WO2020196375A1 - 内燃機関の冷却構造 - Google Patents

内燃機関の冷却構造 Download PDF

Info

Publication number
WO2020196375A1
WO2020196375A1 PCT/JP2020/012640 JP2020012640W WO2020196375A1 WO 2020196375 A1 WO2020196375 A1 WO 2020196375A1 JP 2020012640 W JP2020012640 W JP 2020012640W WO 2020196375 A1 WO2020196375 A1 WO 2020196375A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
cooling jacket
control valve
block
cooling fluid
Prior art date
Application number
PCT/JP2020/012640
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
正樹 長
美博 ▲高▼田
功 東垣外
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2021509372A priority Critical patent/JP7075538B2/ja
Publication of WO2020196375A1 publication Critical patent/WO2020196375A1/ja

Links

Images

Classifications

    • 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 block having a cylinder bore is provided with a block-side cooling jacket arranged around the cylinder bore, and a combustion chamber facing the top of a piston slidably fitted to the cylinder bore is referred to as the cylinder block.
  • the cylinder head formed between the two and coupled to the cylinder block is provided with a head-side cooling jacket arranged around the combustion chamber, and the cooling fluid flows through the block-side cooling jacket and the head-side cooling jacket. It relates to a cooling structure of an internal combustion engine.
  • Patent Document 1 discloses a cooling structure of an internal combustion engine that adjusts the flow direction and flow rate of a cooling fluid in a cooling jacket provided on a cylinder block so as to be arranged around a plurality of cylinder bores arranged in parallel.
  • a valve discharges the cooling fluid from the block-side cooling jacket while allowing the cooling fluid to be supplied in parallel to the block-side cooling jacket provided on the cylinder block and the head-side cooling jacket provided on the cylinder head.
  • Patent Document 2 A cooling structure of an internal combustion engine is known in Patent Document 2 in which the amount of cooling fluid flowing through the block-side cooling jacket is controlled by control.
  • the present invention has been made in view of the above circumstances, and provides a cooling structure for an internal combustion engine in which the flow of the cooling fluid of the block-side cooling jacket provided in the cylinder block is variably controlled to improve the lubrication efficiency.
  • the purpose is to do.
  • the present invention provides a block-side cooling jacket arranged around the cylinder bore in a cylinder block having a cylinder bore, and faces the top of a piston slidably fitted to the cylinder bore.
  • a head-side cooling jacket arranged around the combustion chamber is provided on a cylinder head formed with a combustion chamber between the cylinder block and the cylinder head, and the block-side cooling jacket and the head are provided.
  • cooling by the block side cooling jacket is performed in a cooling fluid passage that guides the cooling fluid from the head side cooling jacket to the block side cooling jacket side.
  • the first feature is that a control valve for controlling the flow of fluid is provided.
  • the block-side cooling jacket is divided in a direction along the axis of the cylinder bore and from a plurality of divided cooling jackets that can communicate with each other in the cooling fluid passage.
  • the second feature is that it is formed.
  • the linear passage portion which constitutes a part of the cooling fluid passage and extends parallel to the axis of the cylinder bore, the axial direction of the linear passage portion.
  • the third feature is that the control valve extending to is inserted.
  • the fourth feature of the present invention is that, in addition to any of the configurations of the first to third features, the control valve is provided with a notch in the rod-shaped control valve main portion.
  • control valve is connected to an actuator capable of moving the control valve in the axial direction of the linear passage portion. It is a feature of.
  • control valve in addition to the configuration of the second or third feature, is connected to an actuator capable of rotating the control valve around the axis in the linear passage portion. It is a feature.
  • a control valve for controlling the flow of the cooling fluid in the block side cooling jacket is provided in the cooling fluid passage that guides the cooling fluid from the head side cooling jacket to the block side cooling jacket side. Therefore, it is possible to control the flow of the cooling fluid in the block-side cooling jacket according to the operating state including the starting state of the internal combustion engine, and the temperature of the cylinder block is appropriately controlled according to the operating state to achieve lubrication efficiency. Can be improved.
  • the block-side cooling jacket is composed of a plurality of divided cooling jackets that are divided in the direction along the axis of the cylinder bore and can communicate with each other, a plurality of cooling jackets along the axis of the cylinder bore are formed.
  • the temperature at the site can be changed according to the operating condition.
  • the control valve extending in the axial direction of the passage portion is inserted into the linear passage portion which is arranged parallel to the axis of the cylinder bore and forms a part of the cooling fluid passage. ,
  • the arrangement of the control valve becomes simple.
  • the structure of the control valve can be simplified by configuring the control valve so that the rod-shaped control valve main portion is provided with a notch.
  • the cooling fluid can be controlled with a simple structure by moving the control valve in the axial direction of the linear passage portion by the actuator.
  • the cooling fluid can be controlled with a simple structure by rotating the control valve in the linear passage portion by the actuator.
  • FIG. 1 is a vertical sectional view of a main part of the internal combustion engine according to the first embodiment.
  • FIG. 2 is a diagram showing a configuration of a cooling system of the engine body.
  • FIG. 3 is a cross-sectional view taken along the line aa of FIG. 1 when the internal combustion engine is started.
  • FIG. 4 is a sectional view taken along line bb of FIG. 1 when the internal combustion engine is started.
  • FIG. 5 is a diagram showing the operating state of the control valve at the start state of the internal combustion engine through the block side cooling jacket and the cooling fluid passage.
  • FIG. 1 is a vertical sectional view of a main part of the internal combustion engine according to the first embodiment.
  • FIG. 2 is a diagram showing a configuration of a cooling system of the engine body.
  • FIG. 3 is a cross-sectional view taken along the line aa of FIG. 1 when the internal combustion engine is started.
  • FIG. 4 is a sectional view taken along line bb of FIG. 1 when the
  • FIG. 6 is a diagram showing simplified cross sections along lines aa, bb, and cc of FIG. 1 at the time of starting the internal combustion engine with (a), (b), and (c). .. (First Embodiment)
  • FIG. 7 is a diagram showing simplified cross sections along lines aa, bb, and cc of FIG. 1 during medium load operation of an internal combustion engine, as shown by (a), (b), and (c).
  • FIG. 8 is a diagram showing simplified cross sections along lines aa, bb, and cc of FIG. 1 during high-load operation of an internal combustion engine, as shown by (a), (b), and (c). Is. (First Embodiment) FIG.
  • FIG. 9 is a vertical cross-sectional view of a main part of the internal combustion engine of the second embodiment.
  • FIG. 10 is a diagram showing the operating state of the control valve at the start state of the internal combustion engine through the block side cooling jacket and the cooling fluid passage.
  • FIG. 11 is a perspective view of the control valve as viewed from the side opposite to that of FIG.
  • FIG. 12 is a diagram showing simplified cross sections taken along the lines aa and bb of FIG. 9 when the internal combustion engine is started, as shown in (a) and (b).
  • FIG. 13 is a diagram showing simplified cross sections taken along the lines aa and bb of FIG. 9 during high-load operation of the internal combustion engine in FIGS. 9A and 13B.
  • the internal combustion engine EA is mounted on, for example, a motorcycle, and the engine body 11A is a crankcase (not shown).
  • a cylinder block 12 that is tilted forward and coupled to the crankcase while mounted on a motorcycle, a cylinder head 13 that is coupled to the cylinder block 12, and a head cover 14 that is coupled to the cylinder head 13. It has and is configured as a single cylinder.
  • the cylinder block 12 has an axis C that is inclined forward when mounted on a motorcycle, and also has a cylinder bore 16 that slidably fits the piston 15. Combustion that faces the top of the piston 15.
  • a chamber 17 is formed between the cylinder block 12 and the cylinder head 13.
  • An intake port 18 that can communicate with the combustion chamber 17 is provided on the rear side wall 13a of the cylinder head 13, a throttle body 21 is connected to the intake port 18 via an insulator 20, and fuel is supplied to the throttle body 21.
  • An injection valve 22 is attached.
  • the front side wall 13b of the cylinder head 13 is provided with an exhaust port 19 that can communicate with the combustion chamber 17.
  • the cylinder head 13 includes an intake valve 24 that controls the intake amount from the intake port 18 to the combustion chamber 17, and an exhaust valve 25 that controls the exhaust amount from the combustion chamber 17 to the exhaust port 19. , Each is arranged so that it can be opened and closed while being spring-forced on the valve closing side.
  • the intake valve 24 is opened and closed by an intake side valve device 26 arranged between the cylinder head 13 and the head cover 14, and the intake side valve device 26 is a valve shaft of the intake valve 24.
  • An intake valve side cap 27 that comes into contact with the portion 24a and is slidably fitted to the cylinder head 13 and an intake side camshaft 28 that is rotatably supported by the cylinder head 13 are provided.
  • the camshaft 28 is provided with an intake side cam 29 that is in sliding contact with the intake valve side cap 27.
  • the exhaust valve 25 is opened and closed by an exhaust side valve device 30 arranged between the cylinder head 13 and the head cover 14, and the exhaust side valve device 30 is a valve of the exhaust valve 25.
  • An exhaust valve side cap 31 that comes into contact with the shaft portion 25a and is slidably fitted to the cylinder head 13 and an exhaust side camshaft 32 that is rotatably supported by the cylinder head 13 are provided.
  • the side camshaft 32 is provided with an exhaust side cam 33 that is in sliding contact with the exhaust valve side cap 31.
  • the engine body 11A has a cooling jacket 34 for cooling the engine body 11A by the flow of a cooling fluid such as water or gas, and the cooling jacket 34 has the cylinder bore.
  • a block-side cooling jacket 35 provided on the cylinder block 12 so as to be arranged around the 16 and a head-side cooling jacket 36 provided on the cylinder head 13 so as to be arranged around the combustion chamber 17.
  • a cooling fluid such as water or gas
  • the cooling fluid discharged from the cooling fluid circulation pump 37 that circulates the cooling fluid is supplied to the head-side cooling jacket 36, and is cooled from the head-side cooling jacket 36 to the block-side cooling jacket 35 via the cooling fluid passage 38. Although the fluid is guided, the flow of the cooling fluid to the block-side cooling jacket 35 is controlled by the control valve 39 provided in the cooling fluid passage 38, and the cooling fluid after being controlled by the control valve 39 is a radiator. It is returned to the cooling fluid circulation pump 37 via 40.
  • the cooling fluid passage 38 guides the cooling fluid from the head-side cooling jacket 36 to the block-side cooling jacket 35 side, and at least the cooling fluid passage 38.
  • a part is provided on the cylinder block 12 and the cylinder head 13.
  • the block-side cooling jacket 35 is composed of a plurality of divided cooling jackets that are divided in the direction along the axis C of the cylinder bore 16 and that can communicate with each other in the cooling fluid passage 38.
  • the first divided cooling jacket 35a, the second divided cooling jacket 35b, and the third divided cooling jacket 35c arranged in order from the cylinder head 13 side in the direction along the axis C of the cylinder bore 16 are formed in a ring shape surrounding the cylinder bore 16.
  • the cylinder block 12 is provided so as to be evenly spaced from each other.
  • the cylinder block 12 has a structure having a hollow space by having the above-mentioned first to third divided cooling jackets 35a, 35b, 35c, and is manufactured by using a 3D printer or the like, and the first to third divided cooling jackets 35a.
  • the cylinder block 12 having the first to third divided cooling jackets 35a, 35b, 35c can be formed.
  • the cooling fluid passage 38 traverses a part of the first split cooling jacket 35a, the second split cooling jacket 35b, and the third split cooling jacket 35c in the circumferential direction, and the cylinder bore 16 In the first split cooling jacket 35a while guiding the cooling fluid from the head side cooling jacket 36 and the linear passage portion 38a provided in the cylinder block 12 and the cylinder head 13 extending in parallel with the axis C of the above.
  • An introduction passage 38b whose downstream end opens on the inner surface of the linear passage 38a at a corresponding position, and one end on the inner surface of the linear passage 38a at a position facing the opening end of the introduction passage 38b.
  • a first detour passage that opens and extends so as to bypass a part of the linear passage portion 38a and opens the other end portion on the inner surface of the linear passage portion 38a at a portion corresponding to the second split cooling jacket 35b.
  • One end is opened on the inner surface of the linear passage 38a at a position facing the other end opening of the first detour passage 38c and the portion 38c, and extends so as to bypass a part of the linear passage 38a.
  • the second detour passage portion 38d that opens the other end portion on the inner surface of the linear passage portion 38a at the portion corresponding to the third division cooling jacket 35c and the other end opening portion of the second detour passage portion 38d are opposed to each other. It is composed of a discharge passage portion 38e that opens one end on the inner surface of the linear passage portion 38a at such a position, and the other end of the discharge passage portion 38e is connected to the radiator 40.
  • the introduction passage portion 38b, the first detour passage portion 38c, the second detour passage portion 38d, and the discharge passage portion 38e are such that at least a part of 38b, 38c, 38d, 38e is the cylinder block 12 and the cylinder. It may be composed of a conduit separate from the head 13.
  • the control valve 39 constitutes a part of the cooling fluid passage 38 and extends in the axial direction of the linear passage portion 38a extending in parallel with the axis C of the cylinder bore 16, and is inside the linear passage portion 38a. Will be inserted into.
  • the control valve 39 is formed by providing first, second and third notches 41, 42 and 43 in a rod-shaped control valve main portion 39a, and the first and second notches 41 are provided. , 42 are arranged on both sides of the one-diameter line DL1 of the control valve main portion 39a so as to cut out a part of the control valve main portion 39a in an arc shape. Further, the third notch 43 is formed so as to cut out a half portion of the control valve main portion 39a in the direction along the one-diameter line DL1.
  • the control valve 39 having such a shape may be manufactured by using a 3D printer or the like.
  • the first and second notches 41 and 42 have a first predetermined length L1 in a direction along the axis of the control valve main portion 39a from the end portion of the control valve main portion 39a on the cylinder head 13 side.
  • the first predetermined length L1 is formed so as to have, and the first predetermined length L1 is opposite to the cylinder head 13 of the third divided cooling jacket 35c from the end portion of the first divided cooling jacket 35a on the cylinder head 13 side. It is set to the length to the end of the side.
  • the third notch 43 is spaced from the first notch 41 and the second notch 42 by a second predetermined length L2 in a direction along the axis of the control valve main portion 39a. It is arranged at a position farther from the cylinder head 13 than the first and second notches 41 and 42 at the above position, and has a third predetermined length L3 in the direction along the axis of the control valve main portion 39a. It is formed on the control valve main portion 39a.
  • the second predetermined length L2 is the spacing between the first split cooling jacket 35a and the second split cooling jacket 35b, and the spacing between the second split cooling jacket 35b and the third split cooling jacket 35c. It is set corresponding to.
  • the third predetermined length L3 is a length from the end of the second divided cooling jacket 35b on the side opposite to the cylinder head 13 to the end of the third divided cooling jacket 35c on the opposite side of the cylinder head 13. Is set to.
  • the control valve 39 is arranged so that the one-diameter line DL1 of the control valve main portion 39a is located along the radial direction of the first to third divided cooling jackets 35a, 35b, 35c having a ring shape. It is inserted into the linear passage portion 38a.
  • the first notch 41 and the second notch 42 are present only at positions corresponding to the first divided cooling jacket 35a in the linear passage portion 38a, and the third notch 43 is the second.
  • the split cooling jacket 35b and the third split cooling jacket 35c are located at positions corresponding to the split cooling jacket 35c, one location in the circumferential direction of the first split cooling jacket 35a is the control, as clearly shown in FIGS. 3 and 6A.
  • the introduction passage portion 38b of the cooling fluid passage 38 is communicated with the peripheral end portion of the first divided cooling jacket 35a in a blocked state by the valve main portion 39a via the first notch 41.
  • the other end in the circumferential direction of the first divided cooling jacket 35a is communicated with one end of the first detour passage 38c in the cooling fluid passage 38 via the second notch 42.
  • the second divided cooling jacket 35b is blocked from the cooling fluid passage 38 by the control valve main portion 39a, and the first detour passage portion 38c and the second detour passage 38c.
  • the portion 38d is communicated through the third notch 43.
  • the third divided cooling jacket 35c is blocked from the cooling fluid passage 38 by the control valve main portion 39a, and the second detour passage portion 38d and the discharge passage portion 38e are separated from each other. It is communicated through the third notch 43.
  • the first notch 41 and the second notch 42 are located in the linear passage portion 38a at positions corresponding to the first divided cooling jacket 35a and the second divided cooling jacket 35b, and the third divided cooling is performed.
  • the third notch 43 is present at a position corresponding to the jacket 35c, as shown in FIG. 7A, one location in the circumferential direction of the first divided cooling jacket 35a is blocked by the control valve main portion 39a.
  • One end in the circumferential direction of the first divided cooling jacket 35a in a blocked state is communicated with the introduction passage portion 38b via the first notch 41, and the circumferential direction of the first divided cooling jacket 35a and the like. The end is communicated with the second notch 42. Further, as shown in FIG.
  • one location in the circumferential direction of the second split cooling jacket 35b is blocked by the control valve main portion 39a, and one end in the circumferential direction of the second split cooling jacket 35b in the blocked state.
  • the first split cooling jacket 35a is communicated through the second notch 42, and the other end in the circumferential direction of the second split cooling jacket 35b is one end of the second detour passage portion 38d via the first notch 41. Is communicated with.
  • the third split cooling jacket 35c is blocked from the linear passage portion 38a by the control valve main portion 39a, and the second detour passage portion 38d is cut off from the third cut. It is communicated with the discharge passage portion 38e via the notch 43.
  • one location in the circumferential direction of the second split cooling jacket 35b is cut off by the control valve main portion 39a, and one end in the circumferential direction of the second split cooling jacket 35b in the cut state.
  • the first split cooling jacket 35a is communicated through the second notch 42, and the other end in the circumferential direction of the second split cooling jacket 35b is one end of the second detour passage portion 38d via the first notch 41. Is communicated with.
  • one location in the circumferential direction of the third divided cooling jacket 35c is cut off by the control valve main portion 39a, and one end in the circumferential direction of the third divided cooling jacket 35c in the blocked state.
  • the first divided cooling jacket 35a and the second divided cooling jacket 35b are communicated with each other through the first notch 41, and the other end of the third divided cooling jacket 35c in the circumferential direction is connected to one end of the discharge passage portion 38e. Be communicated.
  • an actuator 44 capable of moving the control valve 39 in the linear passage portion 38a in the axial direction is connected to the control valve 39, and the actuator 44 is, for example, a wax whose volume is changed according to temperature. It may be made of a material containing a thermosoft material such as, or may have an electric motor.
  • the control valve 39 is driven by the actuator 44, so that when the internal combustion engine EA is started, the first and second notches 41 are shown in FIGS. 6A, 6B, and 6C. , 42 correspond to the first split cooling jacket 35a and the third notch 43 corresponds to the second and third split cooling jackets 35b, 35c.
  • FIG. 7 As shown by a), (b), and (c), the first and second notches 41 and 42 correspond to the first and second divided cooling jackets 35a and 35b, and the third notch 43 is the third.
  • the position corresponds to the 3-split cooling jacket 35c, and during high-load operation of the internal combustion engine EA, the first and second notches 41 and 42 are shown in FIGS. 8 (a), 8 (b) and 8 (c). Is the position corresponding to the first, second and third divided cooling jackets 35a, 35b and 35c.
  • the cooling fluid derived from the head side jacket 36 circulates only in the first divided cooling jacket 35a of the block side jacket 35, and the second and third divided cooling jackets 35b and 35c. Will be bypassed, and during the medium load operation of the internal combustion engine EA, the cooling fluid derived from the head side jacket 36 flows only through the first and second split cooling jackets 35a and 35b of the block side jacket 35. Then, the third split cooling jacket 35c is bypassed, and during the high load operation of the internal combustion engine EA, the cooling fluid derived from the head side jacket 36 is the first, second and second of the block side jacket 35.
  • the three-piece cooling jackets 35a, 35b, and 35c will be distributed in order.
  • the block-side cooling jacket 35 is divided in a direction along the axis C of the cylinder bore 16 included in the cylinder block 12, and a plurality of divided cooling jackets that can communicate with each other in the cooling fluid passage 38, in this embodiment. Since it is composed of the first, second and third divided cooling jackets 35a, 35b and 35c, the temperature at a plurality of portions along the axis C of the cylinder bore 16 can be changed according to the operating state.
  • control valve 39 extending in the axial direction of the linear passage 38a is inserted into the linear passage 38a which constitutes a part of the cooling fluid passage 38 and extends parallel to the axis C of the cylinder bore 16. Therefore, the arrangement of the control valve 39 becomes simple.
  • control valve 39 is simplified by providing the control valve main portion 39a, which has a rod shape, with first, second and third notches 41, 42 and 43. Can be done.
  • the actuator 44 capable of moving the control valve 39 in the axial direction of the linear passage portion 38a is connected to the control valve 39, the cooling fluid can be controlled with a simple structure.
  • FIGS. 9 to 13 A second embodiment of the present invention will be described with reference to FIGS. 9 to 13, but the parts corresponding to the first embodiment are only shown with the same reference numerals and are detailed. The description is omitted.
  • the engine body 11B of the internal combustion engine EB has a cooling jacket 48 for cooling the engine body 11B by the flow of a cooling fluid such as water or gas, and the cooling jacket 48 is the cylinder bore 16.
  • a block-side cooling jacket 49 provided on the cylinder block 12B so as to be arranged around the combustion chamber 17 and a head-side cooling jacket 36 provided on the cylinder head 13 so as to be arranged around the combustion chamber 17 are provided.
  • the cooling fluid discharged from the cooling fluid circulation pump 37 (see the first embodiment) that circulates the cooling fluid is supplied to the head-side cooling jacket 36, and the head-side cooling is performed.
  • the cooling fluid is guided from the jacket 36 to the block-side cooling jacket 49 side via the cooling fluid passage 50, and the flow of the cooling fluid to the block-side cooling jacket 49 is a control valve 51 provided in the cooling fluid passage 50.
  • the cooling fluid which is controlled by the control valve 51 and then controlled by the control valve 51, is returned to the cooling fluid circulation pump 37 via the radiator 40 (see the first embodiment).
  • the cooling fluid passage 50 guides the cooling fluid from the head-side cooling jacket 36 to the block-side cooling jacket 49 side, and at least a part of the cooling fluid passage 50 is the cylinder block 12B and the cylinder head. It is provided in 13.
  • the block-side cooling jacket 49 is composed of a plurality of divided cooling jackets that are divided along the axis C of the cylinder bore 16 and that can communicate with each other in the cooling fluid passage 50.
  • the block-side cooling jacket 49 is composed of a plurality of divided cooling jackets.
  • the first split cooling jacket 49a and the second split cooling jacket 49b which are arranged in order from the cylinder head 13 side in the direction along the axis C of the cylinder bore 16, are formed in a ring shape surrounding the cylinder bore 16 and are evenly spaced from each other. It is provided on the cylinder block 12B so as to be open.
  • the cylinder block 12B has a structure having a hollow space by having the above-mentioned first and second divided cooling jackets 49a and 49b, and is manufactured by using a 3D printer or the like, and the first and second divided cooling jackets 49a and 49b. By casting a member that constitutes a space corresponding to the above, the cylinder block 12B having the first and second divided cooling jackets 49a and 49b can be formed.
  • the cooling fluid passage 50 extends in parallel with the axis C of the cylinder bore 16 while traversing a part of the circumferential direction of the first divided cooling jacket 49a and the second divided cooling jacket 49b, and the cylinder block 12B and the said. Downstream to the inner surface of the linear passage portion 50a at a position corresponding to the first divided cooling jacket 49a while guiding the cooling fluid from the head side cooling jacket 36 and the linear passage portion 50a provided on the cylinder head 13.
  • the discharge passage portion 50c is composed of an introduction passage portion 50b having an open end portion and a discharge passage portion 50c having one end opened on the inner surface of the linear passage portion 50a at a portion corresponding to the second divided cooling jacket 49b.
  • the other end of the radiator 40 is connected to the radiator 40.
  • At least a part of the introduction passage portion 50b and the discharge passage portion 50c may be formed of a conduit separate from the cylinder block 12B and the cylinder head 13.
  • the control valve 51 constitutes a part of the cooling fluid passage 50 and extends in the axial direction of the linear passage portion 50a extending in parallel with the axis C of the cylinder bore 16, and is inside the linear passage portion 50a. Will be inserted into.
  • control valve 51 is provided with fourth to eighth notches 52, 53, 54, 55, 56 and a passage hole 57 in a rod-shaped control valve main portion 51a. It may be manufactured by using, for example, a 3D printer or the like.
  • the fourth and fifth notches 52 and 53 have a fan-shaped cross-sectional shape and are arranged on both sides of the one-diameter line DL2 of the control valve main portion 51a.
  • the sixth and seventh notches 54 and 55 are such that the sixth notch 54 is adjacent to the fifth notch 53 and the seventh notch 55 is adjacent to the fourth notch 52. It has a fan-shaped cross-sectional shape and is arranged on both sides of the one-diameter line DL2.
  • the eighth notch 56 is controlled at a position spaced axially from the sixth notch 54 while having a fan-shaped cross-sectional shape corresponding to the sixth notch 54. It is provided on the valve main portion 51a.
  • the fourth notch 52, the fifth notch 53, and the sixth notch 54 are formed in the first divided cooling jacket of the block-side cooling jacket 49 in the axial direction of the control valve main portion 51a. It is arranged at a position corresponding to the above, and is formed so as to have a length corresponding to the first divided cooling jacket 49a in the axial direction of the control valve main portion 51a. Further, the seventh notch 55 is formed from the end of the first divided cooling jacket 49a on the side of the cylinder head 13 to the second divided cooling jacket with the cylinder head 13 of 49b in the axial direction of the control valve main portion 51a.
  • the eighth notch 56 is arranged at a position corresponding to 49a in the second split cooling jacket in the axial direction of the control valve main portion 51a. It is formed so as to have a length corresponding to the second split cooling jacket 49b in the axial direction of the control valve main portion 51a.
  • one end 57a of the passage hole 57 is opened in the fifth notch 53, and the other end 57b of the passage hole 57 is opened on the outer periphery of the control valve main portion 51a.
  • the other end 57b of the passage hole 57 is a position corresponding to the fourth notch 52 in the circumferential direction of the control valve main portion 51a, and the second end portion 57b in the axial direction of the control valve main portion 51a. It is arranged at a position corresponding to the split cooling jacket 49b.
  • control valve 51 is connected to an actuator 58 capable of rotating the control valve 51 around the axis in the linear passage portion 50a, and the actuator 58 changes the volume according to, for example, the temperature. It may be composed of a material containing a heat-soft material such as wax, or may have an electric motor.
  • the control valve 51 is driven by the actuator 58, and when the internal combustion engine EB is started, the fourth and fifth notches 52 and 53 are made into the fourth and fifth notches 52 and 53 as shown in FIGS. 12 (a) and 12 (b). It corresponds to the 1-split cooling jacket 49a and is a position where a part of the 2nd split cooling jacket 49b in the circumferential direction is blocked by the control valve main portion 51a.
  • the cooling fluid from the head-side cooling jacket 36 flows from the introduction passage portion 50b through the fourth notch 52 in the first divided cooling jacket 49a, and from the fifth notch 53 through the passage hole 57. It will flow to the discharge passage portion 50c side. That is, when the internal combustion engine EB is started, the cooling fluid derived from the head side jacket 36 circulates only in the first division cooling jacket 49a of the block side jacket 49, and the second division cooling jacket 49b is bypassed. ..
  • the control valve 51 is rotated 180 degrees from the starting position by the actuator 58, and as shown in FIGS. 13A and 13B, the sixth notch is formed.
  • the 54 corresponds to the first divided cooling jacket 49a
  • the seventh notch 55 corresponds to the first and second divided cooling jackets 49a and 49b
  • the eighth notch 56 corresponds to the second divided cooling jacket 49b. It will be the position to let.
  • the cooling fluid from the head-side cooling jacket 36 is supplied from the introduction passage portion 50b to the fourth notch 52, the first divided cooling jacket 49a, the seventh notch 55, the second divided cooling jacket 49b, and the eighth. It will flow into the discharge passage 50c through the notch 56. That is, during high-load operation of the internal combustion engine EB, the cooling fluid derived from the head-side jacket 36 circulates in order through the first and second split cooling jackets 49a and 49b of the block-side jacket 49.
  • the block side cooling jacket 35 is divided into the first to third divided cooling jackets 35a, 35b, 35c, and the block side cooling jacket 49 is divided into the first and second divided cooling jackets 49a, 49b.
  • it may be divided into four or more divided cooling jackets.
  • the plurality of divided cooling jackets may be constantly communicated with each other through a small flow cooling fluid passage with a reduced flow rate.

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)
PCT/JP2020/012640 2019-03-26 2020-03-23 内燃機関の冷却構造 WO2020196375A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021509372A JP7075538B2 (ja) 2019-03-26 2020-03-23 内燃機関の冷却構造

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019057899 2019-03-26
JP2019-057899 2019-03-26

Publications (1)

Publication Number Publication Date
WO2020196375A1 true WO2020196375A1 (ja) 2020-10-01

Family

ID=72610941

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/012640 WO2020196375A1 (ja) 2019-03-26 2020-03-23 内燃機関の冷却構造

Country Status (2)

Country Link
JP (1) JP7075538B2 (enrdf_load_stackoverflow)
WO (1) WO2020196375A1 (enrdf_load_stackoverflow)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS624673U (enrdf_load_stackoverflow) * 1985-06-25 1987-01-12
JPH0319424U (enrdf_load_stackoverflow) * 1989-07-06 1991-02-26
JP2001152851A (ja) * 1999-11-26 2001-06-05 Honda Motor Co Ltd エンジンのシリンダ壁温制御装置
US20130047940A1 (en) * 2011-08-23 2013-02-28 Ford Global Technologies, Llc Cooling system and method
WO2018096712A1 (ja) * 2016-11-22 2018-05-31 伸和コントロールズ株式会社 流量制御用二方弁及びこれを用いた温度制御装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3019424U (ja) 1995-06-14 1995-12-19 誠光 土屋 梁掃除用具
US10161290B2 (en) 2015-10-27 2018-12-25 Ford Global Technologies, Llc Cooling system for an internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS624673U (enrdf_load_stackoverflow) * 1985-06-25 1987-01-12
JPH0319424U (enrdf_load_stackoverflow) * 1989-07-06 1991-02-26
JP2001152851A (ja) * 1999-11-26 2001-06-05 Honda Motor Co Ltd エンジンのシリンダ壁温制御装置
US20130047940A1 (en) * 2011-08-23 2013-02-28 Ford Global Technologies, Llc Cooling system and method
WO2018096712A1 (ja) * 2016-11-22 2018-05-31 伸和コントロールズ株式会社 流量制御用二方弁及びこれを用いた温度制御装置

Also Published As

Publication number Publication date
JPWO2020196375A1 (enrdf_load_stackoverflow) 2020-10-01
JP7075538B2 (ja) 2022-05-25

Similar Documents

Publication Publication Date Title
JP5941602B2 (ja) 揺動形アクチュエータ調整装置の油圧バルブ
JP6369966B2 (ja) 揺動形アクチュエータのための中央バルブ
US6279516B1 (en) Cylinder head with two-plane water jacket
US10801437B2 (en) Liquid-cooled internal combustion engine
JP2011058458A (ja) 内燃機関のオイル供給装置
KR20190020214A (ko) 유량제어밸브
CN105649746B (zh) 多气缸引擎的冷却油通道结构
US10119451B2 (en) Internal combustion engine cooling
JP2020509290A (ja) 内燃機関のシリンダヘッド
JP2018131921A (ja) 水冷ｓｏｈｃエンジン
US6752108B2 (en) Four-cycle engine for marine drive
JP7075538B2 (ja) 内燃機関の冷却構造
JP2018155215A (ja) シリンダヘッド構造
JP2018123742A (ja) 内燃機関
JP6977590B2 (ja) 車載内燃機関
JP2010014025A (ja) 内燃機関の冷却構造
US10731597B2 (en) Cylinder head for internal combustion engine
EP0682176A1 (en) Internal combustion engine
CN104755710A (zh) 机油控制阀
JP6606168B2 (ja) 水冷エンジン
US6910450B2 (en) Variable valve timing structure for outboard motor engine
JP5363554B2 (ja) 内燃機関の冷却構造
KR102621555B1 (ko) 엔진 냉각수 유동 가변 조절 장치
US11131268B2 (en) Multi-cylinder internal combustion engine
JP7347178B2 (ja) オイルポンプ装置

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: 20776775

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 2021509372

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20776775

Country of ref document: EP

Kind code of ref document: A1