WO2019155689A1 - 鞍乗型車両の吸気ダクト構造 - Google Patents

鞍乗型車両の吸気ダクト構造 Download PDF

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Publication number
WO2019155689A1
WO2019155689A1 PCT/JP2018/038381 JP2018038381W WO2019155689A1 WO 2019155689 A1 WO2019155689 A1 WO 2019155689A1 JP 2018038381 W JP2018038381 W JP 2018038381W WO 2019155689 A1 WO2019155689 A1 WO 2019155689A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle body
intake duct
box
housing
shaped member
Prior art date
Application number
PCT/JP2018/038381
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
智樹 西島
晋 横山
信之 下村
進吾 荒井
加藤　達朗
拓也 松永
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to DE112018007046.8T priority Critical patent/DE112018007046B4/de
Priority to JP2019570295A priority patent/JP6950007B2/ja
Publication of WO2019155689A1 publication Critical patent/WO2019155689A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J40/00—Arrangements of air cleaners specially adapted for cycles
    • B62J40/10—Arrangements of air cleaners specially adapted for cycles characterised by air duct arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M7/00—Motorcycles characterised by position of motor or engine
    • B62M7/02—Motorcycles characterised by position of motor or engine with engine between front and rear wheels
    • B62M7/04—Motorcycles characterised by position of motor or engine with engine between front and rear wheels below the frame
    • 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
    • F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
    • 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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air
    • 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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • 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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10144—Connections of intake ducts to each other or to another device
    • 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

Definitions

  • the present invention relates to an intake duct structure for a straddle-type vehicle, and more particularly to an intake duct structure for a straddle-type vehicle that is applied to an intake duct that introduces outside air into an air cleaner box.
  • a straddle-type vehicle such as a motorcycle has an air cleaner box that filters outside air introduced into an intake port of an engine, and an air duct for introducing outside air is connected to an end of the air cleaner box.
  • an air cleaner box that filters outside air introduced into an intake port of an engine, and an air duct for introducing outside air is connected to an end of the air cleaner box.
  • an air cleaner box is arranged at the lower part of a fuel tank, an intake duct connected to the air cleaner box is extended to the front of the vehicle body, and a front end portion of the intake duct is connected to an opening provided substantially in the center of the front cowl.
  • a motorcycle is disclosed.
  • An object of the present invention is to solve the above-described problems of the prior art and provide an intake duct structure for a straddle-type vehicle capable of shortening the longitudinal length of the intake duct while preventing moisture from entering the air cleaner box.
  • the present invention is connected to an engine (E), an air cleaner box (33) for filtering outside air (W) introduced into the engine (E), and the air cleaner box (33).
  • an intake duct structure for a saddle-ride type vehicle (1) having an intake duct (50) for introducing outside air from the front of the vehicle body, at the end of the intake duct (50) on the vehicle body front side
  • An air inlet (60) is provided, and a wall member (54a) facing the air inlet (60) is disposed at a position behind the vehicle body of the air inlet (60) inside the air intake duct (50).
  • the first feature is that it is provided.
  • the saddle riding type vehicle (1) includes a front fork (11) that supports a front wheel (WF), and the intake port (60) is located outside the front fork (11) in the vehicle width direction and behind the vehicle body. There is a second feature in that it is provided at the position.
  • the intake duct (50) includes a housing (52) that houses the wall member (54a) and a connecting pipe (56) that is connected to the rear portion of the housing (52).
  • a third feature is that the outside air (W) introduced from the intake port (60) is bent back into the housing (52) and then introduced into the connecting pipe (56).
  • the housing (52) accommodates a box-shaped member (54) having a shape in which a rear surface of the box body is opened, and the wall member (54a) is disposed in front of the box-shaped member (54).
  • the outside air (W) introduced from the intake port (60) is introduced into the connection pipe (56) after passing above the box-like member (54) and outside in the vehicle width direction.
  • the housing (52) is disposed in the rear of the box-shaped member (54) in the vicinity of the vehicle body so that the inner space of the housing (52) is separated from the first chamber (A) on the vehicle body upper side and the first chamber (A) on the vehicle body lower side.
  • a partition plate (52b) for partitioning into two chambers (B) is provided, and outside air (W) flowing to the rear of the vehicle body above the box-shaped member (54) is transferred to the vehicle body in the first chamber (A).
  • a fifth feature is that after being folded forward, the partition plate (52b) is folded back in front of the vehicle body and inside the box-shaped member (54) and is introduced into the connection pipe (56). There is.
  • the sixth feature is that the connecting pipe (56) is inserted and fixed in the rear part of the second chamber (B).
  • the seventh feature is that the front end of the connecting pipe (56) is fixed to the wall (74) of the box-shaped member (54).
  • an eighth feature is that the housing (52) has a tapered shape in which the dimension in the vehicle width direction gradually increases toward the rear of the vehicle body.
  • the wall member (54a) has a ninth feature in that the wall member (54a) is disposed so as to be inclined so that the upper side of the vehicle body is located behind the lower side of the vehicle body.
  • an intake port (60) is provided at an end of the intake duct (50) on the vehicle body front side.
  • a wall member (54a) facing the intake port (60) is disposed in the intake duct (50) at a position behind the vehicle body of the intake port (60).
  • the saddle riding type vehicle (1) includes a front fork (11) that supports a front wheel (WF), and the intake port (60) is a vehicle width of the front fork (11). Since the front and rear lengths of the intake duct can be made shorter when viewed from the side of the vehicle body, the traveling wind that flows rearward along the outer side surface of the front fork in the vehicle width direction can be efficiently taken in. It becomes possible to guide to the mouth.
  • the intake duct (50) includes a housing (52) that houses the wall member (54a), and a connecting pipe (56) that is connected to a rear portion of the housing (52). Since the outside air (W) introduced from the intake port (60) is deflected a plurality of times inside the housing (52) and then introduced into the connecting pipe (56), By extending the length of the substantial outside air passage inside, it is possible to stabilize the pressure applied to the air cleaner box by the traveling wind pressure while keeping the front and rear length of the intake duct short. Moreover, the possibility that moisture that has entered along with the traveling wind enters the air cleaner box can be further reduced by turning the outside air passage a plurality of times.
  • the housing (52) accommodates a box-shaped member (54) having a shape in which the rear surface of the box body is opened, and the wall member (54a) is formed of the box-shaped member.
  • (54) constituting the vehicle body front surface, and outside air (W) introduced from the intake port (60) passes above the box-shaped member (54) and outside in the vehicle width direction before the connection pipe. Since the outside air introduced from the intake port is introduced not only above the box-shaped member but also through the outside in the vehicle width direction of the box-shaped member into the connection pipe, the introduction of the outside air is performed. Can be performed smoothly.
  • the inner space of the housing (52) is disposed in the first chamber (A) on the upper side of the vehicle body by being disposed close to the housing (52) behind the box-shaped member (54).
  • a second chamber (B) on the lower side of the vehicle body are provided, and the outside air (W) flowing to the rear of the vehicle body through the upper part of the box-like member (54) is provided in the first chamber (B).
  • the connecting pipe (56) is inserted and fixed in the rear part of the second chamber (B), the outside pipe folded back to the rear of the vehicle body inside the box-shaped member is efficiently connected to the connecting pipe. Can be introduced.
  • the vehicle body front end of the connection pipe (56) is fixed to the wall (74) of the box-shaped member (54), so that the housing and the connection pipe are stably fixed. be able to. Further, by inserting the front end portion of the connection pipe to the inside of the box-like member, the possibility of moisture and the like entering from the connection pipe can be further reduced.
  • the housing (52) since the housing (52) has a tapered shape in which the dimension in the vehicle width direction gradually increases toward the rear of the vehicle body, the flow rate of outside air introduced from the intake port is directed toward the rear of the vehicle body. As a result, the pressure applied to the air cleaner box can be further stabilized.
  • the wall member (54a) is disposed so as to be inclined so that the upper side of the vehicle body is located on the rear side of the vehicle body from the lower side of the vehicle body. It is possible to smoothly guide outside air from above the box-shaped member to the first chamber of the housing.
  • FIG. 1 is a left side view of a motorcycle to which an intake duct structure for a saddle riding type vehicle according to an embodiment of the present invention is applied.
  • FIG. 2 is a perspective view showing a state in which the motorcycle is viewed from the front side of the vehicle body. It is a left view which shows the structure of an intake duct and an air cleaner box.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.
  • 1 is a perspective view of a motorcycle showing a state in which an outer cover is removed from an intake duct. It is a perspective view which shows the state which removed the housing from the state of FIG. It is a perspective view which shows the state which removed the front side cover from the state of FIG.
  • FIG. 10 is a sectional view of the motorcycle cut at a position corresponding to the XV-XV line shown in FIG. 9;
  • FIG. 10 is a cross-sectional view of the motorcycle cut at a position corresponding to the XVI-XVI line shown in FIG. 9; It is sectional drawing which shows the engagement structure of an intake duct and a connection pipe.
  • FIG. 1 is a left side view of a motorcycle 1 to which an intake duct structure for a saddle-ride type vehicle according to an embodiment of the present invention is applied.
  • the body frame 3 of the motorcycle 1 as a saddle-ride type vehicle has a pair of left and right main pipes that extend from the head pipe 43 downward to the rear of the body.
  • a pair of left and right pivot plates 18 provided with a pivot 17 for pivotally supporting the swing arm 21 is connected to the lower portion of the main pipe.
  • a steering stem (not shown) is rotatably supported by the head pipe 43, and a top bridge 41 and a bottom bridge 42 that support a pair of left and right front forks 11 are fixed to the top and bottom of the steering stem. .
  • a steering handle 4 having a rearview mirror 6 is attached to the top of the top bridge 41.
  • the front wheel WF is rotatably supported at the lower end of the front fork 11.
  • the front fork 11 supports the headlight 8 positioned in front of the head pipe 43, the meter device 40, and the front fender 10 that covers the front wheel WF.
  • a 4-cycle parallel 4-cylinder engine E is suspended below the body frame 3.
  • the swing arm 21 that is pivotally supported by the pivot 17 is suspended from the vehicle body frame 3 by a rear cushion 27.
  • Rotational driving force of the engine E is transmitted to the rear wheel WR via the drive chain 20.
  • a chain cover 31 that covers the top of the drive chain 20 is attached to the upper portion of the swing arm 21.
  • a cooling water radiator 30 is disposed in front of the engine E, and the combustion gas of the engine E is guided to the catalyst device 19 via four exhaust pipes 15 that gather below the engine E.
  • a fuel tank 2 is disposed at the upper part of the vehicle body frame 3, and an air cleaner box 33 is disposed at the lower part of the fuel tank 2.
  • a pair of left and right intake ducts 50 for introducing outside air into the air cleaner box 33 are disposed outside the vehicle body frame 3 in the vehicle width direction. The outside air sucked from the front of the intake duct 50 is introduced into the bottom of the air cleaner box 33 via a connecting pipe (see FIG. 4) that passes under the vehicle body frame 3.
  • a front seat 26 on which a driver is seated is disposed at the rear of the fuel tank 2, and a rear seat 29 on which a passenger rides is disposed at the rear of the front seat 26.
  • a connection portion between the main frame and the pivot plate 18 is connected to a pair of left and right upper rear frames 45 and a lower rear frame 46 extending toward the rear of the vehicle body.
  • the seat cowl 28 is configured to cover the outer side in the vehicle width direction of the upper rear frame 45 and the lower rear frame 46.
  • a taillight 24 is attached to the rear of the seat cowl 28, and a rear fender 23 is fixed below the taillight 24.
  • the pillion step 22 a on which the passenger puts his / her foot is supported by the pillion step holder 22 attached to the lower rear frame 46.
  • FIG. 2 is a perspective view showing a state in which the motorcycle 1 is viewed from the front side of the vehicle body.
  • the bases of the pair of left and right front turn signal devices 32 are fixed to the front fork 11 below the top bridge 41.
  • the pair of left and right intake ducts 50 are disposed so as to protrude outward in the vehicle width direction at a position slightly lower than the headlight 8 and behind the front fork 11.
  • the intake duct 50 has a symmetrical structure, and includes an outer cover 51, a housing 52, and a front cover 53 made of hard resin or the like.
  • the intake port 60 of the intake duct 50 is provided on the front surface of the vehicle body. In the present embodiment, the intake port 60 is configured by a plurality of polygonal through holes formed in the front cover 53.
  • FIG. 3 is a left side view showing the configuration of the intake duct 50 and the air cleaner box 33.
  • 4 is a sectional view taken along line IV-IV in FIG.
  • the air cleaner box 33 that houses the air filter 37 has a two-part structure including an upper case 34 and a lower case 35.
  • Four intake funnels 36 connected to the intake passage of the engine E are attached at positions closer to the rear of the lower case 35.
  • a connection pipe 56 extending from the intake duct 50 is connected to the introduction pipe 55 connected to a position near the front of the lower case 35.
  • the front end portion of the connecting pipe 56 is disposed close to the rear side of the box-shaped member 54 housed in the intake duct 50.
  • the outside air introduced from the intake port 60 of the front cover 53 abuts on the front surface portion of the box-shaped member 54 and is then rectified inside the housing 52 and introduced into the connecting pipe 56.
  • FIG. 5 is a perspective view of the motorcycle 1 showing a state in which the outer cover 51 is removed from the intake duct 50.
  • the outer cover 51 When the outer cover 51 is removed, a part of the box-shaped member 54 is exposed to the outside in the vehicle width direction from the notch formed in the housing 52.
  • the space formed between the outer cover 51 and the housing 52 also functions as an expansion space that rectifies the introduced outside air.
  • the lower end portion of the housing 52 is supported by the upper end portion of the radiator 30.
  • FIG. 6 is a perspective view showing a state in which the housing 52 is removed from the state of FIG.
  • FIG. 7 is a perspective view showing a state in which the front cover 53 is removed from the state of FIG.
  • the box-shaped member 54 has a configuration in which a plate-like lower extending portion 54b is provided at the lower portion of the main body having a shape in which the rear surface of the box body is opened.
  • Two dowels 54c into which a fastening member for fixing to the housing 52 is screwed are provided on the outer side in the vehicle width direction of the main body portion of the box-shaped member.
  • the front surface of the main body is a planar wall member 54a.
  • the intake port 60 of the front cover 53 is formed in a range that slightly covers the entire wall member 54a and the lower extension 54b. According to this configuration, since the wall member 54a facing the intake port 60 is disposed at a position behind the vehicle body of the intake port 60, even if moisture such as rain enters from the intake port 60 together with the traveling wind, the wall Since it abuts on the member 54a, it is possible to prevent moisture from directly entering the back of the intake duct 50, and a substantial traveling wind path from the intake port to the duct can be taken long. To do. This makes it difficult for moisture to enter the air cleaner box 33 even if the front and rear lengths of the intake duct 50 are short, and the use of the short intake duct 50 can increase the degree of freedom in vehicle body design and layout.
  • FIG. 8 is a perspective view showing a state where the box-shaped member 54 is removed from the state of FIG.
  • the connection pipe 56 connected to the air cleaner box 33 extends between the engine E and the vehicle body frame 3 and extends forward, and is inserted and fixed to the rear portion of the housing 52.
  • a stay 56 a for supporting the box-shaped member 54 is provided at the lower end of the connecting pipe 56.
  • FIG. 9 is a front view of the intake duct 50 on the left side in the vehicle width direction.
  • FIG. 10 is a front view of the housing 52
  • FIG. 11 is a left side view of the housing 52.
  • the intake duct 50 is provided with a labyrinth structure by combining the outer cover 51, the housing 52 (dotted hatching), the front cover 53, and the box-shaped member 54, so that the intake duct 50 and the connecting pipe 56 are sufficiently short in the longitudinal length.
  • moisture such as rain introduced from the intake port 60 is configured not to enter the air cleaner box 33.
  • the housing 52 includes a bulging portion 52a that forms the upper surface of the intake duct 50 and an upper expansion space, a partition plate 52b formed at the lower end of the bulging portion 52a, and a support stay 52d for the outer cover 51. And a planar portion 52f that is disposed close to the outer cover 51.
  • a notch 52e is formed between the bulging portion 52a and the flat portion 52f to expose the box-shaped member 54 (see FIG.).
  • Two through holes 52g corresponding to the dowels 54c of the box-like member 54 are formed in the flat surface portion 52f, and below the lower extension portion 52c supported by the radiator 30 is provided.
  • FIG. 12 is a left side view showing a state in which the box-shaped member 54 is attached to the housing 52.
  • 13 is a perspective view showing a state in which the box-shaped member 54 is attached to the housing 52 and viewed from the rear side
  • FIG. 14 is a rear view showing a state in which the box-shaped member 54 is attached to the housing 52. 12 to 14, the front cover 53 and the box-shaped member 54 are indicated by dotted hatching.
  • the main body of the box-shaped member 54 includes a wall member 54a on the front surface of the vehicle body, a ceiling wall 71, an inner wall 72, an outer wall 73, and a bottom wall 74 that extend rearward from the end of the wall member 54a.
  • the bottom wall 74 is provided with a positioning projection 54c for engaging the stay 56a of the connecting pipe 56.
  • the partition plate 52b provided in the housing 52 is disposed close to the back side of the box-shaped member 54 so as to divide the space formed by the main body of the box-shaped member 54 vertically.
  • the front cover 53 includes an upper member 53a in which the air inlet 60 is formed, and a thin plate-like lower member 53b extending downward from the lower end portion of the upper member 53a.
  • the lower member 53 b of the front cover 53 and the lower extending portion 52 c of the housing 52 are fixed together with the radiator 30.
  • FIG. 15 is a cross-sectional view of the motorcycle 1 cut at a position corresponding to the line XV-XV shown in FIG.
  • the intake port 60 formed in the front cover 53 is provided at a position outside the front fork 11 in the vehicle width direction and at the rear of the vehicle body.
  • the front and rear lengths of the intake duct 50 can be made shorter when viewed from the side of the vehicle body, and traveling wind that flows rearward along the outer side surface of the front fork 11 in the vehicle width direction can be efficiently guided to the intake port 60. It becomes.
  • the labyrinth structure is configured and the length of the substantial outside air passage is extended inside the housing 52, and the air cleaner box 33 is applied to the air cleaner box 33 by the traveling wind pressure while keeping the front and rear length of the intake duct 50 short. It becomes possible to stabilize the pressure.
  • the intake duct 50 has a tapered shape in which the dimension in the vehicle width direction gradually increases toward the rear of the vehicle body.
  • the pressure applied to the air cleaner box 33 can be further stabilized by increasing the flow rate of the outside air W introduced from the intake port 60 toward the rear of the vehicle body.
  • FIG. 16 is a cross-sectional view of the motorcycle 1 cut at a position corresponding to the XVI-XVI line shown in FIG.
  • the outside air W introduced from the intake port 60 is smoothly guided to the rear by passing not only the outside in the vehicle width direction of the box-shaped member 54 but also the ceiling wall 71 of the box-shaped member 54 and the housing 52.
  • the wall member 54a is disposed so as to be inclined such that the upper side of the vehicle body is located on the rear side of the vehicle body from the lower side of the vehicle body. Thereby, the outside air W introduced from the intake port 60 can be smoothly guided from the upper side of the box-shaped member 54 to the rear side of the housing 52.
  • the partition plate 52b of the housing 52 is disposed close to the back side of the box-shaped member 54, and the distal end portion of the connection pipe 56 is disposed below the partition plate 52b.
  • the internal space of the housing 52 is partitioned into a first chamber A on the upper side of the vehicle body and a second chamber B on the lower side of the vehicle body.
  • the combination of the box-shaped member 54 and the partition plate 52b enables the outside air W to be folded back and introduced into the connecting pipe 56 with a simple structure and efficiency. Further, the labyrinth structure is multiplexed by turning the outside air passage a plurality of times, and the possibility that moisture that has entered along with the traveling wind enters the air cleaner box 33 can be further reduced.
  • partitioning the first chamber A and the second chamber B makes it possible to stably increase the pressure in the second chamber B, so that the connection pipe 56 inserted and fixed in the rear portion of the second chamber B can be efficiently external air. W can be introduced.
  • FIG. 17 is a cross-sectional view showing an engagement structure between the intake duct 50 and the connecting pipe 56.
  • the distal end portion of the connection pipe 56 is inserted and fixed to the rear end portion of the second chamber B formed in the housing 52.
  • the stay 56a provided at the tip of the connection pipe 56 engages with the positioning protrusion 54c provided on the bottom wall 74 of the box-shaped member 54, so that the housing 52 and the connection pipe 56 are stably fixed. be able to.
  • the front end portion of the connection pipe 56 to the inside of the box-shaped member 54, the possibility that moisture or the like enters from the connection pipe 56 can be further reduced.
  • the appearance shape and arrangement of the intake duct, the shape and structure of the intake port, the shape and structure of the housing and the box-shaped member are not limited to the above embodiments, and various changes can be made.
  • the intake port of the intake duct may be a large opening or the entire opening may be covered with a mesh member.
  • the engine type of the saddle riding type vehicle may be a single cylinder or a multi-cylinder engine having two or more cylinders.
  • the intake duct structure according to the present invention is not limited to a motorcycle, and can be applied to a three-wheel or four-wheel straddle-type vehicle.
  • SYMBOLS 1 ... Motorcycle (saddle-type vehicle), 11 ... Front fork, 33 ... Air cleaner box, 50 ... Intake duct, 51 ... Outer cover, 52 ... Housing, 52a ... Swelling part, 52b ... Partition plate, 53 ... Front cover 54 ... Box-shaped member, 54a ... Wall member, 56 ... Connecting pipe, 56a ... Stay, 60 ... Inlet, 74 ... Bottom wall, A ... First chamber, B ... Second chamber, E ... Engine, W ... Outside air

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
PCT/JP2018/038381 2018-02-08 2018-10-15 鞍乗型車両の吸気ダクト構造 WO2019155689A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112018007046.8T DE112018007046B4 (de) 2018-02-08 2018-10-15 Lufteinlasskanalstruktur für ein fahrzeug vom satteltyp
JP2019570295A JP6950007B2 (ja) 2018-02-08 2018-10-15 鞍乗型車両の吸気ダクト構造

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-020716 2018-02-08
JP2018020716 2018-02-08

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WO2019155689A1 true WO2019155689A1 (ja) 2019-08-15

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JP (1) JP6950007B2 (de)
DE (1) DE112018007046B4 (de)
WO (1) WO2019155689A1 (de)

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Publication number Priority date Publication date Assignee Title
JP7415818B2 (ja) 2020-06-25 2024-01-17 スズキ株式会社 鞍乗型車両

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPH07329871A (ja) * 1994-06-11 1995-12-19 Honda Motor Co Ltd スクーターの吸気装置
JP2006015963A (ja) * 2004-07-05 2006-01-19 Yamaha Motor Co Ltd 自動二輪車
US20090293830A1 (en) * 2008-05-28 2009-12-03 Mu-Chen Hung Air intake box
US20130104832A1 (en) * 2011-11-01 2013-05-02 Kwang Yang Motor Co., Ltd. Vehicle air intake mechanism

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