EP2253811B1 - Fluidkanalstruktur eines Verbrennungsmotors - Google Patents

Fluidkanalstruktur eines Verbrennungsmotors Download PDF

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Publication number
EP2253811B1
EP2253811B1 EP10163053A EP10163053A EP2253811B1 EP 2253811 B1 EP2253811 B1 EP 2253811B1 EP 10163053 A EP10163053 A EP 10163053A EP 10163053 A EP10163053 A EP 10163053A EP 2253811 B1 EP2253811 B1 EP 2253811B1
Authority
EP
European Patent Office
Prior art keywords
oil
lubricating oil
internal combustion
combustion engine
section
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP10163053A
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English (en)
French (fr)
Other versions
EP2253811A1 (de
Inventor
Kenji Sasaki
Atsushi Sato
Seiji Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
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Honda Motor Co Ltd
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Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of EP2253811A1 publication Critical patent/EP2253811A1/de
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Publication of EP2253811B1 publication Critical patent/EP2253811B1/de
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/08—Arrangements of lubricant coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/0025—Oilsumps with heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/06—Adapter frames, e.g. for mounting heat exchanger cores on other structure and for allowing fluidic connections

Definitions

  • the present invention relates to a fluidic channel structure of internal combustion engine, in particular, to the fluidic channel structure of internal combustion engine for flowing fluid through an oil cooler.
  • Patent Literature 1 Patent Laid-open Unexamined Publication No. 144, 977 of 2008 discloses a brazing oil cooler of two cooling water pipe sections in an opposite side of attachment surface of an internal combustion engine of a core section. This oil cooler is provided with a core section for exchanging heat between oil and cooling water, and an end plate for forming a flange section extending in an attachment side of the internal combustion engine of the core section.
  • Patent Literature 2 Patent Laid-open unexamined publication No. 077,925 of 2007 discloses an engine for automatic two-wheeled vehicle to attach a separate oil pan, different from a crankcase under a lower surface of the crankcase, to supply each oiling place inside an engine through an oil supply channel from the oil pump with oil, and to return oil after oiling to the oil pan.
  • Patent Literature 2 discloses a structure to attach an oil cooler arranged by way of the oil supply channel in a front surface, a side surface, or a rear surface of the oil pan.
  • the cooling water pipe is, however, brazed in a surface attaching the internal combustion engine of the core section and its opposite surface. Then, a height of the oil cooler is large in size. Accordingly, it may be possible that pipes, accessories, frames, or the like surrounding the internal combustion engine has been easily interfered one another and there has few degrees of fredom in layout in view of attachment place. When a degree of freedom in layout is seeked for, the internal combustion engine is easily made larger and it is difficult to be in a compact design.
  • the oil cooler is required for an inlet passage and an outlet passage in each of lubricating oil and cooling water. Accordingly, a constitution of the cooling water passage and the lubricating oil passage inside the internal combustion engine comes to be complicated. Then, it may be incurred to make large the internal combustion engine body and to increase the manufacturing cost.
  • JP 55067303 U discloses a fluidic channel structure in accordance with the preamble of claim 1.
  • a first object (task) of the present invention is to provide a fluidic channel structure of internal combustion engine possible for making smaller the oil cooler without making complicated fluidic passage structure inside the internal combustion engine.
  • a second object (task) is to provide a fluidic passage structure of internal combustion engine, which is easy for maintenance of the oil cooler.
  • the present invention provides a fluidic channel structure in accordance with claim 1.
  • the lower portion of the internal combustion engine body is provided with an oil pan reserving a lubricating oil, an oil pump supplying the lubricating oil and sucking from the oil pan to each lubricating section of the internal combustion engine body, an oil cooler mounting on the internal combustion engine body and cooling down the lubricating oil, a lubricating oil passage flowing the lubricating oil by connections of the oil pan, the oil pump, the oil cooler, and each lubricating section, and a refrigerant passage supplying the oil cooler with the refrigerant.
  • the oil cooler includes a core section for exchanging heat between the lubricating oil circulating section of the lubricating oil and the refrigerant circulating section of the refrigerant, and a frange section extending from an end of the attachment side of the internal combustion engine body of the core section.
  • the communication port for lubricating oil between the lubricating oil circulating section and the lubricating oil passage, and the refrigerant communication port between the refrigerant circulating section and the refrigerant passage are formed in the attachment side of the internal combustion engine body.
  • the flange section is provided with a through hole penetrating from an attachment surface of the internal conmbustion engine body to a surface placed in the side of the core section.
  • the through hole is arranged to communicate either of the refrigerant passage and the lubricating oil passage from a surface placed in a side of the core section.
  • the surface of the internal combustion engine body attaching the oil cooler is provided with a concave groove connecting each of the refrigerant communication port and the lubricating oil communication port to the through hole.
  • the pipe flowing the refrigerant and the lubricating oil is connected to the flange section of the oil cooler to supply and suck the refrigerant lubricating oil from the pipe through the concave groove formed on a surface of the internal combustion engine body to the oil cooler.
  • the pipe for refrigerant or lubricating oil is arranged in a dead space in the surrounding of the flange section of the oil cooler, they are able to avoid interferences with the pipes, accessories, frames, or the like placed in the surrounding of the internal combustion engine, and thus an improvement of a degree of freedom in layout can be obtained, and the internal combustion engine is able to be small in size.
  • a simple constitution can be obtained by providing a concave groove on a surface of the internal combustion engine and providing the through hole in the flange section of the oil cooler. Then, it can be simply constituted and large-size scaling of the internal combustion engine and the manufacturing cost can be effectively restricted in its increase, compared with a case where both the refrigerant passage and the lubricating oil passage are formed inside the internal combustion engine.
  • the core section is very few required for maching, a specific core section is not required for manufacturing and its material cost can be efffectively restricted to increase.
  • the oil cooler is preferably provided in the oil pan arranged under the internal combustion engine body. More specifically, a recess with a part thereof depressed is provided in the bottom of the oil pan, and the oil cooler is arranged through the flange section in the recess.
  • the oil cooler is arranged in the recess forked in the oil pan, it is easy to attach in or detach from the internal combution engine body, thus to improve its maintenance, together with its operation and effect.
  • the oil cooler is never interfered with the other parts, and it is also easy to make large a volume of the oil cooler.
  • the oil pan is constituted by an upper oil pan and a lower oil pan attached below the upper oil pan.
  • the oil cooler is preferably constituted to be arranged in an area, in which it is placed in the bottom of the upper oil pan and the lower oil pan is not arranged.
  • the oil cooler is mounted in an area in which the lower oil pan, i.e. an oil reservoir is not arranged among the bottoms of the upper oil pan arranged on the upper side of the oil pan to be divided into two pieces at upper and lower positions.
  • the pipe of the oil cooler does not extrude in a lower direction relative to the bottom of the lower oil pan.
  • the internal combustion engine body can be made to be compact.
  • the refrigerant passage is laid out in the through hole from a surface placed in the side of the core section, a path between the communication hole for refrigerant and the through hole are connected by the concave groove, the communication port for lubricating oil is connected to the oil pan-integrated lubricating oil passage formed integrally inside the oil pan, and the oil pan-integrated lubricating oil passage is so preferably constituted that the oil pump provided inside the casing member arranged to one end of the oil pan and the communication port for lubricating oil are connected each other.
  • the complicated fluidic channel can be prevented and the internal combustion engine body can be restricted in its large-size scaling.
  • the oil pan-integrated lubricating oil passage is formed to cross the bottom of the oil pan being an attachment surface of the oil cooler, the bottom of the oil pan can be effectively reinforced.
  • this invention can provide a fluidic channel structure of internal combustion engine, which is possible to make small the oil cooler without a complicated fluidic channel inside the internal combustion engine body.
  • FIG 1 is a side view of an automotive engine providing a fluidic channel structure of internal combustion engine relating to this embodiment.
  • an automotive engine 1 constituting an internal combustion engine body is constituted by cumulating an oil pan 2, a cylinder block 3, a cylinder head 4, and a cylinder head cover 5 arranging in order from the lower.
  • a chain casing 6 is provided in the side of the engine 1 to cover a timing chain as not shown and the like.
  • the oil pan 2 is a member for reserving the lubricating oil, and is provided with two members, which is disposed of an upper oil pan 21 receiving the lubricating oil as dropped from the internal combustion engine body.
  • a part of the bottom 21a of the upper oil pan 21 is adapted to extrude an attachment opening 21b for mounting the lower oil pan 22.
  • the lower oil pan 22 is mounted to choke the attachment opening 21b.
  • An area, in which the attachment opening 21b of the bottom 21a of the upper oil pan 21 is not formed, is constituted to form a recess 23 as a part of the bottom of the oil pan 2 depressed.
  • an oil cooler 7 for cooling down the lubricating oil is provide in the bottom (that is, the bottom 21a of the upper oil pan 21) of the recess 23.
  • the cylinder block 3 is a member in which a plurality of cylinders are arranged and various kinds of moving parts are housed.
  • a crankshaft 31 is rotatably provided inside the cylinder block 3. Although it is shown by drawings, the crankshaft 31 is connected through a connection rod to a piston to rotate the crankshaft 31 by sliding the piston in an up-and-down direction inside the cylinder.
  • an oil pump 8 and the driving sprocket wheel as not shown is attached to one end 31a thereof.
  • a cylinder head 4 is a member as constituted mainly by an intake port for supplying this combustion chamber with air, and an outtake port for exhausting an exhaust air from a combustion chamber-
  • the side of the cylinder head 4 is provided with an exhaust manifold 41 for exhausting an exhaust air from the outtake port to the outside.
  • the opposite side of the cylinder head 4 is provided with the intake manifold (as not shown) for intaking air to the intake port.
  • the cylinder head cover 5 is provided on the cylinder head 4, and is a member covering a cam holder providing a dynamic valve mechanism including a cam shaft as not shown.
  • the cam shaft is designed to rotably hold the cam holder and one end thereof is provided with a driven sprocket wheel (as not shown).
  • a chain casing 6 is a member covering a timing chain wounded around the above driving sprocket wheel and the driven sprocket wheel.
  • An oil pump S and an oil pump casing 9, which are casing members, covering the oil pump 8 and forming a lubricating oil passage are arranged inside the chain casing 6.
  • An oil filter 10 for filtering the lubricating oil is arranged at the side of a lower end of the chain casing 6.
  • FIG 2 is a perspective view of the oil cooler.
  • Figure 3 is an exploded perspective view showing a state looking up the oil pan and the oil cooler from oblique lower.
  • Figure 4 is a sectional view of the oil pan and the oil cooler taken along a line I- I.
  • the oil cooler 7 is a cooling device of the lubricating oil by the cooling water being a refrigerant.
  • the refrigerating device is provided with a plate-like base plate 71, and an approximately rectangular core section 72 arranged at the lower side of the base plate 71.
  • the base plate 71 has a function for a lid of the core section 72 as described in the following.
  • the circumferential edge portion of the base plate 71 is constituted to extend from the side of the core section 72 to constitute a flange section 73 by the extended portion.
  • the flange section 73 is provided with a plurality of bolt holes 73a.
  • the oil cooler 7 is mounted in the recess 23 of the oil pan 2 by inserting a plurality of bolts B into a plurality of bolt holes 73a and screwing in the bottom 21a of the upper oil pan 21.
  • a pair of communication ports for lubricating oil 74a, 74b are penetratingly formed to enter the lubricating oil in the core section 72 or to supply the lubricating oil from the core section 72 in an inner side of the flange section 73 of the base plate 71.
  • a pair of communication ports for lubricating oil 74a, 74b are respectively arranged in a place corresponding to a pair of corners, which lie in either one of diagonal lines of the core section 72.
  • a pair of communication ports for cooling water 75a, 75b are penetratingly formed to enter the cooling water in the core section 72 or to supply the cooling water from the core section 72 in an inner side of the flange section 73 of the base plate 71.
  • a pair of the communication ports for cooling water 75a, 75b are respectively arranged in places corresponding to a pair of corners, which lie in the other diagonal line of the core section 72.
  • the flange section 73 of the base plate 71 is respectively provided with a pair of through holes 76a, 76b penetrating in a surface placed in the side of the oil pan 2 to a surface placed in the side of the core section 72.
  • the through holes 76a, 76b are respectively formed in the proximity of the communication ports for cooling water 75a, 75b.
  • the pipes P1, P2 having an approximately L-letter shape constituting the cooling water passage are laid out in the side of the core section 72 of the through holes 76a, 76b formed in the flange section 73.
  • the pipes P1, P2 are, for example, brazed in the frange section 73 of the oil cooler 7.
  • the flange section 73 of the pipes P1, P2 and the opposite end are connected, for example, through a connection hose as not shown to a cooling water passage such as water jacket formed inside the engine 1.
  • the core section 72 is provided with the lubricating oil circulating section 72a flowing the lubricating oil, and the cooling water circulating section 72b flowing the cooling water.
  • the lubricating oil circulating section 72a and the cooling water circulating section 72b are mutually separated by a partition 79- For example, they are alternately cumulated to be a uniform layer in up-and-down direction.
  • the upstream side of the cooling water circulating section 72b is connected to the communication port for cooling water 75a placed in the intake side, and the downstream side of the cooling water circulating section 72b is connected to the communication port for cooling water 75b in the outtake side.
  • the upstream side of the lubricating oil circulating section 72a is connected to the communication port for lubricating oil 74a, and the downstream side of the lubricating circulating section 72a is connected to the communication port for lubricating oil 74b in the outtake side.
  • the heat of lubricating oil circulating the lubricating oil circulating section 72a is transferred to the cooling water circulating in the cooling water circulating section 72b through the partition 79, thus to cool down the lubricating oil.
  • a constitution of the core section 72 is not particularly restricted.
  • a first concave groove 25a is formed in a surface (lower surface) of the bottom 21a of the upper oil pan 21 and in a place corresponding to the communication port for cooling water 75a and a through hole 76a in the intake side of the oil cooler 7.
  • a second concave groove 25b is formed in a surface (lower surface) of the bottom 21a of the upper oil pan 21 and in a place corresponding to the communication port for cooling water 75b and a through hole 76b in the outtake side of the oil cooler 7.
  • the first concave groove 25a is connected to the communication port for cooling water 75a in the intake side and the through hole 76a in a state as the oil cooler 7 in the bottom 21a of the upper oil pan 21 attached.
  • cooling water passage is so constituted that the pipe P1, the through hole 76a, the first concave groove 25a, the communication port for cooling water 75a, the cooling water circulating section 72b in the core section 72, the communication port for cooling water 75b, the second concave groove 25b, the through hole 76a, and the pipe P2 are serially connected in order.
  • the openings 26a, 26b of the lubricating oil passages are respectively provided in places corresponding to the communication port for lubricating oil 74a, 74b (c.f. Figure 2 ) of the oil cooler 7 in the bottom 21a of the upper oil pan 21.
  • the lubricating oil passage formed inside the engine 1 and the communication ports for lubricating oil 74a, 74b are mutually connected in a state as the oil cooler 7 attached in the bottom 21a of the upper oil pan 21.
  • An elliptical and annular sealing grooves 28a, 28b are formed in the surrounding of the first concave groove 25a and the second concave groove 25b.
  • Annular sealing grooves 27a, 27b are formed in the surrounding of the openings 26a, 26b of the lubricating oil passage.
  • These sealing grooves 27a, 27b, 28a, 28b are respectively provided with a sealing member S (c.f. Figure 4 ) for preventing the lubricating oil or cooling water from leaking.
  • the bottom 21a of the upper oil pan 21 is provided with a female screw hole 21cm engaging with a bolt B at a place corresponding to a plurality of bolt holes 73a formed in the flange section 73 of the oil cooler 7.
  • Figure 5 is a perspective view showing a state looking down the bottom of the oil pan and the side wall of the chain casing from oblique upper.
  • Figure 6 is a sectional view taken along a line II - II in Figure 6 .
  • an oil pump casing 9 is arranged in a surface placed in the side of the cylinder block 3 of the side wall 63 of the chain casing 6.
  • the oil pump casing 9 is provided with an insert hole 93a for inserting one end 31a of the crankshaft 31 as the oil pump 8 attached.
  • a circulating section for oil pump 94 being a lubricating oil passage used also for an installment space of the oil pump 8 in a place between the side wall 63 and the oil pump casing 9 (c.f.
  • a circulating section for oil filter 95 being a lubricating oil passage communicating the inside of the oil pan 2 and an intake port of the oil filter 10 in a place between the side wall 63 and the oil pump casing 9 is formed.
  • a circulating section for main gallery 97 being a lubricating oil passage communicating an outtake port of the oil filter 10 and the main gallery 36 in a place between the side wall 63 and the oil pump casing 9 is formed.
  • the main gallery 36 is a part of the lubricating oil passage formed inside the cylinder block 3, and connected to be able to supply each of lubricating oil sections such as the bearing cap and oil jet provided inside the cylinder block 3 with the lubricating oil.
  • the main gallery 36 is designed to supply a sliding section (lubricating section) of cam shaft through the oil passage formed in the cylinder head 4 with the lubricating oil.
  • the oil pump casing 9 is provided with a relief valve passage 98 connecting an intake port 94a and an outtake port 94b of the circulating portion for oil pump 94 to arrange a relief valve (as not shown) inside the relief valve passage 98.
  • a suction pipe 22a for sucking the lubricating oil reserved in the lower oil pan 22 is provided inside the oil pan 2.
  • One end of the suction pipe 22a is connected to an oil strainer as not shown, and the other end of the suction pipe 22a is connected to the intake port 94a of the circulating section for oil pump 94.
  • a first oil pan-integrated lubricating oil passage 211 connecting the outlet port 94b of the circulating section for oil pump 94 and the communication port for lubricating oil 74a placed in the intake side of the oil cooler 7 is integrally formed with the upper oil pan 21 on an upper surface of the bottom 21a of the upper oil pan 21 as the oil cooler 7 attached.
  • the oil pan-integrated 211 represents an external form swelling up an upper surface of the bottom 21a of the upper oiol pan 21 in a semicylindrical shape.
  • a second oil pan-integrated lubricating oil passage section 212 connecting the communication port for lubricating oil 74b placed in the outtake side of the oil cooler 7 and the intake port 95a of the circulating section for oil filter 95 is integrally formed with the upper oil pan 21.
  • the second oil pan-integrated lubricating oil passage section 212 represents approximately the same constitution as the first oil pan-integrated lubricating oil passage section 211, its drawings are omitted.
  • the lubricating oil passage is so constituted that the suction pipe 22a, the circulating section for oil pump 94, the first oil pan-integrated lubricatingoil passage section 211, the communication port for lubricating oil 74a, the lubricating oil circulating section 72a inside the core section 72, the communication port for lubricating oil 74b, the second oil pan-integrated lubricating oil passage section 212, the circulating section for oil filter 95, the oil filter 10, and the circulating section for main gallery 97 are communicated in the above order.
  • the first oil pan-integrated lubricating oil passage section 211 and the second oil pan-integrated lubricating oil passage section 212 are, for example, formed to be parallel to an axial direction of the crankshaft 31.
  • the first oil pan-integrated lubricating oil passage section 211 and the second oil pan-integrated lubricating oil passage section 212 are integrally manufactured with the upper oil pan 21 by disposing a core in a hollow portion at the time of casting the upper oil pan 21.
  • the first oil pan-integrated lubricating oil passage section 211 is formed like straddling the second concave groove 25b.
  • cooling water supplied from a radiator is designed to flow through the pipe P1, the through hole 76a, the first concave groove 25a, and the communication port for cooling water 75a, and enter the cooling water circulating section 72b of the core section 72.
  • the cooling water entering the cooling water circulating section 72b rises in temperature by absorbing heat from the lubricating oil circulating the lubricating oil circulating section 72a, it flows through the communication port for cooling water 75b, the second concave groove 25b, the through hole 76b and the pipe P2, and then returns to the radiator.
  • the lubricating oil reserved in the oil pan 2 is sucked through the suction pipe 22a by driving the oil pump 8.
  • the lubricating oil sucked in the suction pipe 22a flows through the oil pump circulating section 94, the first oil pan-integrated lubricating oil passage section 211, and the communication port for lubricating oil 74a, and enters the lubricating oil circulating section 72a of the core section 72.
  • the lubricating oil entered in the lubricating oil circulating section 72a of the core section 72 is cooled down owing to the heat absorbed by cooling water circulating through the cooling water circulating section 72b, it flows through the communication port for lubricating oil 74b, the second oil pan-integrated lubricating oil passage section 212 and the circulating section for oil filter 95, and enters the oil filter 10.
  • the lubricating oil filtering impurities at the oil filter 10 is supplied by pressure through the circulating section for main gallery 97 to the main gallery 36.
  • the lubricating oil supplied by pressure to the main gallery 36 is supplied to each of lubricating portions of the engine 1 and relieves the friction at each of the lubricating portions.
  • the lubricating oil supplied to the lubricating portion returns through channels such as channels for drainage as not shown to the oil pan 2.
  • the pipes P1, P2 are connected to the flange section 73 of the oil cooler 7. Then, the cooling water are intaken and outtaken from the pipes P1, P2 through the first concave groove 25a and the second concave groove 25b formed on a surface of the bottom 21a of the upper oil pan 21 to the core section 72 of the oil cooler 7.
  • the pipes P1, P2 for cooling water are arranged in a dead space positioned in the surrounding of the flange section 73 of the oil cooler 7, they can avoid interferencing with pipings, accessories, frames, or the like placed in the surrounding of the engine 1, and the improvement of degrees of freedom in layout and the small-size scaling of internal combustion engine can be obtained.
  • the cooling water passage can be realized in a simple constitution by that the first concave groove 25a and the second concave groove 25b are formed in a surface of the bottom 21a of the upper oil pan 21 and the flange section 73 of the oil cooler 7 is provided with the through holes 76a, 76b.
  • the cooling water passage leading to the oil cooler 7 and the lubricating oil passage are formed inside the engine 1, it is formed in a simple constitution and a large-size scaling of the engine 1 and an increase of manufacturing cost can be effectively restricted.
  • it is very few required to machine the core section 72 it is not required to manufacture a specific core section 72 and the material costs can be effectively restricted to be lower.
  • the oil cooler 7 is arranged in the recess 23 formed in the oil pan 2, it is easy to attach and detach the oil cooler 7 from the engine 1 and improve the maintenance in addition to the above functions and effects.
  • the other parts are very few arranged in the lower portion of the oil pan 2, the oil cooler 7 never interferes with the other parts, and it is easy to increase a volume of the oil cooler 7. It is possible to lay out such that the pipes P1, P2 of the oil cooler 7 does not extrude below the bottom of the lower oil pan 22, and it is possible to provide a compact engine 1.
  • the first oil pan-integrated lubricating oil passage section 211 and the second oil pan-integrated lubricating oil passage section 212 are formed to cross a surface (upper surface) of the bottom 21a of the upper oil pan 21 being an attachment surface of the oil cooler 7.
  • the bottom 21a of the upper oil pan 21 can be effectively reinforced.
  • the cooling water is adapted to flow through the through holes 76a, 76b formed in the flange section 73 and the first concave groove 25a and the second concave groove 25b formed in the bottom of the oil pan 2 to the oil cooler 7, and to flow the lubricating oil from the lubricating oil passage provided in the oil pan 2 to the oil cooler 7,
  • the present invention is not limited thereto. It may be adapted to flow the lubricating oil to the through hole 76a formed in the flange section 73, the first concave groove 25a and the second concave groove 25b formed in the bottom of the oil pan 2. It may be also adapted to flow the cooling water from the cooling water passage provided in the oil pan 2 to the oil cooler 7.
  • the fluid flowing from the outside of the engine 1 to the oil cooler 7 may be appropriately modified according to a constitution of the cooling water passage and the lubricating oil passage, properties and variations of the layout can be improved.
  • the lubricating oil passage is adapted to be formed between the chain casing 6 and the oil pump casing 9 in this embodiment, the present invention is not limited thereto, and the lubricating oil passage may be provided only by the oil pump casing 9.
  • the fluidic channel structure of internal combustion engine can be, of course, applied to an interval combustion engine other than an automotive vehicle.
  • This invention provides a fluidic channel structure of internal combustion engine enabling an oil cooler to be smaller in size without a complicated fluidic channel structure placed inside the internal combustion engine body.
  • This is a fluidic channel structure including an oil cooler (7), a lubricating oil passage, and a cooling water passage.
  • the oil cooler (7) has a core section (72) exchanging heat and a flange section (73) extending in the surrounding of the core section (72).
  • the core section (72) is provided with a pair of communication port for lubricating oil (74a), (74b), the flange section (73) is provided with a pair of through holes (76a), (76b), the pipes (P1), (P2) are laid out in a pair of through holes (76a), (76b), and the first concave groove (25a) and the second concave groove (25b) connecting respectively to a pair of communication port for cooling water and a pair of through holes (76a), (76b) are formed in a surface of the bottom (21a) of the oil pan (2) attaching the oil cooler (7).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (3)

  1. Fluidkanalstruktur eines Verbrennungsmotors, umfassend:
    eine Ölwanne (2), die in einem unteren Abschnitt eines Verbrennungsmotorkörpers vorgesehen ist und Schmieröl speichert,
    eine Ölpumpe (8), die jeden zu schmierenden Abschnitt des Verbrennungsmotorkörpers mit von der Ölwanne (2) angesaugtem Schmieröl versorgt,
    einen Ölkühler (7), der an dem Verbrennungsmotorkörper angebracht ist und das Schmieröl abkühlt,
    einen Schmierölkanal (211, 212), der das Schmeiröl zirkuliert, durch serielles Verbinden der Ölwanne (2), der Ölpumpe (8), des Ölkühlers (7) und jedes zu schmierenden Abschnitts, und
    einen Kühlmittelkanal (P1, P2), der den Ölkühler (7) mit Kühlmittel versorgt, worin
    der Ölkühler (7) einen Kernabschnitt (72), der Wärme zwischen einem Schmierölzirkulationsabschnitt (72a) des Schmieröls und einem Kühlmittelzirkulationsabschnitt (72b) des Kühlmittels austauscht, sowie einen Flanschabschnitt (73), der sich von einem Ende einer Verbrennungsmotorkörper-Befestigungsseite des Kernabschnitts (72) zur Umgebung erstreckt,
    und worin
    der Verbrennungsmotorkörper eine Schmierölverbindungsöffnung (74a, 74b), die den Schmierölzirkulationsabschnitt (72a) und den Schmierölkanal (211, 212) verbindet, sowie eine Kühlmittelverbindungsöffnung (75a, 75b), die den Kühlmittelzirkulationsabschnitt (72b) und den Kühlmittelkanal (P1, P2) an deren Befestigungsseite verbindet, bildet, und der Flanschabschnitt (73) ein Durchgangsloch (76a, 76b) bildet, der von einer Oberfläche der Verbrennungsmotorkörper-Befestigungsseite zu einer in der Seite des Kernabschnitts (72) angeordneten Oberfläche hindurchgeht, und worin
    das Durchgangsloch (76a, 76b) so ausgestaltet ist, dass einer des Kühlmittelkanals (P1, P2) und des Schmierölkanals ausliegt, und eine konkave Nut (25a, 25b), die die eine der Verbindungsöffnungen für Kühlmittel (75a, 75a) und für Schmieröl und das Durchgangsloch (76a, 76b) verbindet, in einer Oberfläche des Verbrennungsmotorkörpers ausgebildet ist, an der der Ölkühler (7) angebracht ist,
    dadurch gekennzeichnet, dass eine Vertiefung (23) als vertieftes Teil des Bodens in dem Boden (21 a) der Ölwanne (2) ausgebildet ist, und die Vertiefung (23) mit der konkaven Nut (25a, 25b) versehen ist und der Ölkühler (7) durch den Flanschabschnitt (73) angeordnet ist.
  2. Die Fluidkanalstruktur eines Verbrennungsmotors nach Anspruch 1, worin die Ölwanne (2) durch eine obere Ölwanne (21) und eine unter der oberen Ölwanne (21) angeordnete untere Ölwanne (22) aufgebaut ist, und
    der Ölkühler (7) ein Boden der oberen Ölwanne(21) zur Anordnung in einem Bereich ist, wo die untere Ölwanne (22) nicht angeordnet ist.
  3. Die Fluidkanalstruktur eines Verbrennungsmotors nach Anspruch 1 oder 2, worin der Kühlmittelkanal (P1, P2) von einer in der Seite des Kernabschnitts (72) im Durchgangsloch (76a, 76b) angeordneten Oberfläche ausliegt,
    die konkave Nut (25a, 25b) aufgebaut ist, um die Kühlmittel-Kommunikationsöffnung (75a, 75b) und das Durchgangsloch (76a, 76b) zu verbinden,
    die Schmierölverbindungsöffnung (74a, 74b) mit einem in der Ölwanne integrierten Schmierölkanal (211, 212) verbunden ist, der einstückig innerhalb der Ölwanne (2) ausgebildet ist, und
    der Ölwannen-integrierte Schmierölkanal (211, 212) mit der Ölpumpe (8), die innerhalb des im einen Ende der Ölwanne (2) angeordneten Gehäusematerials vorgesehen ist, und einer Schmierölverbindungsöffnung (74a, 74b) verbunden ist.
EP10163053A 2009-05-18 2010-05-18 Fluidkanalstruktur eines Verbrennungsmotors Not-in-force EP2253811B1 (de)

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