JP2008128133A - Heat medium heat transfer control device for cooling internal combustion engine - Google Patents

Abstract

A cooling medium for cooling an internal combustion engine capable of suppressing not only the temperature difference between the upper and lower bores of each cylinder but also the temperature difference between the cylinders without dividing the cooling heat medium such as cooling water for each cylinder. .
The upper side of the inner wall is not covered by the lower covering member and is directly exposed to the flowing cooling water flow, so that it is easier to cool than the lower side. For this reason, the temperature difference in the upper and lower sides of each bore 18a-18d can be suppressed. Due to the presence of the upper guide members 6 and 8, cooling water having a low temperature rise is guided from the lower side of the inner wall 18 to the upper side at a plurality of locations in the cylinder arrangement direction. Therefore, the upper portions of the bores 18a to 18d can be sufficiently cooled even downstream of the water jacket 16, and the temperature difference between the bores 18a to 18d can be suppressed even between the cylinders. The task is thus achieved.
[Selection] Figure 5

Description

  The present invention is arranged in a grooved heat medium flow path provided between an outer wall and an inner wall of a cylinder block in which a plurality of cylinders are formed, thereby cooling heat flowing in the grooved heat medium flow path. The present invention relates to a heat medium heat transfer adjusting device for cooling an internal combustion engine that adjusts a heat transfer state between a medium and an inner wall.

  There is known an internal combustion engine cooling structure that reduces a temperature difference in the vertical direction of the cylinder bore (the axial direction of the cylinder bore) by separating the inside of the groove-like heat medium flow path in the cylinder block portion of the internal combustion engine in the depth direction. (For example, refer to Patent Document 1). In the internal combustion engine cooling structure of Patent Document 1, the temperature difference in the vertical direction of the bore is reduced by providing a difference in the flow rate of the cooling water between the upper and lower groove-like heat medium passages.

  However, even if the temperature difference in the vertical direction of the bore can be suppressed in the configuration of Patent Document 1, the temperature rises while the cooling water flows between the cylinders for a plurality of cylinders, and the temperature difference in the arrangement direction of the cylinders is It cannot be suppressed.

As a technique for coping with this, a cooling structure has been proposed in which low-temperature cooling water existing on the lower side of the bore is raised to the upper side of each cylinder (see, for example, Patent Document 2).
JP 2000-345838 A (page 3-4, FIG. 1-8) Japanese Patent Laying-Open No. 2005-315118 (page 3-5, FIG. 1)

  In the cooling structure of Patent Document 2, the cooling water in a low temperature state is raised to the upper part of the bore for each cylinder. However, since the cooling water is divided for each cylinder, the flow rate of the cooling water that rises for each cylinder. Need to be adjusted with high accuracy so that the cooling state of the upper bore of each cylinder is the same. However, since it is very difficult to adjust the flow rate of the cooling water with the flow rate adjusting partition plate of Patent Document 2 with high accuracy, the temperature difference in the cylinder arrangement direction cannot be sufficiently suppressed as a result.

  The present invention provides a heat transfer medium for cooling an internal combustion engine that can suppress not only the temperature difference between the upper and lower bores of each cylinder but also the temperature difference between the cylinders without dividing the cooling heat medium such as cooling water for each cylinder. The purpose is an adjusting device.

In the following, means for achieving the above object and its effects are described.
The internal combustion engine cooling heat medium heat transfer control device according to claim 1 is disposed in a groove-shaped heat medium flow path provided between an outer wall and an inner wall of a cylinder block in which a plurality of cylinders are formed. An internal combustion engine cooling heat medium heat transfer adjusting device for adjusting a heat transfer state between the cooling heat medium flowing in the groove-shaped heat medium flow path and the inner wall, wherein the groove extends from the outer wall side. A lower covering member that covers the lower side of the inner wall and exposes the upper side of the inner wall with respect to the cooling heat medium flowing into the groove-shaped heat medium flow channel and flowing in the groove-shaped heat medium flow channel in the cylinder arrangement direction And an upper guide member that is provided in the groove-like heat medium flow path and guides the cooling heat medium flowing outside the lower covering member to the upper side of the inner wall.

  Here, the heat transfer heat adjusting device for cooling the internal combustion engine has no section between the cylinders on either the upper side or the lower side of the inner wall, which is the side where the bore exists in the cylinder block. It flows in the cylinder arrangement direction without being divided for each cylinder.

  Since the lower covering member covers the lower side of the inner wall, the lower side of the inner wall is not directly exposed to the flow of the cooling heat medium flowing from the outer wall side into the grooved heat medium flow path, but is combusted inside. Since the upper side of the inner wall where the heat treatment is performed is directly exposed to the flow of the cooling heat medium flowing in, it is easier to cool than the lower side. For this reason, the temperature difference between the upper and lower bores can be suppressed.

  Due to the presence of the upper guide member, the cooling heat medium flowing from the lower side of the inner wall among the cooling heat medium flowing from the outer wall side is guided to the upper side of the inner wall. As a result, a cooling heat medium having a low temperature rise is introduced to the upper side of the inner wall due to a small amount of heat transfer from the inner wall, so that the cooling heat medium flowing in the cylinder arrangement direction on the upper side of the inner wall Suppression or temperature reduction is sufficiently performed, and the flow rate is also increased. For this reason, on the upper side of the inner wall where the amount of heat transfer to the cooling heat medium is large, cooling is effectively performed so that the temperature difference does not become large even in the cylinder arrangement direction. It is possible to suppress the temperature difference between the cylinders.

In this way, it is possible to suppress not only the temperature difference between the upper and lower bores in each cylinder but also the temperature difference between the cylinders without dividing the cooling heat medium for each cylinder.
According to a second aspect of the present invention, there is provided the heat medium heat control apparatus for cooling an internal combustion engine according to the first aspect, wherein the upper guide member is provided at a plurality of locations in the cylinder arrangement direction.

  As described in the first aspect, even with one upper guide member, cooling on the upper side of the inner wall is effectively performed, and the temperature difference between the upper and lower bores of each cylinder and between the cylinders can be suppressed. Then, one or more other upper guide members exist in the cylinder arrangement direction. As a result, again, a cooling heat medium having a low temperature rise is induced and raised on the upper side of the inner wall from the lower side of the inner wall. For this reason, a low-temperature cooling heat medium is mixed with a low-temperature cooling medium or a low-temperature cooling medium is mixed with the cooling heat-medium that has been heated by a large amount of heat transferred from the upper-side surface of the inner wall by flowing through the upper side of the inner wall. Or This makes it possible to suppress the temperature rise or lower the temperature of the cooling heat medium flowing on the upper side of the inner wall during the flow, so that the upper part of the bore can be sufficiently cooled even on the downstream side of the grooved heat medium flow path. In addition, the temperature difference between the upper and lower bores of each cylinder can be further suppressed, and the temperature difference between the cylinders can also be suppressed.

In this way, it is possible to suppress not only the temperature difference between the upper and lower bores in each cylinder but also the temperature difference between the cylinders without dividing the cooling heat medium for each cylinder.
According to a third aspect of the present invention, there is provided an internal combustion engine cooling heat medium heat transfer control device according to the second aspect, wherein an upper and lower partition member that divides the groove-like heat medium flow path vertically is formed at an upper end of the lower covering member. And an opening for introducing a cooling heat medium guided to the upper side of the inner wall by the upper guiding member into the groove-shaped heat medium flow path above the upper and lower partition members. Is formed.

  As described above, the groove-shaped heat medium flow path may be partitioned using the upper and lower partition members on the upper side and the lower side of the inner wall. Also in this case, the upper and lower partition members are formed with openings for introducing the cooling heat medium into the groove-like heat medium flow path above the upper and lower partition members. For this reason, since the cooling heat medium guided upward by the plurality of upper guide members can easily move to a space above the upper and lower partition members, the low-temperature cooling heat medium can be smoothly placed on the upper side of the inner wall. It is possible to reduce the temperature of the cooling heat medium flowing through the upper side of the inner wall.

  In particular, the flow of the cooling heat medium can be reliably separated into the lower side of the inner wall covered by the lower covering member and the upper side of the inner wall not covered by the lower covering member by the upper and lower partition members. Therefore, the temperature difference suppression adjustment at the top and bottom of the bore can be made more reliable.

  According to a fourth aspect of the present invention, the upper end of the lower covering member is closer to the flow downstream direction of the cooling heat medium in the cylinder arrangement direction. The upper guide member is gradually lowered every time it is disposed.

  Thus, every time the cooling heat medium is guided from the lower side to the upper side of the inner wall, the upper end position of the lower covering member is lowered, thereby increasing the cross-sectional area of the groove-like heat medium flow path on the upper side of the inner wall. is doing. As a result, the cooling efficiency can be improved by suppressing the flow resistance of the cooling heat medium on the upper side of the inner wall that plays an important role in cooling the bore and smoothly flowing.

  The internal combustion engine cooling heat transfer heat control apparatus according to claim 5, wherein the lower covering member covers the lower side of the inner wall through a gap and is more for the cooling than the opening. A flow resistance plate is disposed in the groove-like heat medium flow path above the upper and lower partition members on the upstream side of the flow of the heat medium, and on the upstream side of the flow resistance plate, the upper side of the upper and lower partition members and the A communication port that connects the gap is formed in the upper and lower partition members.

  Thus, the lower covering member may not be covered by being in close contact with the lower side of the inner wall, but may be covered with the lower side of the inner wall via a gap. As described above, the flow resistance plate and the communication port may be formed. As a result, the cooling heat medium heated by flowing on the upper side of the inner wall is caused to flow into the gap, and instead, the cooling medium with a low temperature increase is flowed on the lower side of the inner wall on the outer side of the lower covering member. The heat medium may be newly flowed into the groove-like heat medium flow path on the upper side of the inner wall.

This also suppresses the temperature difference between the upper and lower portions of the bores, allows the upper portion of the bore to be sufficiently cooled even downstream of the groove-like heat medium flow path, and suppresses the temperature difference between the bores even between the cylinders.
In this way, it is possible to suppress not only the temperature difference between the upper and lower bores in each cylinder but also the temperature difference between the cylinders without dividing the cooling heat medium for each cylinder.

  The internal combustion engine cooling heat transfer heat control apparatus according to claim 6, wherein the upper guide member is a flow of the cooling heat medium on an outer surface of the lower covering member. It is characterized by forming an inclined surface that rises from the lower part to the upper part as it goes downstream.

  By forming such an inclined surface, the upper guiding member can be easily realized, and the cooling heat medium flowing outside the lower covering member on the lower side of the inner wall can be easily guided to the upper side of the inner wall.

[Embodiment 1]
1 to 3 show the configuration of a heat transfer heat transfer control device for cooling an internal combustion engine (hereinafter abbreviated as “heat transfer control device”) 2 to which the above-described invention is applied. 1A is a plan view of the heat transfer control device 2, FIG. 1B is a left side view, FIG. 1C is a front view, FIG. 1D is a right side view, and FIG. 2A is a perspective view of the heat transfer control device 2, FIG. 2B is a rear view, and FIG. 2C is a perspective view seen from a different direction from FIG. FIG. 3 shows an exploded configuration of the heat transfer control device 2.

  4 is an explanatory diagram of a state in which the heat transfer control device 2 is assembled to the vehicle-mounted four-cylinder internal combustion engine, and FIG. 5 is a portion after the heat transfer control device 2 is assembled to the vehicle-mounted four-cylinder internal combustion engine. FIG. 6 is a plan view after assembly, and FIG. 7 is a cross-sectional view taken along line XX shown in FIG.

  Here, the heat transfer control device 2 includes a lower covering member 4, upper guide members 6 and 8, and upper and lower partition members 10 and 12. The lower covering member 4 is a part that maintains the shape of the heat transfer control device 2 as a whole, and is made of a material that is higher in rigidity than the upper guiding members 6 and 8 and the upper and lower partition members 10 and 12, here, an olefin resin. Is formed. The shape of the lower covering member 4 is such that when inserted in a water jacket (corresponding to a grooved heat medium flow path) 16 provided in an open deck cylinder block 14 of an internal combustion engine, the lower covering member 4 has a shape relative to the inner wall 18 of the cylinder block 14. Thus, it is formed so that it can be placed in close contact with the lower side, leaving the upper side. That is, the lower covering member 4 is formed in a plate shape whose height is lower than the depth of the water jacket 16 and is thinner than the width of the water jacket 16. The cylindrical shape is connected to the water jacket 16 by the number of cylinders (here, four cylinders consisting of # 1 to # 4), and the inner circumferential surface 4a is shaped like the outer circumferential surface 18e of the inner wall 18. Are almost identical.

  By adopting such a shape, as shown in FIG. 4, the heat transfer control device 2 in which the lower covering member 4, the upper guide members 6, 8 and the upper and lower partition members 10, 12 are integrated in the water jacket 16 is provided. When arranged in the jacket 16, the lower covering member 4 substantially adheres to the outer peripheral surface 18 e of the inner wall 18 as shown in FIG. 7. Therefore, on the lower side of the inner wall 18, a space between the lower covering member 4 and the outer wall 20 serves as a flow path for cooling water (corresponding to a cooling heat medium). For this reason, on the lower side of the inner wall 18, heat transfer from the inner wall 18 side where the bores 18a, 18b, 18c, and 18d are present is reduced, so that the lower side of the inner wall 18 is difficult to be cooled and the temperature of the cooling water flowing therethrough is It is hard to rise. On the contrary, on the upper side of the inner wall 18 that is not covered with the lower covering member 4, heat transfer from the inner wall 18 side increases, so that the upper side of the inner wall 18 is easily cooled and the temperature of the cooling water flowing therethrough rises. Cheap.

  The upper guide members 6 and 8 and the upper and lower partition members 10 and 12 are made of an olefin elastomer. Among these, the upper and lower partition members 10 and 12 are provided at the upper end of the lower covering member 4 and are formed slightly wider than the width of the water jacket 16. Therefore, when the heat transfer control device 2 is pushed into the water jacket 16 as shown in FIG. 4, the inner wall 18 and the outer wall 20 are in close contact with each other as shown in FIGS. The water jacket 16 is divided into upper and lower parts.

  On the other hand, the upper guide members 6, 8 are disposed obliquely between the outer peripheral surface 4 b of the lower covering member 4 and the outer wall 20 from one end of each of the upper and lower partition members 10, 12. The cooling water flows into the water jacket 16 from the inlet 22 formed in the outer wall 20. The upper and lower partition members 10 located upstream of the cooling water flow have a shorter upper guide member 6 at one end on the upstream side. Has been placed. The upper upper guide member 8 is disposed at one end on the upstream side of the upper and lower partition members 12 at the downstream position.

  As a result, as shown by the broken line in FIG. 5, the cooling water flowing in from the inlet 22 is first on the lower side of the inner wall 18 covered with the lower covering member 4 by the inclined surface 6 a of the shorter upper guiding member 6. The upper half of the cooling water flow is guided to the upper side of the inner wall 18 that is not covered by the lower covering member 4. The low-temperature cooling water flow thus induced joins the cooling water flow that has been heated by reaching the upper side of the inner wall 18 directly from the inlet 22 and becomes a large-flow water flow in which the temperature rise is suppressed, It becomes a high-speed flow and goes downstream.

  When passing through the most downstream portion of the upper and lower partition members 10, an opening 24 is formed there as a break between the upper and lower partition members 10 and the upper and lower partition members 12. From the end of the opening 24 on the upper and lower partition members 12 side, the longer upper guide member 8 is arranged in a state of reaching the bottom of the water jacket 16 in an inclined state.

  Therefore, the cooling water flow that has not been guided to the upper side of the inner wall 18 by the upper guide member 6 on the upstream side of the upper and lower partition members 10 and has flowed on the lower side of the inner wall 18 is inclined surface 8 a of the longer upper guide member 8. Is guided to the upper side of the inner wall 18 and merges with the cooling water flow that has flowed from the # 1 cylinder to the # 4 cylinder on the upper side of the inner wall 18.

  The temperature of the cooling water flowing through the upper side of the inner wall 18 due to this confluence is suppressed or lowered, and the cooling water flow that has been increased in flow rate to increase the flow velocity is then changed to the cylinder arrangement shown in FIG. On the back side in the figure of (# 1 to # 4), the upper side of the inner wall 18 flows from the # 4 cylinder toward the # 1 cylinder. Then, it rises to the coolant flow path on the cylinder head side on the # 1 cylinder side.

According to the first embodiment described above, the following effects can be obtained.
(I). In the heat transfer control device 2, neither the upper side nor the lower side of the inner wall 18 on the side where the bores 18 a to 18 d exist in the cylinder block 14 is divided between the cylinders, and the cooling water is divided for each cylinder. It flows in the cylinder arrangement direction without.

  Since the lower covering member 4 covers the lower side of the inner wall 18, the lower side of the inner wall 18 is not directly exposed to the cooling water flow that flows into the water jacket 16 from the outer wall 20 side. Since the upper side of the inner wall 18 to be performed is directly exposed to the flowing cooling water flow, it is more easily cooled than the lower side. For this reason, the temperature difference in the upper and lower sides of each bore 18a-18d can be suppressed.

  Upper guide members 6 and 8 are formed on the outer surface of the lower covering member 4 so as to form inclined surfaces 6a and 8a that rise from the lower portion to the upper portion in the downstream direction of the flow of the cooling water. Due to the presence of the upper guide members 6 and 8, cooling water having a low temperature rise is guided from the lower side of the inner wall 18 to the upper side of the inner wall 18 at a plurality of locations in the cylinder arrangement direction, here two locations.

  That is, the cooling water flowing in from the outer wall 20 side is first guided to the upper side of the inner wall 18 at one place (the upstream upper guide member 6 on the upstream side). As a result, the temperature rise of the cooling water on the upper side of the inner wall 18 is suppressed or the temperature is lowered, the flow rate is increased, and the cooling on the upper side of the inner wall 18 is effectively performed, so that the bores 18a to 18d of each cylinder. The temperature difference between the upper and lower sides can be further suppressed, and the temperature difference between the cylinders can also be suppressed.

  Further, since another upper guide member (here, the longer upper guide member 8 on the downstream side) exists in the cylinder arrangement direction, the temperature rise is low again from the lower side of the inner wall 18 on the upper side of the inner wall 18 again. Cooling water is induced and rises. By this, the cooling water having a relatively low temperature is mixed with the cooling water that has already been heated by flowing through the upper side of the inner wall 18, and the temperature rise of the cooling water that flows through the upper side of the inner wall 18 is suppressed or reduced. Can do. Therefore, the upper portions of the bores 18a to 18d can be sufficiently cooled even downstream of the water jacket 16, and the temperature difference between the bores 18a to 18d can be suppressed even between the cylinders.

In this way, it is possible to suppress not only the temperature difference between the upper and lower bores 18a to 18d in each cylinder but also the temperature difference between the cylinders without dividing cooling water into # 1 to # 4 cylinders.
(B). Upper and lower partition members 10 and 12 that divide the water jacket 16 vertically are formed at the upper end of the lower covering member 4. Further, the upper and lower partition members 10 and 12 are formed with an opening 24 through which cooling water guided to the upper side of the inner wall 18 by the upper guide member 8 is introduced into the water jacket 16 above the upper and lower partition members 10 and 12. Has been.

  As a result, the cooling water guided upward by the upper guide member 8 can easily move to a space above the upper and lower partition members 10, 12, and again on the upper side of the inner wall 18 in the water jacket 16. By introducing low-temperature cooling water, the temperature of the cooling water flowing on the upper side of the inner wall 18 can be suppressed or lowered.

  In particular, the upper and lower partition members 10 and 12 ensure the flow of cooling water to the lower side of the inner wall 18 covered by the lower covering member 4 and the upper side of the inner wall 18 not covered by the lower covering member 4. Since it can isolate | separate, the temperature difference suppression adjustment in the upper and lower sides of the bores 18a-18d can be made more reliable.

[Embodiment 2]
The configuration of the heat transfer control device 102 of this embodiment is shown in FIGS. 8A is a plan view of the heat transfer control device 102, FIG. 8B is a left side view, FIG. 8C is a front view, FIG. 8D is a right side view, and FIG. 9A is a perspective view of the heat transfer adjusting device 102, FIG. 9B is a rear view, and FIG. 9C is a perspective view seen from a direction different from FIG. 9A. FIG. 10 is a partially cutaway view after the heat transfer control device 102 is assembled to a vehicle-mounted four-cylinder internal combustion engine, and FIG. 11 is a cross-sectional view taken along line YY shown in FIG.

  The heat transfer control device 102 of the present embodiment is different from that of the first embodiment in that the upper end of the lower covering member 104 is lowered on the downstream side of the water jacket 116. For this reason, the downstream upper and lower partition members 112 are disposed below the upstream upper and lower partition members 110 in the axial direction of the bores 118a to 118d. Therefore, the length of the downstream upper guide member 108 is shorter than that in the first embodiment. Other configurations are the same as those in the first embodiment.

  With such a configuration, as shown by the broken line in FIG. 10, the cooling water flowing in from the inlet 122 first flows in the lower part of the inner wall 118 covered by the lower covering member 104 by the upstream upper guide member 106. The upper half is guided to the upper side of the inner wall 118 that is not covered by the lower covering member 104. As a result, as in the case of the first embodiment, the coolant merges directly from the inflow port 122 to the upper side of the inner wall 118 to become a high-speed flow and go downstream.

  When passing through the most downstream portion of the upper and lower partition members 110, the opening 124 is formed obliquely as a break between the upper and lower partition members 110 and the upper and lower partition members 112. From the end of the opening 124 on the upper and lower partition members 112 side, the upper guide member 108 is disposed in a state of reaching the bottom of the water jacket 116 in an inclined state. Therefore, the cooling water flow that has flowed on the lower side of the inner wall 118 is guided to the upper side of the inner wall 118, and is merged with the cooling water flow that is heated from the upper side of the inner wall 118 from the # 1 cylinder to the # 4 cylinder. it can.

  The cooling water flow whose temperature is suppressed or lowered by this merging and is increased in flow rate and speeded up thereafter is the upper side of the inner wall 118 on the back side of the cylinder arrangement (# 1 to # 4) shown in FIG. Here, the gas flows from the # 4 cylinder toward the # 1 cylinder on the upper side of the upper and lower partition members 112 wider than the front side. Then, it rises to the coolant flow path on the cylinder head side on the # 1 cylinder side.

According to the second embodiment described above, the following effects can be obtained.
(I). The effects (a) and (b) of the first embodiment are produced. Further, on the downstream side of the opening 124, the cooling water flow path is widened on the upper side of the inner wall 118, that is, on the upper side of the upper and lower partition members 112 as shown in FIG. However, a smooth flow can be maintained without greatly increasing the pressure loss.

[Embodiment 3]
The configuration of the heat transfer control device 202 of this embodiment is shown in FIGS. 12A is a plan view of the heat transfer control device 202, FIG. 12B is a left side view, FIG. 12C is a front view, FIG. 12D is a right side view, and FIG. 13A is a perspective view of the heat transfer adjusting device 202, FIG. 13B is a rear view, and FIG. 13C is a perspective view seen from a direction different from FIG. 14 is an exploded perspective view showing the configuration of the heat transfer control device 202, FIG. 15 is a partially cutaway view after the heat transfer control device 202 is assembled to a vehicle-mounted four-cylinder internal combustion engine, and FIG. 16 is the Z shown in FIG. FIG. 17 is a partially enlarged view of a cross-sectional view taken along the line -Z.

  The heat transfer control device 202 of the present embodiment is different from the first embodiment in the following points. That is, as shown in FIG. 16, gaps 250 and 252 are provided between the lower covering member 204 and the inner wall 218. A step 254 is formed in the lower covering member 204 in the radial direction at the middle of the flow direction, here, at the position of the # 4 cylinder. As a result, the gap 252 on the downstream side is wider than the gap 250 on the upstream side.

  Further, a flow resistance plate 256 is formed on the upper end portion of the lower covering member 204 on the upstream side of the step 254 so as to protrude upward. The upper end of the flow resistance plate 256 reaches the same height as the upper end portion of the inner wall 218.

  Among the two upper and lower partition members 210 and 212 of the present embodiment, the upper upper partition member 210 is connected to a short upper guide member 206 at an intermediate portion close to the upstream side, and upstream from the upper guide member 206. On the side, the upper and lower partition members 210 are formed narrow. The upper and lower partition members 210 are formed with notches 210a on the inner side at the downstream end. As shown in FIG. 15, when the heat transfer control device 202 is attached to the cylinder block 214 and the inner side of the upper and lower partition members 210 contacts the outer peripheral surface of the inner wall 218, the notch 210 a is located upstream of the flow resistance plate 256. A communication port 258 that connects the upper side of the upper and lower partition members 210 and the gap 250 is formed.

  The upper and lower partition members 212 on the downstream side are connected to a long upper guide member 208 at an intermediate portion near the upstream side, and the upper and lower partition members 212 are formed narrower on the upstream side of the upper guide member 208. Therefore, the cooling water on the lower side of the inner wall 218 guided to the upper guide member 208 can flow into the upper space of the upper and lower partition members 212 on the downstream side without being blocked by the flow resistance plate 256 and the upper and lower partition members 212.

  With such a configuration, first, the cooling water introduced to the upper side of the inner wall 218 by the short upper guide member 206, that is, the upper part of the upper and lower partition members 210 reaches the # 4 cylinder as shown in FIG. The flow resistance plate 256 flows into the gaps 250 and 252 from the communication port 258. Then, on the downstream side of the flow resistance plate 256, the cooling water flowing outside the lower covering member 204 on the lower side of the inner wall 218 up to the # 4 cylinder is on the upper side of the inner wall 218, that is, on the downstream side. It will flow upward to the upper side of the upper and lower partition members 212.

According to the third embodiment described above, the following effects can be obtained.
(I). Thus, the same effect as (a) and (b) of the first embodiment is also obtained by replacing the cooling water with a cooling water having a low temperature rise in the course of the cooling water. In addition, since the cooling water is not merged but replaced, the upstream upper and lower partition members 210 and the downstream upper and lower partition members 212 can maintain a smooth flow by suppressing pressure loss even if the upper sectional area is the same. .

[Embodiment 4]
The configuration of the heat transfer control device 302 of this embodiment is shown in FIGS. 18A is a plan view of the heat transfer control device 302, FIG. 18B is a left side view, FIG. 18C is a front view, FIG. 18D is a right side view, and FIG. 19A is a perspective view of the heat transfer adjusting device 302, and FIG. 19B is a rear view. 20 is a partially cutaway view after the heat transfer control device 302 is assembled to a vehicle-mounted four-cylinder internal combustion engine, and FIG. 21 is a cross-sectional view taken along the line S-S shown in FIG.

The heat transfer control device 302 of the present embodiment is different from that of the first embodiment in that there are no upper and lower partition members. Other configurations are the same as those in the first embodiment.
With such a configuration, as shown by the broken line in FIG. 20, the cooling water flowing in from the inlet 322 first flows in the lower side of the inner wall 318 covered with the lower covering member 304 by the upstream upper guide member 306. The upper half is guided to the upper side of the inner wall 318 that is not covered by the lower covering member 304. As a result, the cooling water that has reached the upper side of the inner wall 318 directly from the inlet 322 is joined to the downstream while being transferred from the inner wall 318 side. At the position of the # 4 cylinder, the upper guide member 308 reaching almost the bottom of the water jacket 316 guides the cooling water flow that has flowed on the lower side of the inner wall 318 to the upper side of the inner wall 318. As a result, the low-temperature cooling water flow can be merged with the cooling water flow that has flowed from the # 1 cylinder to the # 4 cylinder through the upper side of the inner wall 318 and heated.

  Due to this merging, the temperature rise of the cooling water that is in direct contact with the outer peripheral surface of the inner wall 318 is reduced or the temperature is lowered. Thereafter, the back side of the cylinder arrangement (# 1 to # 4) shown in FIG. Flows towards # 1 cylinder. Then, it rises to the coolant flow path on the cylinder head side on the # 1 cylinder side.

According to the fourth embodiment described above, the following effects can be obtained.
(I). Although the upper and lower partition members do not exist, the cooling water that is in direct contact with the outer peripheral surface of the inner wall 318 on the upper side of the inner wall 318 decreases in density due to the temperature rise and tends to flow on the upper side. Difficult to mix with cooling water. However, it is possible to suppress the temperature rise on the upper side or to lower the temperature by raising the low-temperature cooling water on the lower side by the upper guide member 308 in the middle of the flow and mixing it with the cooling water on the upper side. Thus, an effect equivalent to that of the first embodiment (A) can be produced with a simpler configuration.

[Other embodiments]
(A). In each of the embodiments described above, two upper guide members are provided in the flow direction of the cooling water, but three or more upper guide members may be provided. For example, the configuration of the first embodiment may be changed as shown in FIGS. That is, the four upper guiding members 406, 407, 408, and 409 are arranged from the upstream end portions of the four upper and lower partition members 410, 411, 412, and 413 to the lower covering member 404. Note that the upper guide members 406 to 409 are elongated downward as they are arranged downstream.

  Thus, by raising the low-temperature cooling water at three locations in the middle of the cooling water flow, the temperature between the cylinders can be made more uniform and the temperature difference can be suppressed. The number of upper guide members may be three or five or more. The same applies to the configurations of the second to fourth embodiments.

  (B). In order to divide and join the low-temperature cooling water more evenly, it is preferable to divide the cooling water as upstream as possible in the water jacket. For this purpose, for example, with respect to the configuration of FIGS. 22 and 23, guide plates 452 and 454 along the cylinder arrangement direction as shown in FIG. 24 may be provided at the tips of the intermediate upper guide members 407 and 408. 24A is a perspective view, and FIG. 24B is a front view.

  (C). In each of the above embodiments, the lower covering member is formed of an olefin-based resin. However, any member may be used as long as the shape of the water jacket can be maintained even when the inside of the water jacket is in a high temperature state during operation of the internal combustion engine. For example, it can be formed of a relatively rigid resin such as a polyamide-based thermoplastic resin (PA66, PPA, etc.), an olefin-based thermoplastic resin (PP), a polyphenylene sulfide-based thermoplastic resin (PPS), or the like. In addition, you may reinforce with glass fiber etc. in order to raise rigidity further. Further, the same material as the upper guide member and the upper and lower partition members described below may be used.

  In each of the embodiments described above, the upper guide member and the upper and lower partition members are formed of an olefin-based elastomer, but are preferably formed of a rubber-like elastic body or other flexible resin. For example, examples of rubber-like elastic bodies include vulcanized rubber-based EPDM and silicone, and olefin-based thermoplastic elastomers. The upper guide member and the upper and lower partition members are selected from materials that are particularly durable against cooling water. Further, the same material as that of the lower covering member described above may be used.

  (D). The upper guide member and the upper and lower partition members are bonded to the lower covering member by one of adhesion, heat caulking, fitting, welding, injection molding, etc., mechanical fixing (eyelet, clip, etc.), or a combination thereof. Thus, an integrated heat transfer control device can be realized. In addition, it is not necessary to integrate in particular, and it should just be arrange | positioned in a water jacket and to exhibit the function of a heat-transfer control apparatus as a whole.

  (E). In each of the above embodiments, the edge of the upper guiding member is attached to the outer peripheral surface of the lower covering member. However, the lower covering member is formed by forming only the inclined surface on the outer peripheral surface of the lower covering member. It is good also as a structure which also made the upper induction member serve as.

FIG. 3 is a configuration explanatory diagram of a heat transfer control device according to the first embodiment. FIG. 3 is a configuration explanatory diagram of a heat transfer control device according to the first embodiment. FIG. 3 is an exploded explanatory view of the heat transfer control device according to the first embodiment. The assembly explanatory drawing to the cylinder block of the heat-transfer adjustment apparatus of Embodiment 1. FIG. FIG. 2 is a partial cutaway view of a state in which the heat transfer control device of the first embodiment is assembled to a vehicle-mounted four-cylinder internal combustion engine. FIG. 3 is a plan view after the heat transfer control device according to the first embodiment is assembled to a vehicle-mounted four-cylinder internal combustion engine. Sectional drawing which shows the arrangement | positioning state of the heat-transfer adjustment apparatus of Embodiment 1. FIG. FIG. 4 is a configuration explanatory diagram of a heat transfer control device according to a second embodiment. FIG. 4 is a configuration explanatory diagram of a heat transfer control device according to a second embodiment. FIG. 6 is a partial cutaway view of a state in which the heat transfer control device of Embodiment 2 is assembled to a vehicle-mounted four-cylinder internal combustion engine. Sectional drawing which shows the arrangement | positioning state of the heat-transfer adjustment apparatus of Embodiment 2. FIG. FIG. 6 is a configuration explanatory diagram of a heat transfer control device according to a third embodiment. FIG. 6 is a configuration explanatory diagram of a heat transfer control device according to a third embodiment. FIG. 6 is an exploded explanatory view of a heat transfer control device according to Embodiment 3. FIG. 6 is a partial cutaway view of a state in which the heat transfer control device of Embodiment 3 is assembled to a vehicle-mounted four-cylinder internal combustion engine. Sectional drawing which shows the arrangement | positioning state of the heat-transfer adjustment apparatus of Embodiment 3. FIG. FIG. 9 is a partial explanatory view of a heat transfer control device according to Embodiment 3. FIG. 6 is a configuration explanatory diagram of a heat transfer control device according to a fourth embodiment. FIG. 6 is a configuration explanatory diagram of a heat transfer control device according to a fourth embodiment. FIG. 9 is a partially cutaway view of a state in which the heat transfer control device of Embodiment 4 is assembled to a vehicle-mounted four-cylinder internal combustion engine. Sectional drawing which shows the arrangement | positioning state of the heat-transfer adjustment apparatus of Embodiment 4. FIG. Structure explanatory drawing of the heat-transfer control apparatus of other embodiment. Structure explanatory drawing of the heat-transfer control apparatus of other embodiment. Structure explanatory drawing of the heat-transfer control apparatus of other embodiment.

Explanation of symbols

  2 ... Heat transfer control device, 4 ... Lower covering member, 4a ... Inner peripheral surface, 4b ... Outer peripheral surface, 6, 8 ... Upper guide member, 6a, 8a ... Inclined surface, 10, 12 ... Upper and lower partition members, 14 ... Cylinder Block, 16 ... Water jacket, 18 ... Inner wall, 18a, 18b, 18c, 18d ... Bore, 18e ... Outer peripheral surface, 20 ... Outer wall, 22 ... Inlet, 24 ... Opening, 102 ... Heat transfer control device, 104 ... Down Cover member, 106, 108 ... Upward guiding member, 110, 112 ... Upper and lower partition member, 116 ... Water jacket, 118 ... Inner wall, 118a, 118b, 118c, 118d ... Bore, 122 ... Inlet, 124 ... Opening, 202 ... Heat transfer control device, 204 ... lower covering member, 206, 208 ... upper guiding member, 210, 212 ... upper and lower partition members, 210a ... notch, 214 ... cylinder block, 218 Inner walls, 250, 252 ... Gap, 254 ... Step, 256 ... Flow resistance plate, 258 ... Communication port, 302 ... Heat transfer control device, 304 ... Lower covering member, 306,308 ... Upper guide member, 316 ... Water jacket, 318 ... inner wall, 322 ... inlet, 404 ... lower covering member, 406,407,408,409 ... upper guide member, 410,411,412,413 ... upper and lower partition members, 452,454 ... guide plate.

Claims (6)

The cooling heat medium flowing in the groove-shaped heat medium flow path is disposed in the groove-shaped heat medium flow path provided between the outer wall and the inner wall of the cylinder block in which a plurality of cylinders are formed, A heat transfer heat transfer control device for cooling an internal combustion engine that adjusts a heat transfer state with an inner wall,
Covering the lower side of the inner wall and the upper side of the inner wall with respect to the cooling heat medium flowing into the groove-like heat medium flow channel from the outer wall side and flowing in the groove-shaped heat medium flow channel in the cylinder arrangement direction A lower covering member that exposes,
An upper guide member that is provided in the groove-like heat medium flow path and guides the cooling heat medium flowing outside the lower covering member to the upper side of the inner wall;
An internal combustion engine cooling heat transfer heat transfer control device comprising: 2. The heat transfer heat adjusting device for cooling an internal combustion engine according to claim 1, wherein the upper guide member is provided at a plurality of locations in the cylinder arrangement direction. The upper and lower partition members that divide the groove-like heat medium flow path into upper and lower portions are formed at an upper end of the lower covering member according to claim 2, and the inner wall is formed by the upper guide member on the upper and lower partition members. An internal combustion engine cooling heat medium heat transfer is formed, wherein an opening is formed for introducing the cooling heat medium guided to the upper side of the upper part into the grooved heat medium flow path above the upper and lower partition members Adjusting device. The upper end of the lower covering member according to claim 2 or 3 is gradually lowered every time it passes through the position where the upper guide member is disposed, as it goes in the downstream direction of flow of the cooling heat medium in the cylinder arrangement direction. A heat medium heat transfer control device for cooling an internal combustion engine. 4. The lower covering member according to claim 3, wherein the lower covering member covers the lower side of the inner wall through a gap, and the groove shape above the upper and lower partition members on the flow upstream side of the cooling heat medium from the opening. A flow resistance plate is disposed in the heat medium flow path, and a communication port that connects the upper side of the upper and lower partition members and the gap is formed in the upper and lower partition members on the upstream side of the flow resistance plate. An internal combustion engine cooling heat medium heat transfer adjusting device. 6. The upper guide member according to claim 1, wherein the upper guide member forms an inclined surface that rises from the lower part to the upper part on the outer surface of the lower covering member in the downstream direction of the cooling heat medium. A heat transfer heat transfer control device for cooling an internal combustion engine.

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