WO2017068732A1 - Structure de refroidissement pour moteur refroidi à l'eau - Google Patents

Structure de refroidissement pour moteur refroidi à l'eau Download PDF

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Publication number
WO2017068732A1
WO2017068732A1 PCT/JP2015/080043 JP2015080043W WO2017068732A1 WO 2017068732 A1 WO2017068732 A1 WO 2017068732A1 JP 2015080043 W JP2015080043 W JP 2015080043W WO 2017068732 A1 WO2017068732 A1 WO 2017068732A1
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WIPO (PCT)
Prior art keywords
cooling water
water jacket
water
cylinder
cooling
Prior art date
Application number
PCT/JP2015/080043
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English (en)
Japanese (ja)
Inventor
ヘルフェン ヨン ファン
リュディガー バイキルヒ
ペーター ラーフ
和也 古川
Original Assignee
本田技研工業株式会社
エフエーファウ ゲゼルシャフト ミット ベシュレンクテル ハフツング
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.)
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Application filed by 本田技研工業株式会社, エフエーファウ ゲゼルシャフト ミット ベシュレンクテル ハフツング filed Critical 本田技研工業株式会社
Priority to PCT/JP2015/080043 priority Critical patent/WO2017068732A1/fr
Priority to DE112015007045.1T priority patent/DE112015007045B4/de
Priority to JP2017546384A priority patent/JP6475360B2/ja
Priority to CN201580083974.3A priority patent/CN108138687B/zh
Publication of WO2017068732A1 publication Critical patent/WO2017068732A1/fr

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    • 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 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads 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
    • 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

Definitions

  • a cylinder bore row comprising a plurality of cylinder bores and a cylinder block side water jacket surrounding the cylinder bore row are formed inside the cylinder block, and the cylinder head side water jacket formed inside the cylinder head
  • the present invention relates to a cooling structure for a water-cooled engine in which cooling water is supplied from a cylinder block-side water jacket by a cooling water pump.
  • a cooling water passage is formed between adjacent cylinder bores, and one end side of the cooling water passage is communicated with the intake side of the cylinder block side water jacket, and the cooling water passage is dead end
  • a cooling water passage is formed between adjacent cylinder bores, and one end side of the cooling water passage is communicated with one of the intake side and the exhaust side of the cylinder block side water jacket, and the other end side where the cooling water passage is dead end is connected.
  • Japanese Patent Application Laid-Open Publication No. 2004-228688 discloses a technique in which the cooling effect between adjacent cylinder bores that are likely to become high temperature is enhanced by the cooling water flowing through the cooling water passage, which is communicated with the other of the intake side and the exhaust side of the cylinder head side water jacket.
  • the cooling water passage is made to flow through the cylinder head side water jacket, but it is determined which part of the cylinder head side water jacket is connected to the cooling water passage. Since it has not been specified, the cooling water in the cooling water passage cannot be actively sucked into the cylinder head side water jacket, and the effect of the cooling water passage may not be sufficiently exhibited.
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to enhance the cooling effect by a cooling water passage provided between adjacent cylinder bores of an engine.
  • a cylinder bore row comprising a plurality of cylinder bores and a cylinder block-side water jacket surrounding the cylinder bore row are formed inside the cylinder block.
  • a cooling structure of a water-cooled engine in which cooling water is supplied from the cylinder block-side water jacket to the cylinder head-side water jacket by a cooling water pump, and includes at least one cooling water passage that crosses between two adjacent cylinder bores.
  • a water-cooling type characterized in that an inlet end of the cooling water passage communicates with an exhaust side of the cylinder block side water jacket, and an outlet end of the cooling water passage communicates with the cylinder head side water jacket.
  • a part of the cooling water from the cooling water pump does not pass through the cylinder block side water jacket on the intake side of the cylinder head side water jacket.
  • a water-cooling type is provided with a cylinder head side cooling water inlet to be supplied, and an outlet end of the cooling water passage communicates with the cylinder head side water jacket in the vicinity of the cylinder head side cooling water inlet.
  • a sub-water jacket is provided on the intake side of the cylinder block, and the sub-water jacket includes a cylinder block-side cooling water inlet of the cylinder block-side water jacket and the cylinder block-side water jacket. Cooling of a water-cooled engine characterized in that a thermo-valve that communicates with the cylinder head side cooling water inlet and closes at a low temperature is disposed between the subwater jacket and the cylinder block side cooling water inlet. A structure is proposed.
  • the cylinder block side water jacket formed inside the cylinder head is formed inside the cylinder block by forming a cylinder bore row composed of a plurality of cylinder bores and a cylinder block side water jacket surrounding the cylinder bore row.
  • a cooling structure for a water-cooled engine in which cooling water is supplied to the jacket from the cylinder block side water jacket by a cooling water pump, and includes at least one cooling water passage that crosses between two adjacent cylinder bores.
  • the inlet end communicates with one of the intake side and the exhaust side of the cylinder block side water jacket
  • the outlet end of the cooling water passage communicates with the other of the intake side and the exhaust side of the cylinder head side water jacket
  • Some of the cooling water from the pump The other side of the cooling water supplied from the cooling water pump to the other side of the intake side and the exhaust side of the rack side water jacket is not passed through the cylinder block side water jacket and is taken into the intake of the cylinder head side water jacket.
  • a cooling structure for a water-cooled engine is proposed, characterized in that it is supplied to the other of the exhaust side and the exhaust side.
  • a part of the cooling water from the cooling water pump is supplied to the cylinder head side water jacket without going through the cylinder block side water jacket.
  • Cylinder head side cooling water inlet is provided, and an outlet end of the cooling water passage communicates with the cylinder head side water jacket in the vicinity of the cylinder head side cooling water inlet.
  • a sub-water jacket is provided on the other side of the intake side and the exhaust side of the cylinder block, and the sub-water jacket is a cylinder block side of the cylinder block-side water jacket.
  • a sixth feature is that a thermo valve that communicates with the cooling water inlet and the cylinder head side cooling water inlet is disposed between the sub-water jacket and the cylinder block side cooling water inlet at a low temperature.
  • a plurality of first communication holes for supplying cooling water from the sub-water jacket to the cylinder head-side water jacket are provided,
  • a cooling structure for a water-cooled engine is proposed in which the size of the communication hole changes according to the distance from the cooling water inlet of the subwater jacket.
  • a single second communication hole for supplying cooling water from the cylinder block side water jacket to the cylinder head side water jacket is provided. Eight characteristic cooling structures for water-cooled engines are proposed.
  • a cooling structure for a water-cooled engine in which a partition member that inhibits the flow of the cooling water is disposed in the shorter cooling water flow path.
  • the cooling water from the cooling water pump is supplied from the cylinder block side water jacket formed inside the cylinder block to the cylinder head side water jacket formed inside the cylinder head. Cool the cylinder block and cylinder head. Provided with at least one cooling water passage crossing between two adjacent cylinder bores, the inlet end of the cooling water passage communicates with the exhaust side of the cylinder block side water jacket, and the outlet end of the cooling water passage communicates with the cylinder head side water jacket Therefore, in addition to the cooling effect between the cylinder bores, the inlet of the cooling water passage is connected to the cylinder block by flowing the cooling water flowing on the exhaust side of the cylinder block side water jacket through the cooling water passage to the cylinder head side water jacket. As compared with the case where the side water jacket communicates with the intake side, it is possible to prevent the coolant from staying on the exhaust side of the cylinder block side water jacket, which becomes a high temperature, and to enhance the cooling effect of the cylinder block.
  • the cylinder head side cooling is such that a part of the cooling water from the cooling water pump is supplied to the intake side of the cylinder head side water jacket without going through the cylinder block side water jacket.
  • a water inlet is provided, and the outlet end of the cooling water passage communicates with the cylinder head side water jacket in the vicinity of the cylinder head side cooling water inlet, so that it is supplied to the cylinder head side water jacket without going through the cylinder block side water jacket.
  • the cooling water in the cooling water passage can be efficiently sucked up with a large negative pressure at which a high flow rate of cooling water is generated.
  • a sub-water jacket is provided on the intake side of the cylinder block, and the sub-water jacket is provided at each of the cylinder block-side cooling water inlet and the cylinder head-side cooling water inlet of the cylinder block-side water jacket.
  • a thermo valve that closes when the temperature is low is arranged between the sub water jacket and the cylinder block side cooling water inlet, and the cooling valve is closed when the temperature is low to supply cooling water to the cylinder block side water jacket.
  • the cooling water from the cooling water pump is supplied from the cylinder block side water jacket formed inside the cylinder block to the cylinder head side water jacket formed inside the cylinder head.
  • the cylinder block and the cylinder head are cooled. It has at least one cooling water passage that crosses between two adjacent cylinder bores, the inlet end of the cooling water passage communicates with one of the intake side and the exhaust side of the water jacket on the cylinder block side, and the outlet end of the cooling water passage is the cylinder head
  • a portion of the cooling water from the cooling water pump communicates with the other of the intake side and the exhaust side of the side water jacket, and is supplied to the other of the intake side and the exhaust side of the cylinder block side water jacket.
  • the cylinder block side water jacket is moved from the other side of the intake side and the exhaust side. Cooling water from a cooling water pump is directly supplied to the cooling water that has flowed up to a long distance until it reaches a high temperature. In addition to the cooling effect between the cylinder bores, the cylinder block is sucked up to the cylinder head side water jacket through the cooling water passage by a sufficiently large negative pressure generated on the other side of the intake side and exhaust side of the cylinder head side water jacket. The retention of high-temperature cooling water on one of the intake side and the exhaust side of the side water jacket can be prevented to enhance the cooling effect of the cylinder block.
  • the cylinder head side water jacket is provided with a cylinder head side cooling water inlet through which a part of the cooling water from the cooling water pump is supplied without going through the cylinder block side water jacket. Since the outlet end of the cooling water passage communicates with the cylinder head side water jacket in the vicinity of the cylinder head side cooling water inlet, the flow rate supplied to the cylinder head side water jacket without passing through the cylinder block side water jacket The cooling water in the cooling water passage can be efficiently sucked up with a large negative pressure at which high cooling water is generated.
  • a sub-water jacket is provided on the other side of the intake side and the exhaust side of the cylinder block, and the sub-water jacket is provided on the cylinder block side cooling water inlet and the cylinder head side of the cylinder block side water jacket.
  • a thermo-valve that communicates with the cooling water inlet and closes at low temperatures between the sub-water jacket and the cylinder block-side cooling water inlet is arranged. When the temperature is low, the thermo-valve is closed and connected to the cylinder block-side water jacket. By preventing the cooling water from being supplied, the warm-up operation of the engine can be completed promptly.
  • a seventh aspect of the present invention there are provided a plurality of first communication holes for supplying cooling water from the subwater jacket to the cylinder head side water jacket, and the size of the plurality of first communication holes is the size of the subwater jacket. Since it changes according to the distance from the cooling water introduction port, the flow rate of the cooling water that passes through the plurality of first communication holes and is supplied to the cylinder head side water jacket can be made uniform to enhance the cooling effect.
  • the cylinder block side water jacket is provided with a single second communication hole for supplying cooling water from the cylinder block side water jacket to the cylinder head side water jacket.
  • the cooling water supplied to the water jacket can reach all locations on the cylinder block-side water jacket without passing through the second communication hole, and can effectively cool the entire cylinder block.
  • the shorter one of the two cooling water channels of the cylinder block side water jacket formed between the cylinder block side cooling water inlet and the second communication hole is used. Since the partition member that hinders the flow of the cooling water is arranged, the cooling water supplied from the cylinder block side cooling water inlet is short-circuited with the shorter cooling water passage so that it is difficult to flow into the longer cooling water passage. It is blocked by the member, and the cooling water can be appropriately distributed to the two cooling water flow paths.
  • the cooling water inlet 11b of the embodiment corresponds to the cylinder block side cooling water inlet of the present invention
  • the first cooling water inlets 13a, 13b, 13c of the embodiment correspond to the cylinder head side cooling water inlet of the present invention
  • the cylinder head side lower water jacket 15 of the embodiment corresponds to the cylinder head side water jacket of the present invention.
  • FIG. 1 is a diagram showing the shape of the water jacket (core) of the cylinder block and cylinder head and the flow of cooling water.
  • FIG. 2 is a view showing the top surface of the cylinder block, the gasket, and the bottom surface of the cylinder head (viewed in the direction of arrows 2A, 2B, and 2C in FIG. 1).
  • FIG. 3 is a view of the water jacket of the cylinder head as viewed from the exhaust side (viewed in the direction of arrow 3 in FIG. 1).
  • FIG. 4 is a top view of the water jacket of the cylinder head (viewed in the direction of arrow 4 in FIG. 3).
  • FIG. 1 is a diagram showing the shape of the water jacket (core) of the cylinder block and cylinder head and the flow of cooling water.
  • FIG. 2 is a view showing the top surface of the cylinder block, the gasket, and the bottom surface of the cylinder head (viewed in the direction of arrows 2A, 2B, and 2C in FIG. 1).
  • FIG. 5 is a top view of the water jacket of the cylinder head (viewed in the direction of arrow 5 in FIG. 3).
  • FIG. 6 is a view showing the upper surface of the cylinder head side lower water jacket and the lower surface of the cylinder head side upper water jacket.
  • FIG. 7 is a side view of the cylinder block on the exhaust side (seen in the direction of arrow 7 in FIG. 1).
  • First embodiment 8 is a cross-sectional view taken along line 8-8 of FIG.
  • First embodiment 9 is a cross-sectional view taken along line 9-9 of FIG.
  • First embodiment 10 is a cross-sectional view taken along line 10-10 of FIG. (First embodiment)
  • the vertical direction is defined as the cylinder axis direction and the cylinder block side as the lower side, and the cylinder axis direction and the cylinder head side as the upper side, regardless of the mounting orientation of the engine.
  • the water-cooled in-line three-cylinder engine includes a cylinder block 11 and a cylinder head 13 having a bottom surface coupled to a top surface of the cylinder block 11 with a gasket 12 interposed therebetween.
  • the cylinder block 11 includes a cylinder block-side water jacket 14 surrounding the periphery of three cylinder bores arranged in series along the cylinder row line, and the cylinder head 13 is vertically moved with an exhaust manifold (not shown) interposed therebetween.
  • a cylinder head side lower water jacket 15 and a cylinder head side upper water jacket 16 are provided. In the upper left part of FIG.
  • a sub-water jacket 17 extending in the cylinder row line direction is formed on the intake side of the cylinder block 11, and a cooling water introduction port through which cooling water is supplied from the cooling water pump 18 to one end side (# 1 cylinder side). 11a is formed.
  • the cylinder block side water jacket 15 is provided with a cooling water inlet 11b on the intake side of the cylinder bore of the # 2 cylinder, and the cooling water inlet 11b and the sub water jacket 17 are connected via a thermo valve 19.
  • the thermo valve 19 automatically opens and closes depending on the temperature of the cooling water.
  • the thermo valve 19 is closed at a low temperature and shuts off the supply of the cooling water to the cylinder block side water jacket 15 to promote engine warm-up.
  • the cooling of the engine is promoted by opening the valve and permitting the supply of the cooling water to the cylinder block side water jacket 15.
  • the cylinder block side water jacket 14 includes a cooling water outlet 11c that discharges cooling water toward the cylinder head side lower water jacket 15 on the other end side (# 3 cylinder side). Therefore, in the cooling water flow path in which the cooling water supplied to the cooling water inlet 11b of the cylinder block side water jacket 14 flows toward the cooling water outlet 11c, the intake air of the cylinder block side water jacket 14 in FIG. A short flow path that reaches half of the side portion counterclockwise and reaches the cooling water outlet 11c, and the other half of the intake side portion and the exhaust side portion of the cylinder block side water jacket 14 flow clockwise and the cooling water. There is a long channel that reaches the outlet 11c. A partition member 20 for partitioning a part of the cylinder block side water jacket 14 and suppressing the flow of the cooling water is attached to the shorter flow path.
  • the cooling water inlet 11b is connected to the cylinder block side water jacket 14.
  • the supplied cooling water can reach all locations of the cylinder block side water jacket 14 without passing through the cooling water outlet 11c, and the entire cylinder block 11 can be effectively cooled.
  • the partition member 20 Assuming that the partition member 20 is not present, most of the cooling water supplied from the cooling water inlet 11b to the cylinder block water jacket 14 flows through the shorter flow path and reaches the cooling water outlet 11c. There is a possibility that the flow rate of the cooling water flowing through the longer flow path becomes small, and the exhaust side of the cylinder block 11 that becomes high temperature cannot be sufficiently cooled.
  • the partition member 20 is attached to the shorter flow path to restrict the flow rate of the cooling water, so the flow rate of the cooling water flowing through the longer flow path is increased and the temperature becomes high. Cooling of the exhaust side of the cylinder block 11 can be promoted.
  • Two groove-shaped cooling water passages 11d and 11d extending in a direction crossing between the three cylinder bores are formed on the top surface of the cylinder block 11.
  • the inlet side of the cooling water passages 11d and 11d communicates with the exhaust side of the cylinder block side water jacket 14, and the outlet side of the cooling water passages 11d and 11d is a dead end near the intake side of the cylinder block side water jacket 14. .
  • the gasket 12 is formed with three first communication holes 12a, 12b, 12c, one second communication hole 12d, and two third communication holes 12e, 12e.
  • Three cooling water inlets 13e and 13e are formed.
  • the sub-water jacket 17 of the cylinder block 11 is connected to the three first cooling water inlets 13a, 13b, 13c of the cylinder head side lower water jacket 15 through the three first communication holes 12a, 12b, 12c of the gasket 12. Communicate.
  • the three first communication holes 12a, 12b, 12c of the gasket 12 have the smallest opening area of the first communication hole 12a closest to the cooling water inlet 11a of the subwater jacket 17, and the subwater jacket 17
  • the first communication hole 12c farthest from the cooling water introduction port 11a has the largest opening area
  • the first communication hole 12b having a medium distance from the cooling water introduction port 11a of the subwater jacket 17 has a medium opening area. It has.
  • the cooling water that passes through the first communication hole 12a closest to the cooling water inlet 11a of the subwater jacket 17 is used.
  • the flow rate of the cooling water passing through the first communication hole 12c farthest from the cooling water introduction port 11a of the subwater jacket 17 decreases, but the three first communication holes 12a, 12b, and 12c are opened.
  • the cooling water is evenly distributed to the three first cooling water inlets 13a, 13b, 13c of the cylinder head side lower water jacket 15. Can be supplied.
  • the cooling water outlet 11c of the cylinder block side water jacket 14 communicates with the second cooling water inlet 13d of the cylinder head side lower water jacket 15 through the second communication hole 12d of the gasket 12.
  • the intake-side end portions of the two cooling water passages 11d and 11d formed on the top surface of the cylinder block 11 become dead ends through the third communication holes 12e and 12e of the gasket 12, respectively.
  • the jacket 15 communicates with the two third cooling water inlets 13e and 13e.
  • the cylinder head side upper water jacket 16 is about half the size of the cylinder head side lower water jacket 15 and is disposed above the exhaust side of the cylinder head side lower water jacket 15.
  • the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16 are provided with six baseboard portions 21 to 26 projecting outward.
  • the skirting portions 21 to 26 hold a sand core for casting the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16 in the mold when the cylinder head 13 is cast.
  • the skirting portions 21 to 26 become openings that constitute a part of the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16.
  • the ends of the skirting portions 21 to 26 open to the surface of the cylinder head 13, and are blocked by plugs 27 (see FIGS. 7 to 10) in order to prevent leakage of cooling water from that portion.
  • the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16 communicate with each other through the air vent hole 13f inside the baseboard portion 22.
  • the air vent hole 13f is processed by inserting a drill in the horizontal direction from the opening of the skirting board 23 which is a space. In this way, by drilling the air vent hole 13f using the baseboard portion 22, an unnecessary drill hole is prevented from being formed in the cylinder head 13, and a process for closing the drill hole is unnecessary. Thus, the processing of the air vent hole 13f is facilitated.
  • the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16 communicate with each other through the first communication portion 13g in the skirting board portion 23. As shown in FIGS. 4 and 10, the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16 communicate with each other through the second communication portion 13h in the skirting board 24.
  • FIG. 7 both of which are viewed from the exhaust side, as is clear, the recess 15 a on the upper surface on the exhaust side of the cylinder head side lower water jacket 15 and the exhaust of the cylinder head side upper water jacket 16.
  • An exhaust manifold portion 28 of the exhaust manifold extends to the outside from between the concave portion 16a on the lower surface side.
  • a baseboard 22 having an air vent hole 13f formed adjacent to the exhaust collecting portion 28 on the # 3 cylinder side in the cylinder row direction is located adjacent to the exhaust collecting portion 28, and # 1 in the cylinder row direction with respect to the exhaust collecting portion 28.
  • a base board 23 having a first communication part 13g formed on the cylinder side is located adjacent to the cylinder side, and a second communication part 13h is formed on the # 1 cylinder side in the cylinder row direction with respect to the base board part 23.
  • the skirting board part 24 is located adjacently.
  • the cylinder head-side lower water jacket 15 and the cylinder head-side upper water jacket 16 adjacent to the skirting board portion 23 have volume expanding portions 15b and 16b (see FIGS. 3 to 5) that bulge outward in a triangular shape. It is formed. Further, in the portion where the cooling water flow path suddenly descends from the position where the air vent hole 13f of the cylinder head side lower water jacket 15 is provided to the lower part of the recess 15a, the flow passage cross-sectional area is narrowed. The narrowed portion 15c (see FIG. 3) is formed.
  • the cooling water supplied from the cooling water pump 18 to the sub water jacket 17 of the cylinder block 11 passes through the thermo valve 19 from the sub water jacket 17 and is supplied to the cooling water inlet 11 b on the intake side of the cylinder block side water jacket 14.
  • the cooling water branched in two directions at the cooling water inlet 11b flows in the clockwise and counterclockwise directions inside the cylinder block side water jacket 14 and merges at the cooling water outlet 11c, and then passes through the second communication hole 12d of the gasket 12. It passes through and is supplied to the # 3 cylinder side of the cylinder head side lower water jacket 15.
  • the cooling water flowing from the # 1 cylinder side to the # 3 cylinder side inside the sub-water jacket 17 is the first communication holes 12a, 12b, 12c of the gasket 12 and the first cooling water inlets 13a, 13b, 13c of the cylinder head 13. Is supplied to the intake side of the cylinder head side lower water jacket 15 and flows from there through the inside of the cylinder head side lower water jacket 15 toward the exhaust side.
  • the dead ends of the two cooling water passages 11d and 11d whose inlet ends communicate with the exhaust side of the cylinder block-side water jacket 14 are the third communication holes 12e and 12e of the gasket 12 and the third cooling water of the cylinder head 13.
  • the third cooling water inlets 13e and 13e of the cylinder head 13 are communicated with the cylinder head side lower water jacket 15 through the inlets 13e and 13e, and the third cooling water inlets 13a and 13e of the cylinder head 13 are viewed from the first cooling water inlets 13a, 13b and 13c. Therefore, since the cooling water passes over the third cooling water inlets 13e and 13e at a high flow rate, a large negative pressure is generated.
  • the high temperature cooling water on the exhaust side of the cylinder block side water jacket 14 passes through the two cooling water passages 11d and 11d, and the cylinder head side lower water.
  • the exhaust side of the cylinder block 11 that is hotter than the intake side of the cylinder block 11 is effectively cooled. can do.
  • the cooling water flowing directly into the three first cooling water inlets 13a, 13b, 13c of the cylinder head-side lower water jacket 15 It bifurcates so as to detour around and flows from the intake side to the exhaust side.
  • the cooling water supplied from the cooling water outlet 11 c located on the # 3 cylinder side of the cylinder block side water jacket 14 to the second cooling water inlet 13 d of the cylinder head 13 flows to the # 1 cylinder side, and from the sub water jacket 17.
  • the air vent hole 13f is provided so as to short-circuit the cylinder head side lower water jacket 15 and the cylinder head side upper water jacket 16, air bubbles contained in the cooling water flowing through the cylinder head side lower water jacket 15 are removed from the air vent hole. It is possible to prevent air bubbles from remaining in the cylinder head side lower water jacket 15 by passing through 13f and discharged to the cylinder head side upper water jacket 16.
  • the air vent hole 13f is provided at the highest position of the cylinder head side lower water jacket 15, and on the downstream side of the air vent hole 13f in the flow direction of the cooling water, Since the concave portion 15a of the jacket 15 is located, the flow path of the cooling water flowing from the # 3 cylinder side to the # 1 cylinder side on the exhaust side of the cylinder head side lower water jacket 15 rapidly rises toward the air vent hole 13f. Later, it will fall rapidly and then rise again suddenly. As a result, bubbles easily gather below the air vent hole 13f, and the accumulated bubbles are smoothly discharged from the cylinder head side lower water jacket 15 to the cylinder head side upper water jacket 16 through the air vent hole 13f.
  • a throttle portion 15c in which the cross-sectional area of the flow path is reduced between the portion provided with the air vent hole 13f and the lower portion of the exhaust collecting portion 28. Therefore, by increasing the flow rate of the cooling water in the vicinity of the exhaust collecting portion 28 by the throttle portion, the cooling effect of the exhaust collecting portion 28 that becomes high temperature can be enhanced.
  • the cooling water that has passed under the recess 15a is supplied from the cylinder head-side lower water jacket 15 to the cylinder head-side upper water jacket 16 through the first communication portion 13g and the second communication portion 13h.
  • the first communication portion 13g on the upstream side in the flow direction collects cooling water from the multiple flow paths of the cylinder head side lower water jacket 15 compared to the second communication portion 13h on the downstream side in the flow direction of the cooling water.
  • the flow of the cooling water is stagnated in the vicinity of the first communication portion 13g, and the flow rate of the cooling water in the flow path on the upstream side of the first communication portion 13g is greater than the flow rate of the cooling water in the flow path on the upstream side of the second communication portion 13h Can also be slow.
  • the volume expansion portions 15b and 16b (see FIGS. 3 to 5) in which the volume of the flow path of the cooling water is increased are provided in the vicinity of the first communication portion 13g on the upstream side,
  • the volume expansion portions 15b and 16b eliminate the stagnation of the flow of the cooling water in the vicinity of the first communication portion 13g, and a sufficient amount of cooling water can pass through the first communication portion 13g.
  • a decrease in the flow rate of the cooling water in the flow path upstream of the first communication portion 13g is prevented, and the flow rate of the cooling water flowing in each flow path of the cylinder head side lower water jacket 15 is made uniform, thereby improving the cooling performance. improves.
  • the flow path of the cooling water suddenly descends and then rapidly rises below the recess 15a of the cylinder head side lower water jacket 15, there is a possibility that the smooth flow of cooling water may be obstructed. Since the volume expansion portions 15b and 16b in which the volume of the flow path expands are formed on the downstream side in the flow direction of the cooling water, the cooling water can smoothly pass under the recess 15a of the cylinder head side lower water jacket 15. Thus, the high temperature exhaust collecting portion 28 can be effectively cooled.
  • the engine of the embodiment is an in-line three-cylinder engine
  • the number and arrangement of the engine cylinders are not limited to those of the embodiment.
  • the inlet end of the cooling water passage 11d communicates with the exhaust side of the cylinder block side water jacket 14 and the outlet end communicates with the intake side of the cylinder head side lower water jacket 15.
  • the communication relationship may be reversed so that the inlet end of the cooling water passage 11d communicates with the intake side of the cylinder block side water jacket 14 and the outlet end communicates with the exhaust side of the cylinder head side lower water jacket 15. .
  • the cylinder head-side water jacket includes the cylinder head-side lower water jacket 15 and the cylinder head-side upper water jacket 16, but the cylinder head-side upper water jacket 16 is not necessarily required.

Abstract

Selon l'invention, de l'eau de refroidissement provenant d'une pompe à eau de refroidissement est apportée d'une chemise d'eau côté bloc-cylindres formée à l'intérieur d'un bloc-cylindres à une chemise d'eau côté culasse formée à l'intérieur d'une culasse pour ainsi refroidir le bloc-cylindres et la culasse. Il est prévu au moins un conduit d'eau de refroidissement qui traverse l'espace situé entre deux alésages de cylindre adjacents; une extrémité d'entrée du conduit d'eau de refroidissement communique avec un côté échappement de la chemise d'eau côté bloc-cylindres; et une extrémité de sortie du conduit d'eau de refroidissement communique avec la chemise d'eau côté culasse par distribution à cette dernière, par le biais du conduit d'eau de refroidissement, de l'eau de refroidissement qui s'écoule à travers le côté échappement de la chemise d'eau côté bloc-cylindres. Outre l'effet de refroidissement qui se produit entre les alésages de cylindres, la rétention de l'eau de refroidissement sur le côté échappement de la chemise d'eau côté bloc-cylindres, qui atteint des températures élevées, peut être empêchée et l'effet de refroidissement du bloc-cylindres augmenté davantage que si l'extrémité d'entrée du conduit d'eau de refroidissement était amenée à communiquer avec un côté entrée de la chemise d'eau côté bloc-cylindres.
PCT/JP2015/080043 2015-10-23 2015-10-23 Structure de refroidissement pour moteur refroidi à l'eau WO2017068732A1 (fr)

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DE112015007045.1T DE112015007045B4 (de) 2015-10-23 2015-10-23 Kühlstruktur eines wassergekühlten motors
JP2017546384A JP6475360B2 (ja) 2015-10-23 2015-10-23 水冷式エンジンの冷却構造
CN201580083974.3A CN108138687B (zh) 2015-10-23 2015-10-23 水冷式发动机的冷却构造

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CN114320648B (zh) * 2021-12-28 2023-04-07 安徽江淮汽车集团股份有限公司 一种汽车发动机缸盖水套

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CN108138687B (zh) 2020-10-16
JPWO2017068732A1 (ja) 2018-08-16

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