.

Therefore, in order to install the panel-shaped radiator 2 over a wide area, it is not necessarily limited to the side skirt, but as shown in FIG. It may be the panel 11.

Next, details of the panel-shaped radiator 2 that constitutes the side skirt will be described.

As shown in FIG. 4, the panel-shaped radiator 2 is provided with an inlet chamber 12 and an outlet chamber 13 for water storage on the left and right sides of the panel, and a multi-stage parallel structure is formed between these chambers 12 and 13 to communicate with each other. A group of tubes 14, 14, . It is configured to discharge cooling water from the

This panel-shaped radiator 2 is formed as follows. That is, as shown in FIGS. 5 to 7, the cooling water inlet opening 6, the inlet chamber 12,
Tubes 14, 14... group, outlet chamber 13, and bowl strip portions 17, 1 to become openings 7 for the cooling water outlet
The panels 20 and 20 formed with 8 and 19 are overlapped from the left and right sides, and are adhered by the mating flanges 22 and 22 to form the openings 6 and 7 and the inlet and outlet chambers 12 and 1.
3 and tubes 14, 14... groups are integrally molded.
After the integral molding, the formation of the panel-shaped radiator 2 is completed by attaching the caps 15 and 16 to the cooling water inlet opening 6 and the cooling water outlet opening 7 by welding or brazing, respectively.

Inlet/outlet chamber 1 where cooling water is temporarily stored
The cross-sectional area of tubes 2 and 13 is designed to be more than twice the total cross-sectional area of the tubes 14, 14... group. This is a consideration for smoothing the flow of water within each tube 14 and was obtained from experience.

Note that the panels 20, 20 to be overlapped are not limited to flat plates, but may have curved surfaces, or may have a bowl strip 17 only on one panel 20 as shown in FIG.

Now, the operation of the embodiment configured as described above will be explained.

The cooling water that has circulated within the engine 4 to cool the engine 4 exits the engine 4 and flows into the water supply pipe 8, through which it is transferred from the cab 3 to the body 5, where it is transferred to the panel-shaped radiator 2 that constitutes the side skirt of the body. , 2... in parallel. The cooling water guided to each panel-shaped radiator 2 is cooled by exchanging heat with the air here, and then transferred to the panel-shaped radiator 2,
2... flows out into the drain pipe 9, returns to the engine 4 through this, and is used to cool the engine 4 again.

In this case, the panel radiators 2, 2
... constitute the side skirts, so the total heat exchange area is extremely large. Therefore, the cooling capacity of the panel-shaped radiators 2, 2, etc. is very large and the cooling water is sufficiently cooled without the need to forcefully blow air into these panel-shaped radiators 2. This can sufficiently contribute to cooling the engine 4.

By configuring the side skirt with the panel-shaped radiators 2, 2... in this way, it is no longer necessary to forcefully blow air to these panel-shaped radiators 2, 2... It is possible to eliminate the fan and the fan motor that drives it, thereby eliminating the horsepower loss of the engine used to power these devices and improving fuel efficiency.

Furthermore, not only the radiator but also the cooling fan and fan motor can be eliminated from the narrow cab 3, which leads to space savings and the miniaturization of the cab. Furthermore, by removing the radiator at the front of the cab, there is no need to take in air from the front of the vehicle, so by blocking the air intake at the front of the vehicle and making the surface smooth, the traffic that was caused by this air intake can be reduced. air resistance can be significantly reduced. Unlike the case of bulldozers, forklifts, etc., this reduction in air resistance is particularly significant for trucks that require high speed.

On the other hand, the panel-shaped radiator 2 has two panels 2.
By simply polymerizing and adhering 0 and 20, the internal inlet/outlet chambers 12, 13, tubes 14, 14, etc. are integrally molded, and the fins formed by the bowl strips 17 protruding to the outside are simultaneously molded. Since the process of welding or brazing these parts can be completely omitted, the cost of forming the panel-shaped radiator 2 can be reduced, and its quality and appearance can also be improved.

FIG. 9 shows a modification of the embodiment shown in FIG. 4, and the difference from FIG. 4 is that firstly, horizontal tubes 14, 14, . Vertical tube 2 to increase path length
3, 23... (not limited to being vertical) provides an advantage in that the cooling capacity can be further increased. Also, secondly, the exit chamber 1
3 is provided with an opening 24 for venting air, and a cap 25 is welded or brazed to this opening 24. As a result, when cooling water is injected, the water first enters the inlet chamber 12 and enters the horizontal tube 14.
and exit chamber 13 through vertical tube 23
, and the inside of the panel-shaped radiator 2 is gradually filled. On the other hand, the air in the radiator 2 flows from the bottom to the top through the horizontal tube 14 and the vertical tube 23, and exits to the outside through the mouthpiece 25 through the opening 24 dedicated for air venting. Therefore, it is possible to completely bleed air from the panel-shaped radiator 2, and the advantage is that the cooling water can flow smoothly and the original cooling performance of the radiator can be fully exhibited.

FIG. 10 shows another modification of the embodiment shown in FIG. 9, and the difference from FIG. 9 lies in that the horizontal tube is tilted to form an inclined tube 26. That is, the inclined tube 26 is arranged obliquely so that the root of the outlet chamber 13 is located higher than the root of the inlet chamber 12. This provides the advantage that air can easily escape upwards when cooling water is injected, and that air can be removed more completely.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) The outer panel of the body, which has an area far larger than the space inside the cab, is made up of a panel-shaped radiator, so unlike conventional radiators, which have a radiator in a narrow space at the front of the vehicle, forced ventilation is possible. Since sufficient heat exchange can be performed without any heat exchange, the radiator on the front of the vehicle and the cooling fan and fan motor required for this can be omitted without impairing the cooling capacity. Therefore, it is possible to improve fuel efficiency by eliminating the need for power for driving the fan motor, and also to save space at the front of the vehicle, thereby making it possible to downsize the cab.

(2) With the removal of the radiator at the front of the vehicle, there is no need to take in air from the front of the vehicle, so by blocking the air intake at the front of the vehicle and making the surface smooth, air resistance caused by the air intake can be reduced. It is possible to suppress the increase in speed and improve high-speed performance.

[Brief explanation of drawings]

FIG. 1 is a side structural view of a truck showing a preferred embodiment of the engine cooling system for a transport vehicle according to the present invention, and FIGS. 2 and 3 are diagrams for explaining other embodiments of FIG. 1, respectively. A schematic side view of the truck, FIG. 4 is a front view of a panel-shaped radiator which is a main part of the cooling device, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG. 6 is a sectional view taken along the - line in the same way. , Fig. 7 is a sectional view taken along the - line, and Fig. 8 is a sectional view taken from Fig. 5.
FIG. 9 is a sectional view showing another modification of the embodiment shown in FIG.
1 and 10 are plan views of a panel-shaped heater showing a modification of the embodiment shown in FIG. 4, respectively. In the figure, 1 is a side skirt, 2 is a panel radiator, 4 is an engine, 5 is a body, 6 is an opening for cooling water inlet, 7 is an opening for cooling water outlet, 10 is a side wall of the body, and 11 is a side wall of the body. Underfloor panel, 12
13 is an inlet chamber, 13 is an outlet chamber, 14 is a tube, 17, 18, 19 are bowl strips, 20 is a panel, 24 is an air vent opening, and 26 is an inclined tube.

Claims (1)

[Scope of Claims] 1. An engine cooling device for a transport vehicle, characterized in that a radiator for cooling engine cooling water is formed in a panel shape, and the panel-shaped radiator is used as an outer panel of a body. 2. The engine cooling system for a transport vehicle according to claim 1, wherein the outer plate of the body is a side skirt. 3. The engine cooling device for a transport vehicle according to claim 1 or 2, wherein the outer plate of the body is a side wall. 4. The engine cooling system for a transport vehicle according to claim 1, 2 or 3, wherein the outer panel of the body is an underfloor panel. 5. The above-mentioned panel-shaped radiator is constructed by polymerizing and adhering panels with bowl strips formed on at least one side from the left and right, and integrally molding an inlet chamber, a tube, and an outlet chamber through which cooling water is passed. Claims 1 and 2, which are
The engine cooling device for a transport vehicle according to item 1 or 4. 6 an entrance chamber communicating with the tube;
The outlet chamber is arranged to face each other, and has an opening for cooling water inlet at the top of the inlet chamber, an opening for cooling water outlet at the bottom of the outlet chamber, and an opening for air vent at the top of the outlet chamber. The engine cooling device for a transport vehicle according to claim 5, characterized in that the engine cooling device has an opening. 7. The engine cooling device for a transport vehicle according to claim 6, wherein the tube is arranged obliquely so that the root of the outlet chamber is located higher than the root of the inlet chamber. .