WO2020036052A1 - Isolateur de paroi d'alésage de cylindre, moteur à combustion interne et automobile - Google Patents

Isolateur de paroi d'alésage de cylindre, moteur à combustion interne et automobile Download PDF

Info

Publication number
WO2020036052A1
WO2020036052A1 PCT/JP2019/029389 JP2019029389W WO2020036052A1 WO 2020036052 A1 WO2020036052 A1 WO 2020036052A1 JP 2019029389 W JP2019029389 W JP 2019029389W WO 2020036052 A1 WO2020036052 A1 WO 2020036052A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling water
cylinder bore
water flow
flow path
groove
Prior art date
Application number
PCT/JP2019/029389
Other languages
English (en)
Japanese (ja)
Inventor
佐藤　絢也
辰徳 片岡
Original Assignee
ニチアス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニチアス株式会社 filed Critical ニチアス株式会社
Priority to EP19850392.2A priority Critical patent/EP3839237A4/fr
Publication of WO2020036052A1 publication Critical patent/WO2020036052A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/021—Cooling cylinders

Definitions

  • the present invention relates to a heat retaining tool disposed in contact with a wall surface of a cylinder block wall of a cylinder block of an internal combustion engine on a groove-shaped cooling water flow path side, an internal combustion engine including the same, and an automobile having the internal combustion engine.
  • the fuel explodes at the top dead center of the piston in the bore, and the explosion pushes down the piston. Due to this structure, the temperature on the upper side of the cylinder bore wall increases and the temperature on the lower side decreases. Therefore, a difference occurs in the amount of thermal deformation between the upper side and the lower side of the cylinder bore wall, and the upper side expands greatly, while the lower side expands less.
  • Patent Literature 1 discloses a flow that divides a groove-shaped cooling heat medium flow path into a plurality of flow paths by being arranged in a groove-shaped cooling heat medium flow path formed in a cylinder block of an internal combustion engine.
  • a road partitioning member formed at a height less than the depth of the groove-shaped cooling heat medium flow path, and a bore-side flow path and an anti-bore-side flow path in the groove-shaped cooling heat medium flow path.
  • a flow channel dividing member that becomes a wall portion to be divided into the heat medium for forming the groove-shaped cooling heat medium from the flow channel dividing member toward the opening of the groove-shaped cooling heat medium flow channel;
  • the leading edge portion is bent by its own bending and restoring force.
  • the wall temperature of the cylinder bore wall can be made uniform to some extent, so that the difference in the amount of thermal deformation between the upper side and the lower side of the cylinder bore wall is reduced.
  • only uniform control can be performed on the entire cylinder bore wall.
  • Patent Literature 2 discloses a heat retaining device for selectively retaining only the bore wall of one cylinder bore among the cylinder bores.
  • JP 2008-31939 A (Claims) JP 2007-162473 A (FIG. 4)
  • Cooling water with a low temperature flows near the cylinder bore wall near the inlet of the cooling water to the grooved cooling water flow path of the cylinder block, and the flow of the cooling water is high. Is too low. For this reason, it is necessary to install a heat retaining tool for selectively retaining the temperature of the cylinder bore wall near the inlet of the cooling water. For this purpose, a warming device of the cylinder bore wall for warming the portion facing the inlet of the cooling water is installed.
  • an object of the present invention is a heat retention device for keeping the temperature of a cylinder bore wall opposite to an inlet of cooling water to a groove-shaped cooling water flow path of a cylinder block, in a vertical direction and a circumferential direction of a groove-shaped cooling water flow path. It is an object of the present invention to provide a cylinder bore wall heat retaining device capable of restricting the movement of the cylinder bore.
  • the present invention (1) is provided in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine having the cylinder bore, for keeping the temperature of the bore wall facing the inlet of the cooling water into the grooved cooling water flow path.
  • the metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path.
  • Position is outside the position of the outer wall surface of the groove-shaped cooling water flow path, having a movement restricting portion for restricting the movement of the metal base member, It is intended to provide a cylinder bore wall heat insulator characterized by the following.
  • the present invention (2) provides the cylinder bore wall heat retaining device according to (1), wherein the rubber member is a heat-expandable rubber or a water-swellable rubber.
  • the present invention (3) provides an internal combustion engine characterized in that a heat retaining member for the cylinder bore wall of either (1) or (2) is provided in the groove-shaped cooling water flow path.
  • the present invention (4) provides an automobile having the internal combustion engine of (3).
  • ADVANTAGE OF THE INVENTION is a heat retention tool for keeping the temperature of the cylinder bore wall facing the inflow of the cooling water into the grooved cooling water flow path of the cylinder block, and moves vertically and circumferentially of the grooved cooling water flow path. Can be provided.
  • FIG. 2 is a sectional view taken along line xx of FIG. 1. It is a perspective view of the cylinder block shown in FIG.
  • FIG. 2 is a top view of an inlet of cooling water of a cylinder block shown in FIG. 1.
  • FIG. 2 is a view of an inlet of cooling water of a cylinder block shown in FIG. 1 as viewed from a groove-shaped cooling water flow path side.
  • FIG. 2 is a diagram of a cooling water supply port of the cylinder block shown in FIG. 1 as viewed from the outside.
  • FIG. 11 is an end view taken along line xx of FIG. 10.
  • FIG. 8 is a diagram showing how to overlap each member of the heat retaining tool 30 on the cylinder bore wall in FIG. 7.
  • FIG. 8 is a diagram showing how to overlap each member of the heat retaining tool 30 on the cylinder bore wall in FIG. 7.
  • FIG. 8 is a view showing a cut-off portion for forming the elastic portion attaching member 31 in FIG. 7 from a metal plate.
  • FIG. 8 is a diagram showing a cut-off portion for forming a front-side butt plate 34 in FIG. 7 from a metal plate.
  • FIG. 2 is a schematic view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
  • FIG. 2 is a schematic plan view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
  • FIG. 2 is a schematic end view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
  • FIG. 1 is a schematic view showing a state in which a cylinder wall warmer 30 is installed on a cylinder block 11 shown in FIG. 1.
  • FIG. 19 is a view showing a state where the heat-sensitive expansion rubber 33 in FIG. 18 is expanded and is in contact with the bore wall.
  • FIG. 4 is a schematic plan view showing movement of a heat retaining tool 30 on a cylinder bore wall and a flow of cooling water during operation of the internal combustion engine.
  • FIG. 4 is a schematic end view showing movement of a heat retaining tool 30 on a cylinder bore wall and a flow of cooling water during operation of the internal combustion engine.
  • FIGS. 1 to 3 show an embodiment of a cylinder block on which a cylinder bore wall warmer of the present invention is installed
  • FIG. 1 shows a cylinder block on which a cylinder bore wall warmer of the present invention is installed
  • FIG. 2 is a schematic plan view
  • FIG. 2 is a sectional view taken along line xx of FIG. 1
  • FIG. 3 is a perspective view of the cylinder block shown in FIG.
  • FIG. 4 is a view of the cooling water inlet of the cylinder block as viewed from above, FIG.
  • FIG. 5 is a view of the cooling water inlet of the cylinder block as viewed from the groove-shaped cooling water flow path side
  • FIG. FIG. 4 is a diagram of a cooling water supply port viewed from the outside.
  • FIG. 7 is a schematic perspective view showing an embodiment of the cylinder bore wall heat retaining device of the present invention.
  • FIG. 8 is a view of the heat retaining member 30 on the cylinder bore wall in FIG. 7 as viewed from the heat-sensitive expansion rubber side.
  • FIG. 9 is a view of the heat retaining member 30 of the cylinder bore wall in FIG. 7 as viewed from the rear side.
  • FIG. 10 is a diagram of the cylinder bore wall warmer 30 in FIG. 7 as viewed from above.
  • FIG. 11 is an end view taken along line xx of FIG. FIG.
  • FIG. 12 and FIG. 13 are diagrams showing how to overlap the members of the heat retaining tool 30 on the cylinder bore wall in FIG.
  • FIG. 14 is a view showing a cut-off portion for forming the elastic member 31 in FIG. 7 from a metal plate.
  • FIG. 15 is a diagram showing a cut-off portion for forming the front-side butt plate 34 in FIG. 7 from a metal plate.
  • the wall that separates the bore 12 from the groove-shaped cooling water flow path 14 is the cylinder bore wall 13.
  • a cooling water supply path 15 for supplying cooling water to the grooved cooling water flow path 14 and a cooling water discharge port 16 for discharging cooling water from the grooved cooling water flow path 14 are formed. Have been.
  • the bore 12 includes end bores 12a1 and 12a2 adjacent to one bore and intermediate bores 12b1 and 12b2 sandwiched between the two bores (the number of bores in the cylinder block is two. In this case, only the end bore is used.)
  • the end bores 12a1 and 12a2 are bores at both ends
  • the intermediate bores 12b1 and 12b2 are bores between the end bore 12a1 at one end and the end bore 12a2 at the other end.
  • the wall between the end bore 12a1 and the intermediate bore 12b1, the wall between the intermediate bore 12b1 and the intermediate bore 12b2, and the wall between the intermediate bore 12b2 and the end bore 12a2 are portions sandwiched between the two bores. Therefore, since heat is transmitted from the two cylinder bores, the wall temperature is higher than the other walls. For this reason, in the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14, the temperature becomes highest near the inter-bore wall 191. The temperature at and near the wall boundary 192 is highest.
  • the wall surface on the cylinder bore 13 side is described as a wall surface 17 on the cylinder bore side of the grooved cooling water flow path.
  • the wall surface of the cooling water flow path opposite to the wall surface 17 on the cylinder bore side is referred to as an outer wall surface 18 of the groove-shaped cooling water flow path.
  • the cooling water supply path 15 formed in the cylinder block 11 includes a cooling water supply port 151 for supplying cooling water from the outside to the cylinder block 11 and a cooling water supplied to the cylinder block 11.
  • the cooling water supply system includes a front-stage supply chamber 152 for cooling water once supplied, and an inlet 153 for cooling water for flowing the cooling water from the front-stage supply chamber 152 into the groove-shaped cooling water flow path 14.
  • the cylinder block 11 is provided with a cooling water discharge port 16 for discharging the cooling water from the groove-shaped cooling water flow path 14 to the outside of the cylinder block 11.
  • the cooling water supplied from the cooling water supply port 151 to the cylinder block 11 flows into the groove-shaped cooling water flow path 14 from the cooling water inlet 153 through the pre-stage supply chamber 152.
  • an upper groove-like cooling water flow path 14 on the paper surface and a lower groove-like cooling water flow path 14 are divided and flow toward a cooling water discharge port 16. It is discharged out of the block 11.
  • a cylinder bore wall heat retaining device 30 shown in FIGS. 7 to 11 keeps the bore wall facing the cooling water inlet 153 provided in the cylinder block 11 in FIG. 1, that is, the bore wall 20 of the cylinder bore 12a2 warm. It is a warming tool for. Therefore, the heat retaining tool 30 of the cylinder bore wall is provided in the groove-shaped cooling water flow path 14 near the cooling water inlet 153.
  • the cylinder bore wall heat retaining member 30 has a metal leaf spring 37 and a movement limiting metal plate 38 attached thereto, and has an elastic portion attaching member 31 formed in an arc shape when viewed from above, and an arc-shaped member 31 when viewed from above.
  • a rear-side pressing member 32, a heat-sensitive expansion rubber 33, and a front-side backing plate 34, which is formed in an arc shape when viewed from above, are sequentially superimposed on each other.
  • the bent portion 35a formed, the bent portion 35b formed at the lower end of the elastic portion attaching member 31, the bent portion 36a formed at the right end of the elastic portion attaching member 31, and the left end of the elastic portion attaching member 31 As shown in FIG.
  • the bent portion 36 b is bent toward the front-side backing plate 34, and the back portion is provided between the bent portions 35 a, 35 b, 36 a, 36 b and the elastic portion attaching member 31.
  • Side pressing member 32 by thermal expansion rubber 33 and the front contact plate 34 is sandwiched, it is produced. That is, the heat retaining member 30 of the cylinder bore wall has the thermal expansion rubber 33 and the metal base member 29 including the elastic portion attaching member 31, the back pressing member 32, and the front side contact plate 34.
  • the elastic portion attaching member 31, the rear pressing member 32, and the front side contact plate 34 jointly fix the thermal expansion rubber 33.
  • the member 32 and the front side supporting plate 34 are metal base members.
  • the thermal expansion rubber 33 is a member that thermally expands in the groove-shaped cooling water flow path, directly contacts the bore wall 20 of the cylinder bore 12a2, covers a heat retaining portion of the bore wall 20, and keeps the bore wall 20 warm.
  • the rear-side pressing member 32 is formed in an arc shape when viewed from above, and is formed on the rear surface of the thermal expansion rubber 33 so that the entire thermal expansion rubber 33 can be pressed from the rear side of the thermal expansion rubber 33. Side (the surface opposite to the contact surface 26).
  • the elastic member 31 is formed in an arc shape when viewed from above, and has a shape along the rear surface of the rear pressing member 32 (the surface opposite to the thermal expansion rubber 33).
  • the elastic portion attaching member 31 is provided with a metal leaf spring 37 as an elastic portion and a movement limiting metal plate 38 as a movement limiting portion.
  • the metal plate spring 37 is a vertically long rectangular metal plate, and one end in the longitudinal direction is connected to the elastic portion attaching member 31.
  • the metal leaf spring 37 is attached to the elastic member 33 so that the other end is separated from the elastic member 31 by being bent from the elastic member 31 at one end connected to the elastic member 31. Have been.
  • the other end of the metal leaf spring 37 is bent at the position of the contact portion 371 such that the contact portion 371 contacts the outer wall surface 18 of the groove-shaped cooling water flow path.
  • the movement restricting metal plate 38 is a rectangular metal plate, and is attached to the elastic member 33 so as to extend horizontally from the back side of the elastic member 31 to the outside.
  • the front-side backing plate 34 is formed in an arc shape when viewed from above, and has a rectangular opening 301 when viewed from the front side. Then, a bent portion 35a formed at the upper end of the elastic member 31, a bent portion 35b formed at the lower end of the elastic member 31, a bent portion 36a formed at the right end of the elastic member 31, A bent portion 36b formed on the left end of the elastic portion attaching member 31 is bent toward the front-side backing plate 34, and a back surface is provided between the elastic portion attaching member 31 and the bent portions 35a, 35b, 36a, 36b.
  • These members are fixed by sandwiching the side pressing member 32, the thermal expansion rubber 33, and the front side backing plate 34.
  • the surface opposite to the rear-side pressing member 32 is the contact surface 26 that is in contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
  • the heat-sensitive expansion rubber 33 expands and comes into contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 of the cylinder block 11.
  • the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 is covered with the thermal expansion rubber 33.
  • the metal plate spring 37 projecting toward the side opposite to the thermal expansion rubber 33 contacts the wall surface opposite to the wall surface 17 on the cylinder bore side, that is, the outer wall surface 18 of the groove-shaped cooling water flow path 14. And generate an urging force.
  • the rear surface pressing member 32 presses the thermal expansion rubber 33 from the rear side toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path 14 by the generated urging force of the metal leaf spring 37. Is in close contact with the wall surface 17 of the groove-shaped cooling water flow path 14 on the cylinder bore side.
  • FIGS. 12 and 13 A procedure for manufacturing the cylinder bore wall heat retaining device 30 will be described. As shown in FIGS. 12 and 13, the front contact plate 34 is aligned with the contact surface of the thermal expansion rubber 33, and the rear pressing member 32, the metal plate spring 37, and the movement limiting metal are disposed on the rear side of the thermal expansion rubber 33.
  • the plate 38 and the elastic member 31 provided with the bent portions 35a, 35b, 36a, 36b are sequentially joined together, and then the bent portions 35a, 35b, 36a, 36b are bent, as shown in FIGS. 7 to 11.
  • the back pressing member 32, the thermal expansion rubber 33, and the front side contact plate 34 are sandwiched between the elastic portion attaching member 31 and the bent portions 35a, 35b, 36a, 36b, so that the elastic portion attaching member 31, the back surface
  • the thermal expansion rubber 33 is fixed to the metal base member 29 composed of the pressing member 32 and the front backing plate 34, and the cylinder bore wall heat insulator 30 is manufactured.
  • the procedure for manufacturing the elastic member 33 is as follows. As shown in FIG. 14, a metal plate 51 is prepared, and the hatched portion in FIG. 38, the bent portions 35a, 35b, 36a, 36b are formed, and a punched product 52 of a metal plate is produced. Next, the whole punched material 52 of a metal plate is formed into an arc shape, and the metal plate spring 37 is bent so as to protrude to the rear side. Further, the distal end side of the metal plate spring 37 is bent, and the movement limiting metal plate 38 is formed. The elastic portion attaching member 31 is manufactured by bending so as to extend in the horizontal direction. Also, as shown in FIG. 15, a metal plate 53 is prepared, and a hatched portion in FIG. 15 is cut off to form an opening 301. The punched material 54 is manufactured. Next, the front side backing plate 34 is manufactured by forming the punched object 54 of a metal plate into an arc shape.
  • FIG. 16 is a schematic diagram showing a state in which a cylinder bore wall warming device 30 is installed in the cylinder block 11 shown in FIG.
  • the heat retaining tool 30 of the cylinder bore wall is inserted into the groove-shaped cooling water flow path 14 of the cylinder block 11 at a position where the cooling water inlet 153 is formed, and FIG.
  • the heat retaining tool 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14.
  • the cylinder bore wall heat insulator 30 is installed such that the movement limiting metal plate 38 of the cylinder bore wall heat insulator 30 enters the coolant inlet 153.
  • FIGS. 17 and 18 are schematic views showing a state in which the cylinder block wall warming device 30 is installed in the cylinder block 11 shown in FIG. 1.
  • FIG. 17 is an enlarged view near the installation position of the cylinder bore wall warming device 30.
  • FIG. 17 is a plan view, and FIG. 18 is an end view.
  • the thermal expansion rubber 33 is heated and thermally expanded. Then, as shown in FIG. 19, the thermal expansion rubber 33 expands toward the cylinder bore side wall surface 17 through the opening 301 formed in the inner portion of the front side backing plate 34, and the contact surface 26 becomes in contact with the cylinder bore. Contacts the side wall surface 17. Even after the contact surface 26 contacts the wall surface 17 on the cylinder bore side, the thermal expansion rubber 33 continues to expand and tends to expand to the open state. Therefore, a force is applied to the contact portion 371 of the metal leaf spring 37 in a direction toward the elastic portion attaching member 31.
  • the metal leaf spring 37 is deformed so that the contact portion 371 approaches the elastic portion attaching member 31 side, so that the metal leaf spring 37 has an elastic force to return to the original state.
  • the elastic portion attaching member 31 is pushed toward the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path, and as a result, by the rear side pushing member 32 pushed by the elastic portion attaching member 31, The thermal expansion rubber 33 is pressed against the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
  • the heat retaining member 30 of the cylinder bore wall is installed in the groove-shaped cooling water flow path 14, and the thermal expansion rubber 33 is heated and thermally expanded, whereby the metal leaf spring 37 is deformed, and the elasticity generated when the deformation tends to return.
  • the rear-side pressing member 32 is urged by the force so as to press the thermal expansion rubber 33 against the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
  • the heat-sensitive expansion rubber 33 of the heat retaining device 30 on the cylinder bore wall comes into contact with the wall surface 17 on the cylinder bore side of the groove-shaped cooling water flow path.
  • FIG. 19 is a view showing a state where the heat-sensitive expansion rubber 33 in FIG. 18 is expanded and is in contact with the bore wall.
  • the movement limiting metal plate 38 extends toward the inner lower part of the cooling water inlet 153.
  • the extension end 382 of the movement limiting metal plate 38 is located outside the position of the outer wall surface 18 of the groove-shaped cooling water flow path 14.
  • the movement of the heat retaining member 30 of the cylinder bore wall to the left is limited to a position where the lateral end 381a of the movement limiting metal plate 38 contacts the inner wall 154a of the cooling water inlet 153.
  • the movement limiting metal plate 38 causes the movement of the heat retaining tool 30 of the cylinder bore wall to the right in the circumferential direction of the groove-shaped cooling water flow path in FIG. It is limited to a position where it contacts the inner wall 154b of the inflow port 153.
  • vibration during operation of the internal combustion engine causes the heat retaining tool 30 on the cylinder bore wall to move up and down as indicated by reference numeral 42.
  • the movement-restricting metal plate 38 of the cylinder bore wall warmer 30 extends to the inside of the cooling water inlet 153, the movement of the cylinder bore wall warmer 30 in the downward direction in FIG.
  • the lower surface 383 of the limiting metal plate 38 is limited by contact with the inner wall 155 of the cooling water inlet 153.
  • the cooling water 40 flows from the front-stage supply chamber 152 to the cooling water inlet 153, and then extends from the extension end 382 of the movement limiting metal plate 38 to the movement limiting metal plate 38.
  • the cooling water flows toward the lower side of the groove-shaped cooling water flow path 14. Therefore, the movement-limiting metal plate 38 is pushed from above by the water flow of the cooling water flowing downward from the upper side of the movement-limiting metal plate 38 to the side of the movement-limiting metal plate 38. Then, the flow of the cooling water restricts the upward movement of the warming device 30 of the cylinder bore wall in FIG. 21.
  • FIG. 20 and FIG. 21 are schematic diagrams showing movement of the warming device 30 on the cylinder bore wall and the flow of cooling water during operation of the internal combustion engine, and are enlarged views of the vicinity of the installation position of the warming device 30 on the cylinder bore wall. 20 is a plan view, and FIG. 21 is an end view.
  • a heat retaining device for a cylinder bore wall of the present invention is provided in a groove-shaped cooling water flow path of a cylinder block of an internal combustion engine having a cylinder bore, for keeping the bore wall opposed to an inlet of cooling water into the grooved cooling water flow path warm.
  • the metal base member has a rear pressing portion for pressing the entire rubber member from the rear side toward the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and a rear surface pressing portion for pressing the entire rubber member toward the wall surface on the cylinder bore side of the grooved cooling water flow path.
  • the cylinder wall warmer of the present invention is installed in the groove-shaped cooling water flow path of the cylinder block of the internal combustion engine.
  • the cylinder block on which the cylinder bore wall heat retaining device of the present invention is installed is an open deck type cylinder block in which two or more cylinder bores are formed in series.
  • the cylinder block has a cylinder bore having two end bores.
  • the cylinder block has a cylinder bore having two end bores and one or more intermediate bores. ing.
  • bores at both ends are called end bores
  • a bore sandwiched between other cylinder bores on both sides is called an intermediate bore.
  • a groove-shaped cooling water flow path for flowing cooling water is formed in the cylinder block on which the heat retaining device of the cylinder bore wall of the present invention is installed.
  • the wall that separates the bore from the groove-shaped cooling water flow path is a cylinder bore wall.
  • the cylinder block is provided with a cooling water supply path for supplying cooling water to the grooved cooling water flow path and a cooling water discharge port for discharging cooling water from the grooved cooling water flow path.
  • the position and shape of the cooling water supply port for supplying the cooling water into the cylinder block, the position and shape of the cooling water inlet to the groove-shaped cooling water flow path, the supply of the cooling water is appropriately selected. Since the temperature is higher above the cylinder bore wall, the vertical position of the cooling water inlet is usually above the groove-shaped cooling water flow path. Further, the supply port of the cooling water to the cylinder block is usually provided below. Also, since the position of the cooling water supply port to the cylinder block and the position of the cooling water inflow port to the groove-shaped cooling water flow path are usually different in the vertical direction, a path connecting them (see FIG. 1). In the embodiment shown, a pre-stage supply chamber 152) for cooling water is provided.
  • the cylinder bore wall opposed to the cooling water inlet has another wall. It will be overcooled compared to the bore wall. Therefore, the cylinder bore wall heat retaining device of the present invention is installed in order to prevent the cylinder bore wall facing the cooling water inlet from being excessively cooled. For this reason, the position where the heat retaining device of the cylinder bore wall of the present invention is installed is near the position where the cooling water inlet is formed in the groove-shaped cooling water flow path.
  • the vertical position of the cylinder bore wall, the size of the rubber member, and the installation range to be kept warm by the cylinder bore wall warming tool of the present invention are appropriately selected.
  • the cylinder bore wall heat retainer of the present invention has a rubber member and a metal base member.
  • the rubber member is a member that directly contacts the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, covers the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, and keeps the cylinder bore wall warm.
  • the member is pressed against the wall surface on the cylinder bore side of the groove-shaped cooling water flow path. Therefore, when viewed from above, the rubber member is formed into a shape along the wall surface facing the cooling water inlet, of the wall surface on the cylinder bore side of the groove-shaped cooling water flow path, that is, an arc-shaped shape. I have.
  • the shape of the rubber member when viewed from the side is appropriately selected according to the wall surface on the cylinder bore side of the groove-shaped cooling water passage to be covered with the rubber member.
  • Examples of the material of the rubber member include rubber such as solid rubber, expanded rubber, foamed rubber, and soft rubber, and a silicone-based gel material.
  • the rubber member comes into strong contact with the cylinder bore wall, so that the rubber member can be prevented from being shaved.
  • a heat-sensitive rubber or a water-swellable rubber capable of expanding the rubber member portion in the groove-shaped cooling water flow path later is preferable.
  • the biasing force is generated exclusively by the elastic portion, and the material of the rubber member is a material that expands in the groove-shaped cooling water flow path. In this case, the biasing force is generated by the joint of the elastic portion and the expanded rubber.
  • composition of the solid rubber examples include natural rubber, butadiene rubber, ethylene propylene diene rubber (EPDM), nitrile butadiene rubber (NBR), silicone rubber, and fluoro rubber.
  • the expanded rubber examples include a thermally expanded rubber.
  • the thermal expansion rubber is a composite obtained by impregnating a base foam material with a thermoplastic material having a lower melting point than the base foam material and compressing the same.At normal temperature, the compressed state is maintained at least by a cured product of the thermoplastic material present in the surface layer. In addition, the cured material of the thermoplastic material is softened by heating to release the compressed state.
  • Examples of the thermal expansion rubber include a thermal expansion rubber described in JP-A-2004-143262.
  • the heat retaining member of the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, and heat is applied to the thermal expansion rubber, so that the thermal expansion rubber expands to a predetermined temperature. It expands and deforms to the shape of.
  • Examples of the base foam material relating to the heat-sensitive expansion rubber include various polymer materials such as rubber, elastomer, thermoplastic resin, and thermosetting resin. Specific examples include natural rubber, chloropropylene rubber, styrene butadiene rubber, and nitrile. Various thermosetting resins such as butadiene rubber, ethylene propylene diene terpolymer, various synthetic rubbers such as silicone rubber, fluorine rubber and acrylic rubber, various elastomers such as soft urethane, hard urethane, phenol resin, and melamine resin. Can be
  • thermoplastic substance relating to the heat-expandable rubber one having any of a glass transition point, a melting point, and a softening temperature of less than 120 ° C is preferable.
  • thermoplastic substance relating to the thermal expansion rubber include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyacrylate, styrene butadiene copolymer, chlorinated polyethylene, polyvinylidene fluoride, and ethylene acetate.
  • Vinyl copolymer ethylene vinyl acetate vinyl chloride acrylate copolymer, ethylene vinyl acetate acrylic ester copolymer, ethylene vinyl acetate vinyl chloride copolymer, nylon, acrylonitrile butadiene copolymer, polyacrylonitrile, polyvinyl chloride
  • Thermoplastic resin such as polychloroprene, polybutadiene, thermoplastic polyimide, polyacetal, polyphenylene sulfide, polycarbonate, thermoplastic polyurethane, low melting glass frit, starch Solder include various thermoplastic compounds such as wax.
  • examples of the expanded rubber include a water-swellable rubber.
  • the water-swellable rubber is a material in which a water-absorbing substance is added to rubber, and is a rubber material having shape retention properties that absorbs water, swells, and maintains an expanded shape.
  • examples of the water-swellable rubber include, for example, a crosslinked product of a polyacrylic acid neutralized product, a crosslinked product of a starch acrylic acid graft copolymer, a crosslinked carboxymethylcellulose salt, and a rubber material in which a water-absorbing substance such as polyvinyl alcohol is added to the rubber. No.
  • water-swellable rubber examples include a water-swellable rubber containing a ketiminated polyamide resin, a glycidyl etherified product, a water-absorbing resin and rubber described in JP-A-9-208752.
  • the heat retaining tool of the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, the cooling water is flown, and the water-swellable rubber absorbs water.
  • the swellable rubber expands and expands into a predetermined shape.
  • Foam rubber is a porous rubber.
  • the foamed rubber include a sponge-like foamed rubber having an open-cell structure, a foamed rubber having a closed-cell structure, and a semi-closed foamed rubber.
  • Specific examples of the material of the foamed rubber include an ethylene propylene diene terpolymer, a silicone rubber, a nitrile butadiene copolymer, a silicone rubber, a fluorine rubber and the like.
  • the foaming rate of the foamed rubber is not particularly limited, is appropriately selected, and the moisture content of the rubber member can be adjusted by adjusting the foaming rate.
  • the foaming rate of the foamed rubber refers to a density ratio before and after foaming represented by ((density before foaming-density after foaming) / density before foaming) ⁇ 100.
  • the heat retaining tool for the cylinder bore wall of the present invention is installed in the groove-shaped cooling water flow path, When the cooling water is caused to flow, the rubber member contains water.
  • the range of the water content of the rubber member when the cooling water flows through the groove-shaped cooling water flow path is appropriately selected depending on the operating conditions of the internal combustion engine and the like.
  • the water content refers to a weight water content represented by (cooling water weight / (filler weight + cooling water weight)) ⁇ 100.
  • the shape and thickness of the rubber member are not particularly limited, and are appropriately selected.
  • the metal base member is a member to which the rubber member is fixed.
  • the metal base member has at least a back pressing part, an elastic part, and a movement restricting part.
  • the metal base member may be a member in which the back surface pressing portion, the elastic portion, and the movement restricting portion are integrated, or may be a combination of two or more members.
  • the metal base member includes a member serving as a rear surface pressing portion, a fixing portion (a bent portion, a front side contact plate, etc.) for fixing a rubber member, an elastic portion, and movement restriction.
  • It may be composed of a combination with a member provided with a portion, or a fixing portion (a bent portion, a front side contact plate, etc.) for fixing a rubber member to a member serving as a rear pressing portion may be provided.
  • the elastic portion and the movement restricting portion may be formed and provided by welding or the like.
  • the material of the metal base member is not particularly limited, but stainless steel (SUS), an aluminum alloy or the like is preferable in terms of good LLC resistance and high strength.
  • the back pressing portion is a portion for pressing the entire rubber member from the back side toward the wall surface on the cylinder bore wall side of the groove-shaped cooling water flow path.
  • the rear pressing portion has an arc shape when viewed from above, and the rear side of the rubber member (the surface opposite to the contact surface side) so that the entire rubber member can be pressed from the rear side of the rubber member. ), And covers the entire back side or almost the entire back side of the rubber member.
  • the thickness of the back pressing portion is appropriately selected.
  • the material of the back pressing portion is appropriately selected, but a metal plate such as stainless steel or an aluminum alloy is preferable.
  • the elastic portion is provided on the cylinder bore wall of the present invention on the rear side of the heat retaining member.
  • This elastic portion is elastically deformed by the heat retaining member of the cylinder bore wall of the present invention being installed in the groove-shaped cooling water flow path, and the rear surface pressing member is rubberized toward the cylinder bore side wall surface of the groove-shaped cooling water flow path.
  • This is a member for urging by an elastic force so as to press the member.
  • At least one elastic portion is provided on the cylinder bore wall heat insulator of the present invention.
  • the arc of the cylinder bore wall heat insulator of the present invention is obtained.
  • two or more are provided in the direction, and particularly preferably, three or more are provided.
  • the form of the elastic portion is not particularly limited, and examples thereof include a plate-like elastic member, a coil-like elastic member, a leaf spring, a torsion spring, and an elastic rubber.
  • a metal elastic member such as a metal leaf spring, a coil spring, a laminated leaf spring, and a torsion spring is preferable.
  • the portion in contact with the wall surface of the groove-shaped cooling water flow path opposite to the wall surface on the cylinder bore side and the vicinity thereof protrude from the wall surface of the groove-shaped cooling water flow path opposite to the wall surface on the cylinder bore side.
  • the contact portion with the wall surface of the elastic portion causes the groove-shaped cooling water flow path to be formed on the cylinder bore side. This is preferable in that the wall surface opposite to the wall surface can be prevented from being damaged.
  • the elastic member when installed in the groove-shaped cooling water flow path, the elastic member allows the rubber member to be urged with an appropriate pressing force, so that the shape of the groove-shaped cooling water flow path is adjusted.
  • the form, shape, size, installation position, number of installations, and the like of the elastic portion are appropriately selected.
  • the elastic member and the metal plate spring as the elastic member are integrally formed, and the rubber member and the rear surface pressing member are formed on the elastic member with the metal plate spring.
  • the elastic portion is attached to the heat retaining member of the cylinder bore wall, but the method of attaching the elastic portion to the heat retaining member of the cylinder bore wall is not particularly limited.
  • a metal elastic member such as a metal leaf spring, a metal coil spring, a laminated leaf spring or a torsion spring is welded to a back pressing member made of a metal plate, and the elastic portion is welded to the back pressing member.
  • a method of fixing a rubber member is welded to the back pressing member.
  • the movement restricting portion is provided on the cylinder bore wall of the present invention on the rear side of the heat retaining member. During operation of the internal combustion engine, a portion on the extension end side of the movement restriction portion enters a lower portion inside the cooling water inlet. That is, during operation of the internal combustion engine, the extending end of the movement restricting portion is located outside the outer wall surface of the groove-shaped cooling water flow path.
  • the movement restricting portion is configured such that the portion on the extension end side enters the lower portion inside the cooling water inflow port, so that the heat retaining tool of the cylinder bore wall of the present invention causes the groove cooling water flow to flow due to vibration during operation of the internal combustion engine. It is a member for restricting movement on the road.
  • the shape of the movement restricting portion extends from the rear side of the heat retaining member of the cylinder bore wall of the present invention toward the lower portion inside the cooling water inlet, and the position of the extending end is the outer wall surface of the groove-shaped cooling water flow path.
  • the shape is not particularly limited as long as it is a shape that is more outward than the shape. For example, a rectangular plate shape, a T-shaped plate shape, an L-shaped plate shape, etc. Shape.
  • the material of the movement restricting portion is not particularly limited, but stainless steel (SUS), an aluminum alloy, or the like is preferable in terms of good LLC resistance and high strength.
  • the installation position of the movement restricting portion on the rear side of the heat retaining tool of the cylinder bore wall of the present invention is not particularly limited, and is appropriately selected depending on the position and shape of the cooling water inlet.
  • the method for fixing the rubber member to the metal base member is not particularly limited.
  • a bent portion is provided on the metal base member (in the embodiment shown in FIG. 7, a member provided with an elastic portion, which is a constituent member of the metal base member).
  • a method of fixing the metal member by sandwiching the rubber member between the metal base member and the bent portion and a method of bonding the rubber member to the metal base member using an adhesive.
  • the rubber member may be directly sandwiched between the bent portions, or if the rubber is expanded rubber, the embodiment shown in FIG. As described above, the rubber member may be sandwiched between the bent portions via the front-side contact plate with the front-side contact plate interposed on the contact surface side of the rubber member.
  • the metal base member has at least an elastic part, a movement restricting part, and a back pressing part.
  • the elastic part, the movement restricting part, and the back pressing part may all be provided in one member.
  • all or a part of the elastic portion, the movement restricting portion, and the back pressing portion may be provided in different members, and the metal base member may be configured by combining the members provided with these members.
  • the cylinder bore wall warmer of the present invention moves in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path due to vibration during operation of the internal combustion engine.
  • the movement restricting portion since the movement restricting portion extends to the inside of the cooling water inlet, the movement restricting portion restricts the circumferential movement of the groove-shaped cooling water flow path. Is limited to a position where the lateral end of the section contacts the inner wall of the cooling water inlet.
  • the movement restricting portion extends to the inside of the cooling water inlet, the downward movement of the heat retaining member of the cylinder bore wall of the present invention causes the inner surface of the cooling water inlet to move downward.
  • the cooling water flowing from the cooling water inlet flows through the upper surface of the movement restricting portion, and then flows toward the lower side of the groove-shaped cooling water flow path, and flows laterally of the movement restricting portion. Is pushed from the upper side by the water flow of the cooling water, so that the flow of the cooling water restricts the upward movement of the heat retaining member of the cylinder bore wall of the present invention.
  • the cooling water inflow extends toward the inside lower part, and the position of the extending end is the position of the outer wall surface of the groove-shaped cooling water flow path.
  • the provision of the movement restricting portion at the outermost position restricts the movement of the cylinder-wall warmer of the present invention in the vertical direction and the circumferential direction of the groove-shaped cooling water flow path.
  • An internal combustion engine according to an embodiment of the present invention is provided with the cylinder bore wall heat retaining device of the present invention.
  • the vehicle of the present invention is a vehicle having the internal combustion engine of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un isolant pour une paroi d'alésage de cylindre pour isoler thermiquement une paroi d'alésage opposée à une ouverture d'entrée pour introduire de l'eau de refroidissement dans un canal d'écoulement d'eau de refroidissement en forme de rainure, ledit isolant ayant : un élément en caoutchouc qui entre en contact avec une surface de paroi sur le côté alésage de cylindre du canal d'écoulement d'eau de refroidissement en forme de rainure, et est destiné à recouvrir la surface de paroi sur le côté alésage de cylindre du canal d'écoulement d'eau de refroidissement en forme de rainure ; et un élément de corps de base métallique auquel est fixé l'élément en caoutchouc. L'élément de corps de base métallique comporte : une partie de pression de surface arrière ; une partie élastique ; et une partie de restriction de mouvement qui s'étend à partir de la surface arrière de l'élément de corps de base métallique vers une partie inférieure sur l'intérieur de l'ouverture d'entrée d'eau de refroidissement d'un bloc-cylindres, la position de l'extrémité d'extension se trouvant à l'extérieur de la position de la surface de paroi sur l'extérieur du canal d'écoulement d'eau de refroidissement en forme de rainure, et qui limite le mouvement de l'élément de corps de base métallique. Ainsi, il est possible de fournir un isolant pour isoler thermiquement une paroi d'alésage de cylindre opposée à une ouverture d'entrée pour introduire de l'eau de refroidissement dans un canal d'écoulement d'eau de refroidissement en forme de rainure, ledit isolant pouvant limiter le mouvement dans la direction haut-bas et la direction circonférentielle d'un canal d'écoulement d'eau de refroidissement en forme de rainure.
PCT/JP2019/029389 2018-08-13 2019-07-26 Isolateur de paroi d'alésage de cylindre, moteur à combustion interne et automobile WO2020036052A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19850392.2A EP3839237A4 (fr) 2018-08-13 2019-07-26 Isolateur de paroi d'alésage de cylindre, moteur à combustion interne et automobile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-152332 2018-08-13
JP2018152332A JP6793694B2 (ja) 2018-08-13 2018-08-13 シリンダボア壁の保温具、内燃機関及び自動車

Publications (1)

Publication Number Publication Date
WO2020036052A1 true WO2020036052A1 (fr) 2020-02-20

Family

ID=69525460

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/029389 WO2020036052A1 (fr) 2018-08-13 2019-07-26 Isolateur de paroi d'alésage de cylindre, moteur à combustion interne et automobile

Country Status (3)

Country Link
EP (1) EP3839237A4 (fr)
JP (1) JP6793694B2 (fr)
WO (1) WO2020036052A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09208752A (ja) 1996-01-30 1997-08-12 Saitama Gomme Kogyo Kk 水膨潤性ゴム組成物
JP2004143262A (ja) 2002-10-23 2004-05-20 Nichias Corp 感熱膨張材及びその製造方法、並びに自動車用防音シート
JP2006090193A (ja) * 2004-09-22 2006-04-06 Aisan Ind Co Ltd 内燃機関の冷却装置
JP2007162473A (ja) 2005-12-09 2007-06-28 Mitsubishi Motors Corp ウォータージャケットスペーサ
JP2008031939A (ja) 2006-07-31 2008-02-14 Toyota Motor Corp 内燃機関冷却用熱媒体流路区画部材、内燃機関冷却機構及び内燃機関冷却機構形成方法
JP2009264286A (ja) * 2008-04-25 2009-11-12 Toyota Motor Corp 内燃機関の冷却構造
JP2015140657A (ja) * 2014-01-27 2015-08-03 内山工業株式会社 ウォータジャケットスペーサ
JP2017089435A (ja) * 2015-11-05 2017-05-25 ニチアス株式会社 シリンダボア壁の保温具、内燃機関及び自動車
JP2017089528A (ja) * 2015-11-12 2017-05-25 ニチアス株式会社 シリンダボア壁の保温具、内燃機関及び自動車

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4249668B2 (ja) * 2004-07-13 2009-04-02 内山工業株式会社 ウォータジャケット用スペーサ
JP6292663B2 (ja) * 2014-01-14 2018-03-14 内山工業株式会社 ウォータジャケットスペーサの固定構造
JP6340234B2 (ja) * 2014-04-11 2018-06-06 ニチアス株式会社 シリンダボア壁の保温具、内燃機関及び自動車

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09208752A (ja) 1996-01-30 1997-08-12 Saitama Gomme Kogyo Kk 水膨潤性ゴム組成物
JP2004143262A (ja) 2002-10-23 2004-05-20 Nichias Corp 感熱膨張材及びその製造方法、並びに自動車用防音シート
JP2006090193A (ja) * 2004-09-22 2006-04-06 Aisan Ind Co Ltd 内燃機関の冷却装置
JP2007162473A (ja) 2005-12-09 2007-06-28 Mitsubishi Motors Corp ウォータージャケットスペーサ
JP2008031939A (ja) 2006-07-31 2008-02-14 Toyota Motor Corp 内燃機関冷却用熱媒体流路区画部材、内燃機関冷却機構及び内燃機関冷却機構形成方法
JP2009264286A (ja) * 2008-04-25 2009-11-12 Toyota Motor Corp 内燃機関の冷却構造
JP2015140657A (ja) * 2014-01-27 2015-08-03 内山工業株式会社 ウォータジャケットスペーサ
JP2017089435A (ja) * 2015-11-05 2017-05-25 ニチアス株式会社 シリンダボア壁の保温具、内燃機関及び自動車
JP2017089528A (ja) * 2015-11-12 2017-05-25 ニチアス株式会社 シリンダボア壁の保温具、内燃機関及び自動車

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3839237A4

Also Published As

Publication number Publication date
EP3839237A1 (fr) 2021-06-23
JP2020026778A (ja) 2020-02-20
EP3839237A4 (fr) 2022-04-13
JP6793694B2 (ja) 2020-12-02

Similar Documents

Publication Publication Date Title
JP6283011B2 (ja) シリンダボア壁の保温具、内燃機関及び自動車
JP6297393B2 (ja) シリンダボア壁の保温具、内燃機関及び自動車
JP6340234B2 (ja) シリンダボア壁の保温具、内燃機関及び自動車
JP6283010B2 (ja) シリンダボア壁の保温具、内燃機関及び自動車
JP2015203313A (ja) シリンダボア壁の保温具、内燃機関及び自動車
JP5588902B2 (ja) シリンダボア壁の保温構造体、シリンダボア壁の保温方法、内燃機関及び自動車
WO2017078117A1 (fr) Réchauffeur pour paroi d'alésage de cylindre, moteur à combustion interne et automobile
JP6710169B2 (ja) 内燃機関
JP2015203315A (ja) シリンダボア壁の保温具、内燃機関及び自動車
WO2020036052A1 (fr) Isolateur de paroi d'alésage de cylindre, moteur à combustion interne et automobile
WO2018225735A1 (fr) Dispositif d'espacement de chemise d'eau, outil de chauffage de paroi d'alésage de cylindre, moteur à combustion interne et véhicule
WO2018225733A1 (fr) Outil de chauffage de paroi d'alésage de cylindre
JP2018087579A (ja) シリンダボア壁の保温具、内燃機関及び自動車
US10895219B2 (en) Cylinder bore wall thermal insulator, internal combustion engine, and automobile
JP2018048583A (ja) シリンダボア壁の保温具、内燃機関及び自動車

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19850392

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019850392

Country of ref document: EP

Effective date: 20210315