EP0500105B1 - Motocyclette avec dispositif d'échappement - Google Patents

Motocyclette avec dispositif d'échappement Download PDF

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Publication number
EP0500105B1
EP0500105B1 EP92102854A EP92102854A EP0500105B1 EP 0500105 B1 EP0500105 B1 EP 0500105B1 EP 92102854 A EP92102854 A EP 92102854A EP 92102854 A EP92102854 A EP 92102854A EP 0500105 B1 EP0500105 B1 EP 0500105B1
Authority
EP
European Patent Office
Prior art keywords
oxygen sensor
exhaust
exhaust chamber
motorcycle
chamber
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.)
Expired - Lifetime
Application number
EP92102854A
Other languages
German (de)
English (en)
Other versions
EP0500105A1 (fr
Inventor
Ryoichi c/o Yamaha Hatsudoki K.K. Gekka
Masaki c/o Yamaha Hatsudoki K.K. Takegami
Tomokazu c/o Yamaha Hatsudoki K.K. Ito
Akira c/o Yamaha Hatsudoki K.K. Yokoo
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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
Priority claimed from JP3050412A external-priority patent/JP2966554B2/ja
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of EP0500105A1 publication Critical patent/EP0500105A1/fr
Application granted granted Critical
Publication of EP0500105B1 publication Critical patent/EP0500105B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles

Definitions

  • the present invention relates to a motorcycle comprising an engine, particularly multiple cylinder engine, an exhaust gas arrangement and an exhaust pipe assembly comprising a plurality of front exhaust pipes extending from the engine to an exhaust chamber and a rear exhaust pipe extending from said exhaust chamber to discharge exhaust gas therefrom, and an oxygen sensor for detecting the oxygen contents of the exhaust gas, said oxygen sensor extending upwardly from the exhaust chamber.
  • the oxygen sensor is adapted to detect the concentration of oxygen in an exhaust gas within the exhaust pipe. According to the detection signal from the sensor, the period of time through which the fuel injection valve is maintained in an open position is determined, namely the amount of the fuel to be injected is determined, so as to make the air fuel ratio (A/F) as close to a theoretical value as possible.
  • the oxygen sensor is mounted on the exhaust pipe located beneath the engine.
  • the place at which the oxygen concentration of an exhaust gas is to be detected is made as close to the engine as possible so as to improve the accuracy in amount of the fuel to be injected.
  • the oxygen sensor When the oxygen sensor is mounted on an outer surface of the exhaust pipe beneath the engine as described above, the position of the oxygen sensor is close to the road surface on which the motorcycle runs. Therefore, water or mud splashed by the wheels during running is apt to hit on the sensor. There is, thus, a danger of causing damage of the oxygen sensor.
  • the O 2 sensor is mounted to an upper surface of an exhaust pipe located beneath the engine.
  • the O 2 sensor is damaged by flying stones, etc., and is penetrated with rain water, etc.
  • the O 2 sensor will be contacted with the ground when the automobile is slanted and, hence, the banking angle becomes small.
  • JP-A-59099021 shows an oxygen sensor attached to an exhaust chamber at an upper portion thereof.
  • this known exhaust gas arrangement is unsatisfactory as regards cleansing of the exhaust gas.
  • this objective is performed in that a catalyst is disposed in the exhaust chamber and the oxygen sensor is disposed upstream of said catalyst and downstream of the opening ends of the front exhaust pipes opening into the exhaust chamber. Accordingly, the oxygen concentration is detected close to the engine and on the other hand differences in the exhaust concentration of different exhaust pipes are equalised.
  • the oxygen sensor is disposed at an upper portion of the exhaust gas chamber, specifically at an upper case of said chamber made of sheet metal.
  • the oxygen sensor is disposed at a depressed area of the upper case of the exhaust gas chamber, and is disposed obliquely upward.
  • a front exhaust pipe is detachably connected to the exhaust gas chamber while the other front exhaust pipes of a multi cylinder internal combustion engine integrally joined with the exhaust gas chamber which, in turn, is suspendedly secured to a lower bottom portion of the internal combustion engine.
  • a sensor protecting shielding arrangement preferably established by a cowling extending from the bottom frame downwardly to shield the oxygen sensor from the side and from below, while according to a further modification, there is a front plate arrangement with a first protector plate projecting from the exhaust chamber and a second protector plate which prcjects from the frame body or defines a part of the cowling to establish a labyrinth arrangement with the first protector plate to protect the oxygen sensor.
  • a front plate arrangement with a first protector plate projecting from the exhaust chamber and a second protector plate which prcjects from the frame body or defines a part of the cowling to establish a labyrinth arrangement with the first protector plate to protect the oxygen sensor.
  • the motorcycle 1 has a body frame composed of a pair of left and right main frames 3 each of which is in an inverted U-shaped form when viewed from the side and which are connected by a cross pipe, a head bracket 5 connected by a cross pipe, a head bracket 5 connected to an upper surface of an upper portion of each main frame 3, a lamp stay 6 provided in forwardly extended portions of the head brackets 5 for supporting a front lamp 14, a seat rail 7 connected to an upper rear end of each main frame 3, and a seat stay 8 by which the seat rail 7 is connected to a rear arm bracket 3c provided in a rear portion of the rain frame 3.
  • the main frame 3 has a front portion provided with a front bracket 3a to which a front arm 12 is vertically pivotally supported.
  • the front arm 12 is in an h-shaped form when viewed in the plane and has rear end portions pivotally supported by the front bracket 3a and front end portions to which a front wheel bracket 10 is rotatably supported by means of a ball joint (not shown).
  • a front wheel 11 is supported in the lower end of the bracket 10.
  • a lower portion of the front wheel bracket 10 and an upper end of the front bracket 3a are connected with each other by a front cushion 13.
  • the front wheel bracket 10 is leftwardly and rightwardly steerably supported to the head pipe 4 through a steering shaft 9.
  • the shaft 9 is constructed from an upper pipe 9a supported by the head pipe 4 and a lower pipe 9b retractably received in the upper pipe 9a and fixedly secured to an upper portion of the front wheel bracket 10, and is oriented such that the upper the position thereof, the more becomes rearward the position, namely in a rearwardlv inclined state.
  • a rear arm 15 is vertically pivotally supported.
  • the rear arm 15 has a rear end rotatably supporting a rear wheel 16.
  • a front portion of the rear arm 15 is linked with a lower end of the rear arm bracket 3c by a linking mechanism 17.
  • the linking mechanism 17 is connected to a cushion bracket 3d of the rear arm, bracket 3c by a rear cushion 18.
  • An engine unit 19 is suspendedly supported by the main frame 3.
  • a front upper portion of the engine unit 19 is provided with an air cleaner 20 and a glove compartment 21 in this order from the below.
  • a fuel tank 22 behind which a seat 23 is provided.
  • the glove compartment 21, fuel tank 22, etc. are surrounded by a tank cover 22a provided with a lid 22b at a position adjacent to the glove compartment 21.
  • Another lid 21a is provided in the bottom of the glove compartment 21.
  • a radiator 24 Disposed on the rear side of the steering shaft 9 is a radiator 24 which is oriented along the steering shaft 9, namely in a rearwardly inclined state, when viewed from the side.
  • the radiator 24 has a rearwardly protruding curved element 24a on the right end of which a feed water box 24b is secured and on the left end of which an exhaust water box 24c is secured.
  • a pair of left and right wind fans 63 are disposed in the backside of the radiator 24 and are oriented outwardly and toward the left and right, lower corner sides.
  • the engine unit 19 in this embodiment is of a water-cooled, four-cycle, parallel four-cylinder type which is constructed from a cylinder body 26, a cylinder head 27 and a head cover 28 superposed one over the other in a front upper portion of the crankcase 25.
  • An intake manifold 29 is connected to a rear wall of the cylinder head 27.
  • a throttle body 30 is connected such that it is oriented vertically as a whole.
  • the air cleaner 20 is connected to the throttle body 30.
  • Designated as 44a is an air introduction duct and as 31 a fuel injection valve.
  • the cylinder head 27 has a front wall to which four exhaust pipes 46a-46d of the exhaust device 45 are connected.
  • Each of the exhaust pipes 46a-46d extends from a front portion of the crankcase 25 to a lower portion thereof and is connected to a common, exhaust chamber 47 disposed beneath the crankcase 25.
  • the exhaust chamber 47 is of a two-separated type which is composed of upper and lower cases 47a and 47b connected with each other.
  • the upper case 47a has a rear end portion in which an exhaust pipe 47e in integrally formed. To the front end of the exhaust chamber are welded rear ends of the three exhaust pipes 46b-46d except of the left end exhaust pipe 46a.
  • the left end exhaust pipe 46a is inserted into a joint 47c welded to the front end and is fixed there by means of a fixing band 48 wound therearound and fastened by a fixing bolt 48a.
  • the left end exhaust pipe 46a is made detachable so that the exhaust device 45 can be easily mounted to the engine.
  • the front arm 12 of the motorcycle of the present embodiment has an h-shaped form and the width a of the exhaust pipes 46a-46d is greater than the inside width b of the front arm 12. Therefore, the exhaust pipes as such will be interfered by the front arm so that the assembling work will be difficult to perform.
  • the width of the exhaust pipes is smaller than the above-mentioned inside width, so that the assembling is easy to perform.
  • the turned ends of the front exhaust pipes 46a to 46d are joined to the exhaust chamber 47 to which the rear pipe 47f is connected.
  • the rear pipe 47f extends rearwardly and has a rear end connected to a silencer (not shown).
  • the exhaust chamber 47 passes rearwardly beneath an oil pan 61 which constitutes a bottom of the engine 19.
  • the exhaust chamber 47 is made by press forming and is shaped from an upper, inverted bowl-like plate 62 and a lower bowl-like plate 64 which are vertically faced with and bonded to each other in the form of bean-jam-filled wafers with the bonding portion being welded to establish the upper and lower cases 47a, 47b.
  • the exhaust chamber 47 comprises pairs of front and rear partitioning plates 65 welded to the middle portions of the inner surface of the exhaust chamber at the upper and bottom portions thereof, one behind the other in the travelling direction of the motorcycle 1.
  • the partitioning plates 65 sub-divide the exhaust chamber 47 into front and rear chambers 67, 68, the front chamber 67 is in communication with the front exhaust pipes 46a to 46d while the rear chamber 68 is communicated to the rear exhaust pipe 47f.
  • a cylindrical body 69 is provided to extend through the partitioning plates 67, 68 and is supported by welding thereof. Within the cylindrical body 69 the catalyst 52 is secured. A sealing material 66 is disposed between the inside of the cylindrical body 69 and the outersurface of the catalyst 52.
  • the flow of exhaust gas 70 from the engine 90 passes successively through the front exhaust pipes 46a to 46d, the front chamber 67, catalyst 52 and rear chamber 68 of the exhaust chamber 47 and the rear exhaust pipe 47f to be discharged rearwardly from the motorcycle body.
  • the catalyst 52 serves to purify the exhaust gas 70 passing therethrough.
  • a boss 49a is welded to a front right portion of the exhaust chamber 47 and inserted through the wall of same.
  • the oxygen sensor 49 is detachably secured to the boss 49a by screws from the outer surface of the exhaust chamber 47.
  • the oxygen sensor 49 is covered overhead with a side portion of the oil pan 62 and has a detecting portion 49b positioned adjacent to the front chamber 67.
  • the oxygen sensor 52 detects the oxygen concentration of the exhaust gas 70 and the exhaust chamber 47.
  • the detection signal determines the opening time of the fuel injection valve (not shown here) of the engine 19, i.e. the amount of fuel to be injected.
  • the oxygen sensor 49 is located as upstream to the flow of exhaust gas 70 as possible and close to the engine 19.
  • a temperature sensor for detecting the temperature of the exhaust gas 70 is of a thermo couple type and designated with the reference numerals 72.
  • the exhaust gas temperature sensor 72 is detachably mounted to a rear portion of the exhaust chamber 47 and has a detecting portion 72a disposed adjacent to the rear chamber 68.
  • the detecting portion 72a is located downstream and in the vicinity of the catalyst 52 to detect the temperature of the exhaust gas 70 so as to indirectly detect the temperature of the catalyst 52.
  • Feet rests are designated with the reference numeral 73.
  • a pair of cowlings 60 is provided and designed to cover the body frame 3, the engine 19, the exhaust device 45 and the oxygen sensor 49 from left and right sides.
  • Each of the cowlings 60 is supported by the body frame 3, and constitutes part of the body 3.
  • the right cowling 60 has a lower portion which covers the lower side of the oxygen cylinder 49 and, thus, serves to function as a protecting member for the oxygen sensor 49.
  • the oxygen sensor 21 is disposed in a narrow space defined by the oil pan 61 and the cowling 60 and is mounted on the exhaust chamber 47 with the detecting portion 52a being lowered forwardly. Further, the longitudinal direction of the oxygen sensor 49 is oriented along the inside face of the cowling 60 corresponding to the oxygen sensor 49. By this construction, the outer edge of the oxygen sensor 49 is oriented obliquely upwardly to enable easy wiring of the oxygen sensor 49.
  • the oxygen sensor 49 is required to be disposed in the narrow space between the oil pan 61 and the cowling 60, the boss 52a to which the oxygen sensor 49 is fixed by screws is mounted on the portion at which the upper plate 62 and the lower plate 64 are joined bestride both plates 62, 64.
  • a first protector plate 74 formed by press forming is provided on the right side of the outer surface of the exhaust chamber 47 near the front portion of the oxygen sensor 49.
  • the first protector plate 74 covers a front side of the oxygen sensor 49. Accordingly, the first protector plate 74 serves as a protecting member for the oxygen sensor 49.
  • the first protector plate 74 has a base portion welded across the upper and lower plates 621, 64 so that the bonding force between the upper and lower plates 62, 64 (upper case 47a, lower case 47b) is improved.
  • a second protector plate 75 is integrally formed on an inside phase of the cowling 60 and protruded into a space between the oxygen sensor 49 and the first protector plate 74.
  • the second protector plate 75 covers a front side of the oxygen sensor 49 and, thus, serves to function as a protecting member for the oxygen sensor 49.
  • the passage leading to the oxygen sensor 49 from a portion in front of same is in the form of a labyrinth formed by the first and second protector plates 74, 75.
  • the oxygen sensor 49 is mounted on an outer surface of the exhaust chamber 47, the oxygen sensor 49 is located close to the road surface during running of the motorcycle leading water and the like to splash during running and to adhere to the oxygen sensor 49.
  • the oil pan 61 covering the upper side of the oxygen sensor 49, the lower portion of the cowling 60, covering the lower side of the oxygen sensor 49 and the first and second protector plates 74, 75, covering the front side thereof, the above mentioned collision is surely prevented by these parts so that damage of the oxygen sensor 49 can be prevented.
  • the cowling 60 establishes a high rigidity and the second protector plate 75 is mounted on the cowling 60, having a high rigidity, the mounting of the protector plates 62, 64 provides a sufficient strength to further surely prevent the above mentioned collision with water, stones or the like.
  • Figures 5 to 7 show still another embodiment wherein the second protector plate 75 is welded to the body frame 3 having a high rigidity.
  • the further structure and function are the same as in the above described embodiments indicated in Figures 2 to 4 and, therefore, the common parts are allotted with same reference numerals in the drawings and in view of the description references made to the above explanation.
  • the oxygen sensor is disposed on an upper portion of the exhaust chamber, the lower portion of the exhaust chamber can serve to function as a protector for the oxygen sensor and can prevent same from being damaged by flying stones, penetration of rain water etc.
  • a protecting member is provided for covering the lower side and front side of the oxygen sensor, more specifically said protecting member comprising lower parts of the cowling and/or side plate arrangement further protecting the oxygen sensor.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)

Claims (13)

  1. Motocyclette comprenant un moteur (19), en particulier un moteur à plusieurs cylindres ; un dispositif d'échappement et-un ensemble de tubulures d'échappement comprenant une pluralité de tubulures antérieures d'échappement (46a, 46d) s'étendant du moteur (19) vers une chambre d'échappement (47), et une tubulure postérieure d'échappement partant de ladite chambre d'échappement (47) pour évacuer des gaz d'échappement hors de cette dernière ; et un capteur d'oxygène (49) pour détecter les parts d'oxygène contenues dans les gaz d'échappement, ledit capteur d'oxygène (49) s'étendant vers le haut à partir de la chambre d'échappement (47), caractérisée par le fait qu'un catalyseur (52) est logé dans la chambre d'échappement (47), et le capteur d'oxygène (49) est installé en amont dudit catalyseur (52) et en aval des extrémités ouvertes des tubulures antérieures d'échappement (46a, 46d) débouchant dans la chambre d'échappement (47).
  2. Motocyclette selon la revendication 1, caractérisée par le fait que le capteur d'oxygène (49) est disposé dans une région supérieure de la chambre d'échappement (47).
  3. Motocyclette selon les revendications 1 et 2, caractérisée par le fait que la chambre d'échappement (47) est composée de carters supérieur et inférieur (47a, 47b) fabriqués en tôle métallique ; et par le fait que le capteur d'oxygène (49) est fixé au carter supérieur (47a) de la chambre d'échappement (47).
  4. Motocyclette selon la revendication 3, caractérisée par le fait que le capteur d'oxygène (49) est installé dans une région frontale située en partie haute du carter supérieur (47a) de la chambre d'échappement (47), et est orienté à l'oblique vers le haut.
  5. Motocyclette munie d'un moteur à quatre cylindres, comprenant quatre tubulures antérieures d'échappement (46a-46d) se rattachant à la chambre d'échappement (47), selon au moins l'une des revendications précédentes 1 à 4, caractérisée par le fait qu'une tubulure antérieure d'échappement (46a), occupant une position latérale, est reliée de manière libérable à la chambre d'échappement (47), tandis que les autres tubulures antérieures d'échappement (46b-46d) forment un seul tenant avec la chambre d'échappement (42) fixée, en suspension, à la région inférieure du moteur (19).
  6. Motocyclette selon au moins l'une des revendications 1 à 5, caractérisée par le fait que le capteur d'oxygène (49) est agencé avec décalage latéral par rapport au catalyseur (52).
  7. Motocyclette selon au moins l'une des revendications précédentes 1 à 6, caractérisée par le fait que le capteur d'oxygène (49) est installé dans une zone encaissée du carter supérieur (47a) de la chambre d'échappement (47).
  8. Motocyclette selon au moins l'une des revendications précédentes 1 à 7, caractérisée par le fait qu'il est prévu un dispositif de protection offrant un écran au capteur d'oxygène (49).
  9. Motocyclette selon au moins l'une des revendications précédentes 1 à 8, caractérisée par le fait que le dispositif de protection du capteur comprend un carénage, s'étendant vers le bas à partir du cadre inférieur et offrant un écran par le côté et par-dessous au capteur d'oxygène (49), et/ou un ensemble à plaques frontales offrant un écran vers l'avant au capteur d'oxygène.
  10. Motocyclette selon la revendication 8, caractérisée par le fait que l'ensemble à plaques frontales comprend une première plaque protectrice (74) faisant saillie au-delà de la chambre d'échappement (47), et assurant la solidarisation monobloc des carters supérieur et inférieur (47a, 47b) de celle-ci.
  11. Motocyclette selon les revendications 9 ou 10, caractérisée par le fait que l'ensemble à plaques protectrices comprend une seconde plaque protectrice (75) qui fait saillie au-delà du châssis (3), dépassant d'une seule pièce au-delà du carénage (60) et définissant un système à labyrinthe avec la première plaque protectrice (74).
  12. Motocyclette selon au moins l'une des revendications précédentes 3 à 11, caractérisée par le fait que la chambre d'échappement (47) comprend une région qui revêt pour l'essentiel la forme d'un V en coupe transversale, et est située au voisinage intime d'un carter à huile (61) placé au-dessus de la chambre d'échappement, ledit carter à huile (61) présentant une configuration de fond adaptée à la face supérieure de la chambre d'échappement (47), tandis que le capteur d'oxygène (49) dépasse pour l'essentiel latéralement, avec inclinaison vers le haut, au-delà d'une zone de solidarisation entre les carters supérieur et inférieur (47a, 47b) de la chambre d'échappement (47).
  13. Motocyclette selon au moins l'une des revendications précédentes 1 à 12, caractérisée par le fait qu'un côté supérieur du capteur d'oxygène (49) est protégé par un carter à huile (61) du moteur (19).
EP92102854A 1991-02-22 1992-02-20 Motocyclette avec dispositif d'échappement Expired - Lifetime EP0500105B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP50412/91 1991-02-22
JP3050412A JP2966554B2 (ja) 1991-02-22 1991-02-22 自動二輪車用排気装置のｏ２ センサ配置構造
JP26103991 1991-09-11
JP261039/91 1991-09-11

Publications (2)

Publication Number Publication Date
EP0500105A1 EP0500105A1 (fr) 1992-08-26
EP0500105B1 true EP0500105B1 (fr) 1996-09-18

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EP92102854A Expired - Lifetime EP0500105B1 (fr) 1991-02-22 1992-02-20 Motocyclette avec dispositif d'échappement

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EP (1) EP0500105B1 (fr)
DE (1) DE69213780T2 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2738032B1 (fr) * 1995-08-25 1997-09-19 Renault Moteur a combustion interne comportant un dispositif d'echappement a pot catalytique
US5946908A (en) * 1996-01-17 1999-09-07 Yamaha Hatsudoki Kabushiki Kaisha Engine control and wall temperature sensor
JP2000248925A (ja) * 1999-02-25 2000-09-12 Honda Motor Co Ltd 排気装置構造
JP4145423B2 (ja) * 1999-05-28 2008-09-03 本田技研工業株式会社 自動二輪車における排気ガスセンサ装置
TW530115B (en) * 1999-06-25 2003-05-01 Honda Motor Co Ltd Exhaust emission control device
JP4282968B2 (ja) * 2002-09-26 2009-06-24 本田技研工業株式会社 低床式車両の排気管構造
JP4392315B2 (ja) * 2004-09-30 2009-12-24 本田技研工業株式会社 自動二輪車における空燃比センサの配置構造
JP2006097605A (ja) * 2004-09-30 2006-04-13 Honda Motor Co Ltd 自動二輪車における空燃比センサの配置構造
JP4745179B2 (ja) * 2006-09-14 2011-08-10 ヤマハ発動機株式会社 自動二輪車
JP2019039406A (ja) * 2017-08-28 2019-03-14 ヤマハ発動機株式会社 鞍乗型車両
CN112351935B (zh) * 2018-08-15 2022-05-10 本田技研工业株式会社 机动二轮车的氧气传感器配置结构

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