EP2647822B2 - Intake system for internal combustion engine - Google Patents

Intake system for internal combustion engine Download PDF

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Publication number
EP2647822B2
EP2647822B2 EP13162256.5A EP13162256A EP2647822B2 EP 2647822 B2 EP2647822 B2 EP 2647822B2 EP 13162256 A EP13162256 A EP 13162256A EP 2647822 B2 EP2647822 B2 EP 2647822B2
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EP
European Patent Office
Prior art keywords
intake
bulkhead
communication hole
air
intake system
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.)
Active
Application number
EP13162256.5A
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German (de)
English (en)
French (fr)
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EP2647822B1 (en
EP2647822A1 (en
Inventor
Nobuo Nishiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
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Publication date
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Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Publication of EP2647822A1 publication Critical patent/EP2647822A1/en
Publication of EP2647822B1 publication Critical patent/EP2647822B1/en
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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
    • F02M35/14—Combined air cleaners and silencers

Definitions

  • the present invention relates to an intake system for an internal combustion engine.
  • the present invention relates to an intake system for taking in air for combustion for an internal combustion engine from an outside, cleaning the air, and supplying the air to the internal combustion engine.
  • a motorcycle is provided with an intake system for supplying air for combustion to an internal combustion engine.
  • Some of the conventional intake systems have the configurations in which in insides thereof, filter elements for cleaning air are provided and flow channels for guiding the air taken therein to the filters are formed.
  • the configuration described in, for example, Patent Document 1 is proposed.
  • the intake system (air cleaner) described in Patent Document 1 has the configuration in which a partition portion is formed in the lid body, and a flow path is formed between the side wall portion of the lid body and the partition portion.
  • the intake system of Patent Document 1 intends to reduce the intake noise by rectifying the air, which is taken in, in the flow path.
  • Patent Document 1 has the following problem.
  • the length of the flow path is determined by the size and the shape of the intake system (in particular, the lid body). Therefore, the flow path cannot be made long, rectification of intake air becomes insufficient, and therefore, there is the fear of being incapable of reducing the intake noise. Further, if the flow path is made long, pipe resonance sound that occurs in the flow path becomes large, and therefore, there arises the fear of increasing noise. Further, if the flow path is made long, pressure loss becomes large, and therefore, there arises the fear of causing decline in the output power of the engine.
  • Patent Document 1
  • a problem to be solved by the present invention is to reduce noise in an intake system (air cleaner) of an internal combustion engine.
  • an intake system 5 air cleaner for an internal combustion engine according to the embodiment of the present invention
  • the intake system 5 for an internal combustion engine according to the embodiment of the present invention is sometimes simply called "intake system”.
  • respective orientations of the intake system 5 and the motorcycle 1 to which the intake system 5 is applied are based on an orientation of a driver who rides on the motorcycle 1.
  • a front side of the intake system 5 and the motorcycle 1 is shown by an arrow Fr
  • a rear side is shown by an arrow Rr
  • an upper side is shown by an arrow Tp
  • a lower side is shown by an arrow Bt
  • a right side is shown by an arrow R
  • a left side is shown by an arrow L, in accordance with necessity.
  • Fig. 1 is a left side view schematically showing the configuration of the motorcycle 1 to which the intake system 5 is applied.
  • Fig. 2 is a right side view schematically showing the configuration of the motorcycle 1 to which the intake system 5 is applied.
  • Fig. 3 is a right side view schematically showing the mounting configuration of the intake system 5.
  • the motorcycle 1 includes a vehicle body frame 11, a steering system 12, an engine unit 13 and a rear wheel suspension system 14. Further, the motorcycle 1 is loaded with the intake system 5.
  • the motorcycle 1 to which the intake system 5 is applied the motorcycle 1 having the vehicle body frame 11 of a so-called underbone type is shown as an example.
  • the vehicle body frame 11 is configured by including a steering head pipe 111, a main frame 112 and a pair of left and right rear frames 113.
  • the steering head pipe 111 is formed into a shape of a pipe that is inclined rearward.
  • the main frame 112 is formed into a shape of a rod that extends diagonally downward to a rear side from a rear portion of the steering head pipe 111.
  • the pair of left and right rear frames 113 are each formed into a shape of a rod that extends diagonally upward to the rear side from a rear portion of the main frame 112, and separate from each other with a predetermined distance in a lateral direction therebetween.
  • the steering head pipe 111, the main frame 112 and the rear frames 113 are respectively formed from an iron material, an aluminum alloy or the like, and are integrally joined to one another by welding or the like.
  • the steering system 12 includes a front wheel 121, a steering shaft 122, a pair of left and right front forks 123 and a handle unit 124.
  • the steering shaft 122 is rotatably supported at the steering head pipe 111 of the vehicle body frame 11.
  • Upper end portions of the pair of left and right front forks 123 are coupled to the steering shaft 122.
  • Lower end portions of the pair of left and right front forks 123 rotatably support the front wheel 121.
  • a front fender 151 with which an upper portion of the front wheel 121 is covered, and a brake rim 125 of the front wheel 121 are mounted to the pair of left and right front forks 123.
  • the handle unit 124 is provided at an upper end portion of the steering shaft 122, and is rotatably supported by the steering head pipe 111.
  • the handle unit 124 has a handle cover 127, and left and right handle grips 126.
  • the handle grips 126 are provided to protrude to the left and the right from the handle cover 127.
  • a meter unit (not illustrated) is provided at an upper portion of the handle cover 127.
  • the meter unit is provided with measuring instruments such as a speed meter.
  • a headlight 174 is provided at a front portion of the handle cover 127.
  • the handle cover 127 is provided with switches and the like for manipulating lights.
  • the engine unit 13 (internal combustion engine) is fixed to a lower side of the main frame 112.
  • the engine unit 13 includes a cylinder assembly 131, a crankcase assembly 132 and a clutch 133.
  • the cylinder assembly 131 includes a cylinder block, a cylinder head, and a cylinder head cover.
  • a combustion chamber is formed, and a piston is placed to be able to reciprocate.
  • the cylinder head is provided at a front side of the cylinder block.
  • an intake port 134 and an exhaust port 135 which allow the combustion chamber and an outside of the cylinder block to communicate with each other are formed.
  • the cylinder head cover is a member to be a lid of the cylinder head, and is placed at a front side of the cylinder head.
  • a crank chamber is formed at a front side, and a mission chamber is formed at a rear side.
  • a crankshaft is rotatably placed.
  • a countershaft and a driven shaft are rotatably placed, and a transmission is provided.
  • an end portion of the driven shaft is protruded.
  • a drive chain sprocket is provided at an outside of a left side of the crankcase assembly 132.
  • the drive chain sprocket is covered with a sprocket cover.
  • the clutch 133 is placed at a right side of the crankcase assembly 132.
  • a magneto that is a generator, and a starter that starts the engine unit 13 are provided at a left side of the crankcase assembly 132, at a front side of the drive chain sprocket.
  • the rear wheel suspension system 14 is configured by including a rear wheel 141, and a pair of left and right swing shafts 142.
  • the rear wheel 141 is integrally provided with a driven chain sprocket (hidden and invisible in the drawings). Front end portions of the pair of left and right swing shafts 142 are connected to a rear end portion of the main frame 112 or in a vicinity thereof to be swingable in a vertical direction. At rear end portions of the swing shafts 142, the rear wheel 141 is rotatably supported. A drive chain is wound around the drive chain sprocket of the engine unit 13 and the driven chain sprocket of the rear wheel 141, so that power from the engine unit 13 is transmitted to the rear wheel 14 by the drive chain. A chain case 143 is mounted to one of the pair of swing shafts 142, and the driven chain sprocket of the rear wheel 141 and the drive chain are housed in the chain case 143.
  • a shock absorber 144 is provided between each of the pair of left and right swing shafts 142 and each of the pair of left and right rear frames 113.
  • a rear fender 152 is provided above the rear wheel 14.
  • a seat 153 on which the driver is seated is provided above the rear frame 113.
  • a side cover 154 is fitted to a lower side of the seat 153.
  • a fuel tank and a housing box are provided under the seat 153 (both of them are not illustrated).
  • a front cover 155 is fitted to front sides of the steering head pipe 111 and an upper portion of the front fork 123, and a leg shield 156 is fitted to rear sides thereof.
  • the front cover 155 and the leg shield 156 have predetermined widths in the lateral direction to protect a lower half body of the driver who is seated on the seat 153.
  • the side cover 154, the front cover 155 and the leg shield 156 are members which are formed from, for example, a synthetic resin material, and configure the design of an external appearance of the motorcycle 1. Further, a front end of an exhaust pipe 172 is connected to the exhaust port 135 of the cylinder assembly 131 of the engine unit 13, and a silencer 173 is mounted to a rear end of the exhaust pipe 172.
  • the intake system 5 is provided at a diagonally upper side in front of the cylinder assembly 131 of the engine unit 13.
  • the intake system 5 is fixed to a lower side of the main frame 112.
  • the intake system 5 takes in air for combustion for the engine unit 13 (internal combustion engine) from an outside, and filters out impurities (dust and the like) to clean the air. Subsequently, the intake system 5 supplies the cleaned air to the engine unit 13.
  • the intake system 5 has a casing 50, an intake port 532 from which air is taken into the casing 50 from the outside, and a funnel 55 from which the cleaned air is supplied to the engine unit 13 (internal combustion engine) from the casing 50.
  • the intake port 532 is located at an upper side of the intake system 5, and is opened toward a rear side.
  • the funnel 55 is connected to the intake port 134 of the cylinder assembly 131 of the engine unit 13 to be able to supply air thereto. Further, as shown in Fig. 3 , a throttle body 171 that mixes a fuel into the air for combustion is provided between the funnel 55 of the intake system 5 and the intake port 134.
  • Fig. 4 is an exploded perspective view schematically showing the configuration of the intake system 5, and is a view seen from a diagonally front side.
  • Fig. 5 is an exploded perspective view schematically showing the configuration of the intake system 5, and is a view seen from a diagonally rear side.
  • Fig. 6 is a sectional view schematically showing an internal structure of the intake system 5, and is a view of the intake system 5 cut at a substantially horizontal plane and seen from above.
  • the intake system 5 has the casing 50 constituted of a main body 51 and a lid member 52, a partition member 53, a filter element 54, and the funnel 55.
  • the partition member 53 and the lid member 52 are attachably and detachably mounted to the main body 51 of the casing 50.
  • the filter element 54 is fitted to the partition member 53.
  • the casing 50 is constituted of the main body 51 and the lid member 52, and a space is formed in an inside.
  • the main body 51 of the casing 50 is opened at a side (front side in the present embodiment) opposed to the partition member 53 and the lid member 52, and has a box-shaped configuration in which a cavity is formed in an inside thereof, as a whole.
  • the space in the inside of the main body 51 forms a clean side chamber 571.
  • the main body 51 is provided with the funnel 55 which allows the clean side chamber 571 and the outside to communicate with each other so that air can flow therebetween.
  • an engaging groove 512 is formed at a front end (end portion at a side of the partition member 53) of a side wall portion 511 of the main body 51.
  • the engaging groove 512 is a groove in which a third engaging portion 536 (which will be described later) of the partition member 53 can be engaged.
  • a concave portion which is recessed toward a lower side is sometimes formed to avoid interference with the main frame 112 of the vehicle body frame 11.
  • the concrete shape of the main body 51 is not especially limited.
  • the lid member 52 of the casing 50 has a configuration of a shallow box shape (in other words, a tray shape) that opens toward a side of the partition member 53 and the main body 51 (rear side in the present embodiment) as a whole.
  • a space in an inside of the lid member 52 forms a dirty side chamber 561, and an introduction channel 562 that introduces air into the dirty side chamber 561 (which will be described later).
  • the lid member 52 has a front wall portion 521, a side wall portion 522, an intake portion 523, and a bulkhead portion 58.
  • the front wall portion 521 is formed into a plate shape, and separates from the partition wall 531 of the partition member 53 with a predetermined distance therebetween.
  • the side wall portion 522 is formed into a shape of a band plate (in other words, a shape of a screen) raised toward the side of the partition member 53 from an outer peripheral edge of the front wall portion 521.
  • the intake portion 523 is a portion that guides air, which is taken in through the intake port 532 from the outside, to the introduction channel 562.
  • the intake portion 523 further bulges toward the outer side from the outer peripheral edge of the front wall portion 521.
  • the intake portion 523 bulges toward the upper side from the top surface of the front wall portion 521 as shown in Figs. 3 and 4 .
  • the side wall portion 522 is formed along an outer peripheral edge of the intake portion 523. In this manner, the intake portion 523 opens toward the side (rear side) of the partition member 53 and the side (lower side) of the front wall portion 521, and the other portions (both left and right sides and an upper side) are surrounded by the side wall portion 522.
  • the bulkhead portion 58 provides partition between the dirty side chamber 561 and the introduction channel 562.
  • the bulkhead portion 58 is formed into a wall shape (in other words, a screen shape) that is raised toward the side of the partition member 53 from the front wall portion 521.
  • One end (initial end) in the extending direction of the bulkhead portion 58 is integrally connected to the side wall portion 522 in the vicinity of a root of the intake portion 523 (boundary of the intake portion 523 and the front wall portion 521).
  • the bulkhead portion 58 extends along a predetermined part of the side wall portion 522 with a predetermined space therebetween from a vicinity of the root of the intake portion 523.
  • the other end (terminal end) in the extending direction of the bulkhead portion 58 is not connected to the side wall portion 522, and is separated from the side wall portion 522 with a predetermined distance from the side wall portion 522.
  • a notch 581 is formed in an intermediate portion in the extending direction of the bulkhead portion 58. The notch 581 opens toward the side of the partition member 53. Note that the details of a configuration of the bulkhead portion 58 will be described later.
  • the engaging groove 529 is a groove in which a second engaging portion 535 (which will be described later) of the partition member 53 can be engaged.
  • the front wall portion 521 and the bulkhead portion 58 of the lid member 52 are integrally formed.
  • the whole of the lid member 52 is integrally formed from a resin material, a metal material or the like. If the lid member 52 has a configuration formed from a resin material, a configuration formed integrally by injection molding or the like can be applied. Further, if the lid member 52 has a configuration formed from a metal material, a configuration formed integrally by casting, a die cast method, or the like can be applied.
  • the partition member 53 is a member that partitions the space in the inside of the casing 50 into a dirty side 56 (upstream side) and a clean side 57 (downstream side).
  • the partition member 53 has the partition wall 531 that is formed into a plate shape.
  • the partition wall 531 is formed into such a size and a shape that an opening (front end portion) of the main body 51 and an opening (rear end portion) of the lid member 52 can be covered with the partition wall 531 without a gap.
  • the intake port 532, an element fitting portion 533, a first engaging portion 534, a second engaging portion 535 and a third engaging portion 536 are formed in the partition wall 531 of the partition member 53.
  • the intake port 532 has a cylindrical configuration that penetrates through the partition wall 531 in a thickness direction (forward and backward direction) of the partition wall 531 and allows air to pass through.
  • the intake port 532 is formed at a position which is at an outer side of an outer peripheral edge of the partition wall 531 and corresponds to the intake portion 523 of the lid member 52.
  • the intake port 532 is provided at a top side of an upper side of the partition wall 531.
  • the element fitting portion 533 is a through-hole that penetrates through the partition wall 531 in the thickness direction, and has a configuration in which air can flow. As shown in Figs. 4 to 6 , the element fitting portion 533 is formed in a portion to be an inner peripheral surface of the dirty side chamber 561, in a state in which the lid member 52 is mounted to the partition member 53 (in particular, see Fig. 6 ).
  • the filter element 54 is fitted to the element fitting portion 533.
  • the filter element 54 is a member that removes impurities (dust and the like) in air by filtering the air which passes through it. Note that as the filter element 54, various known filter elements are applied. Accordingly, the description of the filter element 54 will be omitted. Further, a size and a shape of the element fitting portion 533 are properly set, and are not especially limited.
  • the first engaging portion 534 is a portion which engages with a rear end (end portion in the protruding direction from the front wall portion 521) of the bulkhead portion 58 of the lid member 52, and is formed in a position and a range corresponding to the rear end of the bulkhead portion 58 of the lid member 52.
  • the first engaging portion 534 is configured by two rib shapes that protrude toward the side of the lid member 52.
  • the rear end of the bulkhead portion 58 of the lid member 52 can be fitted in between the two ribs as the first engaging portion 534.
  • the second engaging portion 535 has a configuration in a rib shape (in other words, a screen shape) raised toward the side (front side) of the lid member 52.
  • the third engaging portion 536 has a configuration in a rib shape that is raised toward the side (rear side) of the main body 51.
  • the second engaging portion 535 and the third engaging portion 536 are both formed along an outer peripheral edge of the partition wall 531 to surround the partition wall 531.
  • the second engaging portion 535 is formed to surround the intake port 532 along the outer peripheral edge of the intake port 532.
  • the third engaging portion 536 is formed to pass an inner side (vicinity of a boundary of the intake port 532 and the partition wall 531) of the intake port 532.
  • the second engaging portion 535 can be fitted into the engaging groove 529 which is formed in the side wall portion 522 of the lid member 52.
  • the third engaging portion 536 can be fitted into the engaging groove 512 which is formed in the side wall portion 511 of the main body 51.
  • the mounting configuration of the intake system 5 is as follows.
  • the filter element 54 is fitted to the element fitting portion 533 of the partition member 53.
  • the partition member 53 to which the filter element 54 is fitted is mounted to the opening (front side) of the main body 51 portion, and the lid member 52 is further mounted. Note that the partition member 53 and the lid member 52 are attachably and detachably mounted to the main body 51 with screws or the like.
  • the second engaging portion 535 of the partition member 53 is fitted into the engaging groove 529 of the side wall portion 522 of the lid member 52.
  • the third engaging portion 536 of the partition member 53 is fitted into the engaging groove 512 of the side wall portion 511 of the main body 51.
  • the rear end of the bulkhead portion 58 of the lid member 52 is fitted in between the two ribs as the first engaging portion 534 of the partition member 53.
  • the front end of the intake port 532 of the partition member 53 and the rear end of the intake portion 523 of the lid member 52 are coupled to each other. Therefore, the front end side of the intake port 532 of the partition member 53 is covered with the intake portion 523 of the lid member 52. Meanwhile, the intake port 532 of the partition member 53 protrudes to an outer side from the outer peripheral surface of the side wall portion 511 of the main body 51, and the rear end side is exposed without being covered with the main body 51. In this manner, the intake port 532 which opens toward the side (rear side) of the main body 51 is formed in the intake system 5.
  • a space is formed in the inside of the casing 50 constituted of the main body 51 and the lid member 52.
  • the space which is formed in the inside of the casing 50 is partitioned into the dirty side 56 (upstream side) which is the side of the lid member 52, and the clean side 57 (downstream side) which is the side of the main body 51 by the partition wall 531 of the partition member 53.
  • the dirty side chamber 561 and the introduction channel 562 which introduces air to the dirty side chamber 561 from the intake portion 523 are formed. More specifically, the introduction channel 562 is formed by a predetermined part (portion of the left side surface in the present embodiment) of the side wall portion 522 of the lid member 52, and the bulkhead portion 58 which is formed to be along the predetermined part of the side wall portion 522 with a predetermined distance therefrom. Furthermore, the dirty side chamber 561 is formed by the portions other than the aforementioned predetermined part of the side wall portion 522 and the bulkhead portion 58. In this manner, the bulkhead portion 58 partitions the dirty side 56 of the casing 50 into the dirty side chamber 561 and the introduction channel 562.
  • the element fitting portion 533 which is formed in the partition wall 531 of the partition member 53 and the filter element 54 are located at a rear surface of the dirty side chamber 561.
  • a communication hole 525 is formed in the intermediate portion in the extending direction of the bulkhead portion 58.
  • the communication hole 525 is a through-hole that is formed by the notch 581 formed in the bulkhead portion 58, and the first engaging portion 534 formed in the partition wall 531.
  • the communication hole 525 allows the introduction channel 562 and the dirty side chamber 561 to communicate with each other so that air can flow therebetween.
  • the clean side chamber 571 is formed.
  • the outside of the intake system 5 and the dirty side chamber 561 communicate with each other so that air can flow therebetween, via the intake port 532 of the partition member 53, the intake portion 523 of the lid member 52 and the introduction channel 562. Further, the introduction channel 562 and the dirty side chamber 561 also communicate with each other via the communication hole 525 so that air can flow.
  • the dirty side chamber 561 and the clean side chamber 571 communicate with each other through the filter element 54 fitted to the element fitting portion 533 of the partition member 53 so that air can flow therebetween.
  • the clean side chamber 571 and the intake port 134 of the engine unit 13 communicate with each other through the funnel 55 so that air can flow therebetween.
  • the intake system 5 takes in air for combustion of the engine unit 13 (internal combustion engine) from the intake port 532 of the partition member 53, and introduces the air into the dirty side chamber 561 via the intake portion 523 of the lid member 52 and the introduction channel 562. Subsequently, the intake system 5 filters and cleans the air introduced into the dirty side chamber 561 by the filter element 54, and supplies the air to the intake port 134 of the engine unit 13 via the clean side chamber 571 and the funnel 55.
  • the engine unit 13 internal combustion engine
  • Fig. 7 is a sectional view schematically showing the configurations of the introduction channel 562 and the dirty side chamber 561, and is a view seen from the front side. Further, the arrow in Fig. 7 schematically shows a flow of air.
  • Fig. 8 is a sectional view of the intake portion 523 and the introduction channel 562 seen from above, and is a view showing a state of the intake portion 523 and the intake port 532 cut at a substantially horizontal plane.
  • Fig. 9 is a sectional view schematically showing configurations of the introduction channel 562 and the dirty side chamber 561, and is a view cut in the extending direction of the introduction channel 562.
  • the intake port 532 of the partition member 53 and the intake portion 523 of the lid member 52 protrude to the upper side from the top surface of the side wall portion 522 of the lid member 52.
  • the intake port 532 and the intake portion 523 are formed at a position inward to the center instead of the end portion in the lateral direction, seen from the side of the main body 51.
  • the intake port 532 and the intake portion 523 are formed at the left end of the portion which is the top surface of the side wall portion 522 and is formed into a substantially flat surface. Namely, the intake port 532 and the intake portion 523 are formed near to the center in the lateral direction from the portion where the side wall portion 522 is formed into a circular arc. Note that the configuration in which the intake port 532 and the intake portion 523 are formed at the portion of the circular arc of the side wall portion 522 may be adopted. Namely, the intake port 532 and the intake portion 523 can be configured to be formed at the position displaced to the center from one end in the lateral direction of the side wall portion 522.
  • An initial end (upper end) of the bulkhead portion 58 is integrally connected to the side wall portion 522 near the center in the lateral direction in the vicinity of the root of the intake portion 523 (vicinity of the boundary of the intake portion 523 and the front wall portion 521).
  • the side wall portion 522 extends from the initial end to a portion (portion formed into a circular arc) at an upper left corner of the front wall portion 521, and a portion (predetermined portion of the side wall portion 522) formed at a left side, of the side wall portion 522, to be along with a predetermined distance being left.
  • a terminal end (lower end) of the bulkhead portion 58 is located in the vicinity of a lower side of the front wall portion 521.
  • the terminal end of the bulkhead portion 58 separates from the side wall portion 522 with a predetermined distance therefrom.
  • a region between the predetermined part of the side wall portion 522 and the bulkhead portion 58 forms the introduction channel 562, and a region surrounded by the portions other than the predetermined part of the side wall portion 522 and the bulkhead portion 58 forms the dirty side chamber 561.
  • the introduction channel 562 has the intake portion 523 as the initial point, extends along the predetermined part of the side wall portion 522, and has the vicinity of the lower left of the inside of the lid member 52 as the terminal point.
  • the introduction channel 562 allows the intake portion 523 and the dirty side chamber 561 to communicate with each other so that air can flow therebetween.
  • the left end portion of the lower side of the lid member 52 bulges downward as compared with the other portions.
  • the introduction channel 562 can be made long as compared with the configuration in which the lower side of the lid member 52 is formed to be substantially horizontal.
  • a first curved portion 582, a linear portion 583 that is located at a terminal end side from the first curved portion 582, and a second curved portion 584 that is located at a terminal end side from the linear portion 583 are formed.
  • the first curved portion 582 is a portion that is curved diagonally downward to an outer side (left side) in the lateral direction, seen from the initial end side.
  • the linear portion 583 is a portion with a center line thereof formed to be a straight line.
  • the second curved portion 584 is a portion that is curved toward a lower side, seen from the initial end side.
  • the intake portion 523 is formed at the position inward to the center from the left end. Therefore, the bulkhead portion 58 first extends substantially downward from the initial end, and is immediately curved toward the outer side (diagonally downward to the left) in the lateral direction to be along the side wall portion 522 which is formed at the upper left corner portion.
  • the portion is the first curved portion 582.
  • the first curved portion 582 is formed in the direction (lower side) in which the intake portion 523 opens.
  • the air that passes through the intake portion 523 is to flow toward the direction in which the intake portion 523 opens, and therefore, the first curved portion 582 is located at the downstream side in the flowing direction in the case of air flowing in a straight line, seen from the intake portion 523.
  • the bulkhead portion 58 linearly extends diagonally downward to the left from a terminal end side of the first curved portion 582.
  • the portion is the linear portion 583.
  • the communication hole 525 is formed in the linear portion 583.
  • the linear portion 583 is also located at the downstream side in the flowing direction in the case of air flowing in a straight line, seen from the intake portion 523, similarly to the first curved portion 582.
  • the first curved portion 582 and the communication hole 525 are located in an inside of the opening of the intake portion 523.
  • the bulkhead portion 58 is curved toward the lower side from the terminal end side of the linear portion 583.
  • the portion is the second curved portion 584. Thereafter, the bulkhead portion 58 extends toward a substantially lower side to reach the terminal end.
  • a channel that passes through the communication hole 525 from the intake portion 523 to reach the dirty side chamber 561, and a channel that passes through the introduction channel 562 from the intake portion 523 (without passing through the communication hole 525), and reaches the dirty side chamber 561 from the terminal end of the introduction channel 562 are formed in parallel.
  • a distance to the dirty side chamber 561 from the intake portion 523 is shorter in the channel that passes through the communication hole 525 to reach the dirty side chamber 561 than in the channel which reaches the dirty side chamber 561 from the terminal end of the introduction channel 562.
  • the communication hole 525 is formed in a position in a range of 1/3 to 2/3 from one end (the initial end or the terminal end) in the extending direction of the bulkhead portion 58.
  • the communication hole 525 is formed in a substantially center portion in a height direction of the bulkhead portion 58 of the lid member 52 (direction perpendicular to at least one of the inner peripheral surface of the front wall portion 521 and the surface of the partition wall 531).
  • the notch 581 which opens toward the rear side is formed.
  • the inner peripheral surface of the notch 581 of the bulkhead portion 58 and the end surfaces in the height direction of the two ribs as the first engaging portion 534 become the inner peripheral surface of the communication hole 525.
  • the notch 581 does not reach the inner peripheral surface of the front wall portion 521, and a bottom surface of the notch 581 is located at a position separated from the front wall portion 521 in the height direction.
  • the two ribs as the first engaging portion 534 protrudes from the surface of the partition wall 531, the end surfaces in the height direction of the two ribs are separated from the surface of the partition wall 531. Therefore, the communication hole 525 is formed midway in the height direction of the bulkhead portion 58 of the lid member 52.
  • the communication hole 525 is formed in the substantially center portion in the height direction of the bulkhead portion 58 of the lid member 52.
  • the air for combustion for the internal combustion engine is firstly introduced into the introduction channel 562 through the intake port 532 which is formed in the partition member 53 and the intake portion 523 which is formed in the lid member 52.
  • the intake portion 523 of the lid member 52 opens toward the lower side. Therefore, the air which flows into the introduction channel 562 through the intake portion 523 of the lid member 52 flows toward the lower side first.
  • the communication hole 525 is formed in a position which is at a downstream side of the intake portion 523, and is directly visible from the intake portion 523. Furthermore, the first curved portion 582 is formed at the upstream side of the communication hole 525 (linear portion 583), downstream of the intake portion 523.
  • part of the air which flows toward the lower side directly flows into the communication hole 525, or flows into the communication hole 525 by being guided by the first curved portion 582. Subsequently, the air that passes through the communication hole 525 flows into the dirty side chamber 561. Meanwhile, the remainder of the air which flows toward the lower side does not flow into the communication hole 525, but flows further downward along the introduction channel 562, and flows into the dirty side chamber 561 from the terminal end of the introduction channel 562.
  • the communication hole 525 which allows the introduction channel 562 and the dirty side chamber 561 to communicate with each other is formed. Therefore, pressure of the air which is introduced into the inside of the intake system 5 can be released through the communication hole 525. Accordingly, occurrence of resonance sound can be prevented or suppressed in the introduction channel 562, and the noise of the intake system 5 can be reduced.
  • the communication hole 525 is formed at a downstream side (position directly visible from the intake portion 523) in the flowing direction of the air introduced into the introduction channel 562 from the intake portion 523. With the configuration like this, if the velocity of the air which is introduced into the introduction channel 562 becomes higher, the amount of the air which flows into the communication hole 525 becomes larger. Therefore, in the case of requiring high power output (in the case of requiring a large amount of air), response of the engine can be enhanced (or reduction can be prevented or suppressed).
  • the effect of reduction of the noise by the introduction channel 562 can be enhanced.
  • the first curved portion 582 is formed at a downstream side of the intake portion 523
  • the linear portion 583 is formed at a downstream side of the first curved portion 582
  • the second curved portion 584 is formed downstream of the linear portion 583.
  • the air which flows in the introduction channel 562 can be smoothly guided to the dirty side chamber 561 by the first curved portion 582 and the second curved portion 584. Accordingly, noise can be reduced, and the flow resistance of air can be reduced.
  • the communication hole 525 is formed in the linear portion 583 which is located downstream of the first curved portion 582. With the configuration like this, the function and the effect of guiding air by the first curved portion 582 are not reduced.
  • the configuration is such that the direction of the flow of the air is changed by the first curved portion 582, and therefore, if the configuration is such that the communication hole 525 is formed in the first curved portion 582, an area of the region which is used for guidance of air in the first curved portion 582 is decreased. Accordingly, the effect of guiding the air by the first curved portion 582 is reduced. In contrast with this, if the configuration is such that the linear portion 583 is formed at the downstream side of the first curved portion 582, and the communication hole 525 is formed in the linear portion 583, the area of the region which is used for guidance of the air in the first curved portion 582 is not decreased. Accordingly, with the configuration like this, the effect of guiding air can be kept.
  • the communication hole 525 is formed substantially in the center in the height direction of the bulkhead portion 58.
  • the amount of the air which flows in the introduction channel 562 becomes maximum substantially in the center in the height direction of the bulkhead portion 58. Therefore, if the configuration is such that the communication hole 525 is formed in this position, the amount of the air passing through the communication hole 525 can be made large. Consequently, according to the configuration like this, the effect of prevention or suppression of occurrence of the resonance sound in the introduction channel 562, and the effect of enhancing the response of the engine when high output power is required can be enhanced.
  • the bulkhead portion 58 has a configuration in the wall shape which protrudes toward the side of the partition member 53 from the front lid portion of the lid member 52. According to the configuration like this, the front wall portion 521 and the bulkhead portion 58 can be integrally formed by injection molding or the like. Accordingly, formation of the bulkhead portion 58 is facilitated. Further, since the lid member 52 is easily formed integrally as a whole, the number of components can be reduced, and the number of assembly process steps can be reduced (or increase can be prevented or suppressed).
  • the configuration is such that the notch 581 is formed in the bulkhead portion 58, and the communication hole 525 is formed by the notch 581, formation of the communication hole 525 becomes easier as compared with the configuration in which a through-hole is formed in the bulkhead portion 58.
  • the front wall portion 521 and the bulkhead portion 58 are integrally formed, and the notch 581 can be formed in the bulkhead portion 58. Accordingly, reduction of manufacture cost and the like can be realized.
  • Fig. 10 is a graph showing the effect of reduction of the noise of the intake system 5 according to the example.
  • An axis of abscissa represents the position (position in the extending direction of the bulkhead portion 58) where the communication hole 525 is formed.
  • An axis of ordinates represents the degree of reduction of the noise of the intake system 5 according to the example in a logarithmic scale, in comparison with the intake system (comparative example) having the partition wall portion in which the communication hole is not formed.
  • the degree of reduction of the noise of the intake system 5 becomes abruptly large in the position in the range of 1/3 to 2/3 from one end (the initial end or the terminal end) in the extending direction of the bulkhead portion 58.
  • the degree of reduction of noise becomes the largest in the center in the extending direction of the bulkhead portion 58.
  • the communication hole 525 is preferably in the position in the range of 1/3 to 2/3 from one end (the initial end or the terminal end) in the extending direction of the bulkhead portion 58. Further, the communication hole 525 is preferably in the position at the center in the extending direction of the bulkhead portion 58 or in the vicinity thereof.
  • the configuration of the intake system being applied to an underbone type motorcycle is shown, but the kind of the motorcycle to which the intake system is applied is not limited.
  • the intake system 5 of the present invention can be applied to various motorcycles (including a motor-assisted bicycle) such as a street motorcycle, an off-road motorcycle, and a scooter type motorcycle. Further, the intake system can be also applied to tricycles, four-wheel cars and the like for traveling rough terrains, besides motorcycles.
  • the present invention is an effective art for the intake system for an internal combustion engine. According to the present invention, the intake pressure is released, and the resonance sound can be reduced. Accordingly, noise can be reduced.
  • the intake pressure can be released by the communication hole which allows the introduction channel and the dirty side chamber to communicate with each other halfway in the introduction channel. Accordingly, the resonance sound can be reduced, and the noise that is generated by the intake system can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP13162256.5A 2012-04-05 2013-04-04 Intake system for internal combustion engine Active EP2647822B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012086781A JP5987425B2 (ja) 2012-04-05 2012-04-05 内燃機関の吸気装置

Publications (3)

Publication Number Publication Date
EP2647822A1 EP2647822A1 (en) 2013-10-09
EP2647822B1 EP2647822B1 (en) 2015-03-04
EP2647822B2 true EP2647822B2 (en) 2019-04-03

Family

ID=48047886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13162256.5A Active EP2647822B2 (en) 2012-04-05 2013-04-04 Intake system for internal combustion engine

Country Status (4)

Country Link
EP (1) EP2647822B2 (zh)
JP (1) JP5987425B2 (zh)
CN (1) CN103362701B (zh)
ES (1) ES2537420T5 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6790809B2 (ja) * 2016-12-26 2020-11-25 トヨタ紡織株式会社 内燃機関のエアクリーナ
JP6625577B2 (ja) * 2017-02-15 2019-12-25 本田技研工業株式会社 エアクリーナー装置
JP2020084816A (ja) * 2018-11-19 2020-06-04 タイガースポリマー株式会社 エアクリーナ
CN110711300B (zh) * 2019-09-09 2023-07-18 天津怡和嘉业医疗科技有限公司 减噪盒和通气治疗设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005069220A (ja) † 2003-08-06 2005-03-17 Honda Motor Co Ltd 自動二輪車
JP2005120915A (ja) † 2003-10-16 2005-05-12 Honda Motor Co Ltd 内燃機関のエアクリーナ装置
EP1541856A1 (en) † 2003-12-11 2005-06-15 Mann + Hummel GmbH Sound adsorber suitable for air-flow conduits
DE102011005853A1 (de) † 2010-03-23 2011-09-29 Honda Motor Co., Ltd. Luftfiltereinrichtung

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JPS59121466U (ja) 1983-02-03 1984-08-16 富士重工業株式会社 エアクリ−ナ
DE3429633A1 (de) * 1984-08-11 1986-02-20 Ing. Walter Hengst GmbH & Co KG, 4400 Münster Schalldaempfendes luftansaugfilter fuer eine brennkraftmaschine
DE3606630A1 (de) * 1985-02-28 1986-08-28 Roth Technik GmbH, 7560 Gaggenau Luftfilter
JPH09236057A (ja) * 1996-02-27 1997-09-09 Suzuki Motor Corp エアクリーナ装置
TW363565U (en) * 1998-07-14 1999-07-01 Kwang Yang Motor Co Muffler structure for the air filter of motorcycle
JP4636369B2 (ja) * 2005-02-15 2011-02-23 いすゞ自動車株式会社 エアクリーナ装置
US7484491B2 (en) * 2007-07-03 2009-02-03 Visteon Global Technologies, Inc. Air induction system with resonator bypass valve
CN201863942U (zh) * 2010-09-14 2011-06-15 洛阳北方易初摩托车有限公司 摩托车用空气滤清器的安装结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005069220A (ja) † 2003-08-06 2005-03-17 Honda Motor Co Ltd 自動二輪車
JP2005120915A (ja) † 2003-10-16 2005-05-12 Honda Motor Co Ltd 内燃機関のエアクリーナ装置
EP1541856A1 (en) † 2003-12-11 2005-06-15 Mann + Hummel GmbH Sound adsorber suitable for air-flow conduits
DE102011005853A1 (de) † 2010-03-23 2011-09-29 Honda Motor Co., Ltd. Luftfiltereinrichtung

Also Published As

Publication number Publication date
EP2647822B1 (en) 2015-03-04
JP2013217235A (ja) 2013-10-24
CN103362701A (zh) 2013-10-23
JP5987425B2 (ja) 2016-09-07
CN103362701B (zh) 2016-08-17
ES2537420T5 (es) 2019-08-08
EP2647822A1 (en) 2013-10-09
ES2537420T3 (es) 2015-06-08

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