DESC:TECHNICAL FIELD
[0001] The present subject matter relates generally to a two-wheeled motor vehicle, and more particularly to a muffler assembly for the two-wheeled motor vehicles.
BACKGROUND
[0002] Generally, in a two-wheeled saddle-ride type vehicle a frame assembly extends rearward from a head tube. The frame assembly acts as a skeleton for the vehicle that supports the vehicle loads. A front portion of the frame assembly connects to a front wheel through one or more front suspension(s). The frame assembly extends rearward of the vehicle, where a rear wheel is connected to a frame assembly through one or more rear suspension(s). An internal combustion (IC) engine is mounted to the frame assembly of the vehicle. The IC engine is functionally connected to the rear wheel, which provides the forward motion to the vehicle. Typically, plurality of panels are mounted to the frame assembly of the vehicle that cover various vehicle components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0003] The detailed description of the present subject matter is described with reference to the accompanying figures. Same numbers are used throughout the drawings to reference like features and components.
[0004] Fig. 1 illustrates a right side view of an exemplary two-wheeled motor vehicle, in accordance with an embodiment of the present subject matter.
[0005] Fig. 2 (a) illustrates a right side view of a frame assembly of a two-wheeled motor vehicle, in accordance with an embodiment of the present subject matter.
[0006] Fig. 2 (b) depicts a right side view of the muffler assembly and the exhaust pipe assembly connected thereof.
[0007] Fig. 2 (c) depicts a rear perspective view of the muffler assembly connected to the exhaust pipe assembly, for embodiment depicted in Fig. 2 (a).
[0008] Fig. 3 depicts a muffler assembly connected to exhaust pipe assembly, in accordance with another embodiment of the present subject matter.
DETAILED DESCRIPTION
[0009] Typically, in a two-wheeled saddle-ride type motor vehicle, an engine assembly is mounted to the frame assembly in a front portion. A fuel tank is disposed above the engine assembly. A carburetor or the like supplies air fuel mixture to the engine assembly. Combustion of air-fuel mixture occurs in the engine assembly and a piston disposed in the engine assembly is set to operate in a linear motion. The linear motion of the piston is converted into the rotation motion and the resultant motion is transferred to the rear wheel for motion of the vehicle. This results in generation required power and torque by the engine assembly.
[00010] Generally, the exhaust system extends from the engine assembly towards a rear portion of the vehicle. The combusted air-fuel mixture, which are the exhaust gases are sent to atmosphere using a muffler, which is a part of the exhaust system. In addition, heat generated in the engine assembly during combustion is also transferred to the exhaust system of the vehicle. Moreover, noise or sound is also generated from the vehicles. With stringent emission norms, there is a need for inclusion of catalytic converter in the muffler. The catalytic converter enables in conversion of un-burnt gases. The catalytic converter may produce backpressure affecting the engine performance. Moreover, the muffler also aids in reduction of noise, which is another essential function of the muffler assembly.
[00011] However, due to the exothermic reaction occurring with the catalytic converter, the temperature in proximity to the catalytic converter is higher. Therefore, the pillion foot or the rider foot may be exposed to the heat dissipated by the muffler. Moreover, with increasing engine capacity, there is need for muffler with varying capacity. This would affect the layout of the vehicle.
[00012] Thus, there is need for a muffler assembly capable of addressing aforementioned and other problems in the prior art. Also, compactness of the vehicle should be retained.
[00013] Hence, an objective of the present subject matter is to provide a muffler assembly for a two-wheeled vehicle.
[00014] According to one aspect of the present subject matter, the muffler assembly for the two-wheeled vehicle enables reduction of heat dissipation towards pillion foot or rider foot.
[00015] According to one another aspect, the muffler assembly is connected to the internal combustion engine through an exhaust pipe assembly. Further, the exhaust pipe assembly is provided with one or more first catalytic converters disposed about the exhaust pipe assembly. The exhaust gas from the engine passes by the first catalytic converter and oxidizes exhaust gases.
[00016] According to another aspect, inlet of intermediate chamber is connected to a downstream end of the exhaust pipe assembly and the intermediate chamber of the muffler assembly is provided with a secondary mounting member that is provided with a at least one second catalytic converter that enable further oxidizing of the exhaust gases.
[00017] According to yet another aspect, the intermediate chamber is connected to a secondary chamber disposed above the intermediate chamber. The secondary chamber is provided with plurality of baffles. In a preferred embodiment, the baffles are disposed transverse to the direction of flow of the exhaust gas thereby reducing noise.
[00018] According to one more aspect, the intermediate chamber defines a first volume and the secondary chamber defines a second volume. Therefore, the muffler assembly provides an integrated volume of first volume and second volume thereby accommodating the exhaust gas.
[00019] It is one more additional aspect that the muffler assembly is disposed adjacent to the rear wheel and downwardly to a pillion seat below a pillion foot rest. It is an advantage that the second catalytic converter is disposed in the intermediate chamber away from the pillion footrest. It is an advantage that the heat dissipated from the intermediate chamber is away from the pillion footrest.
[00020] It is yet another additional aspect that the secondary chamber is connected to the intermediate chamber at a portion in proximity to the inlet of the intermediate chamber. This enables the exhaust gas to circulate in the intermediate chamber before exiting the intermediate chamber into the secondary chamber. Further, the secondary mounting portion is provided with perforated portion that further enables reduction of noise.
[00021] According another aspect, the muffler assembly provides improved muffler volume. The muffler assembly provides a intermediate chamber and a secondary chamber that provide improved volume and at the same time enable in reduction of noise. It is an advantage that the exhaust gas transferred from intermediate chamber to secondary chamber and then to tail pipe provides reduced noise.
[00022] It is another additional feature that the change in geometry of the chamber and provision of intermediate chamber and secondary chamber enable reduction of noise.
[00023] It is yet one more feature of the present subject matter that the muffler assembly provides oxidized gases and reduced noise.
[00024] Further aspect being, the vehicle mounted with the muffler assembly is compact. The secondary chamber of the muffler assembly is disposed above the intermediate chamber thereby by proving a compact layout. It is yet another aspect that the width of the muffler assembly is less than the height of the muffler assembly thereby providing compact layout for the vehicle. The muffler assembly provides improved volume without increasing the width of the vehicle.
[00025] In an embodiment in accordance with the present subject matter, a two-wheeled vehicle mounted with a muffler assembly is provided. An exhaust pipe assembly extends from an exhaust port towards a muffler assembly of the vehicle. The muffler assembly is disposed rearwardly to the rider foot bracket and at least a portion of the muffler assembly is disposed downwardly of the pillion foot bracket.
[00026] In an embodiment, the exhaust pipe assembly comprises of an exhaust pipe that connects the engine assembly to the muffler assembly. The exhaust pipe extends sidewardly downward and rearward towards the muffler assembly, which is disposed adjacently of a rear wheel of the vehicle. Further, the muffler assembly extends substantially in longitudinal direction of the vehicle. The exhaust pipe is capable of accommodating one or more catalytic converters. In a preferred embodiment, a first catalytic converter is disposed downwardly forward to a pillion footrest, which is substantially away from the pillion footrest.
[00027] In an embodiment, the muffler assembly comprises of a intermediate chamber and a secondary chamber. The secondary chamber is disposed adjacently of the intermediate chamber. In a preferred embodiment, the secondary chamber is disposed adjacently upwardly to the intermediate chamber. A rear portion of the exhaust pipe assembly is coupled to the muffler assembly. The intermediate chamber of the muffler assembly is provided with a secondary pipe that is coupled to the outlet of the exhaust pipe assembly. Further, the secondary pipe is provided with a secondary mounting portion, which is capable of accommodating a second catalytic converter.
[00028] In an embodiment, the intermediate chamber of the muffler assembly extends inclinedly rearward. Further, an inlet of the secondary chamber is coupled to the intermediate chamber. Also, the secondary chamber extends inclinedly rearward. In one embodiment, the secondary chamber extends substantially rearward from a rear portion of the intermediate chamber. The secondary chamber is provided with one or more baffles. Further, the secondary chamber is provided one or more tail pipe(s) that are disposed at a rear portion. The exhaust gases are directed into the atmosphere through the one or more tail pipe(s).
[00029] In one implementation, the secondary chamber is inclinedly disposed adjacently above the intermediate chamber. An upper peripheral surface adjacent to the secondary chamber extends inclinedly upward along a lower peripheral surface of the secondary chamber forming a bend. It is an advantage that the intermediate chamber and the secondary chamber are compactly disposed adjacent to each other. Moreover, the intermediate chamber and the secondary chamber are independently disposed. Therefore, it is an advantage that the heat dissipated in the intermediate chamber does not affect the secondary chamber thereby improving the performance of the muffler assembly.
[00030] The present subject matter provides, the muffler assembly disposed with the second catalytic converter that is disposed substantially downwardly of the pillion foot bracket, thereby reducing the heat dissipation towards the pillion footrest. Also, the second catalytic converter is disposed downwardly rearward to the rider foot bracket, thereby reducing heat dissipation towards the rider foot bracket. Further, the muffler assembly is extending inclinedly rearward, thereby reducing possibility of pillion footrest coming in contact with the muffler assembly.
[00031] In one implementation, the intermediate chamber is having a lower surface tapered in a longitudinal direction of the vehicle. This provides sufficient clearance and at the same time a minimum portion of the muffler assembly is in proximity to ground. It is an advantage that dirt settling on the muffler assembly is reduced thereby improving life of the system.
[00032] In another embodiment, the exhaust pipe assembly is provided with a sensor-mounting portion. The sensor-mounting portion is disposed forwardly of the first mounting portion of the exhaust pipe assembly and is capable of accommodating an oxygen sensor or the like.
[00033] Further, the present subject matter enables in reduction of emissions. Also, the noise from the muffler is reduced thereby reducing overall noise of the vehicle. Also, with improved volume of the muffler assembly, performance of the vehicle is improved.
[00034] The aforesaid and other advantages of the present subject matter would be described in greater detail in conjunction with the figures in the following description.
[00035] Arrows wherever provided in the top right corner of figure(s) in the drawings depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow UP denotes upward direction, an arrow DW denotes downward direction, an arrow RH denotes right side, and an arrow LH denotes left side.
[00036] Fig. 1 (a) illustrates a right side view of an exemplary two-wheeled saddle-ride type vehicle, in accordance with an embodiment of present subject matter. The vehicle 100 has a frame assembly 105, which acts as the skeleton for bearing the loads. The frame assembly105 extends from a front portion F towards a rear portion R of the vehicle 100, which is substantially along a longitudinal axis of the vehicle 100. A handle bar assembly 110 is rotatably disposed through a head tube 105A(shown in Fig. 2 (a))of the frame assembly 105. The handle bar assembly110 is connected to a front wheel 115 through one or more front suspension(s) 120. A front fender 125 is mounted to the one or more front suspension(s) 120 and covers at least a portion of the front wheel 115. A swing arm 160is swingably connected to the frame assembly 105. A rear wheel 130 is rotatably supported by the swing arm 160. A rear fender 135 is disposed upwardly of the rear wheel 130 and is covering at least a portion of the rear wheel 130. One or more rear suspension(s) 140, which connect the swing arm160 to the frame assembly 105, enable to sustain both the radial and axial forces occurring due to rear wheel reaction130. In one embodiment, a mono-shock suspension is used. A seat assembly 145 is mounted to the frame assembly 105. A fuel tank 150 is disposed at an anterior portion of the seat assembly 145.
[00037] An engine assembly 155is disposed substantially below the fuel tank 150and in the front portion F of the frame assembly105. The engine assembly 155is coupled to a starting mechanism for cranking the engine 155, a transmission system (not shown) for transferring the power to the rear wheel 130, and an air-fuel supply means. Further, a carburetor or a fuel injection system or the like (not shown), which act as the air-fuel supply means, supplies air-fuel mixture to the engine assembly 155. A muffler assembly 300(shown in Fig. 2 (a)) is mounted to the vehicle that transfers exhaust gases into atmosphere.
[00038] The handle bar assembly 110 includes a handle bar, an instrument cluster, handle grips and one or more levers. The vehicle 100 has various electrical loads including a headlamp 165, a tail lamp 170. Also, the vehicle 100 includes other electrical, electronic, and mechanical systems like an anti-brake system, a synchronous braking system, a vehicle control system, a vehicle diagnostics system. Further, plurality of body panels including a side panel 175A and a tail cover panel 175B are mounted to the frame assembly 105covering at least a portion of the frame assembly 105.
[00039] Fig. 2 (a)illustrates a right side view of a frame assembly105of a two-wheeled vehicle with parts laid thereon, in accordance with an embodiment of the present subject matter. The frame assembly 105 includes a head tube 105A, a main tube 105B extending rearward from the head tube 105A. The frame assembly further comprises a down tube 105C extending obliquely downward from a rear portion of the main tube105B. Also, one or more rear tubes 105D extend rearward from the main tube105B towards a rear portion of the vehicle 100. In an embodiment, the one or more rear tubes 105D are supported by a secondary tube(s) 105Ethat extend inclinedly rearward from the down tube 105C. In one embodiment, the frame assembly may include an additional tubular member extending obliquely downward from the head tube for supporting the frame assembly.
[00040] The frame assembly 105 is provided with one or more engine mounting bracket(s) 155A, 155B for mounting the engine assembly 155 (shown in Fig. 1) to the frame assembly 105. The seat assembly 145 (shown in Fig. 1) is mounted to the one or more rear tubes 105D of the frame assembly 105. The seat assembly 145 is capable of accommodating rider and pillion. Further, the down tube 105C of the frame assembly 105 is provided with a rider foot bracket 180. In one embodiment, the frame assembly 105 includes a pivot bracket (not shown) that supports the engine assembly 155 from rearward, supports the swing arm 160 (shown in Fig. 1), and supports a rider foot bracket 180. The rider foot bracket 180 is provided with a rider foot peg 180Afor resting rider foot. Further, the secondary frame 105E is mounted with a pillion foot bracket 185 and the pillion foot bracket 185supports a pillion foot peg 185A for resting pillion foot. The rider foot peg 180A and the pillion foot peg 185A are disposed on either lateral sides of the vehicle 100. The rider foot bracket 180 and the pillion foot bracket 185 are made of a rigid material, for example any known metal, and are secured to the frame assembly 105.
[00041] In the present embodiment, an exhaust pipe assembly 200 extends obliquely downward from an exhaust port (not shown) of the engine assembly 155and towards a muffler assembly 300 of the vehicle100. The muffler assembly 300 is disposed rearwardly to the rider foot bracket 180A and at least a portion of the muffler assembly 300 is disposed downwardly of the pillion foot bracket 185. Also, the muffler assembly 300is disposed laterally adjacent to the rear wheel 130.
[00042] Fig. 2 (b) depicts a right side view of the muffler assembly 300and the exhaust pipe assembly 200 connected thereof, in accordance with the embodiment of Fig. 2 (a). Fig. 2 (c) depicts a rear perspective view of the muffler assembly 300 connected to the exhaust pipe assembly 200, for embodiment depicted in Fig. 2 (a). The exhaust pipe assembly 200 comprises of inlet 205, which is an upstream end portion 205, coupled to the exhaust port of the engine assembly 155. An exhaust pipe 210 of the exhaust pipe assembly 200 extends sidewardly and downward from the inlet 205. Further, the exhaust pipe 210 extends substantially horizontally rearward towards the muffler assembly 300,which is disposed adjacently of the rear wheel 130, substantially extending in the longitudinal direction of the vehicle 100. The exhaust pipe 210 is provided with a first mounting portion 220, which is disposed forwardly downward to the rider foot bracket 180. The first mounting portion 220 is disposed about the exhaust pipe 210 and is capable of accommodating a first catalytic converter 215, which is disposed therein. In one embodiment, the first catalytic converter 215 implies one or more catalytic converter(s) 215 disposed about the exhaust pipe 210, therein. The first mounting portion 220 is disposed at an optimal distance from the exhaust port to reduce back pressure thereby improving engine performance. In the present embodiment, the first mounting portion 220 is disposed ahead of and downward to the rider foot bracket 180A. This enables heat dissipation away from the rider footrest 180A.
[00043] Further, the exhaust pipe assembly200 is provided with a first mounting bracket 225 that enables mounting of the exhaust port to the frame assembly 105. The exhaust pipe 210 and the first mounting bracket 225 is made of a rigid material, for example any known metal, and the first mounting bracket 225 is affixed to the exhaust pipe 210. A rear portion 230 of the exhaust pipe 210 is coupled to the muffler assembly 300.
[00044] Furthermore, the muffler assembly300, in the present embodiment, comprises of a intermediate chamber 305 and a secondary chamber 310. A rear portion 230, which is a downstream end portion 230, of the exhaust pipe assembly 200 is coupled to the intermediate chamber 305 of the muffler assembly 300. In one embodiment, the downstream end portion 230 of the exhaust pipe assembly is welded to an inlet 305Iof the intermediate chamber 305, disposed at the front portion of the intermediate chamber 305. The intermediate chamber 305 of the muffler assembly 300 is provided with a secondary pipe 325 that is coupled to the outlet 230 of the exhaust pipe assembly 200. Further, the secondary pipe 325 is provided with a secondary mounting portion 320, which is capable of accommodating one or more second catalytic converter(s) 315. One end of the secondary mounting portion 320 is connected to the secondary pipe 325 and other end is connected to a perforated portion 330.Therefore, exhaust gases from the engine assembly 155 enter the intermediate chamber 305 through the exhaust pipe assembly 200. The intermediate chamber 305 defines a volume V1, therein
[00045] The muffler assembly 300 for the two-wheeled vehicle 100 has the secondary chamber 310 inclinedly disposed adjacently above the intermediate chamber 305. The upper peripheral surface USI adjacent to the secondary chamber 310 extends inclinedly upward along a lower peripheral surface LSS of said secondary chamber 310 forming a bend B. Also, a lower peripheral surface LSI of the intermediate chamber 305 has tapered profile when extending in a longitudinal direction F-R. Therefore, a rear portion of the intermediate chamber 305 is away from the ground with respect to a front portion, which is the input portion 305I.
[00046] The intermediate chamber 305 and the secondary chamber 310 are having optimum contact portion. The heat dissipated at the intermediate chamber 305 will have reduce affect on the secondary chamber 310 thereby improving the performance of the muffler assembly 300. In an embodiment, the intermediate chamber 305 and the secondary chamber 310 are provided with a gap therebetween. In another embodiment, an upper surface of the secondary chamber 310 is covered by a cover member (not shown) to eliminate direct contact to the secondary chamber 310.
[00047] The secondary chamber 310 is disposed adjacently of the intermediate chamber 305. In a preferred embodiment, the secondary chamber 310 is disposed adjacently upward to the intermediate chamber 305. The secondary chamber 310 is provided with an inlet 310I in the front portion and is coupled to the outlet of the intermediate chamber 305 through an intermediate pipe345. In one embodiment, the outlet 305Oof the intermediate chamber 305 is disposed in proximity to the inlet305I. This provides an askew path to exhaust gas passing through the intermediate chamber 305 thereby reducing the noise. In addition, exhaust gases pass about the second catalytic converter 315 allowing oxidation of exhaust gases. Subsequently, exhaust gas passes through the perforated portion 330 reducing noise. In one embodiment, the perforated portion 330 is a cylindrical structure provided with plurality of perforations or openings provided on the circumference of the cylindrical structure.
[00048] Also, the intermediate chamber 305 of the muffler assembly extends inclinedly rearward and is disposed at a first angle a. The secondary chamber 310defines a second volume V2 is extending inclinedly rearward and is disposed at a second angle ß. At least a portion of the secondary chamber 310 is disposed adjacently of the intermediate chamber 305, when viewed from side. The intermediate chamber 305 and the secondary chamber 310 of the muffler assembly are made of a rigid material, for example any known metal.
[00049] Exhaust gases from the engine assembly 155 enter into the exhaust pipe assembly 200. The gases pass through the first catalytic converter 215, where the exhaust gases are subject to oxidation. Further, the exhaust gases enter the intermediate chamber 305 of the muffler assembly 300 and pass through the second catalytic converter 315, whereby exhaust gases are further subject to oxidation. Further, exhaust gases enter into the secondary chamber 310through the inlet 310I, which is having the volume V2. The intermediate chamber 305 and the secondary chamber 310 provided a consolidated volume of fist volume V1 and the second volume V2.
[00050] Furthermore, the secondary chamber 310 is provided with one or more baffles 330. A rear end of the secondary chamber 310 is provided with tail pipes 335. In a preferred embodiment, the baffles 330 are disposed transverse to direction of flow of exhaust gas in the secondary chamber 310 from the inlet 310I to toward the tail pipes 335. The one or more baffles330further restrict flow of exhaust gases thereby reducing noise from the muffler assembly 300. The baffles 330, which are perforated metal tubes or the like, restricts the airflow coming from the exhaust pipe assembly 200. The exhaust gases are directed into the atmosphere through the one or more tail pipe(s) 335.The secondary chamber 310 is affixed or welded to the intermediate chamber 305 and a second mounting bracket 350 is affixed to the secondary chamber310 for securing the muffler assembly 300 to the pillion foot bracket 185.
[00051] The present subject matter provides, the muffler assembly 300 provided with the second catalytic converter 315 that is disposed in the intermediate chamber 305 of the muffler assembly 300. Particularly, the second catalytic converter 315 is disposed substantially downwardly of the pillion foot bracket 185, thereby reducing the heat dissipation towards the pillion footrest 185A. Also, the second catalytic converter 315 is disposed downwardly rearward to the rider foot bracket 180A, thereby reducing heat dissipation towards the rider foot bracket 180A.
[00052] Further, the intermediate chamber 305 and the secondary chamber 310disposed at the first angle a, and the second angle ß provide consolidated volume without increasing the length of the muffler assembly 300 in longitudinal direction and without increasing the width of the vehicle 100. In one embodiment, the first angle a, and the second angle ß are acute and in range of 15-60 degrees. The intermediate chamber 305 and the secondary chamber 310 disposed at acute angle enables in directing exhaust gas away from road and at the same time to provide optimum flow for exhaust gas. Also, at least a portion of the muffler assembly 300 is having at least a portion with a height greater than the width of the muffler assembly 300thereby providing a compact layout of the muffler assembly 300.
[00053] Fig. 3 depicts a muffler assembly 300 connected to exhaust pipe assembly 400, in accordance with another embodiment of the present subject matter. The exhaust pipe assembly 400 is provided with a sensor-mounting portion 405. The sensor-mounting portion 405 is capable of accommodating an oxygen sensor or the like. The sensor-mounting portion 405 is disposed forwardly of the first mounting portion 220 of the exhaust pipe assembly 400. In other words, the senor mounting portion 405 is disposed in proximity to the first mounting portion 220 and away from the upstream end portion 205 of the exhaust pipe assembly 400. The sensor mounting portion 405 is adapted to accommodate an oxygen sensor or a temperature sensor.
[00054] It is to be understood that the aspects of the embodiments are not necessarily limited to the features described herein. Many modifications and variations of the present subject matter are possible in the light of above disclosure. Therefore, within the scope of claims of the present subject matter, the present disclosure may be practiced other than as specifically described
,CLAIMS:I/We claim:
1. A muffler assembly (300) for a two-wheeled vehicle (100), said muffler assembly (300) being connected to an internal combustion engine (155) through an exhaust pipe assembly (200, 400), said exhaust pipe assembly (200, 400) being disposed with at least one first catalytic converter (215) therein;
characterized in that,
said muffler assembly (300) comprising:
an intermediate chamber (305) connected to a downstream end portion (230) of said exhaust pipe assembly (200), and
a secondary chamber (310) connected to an outlet (305O) of said intermediate chamber (305),
said intermediate chamber (305) defines a first volume (V1) therein capable of accommodating at least one second catalytic converter (315) and a perforated portion (330) disposed downstream to said at least one catalytic converter (315), and
said secondary chamber (310) disposed adjacently above said intermediate chamber (305) defines a second volume (V2) therein provided with one or more baffles (335).
2. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said secondary chamber (310) is inclinedly disposed adjacently above said intermediate chamber (305), wherein an upper peripheral surface (USI) adjacent to said secondary chamber (310) extends inclinedly upward along a lower peripheral surface (LS) of said secondary chamber (310) forming a bend (B).
3. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said intermediate chamber (305) is having tapered lower surface (LSI) in a longitudinal direction of the vehicle (100).
4. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said intermediate chamber (305) is disposed at a first angle (a) and the secondary chamber (310) is disposed at a second angle (ß), wherein said first angle and said second are acute.
5. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said internal combustion engine (155) is mounted to a frame assembly (105) of said two-wheeled vehicle (100), and a rider foot rest (180A) and a pillion foot rest (185A) are secured to said frame assembly (105).
6. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1 or 3, wherein said intermediate chamber (305) is provided with a secondary mounting portion (320) accommodating said at least one second catalytic converter (315), and said secondary mounting portion (320) is disposed rearward of the rider footrest (180A) and below the pillion footrest (185A).
7. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said muffler assembly (300) is having a cross section with at least a portion having a height greater than a width.
8. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said outlet (305O) of said intermediate chamber (305) is in vicinity to an inlet (305I) of said intermediate chamber (305) connected to said downstream end portion (230).
9. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1, wherein said secondary chamber (310) is provided with said one or more baffles (335) are disposed transverse to direction of flow of exhaust gas.
10. The muffler assembly (300) for the two-wheeled vehicle (100) as claimed in claim 1 or 3, wherein said at least one first catalytic converter (215) is disposed about an exhaust pipe (210) of said exhaust pipe assembly (400), and a sensor mounting portion (405) is provided on said exhaust pipe (210) in proximity to said at least one first catalytic converter (215) and away from an upstream end portion (205) of said exhaust pipe assembly (400).