EP2436895B1 - Exhaust apparatus for motorcycle - Google Patents
Exhaust apparatus for motorcycle Download PDFInfo
- Publication number
- EP2436895B1 EP2436895B1 EP11183086.5A EP11183086A EP2436895B1 EP 2436895 B1 EP2436895 B1 EP 2436895B1 EP 11183086 A EP11183086 A EP 11183086A EP 2436895 B1 EP2436895 B1 EP 2436895B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust
- pipe
- section
- communication pipe
- sensor
- 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.)
- Not-in-force
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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
- F01N13/008—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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
-
- 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- 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
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Description
- The present invention relates to an exhaust apparatus for a motorcycle equipped with an exhaust sensor for detecting the oxygen concentration in exhaust gas.
- For example, as an exhaust apparatus for a motorcycle with a multi-cylinder engine, an exhaust apparatus is known that is equipped with two exhaust pipes connected to respective cylinders, exhaust mufflers respectively connected to the exhaust pipes, and an exhaust communication pipe providing communication between the two exhaust pipes (for example, refer to Patent document 1). Since the cylinders are different from each other in explosion timing, the exhaust communication pipe is provided to reduce back pressure by dividing the flow of exhaust gas from each cylinder into two exhaust routes and to improve the output of the engine.
- In the exhaust apparatus disclosed in
Patent document 1, the two exhaust pipes are an upper exhaust pipe and a lower exhaust pipe and communicate with each other via the exhaust communication pipe. An exhaust sensor is disposed at a position on each of the upper exhaust pipe and the lower exhaust pipe on the downstream side of the exhaust communication pipe. -
JP 2005-069208 EP 1 643 096 A1 - Patent document 1: Japanese Patent Application Laid-Open Publication No.
2006-112239 - Although it is preferable that the exhaust sensor is disposed on each of the upper exhaust pipe and the lower exhaust pipe to perform appropriate fuel supply control for each cylinder, the number of the exhaust sensors to be disposed increases, and the cost rises.
- Furthermore, since the exhaust sensor is disposed on the upper face or the side face of each of the upper exhaust pipe and the lower exhaust pipe, there is a danger that external forces may be applied to the exhaust sensor. Moreover, since the exhaust sensor is seen from the outside, there is a problem that the external appearance of the vehicle becomes undesirable.
- Accordingly, in order to solve the technical problems encountered in the conventional exhaust apparatus, the present invention provides an exhaust apparatus for a motorcycle according to
claim 1, wherein the number of components can be reduced, the exhaust sensor thereof can be protected effectively against external forces and the desirable external appearance of the vehicle can be maintained. - In order to solve the above-mentioned technical problems, the present invention provides an exhaust apparatus for a motorcycle described below.
- More specifically, the exhaust apparatus according to
claim 1 of the present invention, exhaust mufflers of which are respectively connected to the exhaust downstream ends of a left exhaust pipe and a right exhaust pipe connected to the exhaust ports of an engine, and positioned on the left side and on the right side, respectively, as viewed toward the front of the vehicle body, each of the left exhaust pipe and the right exhaust pipe is curved and bent downward from a cylinder head, extends rearward under a crankcase of the engine and further extends rearward passing through the vicinity of the front section of a swing arm, wherein an exhaust sensor for detecting the oxygen concentration in exhaust gas is disposed on an exhaust communication pipe providing communication between the left exhaust pipe and the right exhaust pipe, the exhaust communication pipe is connected to the left exhaust pipe and the right exhaust pipe at exhaust communication sections of the exhaust pipes positioned in the vicinities of exhaust downstream ends of the exhaust pipes and on exhaust upstream sides from the exhaust downstream ends, and each of the exhaust communication sections of the exhaust pipes has an approximately circular exhaust passage hole having a pipe wall, part of which on an exhaust downstream side extends in an approximately crescent shape. - The exhaust apparatus according to
claim 2 of the present invention is characterized in that the exhaust sensor is disposed so as to extend forward in the longitudinal direction of the motorcycle and obliquely upward. - The exhaust apparatus according to
claim 3 of the present invention is characterized in that the exhaust communication pipe is configured so that the cross-sectional area of an exhaust passage in the exhaust communication pipe is approximately uniform. - The exhaust apparatus according to claim 4 of the present invention is characterized in that a fringe section of an exhaust passage cross-section of a sensor mounting section on the exhaust communication pipe on which the exhaust sensor is disposed is formed of a flat section for mounting the exhaust sensor, a circular section constituting the main portion of the fringe section by virtue of the wall of the exhaust communication pipe, and an extending section disposed to connect the flat section to the circular section and protruding outward from the circular section.
- The exhaust apparatus according to
claim 5 of the present invention is characterized in that the exhaust communication pipe is formed of a left communication pipe to be connected to the left exhaust pipe, a right communication pipe to be connected to the right exhaust pipe, and a connection adaptor to be connected to the left communication pipe and the right communication pipe, and that the exhaust sensor is disposed in the connection adaptor. - With the present invention according to
claim 1, since the oxygen concentration in the exhaust gas discharged from both the left exhaust pipe and the right exhaust pipe can be detected using the exhaust sensor disposed on the exhaust communication pipe, an effect is obtained that the number of components can be decreased and the cost can be reduced. Furthermore, since the exhaust sensor is disposed between the left exhaust pipe and the right exhaust pipe, that is, at an approximately central position in the width direction of the vehicle, an effect is obtained that the exhaust sensor can be protected effectively against external forces, and another effect is obtained that the external appearance of the vehicle can be maintained properly. - Since the exhaust communication pipe is positioned close to the catalyst disposed inside each of the exhaust mufflers and the distance between the exhaust sensor and the catalyst can be shortened, an effect is obtained that fuel supply control can be carried out more properly.
- With the present invention according to
claim 2, an effect is obtained that water can be prevented from intruding into the exhaust sensor, and another effect is obtained that the wiring length of the harness for connecting the exhaust sensor to the ECU of the vehicle can be shortened. - With the present invention according to
claim 3, an effect is obtained that the rise in back pressure is suppressed and the output of the engine is not reduced. - With the present invention according to claim 4, since the cross-sectional area of the exhaust passage at the sensor mounting section of the exhaust communication pipe is made approximately the same as that of the exhaust passage at the other part of the exhaust communication pipe, an effect is obtained that the rise in back pressure is suppressed and the output of the engine is not reduced.
- With the present invention according to
claim 1, entire circumference welding can be carried out between a connection cover and each of the exhaust pipes while the exhaust communication pipe is positioned close to the connection cover. As a result, since the distance between the exhaust sensor and the catalyst disposed inside each of the exhaust mufflers can be shortened, an effect is obtained that fuel supply control can be carried out more properly. - With the present invention according to
claim 5, an effect is obtained that the positioning adjustment of the exhaust communication pipe in the exhaust apparatus can be carried out easily. -
-
FIG. 1 is a left side view of a motorcycle to which the present invention is applied; -
FIG. 2 is a perspective view showing part of the exhaust apparatus of the motorcycle shown inFIG. 1 as viewed from the right rear side of the vehicle body; -
FIG. 3 is a perspective view showing the exhaust apparatus of the motorcycle shown inFIG. 1 as viewed from the left front side of the vehicle body; -
FIG. 4 is a plan view showing the exhaust apparatus of the motorcycle shown inFIG. 1 ; -
FIG. 5 is a front view showing the left exhaust pipe and part of the exhaust communication pipe of the motorcycle shown inFIG. 1 as viewed from the front of the vehicle; -
FIG. 6 is a left side view showing the right exhaust pipe and the other part of the exhaust communication pipe of the motorcycle shown inFIG. 1 ; -
FIG. 7 is a left side sectional view showing the right exhaust pipe before the exhaust communication pipe is connected thereto; and -
FIG. 8 is a sectional view showing an exhaust gas sensor mounting section taken on line VIII-VIII ofFIG. 5 . - An
exhaust apparatus 8 of amotorcycle 1 according to a preferred embodiment of the present invention will be described below referring to the accompanying drawings. In the present invention, "right" is the right side as viewed toward the front of the vehicle body, and "left" is the left side as viewed toward the front of the vehicle body. -
FIG. 1 is a left side view of themotorcycle 1 to which the present invention is applied. Furthermore,FIG. 2 is a perspective view showing part of theexhaust apparatus 8 of themotorcycle 1 shown inFIG. 1 as viewed from the right rear side of the vehicle body. InFIG. 1 , avehicle body frame 2 is approximately formed into a parallelogram as viewed from the side and is integrally equipped with a rear frame extending rearward. Afront fork 5 is supported on thehead pipe 3 formed on the front upper end section of thevehicle body frame 2, ahandle bar 6 is provided on the upper end section of thefront fork 5, and afront wheel 7 is supported at the lower end section of thefront fork 5. - At the rear lower end section of the
vehicle body frame 2, the front end section of theswing arm 10 is supported so as to be swingable in the up-down direction via an arm support shaft, and arear wheel 11 is supported at the rear end section of theswing arm 10. Arear suspension 13 is disposed between the frontward portion of theswing arm 10 and the rear upper end section of thevehicle body frame 2 so as to be contractible and extensible, thereby elastically supporting theswing arm 10. - A
fuel tank 15, aseat 16 and a rear seat are installed on thevehicle body frame 2 in this order from the front. Various electric components and other components are disposed under theseat 16 and the rear seat. An engine (for example, a parallel two-cylinder engine) 18 is mounted inside thevehicle body frame 2. -
FIG. 3 is a perspective view showing theexhaust apparatus 8 of themotorcycle 1 shown inFIG. 1 as viewed from the left front side of the vehicle body.FIG. 4 is a plan view showing theexhaust apparatus 8 of themotorcycle 1 shown inFIG. 1 . Each of aleft exhaust pipe 20 and aright exhaust pipe 21 is connected to the front exhaust connection port of the cylinder head of each cylinder. For example, theleft exhaust pipe 20 communicates with a first cylinder, and theright exhaust pipe 21 communicates with a second cylinder. Each of theleft exhaust pipe 20 and theright exhaust pipe 21 is curved and bent downward from the cylinder head, extends rearward under thecrankcase 19 of theengine 18, and further extends rearward through the vicinity of the front section of theswing arm 10. - A
left exhaust muffler 22 and aright exhaust muffler 23 extending rearward in the longitudinal direction of the vehicle are connected to the rear ends of theleft exhaust pipe 20 and theright exhaust pipe 21, respectively.Tale pipes left exhaust muffler 22 and theright exhaust muffler 23, respectively.Mounting brackets left exhaust muffler 22 andright exhaust muffler 23 on the rear frame of thevehicle body frame 2 are formed on theleft exhaust muffler 22 andright exhaust muffler 23, respectively. Furthermore,protective members exhaust mufflers left exhaust muffler 22 and theright exhaust muffler 23, respectively. - The
left exhaust pipe 20 and theright exhaust pipe 21 are connected to each other via anexhaust communication pipe 30 so as to internally communicate with each other. Theexhaust communication pipe 30 is connected to theleft exhaust pipe 20 and theright exhaust pipe 21 by welding at the exhaust communication sections of the exhaust pipes positioned in the vicinities of the exhaust downstream ends of the exhaust pipes and on the exhaust upstream sides from the exhaust downstream ends. The structure of the connection from theexhaust communication pipe 30 to theleft exhaust pipe 20 and theright exhaust pipe 21 will be described below. - The
exhaust communication pipe 30 is formed of aleft communication pipe 32 to be connected to theleft exhaust pipe 20, aright communication pipe 33 to be connected to theright exhaust pipe 21, and aconnection adaptor 34 to be connected to theleft communication pipe 32 and the right communication pipe 33- While theleft communication pipe 32 is fitted into theleft connection section 52 of theconnection adaptor 34, the entire circumference of the connection section therebetween is welded to connect theleft communication pipe 32 to theconnection adaptor 34. While theright communication pipe 33 is fitted into a steppedright connection section 54 of theconnection adaptor 34 via a gasket, the connection section therebetween is fastened with a clamp band, whereby theright communication pipe 33 is detachably connected to theconnection adaptor 34. However, the method and direction of the connection from theconnection adaptor 34 to theleft communication pipe 32 and theright communication pipe 33 are not limited to the above-mentioned method and direction, but known methods and directions can be applied appropriately. - Each of the
left exhaust pipe 20 and theright exhaust pipe 21 has anexhaust passage hole 60 opening obliquely downward on the inner side in the width direction of the vehicle and at a slightly lower position. As shown inFIG. 7 , theexhaust passage hole 60 is not a complete circle. For example, a crescentpipe wall portion 61 is provided at the rear end portion on the exhaust downstream side of each exhaust pipe. As shown inFIG. 7 , the crescentpipe wall portion 61 is provided so that entire circumference welding can be carried out between theleft exhaust pipe 20 and a bowl-shapedconnection cover 72 and between theright exhaust pipe 21 and a bowl-shapedconnection cover 73 while theexhaust communication pipe 30 is positioned as close as possible to the bowl-shaped connection covers 72 and 73. With this configuration, theexhaust communication pipe 30 is positioned close to the catalyst disposed inside each of theexhaust mufflers exhaust sensor 40 and the catalyst can be shortened, whereby fuel supply control can be carried out more properly. However, the shape of the connection covers 72 and 73 is not limited to the bowl shape, but can be a nearly conical shape or the like. - A left connection joint 74 having a diameter larger than the diameter of the
exhaust passage hole 60 formed in theleft exhaust pipe 20 is connected to theleft exhaust pipe 20 by entire circumference welding, and the left connection joint 74 extends obliquely downward to the central portion in the width direction of the vehicle. Similarly, a right connection joint 75 having a diameter larger than the diameter of theexhaust passage hole 60 formed in theright exhaust pipe 21 is connected to theright exhaust pipe 21 by entire circumference welding, and the right connection joint 75 extends obliquely downward to the central portion in the width direction of the vehicle. The central end section of the left connection joint 74 is connected to theleft communication pipe 32 by entire circumference welding. The central end section of the right connection joint 75 is connected to theright communication pipe 33 by entire circumference welding. As shown inFIG. 5 , the left connection joint 74 is curved slightly, and theconnection adaptor 34 extends as a straight pipe. Furthermore, the right connection joint 75 being curved slightly is connected to theconnection adaptor 34. Hence, theexhaust communication pipe 30 has a nearly U shape as a whole, its central section being positioned slightly downward. - Moreover, the outside portions of the left connection joint 74 and the right connection joint 75 are covered with a left
protective cover 38 and a rightprotective cover 39, respectively. With this configuration, areas discolored (burnt) by heat in the vicinities of the portions of theexhaust pipes exhaust communication pipe 30 is connected can be covered so as not to be seen externally. In the case that the exposed portion of theleft exhaust pipe 20 is longer than that of theright exhaust pipe 21, the leftprotective cover 38 can be configured so as to extend longer than the rightprotective cover 39 in the longitudinal direction of the vehicle. - Since the
exhaust communication pipe 30 has a nearly U shape, theleft exhaust pipe 20 and theright exhaust pipe 21 can be disposed upward. Still further, as shown inFIG. 5 , the axial center B of theleft exhaust muffler 22 is positioned higher in the height direction of the vehicle and deflected more outward in the width direction of the vehicle than the axial center A of theleft exhaust pipe 20. Similarly, the axial center of theright exhaust muffler 23 is positioned higher in the height direction of the vehicle and deflected more outward in the width direction of the vehicle than the axial center of theright exhaust pipe 21. The bank angle of the vehicle can be obtained securely by disposing theleft exhaust muffler 22 and theright exhaust muffler 23 upward. In addition, interference with theswing arm 10 can be prevented by disposing theleft exhaust muffler 22 and theright exhaust muffler 23 outward in the width direction of the vehicle. - A mounting section for mounting the
exhaust sensor 40 is formed on theexhaust communication pipe 30. For example, the mounting section may be formed on theconnection adaptor 34. An internally threadedsensor mounting socket 50 for mounting theexhaust sensor 40 is disposed on the circumferential face of theconnection adaptor 34, the circumferential face being provided forward in the longitudinal direction of the vehicle and directed obliquely upward, and theexhaust sensor 40 is threaded into thesensor mounting socket 50. As shown inFIG. 8 , the fringe section of the exhaust passage cross-section of thesensor mounting socket 50 on which theexhaust sensor 40 is disposed is formed of aflat section 81 for mounting theexhaust sensor 40, acircular section 83 constituting the main portion of the fringe section by virtue of the wall of theexhaust communication pipe 30, and an extendingsection 82 disposed to connect theflat section 81 to thecircular section 83 and protruding slightly outward from thecircular section 83. In other words, the cross-sectional area of the exhaust passage in thesensor mounting socket 50 is made approximately the same as the cross-sectional area of the exhaust passage in the other portion by protruding theflat section 81 for mounting theexhaust sensor 40 slightly outward. The rise in back pressure is suppressed and the output of the engine is prevented from lowering by making the cross-sectional area of the exhaust passage in theexhaust communication pipe 30 having thesensor mounting socket 50 approximately uniform. - As described above, the
exhaust 40 mounted in theconnection adaptor 34 of theexhaust communication pipe 30 is located at an approximately central position in the width direction of the vehicle and disposed so as to extend forward in the longitudinal direction of the vehicle and obliquely upward. The oxygen concentration in the exhaust gas discharged from both theleft exhaust pipe 20 and theright exhaust pipe 21 can be detected using a single exhaust sensor, i.e., theexhaust sensor 40, by disposing theexhaust sensor 40 on theexhaust communication pipe 30 providing communication between theleft exhaust pipe 20 and theright exhaust pipe 21. When themotorcycle 1 is viewed from its side, theexhaust sensor 40 is inconspicuous since it is hidden by theleft exhaust pipe 20, theright exhaust pipe 21 and the rear frame of thevehicle body frame 2. For this reason, theexhaust sensor 40 does not spoil the appearance of the vehicle. In addition, theexhaust sensor 40 is prevented from making contact with the feet of the rider. - It is preferable that the
exhaust sensor 40 is inclined forward in the longitudinal direction of the vehicle and obliquely upward with respect to the horizontal plane. Its inclination angle is, for example, approximately 45 degrees. Since theexhaust sensor 40 is mounted on theexhaust communication pipe 30 in a state of being directed forward in the longitudinal direction of the vehicle and obliquely upward, even if the steam inside the exhaust gas condensates into water, the water can be prevented from intruding into theexhaust sensor 40. - A
harness 42 protruding from theexhaust sensor 40 mounted in theconnection adaptor 34 of theexhaust communication pipe 30 extends forward in the longitudinal direction of the vehicle and obliquely upward and is connected to an ECU (electric control unit) With this configuration, the wiring length of theharness 42 for connecting theexhaust sensor 40 to the ECU can be shortened. -
- 1:
- motorcycle
- 8:
- exhaust apparatus
- 20:
- left exhaust pipe
- 21:
- right exhaust pipe
- 22:
- left exhaust muffler
- 23:
- right exhaust muffler
- 30:
- exhaust communication pipe
- 40:
- exhaust sensor
- 50:
- sensor mounting socket
- 60:
- exhaust passage hole
Claims (5)
- An exhaust apparatus (8) for a motorcycle, exhaust mufflers (22, 23) of which are respectively connected to the exhaust downstream ends of a left exhaust pipe (20) and a right exhaust pipe (21) connected to the exhaust ports of an engine and positioned on the left side and on the right side, respectively, as viewed toward the front of the vehicle body,each of the left exhaust pipe (20) and the right exhaust pipe (21) is curved and bent downward from a cylinder head, extends rearward under a crankcase (19) of the engine (18), and further extends rearward passing through the vicinity of the front section of a swing arm (10), whereinan exhaust sensor (40) for detecting the oxygen concentration in exhaust gas is disposed on an exhaust communication pipe (30) providing communication between the left exhaust pipe (20) and the right exhaust pipe (21),the exhaust communication pipe (30) is connected to the left exhaust pipe (20) and the right exhaust pipe (21) at exhaust communication sections of the exhaust pipes (20, 21) positioned in the vicinities of exhaust downstream ends of the exhaust pipes (20, 21) and on exhaust upstream sides from the exhaust downstream ends, andcharacterized in that each of the exhaust communication sections of the exhaust pipes (20, 21) has an approximately circular exhaust passage hole (60) having a pipe wall (61), part of which on an exhaust downstream side extends in an approximately crescent shape.
- The exhaust apparatus (8) according to claim 1, wherein the exhaust sensor (40) is disposed so as to extend forward in the longitudinal direction of the motorcycle and obliquely upward.
- The exhaust apparatus (8) according to any one of claims 1 and 2, wherein the exhaust communication pipe (30) is configured so that the cross-sectional area of an exhaust passage in the exhaust communication pipe (30) is approximately uniform.
- The exhaust apparatus (8) according to any one of claims 1 to 3, wherein a fringe section of an exhaust passage cross-section of a sensor mounting section on the exhaust communication pipe (30) on which the exhaust sensor (40) is disposed is formed of a flat section (81) for mounting the exhaust sensor (40), a circular section (83) constituting the main portion of the fringe section by virtue of the wall of the exhaust communication pipe (30), and an extending section (82) disposed to connect the flat section (81) to the circular section (83) and protruding outward from the circular section (83).
- The exhaust apparatus (8) according to any one of claims 1 to 4, whereinthe exhaust communication pipe (30) is formed of a left communication pipe (32) to be connected to the left exhaust pipe (20), a right communication pipe (33) to be connected to the right exhaust pipe (21), and a connection adaptor (34) to be connected to the left communication pipe (20) and the right communication pipe (21), andthe exhaust sensor (40) is disposed in the connection adaptor (34).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010224780A JP5650484B2 (en) | 2010-10-04 | 2010-10-04 | Motorcycle exhaust system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2436895A1 EP2436895A1 (en) | 2012-04-04 |
EP2436895B1 true EP2436895B1 (en) | 2019-04-10 |
Family
ID=44677755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11183086.5A Not-in-force EP2436895B1 (en) | 2010-10-04 | 2011-09-28 | Exhaust apparatus for motorcycle |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2436895B1 (en) |
JP (1) | JP5650484B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10393001B2 (en) * | 2017-08-10 | 2019-08-27 | Kohler Co. | Marine exhaust system |
WO2023190225A1 (en) * | 2022-03-30 | 2023-10-05 | 本田技研工業株式会社 | Exhaust device for saddle-ride vehicle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58134616U (en) * | 1982-03-08 | 1983-09-10 | 本田技研工業株式会社 | Exhaust gas sensor device for motorcycles |
JPS63115557U (en) * | 1987-01-23 | 1988-07-26 | ||
EP1643096A1 (en) * | 2004-09-30 | 2006-04-05 | HONDA MOTOR CO., Ltd. | Mounting structure for air-fuel ratio sensor in motercycle |
EP1921286A1 (en) * | 2006-10-30 | 2008-05-14 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust system for motorcycle |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5292115U (en) * | 1976-01-06 | 1977-07-09 | ||
JPS5566611A (en) * | 1978-11-15 | 1980-05-20 | Yamaha Motor Co Ltd | Exhaust system for motor cycle |
JPS5999021A (en) * | 1982-11-26 | 1984-06-07 | Honda Motor Co Ltd | O2-sensor attaching structure for v-type multi-cylinder engine |
JPH0681896B2 (en) * | 1985-08-26 | 1994-10-19 | ヤマハ発動機株式会社 | Exhaust pipe device for multi-cylinder engine for motorcycles |
JP4326287B2 (en) * | 2003-08-28 | 2009-09-02 | 川崎重工業株式会社 | Motorcycle and its exhaust mechanism |
JP4397784B2 (en) | 2004-10-12 | 2010-01-13 | 川崎重工業株式会社 | Motorcycle and its exhaust mechanism |
-
2010
- 2010-10-04 JP JP2010224780A patent/JP5650484B2/en not_active Expired - Fee Related
-
2011
- 2011-09-28 EP EP11183086.5A patent/EP2436895B1/en not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58134616U (en) * | 1982-03-08 | 1983-09-10 | 本田技研工業株式会社 | Exhaust gas sensor device for motorcycles |
JPS63115557U (en) * | 1987-01-23 | 1988-07-26 | ||
EP1643096A1 (en) * | 2004-09-30 | 2006-04-05 | HONDA MOTOR CO., Ltd. | Mounting structure for air-fuel ratio sensor in motercycle |
EP1921286A1 (en) * | 2006-10-30 | 2008-05-14 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust system for motorcycle |
Also Published As
Publication number | Publication date |
---|---|
JP5650484B2 (en) | 2015-01-07 |
EP2436895A1 (en) | 2012-04-04 |
JP2012077698A (en) | 2012-04-19 |
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