WO2003104621A1 - 鞍乗型車両におけるエンジンのブローバイガス還元装置 - Google Patents
鞍乗型車両におけるエンジンのブローバイガス還元装置 Download PDFInfo
- Publication number
- WO2003104621A1 WO2003104621A1 PCT/JP2003/007300 JP0307300W WO03104621A1 WO 2003104621 A1 WO2003104621 A1 WO 2003104621A1 JP 0307300 W JP0307300 W JP 0307300W WO 03104621 A1 WO03104621 A1 WO 03104621A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cover
- crankcase
- engine
- wall
- vehicle
- Prior art date
Links
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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
Definitions
- the present invention relates to a blow pie gas reduction device for an engine in a straddle-type vehicle in which a breather chamber is provided in a crankcase of the engine.
- a breather chamber for separating mist-like oil mixed in blow-by gas from blow pie gas is provided in a cylinder head.
- the reason why the breather chamber is provided in the cylinder head is that the breather chamber is adjacent to the valve operating chamber and the space for passing the timing chain (the space extending from the inside of the crankcase to the cylinder head side). This is because both the blow-by gas in the valve operating cam chamber and the blow-by gas in the crankcase can be easily introduced.
- the engine of a scooter-type motorcycle is configured such that a cylinder protrudes from the crankcase toward the front of the vehicle, such as a storage box or a fuel tank located near the front end of the cylinder head.
- a cylinder protrudes from the crankcase toward the front of the vehicle, such as a storage box or a fuel tank located near the front end of the cylinder head.
- the cylinder head In order to avoid interference with the cylinder head, it is required to make the cylinder head as compact as possible. For this reason, it is difficult to provide a breather chamber in a cylinder head in a scooter-type motorcycle engine.
- a breather chamber near the crankcase as disclosed in, for example, Japanese Patent Publication No. 2001-653226.
- a V-belt type continuously variable transmission is provided on one side of a crankcase. Is provided between an outer wall of the crankcase extending along the V-belt continuously variable transmission and an inner wall of the V-belt continuously variable transmission facing the outer wall.
- a breather chamber is formed.
- crankcase and the transmission case of the V-belt type continuously variable transmission are integrally formed, and the two opposing side walls are formed as described above. not exist. Therefore, when a breather chamber is to be formed near the crankcase, a cover for forming the breather chamber may be attached to the crankcase or the transmission case. However, in this case, the outer shape of the engine is enlarged by the size of the cover.
- the present invention has been made in view of the above circumstances, and has as its object to provide a breather chamber near a crankcase while reducing the size of an engine.
- a rotary catcher is provided at an upper end portion of an outer wall of a cover attached to a side portion of a crankcase so that an axial direction thereof is parallel to a width direction of a vehicle.
- a boss provided inside the cover is rotatably supported, and a breather chamber is formed around the boss.
- the boss is formed to have a minimum necessary size to reduce the weight of the cover, the boss is provided inside the portion of the cover where the rotary catcher is attached.
- a dead space is formed so as to surround the boss. Since the dead space is used to form the pre-chamber, the cover can be formed more compactly than when the space exclusively functioning as the pre-chamber is provided in the cover. Therefore, a breather chamber can be provided near the crankcase while reducing the size of the engine.
- the force par for attaching the rotary accessory has a structure covering the flywheel magneto, and the catcher is provided radially outward of the flywheel magneto, and the flywheel magneto is attached to the flywheel magneto.
- a capturing wall extending from the outer wall of the cover to the inside of the vehicle so as to face the outer peripheral surface, and a lid connected to an end of the reinforcing wall inside the vehicle and extending in a direction orthogonal to the width direction of the vehicle.
- the preserving chamber may be separated from the space in the cover by a member.
- a cover portion for attaching the auxiliary device that is, the outer peripheral surface of the flywheel magneto. It is preferable to provide a capturing wall at a portion of the cover opposite to the cover. Since the breather chamber is formed by using the capturing wall, the wall for forming the breather chamber does not have to be protruded from the cover, and the cover can be easily manufactured and the manufacturing cost can be reduced. can do.
- Fig. 1 is a side view of a motorcycle engine equipped with a blow-by gas reduction device.
- Figure 2 is a side view of the engine with the crankcase cover removed.
- FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
- Fig. 4 is a side view of the crankcase force par seen from the inside.
- FIG. 5 is a perspective view of the upper part of the crankcase force par as viewed from the inside.
- FIG. 6 is a perspective view showing a state where a lid member is attached to an upper part of the crankcase cover.
- reference numeral 1 denotes a motorcycle engine as an example of a saddle type vehicle, and the engine 1 is equipped with a professional gas reduction device. Note that the left and right described below refer to the width direction of the vehicle toward the front in the traveling direction of the vehicle.
- the engine 1 is of a unit swing type mounted on a starter 2, and is provided with a crankcase 3 and a cylinder 4 protruding forward from the crankcase 3 in the front-rear direction of the vehicle.
- a transmission case 6 is provided extending to the left and right of the rear wheel 5 in the front-rear direction of the vehicle and supported by the crankcase 3.
- the rear wheel 5 is supported by the transmission case 6 and a rear arm 7 extending rearward from the crankcase 3 to the right of the rear wheel 5.
- the engine 1 is vertically swingably supported by a vehicle body frame via a link (not shown) connected to a connection boss 8 at the upper end of the crankcase 3. Further, the rear end of the transmission case 6 and the rear end of the rear arm 7 are respectively connected to the vehicle body frame via the cushion unit 9.
- the cylinder 4 is of a DOHC type in which an intake camshaft 12 and an air camshaft 13 are provided on a cylinder head 11.
- An intake device (not shown) is connected to the upper surface of 1, and an exhaust pipe 14 is connected to the lower surface of the cylinder head 11.
- the intake and exhaust camshafts 12 and 13 are provided in front of the engine 1 with the rotation of the crankshaft 15 (see FIG. 2) being transmitted via a camshaft chain 16.
- the fuel tank shown at 17 is a fuel tank.
- the one indicated by reference numeral 18 arranged in front of 17 of this fuel tank Is the radiator.
- a storage box 19 is provided above the engine 1.
- the storage box 19 is formed so that two helmets (not shown) can be stored therein, and the upper access opening is opened and closed by a seat.
- Two helmet storage sections in the storage box 19 are denoted by reference numerals 19a and 19b.
- reference numeral 20 denotes a cylinder body
- reference numeral 21 denotes a head cover.
- the crankcase 3 is formed so as to be able to be divided into a left half 22 and a right half 23. It is rotatably supported by.
- a drive bulging force S of a V-belt type continuously variable transmission (not shown) is provided, and the crankshaft protruding rightward from the crankcase 3.
- a flywheel magneto 25 is supported at the right end of 15.
- the V-belt type continuously variable transmission is the same as that used in the conventional unit swing type engine for the starter, and is housed in the transmission case 6 formed integrally with the left crankcase half 22. Then, the rotation of the crankshaft 15 is transmitted to the rear wheel 5 side.
- the flywheel magneto 25 is housed inside a crankcase cover 26 attached to the right end of the right crankcase half 23, and the crankcase cover 26 has a stator 25a (FIG. 6). Is fixed.
- the crankcase 3 has a starter motor 27 and a balancer 28 at the upper end and an oil pan 29 at the lower part.
- the output end 27 a of the starter motor 27 is supported on the front upper end of the right half 23 of the crankcase, and the output end 27 a of the starter motor 27 is transmitted to the crankshaft 15 for the starter motor. It is connected via a gear 30.
- the transmission gear 30 includes an output capuon 27 b of a starter motor 27 and this pinion.
- a two-stage gear 3 2 having a first gear 3 1 that is combined with 27 and a large-diameter gear 3 4 of a crankshaft 15 that is combined with a second gear 33 of this two-stage gear 32 It is configured.
- the parser 28 is provided with a rooster 3 at the rear upper portion of the crankcase 3.
- a balance weight 28a is located between the crank webs 15a and 15a of the crankshaft 15.
- both ends of the balancer shaft 28b are rotatably supported by the two halves 22, 23 of the crankcase 3 by bearings 28c.
- a transmission gear 36 for driving the balancer 28 is connected to a right end portion of the balancer shaft 28 b and located in the crank chamber 35, and is connected to the transmission gear 36 via the transmission gear 36. Power is transmitted from the crankshaft 15 to rotate.
- the right end of the balancer shaft 28 b penetrates the right crankcase half 23 and projects outside the crankcase 3.
- a chain 37 for driving the oil pump is connected to the right end of the balancer shaft 28 b, and the rotating shaft of the cooling water pump 38
- the chain 37 is configured to extend rearward and downward, and transmits the rotation of the balancer shaft 28 b to an intermediate shaft 40 for driving an oil pump below the crankcase 3.
- the intermediate shaft 40 is connected to an input shaft (not shown) of the oil pump 41 via gears 42 and 43. That is, the rotation of the balancer 28 is transmitted to the oil pump 41 via a transmission system including the chain 37 ⁇ intermediate shaft 40 ⁇ gears 42, 43.
- the oil pump 41 By operating the oil pump 41, the oil in the oil pan 29 is supplied to the lubricated parts of the crankshaft 15 and other rotating members.
- crankcase cover 26 attached to the right half 23 of the crankcase 3 forms one side wall of the oil pan 29 in the crankcase 3 as shown in FIG.
- the cooling water pump 38 is attached to the upper end of a. K
- the inside of the rank case cover 26 is communicated with the crank chamber 35 through a communication hole 44 (see FIG. 2) formed in the right crankcase half 23.
- crankcase cover 26 bears the right end of the crankshaft 15 as a bearing.
- a boss that supports the two-stage gear 32 is indicated by reference numeral 47.
- the cooling water pump 38 is connected to the balancer shaft 28 b and extends in the width direction of the vehicle. It comprises an impeller 148 mounted thereon, a pump nozzle, a housing 50 and the like forming a pump chamber 49 in cooperation with an outer wall 26a of the crankcase cover 26.
- the rotating shaft 39 has a boss integrally projecting inward from the crankcase cover 26.
- Bearing 51 is rotatably supported by bearing 52, and penetrates outer wall 26 a of crankcase cover 26.
- a seal member is provided between the inner surface of the boss 51 and the outer surface of the bearing 52.
- the seal member 53 prevents engine coolant from entering the crankcase cover 26.
- the pump housing 50 is fixed by a fixing port 54 while being joined to a mounting seat 26b of the outer wall 26a.
- the mounting seat 26 b is formed around a rotation shaft penetrating portion (boss 51) in the outer side wall 26 a.
- the boss 51 is formed integrally with a capturing wall 61 located radially outward of the flywheel magneto 25.
- the reinforcing wall 61 is for improving the rigidity of the crankcase cover 26 so that the cooling water pump 38 can be firmly fixed to the crankcase power par 26. . As shown in FIG.
- the capturing wall 61 extends from the outer wall 26 a of the crankcase force par 26 to the inside of the vehicle so as to face the outer peripheral surface 25 a of the flywheel magneto 25. (Inside of 26). As shown in FIG. 4, the capture wall 61 has a diameter of the flywheel magneto 25 from the boss 47 supporting the two-stage gear 32 to the rear end of the crankcase cover 26. It is formed so as to extend in an arc outside the direction. As shown in FIG. 5, between the reinforcing wall 61 and the upper wall 26c of the crankcase cover 26, and between the boss 51 and the upper wall 26c, The ribs 6 2 — 65 are provided.
- a space S opened toward the inside of the vehicle is formed.
- This space S is composed of a space around a boss 51 that supports the rotating shaft 39 of the cooling water pump 38, and a space around the boss 47 that supports the two-stage gear 32.
- the bosses 47, 51 are formed so as to have a minimum size necessary for reducing the weight of the crankcase cover 26, and these bosses 47, 51 are formed. Since the formed area is smaller than the necessary portion of the outer wall 26a of the crankcase force par 26, the space S is formed around the bosses 47 and 51 as described above.
- the necessary part is a boss 51 supporting the rotating shaft 39, a rear upper extension part 66 (see FIG. 4) for forming a mounting seat 26b for mounting the pump housing 50.
- the boss 47 supporting the two-stage gear 32 extends frontward and upward facing the starter motor mounting seat 67 (see FIG. 2) of the right crankcase half 23.
- Part 68 (see Figure 4).
- the rotary catcher according to the present invention includes the cooling water pump 38 and a starter motor. 27, but may be composed of only one of them.
- the space S an open portion on the vehicle inner side is closed by a cover member indicated by reference numeral 71 in FIGS. 3, 4, and 6, and the space is formed by the cover member 71 and the reinforcing wall. 6 1 separates it from other spaces in the crankcase cover 26.
- the space S partitioned from the space inside the crankcase force par 26 constitutes the breather chamber 72 according to the present invention.
- a part of the lid member 71 is cut away so that the inside of the breather chamber 72 is exposed.
- the lid member 71 is formed so as to extend from the upper wall 26 c and the rear wall 26 d (the wall at the right end in FIG. 4) of the crankcase cover 26 to the inside of the cover. 1 is fixed to the crankcase cover 26 by a fixing port 73 while being connected to the inner end of the vehicle. As shown in FIG. 3, a portion of the lid member 71 corresponding to the rotating shaft 59 has a cylinder 71 a formed in a body, and a sealing member 74 is provided on the cylinder 71 a.
- the balancer shaft 28b penetrates through.
- a lower portion 7 1b of the lid member 71 located below the lower end of the reinforcing wall 61 has a rectangular cross section in cooperation with the rear wall 26 d and the outer wall 26 a of the crankcase cover 26.
- the oil passage 75 is formed in an L-shaped cross section so as to be configured. The upper end of the oil passage 75 is communicated with the breather chamber 72 via a communication passage (see FIGS. 4 and 5).
- the breather chamber 72 is connected to the crankcase force par 26 via an inlet 76 (see FIG. 6) formed by a gap formed between the front end of the lid member 71 and the first reinforcing rib 62.
- an inlet 76 shown in Fig. 5, a hose joint 77 connected to the upper wall 26c of the crankcase force par 26 and a hose connected to the hose joint 77 ) Is connected to the intake passage through
- the second reinforcing rib 63 positioned in the However, it is formed low so as to form a gap between the cover member 71.
- the third and fourth reinforcing ribs 64, 65 have a connection surface 78 contacting the cover member 71, a ventilation portion 79 lower than the connection surface 78, and an oil passage portion 80. Are formed.
- the ventilation part 79 is for allowing the blow pie gas to flow between the lip for capture, and the oil passage part 80 is a reinforcing rib 62 2-6 in the blister chamber 72. According to the blow pie gas reducing device having the breather chamber 72 configured as described above, the intake air from the intake device is provided.
- the blow-by gas in the crankcase cover 26 flows from the inlet 76 between the first reinforcing rib 62 and the lid member 71 from the breather chamber 72. Flows into.
- the blow pie gas flows in the breather chamber 72 through a gap formed between the second to fourth reinforcing ribs 63-65 in the pre-chamber 72 and the lid member 71. It is sucked into the hose joint 77 and guided to the intake passage through a hose (not shown).
- the breather chamber 72 is formed using the space S formed inside the crankcase cover 26 so as to surround the bosses 47 and 51, that is, the dead space.
- the crankcase cover 26 is more compact than when the space that functions as a room is provided in the crankcase cover 26. Can be formed.
- the breather chamber 72 is formed by using the capturing wall 61 for improving the rigidity of the cover 26. Therefore, the wall for forming the breather chamber does not need to protrude from the crankcase cover 26. For this reason, the number of walls provided on the crankcase cover 26 can be reduced as much as possible, and the manufacture of the crankcase cover 26 is facilitated.
- the vehicle may be a three- or four-wheeled vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004511667A JPWO2003104621A1 (ja) | 2002-06-10 | 2003-06-09 | 鞍乗型車両におけるエンジンのブローバイガス還元装置 |
AU2003242111A AU2003242111A1 (en) | 2002-06-10 | 2003-06-09 | Blow-by gas reduction device for engine of saddle riding- type motor vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002168605 | 2002-06-10 | ||
JP2002-168605 | 2002-06-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003104621A1 true WO2003104621A1 (ja) | 2003-12-18 |
Family
ID=29727695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007300 WO2003104621A1 (ja) | 2002-06-10 | 2003-06-09 | 鞍乗型車両におけるエンジンのブローバイガス還元装置 |
Country Status (5)
Country | Link |
---|---|
JP (2) | JPWO2003104621A1 (ja) |
CN (1) | CN100339569C (ja) |
AU (1) | AU2003242111A1 (ja) |
TW (1) | TWI243228B (ja) |
WO (1) | WO2003104621A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006046324A (ja) * | 2004-07-08 | 2006-02-16 | Yamaha Motor Co Ltd | パワーユニット |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5568890B2 (ja) * | 2009-06-02 | 2014-08-13 | スズキ株式会社 | 自動二輪車エンジンのオイルブリーザ装置 |
JP6121207B2 (ja) * | 2013-03-25 | 2017-04-26 | 本田技研工業株式会社 | Ohc型内燃機関の可変動弁装置 |
JP6356459B2 (ja) * | 2014-03-31 | 2018-07-11 | 本田技研工業株式会社 | 鞍乗り型車両 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56121812A (en) * | 1980-02-29 | 1981-09-24 | Yamaha Motor Co Ltd | Breather device in engine crankcase |
JPS6413212U (ja) * | 1987-05-25 | 1989-01-24 | ||
US5078105A (en) * | 1988-10-21 | 1992-01-07 | Yamaha Hatsudoki Kabushiki Kaisha | Engine for vehicle |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5650085Y2 (ja) * | 1978-03-28 | 1981-11-24 | ||
JPS6413212A (en) * | 1987-07-03 | 1989-01-18 | Sharp Kk | Rotary head drum |
JPH02149809A (ja) * | 1988-12-01 | 1990-06-08 | Sumitomo Electric Ind Ltd | 光ケーブル用管路 |
JP2851093B2 (ja) * | 1989-12-28 | 1999-01-27 | ヤマハ発動機株式会社 | 4サイクルエンジンのブリーザ装置 |
JPH04365915A (ja) * | 1991-06-13 | 1992-12-17 | Honda Motor Co Ltd | 内燃機関のクランク室ブリーザ装置 |
JP3102111B2 (ja) * | 1991-12-19 | 2000-10-23 | スズキ株式会社 | 自動二輪車用エンジンのブリーザ装置 |
GB2302135A (en) * | 1995-06-09 | 1997-01-08 | Perkins Ltd | Cooling and oil separation for engine blow-by gases |
-
2003
- 2003-06-09 AU AU2003242111A patent/AU2003242111A1/en not_active Abandoned
- 2003-06-09 CN CNB038132141A patent/CN100339569C/zh not_active Expired - Lifetime
- 2003-06-09 WO PCT/JP2003/007300 patent/WO2003104621A1/ja active Application Filing
- 2003-06-09 JP JP2004511667A patent/JPWO2003104621A1/ja active Pending
- 2003-06-10 TW TW92115710A patent/TWI243228B/zh not_active IP Right Cessation
-
2008
- 2008-06-09 JP JP2008151097A patent/JP2008208843A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56121812A (en) * | 1980-02-29 | 1981-09-24 | Yamaha Motor Co Ltd | Breather device in engine crankcase |
JPS6413212U (ja) * | 1987-05-25 | 1989-01-24 | ||
US5078105A (en) * | 1988-10-21 | 1992-01-07 | Yamaha Hatsudoki Kabushiki Kaisha | Engine for vehicle |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006046324A (ja) * | 2004-07-08 | 2006-02-16 | Yamaha Motor Co Ltd | パワーユニット |
JP4660286B2 (ja) * | 2004-07-08 | 2011-03-30 | ヤマハ発動機株式会社 | パワーユニット |
Also Published As
Publication number | Publication date |
---|---|
TW200406533A (en) | 2004-05-01 |
CN1659365A (zh) | 2005-08-24 |
JPWO2003104621A1 (ja) | 2005-10-06 |
JP2008208843A (ja) | 2008-09-11 |
TWI243228B (en) | 2005-11-11 |
AU2003242111A1 (en) | 2003-12-22 |
CN100339569C (zh) | 2007-09-26 |
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