EP2610476A2 - Air cleaner apparatus and straddle-type vehicle equipped with the apparatus - Google Patents
Air cleaner apparatus and straddle-type vehicle equipped with the apparatus Download PDFInfo
- Publication number
- EP2610476A2 EP2610476A2 EP12189795.3A EP12189795A EP2610476A2 EP 2610476 A2 EP2610476 A2 EP 2610476A2 EP 12189795 A EP12189795 A EP 12189795A EP 2610476 A2 EP2610476 A2 EP 2610476A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter element
- air
- air cleaner
- chamber
- outlet port
- 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.)
- Granted
Links
- 238000011045 prefiltration Methods 0.000 claims abstract description 168
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 description 39
- 238000004140 cleaning Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000011499 joint compound Substances 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
- F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/0212—Multiple cleaners
- F02M35/0216—Multiple cleaners arranged in series, e.g. pre- and main filter in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
- F02M35/02475—Air cleaners using filters, e.g. moistened characterised by the shape of the filter element
- F02M35/02491—Flat filter elements, e.g. rectangular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/026—Air cleaners acting by guiding the air over or through an oil or other liquid bath, e.g. combined with filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
- F02M35/048—Arranging or mounting on or with respect to engines or vehicle bodies
Definitions
- the present invention relates to an air cleaner apparatus mounted on a straddle-type vehicle.
- the invention also relates to a straddle-type vehicle equipped with the apparatus.
- the present application claims priority from Japanese Patent Application No. 2011-289098, filed on December 28, 2012 , which is incorporated by reference herein in its entirety.
- an air cleaner which is an apparatus for cleaning air, is generally provided on the upstream side of the intake pipe for supplying air to the engine.
- the element i.e., filter
- the size of the element is made larger.
- the size of the air cleaner accordingly becomes larger, consequently causing the straddle-type vehicle such as a motorcycle to have larger dimensions.
- a dual element that is, an element comprising two elements that are overlapped with each other
- An air filter (air cleaner) of Patent Literature 1 has a filter case having an outer tube and an inner tube.
- a wet-type prefilter is provided inside the inner tube.
- a filter element is provided between the inner tube and the outer tube. Accordingly, the air supplied into the filter case passes through the prefilter and the filter element in that order. Large dust is captured by the prefilter, and small dust is captured by the filter element.
- the air cleaner provided with such a dual element is believed to be less likely to cause clogging than the air cleaner with a single element.
- Patent Literature 1 JP H8(1996)-144876 A
- Patent Literature 1 has the following problem.
- the supplied air needs to pass through the dual element. For this reason, the air resistance is greater than the case that the air passes through a single element.
- Another problem is as follows. In the dual element, the locations at which clogging occurs are distributed between the prefilter and the filter element, but large dust is captured in the prefilter, through which the supplied air passes first. For this reason, the prefilter tends to cause clogging more easily than the filter element. When clogging occurs in the prefilter, the air resistance in the prefilter becomes high, so even if the clogging in the filter element is insignificant, the air resistance of the air cleaner as a whole becomes high. As a consequence, the engine performance deteriorates.
- the present invention has been accomplished in view of the foregoing and other problems, and an object thereof is to provide an air cleaner apparatus for a straddle-type vehicle that has excellent air cleaning performance for the air supplied to the engine and that inhibits the air resistance from increasing.
- the present invention provides an air cleaner apparatus comprising: an air cleaner case for mounting to a straddle-type vehicle; a main filter element accommodated in the air cleaner case and dividing an interior of the air cleaner case into a first chamber and a second chamber; an intake passage for sucking air outside the air cleaner case into the first chamber; a discharge passage for discharging the air within the second chamber out of the air cleaner case; and a pre-filter element disposed in the first chamber and comprising a wet-type element.
- the intake passage has an air outlet port for blowing off the air into the first chamber, and the pre-filter element is disposed spaced apart from the air outlet port so as to be positioned on an axis line of the air outlet port.
- the air sucked from the outside of the air cleaner case passes through the intake passage and flows from the air outlet port into the first chamber.
- the pre-filter element is disposed spaced apart from the air outlet port so as to be positioned on the axis line of the air outlet port, at least part of the air sucked into the first chamber hits the pre-filter element.
- large dust contained in the air strikes the pre-filter element and thereafter falls off. This inhibits the pre-filter element from being clogged by the large dust. Therefore, the pre-filter element is unlikely to be clogged.
- relatively small dust may be captured by the pre-filter element when it strikes the pre-filter element.
- the air resistance can be inhibited from increasing even if some clogging occurs in the pre-filter element, because the air sucked from outside can pass through the main filter element without passing through the pre-filter element.
- the air hits the pre-filter element and thereafter passes through the main filter element disposed between the first chamber and the second chamber. As a result, small dust or the like that has not been captured by the pre-filter element can be captured by the main filter element.
- the air cleaner apparatus according to the present invention has excellent air cleaning performance for the air supplied to the engine and is capable of inhibiting the air resistance from increasing, the air cleaner apparatus can effectively prevent the engine performance from degrading.
- the air cleaner case has an opposing wall facing the air outlet port and not allowing air to pass therethrough.
- the pre-filter element is provided on the opposing wall.
- the opposing wall faces the main filter element in the first chamber.
- the main filter element and the pre-filter element are disposed at such positions that they oppose each other in the first chamber in this way, so most of the air sucked from outside is allowed to hit the pre-filter element first. As a result, the air can be cleaned in good condition.
- the pre-filter element is detachably mounted to the opposing wall.
- the pre-filter element is mounted directly to the opposing wall.
- the air cleaner case has a hook member protruding from the opposing wall.
- the pre-filter element is hooked on the hook member.
- the pre-filter element can be attached to and detached from the opposing wall easily. In other words, maintenance of the pre-filter element can be carried out easily.
- the pre-filter element is provided on a portion of the opposing wall.
- the pre-filter element By disposing the pre-filter element on a portion of the opposing wall that the air sucked from outside can hit easily (typically a portion thereof near the air outlet port) in this way, cleaning of air can be carried out with a pre-filter element having a smaller size.
- the opposing wall extends in a vertical direction.
- the air outlet port is disposed between the main filter element and the pre-filter element.
- the main filter element and the pre-filter element are disposed at opposing positions across the air outlet port, so most of the air sucked from outside is allowed to hit the pre-filter element first. As a result, the air can be cleaned in good condition.
- the pre-filter element has a surface area greater than the maximum flow passage cross-sectional area of the intake passage.
- the pre-filter element Since the pre-filter element has a greater surface area in this way, the air blown off from the air outlet port is allowed to hit the pre-filter element sufficiently. As a result, the air sucked from outside can be cleaned in good condition by the pre-filter element.
- the main filter element has a surface area greater than the surface area of the pre-filter element.
- the air sucked from outside can be preliminarily cleaned in the pre-filter element by causing large dust to fall off at the pre-filter element and at the same time small dust to be captured in the pre-filter element, and thereafter, the air is cleaned sufficiently in the main filter element.
- the main filter element comprises a dry-type element.
- the air outlet port opens in a direction that does not intersect the main filter element.
- the air outlet port opens in a direction that intersects the pre-filter element.
- a straddle-type vehicle according to the present invention may comprise the above-described air cleaner apparatus.
- the present invention makes it possible to obtain a straddle-type vehicle that exhibits the above-described advantageous effects.
- the present invention can provide an air cleaner apparatus for a straddle-type vehicle that has excellent air cleaning performance for the air supplied to the engine and that inhibits the air resistance from increasing.
- the straddle-type vehicle according to the present embodiment is a scooter type motorcycle 1.
- the type of the straddle-type vehicle according to the present invention is, however, not limited to the scooter type motorcycle 1.
- the straddle-type vehicle according to the present invention may be any other type of motorcycle, such as a moped type motorcycle, an off-road type motorcycle, or an on-road type motorcycle.
- the straddle-type vehicle according to the present invention is not limited to a motorcycle but may be any other straddle-type vehicle, such as ATV (All Terrain Vehicle).
- ATV All Terrain Vehicle
- the straddle-type vehicle means a vehicle such that the rider straddles the vehicle when riding.
- front and rear
- left respectively refer to front, rear, left, and right as defined based on the perspective of the rider of the motorcycle 1.
- Reference characters F, Re, L, and R in the drawings indicate front, rear, left, and right, respectively.
- the motorcycle 1 has a vehicle body 5, a front wheel 7, a rear wheel 9, and an engine unit 40 for driving the rear wheel 9.
- the vehicle body 5 has a handlebar 11, which is operated by the rider, and a seat 13, on which the rider is to be seated.
- the engine unit 40 is what is called a unit swing type engine unit that has an engine 42 (see Fig. 8 ).
- the front end portion of the engine unit 40 is supported by a body frame 20 so that the engine unit can swing about a pivot shaft 38, which is a horizontal axis. That is, the engine unit 40 is supported so as to be swingable relative to the body frame 20.
- the body frame 20 has a main frame 24 extending rearward and obliquely downward from a head pipe 22, left and right seat frames 26 (see Fig. 2 ) and 28 extending rearward and obliquely upward from the main frame 24, and a cross-member 30 (see Fig. 2 ) provided between the left and right seat frames 26 and 28.
- a front fork 32 is mounted to the head pipe 22.
- a front wheel 7 is supported at a lower end portion of the front fork 32.
- a rear wheel 9 is supported at a rear end portion of the engine unit 40.
- a rear fender 80 for covering a portion of the rear wheel 9 is supported on the engine unit 40.
- the air cleaner 80 can swing relative to the body frame 20, together with the rear wheel 9.
- the motorcycle 1 has a storage box 180 between the left and right seat frames 26 and 28, which is supported by the cross-member 30.
- the storage box 180 has dimensions such as to accommodate a helmet or the like.
- An opening is formed in an upper portion of the storage box 180.
- the seat 13 (see Fig. 1 ) is configured to be pivotable about the front end portion of the seat 13. When the seat 13 is pivoted so that the rear end portion of the seat 13 moves frontward and obliquely upward, the just-mentioned opening is exposed outside.
- the storage box 180 has a left side wall 192 positioned to the right of the left seat frame 26.
- the storage box 180 has a right side wall 182 positioned to the left of the right seat frame 28, as illustrated in Fig. 6 .
- the motorcycle 1 has a passenger footrest 35 supported on a rear portion of the left seat frame 26 (for example, near the upper portion of the rear wheel 9 when viewed from side). Of the right seat frame 28 and the left seat frame 26, only the left seat frame 26 is provided with the passenger footrest 35..
- the footrest 35 has a relatively large footrest face 36 (see also Fig. 4 ). The passenger seated on the seat 13 can put both of his/her feet on the footrest 35.
- the footrest 35 is supported on a rear portion of only one of the left seat frame 26 and the right seat frame 28.
- the footrest 35 may be supported on a rear portion of the right seat frame 28.
- the footrest 35 be provided on one of the left and right seat frames that is opposite the one on which the muffler 15 is provided.
- the engine unit 40 is supported by the body frame 20 below the storage box 180. As illustrated in Fig. 8 , the engine unit 40 has an engine 42, which is one example of an internal combustion engine, and a V-belt type continuously variable transmission (hereinafter referred to as "CVT") 62.
- the engine 42 has a crankcase 44, a cylinder block 48 extending frontward and obliquely upward from the crankcase 44, a cylinder head 50 connected to a front portion of the cylinder block 48, and a cylinder head cover 52 connected to a front portion of the cylinder head 50.
- the entirety of the cylinder block 48, the cylinder head 50, and the cylinder head cover 52 is collectively called a cylinder 46.
- the cylinder 46 extends frontward and obliquely upward from the crankcase 44.
- a transmission case 60 is disposed to the left of the crankcase 44.
- the CVT 62 is disposed in the transmission case 60.
- a recessed portion 53, and an intake port and an exhaust port (not shown) that are connected to the recessed portion 53 are formed in the cylinder head 50.
- An intake pipe 54 (see Fig. 6 ) is connected to the intake port, and an exhaust pipe 56 (see Fig. 6 ) is connected to the exhaust port.
- the intake pipe 54 herein is not limited to a single component but may include one comprising a plurality of components combined together.
- the intake pipe 54 may be formed by a combination of a pipe connected to the intake port, a throttle body connected to the pipe, a duct connected to the throttle body, and so forth.
- the top face of a piston 59, the inner circumferential wall of the cylinder block 48, and the recessed portion 53 together form a combustion chamber 57.
- the piston 59 is connected to a crankshaft 45 via a connecting rod 58.
- the crank shaft 45 extends leftward and rightward.
- the crank shaft 45 is accommodated in the crankcase 44.
- the CVT 62 has a first pulley 64, which is a driving pulley, a second pulley 66, which is a driven pulley, and a V-belt 68 wrapped around the first pulley 64 and the second pulley 66.
- a left end portion of the crankshaft 45 protrudes to the left from the crankcase 44.
- the first pulley 64 is fitted to the left end portion of the crankshaft 45.
- the second pulley 66 is fitted to a main shaft 70.
- the main shaft 70 is connected to a rear wheel shaft 72 via a gear mechanism, which is not shown in the drawings.
- Fig. 8 depicts the state in which the transmission ratio for a front portion of the first pulley 64 and that for a rear portion of the first pulley 64 are different from each other.
- the second pulley 66 has the same configuration.
- the intake pipe 54 is connected to the intake port of the cylinder head 50.
- the intake pipe 54 extends rearward from the cylinder head 50. As illustrated in Fig. 6 , the intake pipe 54 is disposed above the cylinder 46 and below the storage box 180.
- An air cleaner 100 is connected to a rear portion of the intake pipe 54.
- the exhaust pipe 56 is connected to the exhaust port of the cylinder head 50.
- the exhaust pipe 56 extends rearward from the cylinder head 50.
- the muffler 15 extending rearward and obliquely upward is connected to a rear end portion of the exhaust pipe 56.
- an air cleaner apparatus 102 has the air cleaner 100, a later-described discharge passage 148, and an air inlet unit 120.
- the air cleaner 100 has an air cleaner case 105.
- the air cleaner case 105 is provided with the air inlet unit 120.
- the air inlet unit 120 has an air inlet port 122 for sucking air and an intake passage 130 extending upward from the air cleaner case 105.
- the intake passage 130 is disposed to the right of the vehicle center line L1.
- the air inlet port 122 of the intake passage 130 is disposed to the right of the right side wall 182 of the storage box 180 and to the left of the right seat frame 28.
- the intake passage 130 is formed so as to extend frontward, or frontward and obliquely upward.
- the intake passage 130 may extend vertically upward, or frontward and obliquely downward.
- vehicle center line means the line that, as viewed in plan, passes through the lateral (widthwise) center of the front wheel 7 and the lateral (widthwise) center of the rear wheel 9 and extends in a longitudinal direction (a front-rear direction).
- a cover 15A having a plurality of slits 17 formed therein is fitted to the muffler 15.
- the slits 17 are formed in a front portion of the cover 15A.
- Each of the slits 17 extends frontward and obliquely downward.
- the slits 17 are aligned one above the other and arranged parallel to each other.
- the center line L2 of the muffler 15 is positioned to the right of the center line L3 of the intake passage 130, when viewed from the rear the motorcycle (vehicle) 1.
- the leftmost end 16 of the muffler 15 is positioned to the right of the center line L3 of the intake passage 130 when viewed from the rear of the vehicle. More preferably, the leftmost end 16 of the muffler 15 is positioned to the right of the rightmost end of the intake passage 130 when viewed from the rear of the vehicle.
- Such a configuration makes it possible to effectively inhibit the heat of the muffler 15 from being transmitted to the intake passage 130, which is connected to the air cleaner 100 and the air cleaner 100.
- the term “the center line of the muffler 15" refers to the line that, as viewed in plan, passes through the lateral (widthwise) center of the muffler 15 and extends in a longitudinal direction (a front-rear direction).
- the term “the center line of the intake passage 130” refers to the line that, as viewed in plan, passes through the lateral (widthwise) center of the intake passage 130 and extends in a longitudinal direction (a front/rear direction).
- the vertical lines passing the center lines L1, L2, and L3 are indicated by dash-dotted lines, which are denoted by respective reference characters L1, L2, and L3, in place of the center lines L1, L2, and L3.
- the motorcycle 1 has a rear cushion unit 95 provided between a rear portion of the body frame 20 (typically a rear portion of the left seat frame 26) and a rear portion of the engine unit 40.
- the rear cushion unit 95 is supported by the left seat frame 26 and the transmission case 60.
- the air cleaner 100 is connected to the intake pipe 54 for introducing air to the engine unit 42.
- a connecting portion 43 of the intake pipe 54 for connecting the intake pipe 54 to the engine 42 and a connecting portion 55 of the intake pipe 54 for connecting the intake pipe 54 to the air cleaner 100 are disposed on the vehicle center line L1, as viewed in plan.
- the intake pipe 54 has no or, if any, a little bend in a right/left direction. Therefore, the air-intake characteristics of the engine 42 are good, and the engine performance improves.
- the intake pipe 54 is allowed to extend straight as viewed in plan, so the air-intake resistance can be reduced and the engine performance can be improved.
- the rear fender 80 has an upper portion 82 positioned above the rear wheel 9 and side portions 84A and 84B positioned to the sides of the rear wheel 9.
- the air cleaner 100 forms at least a portion of the upper portion 82 of the rear fender 80. As illustrated in Figs. 6 and 11 , the air cleaner 100 (first case 110) and the rear wheel 9 are disposed so as to overlap each other as viewed from side.
- the front-to-rear length of the right side portion of the air cleaner 100 is set longer than the front-to-rear length of the left side portion thereof.
- the air inlet unit 120 is provided for one of the left and right side portions of the air cleaner 100 with respect to the vehicle center line L1 that has a longer front-to-rear length than the other. In the present embodiment, the air inlet unit 120 is provided on the right side portion (the later-described first case 110) of the air cleaner 100.
- the air cleaner 100 has the air cleaner case 105 including a first case 110 and a second case 140 each having an opening formed therein, and a main filter element 170 for cleaning air.
- the first case 110 and the second case 140 are assembled to each other so that their openings face each other with the main filter element 170 interposed therebetween.
- the main filter element 170 is accommodated in the air cleaner case 105 so that it divides the interior of the air cleaner case 105 into a first chamber 115 (i.e., the internal space of the first case 110) and a second chamber 145 (i.e., the internal space of the second case 140).
- the main filter element 170 may be either a dry-type element (an element not impregnated with oil) or a wet-type element (an element impregnated with oil).
- the phrase "the main filter element 170 divides the interior of the air cleaner case 105 into the first chamber 115 and the second chamber 145" means to include not only a case in which the main filter element 170 forms the entire dividing wall but also a case in which the main filter element 170 forms a portion of the dividing wall.
- the main filter element 170 is fitted to a frame 174.
- the main filter element 170 can be easily fitted into the case 105 together with the frame 174 by respectively fitting engaging portions 176, 176 formed on both end portions of the frame 174 into engaging grooves 106, 106 provided in the air cleaner case 105.
- the main filter element 170 can be easily removed, so the maintenance can be carried out easily.
- the above-described air inlet unit 120 is connected to the first case 110. More specifically, the first case 110 of the air cleaner 100 is provided with the air inlet unit 120 for sucking the air outside the air cleaner case 105 into the first chamber 115. As described previously, the air inlet unit 120 has the air inlet port 122 for sucking air and the intake passage 130 extending upward from the air cleaner case 105 (more specifically from the first case 110). As illustrated in Fig. 13 , the intake passage 130 has an air outlet port 132 for blowing off air into the first chamber 115. As illustrated in Fig. 12 , the air outlet port 132 opens in a direction that intersects a pre-filter element 138. The air outlet port 132 opens in a direction that does not intersect the main filter element 170.
- the pre-filter element 138 comprising a wet-type element (that is, an element impregnated with oil) is disposed in the first chamber 115.
- the pre-filter element 138 is disposed spaced apart from the air outlet port 132 so as to be positioned on the axis line of the air outlet port 132.
- the pre-filter element 138 is disposed so that the blown-off air can hit the pre-filter element 138 but does not pass through the pre-filter element 138.
- the phrase "air passes through the pre-filter element 138" means that the air passes through the pre-filter element 138 without substantially changing its flow direction. Therefore, such an air flow that hits the pre-filter element 138 in the front and leaks from the side faces of the pre-filter element 138, not flowing out from the back face of the pre-filter element 138, does not fit the definition of the phrase "air passes through the pre-filter element" herein.
- the air outlet port 132 be disposed so that the air outlet port 132 faces a central portion of the pre-filter element 138. In other words, it is preferable that the air outlet port 132 be disposed so that the central region of the pre-filter element 138 is positioned on an extension line of the air outlet port 132. In the present embodiment, the air outlet port 132 is disposed between the main filter element 170 and the pre-filter element 138, as illustrated in Fig. 12 . It is preferable that the air outlet port 132 be disposed so that the pre-filter element 138 is positioned on an extension line of at least a portion of the air outlet port 132.
- the air outlet port 132 be disposed so that the pre-filter element 138 is positioned on the extension line of the air outlet port 132.
- the distance between the air outlet port 132 and the pre-filter element 138 be shorter than the distance between the air outlet port 132 and the main filter element 170.
- the surface area of the pre-filter element 138 be greater than the opening area of the air outlet port 132.
- the pre-filter element 138 has a surface area greater than the maximum flow passage cross-sectional area of the intake passage 130. Such a configuration allows the air blown off from the air outlet port 132 to hit the pre-filter element 138 sufficiently because the surface area of the pre-filter element 138 is greater. As a result, the air sucked from outside can be cleaned in good condition by the pre-filter element 138.
- the term "the surface area of the pre-filter element 138" means the area of the surface of the pre-filter element 138 that is exposed to the first chamber 115 and it does not include the area thereof that is in contact with an opposing wall 136.
- the surface area of the main filter element 170 be greater than the surface area of the pre-filter element 138.
- Such a configuration allows large dust to fall off at the pre-filter element 138 and at the same time relatively small dust to be captured in the pre-filter element 138, so that the air sucked from outside can be preliminarily cleaned. Thereafter, the air can be further cleaned in the main filter element 170.
- the term "the surface area of the main filter element 170" means the entire surface area of the main filter element 170 with which the air can be in contact when the air passes from the first chamber 115 to the second chamber 145.
- the first case 110 of the air cleaner 100 has an opposing wall 136 facing the air outlet port 132 and not allowing air to pass therethrough.
- the opposing wall 136 faces the main filter element 170 in the first chamber 115.
- the opposing wall 136 extends in a vertical direction.
- the pre-filter element 138 provided on the opposing wall 136 is disposed so as to extend in a vertical direction. Large dust contained in the air sucked from outside tends to fall off after it strikes the pre-filter element 138. As a result, large dust is not captured by the pre-filter element 138 in a large amount, so the pre-filter element 138 is inhibited from clogging.
- the first case 110 of the air cleaner 100 has hook members 134, 134 protruding from the opposing wall 136.
- the pre-filter element 138 is hooked on the hook members 134, 134, whereby the pre-filter element 138 is provided on the opposing wall 136.
- the hook members 134 are fitted in fitting holes 139 formed in the pre-filter element 138 so that the pre-filter element 138 can be mounted onto the opposing wall 136.
- Such a configuration makes the maintenance of the pre-filter element 138 easy.
- the pre-filter element 138 is detachably mounted to the opposing wall 136 by being hooked on the hook members 134, 134, but the method of mounting the pre-filter element 138 to the opposing wall 136 is not particularly limited.
- the pre-filter element 138 may be mounted directly to the opposing wall 136 by using, for example, an adhesive agent.
- a pre-filter element 238 is fitted into and removed from a slot 116 provided in a front end portion of the first case 110.
- the pre-filter element 238 inserted from the slot 116 into the first chamber 115 is prevented from moving in the frontward and rearward directions by a positioning wall 118 formed in the first chamber 115.
- the pre-filter element 238 is prevented from moving in the leftward and rightward directions by a positioning wall 117 formed in the first chamber 115.
- the pre-filter element 138 is provided on a portion of the opposing wall 136 (that is, near the air outlet port 132), but this configuration is merely illustrative.
- the pre-filter element 138 may be provided over the entire surface of the opposing wall 136.
- the pre-filter element 138 may be provided on a wall that makes up the first chamber 115 but does not oppose the main filter element 170 (i.e., a different wall from the opposing wall 136).
- the second case 140 of the air cleaner 100 is provided with the discharge passage 148 for discharging the air within the second chamber 145 out of the air cleaner case 105.
- the discharge passage 148 constitutes a part of the intake pipe 54 that allows the second case 140 of the air cleaner 100 to communicate with the engine 42.
- the air outside the air cleaner case 105 is sucked from the air inlet port 122.
- the sucked air passes through the intake passage 130 and flows from the air outlet port 132 toward a central portion of the pre-filter element 138.
- large dust contained in the air falls off into the first chamber 115.
- a portion of small dust contained in the air is not captured by the pre-filter element 138 and is allowed to flow, while the other portion thereof is captured by the pre-filter element 138.
- the air is cleaned by the pre-filter element 138.
- the air that has been sucked in the first chamber 115 can pass through the main filter element 170 without passing through the pre-filter element 138.
- the sucked air strikes the surface of the pre-filter element 138 and changes its flow direction. Therefore, the increase of the air resistance resulting from the clogging can be inhibited.
- the air cleaned by the pre-filter element 138 thereafter passes through the main filter element 170. At this time, the small dust that was not captured by the pre-filter element 138 is captured by the main filter element 170. As a result, the air that has been cleaned in good condition can be supplied to the engine 42.
- the air inlet port 122 of the intake passage 130 will be described in detail. As illustrated in Figs. 6 and 7 , at least a portion of the air inlet port 122 of the intake passage 130 faces the right side wall 182 of the storage box 180.
- the intake passage 130 is formed by a duct that cannot contract or expand.
- the length of the intake passage 130 is invariable, and accordingly, the length of the whole intake passage of the engine 42 (that is, the intake passage 130 of the air inlet unit 120, the passage in the air cleaner 100, and the intake pipe 54) is invariable.
- fluctuations in the intake pulse can be suppressed, and the performance of the engine 42 is stabilized.
- the right side wall 182 of the storage box 180 is positioned to the left of the right seat frame 28.
- a recessed portion 190 recessed toward the left is formed in the right side wall 182 of the storage box 180.
- the right side wall 182 of the storage box 180 has a front side wall 184, a rear wall 186 extending leftward from the rear end of the front side wall 184, and a rear side wall 188 extending rearward from the leftmost end of the rear wall 186.
- the recessed portion 190 is defined by at least the rear wall 186 and the rear side wall 188.
- the storage box 180 has the left side wall 192 positioned to the right of the left seat frame 26.
- a recessed portion 200 recessed toward the right is formed in the left side wall 192 of the storage box 180.
- the left side wall 192 of the storage box 180 has a front side wall 194, a rear wall 196 extending rightward from the rear end of the front side wall 194, and a rear side wall 198 extending rearward from the rightmost end of the rear wall 196.
- the recessed portion 200 is defined by at least the rear wall 196 and the rear side wall 198.
- At least a portion of the air inlet port 122 of the intake passage 130 is disposed within the recessed portion 190. That is, as illustrated in Fig. 2 , when viewed from the front of the motorcycle 1, at least a portion of the air inlet port 122 is hidden behind the storage box 180 and cannot be seen. The mud, dust, water, and the like that are splashed up by the front wheel 7 do not enter the recessed portion 190 easily. As a result, entry of mud, dust, water and the like into the air inlet port 122 is inhibited.
- the air inlet port 122 of the intake passage 130 faces the rear wall 186.
- the air inlet port 122 of the intake passage 130 has a first portion 124 that opens frontward and a second portion 126 that opens (i.e., has an opening) leftward.
- the air inlet port 122 is disposed so that the rightmost end 187 of the rear wall 186 is positioned more to the right than the rightmost end 125 of the first portion 124.
- the first portion 124 of the air inlet port 122 faces the rear wall 186 of the right side wall 182.
- the second portion 126 of the air inlet port 122 faces the rear side wall 188 of the right side wall 182.
- the air inlet port 122 of the present embodiment has an L-shape as viewed in plan, but is not limited to having such a shape.
- the air inlet port 122 may have a shape such as to open obliquely leftward and frontward.
- the air inlet port 122 is disposed in the space between the right of the right side wall 182 of the storage box 180 and the left of the right seat frame 28, which has been an unutilized space in the past. Thus, it is not necessary to provide extra space for the air inlet port 122, and it is possible to utilize the existing space effectively. Moreover, the water, mud, dust, and the like that are splashed up from the front wheel 7 are unlikely to enter the air inlet port 122 because at least a portion of the air inlet port 122 is disposed so as to face the right side wall 182 of the storage box 180. As a result, the amount of dust and the like sucked into the air cleaner 100 is reduced, so the performance deterioration of the engine 42 can be inhibited effectively.
- At least a portion of the air inlet port 122 is disposed so as to overlap the right seat frame 28 when viewed from the side of the vehicle. With such a configuration, entry of mud and dust into the air inlet port 122 can be inhibited by the right seat frame 28.
- the intake passage 130 connected to the air cleaner 100 is disposed in the space between the right of the right side wall 182 of the storage box 180 and the left of the right seat frame 28.
- another intake passage 210 extending upward from the transmission case 60 can be disposed to the left of the vehicle center line L1 so as not to interfere with the intake passage 130 connected to the air cleaner 100, as illustrated in Figs. 3 and 5 .
- the intake passage 210 can be disposed in the space between the left of the left side wall 192 of the storage box 180 and the right of the left seat frame 26.
- the intake passage 210 is a passage for introducing cooling air to the CVT 62 in the transmission case 60. As illustrated in Fig. 5 , the intake passage 210 has a bellows-shaped duct 214 that can freely contract and expand, and a duct 216 integrally formed with the recessed portion 200 of the left side wall 192 of the storage box.
- An air inlet port 212 that opens leftward is formed at a distal end portion of the duct 216. At least a portion of the air inlet port 212 is disposed within the recessed portion 200.
- the air inlet port 212 is an opening for sucking air. In the present embodiment, the entirety of the air inlet port 212 is disposed within the recessed portion 200.
- the air inlet port 212 opens toward the left from a rear side wall 198 of the left side wall 192. However, like the above-described air inlet port 122 of the intake passage 130, it is sufficient that at least a portion of the air inlet port 212 should face the rear wall 196.
- the mud, dust, water, and the like that are splashed up by the front wheel 7 does not easily enter the recessed portion 200. As a result, entry of mud, dust, water and the like through the air inlet port 212 into the transmission case 60 can be inhibited.
- the air cleaner 100 forms at least a portion of the upper portion 82 of the rear fender 80.
- a portion of the upper portion 82 of the rear fender 80 is formed by the second case 140.
- the first case 110 is disposed at a side of the rear fender 80. By disposing the first case 110 at a side of the rear fender 80 in this way, the second case 140 is ensured to have a large capacity.
- the portion of the rear fender 80 excluding the air cleaner 100 (hereinafter referred to as a "main fender portion 86") and the air cleaner 100 are assembled with each other.
- the main fender portion 86 and the second case 140 of the air cleaner 100 are fastened to each other by a fastener 90A in the upper portion 82 of the rear fender 80.
- the main fender portion 86 and the second case 140 of the air cleaner 100 are fastened to each other by a fastener 90B in the left side portion 84B of the rear fender 80.
- the main fender portion 86 and the first case 110 of the air cleaner 100 are fastened to each other by a fastener 90C in the right side portion 84A of the rear fender 80.
- a fastener 90C in the right side portion 84A of the rear fender 80 examples include commonly-used bolts, screws, and rivets.
- the engine unit 40 and the air cleaner 100 which is a part of the rear fender 80, are fastened to each other by a fastener 92A.
- the main fender portion 86 which is a part of the rear fender 80, and the engine unit 40 are fastened to each other by a fastener 92B.
- the air cleaner 100 and the main fender portion 86 are fixed to each other, and in addition, the air cleaner 100 and the main fender portion 86 are both fixed to the engine unit 40. Therefore, even when the rear fender 80 swings, the air cleaner 100 and the main fender portion 86 can be prevented from chattering and position shifting.
- the leftmost end 142 of the air cleaner 100 (more specifically, the leftmost end 142 of the second case 140) is positioned to the left of the vehicle center line L1.
- the rightmost end 112 of the air cleaner 100 (more specifically, the rightmost end 112 of the first case 110) is positioned to the right of the vehicle center line L1.
- the entire lateral part of a front portion 150 of the rear fender 80 is formed by the air cleaner 100.
- the front portion 150 of the rear fender 80 is the front end face of the air cleaner 100, but the front portion 150 may be a portion that is more rearward than the front end face.
- a boundary 152 between the main fender portion 86 and the air cleaner 100 is inclined with respect to the vehicle center line L1, as viewed in plan.
- the air cleaner 100 is formed so that its front-to-rear length is longer either toward the right or toward the left, as viewed in plan.
- a portion of the boundary 152 between the main fender portion 86 and the air cleaner 100 (more specifically, a region on the right of the laterally central part of the air cleaner 100) is inclined with respect to the vehicle center line L1 as viewed in plan.
- the air cleaner 100 is formed so that its front-to-rear length is longer from the left toward the right. With such a configuration, the air cleaner 100 can be ensured to have a large capacity. When the air cleaner 100 has a large capacity, a large amount of air can be sucked in at one time, so that the engine performance can be improved.
- the air cleaner 100 is formed so that, as viewed in plan, its front-to-rear length is longer from one of the left and right sides on which the footrest 35 is provided toward the other.
- the footrest 35 is provided on the left seat frame 26.
- the air cleaner 100 is formed so that its front-to-rear length is longer from the left toward the right.
- a recessed portion 88 in which a portion of the rear cushion unit 95 (see Fig. 5 ) can be accommodated is formed in a left portion of the rear fender 80.
- the middle position between the leftmost end 142 and the rightmost end 112 of the air cleaner 100 is biased rightward from the vehicle center line L1.
- the middle position of the air cleaner 100 is biased toward the opposite side to one of the left and right sides of the vehicle center line L1 in which the recessed portion 88 of the rear fender 80 is formed.
- the lower end 108 (for example, the bottom face portion of the first chamber 115) of the air cleaner 100 is positioned to be lower than the middle position between an upper end 81 A and a lower end 81B of the rear fender 80.
- the upper end 81A of the rear fender 80 refers to the vertically uppermost portion of the main fender portion 86 in the rear fender 80 mounted to the engine unit 40.
- the vertically uppermost portion of the main fender portion 86 and the vertically uppermost portion of the air cleaner 100 are located at substantially the same height from the ground.
- the lower end 81B of the rear fender 80 refers to the vertically lowermost portion of the main fender portion 86 in the rear fender 80 mounted to the engine unit 40.
- the position of the seat 13 can be made low, for example, because the air cleaner 100 is disposed at a low position.
- the lower end 108 of the air cleaner 100 may be a bottom face portion of the second chamber 145, depending on the shape of the air cleaner 100.
- the vertical length of the air cleaner 100 varies from the front toward the rear.
- the maximum vertical length of the air cleaner 100 (for example, the maximum vertical length of the first chamber 115) is shorter than the vertical length of the rear fender 80 at the upper end 81A position (in other words, the vertical length thereof in the vertical cross section through the position of the upper end 81A).
- an additional spatial margin can be ensured above the air cleaner 100 because the vertical length of the air cleaner 100 is short.
- the position of the seat 13 may be lowered, for example.
- the maximum vertical length of the air cleaner 100 may be the maximum vertical length of the second chamber 145, depending on the shape of the air cleaner 100.
- the air cleaner 100 forms at least a portion of the upper portion 82 of the rear fender 80, and therefore, it is not necessary to dispose an air cleaner separately above the rear fender 80 (for example, over the rear fender 80). Accordingly, there is a greater additional spatial margin than the case in which an air cleaner is disposed above the rear fender, so the capacity of the air cleaner 100 can be made larger. Thereby, the air cleaning performance of the air cleaner 100 can be improved.
- the air cleaner apparatus 102 has the discharge passage 148, the air inlet unit 120, and the air cleaner case 105, as illustrated in Fig. 12 .
- the air sucked in from the outside of the air cleaner case 105 passes through the intake passage 130 and flows from the air outlet port 132 into the first chamber 115.
- the pre-filter element 138 is disposed spaced apart from the air outlet port 132 so as to be positioned on the axis line of the air outlet port 132, at least part of the air sucked into the first chamber 115 hits the pre-filter element 138. As a result, large dust contained in the air strikes the pre-filter element 138 and thereafter falls off.
- the pre-filter element 138 is unlikely to be clogged.
- relatively small dust may be captured by the pre-filter element 138 when it strikes the pre-filter element 138. For this reason, if the air is kept sucked from outside, it is possible that the small dust may cause clogging to some degree in the pre-filter element 138. Nevertheless, the air resistance can be inhibited from increasing even if some clogging occurs in the pre-filter element 138, because the air sucked from outside can pass through the main filter element 170 without passing through the pre-filter element 138.
- the air hits the pre-filter element 138 and thereafter passes through the main filter element 170 disposed between the first chamber 115 and the second chamber 145.
- small dust or the like that has not been captured by the pre-filter element 138 can be captured by the main filter element.
- the air cleaner case 105 has the opposing wall 136 facing the air outlet port 132 and not allowing air to pass therethrough.
- the pre-filter element 138 is provided on the opposing wall 136.
- the opposing wall 136 faces the main filter element 170 in the first chamber 115.
- the main filter element 170 and the pre-filter element 138 are disposed at such positions that they oppose each other in the first chamber 115, so most of the air sucked from outside is allowed to hit the pre-filter element 138 first. As a result, the air can be cleaned in good condition.
- the pre-filter element 138 is detachably mounted to the opposing wall 136. This makes it possible to replace the pre-filter element 138 easily when clogging occurs in the pre-filter element 138 and the cleaning performance of the pre-filter element 138 degrades. In other words, maintenance of the pre-filter element 138 can be carried out easily.
- the pre-filter element 138 is mounted directly to the opposing wall 136. Therefore, the need for the complicated structure for mounting the pre-filter element 138 to the opposing wall 136 is eliminated, and the structure of the air cleaner apparatus 102 can be simplified.
- the air cleaner case 105 has hook members 134 protruding from the opposing wall 136.
- the pre-filter element 138 is hooked on the hook members. For this reason, the pre-filter element 138 can be attached to and detached from the opposing wall 136 easily. In other words, maintenance of the pre-filter element 138 can be carried out easily.
- the pre-filter element 138 is provided on a portion of the opposing wall 136.
- the pre-filter element 138 is provided on a portion of the opposing wall 136.
- the opposing wall 136 extends in a vertical direction. Therefore, large dust contained in the air that has been sucked from outside falls off after it strikes the pre-filter element 138 provided on the wall extending in a vertical direction. That is, large dust can be removed more effectively.
- the air outlet port 132 is disposed between the main filter element 170 and the pre-filter element 138.
- the main filter element 170 and the pre-filter element 138 are disposed at opposing positions across the air outlet port 132, so most of the air sucked from outside is allowed to hit the pre-filter element 138 first. As a result, the air can be cleaned in good condition.
- the surface area of the pre-filter element 138 is greater than the maximum flow passage cross-sectional area of the intake passage 130.
- the pre-filter element 138 has a greater surface area, and therefore, the air blown off from the air outlet port 132 is allowed to hit the pre-filter element 138 sufficiently. As a result, the air sucked from outside can be cleaned in good condition by the pre-filter element 138.
- the surface area of the main filter element 170 is greater than the surface area of the pre-filter element 138.
- the main filter element 170 comprises a dry-type element. This makes handling and maintenance of the main filter element easy.
- the air outlet port 132 opens in a direction that does not intersect the main filter element 170. This reduces the air sucked from the outside of the air cleaner case 105 that directly hits the main filter element 170.
- the air outlet port 132 opens in a direction that intersects the main filter element 138. This enables most of the air that is sucked from the outside of the air cleaner case 105 to directly hit the pre-filter element 138.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automatic Cycles, And Cycles In General (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
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Abstract
Description
- The present invention relates to an air cleaner apparatus mounted on a straddle-type vehicle. The invention also relates to a straddle-type vehicle equipped with the apparatus.
The present application claims priority from Japanese Patent Application No.2011-289098, filed on December 28, 2012 - In a straddle-type vehicle having an engine as a driving power source, dust or the like contained in the air supplied to the engine may cause abrasion of the inside of the engine, consequently leading to a shorter engine life span. For this reason, an air cleaner, which is an apparatus for cleaning air, is generally provided on the upstream side of the intake pipe for supplying air to the engine.
- When the amount of dust contained in the air is large, the element (i.e., filter) in the air cleaner case is clogged in a short time. To avoid the problem of the filter clogging, it is conceivable that the size of the element is made larger. However, as the size of the element is made larger, the size of the air cleaner accordingly becomes larger, consequently causing the straddle-type vehicle such as a motorcycle to have larger dimensions. In view of the problem, it has conventionally been known that a dual element (that is, an element comprising two elements that are overlapped with each other) is provided in the air cleaner case, in order to ensure the cleaning performance for the air supplied to the engine and to prevent a size increase of the air cleaner.
- An air filter (air cleaner) of
Patent Literature 1 has a filter case having an outer tube and an inner tube. A wet-type prefilter is provided inside the inner tube. In addition, a filter element is provided between the inner tube and the outer tube. Accordingly, the air supplied into the filter case passes through the prefilter and the filter element in that order. Large dust is captured by the prefilter, and small dust is captured by the filter element. The air cleaner provided with such a dual element is believed to be less likely to cause clogging than the air cleaner with a single element. - Patent Literature 1:
JP H8(1996)-144876 A - However, the technique disclosed in
Patent Literature 1 has the following problem. The supplied air needs to pass through the dual element. For this reason, the air resistance is greater than the case that the air passes through a single element. Another problem is as follows. In the dual element, the locations at which clogging occurs are distributed between the prefilter and the filter element, but large dust is captured in the prefilter, through which the supplied air passes first. For this reason, the prefilter tends to cause clogging more easily than the filter element. When clogging occurs in the prefilter, the air resistance in the prefilter becomes high, so even if the clogging in the filter element is insignificant, the air resistance of the air cleaner as a whole becomes high. As a consequence, the engine performance deteriorates. - The present invention has been accomplished in view of the foregoing and other problems, and an object thereof is to provide an air cleaner apparatus for a straddle-type vehicle that has excellent air cleaning performance for the air supplied to the engine and that inhibits the air resistance from increasing.
- The present invention provides an air cleaner apparatus comprising: an air cleaner case for mounting to a straddle-type vehicle; a main filter element accommodated in the air cleaner case and dividing an interior of the air cleaner case into a first chamber and a second chamber; an intake passage for sucking air outside the air cleaner case into the first chamber; a discharge passage for discharging the air within the second chamber out of the air cleaner case; and a pre-filter element disposed in the first chamber and comprising a wet-type element. The intake passage has an air outlet port for blowing off the air into the first chamber, and the pre-filter element is disposed spaced apart from the air outlet port so as to be positioned on an axis line of the air outlet port.
- In the air cleaner apparatus according to the present invention, the air sucked from the outside of the air cleaner case passes through the intake passage and flows from the air outlet port into the first chamber. Because the pre-filter element is disposed spaced apart from the air outlet port so as to be positioned on the axis line of the air outlet port, at least part of the air sucked into the first chamber hits the pre-filter element. As a result, large dust contained in the air strikes the pre-filter element and thereafter falls off. This inhibits the pre-filter element from being clogged by the large dust. Therefore, the pre-filter element is unlikely to be clogged. On the other hand, relatively small dust may be captured by the pre-filter element when it strikes the pre-filter element. For this reason, if the air is kept sucked from the outside of the air cleaner case, it is possible that the small dust may cause clogging to some degree in the pre-filter element. Nevertheless, the air resistance can be inhibited from increasing even if some clogging occurs in the pre-filter element, because the air sucked from outside can pass through the main filter element without passing through the pre-filter element. The air hits the pre-filter element and thereafter passes through the main filter element disposed between the first chamber and the second chamber. As a result, small dust or the like that has not been captured by the pre-filter element can be captured by the main filter element.
- Thus, since the air cleaner apparatus according to the present invention has excellent air cleaning performance for the air supplied to the engine and is capable of inhibiting the air resistance from increasing, the air cleaner apparatus can effectively prevent the engine performance from degrading.
- In one embodiment of the present invention, the air cleaner case has an opposing wall facing the air outlet port and not allowing air to pass therethrough. The pre-filter element is provided on the opposing wall.
- Thus, the above-described advantageous effects can be obtained with the simple structure of providing the pre-filter element on the opposing wall.
- In one embodiment of the present invention, the opposing wall faces the main filter element in the first chamber.
- The main filter element and the pre-filter element are disposed at such positions that they oppose each other in the first chamber in this way, so most of the air sucked from outside is allowed to hit the pre-filter element first. As a result, the air can be cleaned in good condition.
- In one embodiment of the present invention, the pre-filter element is detachably mounted to the opposing wall.
- This makes it possible to replace the pre-filter element easily when clogging occurs in the pre-filter element and the cleaning performance of the pre-filter element degrades. In other words, maintenance of the pre-filter element can be carried out easily.
- In one embodiment of the present invention, the pre-filter element is mounted directly to the opposing wall.
- This eliminates the need for the complicated structure for mounting the pre-filter element to the opposing wall, and can simplify the structure of the air cleaner apparatus.
- In one embodiment of the present invention, the air cleaner case has a hook member protruding from the opposing wall. The pre-filter element is hooked on the hook member.
- As a result, the pre-filter element can be attached to and detached from the opposing wall easily. In other words, maintenance of the pre-filter element can be carried out easily.
- In one embodiment of the present invention, the pre-filter element is provided on a portion of the opposing wall.
- By disposing the pre-filter element on a portion of the opposing wall that the air sucked from outside can hit easily (typically a portion thereof near the air outlet port) in this way, cleaning of air can be carried out with a pre-filter element having a smaller size.
- In one embodiment of the present invention, the opposing wall extends in a vertical direction.
- Thus, large dust contained in the air that has been sucked from outside falls off after it strikes the pre-filter element provided on the wall extending in a vertical direction. That is, large dust can be removed more effectively.
- In one embodiment of the present invention, the air outlet port is disposed between the main filter element and the pre-filter element.
- Thus, the main filter element and the pre-filter element are disposed at opposing positions across the air outlet port, so most of the air sucked from outside is allowed to hit the pre-filter element first. As a result, the air can be cleaned in good condition.
- In one embodiment of the present invention, the pre-filter element has a surface area greater than the maximum flow passage cross-sectional area of the intake passage.
- Since the pre-filter element has a greater surface area in this way, the air blown off from the air outlet port is allowed to hit the pre-filter element sufficiently. As a result, the air sucked from outside can be cleaned in good condition by the pre-filter element.
- In one embodiment of the present invention, the main filter element has a surface area greater than the surface area of the pre-filter element.
- Thereby, the air sucked from outside can be preliminarily cleaned in the pre-filter element by causing large dust to fall off at the pre-filter element and at the same time small dust to be captured in the pre-filter element, and thereafter, the air is cleaned sufficiently in the main filter element.
- In one embodiment of the present invention, the main filter element comprises a dry-type element.
- This makes handling and maintenance of the main filter element easy.
- In one embodiment of the present invention, the air outlet port opens in a direction that does not intersect the main filter element.
- This reduces the air sucked from outside that directly hits the main filter element.
- In one embodiment of the present invention, the air outlet port opens in a direction that intersects the pre-filter element.
- This enables most of the air that is sucked from outside to directly hit the pre-filter element.
- A straddle-type vehicle according to the present invention may comprise the above-described air cleaner apparatus.
- The present invention makes it possible to obtain a straddle-type vehicle that exhibits the above-described advantageous effects.
- As described above, the present invention can provide an air cleaner apparatus for a straddle-type vehicle that has excellent air cleaning performance for the air supplied to the engine and that inhibits the air resistance from increasing.
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Fig. 1 is a right side view illustrating a motorcycle according to one embodiment of the present invention; -
Fig. 2 is a front view illustrating a rear portion of the motorcycle according to one embodiment of the present invention; -
Fig. 3 is a rear view illustrating the rear portion of the motorcycle according to one embodiment of the present invention; -
Fig. 4 is a plan view illustrating the rear portion of the motorcycle according to one embodiment of the present invention; -
Fig. 5 is a left side view illustrating the rear portion of the motorcycle according to one embodiment of the present invention; -
Fig. 6 is a right side view illustrating the rear portion of the motorcycle according to one embodiment of the present invention; -
Fig. 7 is a perspective view illustrating an air cleaner and a storage box according to one embodiment of the present invention; -
Fig. 8 is an internal cross-sectional view illustrating an engine unit according to one embodiment of the present invention; -
Fig. 9 is a plan view illustrating an air cleaner and a rear fender according to one embodiment of the present invention; -
Fig. 10 is a left side view illustrating the air cleaner and the rear fender according to one embodiment of the present invention; -
Fig. 11 is a right side view illustrating the air cleaner and the rear fender according to one embodiment of the present invention; -
Fig. 12 is a horizontal cross-sectional view illustrating the air cleaner according to one embodiment of the present invention; -
Fig. 13 is a cross-sectional view taken along line XIII-XIII inFig. 12 ; and -
Fig. 14 is a horizontal cross-sectional view illustrating an air cleaner according to another embodiment of the present invention. - Hereinbelow, embodiments of the present invention will be described. As illustrated in
Fig. 1 , the straddle-type vehicle according to the present embodiment is ascooter type motorcycle 1. The type of the straddle-type vehicle according to the present invention is, however, not limited to thescooter type motorcycle 1. The straddle-type vehicle according to the present invention may be any other type of motorcycle, such as a moped type motorcycle, an off-road type motorcycle, or an on-road type motorcycle. The straddle-type vehicle according to the present invention is not limited to a motorcycle but may be any other straddle-type vehicle, such as ATV (All Terrain Vehicle). Note that the straddle-type vehicle means a vehicle such that the rider straddles the vehicle when riding. - In the following description, the terms "front," "rear," "left," and "right" respectively refer to front, rear, left, and right as defined based on the perspective of the rider of the
motorcycle 1. Reference characters F, Re, L, and R in the drawings indicate front, rear, left, and right, respectively. - The
motorcycle 1 has avehicle body 5, afront wheel 7, arear wheel 9, and anengine unit 40 for driving therear wheel 9. Thevehicle body 5 has ahandlebar 11, which is operated by the rider, and aseat 13, on which the rider is to be seated. Theengine unit 40 is what is called a unit swing type engine unit that has an engine 42 (seeFig. 8 ). The front end portion of theengine unit 40 is supported by abody frame 20 so that the engine unit can swing about apivot shaft 38, which is a horizontal axis. That is, theengine unit 40 is supported so as to be swingable relative to thebody frame 20. - The
body frame 20 has amain frame 24 extending rearward and obliquely downward from ahead pipe 22, left and right seat frames 26 (seeFig. 2 ) and 28 extending rearward and obliquely upward from themain frame 24, and a cross-member 30 (seeFig. 2 ) provided between the left and right seat frames 26 and 28. Afront fork 32 is mounted to thehead pipe 22. - A
front wheel 7 is supported at a lower end portion of thefront fork 32. Arear wheel 9 is supported at a rear end portion of theengine unit 40. Arear fender 80 for covering a portion of therear wheel 9 is supported on theengine unit 40. Theair cleaner 80 can swing relative to thebody frame 20, together with therear wheel 9. - As illustrated in
Fig. 4 , themotorcycle 1 has astorage box 180 between the left and right seat frames 26 and 28, which is supported by the cross-member 30. Thestorage box 180 has dimensions such as to accommodate a helmet or the like. An opening is formed in an upper portion of thestorage box 180. The seat 13 (seeFig. 1 ) is configured to be pivotable about the front end portion of theseat 13. When theseat 13 is pivoted so that the rear end portion of theseat 13 moves frontward and obliquely upward, the just-mentioned opening is exposed outside. As illustrated inFig. 5 , thestorage box 180 has aleft side wall 192 positioned to the right of theleft seat frame 26. Also, thestorage box 180 has aright side wall 182 positioned to the left of theright seat frame 28, as illustrated inFig. 6 . - As illustrated in
Figs. 4 and5 , themotorcycle 1 has apassenger footrest 35 supported on a rear portion of the left seat frame 26 (for example, near the upper portion of therear wheel 9 when viewed from side). Of theright seat frame 28 and theleft seat frame 26, only theleft seat frame 26 is provided with thepassenger footrest 35.. Thefootrest 35 has a relatively large footrest face 36 (see alsoFig. 4 ). The passenger seated on theseat 13 can put both of his/her feet on thefootrest 35. - It is sufficient that the
footrest 35 is supported on a rear portion of only one of theleft seat frame 26 and theright seat frame 28. Thefootrest 35 may be supported on a rear portion of theright seat frame 28. However, it is more preferable that thefootrest 35 be supported on a rear portion of theleft seat frame 26 because, in that way, the passenger can avoid the heat emitted from amuffler 15. Thus, it is preferable that thefootrest 35 be provided on one of the left and right seat frames that is opposite the one on which themuffler 15 is provided. - The
engine unit 40 is supported by thebody frame 20 below thestorage box 180. As illustrated inFig. 8 , theengine unit 40 has anengine 42, which is one example of an internal combustion engine, and a V-belt type continuously variable transmission (hereinafter referred to as "CVT") 62. Theengine 42 has acrankcase 44, acylinder block 48 extending frontward and obliquely upward from thecrankcase 44, acylinder head 50 connected to a front portion of thecylinder block 48, and acylinder head cover 52 connected to a front portion of thecylinder head 50. In the present specification, the entirety of thecylinder block 48, thecylinder head 50, and thecylinder head cover 52 is collectively called acylinder 46. Thecylinder 46 extends frontward and obliquely upward from thecrankcase 44. Atransmission case 60 is disposed to the left of thecrankcase 44. TheCVT 62 is disposed in thetransmission case 60. - A recessed
portion 53, and an intake port and an exhaust port (not shown) that are connected to the recessedportion 53 are formed in thecylinder head 50. An intake pipe 54 (seeFig. 6 ) is connected to the intake port, and an exhaust pipe 56 (seeFig. 6 ) is connected to the exhaust port. Note that theintake pipe 54 herein is not limited to a single component but may include one comprising a plurality of components combined together. For example, theintake pipe 54 may be formed by a combination of a pipe connected to the intake port, a throttle body connected to the pipe, a duct connected to the throttle body, and so forth. The top face of apiston 59, the inner circumferential wall of thecylinder block 48, and the recessedportion 53 together form acombustion chamber 57. Thepiston 59 is connected to acrankshaft 45 via a connectingrod 58. Thecrank shaft 45 extends leftward and rightward. Thecrank shaft 45 is accommodated in thecrankcase 44. - The
CVT 62 has afirst pulley 64, which is a driving pulley, asecond pulley 66, which is a driven pulley, and a V-belt 68 wrapped around thefirst pulley 64 and thesecond pulley 66. A left end portion of thecrankshaft 45 protrudes to the left from thecrankcase 44. Thefirst pulley 64 is fitted to the left end portion of thecrankshaft 45. Thesecond pulley 66 is fitted to amain shaft 70. Themain shaft 70 is connected to arear wheel shaft 72 via a gear mechanism, which is not shown in the drawings. Note thatFig. 8 depicts the state in which the transmission ratio for a front portion of thefirst pulley 64 and that for a rear portion of thefirst pulley 64 are different from each other. Thesecond pulley 66 has the same configuration. - The
intake pipe 54 is connected to the intake port of thecylinder head 50. Theintake pipe 54 extends rearward from thecylinder head 50. As illustrated inFig. 6 , theintake pipe 54 is disposed above thecylinder 46 and below thestorage box 180. Anair cleaner 100 is connected to a rear portion of theintake pipe 54. - The
exhaust pipe 56 is connected to the exhaust port of thecylinder head 50. Theexhaust pipe 56 extends rearward from thecylinder head 50. Themuffler 15 extending rearward and obliquely upward is connected to a rear end portion of theexhaust pipe 56. - As illustrated in
Fig. 12 , an aircleaner apparatus 102 according to the present embodiment has theair cleaner 100, a later-describeddischarge passage 148, and anair inlet unit 120. Theair cleaner 100 has an aircleaner case 105. Theair cleaner case 105 is provided with theair inlet unit 120. Theair inlet unit 120 has anair inlet port 122 for sucking air and anintake passage 130 extending upward from theair cleaner case 105. As illustrated inFig. 3 , theintake passage 130 is disposed to the right of the vehicle center line L1. Theair inlet port 122 of theintake passage 130 is disposed to the right of theright side wall 182 of thestorage box 180 and to the left of theright seat frame 28. At least a portion of theair inlet port 122 of theintake passage 130 opens toward theright side wall 182 of thestorage box 180. In the present embodiment, theintake passage 130 is formed so as to extend frontward, or frontward and obliquely upward. However, theintake passage 130 may extend vertically upward, or frontward and obliquely downward. - It should be noted that in the present specification, the term "vehicle center line" means the line that, as viewed in plan, passes through the lateral (widthwise) center of the
front wheel 7 and the lateral (widthwise) center of therear wheel 9 and extends in a longitudinal direction (a front-rear direction). - As illustrated in
Fig. 6 , acover 15A having a plurality ofslits 17 formed therein is fitted to themuffler 15. Theslits 17 are formed in a front portion of thecover 15A. Each of theslits 17 extends frontward and obliquely downward. Theslits 17 are aligned one above the other and arranged parallel to each other. When themotorcycle 1 is running, there is a risk the water on the ground may be splashed up by thefront wheel 7, hits thecover 15A, and thereafter scatters upward. However, by providing theslits 17, it is possible to change the direction in which the water splashed up by thefront wheel 7 runs. This effectively inhibits the water splashed up by thefront wheel 7 from hitting thecover 15A and entering theair inlet port 122 of theair cleaner apparatus 102. In addition, after having been momentarily captured by theslits 17, the splashed water becomes easy to flow rearward along the surface of thecover 15A. For this reason, thecover 15A can be cooled by this water. Thus, themuffler 15 that has become hot can be cooled indirectly, and also, themuffler 15 can be cooled effectively. - In the present embodiment, as illustrated in
Fig. 3 , the center line L2 of themuffler 15 is positioned to the right of the center line L3 of theintake passage 130, when viewed from the rear the motorcycle (vehicle) 1. Preferably, theleftmost end 16 of themuffler 15 is positioned to the right of the center line L3 of theintake passage 130 when viewed from the rear of the vehicle. More preferably, theleftmost end 16 of themuffler 15 is positioned to the right of the rightmost end of theintake passage 130 when viewed from the rear of the vehicle. Such a configuration makes it possible to effectively inhibit the heat of themuffler 15 from being transmitted to theintake passage 130, which is connected to theair cleaner 100 and theair cleaner 100. - In the present specification, the term "the center line of the
muffler 15" refers to the line that, as viewed in plan, passes through the lateral (widthwise) center of themuffler 15 and extends in a longitudinal direction (a front-rear direction). Likewise, In the present specification, the term "the center line of theintake passage 130" refers to the line that, as viewed in plan, passes through the lateral (widthwise) center of theintake passage 130 and extends in a longitudinal direction (a front/rear direction). InFig. 3 , for convenience in illustration, the vertical lines passing the center lines L1, L2, and L3 are indicated by dash-dotted lines, which are denoted by respective reference characters L1, L2, and L3, in place of the center lines L1, L2, and L3. - As illustrated in
Fig. 5 , themotorcycle 1 has arear cushion unit 95 provided between a rear portion of the body frame 20 (typically a rear portion of the left seat frame 26) and a rear portion of theengine unit 40. Therear cushion unit 95 is supported by theleft seat frame 26 and thetransmission case 60. - As illustrated in
Fig. 9 , theair cleaner 100 is connected to theintake pipe 54 for introducing air to theengine unit 42. In the present embodiment, a connectingportion 43 of theintake pipe 54 for connecting theintake pipe 54 to theengine 42 and a connectingportion 55 of theintake pipe 54 for connecting theintake pipe 54 to the air cleaner 100 (second case 140) are disposed on the vehicle center line L1, as viewed in plan. With such a configuration, theintake pipe 54 has no or, if any, a little bend in a right/left direction. Therefore, the air-intake characteristics of theengine 42 are good, and the engine performance improves. In other words, theintake pipe 54 is allowed to extend straight as viewed in plan, so the air-intake resistance can be reduced and the engine performance can be improved. - The
rear fender 80 has anupper portion 82 positioned above therear wheel 9 andside portions rear wheel 9. Theair cleaner 100 forms at least a portion of theupper portion 82 of therear fender 80. As illustrated inFigs. 6 and11 , the air cleaner 100 (first case 110) and therear wheel 9 are disposed so as to overlap each other as viewed from side. - The front-to-rear length of the right side portion of the
air cleaner 100 is set longer than the front-to-rear length of the left side portion thereof. Theair inlet unit 120 is provided for one of the left and right side portions of theair cleaner 100 with respect to the vehicle center line L1 that has a longer front-to-rear length than the other. In the present embodiment, theair inlet unit 120 is provided on the right side portion (the later-described first case 110) of theair cleaner 100. - As illustrated in
Fig. 12 , theair cleaner 100 has theair cleaner case 105 including afirst case 110 and asecond case 140 each having an opening formed therein, and amain filter element 170 for cleaning air. Thefirst case 110 and thesecond case 140 are assembled to each other so that their openings face each other with themain filter element 170 interposed therebetween. Thus, themain filter element 170 is accommodated in theair cleaner case 105 so that it divides the interior of theair cleaner case 105 into a first chamber 115 (i.e., the internal space of the first case 110) and a second chamber 145 (i.e., the internal space of the second case 140). Themain filter element 170 may be either a dry-type element (an element not impregnated with oil) or a wet-type element (an element impregnated with oil). - In the present specification, the phrase "the
main filter element 170 divides the interior of theair cleaner case 105 into thefirst chamber 115 and thesecond chamber 145" means to include not only a case in which themain filter element 170 forms the entire dividing wall but also a case in which themain filter element 170 forms a portion of the dividing wall. - The
main filter element 170 is fitted to aframe 174. Themain filter element 170 can be easily fitted into thecase 105 together with theframe 174 by respectively fitting engagingportions frame 174 into engaginggrooves air cleaner case 105. In addition, in case that themain filter element 170 needs to be replaced, themain filter element 170 can be easily removed, so the maintenance can be carried out easily. - The above-described
air inlet unit 120 is connected to thefirst case 110. More specifically, thefirst case 110 of theair cleaner 100 is provided with theair inlet unit 120 for sucking the air outside theair cleaner case 105 into thefirst chamber 115. As described previously, theair inlet unit 120 has theair inlet port 122 for sucking air and theintake passage 130 extending upward from the air cleaner case 105 (more specifically from the first case 110). As illustrated inFig. 13 , theintake passage 130 has anair outlet port 132 for blowing off air into thefirst chamber 115. As illustrated inFig. 12 , theair outlet port 132 opens in a direction that intersects apre-filter element 138. Theair outlet port 132 opens in a direction that does not intersect themain filter element 170. - As illustrated in
Figs. 12 andFig. 13 , thepre-filter element 138 comprising a wet-type element (that is, an element impregnated with oil) is disposed in thefirst chamber 115. Thepre-filter element 138 is disposed spaced apart from theair outlet port 132 so as to be positioned on the axis line of theair outlet port 132. Thepre-filter element 138 is disposed so that the blown-off air can hit thepre-filter element 138 but does not pass through thepre-filter element 138. - In the present specification, the phrase "air passes through the
pre-filter element 138" means that the air passes through thepre-filter element 138 without substantially changing its flow direction. Therefore, such an air flow that hits thepre-filter element 138 in the front and leaks from the side faces of thepre-filter element 138, not flowing out from the back face of thepre-filter element 138, does not fit the definition of the phrase "air passes through the pre-filter element" herein. - As indicated by the dash-dot-dot line X in
Fig. 13 , it is preferable that theair outlet port 132 be disposed so that theair outlet port 132 faces a central portion of thepre-filter element 138. In other words, it is preferable that theair outlet port 132 be disposed so that the central region of thepre-filter element 138 is positioned on an extension line of theair outlet port 132. In the present embodiment, theair outlet port 132 is disposed between themain filter element 170 and thepre-filter element 138, as illustrated inFig. 12 . It is preferable that theair outlet port 132 be disposed so that thepre-filter element 138 is positioned on an extension line of at least a portion of theair outlet port 132. It is more preferable that theair outlet port 132 be disposed so that thepre-filter element 138 is positioned on the extension line of theair outlet port 132. In addition, it is preferable that the distance between theair outlet port 132 and thepre-filter element 138 be shorter than the distance between theair outlet port 132 and themain filter element 170. Such a configuration allows the air outside the air cleaner to hit thepre-filter element 138 more effectively. - It is preferable that the surface area of the
pre-filter element 138 be greater than the opening area of theair outlet port 132. In addition, it is preferable that thepre-filter element 138 has a surface area greater than the maximum flow passage cross-sectional area of theintake passage 130. Such a configuration allows the air blown off from theair outlet port 132 to hit thepre-filter element 138 sufficiently because the surface area of thepre-filter element 138 is greater. As a result, the air sucked from outside can be cleaned in good condition by thepre-filter element 138. - In the present specification, the term "the surface area of the
pre-filter element 138" means the area of the surface of thepre-filter element 138 that is exposed to thefirst chamber 115 and it does not include the area thereof that is in contact with an opposingwall 136. - It is preferable that the surface area of the
main filter element 170 be greater than the surface area of thepre-filter element 138. Such a configuration allows large dust to fall off at thepre-filter element 138 and at the same time relatively small dust to be captured in thepre-filter element 138, so that the air sucked from outside can be preliminarily cleaned. Thereafter, the air can be further cleaned in themain filter element 170. - In the present specification, the term "the surface area of the
main filter element 170" means the entire surface area of themain filter element 170 with which the air can be in contact when the air passes from thefirst chamber 115 to thesecond chamber 145. - The
first case 110 of theair cleaner 100 has an opposingwall 136 facing theair outlet port 132 and not allowing air to pass therethrough. The opposingwall 136 faces themain filter element 170 in thefirst chamber 115. The opposingwall 136 extends in a vertical direction. Thepre-filter element 138 provided on the opposingwall 136 is disposed so as to extend in a vertical direction. Large dust contained in the air sucked from outside tends to fall off after it strikes thepre-filter element 138. As a result, large dust is not captured by thepre-filter element 138 in a large amount, so thepre-filter element 138 is inhibited from clogging. - In the present embodiment, the
first case 110 of theair cleaner 100 hashook members wall 136. Thepre-filter element 138 is hooked on thehook members pre-filter element 138 is provided on the opposingwall 136. As illustrated inFig. 12 , thehook members 134 are fitted infitting holes 139 formed in thepre-filter element 138 so that thepre-filter element 138 can be mounted onto the opposingwall 136. Such a configuration makes the maintenance of thepre-filter element 138 easy. - In the present embodiment, the
pre-filter element 138 is detachably mounted to the opposingwall 136 by being hooked on thehook members pre-filter element 138 to the opposingwall 136 is not particularly limited. For example, thepre-filter element 138 may be mounted directly to the opposingwall 136 by using, for example, an adhesive agent. - In addition, an example of a modified embodiment is shown in
Fig. 14 , in which apre-filter element 238 is fitted into and removed from aslot 116 provided in a front end portion of thefirst case 110. Thepre-filter element 238 inserted from theslot 116 into thefirst chamber 115 is prevented from moving in the frontward and rearward directions by apositioning wall 118 formed in thefirst chamber 115. In addition, thepre-filter element 238 is prevented from moving in the leftward and rightward directions by apositioning wall 117 formed in thefirst chamber 115. When thepre-filter element 238 is fitted in thefirst chamber 115, theslot 116 is closed by a lid or the like so that the outside air does not flow in through theslot 116. - In the present embodiment, the
pre-filter element 138 is provided on a portion of the opposing wall 136 (that is, near the air outlet port 132), but this configuration is merely illustrative. For example, thepre-filter element 138 may be provided over the entire surface of the opposingwall 136. Alternatively, thepre-filter element 138 may be provided on a wall that makes up thefirst chamber 115 but does not oppose the main filter element 170 (i.e., a different wall from the opposing wall 136). - The
second case 140 of theair cleaner 100 is provided with thedischarge passage 148 for discharging the air within thesecond chamber 145 out of theair cleaner case 105. In the present embodiment, thedischarge passage 148 constitutes a part of theintake pipe 54 that allows thesecond case 140 of theair cleaner 100 to communicate with theengine 42. - In the
air cleaner apparatus 102, the air outside theair cleaner case 105 is sucked from theair inlet port 122. The sucked air passes through theintake passage 130 and flows from theair outlet port 132 toward a central portion of thepre-filter element 138. When the sucked air strikes thepre-filter element 138, large dust contained in the air falls off into thefirst chamber 115. On the other hand, a portion of small dust contained in the air is not captured by thepre-filter element 138 and is allowed to flow, while the other portion thereof is captured by thepre-filter element 138. Thus, the air is cleaned by thepre-filter element 138. - Meanwhile, as the small dust is kept captured by the
pre-filter element 138, clogging may occur in thepre-filter element 138 to some degree. However, the air that has been sucked in thefirst chamber 115 can pass through themain filter element 170 without passing through thepre-filter element 138. In addition, the sucked air strikes the surface of thepre-filter element 138 and changes its flow direction. Therefore, the increase of the air resistance resulting from the clogging can be inhibited. - The air cleaned by the
pre-filter element 138 thereafter passes through themain filter element 170. At this time, the small dust that was not captured by thepre-filter element 138 is captured by themain filter element 170. As a result, the air that has been cleaned in good condition can be supplied to theengine 42. - Next, the
air inlet port 122 of theintake passage 130 will be described in detail. As illustrated inFigs. 6 and7 , at least a portion of theair inlet port 122 of theintake passage 130 faces theright side wall 182 of thestorage box 180. - In the present embodiment, the
intake passage 130 is formed by a duct that cannot contract or expand. In such a configuration, the length of theintake passage 130 is invariable, and accordingly, the length of the whole intake passage of the engine 42 (that is, theintake passage 130 of theair inlet unit 120, the passage in theair cleaner 100, and the intake pipe 54) is invariable. As a result, fluctuations in the intake pulse can be suppressed, and the performance of theengine 42 is stabilized. - As illustrated in
Figs. 3 and6 , theright side wall 182 of thestorage box 180 is positioned to the left of theright seat frame 28. A recessedportion 190 recessed toward the left is formed in theright side wall 182 of thestorage box 180. Theright side wall 182 of thestorage box 180 has afront side wall 184, arear wall 186 extending leftward from the rear end of thefront side wall 184, and arear side wall 188 extending rearward from the leftmost end of therear wall 186. The recessedportion 190 is defined by at least therear wall 186 and therear side wall 188. - As illustrated in
Figs. 3 and5 , thestorage box 180 has theleft side wall 192 positioned to the right of theleft seat frame 26. A recessedportion 200 recessed toward the right is formed in theleft side wall 192 of thestorage box 180. Theleft side wall 192 of thestorage box 180 has afront side wall 194, arear wall 196 extending rightward from the rear end of thefront side wall 194, and arear side wall 198 extending rearward from the rightmost end of therear wall 196. The recessedportion 200 is defined by at least therear wall 196 and therear side wall 198. - As illustrated in
Fig. 4 , in the present embodiment, at least a portion of theair inlet port 122 of theintake passage 130 is disposed within the recessedportion 190. That is, as illustrated inFig. 2 , when viewed from the front of themotorcycle 1, at least a portion of theair inlet port 122 is hidden behind thestorage box 180 and cannot be seen. The mud, dust, water, and the like that are splashed up by thefront wheel 7 do not enter the recessedportion 190 easily. As a result, entry of mud, dust, water and the like into theair inlet port 122 is inhibited. - Preferably, at least a portion of the
air inlet port 122 of theintake passage 130 faces therear wall 186. In the present embodiment, as illustrated inFig. 7 , theair inlet port 122 of theintake passage 130 has afirst portion 124 that opens frontward and asecond portion 126 that opens (i.e., has an opening) leftward. As illustrated inFig. 4 , theair inlet port 122 is disposed so that therightmost end 187 of therear wall 186 is positioned more to the right than therightmost end 125 of thefirst portion 124. Thefirst portion 124 of theair inlet port 122 faces therear wall 186 of theright side wall 182. Thesecond portion 126 of theair inlet port 122 faces therear side wall 188 of theright side wall 182. By disposing thefirst portion 124 of theair inlet port 122 so as to face therear wall 186 and disposing thesecond portion 126 of theair inlet port 122 so as to face therear side wall 188 in this way, the advantageous effects of disposing theair inlet port 122 within the recessedportion 190 can be obtained without reducing the size of theair inlet port 122. That is, both ensuring sufficient housing space of thestorage box 180 and preventing the entry of dust into theair cleaner 100 can be achieved at the same time. - As illustrated in
Fig. 9 , theair inlet port 122 of the present embodiment has an L-shape as viewed in plan, but is not limited to having such a shape. For example, theair inlet port 122 may have a shape such as to open obliquely leftward and frontward. - The
air inlet port 122 is disposed in the space between the right of theright side wall 182 of thestorage box 180 and the left of theright seat frame 28, which has been an unutilized space in the past. Thus, it is not necessary to provide extra space for theair inlet port 122, and it is possible to utilize the existing space effectively. Moreover, the water, mud, dust, and the like that are splashed up from thefront wheel 7 are unlikely to enter theair inlet port 122 because at least a portion of theair inlet port 122 is disposed so as to face theright side wall 182 of thestorage box 180. As a result, the amount of dust and the like sucked into theair cleaner 100 is reduced, so the performance deterioration of theengine 42 can be inhibited effectively. - Preferably, as illustrated in
Fig. 6 , at least a portion of theair inlet port 122 is disposed so as to overlap theright seat frame 28 when viewed from the side of the vehicle. With such a configuration, entry of mud and dust into theair inlet port 122 can be inhibited by theright seat frame 28. - In the
motorcycle 1 according to the present embodiment, theintake passage 130 connected to theair cleaner 100 is disposed in the space between the right of theright side wall 182 of thestorage box 180 and the left of theright seat frame 28. For this reason, anotherintake passage 210 extending upward from thetransmission case 60 can be disposed to the left of the vehicle center line L1 so as not to interfere with theintake passage 130 connected to theair cleaner 100, as illustrated inFigs. 3 and5 . In other words, theintake passage 210 can be disposed in the space between the left of theleft side wall 192 of thestorage box 180 and the right of theleft seat frame 26. - The
intake passage 210 is a passage for introducing cooling air to theCVT 62 in thetransmission case 60. As illustrated inFig. 5 , theintake passage 210 has a bellows-shapedduct 214 that can freely contract and expand, and aduct 216 integrally formed with the recessedportion 200 of theleft side wall 192 of the storage box. - An
air inlet port 212 that opens leftward is formed at a distal end portion of theduct 216. At least a portion of theair inlet port 212 is disposed within the recessedportion 200. Theair inlet port 212 is an opening for sucking air. In the present embodiment, the entirety of theair inlet port 212 is disposed within the recessedportion 200. Theair inlet port 212 opens toward the left from arear side wall 198 of theleft side wall 192. However, like the above-describedair inlet port 122 of theintake passage 130, it is sufficient that at least a portion of theair inlet port 212 should face therear wall 196. The mud, dust, water, and the like that are splashed up by thefront wheel 7 does not easily enter the recessedportion 200. As a result, entry of mud, dust, water and the like through theair inlet port 212 into thetransmission case 60 can be inhibited. - Next, the
rear fender 80 will be described in detail. As illustrated inFig. 9 , theair cleaner 100 forms at least a portion of theupper portion 82 of therear fender 80. In the present embodiment, a portion of theupper portion 82 of therear fender 80 is formed by thesecond case 140. Thefirst case 110 is disposed at a side of therear fender 80. By disposing thefirst case 110 at a side of therear fender 80 in this way, thesecond case 140 is ensured to have a large capacity. - The portion of the
rear fender 80 excluding the air cleaner 100 (hereinafter referred to as a "main fender portion 86") and theair cleaner 100 are assembled with each other. As illustrated inFig. 9 , themain fender portion 86 and thesecond case 140 of theair cleaner 100 are fastened to each other by afastener 90A in theupper portion 82 of therear fender 80. As illustrated inFig. 10 , themain fender portion 86 and thesecond case 140 of theair cleaner 100 are fastened to each other by afastener 90B in theleft side portion 84B of therear fender 80. As illustrated inFig. 11 , themain fender portion 86 and thefirst case 110 of theair cleaner 100 are fastened to each other by afastener 90C in theright side portion 84A of therear fender 80. Examples of thefasteners 90A to 90C in the present embodiment include commonly-used bolts, screws, and rivets. - As illustrated in
Fig. 5 , theengine unit 40 and theair cleaner 100, which is a part of therear fender 80, are fastened to each other by afastener 92A. As illustrated inFig. 6 , themain fender portion 86, which is a part of therear fender 80, and theengine unit 40 are fastened to each other by afastener 92B. Thus, theair cleaner 100 and themain fender portion 86 are fixed to each other, and in addition, theair cleaner 100 and themain fender portion 86 are both fixed to theengine unit 40. Therefore, even when therear fender 80 swings, theair cleaner 100 and themain fender portion 86 can be prevented from chattering and position shifting. - As illustrated in
Fig. 9 , theleftmost end 142 of the air cleaner 100 (more specifically, theleftmost end 142 of the second case 140) is positioned to the left of the vehicle center line L1. Therightmost end 112 of the air cleaner 100 (more specifically, therightmost end 112 of the first case 110) is positioned to the right of the vehicle center line L1. The entire lateral part of afront portion 150 of therear fender 80 is formed by theair cleaner 100. By forming the entire part of thefront portion 150 of therear fender 80 by theair cleaner 100 in this way, the width of theair cleaner 100 can be made large. As a result, theair cleaner 100 can be ensured to have a large capacity. It should be noted that in the present embodiment, thefront portion 150 of therear fender 80 is the front end face of theair cleaner 100, but thefront portion 150 may be a portion that is more rearward than the front end face. - A
boundary 152 between themain fender portion 86 and theair cleaner 100 is inclined with respect to the vehicle center line L1, as viewed in plan. Theair cleaner 100 is formed so that its front-to-rear length is longer either toward the right or toward the left, as viewed in plan. In the present embodiment, a portion of theboundary 152 between themain fender portion 86 and the air cleaner 100 (more specifically, a region on the right of the laterally central part of the air cleaner 100) is inclined with respect to the vehicle center line L1 as viewed in plan. In other words, theair cleaner 100 is formed so that its front-to-rear length is longer from the left toward the right. With such a configuration, theair cleaner 100 can be ensured to have a large capacity. When theair cleaner 100 has a large capacity, a large amount of air can be sucked in at one time, so that the engine performance can be improved. - As illustrated in
Fig. 4 , theair cleaner 100 is formed so that, as viewed in plan, its front-to-rear length is longer from one of the left and right sides on which thefootrest 35 is provided toward the other. In the present embodiment, thefootrest 35 is provided on theleft seat frame 26. Theair cleaner 100 is formed so that its front-to-rear length is longer from the left toward the right. Thus, by making the front-to-rear length of theair cleaner 100 longer while avoiding the interference between theair cleaner 100 and thefootrest 35, theair cleaner 100 can be ensured to have a large capacity. - As illustrated in
Fig. 9 , in the present embodiment, a recessedportion 88 in which a portion of the rear cushion unit 95 (seeFig. 5 ) can be accommodated is formed in a left portion of therear fender 80. The middle position between theleftmost end 142 and therightmost end 112 of the air cleaner 100 (see reference character L4 inFig. 9 ) is biased rightward from the vehicle center line L1. In other words, the middle position of theair cleaner 100 is biased toward the opposite side to one of the left and right sides of the vehicle center line L1 in which the recessedportion 88 of therear fender 80 is formed. - As illustrated in
Fig. 11 , in the present embodiment, the lower end 108 (for example, the bottom face portion of the first chamber 115) of theair cleaner 100 is positioned to be lower than the middle position between anupper end 81 A and alower end 81B of therear fender 80. Theupper end 81A of therear fender 80 refers to the vertically uppermost portion of themain fender portion 86 in therear fender 80 mounted to theengine unit 40. Typically, the vertically uppermost portion of themain fender portion 86 and the vertically uppermost portion of theair cleaner 100 are located at substantially the same height from the ground. Thelower end 81B of therear fender 80 refers to the vertically lowermost portion of themain fender portion 86 in therear fender 80 mounted to theengine unit 40. With such a configuration, the position of theseat 13 can be made low, for example, because theair cleaner 100 is disposed at a low position. Note that thelower end 108 of theair cleaner 100 may be a bottom face portion of thesecond chamber 145, depending on the shape of theair cleaner 100. - The vertical length of the
air cleaner 100 varies from the front toward the rear. As illustrated inFig. 11 , in the present embodiment, the maximum vertical length of the air cleaner 100 (for example, the maximum vertical length of the first chamber 115) is shorter than the vertical length of therear fender 80 at theupper end 81A position (in other words, the vertical length thereof in the vertical cross section through the position of theupper end 81A). With such a configuration, an additional spatial margin can be ensured above theair cleaner 100 because the vertical length of theair cleaner 100 is short. As a result, it becomes possible to dispose other vehicle components above theair cleaner 100, for example. Alternatively, the position of theseat 13 may be lowered, for example. Note that the maximum vertical length of theair cleaner 100 may be the maximum vertical length of thesecond chamber 145, depending on the shape of theair cleaner 100. - The
air cleaner 100 forms at least a portion of theupper portion 82 of therear fender 80, and therefore, it is not necessary to dispose an air cleaner separately above the rear fender 80 (for example, over the rear fender 80). Accordingly, there is a greater additional spatial margin than the case in which an air cleaner is disposed above the rear fender, so the capacity of theair cleaner 100 can be made larger. Thereby, the air cleaning performance of theair cleaner 100 can be improved. - As described above, the
air cleaner apparatus 102 according to the present embodiment has thedischarge passage 148, theair inlet unit 120, and theair cleaner case 105, as illustrated inFig. 12 . The air sucked in from the outside of theair cleaner case 105 passes through theintake passage 130 and flows from theair outlet port 132 into thefirst chamber 115. Because thepre-filter element 138 is disposed spaced apart from theair outlet port 132 so as to be positioned on the axis line of theair outlet port 132, at least part of the air sucked into thefirst chamber 115 hits thepre-filter element 138. As a result, large dust contained in the air strikes thepre-filter element 138 and thereafter falls off. This inhibits thepre-filter element 138 from being clogged because of the large dust. Therefore, thepre-filter element 138 is unlikely to be clogged. On the other hand, relatively small dust may be captured by thepre-filter element 138 when it strikes thepre-filter element 138. For this reason, if the air is kept sucked from outside, it is possible that the small dust may cause clogging to some degree in thepre-filter element 138. Nevertheless, the air resistance can be inhibited from increasing even if some clogging occurs in thepre-filter element 138, because the air sucked from outside can pass through themain filter element 170 without passing through thepre-filter element 138. The air hits thepre-filter element 138 and thereafter passes through themain filter element 170 disposed between thefirst chamber 115 and thesecond chamber 145. As a result, small dust or the like that has not been captured by thepre-filter element 138 can be captured by the main filter element. - As illustrated in
Fig. 12 , in the present embodiment, theair cleaner case 105 has the opposingwall 136 facing theair outlet port 132 and not allowing air to pass therethrough. Thepre-filter element 138 is provided on the opposingwall 136. Thus, the above-described advantageous effects can be obtained with the simple structure of providing thepre-filter element 138 on the opposingwall 136. - In the present embodiment, the opposing
wall 136 faces themain filter element 170 in thefirst chamber 115. Thus, themain filter element 170 and thepre-filter element 138 are disposed at such positions that they oppose each other in thefirst chamber 115, so most of the air sucked from outside is allowed to hit thepre-filter element 138 first. As a result, the air can be cleaned in good condition. - In the present embodiment, the
pre-filter element 138 is detachably mounted to the opposingwall 136. This makes it possible to replace thepre-filter element 138 easily when clogging occurs in thepre-filter element 138 and the cleaning performance of thepre-filter element 138 degrades. In other words, maintenance of thepre-filter element 138 can be carried out easily. - In the present embodiment, the
pre-filter element 138 is mounted directly to the opposingwall 136. Therefore, the need for the complicated structure for mounting thepre-filter element 138 to the opposingwall 136 is eliminated, and the structure of theair cleaner apparatus 102 can be simplified. - In the present embodiment, the
air cleaner case 105 hashook members 134 protruding from the opposingwall 136. Thepre-filter element 138 is hooked on the hook members. For this reason, thepre-filter element 138 can be attached to and detached from the opposingwall 136 easily. In other words, maintenance of thepre-filter element 138 can be carried out easily. - In the present embodiment, the
pre-filter element 138 is provided on a portion of the opposingwall 136. Thus, by disposing thepre-filter element 138 on a portion of the opposingwall 136 that the air sucked from outside can hit easily, cleaning of air can be carried out with thepre-filter element 138 having a smaller size. - In the present embodiment, the opposing
wall 136 extends in a vertical direction. Therefore, large dust contained in the air that has been sucked from outside falls off after it strikes thepre-filter element 138 provided on the wall extending in a vertical direction. That is, large dust can be removed more effectively. - In the present embodiment, the
air outlet port 132 is disposed between themain filter element 170 and thepre-filter element 138. Thus, themain filter element 170 and thepre-filter element 138 are disposed at opposing positions across theair outlet port 132, so most of the air sucked from outside is allowed to hit thepre-filter element 138 first. As a result, the air can be cleaned in good condition. - In the present embodiment, the surface area of the
pre-filter element 138 is greater than the maximum flow passage cross-sectional area of theintake passage 130. Thus, thepre-filter element 138 has a greater surface area, and therefore, the air blown off from theair outlet port 132 is allowed to hit thepre-filter element 138 sufficiently. As a result, the air sucked from outside can be cleaned in good condition by thepre-filter element 138. - In the present embodiment, the surface area of the
main filter element 170 is greater than the surface area of thepre-filter element 138. Thus, the air sucked from outside can be preliminarily cleaned in thepre-filter element 138 by causing large dust to fall off at thepre-filter element 138 and at the same time small dust to be captured in thepre-filter element 138, and thereafter, the air can be cleaned sufficiently in themain filter element 170. - In the present embodiment, the
main filter element 170 comprises a dry-type element. This makes handling and maintenance of the main filter element easy. - In the present embodiment, the
air outlet port 132 opens in a direction that does not intersect themain filter element 170. This reduces the air sucked from the outside of theair cleaner case 105 that directly hits themain filter element 170. - In the present embodiment, the
air outlet port 132 opens in a direction that intersects themain filter element 138. This enables most of the air that is sucked from the outside of theair cleaner case 105 to directly hit thepre-filter element 138. -
- 1 -- Motorcycle (straddle-type vehicle)
- 100 -- Air cleaner
- 102-- Air cleaner apparatus
- 105 -- Air cleaner case
- 115 -- First chamber
- 130 -- Intake passage
- 132 -- Air outlet port
- 134 -- Hook member
- 136 -- Opposing wall
- 138 -- Pre-filter element (wet-type element)
- 145 -- Second chamber
- 148 -- Discharge passage
- 170 -- Main filter element (dry-type element)
Claims (15)
- An air cleaner apparatus comprising:an air cleaner case for mounting to a straddle-type vehicle;a main filter element accommodated in the air cleaner case and dividing an interior of the air cleaner case into a first chamber and a second chamber;an intake passage for sucking air outside the air cleaner case into the first chamber;a discharge passage for discharging the air within the second chamber out of the air cleaner case; anda pre-filter element disposed in the first chamber and comprising a wet-type element, and wherein:the intake passage has an air outlet port for blowing off the air into the first chamber; andthe pre-filter element is disposed spaced apart from the air outlet port so as to be positioned on an axis line of the air outlet port.
- The air cleaner apparatus according to claim 1, wherein:the air cleaner case has an opposing wall facing the air outlet port and not allowing air to pass therethrough; andthe pre-filter element is provided on the opposing wall.
- The air cleaner apparatus according to claim 2, wherein the opposing wall faces the main filter element in the first chamber.
- The air cleaner apparatus according to claim 2, wherein the pre-filter element is detachably mounted to the opposing wall.
- The air cleaner apparatus according to claim 2, wherein the pre-filter element is mounted directly to the opposing wall.
- The air cleaner apparatus according to claim 2, wherein:the air cleaner case has a hook member protruding from the opposing wall; andthe pre-filter element is hooked on the hook member.
- The air cleaner apparatus according to claim 2, wherein the pre-filter element is provided on a portion of the opposing wall.
- The air cleaner apparatus according to claim 2, wherein the opposing wall extends in a vertical direction.
- The air cleaner apparatus according to claim 1, wherein the air outlet port is disposed between the main filter element and the pre-filter element.
- The air cleaner apparatus according to claim 1, wherein the pre-filter element has a surface area greater than the maximum flow passage cross-sectional area of the intake passage.
- The air cleaner apparatus according to claim 1, wherein the main filter element has a surface area greater than the surface area of the pre-filter element.
- The air cleaner apparatus according to claim 1, wherein the main filter element comprises a dry-type element.
- The air cleaner apparatus according to claim 1, wherein the air outlet port opens in a direction that does not intersect the main filter element.
- The air cleaner apparatus according to claim 1, wherein the air outlet port opens in a direction that intersects the pre-filter element.
- A straddle-type vehicle comprising an air cleaner apparatus according to any one of claims 1 through 14.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011289098A JP2013136998A (en) | 2011-12-28 | 2011-12-28 | Air cleaner apparatus and straddle-type vehicle with the same |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2610476A2 true EP2610476A2 (en) | 2013-07-03 |
EP2610476A3 EP2610476A3 (en) | 2016-01-20 |
EP2610476B1 EP2610476B1 (en) | 2017-12-06 |
Family
ID=47142942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12189795.3A Active EP2610476B1 (en) | 2011-12-28 | 2012-10-24 | Air cleaner apparatus and straddle-type vehicle equipped with the apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2610476B1 (en) |
JP (1) | JP2013136998A (en) |
CN (1) | CN103184957B (en) |
IN (1) | IN2012KO01020A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014207167A1 (en) * | 2014-04-15 | 2015-10-15 | Bayerische Motoren Werke Aktiengesellschaft | Intake device with formally integrated Luftführungsansaugkanal |
KR101734734B1 (en) * | 2015-12-31 | 2017-05-11 | 현대자동차주식회사 | Intake System of Drawer type Air Cleaner For Improving Maintenance Convenience and Vehicle thereby |
JP6376157B2 (en) * | 2016-03-03 | 2018-08-22 | マツダ株式会社 | Engine intake system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08144876A (en) | 1994-11-17 | 1996-06-04 | Suzuki Motor Corp | Air filter mounting structure of engine for vehicle |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1926433A (en) * | 1932-11-26 | 1933-09-12 | Cartmell John | Air cleaner |
GB563844A (en) * | 1943-05-17 | 1944-08-31 | Talboys Mfg Company Ltd | Improvements in or relating to air and like cleaners |
JPS5941322Y2 (en) * | 1979-10-29 | 1984-11-28 | スズキ株式会社 | Air cleaner for motorcycle engines, etc. |
KR100470775B1 (en) * | 2001-11-19 | 2005-03-08 | 기아자동차주식회사 | Air Cleaner for Vehicle |
DE10200673B4 (en) * | 2002-01-10 | 2007-06-14 | Siemens Ag | Automotive air filter |
US7041146B2 (en) * | 2003-09-10 | 2006-05-09 | Visteon Global Technologies, Inc. | Pre-filters for engine air cleaning systems |
DE10354686A1 (en) * | 2003-11-22 | 2005-06-16 | Mann + Hummel Gmbh | Intake system for an internal combustion engine |
JP2006088895A (en) * | 2004-09-24 | 2006-04-06 | Yamaha Motor Co Ltd | Saddle riding type vehicle |
KR100680539B1 (en) * | 2004-11-25 | 2007-02-08 | 현대자동차주식회사 | Air cleaner |
US7540895B2 (en) * | 2005-12-16 | 2009-06-02 | Fleetguard, Inc. | Multiple flow filter system |
JP5384263B2 (en) * | 2009-09-11 | 2014-01-08 | 本田技研工業株式会社 | Vehicle air cleaner structure |
-
2011
- 2011-12-28 JP JP2011289098A patent/JP2013136998A/en active Pending
-
2012
- 2012-09-05 IN IN1020KO2012 patent/IN2012KO01020A/en unknown
- 2012-10-24 EP EP12189795.3A patent/EP2610476B1/en active Active
- 2012-10-31 CN CN201210427638.4A patent/CN103184957B/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08144876A (en) | 1994-11-17 | 1996-06-04 | Suzuki Motor Corp | Air filter mounting structure of engine for vehicle |
Also Published As
Publication number | Publication date |
---|---|
EP2610476A3 (en) | 2016-01-20 |
CN103184957B (en) | 2015-05-13 |
EP2610476B1 (en) | 2017-12-06 |
JP2013136998A (en) | 2013-07-11 |
IN2012KO01020A (en) | 2015-10-09 |
CN103184957A (en) | 2013-07-03 |
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