JP6454566B2 - Regulatory member - Google Patents

Description

  The present invention relates to a regulating member used by being inserted into a cooling water flow path (water jacket) provided in a cylinder block of an internal combustion engine.

  In the water jacket of the internal combustion engine, a spacer as a regulating member for regulating the flow (flow rate, flow rate, etc.) of the cooling water in the water jacket is inserted from the opening. When inserting the spacer into the water jacket from the opening, it is desired to reduce the insertion load and improve the assemblability. In Patent Documents 1 and 2, before being inserted into the water jacket, it is not in contact with the opposite wall surface of the water jacket, and after insertion, it is deformed or thickened to restrict the flow of cooling water. A spacer is disclosed. Patent Document 1 discloses a regulating member made of a plate-like composite of a first non-water-swelling elastically deformable first member and a second member made of water-swellable elastomer that is integrally fixed to the first member. A water jacket spacer fixed to the spacer body is described. In this water jacket spacer, one side of the complex is fixed, and when inserted into the water jacket, the regulating member does not contact the opposite wall surface of the water jacket, and when the cooling water flows, the second member Is swelled with water and deformed so that the regulating member faces the opposite wall surface, and a part of the flow of the cooling water is regulated. Patent Document 2 describes an overcooling prevention member for a cylinder bore wall that swells when it comes into contact with a cooling water of 70 ° C. or higher and contacts a wall surface of the cylinder bore wall on the cooling water flow path (water jacket) side.

JP 2012-117390 A JP 2014-194219 A

  By the way, in the water jacket spacer described in Patent Document 1, when the second member of the composite that constitutes the regulating member sucks water and swells, it deforms so as to block a part of the cooling water. In this deformed state, the second member is located on the upstream side in the flow direction of the cooling water and is directly exposed to the flow of the cooling water. Therefore, the second member may be excessively deformed due to the pressure of the cooling water. is there. As a result, the function of blocking the cooling water of the regulating member is lowered. Further, in Patent Document 2, a vertical rib is formed by a resin molded support on the side portion of a supercooling prevention member attached to the resin molded support, and the protrusion on the cylinder bore wall side of this vertical rib is supercooled. It is described that the prevention member is prevented from being deformed by the flow of water. However, when the overcooling prevention member swells with water, a part of the overcooling prevention member protrudes from the protruding portion of the vertical rib on the cylinder bore wall side, and this protruding portion is directly exposed to the flow of water, and there is still a fear of deformation. It is thought that.

  The present invention has been made in view of the above, and has excellent insertability into the cooling water flow path, effectively exhibits the flow regulation of the cooling water in the cooling water flow path, and can expand in the width direction of the cooling water flow path. It aims at providing the control member which can suppress the influence of the pressure etc. of the cooling water with respect to a variable body.

  A regulating member according to the present invention is a regulating member that is inserted into a cooling water flow path provided in a cylinder block of an internal combustion engine from an opening thereof and that regulates the flow of cooling water in the cooling water flow path. A base formed in a shape that can be disposed at a predetermined position in the cooling water flow path, a variable body attached to the base body and capable of expanding in a width direction of the cooling water flow path, and attached to the variable body A movable body that is movable in the width direction of the cooling water flow path along with the variable body along with the expansion of the variable body, and the base at a position upstream of the variable body in the flow direction of the cooling water, A projecting portion provided to project in the width direction of the cooling water flow path, and the movable body has a side portion located on the upstream side in the flow direction of the cooling water in the variable body. And

  According to the present invention, since the protrusion is formed on the base in the vicinity of the upstream side in the flow direction of the cooling water from the variable body so as to protrude in the width direction of the cooling water flow path, the protrusion is variable by the protrusion. Direct effects such as the pressure of cooling water on the body can be mitigated. This reduces the concern about deformation of the variable body due to the pressure of the cooling water. In addition, since the variable body can be expanded in the width direction of the cooling water flow path, if the restriction member is inserted from the opening of the cooling water flow path in a state before the variable body is expanded, the restriction member And interference with the opening of the cooling water passage. Therefore, the regulation member is smoothly inserted into the cooling water flow path. Since the variable body expands in the width direction of the cooling water flow path in the cooling water flow path, the circulation of the cooling water in the cooling water flow path is regulated, and the cylinder bore wall is appropriately cooled. In addition, even if the width of the cooling water flow path is different, the variable body expands so that the positional relationship between the movable body and the wall surface of the cooling water flow path can be adjusted. The function which regulates can be effectively exhibited. Furthermore, since the movable body is attached to the variable body so as to move along with the variable body in the width direction of the cooling water flow path, the shape of the variable body is allowed to expand while the shape of the variable body is stable. Can keep. Moreover, the influence of the circulating pressure of the cooling water on the variable body can be more effectively mitigated by the protrusion formed on the base and the side part of the movable body.

In the regulating member according to the present invention, the movable body has a front side portion fixed to a portion of the variable body facing a wall surface of the cooling water flow path, and the side portion is an end portion of the front side portion. It is good also as what is formed so that it may extend to the said variable body in the non-adhering state.
According to the present invention, the influence of the cooling water pressure or the like on the variable body can be more effectively mitigated by the protrusion formed on the base and the side portion of the movable body. In addition, since the side portion is not fixed to the variable body, the expansion of the variable body in the width direction is not hindered by the side portion.

In the regulating member according to the present invention, the protrusions on the base body and the side portions on the movable body may be formed so that at least a part thereof overlaps with the flow direction of the cooling water.
According to the present invention, it is possible to more effectively alleviate the influence such as the circulation pressure of the cooling water on the variable body.

In the regulating member according to the present invention, the protrusion on the base is formed in a rib shape, or formed so as to form a part of a bent portion formed on the base. Also good.
According to these aspects of the present invention, in addition to effectively mitigating the influence of the circulating pressure of the cooling water on the variable body, the effect of reinforcing the base is also increased.

In the regulating member according to the present invention, the variable body is capable of holding itself in a state where at least a part thereof is compressed, and expands at least in the width direction of the cooling water flow path in response to moisture or heat. It is good also as what is comprised by.
According to the present invention, when the regulating member is arranged in the cooling water flow path, if the variable body is in a compressed state, the variable body and the movable body can be prevented from interfering with the wall surface of the cooling water flow path. The attachment is improved. And after arrange | positioning a variable body in a cooling water flow path, it reacts with a water | moisture content or a heat | fever, it becomes enormous, and the effect which regulates distribution | circulation of cooling water with a movable body is exhibited.

In the regulating member according to the present invention, the variable body may be made of a cellulosic sponge that can recover from a compressed state in response to cooling water.
When cellulosic sponges are dried in a compressed state, the cellulose molecules are hydrogen-bonded and maintained in a compressed state, while when exposed to moisture from this state, the water molecules dissociate and compress the hydrogen bonds between the cellulose molecules. It has the property of restoring from the state. According to the present invention, since the cellulosic sponge having such characteristics is used as the variable body, the variable body can be maintained in a compressed state without using a binder solution or an emulsion, and the variable body is compressed. The process for making a state can be simplified. In addition, there is little concern about adverse effects on cooling water and the environment.

In the regulating member according to the present invention, the variable body in the compressed state may be configured such that the movable body does not interfere with a wall surface of the cooling water channel when inserted into the cooling water channel.
According to the present invention, when the restriction member is inserted from the opening of the cooling water flow path, it can be prevented from receiving interference and a load due to the opening edge of the movable body, and the insertion is made smoothly.

In the regulating member according to the present invention, the variable body may be formed of an elastic body that can reversibly expand and contract in the width direction of the cooling water flow path.
According to the present invention, for example, even when the regulation member arranged in the cooling water flow path is taken out of the cooling water flow path and then placed again in the cooling water flow path for maintenance of the internal combustion engine or the like. The body can perform its function.

In the regulating member according to the present invention, the movable body includes an abutting portion that abuts against an opposing wall surface of the cooling water flow path with the elasticity of the elastic body, and a depth direction bottom side of the cooling water flow path in the movable body. The end portion does not interfere with the opening of the cooling water flow path in the non-compressed state of the elastic body, and the end portion on the bottom side in the depth direction of the contact portion is directed to the bottom side and the base side. It may be an inclined shape.
According to the present invention, even when the regulating member is inserted into the cooling water flow path without compressing the elastic body as the variable body, the bottom end in the depth direction of the movable body is the opening edge of the cooling water flow path. It is suppressed from being caught by the opening, and the insertion from the opening is made smoothly. In addition, since the bottom side end of the contact part is inclined as described above, the inclined bottom side end serves as a guide part, and the contact part is an opening edge of the cooling water flow path. The restriction member is smoothly inserted from the opening without being caught by the opening.

  According to the regulating member according to the present invention, the insertion into the cooling water channel is excellent, the circulation regulation of the cooling water in the cooling water channel is effectively exhibited, and the cooling water channel can be expanded in the width direction. The influence of the pressure of the cooling water on the variable body can be suppressed.

It is a schematic plan view which shows the state which inserted the control member which concerns on this invention in the water jacket of the cylinder block in an internal combustion engine. It is 1st embodiment of the control member which concerns on this invention, Comprising: It is a typical expanded transverse plan view of the X section in FIG. (A) and (b) show the 1st modification of the embodiment, (a) shows the state which arranged the regulation member in a water jacket, (b) expanded the variable body of the regulation member. It is a typical cross-sectional top view which shows a state, respectively. (A) (b) is a figure similar to FIG. 3 (a) (b) which shows the 2nd modification of the embodiment. (A) (b) is a figure similar to Fig.3 (a) (b) which shows the 3rd modification of the embodiment. (A) (b) is a figure similar to FIG. 3 (a) (b) which shows 2nd embodiment of the control member based on this invention. (A) (b) is a figure similar to Fig.6 (a) (b) which shows the 1st modification of the embodiment. (A) (b) is a figure similar to Fig.6 (a) (b) which shows the 2nd modification of the embodiment. (A) (b) is a figure similar to Fig.6 (a) (b) which shows the 3rd modification of the embodiment. It is a typical cross-sectional top view corresponding to the X section of FIG. 1 which shows 3rd embodiment of the control member which concerns on this invention. It is the same figure as FIG. 10 which shows the 1st modification of the embodiment. 10A shows a state when the regulating member of the embodiment is inserted into the water jacket, and FIG. 10B shows a state where the regulating member is arranged at a predetermined position in the water jacket. It is typical sectional drawing corresponding to an arrow part.

  Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 show a first embodiment of a regulating member according to the present invention, and FIG. 1 shows the regulating member of the embodiment as a water jacket (cooling water flow path) 3 of a cylinder block 1 in an automobile internal combustion engine 10. The inserted state is shown. A cylinder block 1 shown in FIG. 1 constitutes a three-cylinder automobile engine (internal combustion engine), and is provided so that three cylinder bores 2 are connected in series in an adjacent state. 1a... Is a bolt (not shown) insertion hole for fastening a cylinder head (not shown) to the cylinder block 1 together. An open deck type water jacket 3 is formed in series around the three cylinder bores 2. The cylinder block 1 is provided with a cooling water (including antifreeze) introduction port 1 b and a cooling water discharge port 1 c that communicate with the water jacket 3. The cooling water discharge port 1c is connected to a radiator (not shown) by piping, and the outlet side of the radiator is connected to the cooling water inlet 1b via a water pump (not shown). Thus, the cooling water is configured to circulate between the water jacket 3 and the radiator. When a water jacket (not shown) is also provided in the cylinder head, the water jacket 3 of the cylinder block 1 and the water jacket of the cylinder head are configured to communicate with each other. In this case, the cylinder block 1 may not have the cooling water discharge port 1c, and the cylinder head is provided with a cooling water discharge port, to which a pipe leading to the radiator is connected. A rectifying member (not shown) is disposed in the vicinity of the cooling water inlet 1b in the water jacket 3, and the cooling water introduced from the cooling water inlet 1b is guided to flow in the direction indicated by the arrow a, It is comprised so that it may discharge from the cooling water discharge port 1c. Hereinafter, the arrow a is referred to as the flow direction of the cooling water.

  In the water jacket 3 between adjacent cylinder bores 2, 2, constricted portions 3 a. The groove width of the constricted part 3a is made larger than the groove width of the other arc part 3b of the water jacket 3. The side wall surface of the water jacket 3 having a concave groove shape is constituted by both inner wall surfaces 3c and 3d of an inner wall surface 3c on the cylinder bore 2 side and an inner wall surface 3d on the opposite side of the cylinder bore 2. The restricting member 4 according to the present embodiment is arranged to be inserted into the water jacket 3 through the opening 30 thereof, and is configured to restrict the flow of the cooling water in the water jacket 3. In the illustrated example, five regulating members 4 are arranged in the water jacket 3. Each regulating member 4 includes a base body 5, a variable body 6 attached to the base body 5, a movable body 7 attached to the variable body 6, and a protrusion 50 provided on the base body 5. The base 5 is formed in a shape that can be placed at a predetermined position (five places in the illustrated example) by positioning means (not shown) with the water jacket 3. Specifically, the base 5 is formed in a circular arc shape along the circular arc portion 3 b of the water jacket 3 and has a width smaller than the width of the water jacket 3. The base 5 has rigidity, and is made of a hard synthetic resin molded body in the illustrated example. The protrusion 50 is formed in a rib shape, and is provided on the base body 5 at a position upstream of the attachment portion 60 described later of the variable body 6 in the coolant flow direction a. The protrusion 50 is integrally formed so as to protrude in the width direction b of the water jacket 3.

  The variable body 6 can be expanded in the width direction b of the water jacket 3 from at least the attachment portion 60 to the base body 5. The variable body 6 of the present embodiment is capable of holding itself in a state where at least a part thereof is compressed, and is configured by a foam material that expands at least in the width direction b of the water jacket 3 in response to moisture or heat. Yes. Specifically, the variable body 6 shown in FIG. 2 is made of a cellulosic sponge that can be restored from a compressed state by contact with cooling water. Cellulose sponge is a natural material composed of cellulose derived from pulp and natural fibers added as reinforcing fibers. Cellulose-based sponge is a porous material. When the cellulosic sponge is dried in a pressurized state, hydrogen bonds between the cellulose molecules are maintained in a compressed state, while when exposed to cooling water from this state, the water molecules dissociate the hydrogen bonds between the cellulose molecules. To restore from the compressed state. Such a variable body 6 can be obtained by compressing a foamed cellulosic sponge raw material available in the market in the thickness direction and drying it to form a sheet-like body. The variable body 6 is attached by being fixed to one surface (surface on the cylinder bore 2 side) of the base body 5 in a compressed state. As the foam material constituting the variable body 6, the following materials can be used in addition to the cellulosic sponge. That is, the foamed rubber is fixed in a compressed state with a water-soluble binder, and the foamed material is configured such that the binder is melted with cooling water and returned to an uncompressed state, or the foamed rubber is fixed in a compressed state with a thermoplastic binder. The foamed material is configured such that the binder is softened or melted depending on the temperature of the cooling water to return to an uncompressed state.

  The movable body 7 can move in the width direction b of the water jacket 3 together with the variable body 6 as the variable body 6 expands. The movable body 7 is formed of a resin molded body that is more rigid than the variable body 6. The movable body 7 includes a front side portion 71 fixed to a portion (hereinafter referred to as a front surface portion) 61 facing the inner wall surface 3c of the water jacket 3 in the variable body 6, and a cooling water flow direction a in the variable body 6. And a side portion 72 positioned along the upstream side portion 62. The side part 72 is formed so as to extend substantially parallel to the side part 62 of the variable body 6 from the upstream side end part 71 a in the cooling water flow direction a of the front side part 71 in a non-fixed state. In other words, the side part 72 is formed so as to extend substantially perpendicular to the front side part 71. In the illustrated example, the side portion 72 is provided at a position near the upstream side in the cooling water flow direction a from the side portion 62 of the variable body 6. The side portion 72 is provided in the vicinity of the base body 5 in the width direction b of the water jacket 3 and spaced from the base body 5 on the cylinder bore 2 side. And the protrusion 50 of the base | substrate 5 and the side part 72 of the variable body 6 are formed so that at least one part may overlap and adjoin to the flow direction a of a cooling water.

  The restriction member 4 configured as described above is inserted into the water jacket 3 through the opening 30 and disposed at a predetermined position. At the time of this insertion, since the variable body 6 is in a compressed state, the variable body 6 can be smoothly inserted without interfering with the edge of the opening 30. Further, since there is no interference, the variable body 6 is hardly damaged. When cooling water is introduced into the water jacket 3 from the cooling water inlet 1b, the cellulose sponge constituting the variable body 6 is exposed to the cooling water, and the water molecules dissociate hydrogen bonds between the cellulose molecules. Restore from the compressed state. Due to the restoration from the compressed state, the variable body 6 expands toward the inner wall surface 3 c along the width direction b of the water jacket 3. As the variable body 6 expands, the movable body 7 also moves toward the inner wall surface 3c, and the expanded front surface portion 61 of the variable body 6 and the front side portion 71 of the movable body 7 contact the inner wall surface 3c on the cylinder bore 2 side. Touch. In FIG. 2, the variable body 6 and the movable body 7 indicated by a solid line indicate the state before the variable body 6 is expanded, and the variable body 6 and the movable body 7 indicated by a two-dot chain line are a state in which the variable body 6 is expanded. Is shown. Since the side portion 72 of the movable body 7 is not fixed to the variable body 6, the expansion of the variable body 6 in the width direction b is not hindered by the side portion 72. Even in the state in which the variable body 6 is expanded, the protrusion 50 of the base body 5 and the side portion 72 of the movable body 7 are partially overlapped in the coolant flow direction a (the circumferential direction of the base body 5). It is configured.

  In the regulating member 4 arranged in the water jacket 3 in this way, the variable body 6 expands with the circulation of the cooling water and comes into contact with the inner wall surface 3c of the water jacket 3, so that the circulation of the cooling water is regulated. Thus, cooling of the inner wall surface 3c and prevention of overcooling are appropriately performed. Since the protrusion 50 of the base body 5 and the side portion 72 of the movable body 7 exist in the vicinity of the upstream side in the flow direction a with respect to the variable body 6, cooling water for the variable body 6 is present. It is possible to alleviate the direct influences such as the distribution pressure. Cellulose-based sponges are insufficient for blocking the flow of water by the material itself, but the deformation of the variable body 6 due to the pressure of the cooling water, etc. is reduced by reducing the influence of the circulation pressure of the cooling water, etc. Is effectively prevented, and the effect of regulating the circulation of the cooling water is exhibited. Further, the variable body 6 expands after the restricting member 4 is disposed on the water jacket 3. Therefore, even if the width of the water jacket 3 is different, the expansion state of the variable body 6 also changes according to the width of the water jacket 3, so that the positional relationship between the movable body 7 and the inner wall surface 3 c of the water jacket 3 can be adjusted. And the function of regulating the circulation of the cooling water by the movable body 7 can be effectively exhibited. Furthermore, since the movable body 7 is attached to the variable body 6 so as to be movable in the width direction of the water jacket 3 along with the variable body 6 as the variable body 6 expands, the shape of the variable body 6 is allowed while allowing the variable body 6 to expand. Can maintain stability.

  3 to 5 show modifications of the first embodiment. In the example shown in FIGS. 3A and 3B, the movable body 7 includes only the side portion 72. In this case, the side part 72 is fixed to the side part 62 of the variable body 6. Further, the protruding portion 50 and the side portion 72 of the base body 5 are configured such that a part thereof overlaps the flow direction a of the cooling water before and after the expansion of the variable body 6, as in the above example. Yes. Also in the restricting member 4 of this example, when the cooling water flows in the water jacket 3 in a state of being arranged in the water jacket 3, the variable body 6 expands in the width direction b. With this expansion, a part of the front surface portion 61 and the movable body 7 (side edge portion 72) facing the inner wall surface 3c of the variable body 6 abuts on the inner wall surface 3c on the cylinder bore 2 side. FIG. 3B shows a state where the variable body 6 is expanded in this way. Therefore, the regulating member 4 of this example also has the same operation and effect as the regulating member 4 of the example shown in FIG.

  In the example shown in FIGS. 4A and 4B, the movable body 7 includes the front side portion 71 and the side side portion 72 as in the example shown in FIG. 2, but the front side portion 71 is the front surface of the variable body 6. The portion 61 is fixed so as to fit into a step portion 61a formed at an upstream corner portion in the flow direction a. And the front part 61 of the variable body 6 and the front side part 71 of the movable body 7 are comprised so that it may become the same surface. Further, the side portion 72 of the movable body 7 is formed so as to contact the side portion 62 of the variable body 6 in a non-fixed state. Further, the protruding portion 50 and the side portion 72 of the base body 5 are configured such that a part thereof overlaps the flow direction a of the cooling water before and after the expansion of the variable body 6, as in the above example. Yes. Also in the restricting member 4 of this example, when the cooling water flows in the water jacket 3 in a state of being arranged in the water jacket 3, the variable body 6 expands in the width direction b. Along with this expansion, the front surface portion 61 facing the inner wall surface 3c of the variable body 6 and the front side portion 71 of the movable body 7 come into contact with the inner wall surface 3c on the cylinder bore 2 side. FIG. 4B shows a state where the variable body 6 has expanded in this way. Therefore, the regulating member 4 of this example also has the same operation and effect as the regulating member 4 of the example shown in FIG.

  In the example shown in FIGS. 5A and 5B, the base 5 has two protrusions 50, 50, and the variable body 6 is placed on the base 5 so as to be positioned between the two protrusions 50, 50. Installed. As in the example shown in FIG. 4, the movable body 7 includes a front side portion 71 and a side side portion 72, and two movable bodies 7 are provided so as to be almost symmetrical at both corners of the front surface portion 61 of the variable body 6. ing. The two movable bodies 7 are fixed so that the front side portions 71 and 71 are fitted to the step portions 61 a and 61 b formed at the upstream and downstream end corners in the flow direction a of the front surface portion 61 of the variable body 6. In addition, the front surface portion 61 of the variable body 6 and the front side portions 71 of both movable bodies 7 are configured to be on the same plane. And each side part 72, 72 of the two movable bodies 7 is formed so as to contact the upstream side and downstream side parts 62, 63 in the flow direction a of the variable body 6 in a non-fixed state, and Each of the two protrusions 50 and 50 is configured such that a part thereof overlaps the flow direction a of the cooling water before and after the expansion of the variable body 6. The cooling water is usually set to flow along the direction a. However, a part of the cooling water flows in the direction opposite to the direction a when the temperature of the cooling water changes or the water pump (not shown) is turned on / off. There is. In such a case, the pressure on the variable body 6 by the cooling water flowing in the direction opposite to the direction a is caused by the protrusion 50 provided on the downstream side of the flow direction a in the variable body 6 and the side portion 72 of the movable body 7. The deformation of the downstream portion of the variable body 6 in the flow direction a is also prevented. Also in the restricting member 4 of this example, when the cooling water flows in the water jacket 3 in a state of being arranged in the water jacket 3, the variable body 6 expands in the width direction b. Along with this expansion, the front surface portion 61 facing the inner wall surface 3c of the variable body 6 and the front side portion 71 of the movable body 7 come into contact with the inner wall surface 3c on the cylinder bore 2 side. FIG. 5B shows a state where the variable body 6 has expanded in this way. Therefore, the regulating member 4 of this example also has the same operation and effect as the regulating member 4 of the example shown in FIG.

6 and 7 to 9 show a second embodiment of the restricting member according to the present invention and its modification. In the present embodiment, the protrusion 50 in the base body 5 is characterized by being formed so as to form a part of the bent portion 500 formed in the base body 5.
In the example shown in FIGS. 6A and 6B and FIGS. 7A and 7B, the upstream portion of the base 5 in the flow direction a is bent in an L shape toward the inner wall surface 3c. A portion of the bent portion 500 facing the radial direction of the cylinder bore 2 is a protrusion 50. 6 (a) and 6 (b), the movable body 7 similar to the example shown in FIG. 3 is provided on the surface on the cylinder bore 2 side of the downstream portion of the base 5 in the flow direction a from the bent portion 500. The variable body 6 is fixed. 7 (a) and 7 (b), the variable body 7 is provided with a movable body 7 similar to the example shown in FIG. 4 on the surface on the cylinder bore 2 side of the downstream portion of the base 5 in the flow direction a from the bent portion 500. The body 6 is fixed. In these examples, the amount of cooling water reaching the variable body 6 is different from the example shown in FIG. 3 and FIG. The effect | action and effect of the protrusion 50 and the movable body 7 with respect to the cooling water to reach are exhibited like the case of the example shown in FIG.3 and FIG.4. Therefore, parts common to the examples shown in FIGS. 3 and 4 are denoted by the same reference numerals, and descriptions of their operations and effects are omitted.

  8 (a) and 8 (b), the upstream portion and the downstream portion in the flow direction a of the base body 5 are bent in an L shape toward the inner wall surface 3c, and the space between the two bent portions 500, 500 is obtained. The portion is a concave portion 501 that is recessed toward the inner wall surface 3d. And the part which faces the radial direction of the cylinder bore 2 in these two bending parts 500 and 500 is made into the protrusions 50 and 50. As shown in FIG. A variable body 6 having two movable bodies 7 similar to the example shown in FIG. 5 is attached to the surface of the concave portion 501 on the inner wall surface 3c side. In this example, two bent portions 500 and 500 including a protrusion 50 are formed on the base 5. In this example, the amount of the cooling water reaching the variable body 6 from the upstream side or the downstream side is different from the example shown in FIG. The actions and effects of the side portions 72, 72 are exhibited in the same manner as in the example shown in FIG. Since the other configuration is the same as that of the example shown in FIG. 5, common portions are denoted by the same reference numerals, and descriptions of operations and effects thereof are omitted.

  9 (a) and 9 (b), the upstream portion and the downstream portion of the base body 5 in the flow direction a are bent in an L shape toward the inner wall surface 3d, and the space between the two bent portions 500, 500 is obtained. The portion is a convex portion 502 protruding to the inner wall surface 3c side. And the part which faces the radial direction of the cylinder bore 2 in these two bending parts 500 and 500 is made into the protrusions 50 and 50. As shown in FIG. The variable body 6 is attached to the surface of the convex portion 502 on the inner wall surface 3c side. The movable body 7 includes one front side 71 and two side parts 72 and 72 formed integrally at both ends of the front side 71. The movable body 7 is formed in a concave shape so as to cover the variable body 6 and the convex portion 502 of the base body 5. The front side 71 of the movable body 7 is fixed to the entire front surface 61 of the variable body 6. Both side portions 72, 72 of the movable body 7 are in non-contact (non-adhering) state with the upstream and downstream side portions 62, 63 in the flow direction a of the variable body 6, and the protrusions 50, 50 and before the expansion of the variable body 6 and after the expansion, a part thereof is configured to overlap in the flow direction a. In this example, the two bent portions 500 and 500 including the protrusion 50 are formed on the base body 5, so that the amount of cooling water from the upstream side or the downstream side to the variable body 6 is as shown in FIG. Although different, the action and effect of the protrusions 50 and 50 and the side portions 72 and 72 of the movable body 7 with respect to the cooling water reaching the variable body 6 are exhibited as in the case of the example shown in FIG. Since the other configuration is the same as that of the example shown in FIG. 5, common portions are denoted by the same reference numerals, and descriptions of operations and effects thereof are omitted.

10 and 11 show a third embodiment of the regulating member according to the present invention and its modification. The present embodiment is characterized in that the variable body 6 is constituted by an elastic body that can reversibly expand and contract in the width direction b of the water jacket 3. As such an elastic body, an elastomer or the like is employed in addition to the compression spring as shown in the figure.
In the example shown in FIG. 10, a single protrusion 50 is formed on the base 5 in the same manner as in the examples shown in FIGS. 2 to 4, and the base 5 on the downstream side in the flow direction a of the protrusion 50 is formed of a compression spring. A variable body 6 is attached. At least two compression springs as the variable body 6 are attached in the depth direction of the water jacket 3 (see FIG. 12). The movable body 7 is fixed to a portion (hereinafter referred to as a tip portion) 64 of the variable body 6 that faces the inner wall surface 3c of the water jacket 3. The movable body 7 includes a front side portion 71 and a side portion 72, and the front side portion 71 is fixed to the tip end portion 64 of the variable body 6, but the side portion 72 is not fixed to the variable body 6. Has been.

  The restricting member 4 of the present embodiment is also inserted and arranged in the water jacket 3 from the opening 30 as in the above example. This insertion is performed in a state where the variable body 6 made of a compression spring is compressed. A two-dot chain line portion of the movable body 7 in FIG. 10 shows a state before the variable body 6 is compressed. When the compression is released after the regulating member 4 is placed at a predetermined position, the variable body 6 expands so as to expand, and the front side 71 of the movable body 7 is elastically applied to the inner wall surface 3c of the water jacket 3. Abut. In this state, a part of the protrusion 50 of the base body 5 and the side part 72 of the movable body 7 overlap with each other in the flow direction a of the cooling water, whereby the flow regulation of the cooling water is appropriately performed. Further, due to the overlap between the protrusion 50 and the side portion 72, the variable body 6 is not directly affected by the circulation pressure of the cooling water, and the movable body 7 is stably brought into contact with the inner wall surface 3c. . In addition, since the variable body 6 can be reversibly expanded and contracted, even when the regulation member 4 disposed on the water jacket 3 is taken out and disposed again on the water jacket 3 for maintenance or the like, The variable body 6 can exhibit its function.

  In the example shown in FIG. 11, two protrusions 50, 50 are provided on the base body 5 with an interval in the flow direction, and a portion between the two protrusions 50, 50 is 2 ( A plurality of variable bodies (compression springs) 6 and 6 are attached at intervals. Also in this example, each compression spring as the variable body 6 is attached to at least two (pieces) in the depth direction of the water jacket 3 (see FIG. 12). A movable body 71 is fixed to the tip portions 64 and 64 of the variable bodies 6 and 6. The movable body 71 is composed of one front side 71 and two side parts 72 and 72 integrally formed at both ends of the front side 71, and the front side 71 is the variable body 6, 6. Are fixed to the front end portions 64 and 64. Both side portions 72 and 72 are formed so as to be close to each other between the two protrusions 50 and 50 and partially overlap the both protrusions 50 and 50 in the flow direction a.

  The restricting member 4 of the present embodiment is also inserted and arranged in the water jacket 3 from the opening 30 as in the above example. This insertion is performed in a state where the variable body 6 made of a compression spring is compressed. A two-dot chain line portion of the movable body 7 in FIG. 11 shows a state before the variable body 6 is compressed. When the compression is released after the regulating member 4 is placed at a predetermined position, the variable body 6 expands so as to expand, and the front side 71 of the movable body 7 is elastically applied to the inner wall surface 3c of the water jacket 3. Abut. In this state, a part of the protrusion 50 of the base body 5 and the side part 72 of the movable body 7 overlap with each other in the flow direction a of the cooling water, whereby the flow regulation of the cooling water is appropriately performed. Further, due to the overlap between the protrusion 50 and the side portion 72, the variable body 6 is not directly affected by the circulation pressure of the cooling water, and the movable body 7 is stably brought into contact with the inner wall surface 3c. . Also, the regulating member 4 of this example can exert its function even when it is taken out from the water jacket 3 and placed in the water jacket 3 again for maintenance or the like.

  FIGS. 12A and 12B schematically show a process of inserting the regulating member 4 of the embodiment into the water jacket 3. In the above description of the present embodiment, when the restriction member 4 is inserted into the water jacket 3, the variable body 6 is compressed before insertion. FIG. 12 shows an example in which the regulating member 4 can be smoothly inserted into the water jacket 3 without compressing the variable body 6. In other words, in this example, the movable body 7 includes an abutting portion 70 that abuts against the opposed inner wall surface 3 c of the water jacket 3 with the elasticity of the variable body (compression spring) 6. Further, the depth direction bottom side end portion 700 of the water jacket 3 in the movable body 7 is configured not to interfere with the opening (opening edge) 30 of the water jacket 3 when the variable body 6 is not compressed. That is, the total width dimension d1 along the width direction b of the base body 5 corresponding to the depth direction bottom end 700 of the movable body 7 in the uncompressed state of the variable body 6 is the width dimension d of the opening 30. It is said to be smaller. Furthermore, the depth direction bottom portion side end portion 70 a of the contact portion 70 has a shape inclined toward the depth direction bottom portion side of the water jacket 3 and toward the base body 5 side. An inclination angle α with respect to the inner wall surface 3c of the depth direction bottom side end portion 70a of the contact portion 70 is set to be smaller than 60 °. The illustrated water jacket 3 is formed such that both inner wall surfaces 3c and 3d are tapered so that the groove width becomes narrower toward the bottom side than the opening 30. Therefore, the base body 5 and the movable body 7 of the regulating member 4 are also configured such that the outer surface in the width direction b follows the tapered shape of the inner wall surfaces 3c and 3d.

  The restriction member 4 having the structure shown in FIG. 12 is also inserted and arranged in the water jacket 3 from the opening 30 as in the above example. FIG. 12A shows an initial state of insertion of the regulating member 4. At this time, the regulating member 4 is inserted without compressing the variable body 6, but the bottom end 700 in the depth direction of the movable body 7 interferes with the opening (opening edge) 30 of the water jacket 3. The restricting member 4 is smoothly inserted without any problem. When the insertion of the regulating member 4 is continued, the contact portion 70 of the movable body 7 is elastically slidably contacted with the inner wall surface 3c, and the variable body 6 is compressed by the action of the tapered inner wall surface 3c with respect to the contact portion 70. The regulating member 4 is arranged at a predetermined position. In this arrangement state, as shown in FIG. 12 (b), the regulating member 4 is stationary with the variable body 6 compressed and the contact portion 70 of the movable body 7 elastically contacting the inner wall surface 3c. The In the initial stage of insertion, the regulating member 4 may be slightly displaced toward the cylinder bore 2, and the bottom side end portion 70 a of the contact portion 70 may hit the opening (opening edge) 30. In this case, the bottom side end 70a is not caught by the opening (opening edge) 30 of the water jacket 3 by the guide action of the inclined bottom side end 70a, and the regulation member 4 is inserted from the opening 30. Is made smooth. Incidentally, when the inclination angle α is larger than 60 °, the guide function is not sufficiently exhibited, the bottom side end portion 70a of the contact portion 70 is caught by the opening 30 of the water jacket 3, and the insertability of the regulating member 4 is increased. Tends to get worse.

  In addition, the arrangement position and the number of the regulating members 4 arranged in the water jacket 3 are not limited to the example shown in FIG. In the above embodiment, the example in which the plurality of regulating members 4 are arranged at predetermined positions in the water jacket 3 has been described. However, the regulating member 4 has a cylindrical shape along the entire circumference of the water jacket 3. It may be an eggplant. Furthermore, although the three-cylinder engine has been exemplified as the internal combustion engine to which the regulating member of the present invention is applied, the present invention is not limited to this and can be applied to an engine having other cylinder numbers.

  The cellulosic sponge is exemplified as a desirable foaming material employed for the variable body 6, but various types of cellulosic sponge may be used. For example, a fine product having a very small bubble size, a small product having a small bubble size, or a medium product having a moderate bubble size may be used. The size of these bubbles is determined by the particle size of the crystalline graphite used in the process of producing the cellulosic sponge. The cellulose sponge is not limited to those composed of cellulose and reinforcing fibers, and may be composed of cellulose alone. The cellulose sponge is selected from any of sponges made of cellulose itself, cellulose derivatives such as sponges made of viscose, cellulose ethers, cellulose esters, etc., or sponges made of mixtures thereof. It may be a thing.

Moreover, the form which adheres the foam material which comprises the variable body 6 to the base | substrate 5 is not specifically limited. For example, the variable body 6 may be fixed to the base 5 with an adhesive, or may be fixed to the base 5 by integrally molding the variable body 6 with the base. When the variable body 6 is integrally molded with the base body 5, the front portion 61 of the variable body 6 is placed at a predetermined position in an injection molding machine (not shown) having a cavity (not shown) shaped to match the base body 5. It arrange | positions so that a cavity wall may be touched, resin is inject | poured and insert molding is carried out. When performing the insert molding, if the variable body 6 is made of a cellulosic sponge, a part of the molten resin is impregnated with a part of the cellulosic sponge between the fibers. Are firmly integrated.
Moreover, the form which adheres the movable body 7 to the variable body 6 which consists of foam materials is not specifically limited. For example, the movable body 7 may be fixed to the variable body 6 with an adhesive, or the variable body 6 may be fixed to the variable body 6 by being integrally formed with the movable body 7.

  Moreover, although the example which the base | substrate 5 consists of a molded object of a synthetic resin was described, as long as it has rigidity from a cellulose sponge and other foam materials, such as a metal, you may consist of another material. Further, the position of the attachment portion 60 of the variable body 6 with respect to the base body 5 may be appropriately changed according to the purpose. For example, you may attach the variable body 6 to the site | part of the inner surface of the base | substrate 5 corresponded to the constriction part 3a of the water jacket 3. FIG. Furthermore, although the example in which the protruding direction of the protrusion 50 of the base body 5 and the expansion direction of the variable body 6 face the cylinder bore 2 side inner wall surface 3c of the water jacket 3 has been described, it faces the inner wall surface 3d opposite to the cylinder bore 2. You may do it.

10 Internal combustion engine 1 Cylinder block 2 Cylinder bore 3 Water jacket (cooling water flow path)
3c, 3d Water jacket inner wall (wall, opposite wall)
DESCRIPTION OF SYMBOLS 30 Opening part 4 Control member 5 Base body 50 Protrusion part 500 Bending part 6 Variable body 61 Front part (part facing a wall surface)
DESCRIPTION OF SYMBOLS 7 Movable body 71 Front side part 71a End part of front side 72 Side side part 70 Abutting part 70a Depth direction bottom side end part of abutting part 700 Depth direction bottom side end part of movable body a Flow of cooling water Direction b Water jacket width direction

Claims (10)

A cooling water passage provided in a cylinder block of the internal combustion engine is inserted through the opening and disposed, and is a regulating member that regulates the flow of cooling water in the cooling water passage,
A base formed in a shape that can be arranged at a predetermined position in the cooling water flow path;
A variable body attached to the base body and capable of expanding in the width direction of the cooling water flow path;
A movable body attached to the variable body and movable in the width direction of the cooling water flow path together with the variable body as the variable body expands;
A protrusion provided on the base at a position upstream of the variable body in the flow direction of the cooling water so as to protrude in the width direction of the cooling water flow path;
The said movable body has the side part located in the flow direction upstream of the cooling water in the said variable body, The regulating member characterized by the above-mentioned. The regulating member according to claim 1,
The movable body has a front side portion fixed to a portion of the variable body facing the wall surface of the cooling water flow path, and the side portion is not fixed to the variable body from an end portion of the front side portion. It is formed so that it may extend in, and the regulating member characterized by the above-mentioned. In the regulating member according to claim 1 or 2,
The restricting member, wherein the protrusion on the base body and the side portion on the movable body are formed so that at least a part thereof overlaps with a flow direction of the cooling water. In the regulating member according to any one of claims 1 to 3,
The protrusion in the said base | substrate is formed in the rib shape, The regulating member characterized by the above-mentioned. In the regulating member according to any one of claims 1 to 3,
The protrusion on the base is formed so as to form a part of a bent portion formed on the base. In the regulating member according to any one of claims 1 to 5,
The variable body is capable of holding at least a part thereof in a compressed state and is made of a foam material that reacts with moisture or heat and expands at least in the width direction of the cooling water flow path. A regulating member. The regulating member according to claim 6,
The said variable body is comprised by the cellulosic sponge which can be restored from the compressed state in response to cooling water, The regulating member characterized by the above-mentioned. In the restricting member according to claim 6 or 7,
The regulating member, wherein the variable body in the compressed state is configured so that the movable body does not interfere with a wall surface of the cooling water channel when inserted into the cooling water channel. In the regulating member according to any one of claims 1 to 5,
The regulating member is configured by an elastic body that can reversibly expand and contract in the width direction of the cooling water flow path. The regulating member according to claim 9,
The movable body includes an abutting portion that abuts against an opposing wall surface of the cooling water flow path with elasticity of the elastic body, and a depth side bottom side end portion of the cooling water flow path in the movable body is formed of the elastic body. In the non-compressed state, it does not interfere with the opening of the cooling water flow path, and the end in the depth direction of the contact portion has a shape inclined toward the bottom and the base. A regulating member characterized by the above.

Images