WO2018061085A1 - 内燃機関の潤滑構造 - Google Patents

内燃機関の潤滑構造 Download PDF

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Publication number
WO2018061085A1
WO2018061085A1 PCT/JP2016/078440 JP2016078440W WO2018061085A1 WO 2018061085 A1 WO2018061085 A1 WO 2018061085A1 JP 2016078440 W JP2016078440 W JP 2016078440W WO 2018061085 A1 WO2018061085 A1 WO 2018061085A1
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WO
WIPO (PCT)
Prior art keywords
oil
internal combustion
filter
combustion engine
oil filter
Prior art date
Application number
PCT/JP2016/078440
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
紳司 阿藤
玲奈 黒須
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 JP2018541755A priority Critical patent/JP6632734B2/ja
Priority to PCT/JP2016/078440 priority patent/WO2018061085A1/ja
Priority to BR112019005208-9A priority patent/BR112019005208B1/pt
Priority to CN201680089417.7A priority patent/CN109790767B/zh
Publication of WO2018061085A1 publication Critical patent/WO2018061085A1/ja
Priority to PH12019500566A priority patent/PH12019500566A1/en

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    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • 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
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means

Definitions

  • the present invention relates to an internal combustion engine, and more particularly to a lubricating structure provided with a centrifugal oil filter.
  • the oil stored in the oil pan is drawn through the lead-in flow path by driving the oil pump provided on the crankcase cover, and the oil is discharged into the discharge flow path formed in the crankcase cover. Since the discharge passage is also in communication with the shaft end oiling chamber for supporting the shaft end of the crank shaft formed in the crankcase cover, the discharged oil reaches the shaft end oiling chamber.
  • the upstream main flow passage and the downstream main flow passage perforated from the shaft end are formed apart from each other at the axial center of the shaft portion, and the upstream main flow passage and the downstream main flow passage of the shaft portion
  • a centrifugal oil filter is provided at a position between the two, and the inside of the disk-shaped centrifugal oil filter communicates with the upstream main flow passage and also communicates with the downstream main flow passage. Therefore, when the oil discharged by the drive of the oil pump reaches the shaft end oil supply chamber, it enters the upstream main flow path from the shaft end oil supply chamber and is led into the communicating centrifugal oil filter.
  • one centrifugal oil filter is provided as an oil filter for filtering oil in the oil passage to the lubrication portion of the crankshaft downstream of the oil pump. It is done.
  • An oil strainer is generally provided on the upstream side of the oil pump when drawing in the oil stored in the oil pan.
  • the oil strainer removes relatively large foreign matter, and fine foreign matter having a large specific gravity, such as metal powder that damages the bearing to be lubricated, needs to be separately removed with an oil filter.
  • the centrifugal oil filter performs removal of fine foreign matter.
  • the centrifugal oil filter has a flat disk shape, and foreign substances such as sludge having a high specific gravity and metal powder mixed in the oil by rotation move outward in the radial direction and deposit on the inner circumferential portion of the disk.
  • the centrifugal oil filter is provided on the shaft of the crankshaft, so there is no room for the space to be placed because it is necessary to avoid interference with other devices, and the disk is in the form of a flat disk, ensuring the capacity as much as possible. I try to do that, but I have limitations. Therefore, the frequency of maintenance for performing a cleaning operation for removing deposits accumulated inside the centrifugal separation type oil filter is increased.
  • the centrifugal oil filter is provided on the shaft of the crankshaft, so it is necessary to remove the crankcase cover, which is a major maintenance work and accumulated inside the centrifugal oil filter. Since it is necessary to carry out a cleaning operation to remove foreign matter and the like, labor is required. Performing such maintenance work frequently is extremely cumbersome and costly.
  • the present invention has been made in view of such a point, and the objective of the present invention is to secure the oil capacity of the oil filter sufficiently, suppress the frequency of maintenance, and maintain the centrifugal oil filter with a simple maintenance operation.
  • the point is to provide a lubricating structure of an internal combustion engine which can reduce labor by extremely reducing the frequency of
  • the lubricating structure of an internal combustion engine is:
  • An engine case is constituted by a crankcase rotatably supporting a crankshaft and a pair of crankcase covers respectively covering the crankcase from both sides in a direction in which the crankshaft is directed, It has an oil reservoir on the bottom wall of the crankcase,
  • a centrifugal separation type oil filter is provided on a shaft portion of the crankshaft that protrudes laterally from the crankcase.
  • An oil filter incorporating a filter element is provided in an oil passage extending from an oil pump that pumps up oil from the oil storage portion to the centrifugal separation type oil filter.
  • the centrifugal separation oil from the oil pump that pumps oil from the oil storage portion Since an oil filter incorporating a filter element is provided in the oil passage leading to the filter, the total oil volume as the oil filter is significantly increased, and the frequency of maintenance can be suppressed.
  • the oil filter with a built-in filter element is a replacement work for the filter element rather than the centrifugal separation type oil filter that performs cleaning work in maintenance, so maintenance is easy and it is troublesome by performing simple maintenance of this oil filter Centrifuge-type filter maintenance can be done very infrequently and significantly reduced effort.
  • the oil filter may be provided on an outer wall of the engine case.
  • the oil filter is provided on the outer wall of the engine case, there is no cover member that covers the oil filter from the outside, and the oil can be more easily and in a short time without removing the cover member. It is possible to maintain the filter.
  • the oil filter may be disposed at a position not overlapping the centrifugal oil filter as viewed in the axial direction of the crankshaft.
  • the oil filter is disposed at a position not overlapping with the centrifugal separation type oil filter in the axial direction of the crankshaft, so that the width in the axial direction of the crankshaft of the internal combustion engine is suppressed. Miniaturization can be achieved.
  • the oil filter may be provided on an outer peripheral wall axially extending from a peripheral edge of a side wall substantially perpendicular to the axial direction of the crankshaft in the engine case.
  • the engine case includes the side wall substantially perpendicular to the axial direction of the crankshaft and the outer peripheral wall extending in the axial direction from the peripheral edge of the side wall, and the oil filter has a relatively strong outer peripheral wall
  • the oil filter can be firmly provided, and the strength and rigidity of the outer peripheral wall can be further improved.
  • the oil filter can be provided without increasing the axial width of the crankshaft of the internal combustion engine, and the enlargement of the internal combustion engine can be avoided.
  • the oil filter may be provided such that a portion thereof protrudes outward of the outer peripheral wall as viewed in the axial direction of the crankshaft.
  • the oil filter is provided such that a portion thereof protrudes outward of the outer peripheral wall as viewed in the axial direction of the crankshaft, so that the projection from the outer peripheral wall by the oil filter is made as small as possible
  • the penetration of the outer wall by the filter to the inside can also be reduced to avoid interference with the internal structure.
  • the internal combustion engine is provided with a cylinder block projecting from the crankcase so that the cylinder axis is substantially horizontal.
  • the oil filter may be provided on a corner wall between the wall where the cylinder block protrudes and the bottom wall of the outer peripheral wall of the engine case.
  • the internal combustion engine is provided with the cylinder block projecting from the crankcase so that the cylinder axis is substantially horizontal, and between the wall portion of the engine case projecting from the cylinder block and the bottom wall Since the oil filter is provided on the corner wall of the cylinder block, the oil filter can be disposed using a dead space near the lower part or the lower part of the cylinder block and near the engine case.
  • the oil filter may be located above the lower surface of the bottom wall.
  • the oil filter is positioned above the lower surface of the bottom wall portion of the engine case, so the oil filter does not protrude below the lower surface of the bottom wall portion of the engine case, and from the ground of the internal combustion engine The necessary distance can be easily secured.
  • the oil filter may be disposed below the oil pump.
  • the oil filter is disposed below the oil pump, so that when the internal combustion engine stops operating, the oil filter disposed below the stopped oil pump is filled with oil.
  • the oil can be circulated without delay when restarting.
  • An oil drain hole communicating with the oil storage portion is formed at the bottom wall portion of the crankcase to open downward.
  • the opening of the oil drain hole is closed by a cap,
  • An oil strainer held by the cap is disposed in the oil drain hole,
  • the upstream side of the oil strainer is in communication with the oil reservoir,
  • the downstream side of the oil strainer may be in communication with a pump oil passage for the oil pumped by the oil pump.
  • the oil drain hole provided in the bottom wall portion of the crankcase is closed by the cap, the oil strainer held by the cap is disposed in the oil drain hole, and the upstream side of the oil strainer communicates with the oil reservoir Since the downstream side of the oil strainer is communicated with the oil pumping path of the oil pumped up by the oil pump, the oil accumulated in the oil reservoir is removed by the oil strainer and the relatively large foreign matter is removed and pumped up by the oil pump.
  • the oil discharged from the pump passes through the oil filter and is then removed from the fine foreign matter, and then flows into the centrifugal oil filter, where the fine foreign matter is further removed and supplied to the lubricated portion of the crankshaft.
  • the oil strainer held by the cap is disposed in the oil drain hole, the oil strainer can be taken out from the inside of the crankcase by removing the cap from the oil drain hole, and maintenance of the oil strainer can be simplified. .
  • the present invention relates to a lubricating structure of an internal combustion engine in which a centrifugal separation type oil filter is provided on a shaft portion laterally projecting a crankcase of a crankshaft, wherein an oil pump for pumping oil from an oil storage portion to a centrifugal separation oil filter Since an oil filter using a filter element is provided in the entire oil passage, the overall oil volume as the oil filter is significantly increased, and the frequency of maintenance can be suppressed.
  • the oil filter with a built-in filter element is more replacing the filter element than the centrifugal oil filter, which also performs maintenance work as well as maintenance work, so maintenance is easy and it is troublesome by performing simple maintenance of this oil filter. Centrifuge-type filter maintenance can be done very infrequently and significantly reduced effort.
  • FIG. 1 is a side view of a motorcycle equipped with an internal combustion engine equipped with a centrifugal clutch according to a first embodiment of the present invention.
  • FIG. 5 is a side view mainly showing an engine case of an internal combustion engine of the same motorcycle.
  • FIG. 2 is a bottom view of the vicinity of an internal combustion engine of the same motorcycle.
  • FIG. 9 is a cross-sectional view of the same internal combustion engine (a cross-sectional view taken along line IV-IV in FIG. 9). It is a partially expanded sectional view of FIG.
  • FIG. 9 is a cross-sectional view of the same internal combustion engine (a cross-sectional view taken along line VI-VI in FIG. 9). It is a side view of the same internal combustion engine which removed the right crankcase cover.
  • FIG. 9 is a cross-sectional view of the same internal combustion engine which removed the right crankcase cover.
  • FIG. 8 is a side view of the internal combustion engine with the right crankcase cover, the centrifugal clutch and the like removed from the state of FIG. 7;
  • FIG. 2 is a cross-sectional view of the same internal combustion engine cut perpendicular to the axial direction of the crankshaft at the right crankcase. It is a perspective view of a right crankcase cover.
  • FIG. 2 is a transparent view of an oil circulation path in the internal combustion engine. It is a side view of the internal combustion engine which removed the right crankcase cover of the internal combustion engine concerning a 2nd embodiment. It is a side view of the internal combustion engine which removed the right crankcase cover of the internal combustion engine which concerns on 3rd Embodiment.
  • FIG. 1 is a side view of a motorcycle 1 on which an internal combustion engine E provided with a centrifugal separation type oil filter 75 is mounted.
  • the front, rear, left, and right directions conform to the usual standard with the rectilinear direction of the motorcycle 1 according to the present embodiment as the front, and in the drawings, FR is the front and RR is the rear. , LH indicates the left, and RH indicates the right.
  • one main frame 3 extends rearward and downward from the head pipe 2, and a pair of left and right pivot plates 4 are vertically provided at the rear end of the main frame 3. From left to right, a pair of left and right rear frames 5, 5 extend obliquely upward in the rear, and sub-frames 6, 6 are installed between the main frame 3 and the rear frames 5, 5.
  • a bar handle 7h is attached to an upper end of a steering shaft 7 pivotally supported by the head pipe 2, a lower portion of the steering shaft 7 is connected to a front fork 7f, and a front wheel 9 is pivotally supported at a tip of the front fork 7f.
  • a swing arm 11 is pivotally supported at its front end by a pivot shaft 10 on the pivot plate 4 so as to be vertically pivotable, and a rear wheel 12 is pivotally supported at the rear end of the swing arm 11.
  • a rear cushion 13 is interposed between the swing arm 11 and the upper rear frame 5.
  • the internal combustion engine E is suspended by being supported by an engine hanger 3 h and a pivot plate 4 which are provided so as to project downward from a rear side of the center of the main frame 3.
  • the internal combustion engine E is a four-stroke cycle, single-cylinder air-cooled internal combustion engine, and is mounted on the vehicle body frame in a horizontally oriented posture in which the crankshaft 40 is oriented in the left and right vehicle width directions.
  • the internal combustion engine E includes a pair of left and right split left and right crankcases 21L and 21R rotatably supporting the crankshaft 40, and a pair of left crankcases covering the left and right crankcases 21L and 21R from the left and right sides.
  • An engine case 20 is constituted by the cover 22L and the right crankcase cover 22R.
  • a cylinder block 23, a cylinder head 24, and a cylinder head cover 25 are sequentially stacked and project forward.
  • the cylinder block 23 projects forward to a cylinder axis Lc, which is the central axis of the cylinder of the cylinder block 23, nearly to the horizontal level, and the cylinder head 24 and the cylinder head cover 25 are sequentially stacked in front of the cylinder block 23.
  • An intake pipe 30 extends upward from the upper surface of the cylinder head 24 disposed so as to project substantially horizontally forward, and the intake pipe 30 is connected to an air cleaner 32 attached to the main frame 3 via a throttle body 31.
  • an exhaust pipe 35 extending downward from the lower surface of cylinder head 24 is bent and extends rearward along the lower surface of internal combustion engine E to the rear of engine case 20 and to the right of the vehicle body. It is connected to the arranged muffler 38.
  • the first catalytic converter 36 on the upstream side closer to the cylinder head 24 is disposed substantially horizontally and obliquely in the front-rear direction below the cylinder block 23 inclined forward to near horizontal (see FIGS. 1 and 3).
  • the downstream second catalytic converter 37 is disposed inside the muffler 38 (see FIG. 1).
  • the first catalytic converter 36 and the second catalytic converter 37 are both three-way catalysts.
  • the first catalytic converter 36 By dividing the catalyst into two parts, ie, the first catalytic converter 36 and the second catalytic converter 37, the same capacity as a large catalytic converter is secured to improve the purification performance, while the catalytic converters are small.
  • the first catalytic converter 36 can be compactly disposed below the cylinder block 23, and the second catalytic converter 37 can be accommodated in the muffler 38.
  • the first catalytic converter 36 is located upstream of the exhaust and is disposed below the cylinder block 23. Therefore, the catalyst is rapidly heated and activated when the engine is started, and the exhaust can be purified from the early stage of the start. Referring to FIG. 3, an exhaust pipe 35 downstream of the first catalytic converter 36 passes closely between the right crankcase 21R and the filter housing (121) of the oil filter 120. Therefore, it is possible to arrange the first catalytic converter 36 close to the crankcase 21.
  • the front cover 14 covers the front of the head pipe 2 of the vehicle body frame, and the left and right sides of the main frame 3 from above the main frame 3 are the cylinder block 23, the cylinder head 24, and the left and right of the cylinder head cover 25.
  • the leg shield 15 covers the side, and a body cover 16 covers the rear of the main frame 3 and the left and right sides of the rear frame 5.
  • a seat 18 and a loading platform 19 are provided at the top and the bottom of the body cover 16, and the opening between the seat 18 and the front upper portion of the body cover 16 is closed by the center cover 17.
  • the engine case 20 in the internal combustion engine E is exposed to the side without being covered by the leg shield 15 and the body cover 16 (see FIG. 1).
  • a tip end portion bent upward of a brake pedal 28 extending forward from the lower portion of the pivot plate 4 to the lower side of the engine case 20 is pivotably positioned.
  • a step 29 is located on the side of the front and rear central portion of the engine case 20.
  • a kick starter pedal 27 extending diagonally upward is located on the rear right side of the engine case 20.
  • FIG. 4 is a sectional development view of the internal combustion engine E (a sectional view taken along the line IV-IV in FIG. 9).
  • the crankshaft 40 of the internal combustion engine E is housed in the left and right crankcases 21L and 21R.
  • the left shaft portion 40L and the right shaft portion 40R coaxially integrally project from the pair of left and right crank webs 40w and 40w accommodated, and the crank pin 40p is connected between the left and right crank webs 40w and 40w to form an integral structure belongs to.
  • crankshaft 40 is rotatably supported by the left and right crankcases 40L and 40R on the left and right side shaft portions 40L and 40R supported by the left and right crankcases 21L and 21R via a pair of left and right main bearings 41 and 41, respectively. Ru.
  • the piston pin 42p of the piston 42 slidably fitted in the cylinder bore of the cylinder block 23 and the crank pin 40p of the crankshaft 40 are connected by the connecting rod 43, and the reciprocating motion of the piston 42 is cranked via the connecting rod 43. It is converted into rotational movement of the shaft 40.
  • the spark plug 44 fitted in the ceiling wall of the cylinder head 24 faces the electrode at the tip.
  • a drive sprocket 45, a starter driven gear 46, and an AC generator 48 are sequentially provided on the left shaft portion 40L extending leftward from the left main bearing 41 of the crankshaft 40 from the main bearing 41 side to the left.
  • the timing chain 152 is wound, and the camshaft 150 is rotationally driven at a half rotation speed of the crankshaft 40, and the intake rocker arm pivots in contact with the intake cam 150i and the exhaust cam 150e of the camshaft 150.
  • the exhaust rocker arm 153e opens and closes an intake valve and an exhaust valve (not shown) at a predetermined timing to perform intake / exhaust of the internal combustion engine E.
  • the outer rotor 48r of the AC generator 48 is fitted to the left end of the left shaft portion 40L of the crankshaft 40, and the inner stator 48s is fixedly supported by the left crankcase cover 22L.
  • the starter driven gear 46 rotatably supported on the left shaft portion 40L via the needle bearing 49 is interposed between the one-way clutch 47 and the outer rotor 48r of the AC generator 48 integrally coupled to the crankshaft 40.
  • the power is transmitted from the starter driven gear 46 to the outer rotor 48 r and the crankshaft 40 only in one direction, whereby the internal combustion engine E can be started.
  • a centrifugal clutch 70 and a centrifugal separation type oil filter 75 are provided on the right side shaft portion 40R extending rightward from the main bearing 41 on the right side of the crankshaft 40.
  • pump drive gear 51 is engaged with the inner race of main bearing 41 from the right side on right side shaft portion 40R of crankshaft 40, and thrust bearing 52 is in contact with pump drive gear 51 from the right side.
  • the primary drive gear 53 is engaged with the thrust bearing 52 from the right side so as to be rotatable relative to the right side shaft 40R.
  • the outer cylindrical member 54 is engaged with the right side shaft portion 40R so as to be relatively rotatable while in contact with the cylindrical base portion of the primary drive gear 53 from the right side.
  • the outer cylinder member 54 has a flange portion 54b developed in the outer peripheral direction at the right end of the cylindrical portion 54a of the same diameter in contact with the cylinder base of the primary drive gear 53. From the surface, a right end cylindrical portion 54c having a larger diameter than the cylindrical portion 54a is formed to protrude.
  • the right side shaft 40R of the crankshaft 40 has a spline shaft 40Ra on which a diameter is reduced to the right of the cylindrical portion 54a of the outer cylindrical member 54 via a step to form a spline.
  • the shaft end 40Rb is further to the right of the spline shaft 40Ra.
  • the washer 55 is fitted to the spline shaft portion 40Ra inside the right end cylindrical portion 54c of the outer cylindrical member 54 and abuts on the step portion, and then the annular member 56 is spline fitted.
  • a needle bearing 57 is interposed between the outer peripheral surface of the annular member 56 and the inner peripheral surface of the right end cylindrical portion 54 c of the outer cylindrical member 54.
  • annular boss member 61 supporting the drive plate 60 is spline fitted to the spline shaft portion 40Ra of the crankshaft 40. Then, the annular oil passage forming fitting 62 is fitted to the shaft end 40Rb on the right side of the spline shaft 40Ra and abuts on the annular boss member 61, and further the nut member 64 is attached to the shaft end 40Rb via the washer 63. By screwing and tightening, the annular member 56 and the annular boss member 61 are integrally fixed to the right side shaft portion 40R of the crankshaft 40. Therefore, the drive plate 60 supported by the annular boss member 61 rotates integrally with the crankshaft 40.
  • the drive plate 60 includes a bowl-shaped outer peripheral portion 60 a fitted to the annular boss member 61 and a flange portion 60 b developed from the open end of the bowl-shaped outer peripheral portion 60 a to the outer periphery.
  • the flange portion 60 b faces the flange portion 54 b of the outer cylindrical member 54.
  • a centrifugal clutch 70 is formed between the drive plate 60 that rotates integrally with the crankshaft 40 and the bowl-shaped clutch outer 71 fixed to the flange portion 54 b of the outer cylindrical member 54.
  • clutch shoes 73 consisting of three centrifugal weights are respectively rockably supported, and each clutch shoe 73 having a lining made of a friction material on its outer surface is With the rotation of the crankshaft 40, it is pivoted radially outward against the clutch spring 74 by centrifugal force, and when it exceeds a predetermined rotational speed, the clutch shoe 73 contacts the clutch outer 71 and the centrifugal clutch is frictionally 70 are connected, and the rotation of the crankshaft 40 is transmitted to the outer cylinder member 54.
  • a cover plate 76 covers the drive plate 60 from the right side so as to cover the opening of the bowl-shaped outer peripheral portion 60a covering the outer periphery of the nut member 64, whereby an annular space 75s is formed inside, and the centrifugal oil filter is formed. 75 can be configured.
  • the cover plate 76 is a disk-like member having a circular hole in which the shaft end 40Rb of the crankshaft 40 is fitted at the center, and the outer peripheral portion of the cover plate 76 fitted to the shaft end 40Rb is a flange portion of the drive plate 60
  • a plurality of bolts 78 pass through the outer peripheral portion of the cover plate 76 and the annular seal member 77 in the circumferential direction and are screwed into the flange portion 60b of the drive plate 60. By tightening, the cover plate 76 is attached to the drive plate 60, and the centrifugal oil filter 75 having the annular space 75s is configured.
  • a short first in-shaft oil passage 40A is bored at the shaft end portion 40Rb from the axial end surface to the axial center and the crank web 40w side
  • a long second in-shaft oil passage 40B is drilled to the front of the first in-shaft oil passage 40A at the center of the shaft.
  • the opening of the second in-shaft oil passage 40B is closed by a plug member 79.
  • a nut member 64 is screwed to be positioned at a portion of the shaft end portion 40Rb that divides the first in-shaft oil passage 40A and the second in-shaft oil passage 40B.
  • a branch oil passage 40Aa radially branched from the first in-shaft oil passage 40A is formed between the nut member 64 and the cover plate 76, and the branch oil passage 40Aa opens in the annular space 75s.
  • a lead oil passage 61a is formed between the oil passage forming fitting 62 and the outer peripheral surface of the spline shaft 40Ra.
  • the second in-shaft oil passage 40B is formed such that a branch oil passage 40Ba branched in the radial direction at its right end portion communicates with the lead-out oil passage 61a (see FIG. 5).
  • the first in-shaft oil passage 40A communicates with the second in-shaft oil passage 40B sequentially through the branch oil passage 40Aa, the annular space 75s of the centrifugal separation type oil filter 75, the lead oil passage 61a, and the branch oil passage 40Ba.
  • the centrifugal oil filter 75 rotates with the rotation of the crankshaft 40, foreign matter having a large specific gravity mixed in the oil moves from the first in-axis oil passage 40A into the annular space 75s to the outer periphery by centrifugal force. Oil separated and filtered enters the second in-shaft oil passage 40B from the outlet oil passage 61a.
  • the second in-shaft oil passage 40B in the right-side shaft 40R of the crankshaft 40 has a diameter along with the branch oil passage 40Bb branching radially toward the inner peripheral surface of the outer cylinder member 54
  • the oil filtered by the centrifugal oil filter 75 is supplied to the lubrication site where the branch oil passage 40Bc branches toward the inner peripheral surface of the primary drive gear 53 in the direction and rotates relatively.
  • the second in-shaft oil passage 40B branches from the crank web 40w toward the crank pin 40p, and the branch oil passage 40Bd branches, and the branch oil passage 40Bd communicates with the oil passage 40pa in the crank pin 40p.
  • the filtered oil is supplied from the passage 40pa to a lubrication site such as a bearing of the crank pin 40p with the connecting rod 43.
  • the present internal combustion engine E is provided with a multistage transmission 80 with a constant gear meshing type at the rear of the crankshaft 40, and the main shaft 81 and countershaft 82 of the multistage transmission 80 are arranged side by side It is rotatably supported by the crankcases 21L and 21R.
  • the main gear group 81G on the main shaft 81 and the counter gear group 82G on the counter shaft 82 mesh corresponding gears with each other.
  • a transmission clutch 85 is provided at a portion of the main shaft 81 of the multi-stage transmission 80 which penetrates the right crankcase 21R and protrudes.
  • a clutch driven outer 86 of the transmission clutch 85 is supported via a damper by a primary driven gear 84 rotatably supported by the main shaft 81 via a damper.
  • the primary driven gear 84 supporting the clutch outer 86 is supported by a crankshaft 40 Meshing with the primary drive gear 53.
  • the shift clutch 85 is a friction type multi-disc clutch having a large number of clutch plates frictionally joined or disengaged by a release mechanism operated by a driver, and when the multiple clutch plates are frictionally joined by a spring force, the clutch The torque of the outer 86 is transmitted to the clutch inner 87 integrally coupled to the main shaft 81, the transmission clutch 85 is brought into the connected state, and the friction joint of a large number of clutch plates is released. Transmission of the torque to 87 is cut off, and the shift clutch 85 is disconnected.
  • the countershaft 82 of the multi-stage transmission 80 is an output shaft, and a drive sprocket 88 is fitted to the left end of the left crankcase 21L penetrating left.
  • the drive chain 89 wound around the drive sprocket 88 is wound around the other driven sprocket (not shown) on the rear wheel 12 side, and the driving force of the internal combustion engine E is transmitted to the rear wheel 12 via the drive chain 89.
  • the motorcycle 1 travels.
  • the shift drum 90 is rotatably supported by the left and right crankcases 21L and 21R in the diagonally upper side of the front and rear main shafts 81 and the countershaft 82 supported in parallel to each other by the left and right crankcases 21L and 21R. 9 and 6).
  • lead grooves 90Aa and 90Ab for moving the shift forks 91 and 92 in the axial direction are formed on the outer peripheral surface of the cylindrical main portion 90A in the circumferential direction.
  • the left end shaft portion 90L which has an outer diameter reduced from 90A to the left and protrudes, is rotatably fitted in a bearing hole of the left crankcase 21L and supported, while a flange portion is formed at the right end of the cylindrical main portion 90A.
  • a right end shaft portion 90R having an outer diameter reduced to the right of the flange portion 90f and protruding therefrom is rotatably supported by a bearing hole of the right crankcase 21R via a needle bearing 93.
  • the bearing hole of the left crankcase 21L for supporting the left end shaft portion 90L of the shift drum 90 substantially bears on the lower half portion, and the upper half portion is hollowed and the oil is accumulated. Therefore, the right end shaft portion 90R of the shift drum 90 is supported by the needle bearing 93 interposed with the width of the bearing hole of the right crankcase 21R secured, thereby preventing the shaft drum of the shift drum 90 from being inclined and shifting The drum 90 is smoothly rotated without resistance.
  • crankshaft 40, the main shaft 81, the countershaft 82 and the shift drum 90 are rotatably supported by the left and right crankcases 21L and 21R, and the crankshaft is mounted to the right of the right crankcase 21R.
  • the centrifugal clutch 70 and the centrifugal separation type oil filter 75 provided on the right side shaft 40R protruding rightward from the right crankcase 21R of 40, and the right side shaft protruding rightward from the right crankcase 21R of the main shaft 81
  • the transmission clutch 85 is disposed (see FIG. 4). As shown in FIG. 4, the centrifugal clutch 70, the centrifugal separation oil filter 75, and the transmission clutch 85 are covered with a right crankcase cover 22R that covers the right crankcase 21R from the right.
  • FIG. 2 is a side view mainly showing the engine case 20 of the internal combustion engine E
  • FIG. 7 is the same side view of the internal combustion engine E with the right crankcase cover 22R removed from the right crankcase 21R
  • FIG. 8 is a side view showing a state in which the centrifugal clutch 70, the centrifugal separation type oil filter 75 and the transmission clutch 85 are removed from the state of FIG. 7;
  • the right crankcase 21R has an outer periphery axially extending from the outer peripheral edge of the side wall 21Rv and the side wall 21Rv perpendicular to the axial direction that supports the crankshaft 40, the main shaft 81, etc.
  • a mating surface 21Rsf portion of the dotted pattern in FIGS. 7 and 8) with the right crankcase cover 22R, which is composed of the wall 21Rs and is the right open end face of the outer peripheral wall 21Rs of the right crankcase 21R, is annularly shown. .
  • the speed change clutch 85 provided on the right side shaft portion of the formula oil filter 75 and the main shaft 81 is located (see FIG. 7).
  • an oil pump cover 111 having an oil pump 110 formed therein is attached to a side wall 21 Rv of the right crankcase 21 R obliquely below the crankshaft 40 by tightening of a bolt 113.
  • a pump driven gear 112 fitted to the pump drive shaft 110 a of the oil pump 110 meshes with a pump drive gear 51 fitted to the right shaft portion 40 R of the crankshaft 40. Therefore, the rotation of the crankshaft 40 is transmitted through the engagement of the pump drive gear 51 and the pump driven gear 112 to drive the oil pump 110.
  • FIG. 9 is a cross-sectional view vertically cut in the left-right direction at the outer peripheral wall 21Rs of the right crankcase 21R.
  • the oil pump 110 is mounted on the bottom wall 21Rsb of the outer peripheral wall 21Rs of the right crankcase 21R.
  • the oil drain hole 101 is formed in the lower part of The downward opening of the oil drain hole 101 is closed by the cap 103.
  • a wire mesh oil strainer 102 is held by the cap 103 via a spring and inserted into the oil drain hole 101.
  • the oil drain hole 101 communicates with the oil storage portion 100 formed in the bottom wall portions 21Lsb and 21Rsb of the left and right crankcases 21L and 21R, and an oil strainer held by the cap 103 and disposed in the oil drain hole 101
  • the outside (upstream side) of 102 communicates with the oil reservoir 100
  • the inside (downstream side) of the oil strainer 102 communicates with a scoop oil passage 105P (see FIG. 8) extending to the suction port of the oil pump 110. ing.
  • a discharge oil passage 115P extends from the discharge port of the oil pump 110.
  • the discharge oil passage 115P penetrates the oil pump cover 111 to the right, and forms a connection opening end surface 115a in the right side surface of the oil pump cover 111 (see FIG. 8).
  • FIG. 10 is a perspective view of the right crankcase cover 22R obliquely viewed from the back side, and the surface of the right crankcase cover 22R is shown in FIG.
  • the right crankcase cover 22R covering the right crankcase 21R from the right extends axially rightward from the peripheral edge of the side wall 22Rv and the side wall 22Rv substantially perpendicular to the axial direction of the crankshaft 40, as shown in FIG. It is formed in a rectangular bowl shape by the outer peripheral wall 22Rs.
  • the left open end face of the outer peripheral wall 22Rs becomes a mating surface 22Rsf and is mated with the mating surface 21Rsf of the right crankcase 21R, and the centrifugal clutch 70, the centrifugal oil filter 75 and the transmission clutch 85 are inside.
  • the centrifugal clutch 70, the centrifugal oil filter 75 and the transmission clutch 85 are inside.
  • the side wall 22Rv closing the right opening of the outer peripheral wall 22Rs of the right crankcase cover 22R forms a circular side wall 22Rva in which the portion facing the centrifugal clutch 70 and the centrifugal oil filter 75 further bulges rightward.
  • a cylindrically projecting bearing portion 143 is formed at the center of the circular side wall portion 22Rva, and the shaft end 40Rb of the right side shaft portion 40R of the crankshaft 40 is freely rotatable in the bearing hole 143A inside the bearing portion 143 It is inserted (see FIG. 5). Therefore, as shown in FIG.
  • the shaft end opening of the first in-shaft oil passage 40A formed in the shaft end 40Rb of the right shaft portion 40R of the crankshaft 40 inserted in the bearing hole 143A is in the bearing hole 143A.
  • the first in-shaft oil passage 40A and the bearing hole 143A communicate with each other.
  • a plurality of ribs extend radially from the bearing portion 143, and an oil passage 142P is formed in a relatively wide rib 142 extending forward thereof.
  • a cylindrical rib 141 is formed on the inner surface of the front wall of the outer peripheral wall 22Rs of the right crankcase cover 22R so as to be directed in the left-right direction which is the axial direction of the crankshaft 40
  • the right end of the oil passage 141P communicates with the front end of the oil passage 142P of the rib 142, and the left end of the cylindrical rib 141 is a connection opening end surface 141a.
  • An oil filter 120 incorporating a filter element is provided on the lower front side of the outer peripheral wall 22Rs of the right crankcase cover 22R (see FIGS. 2 and 10).
  • filter housing 121 having a cylindrical shape of oil filter 120 at corner wall 22Rsc between front wall 22Rsa and bottom wall 22Rsb in outer peripheral wall 22Rs of right crankcase cover 22R. Is formed with a part projecting outward.
  • a cylinder block 23 projects forward from the front wall of the right crankcase 21R which constitutes the front wall of the engine case 20 together with the front wall 22Rsa of the right crankcase cover 22R.
  • the cylindrical filter housing 121 is opened to the right, and the filter element 123 is inserted inside, and the opening is closed by the lid member 122.
  • the lid member 122 is fixed to the filter housing 121 by a bolt 124.
  • the oil filter 120 is provided on a corner wall 22Rsc of an outer peripheral wall 22Rs of the right crankcase cover 22R so as to partially project obliquely downward (see FIG. 2). As shown in FIG. 2, the oil filter 120 has an upper end at substantially the same height as the lower surface of the cylinder block 23, and is located above the lower surface of the bottom wall 22Rsb of the outer peripheral wall 22Rs of the right crankcase cover 22R. ing.
  • the position of the oil filter 120 is arranged at a lower position than the oil pump 110. Further, as shown in FIG. 3, the lid member 122 at the right end of the oil filter 120 is recessed leftward from the right outer side surface of the circular sidewall 22Rva of the right sidewall of the right sidewall 22Rv of the right crankcase cover 22R.
  • a part of the upper side wall of cylindrical filter housing 121 of oil filter 120 bulges upward to form an inflow cylindrical portion 125 extending leftward.
  • the left end of the inflow cylindrical portion 125 is the connection opening end face 125 a, and the right end of the inflow oil passage 125 P inside the inflow cylindrical portion 125 communicates with the inside of the filter housing 121.
  • the outflowing oil passage 126P extending leftward from the center of the left side wall which is the bottom wall of the filter housing 121 is bent upward and then bent further to the left after passing through the inside of the outflowing cylindrical portion 126. It is open at the connection opening end face 126 a at the left end of the portion 126.
  • connection opening end surface 125a of the inflow cylindrical portion 125 is the right crankcase cover. It is on the same plane as the mating surface 22Rsf of 22R.
  • the right crankcase 21R covered by the right crankcase cover 22R is, as shown in FIG. 8, a connection opening end face opened in the right side surface of the discharge oil passage 115P formed in the oil pump cover 111 constituting the oil pump 110.
  • a position 115a is opposite to the connection opening end face 125a of the inflow cylindrical portion 125 of the right crankcase cover 22R.
  • a cylindrical rib 131 oriented in the left-right direction having the connection opening end surface 131a at the right end is provided on the outer peripheral wall 21Rs at a position opposite to the connection opening end surface 126a of the outflow cylindrical portion 126 It is formed along (see FIG. 8).
  • an oil passage 132P extends upward crossing the oil passage 131P inside the cylindrical rib 131, and an oil passage 133P intersects the upper end of the oil passage 132P in a diagonal longitudinal direction. It extends.
  • the oil passage 133P extends obliquely forward to the mating surface of the cylinder block 23 and the right crankcase 21R, and a cylindrical rib 134 forming an oil passage 134P branched rightward on the way along the outer peripheral wall 21Rs. It extends rightward (see FIG. 11) and forms a connecting opening end face 134a in the mating surface 21 Rsf (see FIG. 8).
  • the oil passage 133P when the oil passage 133P reaches the mating surface of the cylinder block 23 and the right crankcase 21R, the oil passage 133P is bent to communicate with the oil passage 135P extending upward in a circular arc around the cylinder along the mating surface. Is communicated with an oil passage 136P parallel to the cylinder axis Lc and extending toward the cylinder head 24, and oil is supplied to the valve system through the oil passages 135P and 136P.
  • connection opening of the discharge oil passage 115P on the right crankcase 21R side The end surface 115a, the connection opening end surface 131a of the oil passage 131P, and the connection opening end surface 134a of the oil passage 134P respectively correspond to the connection opening end surface 125a of the inflow oil passage 125P on the right crankcase cover 22R side and the connection opening end surface of the outflow oil passage 126P.
  • the fluid passage 126a and the connection opening end surface 141a of the oil passage 141P are brought into fluid tight contact with each other, and the corresponding oil passages communicate with each other.
  • FIG. 11 is a perspective view seen through the oil circulation path (the portion shown by the dotted pattern in FIG. 11) in the present internal combustion engine E.
  • the oil accumulated in the oil reservoirs 100 of the left and right crankcases 21L and 21R is removed of a relatively large foreign matter through the oil strainer 102 in the oil drain hole 101 by the drive of the oil pump 110. It is pumped up through the pumping oil passage 105P.
  • the oil discharged from the oil pump 110 passes through the discharge oil passage 115P, enters the inflow oil passage 125P on the right crankcase cover 22R side and flows into the oil filter 120, and the filter element 123 causes fine foreign matter such as sludge and metal powder. It is removed and flows out through the outflow oil passage 126P.
  • the oil that has flowed out through the outflow oil passage 126P enters the oil passage 131P on the right crankcase 21R side, then passes through the oil passage 132P extending in the vertical direction, and bends and enters the oil passage 133P extending in the front-rear direction.
  • the oil branched into the oil passage 134P branched from the oil passage 133P enters the oil passage 141P on the right crankcase cover 22R side, and then bends and passes through the oil passage 142P of the rib 142 directed radially of the circular side wall 22Rva.
  • the oil that has entered bearing hole 143A flows into first in-shaft oil passage 40A of right shaft portion 40R of crankshaft 40, and further from annular oil passage 40Aa to the annular shape of centrifugal oil filter 75.
  • the foreign matter having a high specific gravity such as metal powder which has been mixed into the oil is separated by centrifugal force by the rotation of the centrifugal oil filter 75 into the space 75s, and the filtered oil is separated from the oil passage 61a in the second axis. Enter oil passage 40B.
  • the oil filter 120 is provided so as to protrude from the right crankcase cover 22R. Therefore, at the time of maintenance, the bolt 124 is removed, the lid member 122 is removed, and the filter element 123 in the filter housing 121 is removed. The maintenance work is extremely easy if the filter element is replaced with a new filter element and the lid member 122 is closed.
  • the first embodiment of the lubricating structure for an internal combustion engine according to the present invention described in detail above has the following effects.
  • a lubrication structure of an internal combustion engine E in which a centrifugal separation type oil filter 75 is provided on a right side shaft portion 40R in which a right crankcase 21R of a crankshaft 40 protrudes laterally as shown in FIG. Since the oil filter 120 incorporating the filter element 123 is provided in the oil passage extending from the oil pump 110 for pumping up the oil to the centrifugal separation type oil filter 75, the total oil volume as the oil filter is significantly increased and the frequency of maintenance Can be reduced.
  • the oil filter 120 is a replacement operation of the filter element rather than the centrifugal separation type oil filter 75 which performs cleaning work in maintenance, so maintenance is easy, and by performing simple maintenance of the oil filter 120, troublesome centrifugal The maintenance of the separation type oil filter 75 can be extremely infrequent and the labor can be greatly reduced.
  • the oil filter 120 is provided on the outer peripheral wall 22Rs which is the outer wall of the right crankcase cover 22R, there is no cover member covering the oil filter 120 from the outside, and the cover member is removed.
  • the oil filter 120 can be maintained more easily and in a shorter time without work.
  • the oil filter 120 is provided on the outer peripheral wall 22Rs which is the outer wall of the right crankcase cover 22R, and the centrifugal oil filter 75 attached to the right shaft portion 40R of the crankshaft 40 Since the shaft 40 is disposed at a position not overlapping in the axial direction, the axial width of the crankshaft 40 of the internal combustion engine E can be suppressed to miniaturize the internal combustion engine.
  • the oil filter 120 is provided on the relatively strong outer peripheral wall 22Rs of the right crankcase cover 22R, whereby the oil filter 120 is firmly provided and the outer peripheral wall 22Rs Strength and rigidity of the Further, the oil filter can be provided without expanding the width in the vehicle body width direction (axial direction of the crankshaft) of the internal combustion engine E, and the enlargement of the internal combustion engine can be avoided.
  • the oil filter 120 is provided so that a part thereof protrudes outward of the outer peripheral wall 22Rs in the axial direction of the crankshaft 40. Therefore, the oil filter 120 protrudes from the outer peripheral wall 22Rs In addition, the penetration of the outer peripheral wall 22Rs by the oil filter 120 can be reduced to avoid interference with the internal structure.
  • the cylinder block 23 is provided so as to protrude substantially horizontally from the left and right crankcases 21L and 21R so that the cylinder axis Lc is substantially horizontal.
  • the front wall of the engine case 20 is configured together with the front wall 22Rsa of the right crankcase cover 22R.
  • the oil filter 120 can be disposed in a dead space near the lower portion of the cylinder block 23 projecting forward from the front wall portion of the right crankcase 21R near the right crankcase cover 22R (see FIGS. 2 and 3). That is, it is possible to suppress that the oil filter 120 protrudes up and down when viewed in the crankshaft direction.
  • the oil filter 120 is positioned above the lower surface of the bottom wall 21Rsb of the left and right crankcases 21L and 21R in the engine case 20, so the oil filter 120 is below the lower surface of the bottom wall 21Rsb. Since the oil filter 120 does not protrude, the necessary distance from the ground of the internal combustion engine E can be easily secured.
  • the oil filter 120 is disposed below the oil pump 110, and therefore, when the internal combustion engine E stops operating, the oil filter 120 is disposed below the stopped oil pump 110. Since the oil filter 120 is maintained filled with oil, the oil can be circulated without delay at the time of restart.
  • the oil filter 120 is provided on the crankcase cover (right crankcase cover 22R) of the engine case 20, but an oil filter is provided on the crankcase.
  • a second embodiment of the present invention will be described based on FIG.
  • the internal combustion engine E according to the second embodiment is almost the same as the internal combustion engine E according to the first embodiment except for the structure in which the oil filter is provided on the right crankcase.
  • the members other than 220 are denoted by the same reference numerals.
  • the oil passage flowing in and out of the oil filter 220 incorporating the filter element is different.
  • the right crankcase 201 includes an axially perpendicular side wall 201v for supporting the crankshaft 40, the main shaft 81, etc., and an outer peripheral wall 201s extending axially from the outer peripheral edge of the side wall 201v.
  • a mating surface 201sf (a part of the dotted pattern in FIG. 12) with the right crankcase cover, which is the right opening end face of the outer peripheral wall 201s of the right crankcase 201, is annularly shown.
  • An oil filter 220 is provided on the lower front side of the outer peripheral wall 201 s of the right crankcase 201.
  • a cylindrical filter housing 221 is formed with a part thereof projecting outward at a corner wall portion 201sc between the front wall portion 201sa from the cylinder block 23 on the outer peripheral wall 201s of the right crankcase 201 and the bottom wall portion 201sb.
  • the filter housing 221 is open to the right, and the filter element 223 is inserted inside, and the opening is closed by the lid member 222.
  • the lid member 122 is fixed to the filter housing 221 by bolts 224.
  • the mating surface 201sfa of the corner wall portion 201sc is a filter housing 221 formed by projecting a part of the corner wall portion 201sc to the outside as shown in FIG. Is formed so as to be recessed inward along the outer peripheral surface of the inner side (crankshaft 40 side). Therefore, the right crankcase cover (not shown) has a mating surface opposed to the mating surface 201sf of the right crankcase 201, and covers the right side of the right crankcase 201 by avoiding the oil filter 220 outward.
  • the oil filter 220 is provided on the corner wall portion 201sc of the outer peripheral wall 201s of the right crankcase 201, maintenance of the oil filter 220 can be performed by removing the lid member 122 exposed to the outside without removing the right crankcase cover. Can be replaced to replace the filter element 223 inside, which is a simple operation.
  • the oil filter 220 is provided in the oil passage from the oil pump to the centrifugal separation type oil filter 75, the total oil volume as the oil filter is significantly increased, and the frequency of maintenance can be suppressed.
  • the cumbersome maintenance of the centrifugal oil filter 75 can be made extremely infrequent and the labor can be greatly reduced.
  • the oil filter 220 is provided on the outer peripheral wall 201s of the right crankcase 201, maintenance of the oil filter 220 can be performed more easily and in a short time without removing the cover member.
  • the oil filter 220 is disposed at a position not overlapping with the centrifugal oil filter 75 and the crankshaft 40 in the axial direction, so the axial width of the crankshaft 40 of the internal combustion engine E is suppressed to reduce the size of the internal combustion engine Can be implemented.
  • the oil filter 220 is provided on the relatively strong outer circumferential wall 201s of the right crankcase 201, whereby the oil filter 220 is firmly provided, and the strength and rigidity of the outer circumferential wall 201s can be further improved.
  • the oil filter 220 is partially provided so as to protrude to the outside of the outer peripheral wall 201s, and therefore, the projection from the outer peripheral wall 201s by the oil filter 220 is made as small as possible, and the inner side of the outer peripheral wall 201s by the oil filter 220 The penetration can also be reduced to avoid interference with the internal structure.
  • the oil filter 220 is provided on the corner wall portion 201sc between the front wall portion 201sa of the outer peripheral wall 201s of the right crankcase 201 where the cylinder block 23 projects forward and the bottom wall portion 201sb, so the oil filter 220 is located below the cylinder block 23
  • the oil filter 120 can be disposed in a dead space close to the right crankcase 201 in FIG. That is, it is possible to suppress that the oil filter 220 protrudes up and down as viewed in the crankshaft direction. Since the oil filter 220 is located above the lower surface of the bottom wall portion 201 sb of the right crankcase 201 in the engine case 20, the necessary distance from the ground of the internal combustion engine E can be easily secured.
  • the oil filter 220 can be disposed below the oil pump and can circulate oil without delay at restart.
  • the internal combustion engine E according to the third embodiment is almost the same as the internal combustion engine E according to the first embodiment except for the structure in which the oil filter is provided on the right crankcase.
  • the members other than 320 are denoted by the same reference numerals.
  • the right crankcase 301 includes the side wall 301v and the outer peripheral wall 301s, and from the front wall portion 301sa from which the cylinder block 23 in the outer peripheral wall 301s protrudes.
  • An oil filter 320 incorporating a filter element is provided in the corner wall 301sc between the bottom wall portion 301sb, but unlike the second embodiment, the filter of the oil filter 320 is formed on the outer surface of the corner wall 301sc.
  • a filter mounting seat 302 to which the case 321 is attached is formed.
  • the bottomed cylindrical filter case 321 has the filter element 323 housed inside, and the flange portion 321 f at the open end is fastened to the filter mounting seat 302 by the bolt 324.
  • the filter mounting seat 302 is on the outer surface of the outer peripheral wall 301s (corner wall portion 301sc) of the right crankcase 301, and a mating surface 301sf with the right crankcase cover which is the right opening end face of the outer peripheral wall It is in a different place from the dot pattern).
  • the maintenance of the oil filter 320 can be carried out by a simple operation since the filter element 323 inside can be replaced if the filter case 321 exposed to the outside is removed without removing the right crankcase cover.
  • the same effects as the effects exhibited in the second embodiment can be achieved.
  • E Internal combustion engine, 1: Motorcycle, 20: Engine case, 21L: Left crankcase, 22L: Left crankcase cover, 21R: right crankcase, 21Rv: side wall, 21Rs: outer peripheral wall, 21Rsb: bottom wall portion, 21Rsf: mating surface, 22R: right crank case cover, 22Rv: side wall, 22Rva: circular side wall portion, 22Rs: outer peripheral wall, 22Rsa: front wall portion, 22Rsb: bottom wall portion, 22Rsc, corner wall portion, 22Rsf, mating surface, 23 ... cylinder block, 24 ...
  • lid member 123 ... filter element, 124 ... bolt, 125 ... inflow cylindrical portion, 125P ... inflow oil passage, 126 ... outflow cylindrical portion, 126P ... outflow oil passage, 131 ... 131 Cylindrical rib, 131P, 132P, 133P: oil passage, 134: cylindrical rib, 134P: oil passage, 135P, 136P: oil passage, 141: cylindrical rib, 141P, 142P: oil passage, 142: rib, 143 ... Bearing section, 143A ...
  • 201 right crank case, 201s: outer peripheral wall, 201sa: front wall, 201sb: bottom wall, 201sc: corner wall, 201sf: mating surface, 220: oil filter, 221: filter housing, 222, lid member, 223 ... filter element, 224 ... bolt, 301 ... right crank case, 301s ... outer peripheral wall, 301sa ... front wall, 301sb ... bottom wall, 301sc ... corner wall, 301sf ... mating surface, 302 ... filter mounting seat, 320 ... oil filter, 321 ... filter case, 323 ... filter element, 324 ... bolt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
PCT/JP2016/078440 2016-09-27 2016-09-27 内燃機関の潤滑構造 WO2018061085A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2018541755A JP6632734B2 (ja) 2016-09-27 2016-09-27 内燃機関の潤滑構造
PCT/JP2016/078440 WO2018061085A1 (ja) 2016-09-27 2016-09-27 内燃機関の潤滑構造
BR112019005208-9A BR112019005208B1 (pt) 2016-09-27 2016-09-27 Estrutura de lubrificação de motor de combustão interna
CN201680089417.7A CN109790767B (zh) 2016-09-27 2016-09-27 内燃机的润滑构造
PH12019500566A PH12019500566A1 (en) 2016-09-27 2019-03-15 Lubrication structure of internal combustion engine

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JP2000504808A (ja) * 1996-02-20 2000-04-18 フイルテルウエルク マン ウント フンメル ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 分離装置
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CN100501137C (zh) * 2007-04-25 2009-06-17 佛山市顺德德力柴油机有限公司 一种立式单缸柴油机
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JP5100527B2 (ja) * 2008-06-18 2012-12-19 本田技研工業株式会社 エンジンのオイルフィルタ装置
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JPH0454912U (pt) * 1990-09-18 1992-05-12
JP2000504808A (ja) * 1996-02-20 2000-04-18 フイルテルウエルク マン ウント フンメル ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 分離装置
JPH10141039A (ja) * 1996-11-13 1998-05-26 Honda Motor Co Ltd 内燃機関の潤滑装置
JP2010151003A (ja) * 2008-12-25 2010-07-08 Honda Motor Co Ltd 小型エンジンの遠心分離装置

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PH12019500566A1 (en) 2019-11-18
JP6632734B2 (ja) 2020-01-22
BR112019005208B1 (pt) 2023-01-10
JPWO2018061085A1 (ja) 2019-06-24
CN109790767A (zh) 2019-05-21
CN109790767B (zh) 2021-02-09

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