JP2010078412A - Internal-combustion engine testing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal-combustion engine testing apparatus for being made compact. <P>SOLUTION: The internal-combustion engine testing apparatus 1 includes: a radiator 2; and a cooling water supply unit 3. The radiator 2 cools first cooling water of an internal-combustion engine 9. The cooling water supply unit 3 brings second cooling water to contact with the radiator 2 directly from the outside. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a test apparatus used for testing an internal combustion engine.

When testing an internal combustion engine, a test apparatus is used in order to make the temperature, flow rate and pressure of the cooling water equal to the actual driving conditions. This test apparatus has, for example, a radiator, a fan, and a heat exchanger provided separately from the radiator. When reproducing low-speed traveling, cooling water is cooled by a radiator and a fan. When reproducing high-speed traveling, cooling water is further cooled by a heat exchanger in addition to the radiator and the fan (see, for example, Patent Document 1).
JP-A-2005-77129

However, in this test apparatus, since the radiator, the fan, and the heat exchanger are separately arranged, the apparatus becomes large.
An object of the present invention is to reduce the size of an internal combustion engine test apparatus.

An internal combustion engine test apparatus according to the present invention includes a radiator and a cooling water supply unit. The radiator cools the first cooling water of the internal combustion engine. The cooling water supply unit directly contacts the second cooling water from the outside to the radiator.
In this internal combustion engine test apparatus, the cooling water supply unit can directly bring the second cooling water into contact with the radiator from the outside, so that the cooling efficiency of the radiator can be increased.

  Thereby, in the internal combustion engine test apparatus according to the present invention, it is not necessary to provide a heat exchanger separately from the radiator, and the size can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<Configuration of internal combustion engine test apparatus>
The internal combustion engine test apparatus 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is an overall configuration diagram of an internal combustion engine test apparatus 1. FIG. 2A is a side view of the radiator 2 and the cover portion 31. FIG. 2B is a front view of the radiator 2 and the cover portion 31.
As shown in FIG. 1 and FIG. 2, the internal combustion engine test apparatus 1 includes a radiator 2 that cools the first cooling water of the internal combustion engine 9, a water supply pipe 91, a drain pipe 92, and a second cooling to the radiator 2 from the outside. A cooling water supply unit 3 (an example of a cooling water supply unit) that directly contacts water. The second cooling water is a cooling water of a different system from the first cooling water.
The radiator 2 is connected to the internal combustion engine 9 by a water supply pipe 91 and a drain pipe 92, and includes an upper water collecting pipe 21 (an example of a first water collecting pipe), a lower water collecting pipe 22 (an example of a second water collecting pipe), A pair of frames 23, a plurality of cooling pipes 24, and a plurality of fins 25 are provided. In the present embodiment, the radiator 2 is a longitudinal flow type.

The upper water collection pipe 21 is a water collection pipe on the water supply side, and is connected to the internal combustion engine 9 by a water supply pipe 91. The upper water collecting pipe 21 has a water supply port 26 connected to the water supply pipe 91. The lower water collecting pipe 22 is a water collecting pipe on the drain side, and is connected to the internal combustion engine 9 by a drain pipe 92. The lower water collecting pipe 22 has a drain outlet 27 connected to a drain pipe 92. Since the radiator 2 is a vertical flow type, the upper water collecting pipe 21 and the lower water collecting pipe 22 are arranged vertically. The upper water collecting pipe 21 and the lower water collecting pipe 22 are connected by a pair of frames 23. One frame 23 is formed with a hole 29 for allowing the second cooling water to escape.
The plurality of cooling pipes 24 are pipes that connect the upper water collecting pipe 21 and the lower water collecting pipe 22, and are arranged side by side in the left-right direction in FIG. Corrugated fins 25 are arranged between the cooling pipes 24. The fins 25 extend from the upper water collecting pipe 21 to the lower water collecting pipe 22. The first cooling water flowing into the upper water collecting pipe 21 flows into the lower water collecting pipe 22 through the plurality of cooling pipes 24. Most of the heat quantity held by the first cooling water is radiated to the outside of the radiator 2 when flowing through the cooling pipe 24. Assuming that the main range for radiating the amount of heat held in the first cooling water is the core portion C, the core portion C is formed by the frame 23, the cooling pipe 24 and the fins 25. In order to increase the cooling efficiency of the radiator 2, a cooling water supply unit 3 that directly contacts the second cooling water with the radiator 2 is provided.

The cooling water supply unit 3 includes a cover portion 31, a flow rate adjustment valve 32, a pump 33, a first tank 34, and a second tank 37.
The cover part 31 is a part that covers part of the radiator 2 (more specifically, part of the core part C), and includes a first cover part 38 and a second cover part 39. The 1st cover part 38 and the 2nd cover part 39 are formed, for example with the iron plate. Details of the cover 31 will be described later.
The pump 33 supplies the second cooling water stored in the first tank 34 to the cooling flow path P formed by the cover part 31. The flow rate adjustment valve 32 is a valve for adjusting the flow rate of the second cooling water supplied from the pump 33. The flow rate adjusting valve 32 can manually or automatically adjust the flow rate of the second cooling water according to the conditions of the first cooling water. The second tank 37 accommodates the radiator 2 and the cover portion 31. The 2nd cooling water discharged | emitted from the drainage part 36 (after-mentioned) of the cover part 31 is stored temporarily. The second tank 37 is connected to the first tank 34 by piping. Since the discharge port (not shown) of the second tank 37 is disposed above the water surface of the first tank 34, the second cooling water accumulated in the second tank 37 is transferred to the first tank 34 due to the head difference. Return. The 2nd cooling water which returned to the 1st tank 34 is sent to the cover part 31 by the pump 33 again. Thus, the pump 33, the first tank 34, and the second tank 37 constitute a circulation system of the second cooling water.

<Composition of cover part 31>
The first cover portion 38 is disposed on the first side S1 of the radiator 2 and is fixed to the pair of frames 23 so as to cover most of the first side S1 of the core portion C. The first cover portion 38 is fixed to the frame 23 by, for example, seal welding so that the second cooling water does not leak. Further, the lower portion of the first cover portion 38 is sealed and welded to the lower water collecting pipe 22.
The first cover part 38 has four first cover blocks 38a. The first cover block 38a is a portion protruding from the core portion C to the first side S1, and extends over the entire width direction of the core portion C (left-right direction in FIG. 2B). As shown in FIG. 2A, the first cover block 38a has a substantially C-shaped cross section. A part of the cooling flow path P through which the second cooling water flows is formed between the first cover block 38a and the core part C.

The four first cover blocks 38a are arranged side by side in the vertical direction. A water supply unit 35 is attached to the first cover block 38a located at the lowest level. The second cooling water is supplied from the pump 33 to the water supply unit 35. The water supply part 35 is arrange | positioned in the center vicinity of the width direction of the 1st cover block 38a.
The second cover portion 39 is disposed on the second side S2 of the radiator 2, and is fixed to the pair of frames 23 so as to cover the entire surface of the second side S2 of the core portion C. The second cover portion 39 is fixed to the frame 23 by, for example, seal welding so that the second cooling water does not leak. The upper and lower portions of the first cover portion 38 are sealed and welded to the upper water collecting pipe 21 and the lower water collecting pipe 22, respectively.
The second cover part 39 has a second lower cover block 39a and three second cover blocks 39b. The second lower cover block 39a and the second cover block 39b are substantially C-shaped portions protruding from the core portion C to the second side S2, and extend over the entire width direction of the core portion C. A part of the cooling flow path P through which the second cooling water flows is formed between the second lower cover block 39a and the core part C. A part of the cooling flow path P through which the second cooling water flows is also formed between the second cover block 39b and the core part C.

The three second cover blocks 39b are arranged side by side in the vertical direction. A second lower cover block 39a is disposed below the second cover block 39b located at the lowermost part. The vertical dimension of the second cover block 39b is the same as that of the first cover block 38a. That is, the second cover block 39b has the same shape as the first cover block 38a. On the other hand, the vertical dimension of the second lower cover block 39a is larger than the second cover block 39b and the first cover block 38a, and is about 1.5 times the vertical dimension of the second cover block 39b. For this reason, the second cover block 39b is arranged in a state of being shifted by about half from the first cover block 38a in the vertical direction.
Further, a gap is secured between the first cover block 38a located on the uppermost stage and the upper water collecting pipe 21. This gap can function as a drainage part 36 through which the second cooling water flows out. The vertical dimension of the gap is set to about half of the vertical dimension of the first cover block 38a.

Thus, the core part C of the radiator 2 is substantially surrounded by the first cover part 38 and the second cover part 39, and the upper water collecting pipe 21, the lower water collecting pipe 22, the first cover part 38, and the second cover. The portion 39 and the pair of frames 23 form a cooling flow path P through which the second cooling water flows.
Further, the second lower cover block 39a has a large vertical dimension, and the second cover block 39b is arranged in a state of being displaced by about half from the first cover block 38a. Thus, the second cooling water flows upward while going back and forth between the first side S1 and the second side S2 of the radiator 2. The flow of the second cooling water is substantially uniform in the width direction, and the second cooling water takes the heat of the first cooling water through the cooling pipe 24 and the fins 25, so that the first cover covers the drain cover 36. It flows out of the part 38.

<Operation of internal combustion engine test device>
The pump 33 of the cooling water supply unit 3 is started, and the cooling water supply unit 3 starts supplying the second cooling water to the radiator 2. The second cooling water supplied to the water supply part 35 flows through the cooling flow path P formed in the first cover part 38 and the second cover part 39. Specifically, as shown in FIGS. 2 (A) and 2 (B), the second cooling water flows upward so as to travel back and forth between the first side S1 and the second side S2 of the radiator 2. When the second cooling water flows out from the drainage section 36, the second cooling water is temporarily stored in the second tank 37 and flows to the first tank 34.
When the supply of the second cooling water by the cooling water supply unit 3 is stabilized, the internal combustion engine 9 is started. With the start of the internal combustion engine 9, the operation of the cooling water pump 93 is started, and the first cooling water flows through the radiator 2.

The first cooling water flowing into the upper water collecting pipe 21 flows into the lower water collecting pipe 22 through the plurality of cooling pipes 24. While flowing through the cooling pipe 24, heat exchange is performed between the first cooling water and the second cooling water via the cooling pipe 24 and the fins 25. When the heat exchange is performed, the second cooling water flows so as to move back and forth between the first side S1 and the second side S2 of the radiator 2, so that the time during which the second cooling water is in contact with the core portion C may be increased. it can. In addition, since the main flow direction of the second cooling water is opposite to the main flow direction of the first cooling water, the flow of the first cooling water and the second cooling water is a counter flow. For this reason, the efficiency of heat exchange can be improved.
In addition, when it is not desired to cool the first cooling water too much, the flow rate of the second cooling water is decreased by the flow rate adjusting valve 32. When the flow rate of the second cooling water is small, the second cooling water flows out from the hole 29 provided in the frame 23. For this reason, the second cooling water does not reach the drainage part 36 and accumulates in the cooling flow path P only up to the height of the hole 29. That is, the range of the core part C which 2nd cooling water contacts can be narrowed, and overcooling of 1st cooling water can be prevented with a simple structure.

<Features>
The characteristics of the internal combustion engine test apparatus 1 described above are summarized below.
(1)
In the internal combustion engine test apparatus 1, the cooling water supply unit 3 can directly bring the second cooling water into contact with the radiator 2 from the outside, so that the cooling effect in the radiator 2 can be enhanced. Thereby, it is not necessary to provide a heat exchanger separately from the radiator 2, and the internal combustion engine test apparatus 1 can be downsized.
(2)
Since the cooling flow path P is formed by the cover part 31, the cooling efficiency in the radiator 2 can be enhanced with a simple configuration.

(3)
The 1st cover part 38 is arrange | positioned at the 1st side S1 of the radiator 2, and the 2nd cover part 39 is arrange | positioned at the 2nd side S2 of the radiator 2 so that a part of radiator 2 may be inserted | pinched. A cooling flow path P through which the second cooling water flows is formed by a part of the radiator 2, the first cover portion 38, and the second cover portion 39. The cooling flow path P is disposed so that the second cooling water can travel between the first side S1 and the second side S2 of the radiator 2. With these configurations, the time during which the second cooling water is in contact with the radiator 2 can be lengthened, and the cooling efficiency in the radiator 2 can be further increased.
(4)
Since the flow direction of the second cooling water flowing through the cover portion 31 is substantially opposite to the flow direction of the first cooling water flowing through the plurality of cooling pipes 24, the flow directions of the first cooling water and the second cooling water are It becomes counter flow. By making it counter flow, the cooling efficiency in the radiator 2 can be improved.

Here, the “flow direction of the second cooling water” is a direction in which the second cooling water is generally directed when the cooling channel P is considered as a whole. “The flow direction of the second cooling water is substantially opposite to the flow direction of the first cooling water” means that the flow direction of the second cooling water is within the range in which the cooling efficiency of the radiator 2 can be increased. The case where it deviates from the flow direction is also included.
(5)
Since the second cooling water can be released through the holes 29, the second cooling water is accumulated in the cooling flow path P only up to the height of the holes 29 when the flow rate of the second cooling water is small. That is, the range of the core part C which 2nd cooling water contacts can be narrowed, and overcooling of 1st cooling water can be prevented with a simple structure.
(6)
Since the cooling water supply unit 3 has the second tank 37, the time until the second cooling water returns to the first tank 34 can be lengthened, and the amount of heat taken by the second cooling water is radiated to the outside. Can be promoted.

[Other Embodiments]
The specific configuration of the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the scope of the invention.
In addition, about the structure which has the substantially same function as the above-mentioned embodiment, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.
(A)
In the above-described embodiment, the first side S <b> 1 and the second side S <b> 2 of the radiator 2 are covered by the cover part 31, but the cover part may be disposed only on one side of the radiator 2. For example, as illustrated in FIG. 3, the cover 131 may be disposed only on the first side S1 of the core C. In this case, the second cooling water supplied from the water supply unit 35 is discharged from the second side S <b> 2 of the radiator 2 while being in contact with the cooling pipe 24 and the fins 25. That is, the drainage part 36 is formed on the entire second side S2 of the radiator 2.

Even in this case, since the second cooling water is in direct contact with the radiator 2, the cooling effect of the radiator 2 can be enhanced, and the internal combustion engine test apparatus 1 can be downsized.
(B)
The structure which injects the 2nd cooling water toward the radiator 2 with a nozzle may be sufficient. For example, as shown in FIGS. 4 and 5, the cooling water supply unit 203 has an injection unit 231. The injection unit 231 includes a water collection pipe 233, three branch pipes 232, and a plurality of injection nozzles 234. Three injection nozzles 234 are fixed to one branch pipe 232. The three branch pipes 232 are arranged at equal intervals in the width direction. The three injection nozzles 234 are arranged at equal intervals in the vertical direction. For example, the second cooling water is sprayed in a conical shape from the spray nozzle 234. The injected second cooling water comes into contact with the core portion C of the radiator 2.

Even in this case, since the second cooling water is in direct contact with the radiator 2, the cooling efficiency of the radiator 2 can be increased, and the internal combustion engine test apparatus 1 can be downsized.
(C)
The hole 29 may be formed in the cover 31 instead of the radiator 2, and the hole 29 may be formed in both the radiator 2 and the cover 31.
Further, for example, a valve may be attached to the hole 29 so that the hole 29 can be opened and closed.
(D)
Although the above-mentioned radiator 2 is a vertical flow type, the radiator 2 may be a horizontal flow type. Even if the radiator 2 is a lateral flow type, the above-described cover part 31, cover part 131, and injection unit 231 can be applied.

  Since the internal combustion engine test apparatus according to the present invention can be downsized, the present invention is useful in the field of internal combustion engines.

Overall configuration of internal combustion engine test equipment (A) Side view of radiator and cover part, (B) Front view of radiator and cover part (A) Side view of radiator and cover part, (B) Front view of radiator and cover part (another embodiment) Overall configuration diagram of internal combustion engine test apparatus (another embodiment) (A) Side view of radiator and cover part, (B) Front view of radiator and cover part (another embodiment)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal combustion engine test apparatus 2 Radiator 21 Upper water collection pipe (an example is a 1st water collection pipe)
22 Lower water collecting pipe (example of second water collecting pipe)
23 Frame 24 Cooling pipe 25 Fin 26 Water supply port 27 Drainage port 29 Hole 3 Cooling water supply unit (an example of cooling water supply unit)
31 Cover part 38 1st cover part 38a 1st cover block 39 2nd cover part 39b 2nd cover block 35 Water supply part 36 Drainage part 32 Flow control valve 33 Pump 34 1st tank 37 2nd tank (an example of a case)

Claims (8)

A test apparatus for an internal combustion engine,
A radiator for cooling the first cooling water of the internal combustion engine;
A cooling water supply unit that directly contacts the second cooling water from the outside to the radiator;
An internal combustion engine test apparatus. The cooling water supply part is a member that covers at least a part of the radiator, and has a cover part that forms a cooling channel through which the second cooling water flows while in contact with the radiator.
The internal combustion engine test device according to claim 1. The cover portion has a first cover portion that is disposed on the first side of the radiator and covers at least a part of the radiator.
The internal combustion engine test device according to claim 2. The cover part further includes a second cover part disposed on the second side of the radiator so as to sandwich at least a part of the radiator,
The cooling flow path is formed by the first cover part and the second cover part, and is arranged so that the second cooling water can travel between the first side and the second side of the radiator. ,
The internal combustion engine test apparatus according to claim 3. The radiator includes a first water collecting pipe into which the first cooling water flows, a plurality of cooling pipes connected to the first water collecting pipe, and the first water pipe connected to the plurality of cooling pipes and flowing through the plurality of cooling pipes. A second water collecting pipe for collecting cooling water, and fins attached to the plurality of cooling pipes,
The flow direction of the second cooling water flowing through the cover portion is substantially opposite to the flow direction of the first cooling water flowing through the plurality of cooling pipes.
The internal combustion engine test device according to any one of claims 2 to 4. At least one of the cover part and the radiator has at least one hole for allowing the second cooling water to escape.
The internal combustion engine test device according to any one of claims 2 to 5. The cooling water supply unit further includes a case that accommodates the radiator and the cover part and can store the second cooling water discharged from the cover part.
The internal combustion engine test device according to any one of claims 1 to 5. The cooling water supply unit has at least one injection nozzle that injects the second cooling water toward at least a part of the radiator.
The internal combustion engine test device according to claim 1.

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