JP2009156156A - Water inlet housing and water inlet housing with oil cooler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water inlet housing and a water inlet housing with an oil cooler capable of suitably inhibiting temperature rise of cooling water supplied to the oil cooler. <P>SOLUTION: A first channel 80 which is a channel communicating to a cooling water discharge passage 32 in which cooling water discharged from a water pump flows and to which an outer pipe 35 communicating to a cooling water inlet of the oil cooler is connected is formed in the water inlet housing 20. A second channel which is a channel communicating to a suction side channel of the water pump and connected to the cooling water outlet of the oil cooler is formed in the water inlet housing 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water inlet housing attached to a water-cooled internal combustion engine and a water inlet housing with an oil cooler.

In a water-cooled internal combustion engine, cooling water cooled by a radiator is introduced into the engine through a water inlet housing fixed to the engine body.
On the other hand, a lubrication system for an internal combustion engine may be provided with a water-cooled oil cooler that cools the oil. In order to supply and discharge cooling water to such an oil cooler, for example, the one described in Patent Document 1 is used. Then, it is as follows.

That is, a supply flow path for supplying cooling water to the oil cooler and a discharge flow path for flowing the cooling water discharged from the oil cooler are integrally formed inside the water inlet housing. And by attaching an oil cooler to the water inlet housing, the cooling water inlet of the oil cooler communicates with the supply flow path, and the cooling water outlet of the oil cooler communicates with the discharge flow path. .
JP 2002-168148 A

  By the way, since the water inlet housing described in Patent Document 1 is fixed to the engine body, the temperature of the housing increases due to heat conduction from the internal combustion engine. For this reason, the temperature of the cooling water flowing in the supply flow path formed inside the housing is likely to be higher than that before flowing into the housing. In this way, when the temperature of the cooling water supplied to the oil cooler increases, the temperature difference between the cooling water and the oil decreases, so that the amount of heat transferred from the oil to the cooling water decreases, and as a result, the oil cooler There is a possibility that the cooling efficiency is lowered.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a water inlet housing and a water inlet housing with an oil cooler that can suitably suppress an increase in the temperature of cooling water supplied to the oil cooler. There is to do.

In the following, means for achieving the above object and its effects are described.
The invention according to claim 1 is a housing fixed to an engine body of a water-cooled internal combustion engine and having a cooling water flow path formed therein, and an oil cooler having a cooling water inlet and a cooling water outlet is attached to the housing. In the water inlet housing, the water inlet housing includes a first flow path that is connected to the cooling water flow path and is connected to an external pipe that is connected to the cooling water inlet of the oil cooler. The gist of the present invention is that a flow path communicating with the cooling water flow path and connected to the cooling water outlet of the oil cooler is formed.

  According to this configuration, the supply flow path for supplying cooling water to the oil cooler is configured by the external pipe and the first flow path. Therefore, the length of the supply flow path in the water inlet housing can be shortened as compared with the conventional case where the entire supply flow path is formed inside the water inlet housing. Therefore, it is possible to reduce the amount of heat transferred from the water inlet housing to the cooling water, thereby suitably suppressing the temperature rise of the cooling water supplied to the oil cooler. In this configuration, since the external pipe communicating with the coolant inlet of the oil cooler is connected to the first flow path, the position of the first flow path can be determined by appropriately changing the length and shape of the external pipe. Can be set relatively freely. Therefore, it is desirable to form the first flow path so that the distance between the part communicating with the cooling water flow path in the water inlet housing and the part to which the external pipe is connected is as short as possible.

  In this configuration, a second flow path that is connected to the cooling water flow path in the water inlet housing and is connected to the cooling water outlet of the oil cooler is formed inside the water inlet housing. The cooling water discharged from the oil cooler is returned to the cooling water passage through the second passage. Therefore, it is not necessary to form a flow path for returning the cooling water discharged from the oil cooler to the cooling water flow path by using an external pipe, thereby reducing the number of parts, the number of assembly steps, improving the maintainability, etc. Will also be possible.

  According to a second aspect of the present invention, in the first aspect of the present invention, an oil passage through which oil is introduced into the oil cooler and oil discharged from the oil cooler flows in the water inlet housing. The gist is that the road is formed.

  According to this configuration, it is not necessary to form an oil passage for introducing oil into the oil cooler and an oil passage through which the oil discharged from the oil cooler flows, so that the number of parts and assembly man-hours can be reduced or maintainability can be reduced. Improvement can be achieved.

  The gist of the invention of claim 3 is that, in the invention of claim 1 or 2, the water inlet housing is formed with a pump chamber of a water pump.

  According to this configuration, the water pump can be attached to the water inlet housing. Therefore, compared with the case where the water inlet housing and the water pump are provided separately, the flow path length between the water pump and the first flow path can be shortened, so that the first flow from the water pump can be reduced. It is also possible to reduce the flow path resistance generated up to the road. Therefore, it is possible to increase the amount of cooling water supplied to the first flow path. If the amount of cooling water supplied to the first flow path is increased, the cooling water supplied to the oil cooler is shortened because the heat receiving time when the cooling water passes through the first flow path is shortened. Temperature rise can be suppressed. Moreover, the cooling efficiency of the oil cooler is increased by increasing the amount of cooling water supplied to the oil cooler.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the first flow path is communicated with the discharge side flow path of the pump chamber, and the second flow path is connected with the suction side flow path of the pump chamber. The gist is that the channel is in communication.

  According to this configuration, the cooling water is pumped from the pump chamber toward the oil cooler, while the cooling water discharged from the oil cooler is sucked into the pump chamber. Can be suitably increased.

  According to a fifth aspect of the present invention, an oil cooler including a cooling water inlet and a cooling water outlet is attached to the water inlet housing according to any one of the first to fourth aspects, and the cooling water inlet and the first The gist is that one flow path communicates with an external pipe.

  According to this configuration, as described above, since the temperature rise of the cooling water supplied from the water inlet housing to the oil cooler can be suitably suppressed, the cooling efficiency of the oil cooler can be increased.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment embodying a water inlet housing and a water inlet housing with an oil cooler according to the present invention will be described with reference to FIGS.

  FIG. 1 shows a state in which a water inlet housing 20 (hereinafter referred to as a housing 20) in the present embodiment is fixed to a cylinder block 10 constituting an engine body of a water-cooled internal combustion engine.

  As shown in FIG. 1, the housing 20 is fixed to the outer wall of a cylinder block 10 (shown on the right side of the figure). A water-cooled oil cooler 40 that cools engine oil using cooling water of the internal combustion engine is attached to the housing 20. The housing 20 is provided with a cooling water inlet 25a (shown on the left side of the oil cooler 40 in the figure), and the cooling water inlet 25a is connected to the radiator 50 via a cooling pipe 110. .

  The cylinder block 10 includes a water jacket (not shown) through which engine cooling water flows, a supply path 21 for supplying cooling water from the housing 20 to the water jacket, and an outlet (not shown) for taking out the cooling water from the water jacket. ) Etc. are formed. The cylinder block 10 has an oil passage 23 for introducing engine oil from the outside of the cylinder block 10 toward the main gallery formed inside the cylinder block 10, and the oil is supplied to the cylinder block 10. A take-out oil passage 24 that is taken out from the inside toward the outside is also formed.

  The engine cooling water cooled by the radiator 50 is introduced into the housing 20 through the cooling pipe 110. The cooling water introduced into the housing 20 is supplied to the water jacket via the supply path 21 provided in the cylinder block 10. The cooling water supplied to the water jacket cools each part of the engine, then is taken out from the take-out port, and is sent to the radiator 50 through the cooling pipe 100.

  The oil taken out from the cylinder block 10 through the take-out oil passage 24 is cooled by the oil cooler 40 through the oil passage formed in the housing 20. Then, the oil cooled by the oil cooler 40 is introduced into the introduction oil passage 23 through an oil passage formed in the housing 20 and then sent to the main gallery.

Next, the detailed structure of the housing 20 will be described with reference to FIGS.
FIG. 2 shows the structure of the housing 20 viewed from the direction of the arrow D shown in FIG. 1, in other words, the structure of the housing 20 on the fixed surface side with the cylinder block 10. 3 and 4 show the structure of the housing 20 as viewed from the direction of arrow E shown in FIG. 2. In particular, FIG. 3 shows the structure of the housing 20 in a state where the water pump is assembled. These each show the structure of the housing 20 before a water pump is assembled | attached. 5 is a sectional view taken along the line AA shown in FIG. 2, FIG. 6 is a sectional view taken along the line BB shown in FIG. 1, and FIG. 7 is a sectional view taken along the line CC shown in FIG. Each of the cross-sectional views is shown.

  As shown in FIG. 2, the oil cooler 40 is fixed to the housing 20 via a bracket 70. In the present embodiment, the bracket 70 and the housing 20 are provided separately, but may be integrally formed.

  A water pump 30 is provided on a side surface of the housing 20 (right side surface in FIG. 2). The water pump 30 is drivingly connected to the crankshaft of the internal combustion engine via a pulley and a belt, and is driven by the rotation of the crankshaft. Incidentally, not only a mechanical water pump driven by rotation of a crankshaft but also an electric water pump may be used.

  As shown in FIG. 3, the water pump 30 includes a pulley 30a around which the belt is wound, an impeller that rotates integrally with the pulley 30a, and the pulley 30a is rotatably supported by a pump cover 30b. ing.

  As shown in FIG. 4, in the housing 20, a circular pump chamber 31 in which the impeller is accommodated is formed on the side where the water pump 30 is attached. A cooling water suction passage 25 connected to the cooling water inlet 25a is formed. A cooling water discharge passage 32 through which the cooling water sucked into the pump chamber 31 is discharged is formed in the outer periphery of the pump chamber 31 in the housing 20. The cooling water discharge passage 32 extends from the pump chamber 31 in the radial direction of the pump chamber 31, and then proceeds in the inner direction of the housing 20 (see FIG. 5). Finally, FIG. The cooling water outlet 32a shown in FIG. The cooling water outlet 32 a is connected to the supply path 21 of the cylinder block 10.

  In the housing 20 configured in this manner, the cooling water cooled by the radiator 50 is sucked from the cooling water inlet 25 a and introduced into the pump chamber 31 through the cooling water suction passage 25. The cooling water discharged from the pump chamber 31 is discharged from the cooling water outlet 32a through the cooling water discharge passage 32. The cooling water discharged from the cooling water outlet 32 a is introduced into the water jacket of the cylinder block 10 through the supply path 21. As described above, in the present embodiment, the cooling water passage is formed by the cooling water suction passage 25, the pump chamber 31, and the cooling water discharge passage 32 formed in the housing 20. In the present embodiment, the cooling water suction passage 25 constitutes the suction side flow path of the pump chamber. The cooling water discharge passage 32 forms the discharge side flow path of the pump chamber.

Next, the oil passage provided in the housing 20 will be described.
As shown in FIG. 2, an oil inlet 27 a that introduces oil into the housing 20 and an oil outlet 28 a that discharges oil from the housing 20 are formed below the housing 20. The oil inlet 27 a is connected to the take-out oil passage 24 of the cylinder block 10, and the oil outlet 28 a is connected to the introduction oil passage 23 of the cylinder block 10.

  As shown in FIG. 6, a first introduction oil passage 27 and a first discharge oil passage 28 are arranged in parallel inside the housing 20, and the bracket 70 is communicated with the first introduction oil passage 27. The second introduction oil passage 57 and the second discharge oil passage 58 communicating with the first discharge oil passage 28 are arranged in parallel.

  One end portion of both ends of the first introduction oil passage 27 is in communication with the oil inlet 27 a, and the other end portion of both ends thereof is in communication with the second introduction oil passage 57. The second introduction oil passage 57 is in communication with an oil discharge portion 57b connected to the oil inlet of the oil cooler 40.

  One end portion of both ends of the first discharge oil passage 28 is communicated with the oil outlet 28 a, and the other end portion of both ends thereof is communicated with the second discharge oil passage 58. The second drain oil passage 58 communicates with an oil intake port 58b connected to the oil outlet of the oil cooler 40.

  In the housing 20 configured in this way, oil is introduced from an oil inlet 27a connected to the take-out oil passage 24 of the cylinder block 10, and the introduced oil is supplied to the first introduction oil passage 27 and the second introduction oil passage 57. And the oil cooler 40 through the oil discharge part 57b. The oil cooled by the oil cooler 40 is discharged from the oil outlet 28a through the oil intake port 58b, the second discharge oil passage 58, and the first discharge oil passage 28. The oil discharged from the oil outlet 28a is introduced into the introduction oil passage 23 of the cylinder block 10 and is sent to various parts of the engine.

  By the way, since the housing 20 in the present embodiment is fixed to the engine body such as the cylinder block 10, the temperature of the housing 20 is increased by heat conduction from the internal combustion engine. Therefore, if the entire flow path for supplying the cooling water to the oil cooler 40 is formed inside the housing 20 as described above, the temperature of the cooling water flowing in the supply flow path is compared with that before flowing into the housing 20. It tends to be high. As described above, when the temperature of the cooling water supplied to the oil cooler 40 increases, the temperature difference between the cooling water and the oil decreases, so that the amount of heat transferred from the oil to the cooling water decreases, and as a result, the oil cooler 40 There is a risk that the cooling efficiency of the battery will decrease.

  Therefore, in the housing 20 according to the present embodiment, the flow path for supplying the cooling water to the oil cooler 40 is provided with the structure described below so as to suppress the temperature rise of the cooling water supplied to the oil cooler 40. ing.

  As shown in FIG. 5, a first flow path 80 is communicated with the cooling water discharge passage 32 formed inside the housing 20. One end of both ends of the first flow path 80 is opened to the cooling water discharge passage 32, and the other end of the both ends is in the housing 20 and the cylinder block 10 is fixed. Opened on the side (left side in FIG. 5). A portion of the first flow path 80 that is open on the surface to which the cylinder block 10 is fixed (the left side in FIG. 5) is the end of a hollow external pipe 35 provided outside the housing 20. A certain first connection part 35a is connected. The first flow path 80 is formed substantially perpendicular to the fixed surface of the cylinder block 10 in the housing 20. Thereby, the distance between the part connected to the cooling water discharge passage 32 in the first flow path 80 and the part to which the external pipe 35 is connected, in other words, the flow path length of the first flow path 80 is The first flow path 80 is formed to be as short as possible.

  As shown in FIG. 2, the second connection portion 35b, which is the other end of the external pipe 35, is connected to a cooling water inlet 70a provided in the bracket 70, and this cooling water inlet 70a is The cooling water inlet 40 a of the oil cooler 40 is communicated with the cooling water passage formed in the bracket 70.

  As shown in FIG. 7, the cooling water outlet 40 b of the oil cooler 40 is communicated with a second flow path 90 formed in the housing 20, and the second flow path 90 is connected to the cooling water suction passage 25. It is communicated.

  In the housing 20 configured in this way, a part of the cooling water flowing through the cooling water discharge passage 32 flows into the first flow path 80 and is supplied to the oil cooler 40 via the external pipe 35. The cooling water heat-exchanged by the oil cooler 40 is discharged from the oil cooler 40 and then returned to the cooling water intake passage 25 through the second flow path 90.

According to the present embodiment described above, the following operational effects can be obtained.
(1) The supply flow path for supplying cooling water to the oil cooler 40 is configured by the external pipe 35 and the first flow path 80. Therefore, as compared with the conventional case where the entire supply flow path is formed inside the water inlet housing, in this embodiment, the length of the supply flow path in the housing 20 can be shortened. Accordingly, it is possible to reduce the amount of heat transferred from the housing 20 to the cooling water, whereby it is possible to suitably suppress the temperature rise of the cooling water supplied to the oil cooler 40.

  (2) The external pipe 35 communicating with the cooling water inlet 40 a of the oil cooler 40 is connected to the first flow path 80. Therefore, by appropriately changing the length and shape of the external pipe 35, the formation position of the first flow path 80 can be set relatively freely. In the present embodiment, the flow path of the first flow path 80 is set. The first flow path 80 is formed so that the length is as short as possible. Therefore, the amount of heat received from the housing 20 when the cooling water passes through the first flow path 80 can be suppressed as much as possible, and thus the temperature rise of the cooling water supplied to the oil cooler 40 can be suitably suppressed. become.

  (3) A flow path that communicates with the cooling water suction passage 25 in the housing 20 and that is connected to the cooling water outlet 40 b of the oil cooler 40 is formed inside the housing 20. The cooling water discharged from the oil cooler 40 is returned to the cooling water suction passage 25 through the second flow path 90. Therefore, it is not necessary to form a flow path for returning the cooling water discharged from the oil cooler 40 to the cooling water suction passage 25 by an external pipe, thereby reducing the number of parts, the number of assembly steps, improving the maintainability, etc. It is also possible to plan.

  (4) The first introduction oil passage 27 for introducing oil into the oil cooler 40 and the first discharge oil passage 28 through which the oil discharged from the oil cooler 40 flows are formed inside the housing 20. Also, an oil passage for introducing oil into the oil cooler 40, a second introduction oil passage 57 communicating with the first introduction oil passage 27, and an oil passage through which oil discharged from the oil cooler 40 flows. The second drain oil passage 58 communicating with the first drain oil passage 28 is formed inside the bracket 70. Therefore, it is not necessary to form the first introduction oil passage 27, the first discharge oil passage 28, the second introduction oil passage 57, and the second discharge oil passage 58 with external piping, and the number of parts and assembly man-hours are reduced. It becomes possible to improve the maintainability.

  (5) The pump chamber 31 of the water pump 30 is formed in the housing 20. Therefore, the water pump 30 can be attached to the housing 20. Therefore, compared with the case where the housing 20 and the water pump 30 are provided separately, the length of the cooling water discharge passage 32 between the water pump 30 and the first flow path 80 can be shortened. Therefore, the flow path resistance generated between the water pump 30 and the first flow path 80 can also be reduced. Therefore, it is possible to increase the amount of cooling water supplied to the first flow path 80. When the amount of cooling water supplied to the first flow path 80 increases in this way, the cooling water is supplied to the oil cooler 40 for the reason that the heat receiving time when passing through the first flow path 80 is shortened. The temperature rise of the cooling water can be suppressed. Further, as the amount of cooling water supplied to the oil cooler 40 increases, the cooling efficiency of the oil cooler 40 also increases.

  (6) The first flow path 80 is communicated with the cooling water discharge passage 32 communicated with the pump chamber 31, and the second flow path 90 is communicated with the cooling water suction passage 25 communicated with the pump chamber 31. . Accordingly, the cooling water is pumped from the pump chamber 31 toward the oil cooler 40, while the cooling water discharged from the oil cooler 40 is sucked into the pump chamber 31. Therefore, the circulation amount of the cooling water in the oil cooler 40 can be suitably increased.

  (7) In the water inlet housing with an oil cooler according to the present embodiment, the oil cooler 40 including the cooling water inlet 40 a and the cooling water outlet 40 b is attached to the housing 20, and formed in the cooling water inlet 40 a and the housing 20. The first flow path 80 is communicated with the external pipe 35. In the housing 20 according to the present embodiment, as described above, the length of the flow path formed in the housing 20 among the supply flow paths for supplying the cooling water to the oil cooler 40 is short. Less heat is transferred to the water. Therefore, in the water inlet housing with an oil cooler of the present embodiment, the temperature rise of the cooling water supplied from the housing 20 to the oil cooler 40 can be suitably suppressed, and the cooling efficiency of the oil cooler 40 can be increased. Become.

In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
Although the oil cooler 40 is fixed to the housing 20 through the bracket 70, the oil cooler 40 may be directly fixed to the housing 20 without using the bracket 70. In this case, the second introduction oil passage 57, the oil discharge portion 57b, the second discharge oil passage 58, and the oil intake port 58b may be formed inside the housing 20.

  The first flow path 80 is formed substantially perpendicular to the fixed surface of the cylinder block 10 in the housing 20, but the first flow path 80 may be formed in another manner. . However, in this case as well, the distance between the part of the first flow path 80 that communicates with the cooling water discharge passage 32 and the part to which the external pipe 35 is connected, in other words, the flow path of the first flow path 80. It is desirable to form the first flow path 80 so that the length is as short as possible.

  The housing 20 includes a water pump 30 and an oil cooler 40. In addition, the water inlet housing is provided only with an oil cooler, and the present invention can be similarly applied to a configuration in which the water pump and the water inlet housing are provided separately. Even in this case, the effects described in (1) to (4), (6), and (7) can be obtained.

  The first flow path 80 is communicated with the cooling water discharge passage 32 and the second flow path 90 is communicated with the cooling water suction passage 25. Both the first flow path 80 and the second flow path 90 are The cooling water passage communicated with the discharge side of the water pump 30 may be communicated with. Further, both the first flow path 80 and the second flow path 90 may be communicated with a cooling water passage communicated with the suction side of the water pump 30. Even in this case, the effects described in the above (1) to (5) and (7) can be obtained.

  The first introduction oil passage 27 and the first discharge oil passage 28 are internal pipes formed in the housing 20, and the second introduction oil passage 57 and the second discharge oil passage 58 are internal pipes formed in the bracket 70. I tried to do it. In addition, at least one of the first introduction oil passage 27, the first discharge oil passage 28, the second introduction oil passage 57, and the second discharge oil passage 58 may be configured by an external pipe.

BRIEF DESCRIPTION OF THE DRAWINGS It is one Embodiment which actualized the water inlet housing and the water inlet housing with an oil cooler concerning this invention, Comprising: The external view which shows the structure of the water inlet housing fixed to the cylinder block. The external view which shows the structure of the water inlet housing seen from the arrow D direction shown in FIG. FIG. 3 is an external view showing the structure of the water inlet housing as viewed from the direction of arrow E shown in FIG. 2, with the water pump assembled. FIG. 3 is an external view showing the structure of the water inlet housing as viewed from the direction of arrow E shown in FIG. 2 before the water pump is assembled. Sectional drawing in the AA line shown in FIG. Sectional drawing in the BB line shown in FIG. Sectional drawing in the CC line | wire shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Cylinder block, 20 ... Water inlet housing (housing), 21 ... Supply path, 23 ... Introducing oil path, 24 ... (Cylinder block) taking-out oil path, 25 ... Cooling water intake path, 25a ... Cooling water inlet (of housing) 27 ... first inlet oil passage, 27a ... oil inlet, 28 ... first discharge oil passage, 28a ... oil outlet, 30 ... water pump, 30a ... pulley, 30b ... pump cover, 31 ... Pump chamber, 32 ... cooling water discharge passage, 32a ... cooling water outlet, 35 ... external piping, 35a ... first connecting portion, 35b ... second connecting portion, 40 ... oil cooler, 40a ... (of oil cooler) ) Cooling water inlet, 40b ... Cooling water outlet (of oil cooler), 50 ... Radiator, 57 ... Second introduction oil passage, 57b ... Oil discharge part, 58 ... Second discharge Road, 58b ... oil inlet, 70 ... Bracket, 70a ... (bracket) the cooling water inlet, 80 ... first flow path, 90: second flow path, 100, 110 ... cooling pipes.

Claims (5)

In a water inlet housing fixed to an engine body of a water-cooled internal combustion engine and having a cooling water passage formed therein, to which an oil cooler having a cooling water inlet and a cooling water outlet is attached,
Inside the water inlet housing, a flow path communicating with the cooling water flow path, a first flow path connected to an external pipe communicating with the cooling water inlet of the oil cooler, and the cooling water flow path A water inlet housing, wherein the water inlet housing is formed with a second flow path connected to the cooling water outlet of the oil cooler. The water inlet housing according to claim 1, wherein an oil passage for introducing oil into the oil cooler and an oil passage through which oil discharged from the oil cooler flows are formed inside the water inlet housing. The water inlet housing according to claim 1, wherein a pump chamber of a water pump is formed in the water inlet housing. The water inlet housing according to claim 3, wherein the first flow path is communicated with a discharge-side flow path of the pump chamber, and the second flow path is communicated with a suction-side flow path of the pump chamber. An oil cooler having a cooling water inlet and a cooling water outlet is attached to the water inlet housing according to any one of claims 1 to 4, and the cooling water inlet and the first flow path communicate with each other through an external pipe. A water inlet housing with an oil cooler.

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