WO2020031213A1 - Système d'échappement - Google Patents

Système d'échappement Download PDF

Info

Publication number
WO2020031213A1
WO2020031213A1 PCT/IN2019/050590 IN2019050590W WO2020031213A1 WO 2020031213 A1 WO2020031213 A1 WO 2020031213A1 IN 2019050590 W IN2019050590 W IN 2019050590W WO 2020031213 A1 WO2020031213 A1 WO 2020031213A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas purification
exhaust gas
purification device
vehicle
exhaust
Prior art date
Application number
PCT/IN2019/050590
Other languages
English (en)
Inventor
Alok Kumar
Shailendra Kumar Pandey
Original Assignee
Hero MotoCorp Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hero MotoCorp Limited filed Critical Hero MotoCorp Limited
Priority to CN201980053499.3A priority Critical patent/CN112567114B/zh
Publication of WO2020031213A1 publication Critical patent/WO2020031213A1/fr
Priority to CONC2021/0001492A priority patent/CO2021001492A2/es

Links

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
    • 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
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/04—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the arrangement of an exhaust pipe, manifold or apparatus in relation to vehicle frame or particular vehicle parts
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to vehicles, and more particularly to an exhaust system of a vehicle.
  • a vehicle particularly vehicle configured to be ridden such as motorized scooter, motorcycle, three-wheeled vehicle, and four wheeled vehicle such as all- terrain vehicle, comprise an internal combustion engine and one or more exhaust emission gas purification devices, such as a first exhaust gas purification device and a second exhaust gas purification device.
  • the exhaust emission gas purification devices are employed to clean the exhaust gases discharged by the internal combustion engine, during operation thereof.
  • the purified exhaust gases from the exhaust gas purification devices are subsequently discharged into the atmosphere.
  • the first exhaust gas purification device is adjacent to a muffler device whereas the second exhaust gas purification device is adjacent to engine outlet.
  • the second exhaust gas purification device is provided upstream of the muffler, preferably closer to the combustion chamber, so that the catalysts contained therein can get activated quickly, whereas the second exhaust gas purification device runs along a side of the vehicle.
  • the catalyst unit is positioned below, or in the vicinity of, the engine main body.
  • exhaust gas purification device needs to have a requisite length and / or sufficient cross sectional area.
  • Increasing the length of the second exhaust gas purification device leads to increase of width of the vehicle and / or causes protrusion of components of exhaust system to an extent where likelihood of them contacting a user and causing burning issues substantially increases.
  • the muffler device and the first exhaust purification device are to be routed such that the exhaust pipe, the muffler device and the first exhaust purification device remain in a position where there is no likelihood of them contacting the user and causing burning issues.
  • This calls for having additional bents and routing one or more of the exhaust pipe, the muffler device and the first exhaust purification device, which undesirably increases cost and manufacturing complexity associated with the exhaust system.
  • a vehicle in one aspect of the present invention, includes a frame; an engine mounting system; an internal combustion engine swingably mounted to the frame through the engine mounting system; an engine cooling fan unit mounted to the internal combustion engine; and an exhaust system.
  • the exhaust system includes an exhaust pipe comprising a first bent portion, a second bent portion, and a tail pipe, a downstream end of the second bent portion fluidically connected to an upstream end of the tail pipe; a second exhaust gas purification device positioned on a downstream end of the tail pipe; a muffler device connected to the second exhaust gas purification device, wherein the second exhaust gas purification device and the muffler device are positioned along a liner axis (Ll - Ll’) of the tail pipe; and a first exhaust gas purification device connected between the first bent portion and the second bent portion.
  • the second exhaust gas purification device comprises a first end connected to a downstream end of the first bent portion, and a second end connected to an upstream end of the second bent portion.
  • the second end of the first exhaust gas purification device is positioned behind the first end of the first exhaust gas purification device.
  • This configuration of the first exhaust gas purification device enables the first exhaust gas purification device to occupy less horizontal length, and accordingly, in this configuration, space between the internal combustion engine and the swing support system can be utilized effectively for mounting exhaust gas purification device to the exhaust pipe without having to enlarge the overall width of the vehicle.
  • a line joining the second end of the first exhaust gas purification device and the first end of the first exhaust gas purification device forms an angle (a) within a range of 3 degree to 15 degree with respect to a horizontal axis (H-TG) along width of the vehicle.
  • the line (i) joining the second end and the first end of the first exhaust gas purification device forms an angle (a) of 11 degree with respect to the horizontal axis (H-H’) along width of the vehicle.
  • the second end of the first exhaust gas purification device is positioned at an offset towards exhaust port of the engine, from a longitudinal axis (L- L’) along an outer peripheral edge of the engine cooling fan unit. Moreover, the second exhaust gas purification device is positioned below the opening of the engine cooling fan unit.
  • each of the first exhaust gas purification device and the second exhaust gas purification device which are generally a very hot portion of the exhaust pipe, are arranged away from the engine cooling fan unit. Therefore, there is very less chance that the engine cooling fan unit will suck hot air around the second exhaust gas purification device, which may affect the cooling of the internal combustion engine.
  • a vehicle in one aspect of the present invention, includes a frame; an engine mounting system; an internal combustion engine swingably mounted to the frame through the engine mounting system; an engine cooling fan unit mounted to the internal combustion engine; and an exhaust system.
  • the exhaust system includes an exhaust pipe comprising a first bent portion, a second bent portion, and a tail pipe, a downstream end of the second bent portion fluidically connected to an upstream end of the tail pipe; a second exhaust gas purification device positioned on a downstream end of the tail pipe; a muffler device connected to the second exhaust gas purification device, wherein the second exhaust gas purification device and the muffler device are positioned along a liner axis (Ll - Ll’) of the tail pipe; and a first exhaust gas purification device connected between the first bent portion and the second bent portion.
  • the second exhaust gas purification device comprises a first end connected to a downstream end of the first bent portion, and a second end connected to an upstream end of the second bent portion.
  • the second end of the first exhaust gas purification device is positioned below the first end of the first exhaust gas purification device.
  • This configuration of the first exhaust gas purification device enables the first exhaust gas purification device to occupy less horizontal length, and accordingly, in this configuration, space between the internal combustion engine and the swing support system can be utilized effectively for mounting exhaust gas purification device to the exhaust pipe without having to enlarge the overall width of the vehicle.
  • a line (I - G joining the second end of the first exhaust gas purification device and the first end of the first exhaust gas purification device forms an angle (a) within a range of 3 degree to 15 degree with respect to a horizontal axis (H-TG) along width of the vehicle.
  • the line (I - G) joining the second end and the first end of the first exhaust gas purification device forms an angle (a) of 11 degree with respect to the horizontal axis (H-TT) along width of the vehicle.
  • the second end of the first exhaust gas purification device is positioned at an offset towards exhaust port of the engine, from a longitudinal axis (L- L’) along an outer peripheral edge of the engine cooling fan unit.
  • the second exhaust gas purification device is positioned below the opening of the engine cooling fan unit.
  • the position of the second exhaust gas purification device is proximate to the engine unit, facilitates easy routing of the exhaust pipe, such that there is no likelihood of the exhaust pipe etc. contacting the user and causing burning issues.
  • each of the first exhaust gas purification device and the second exhaust gas purification device which are generally a very hot portion of the exhaust pipe, are arranged away from the engine cooling fan unit. Therefore, there is very less chance that the engine cooling fan unit will suck hot air around either of the first exhaust gas purification device and the second exhaust gas purification device, which may affect the cooling of the internal combustion engine.
  • FIG. 1 is a perspective view of an exemplary vehicle, according to an embodiment of the present invention.
  • FIG. 2 is a view of a body frame of the vehicle, according to an embodiment of the present invention.
  • FIG. 3 is a bottom view of the vehicle, according to an embodiment of the present invention.
  • FIG. 4 is a bottom view of the power unit along with exhaust system of the vehicle, according to an embodiment of the present invention.
  • FIG. 5 is a front view of the power unit along with exhaust system of the vehicle, according to an embodiment of the present invention.
  • FIG. 6 is a view of the exhaust system of the vehicle, according to an embodiment of the present invention.
  • FIG. 6A is a side view of the exhaust system of the vehicle, according to an embodiment of the present invention.
  • FIG. 7 is another view of the exhaust system of the vehicle, according to an embodiment of the present invention.
  • FIG. 8A is another view bent portion and linear portion of the exhaust system of the vehicle, according to an embodiment of the present invention.
  • FIG. 8B is another view bent portion and linear portion of the exhaust system of the vehicle, according to yet another embodiment of the present invention.
  • the vehicle (100) may embody any other ridden vehicles such as scooters, three-wheeled vehicle, all-terrain vehicles (ATV) etc. without limiting the scope of the invention.
  • the vehicle (100) comprises a body frame
  • a fuel tank (not illustrated) provided below the seat (106), a utility box (105), an engine unit (300), an exhaust system (500), an engine cooling fan unit (316), a side body cover (104), a front cover (126), a leg shield (103), a lower front cover (102), a tail light (139), a headlight (123), a foot board (128), a rear suspension (not visible in figures), a rear grip (141), a rear wheel (127).
  • the body frame (200), also referred to as “frame (200)” includes a head tube (110), a main frame (112) and a pair of rear seat sub-frames (H4a), (H4b) and one or more cross frames (116), (120), and (124).
  • the main frame (112) extends downward and backward from the head tube (110) and then extends substantially horizontally.
  • the main frame (112) is provided with the cross member (124) which is connected to the rear end of the main frame (112).
  • the cross frame member (124) extends in the cross direction of the vehicle (100).
  • the cross frame member (124) supports the engine unit (300), also referred to as“internal combustion engine (300)”, or simply engine (300)”.
  • a pair of right and left rear seat sub-frames (114a) and (114b) extends rearwardly and upwardly from the ends of the cross member (124) and then approximately horizontally.
  • the rear part of the rear seat sub-frames (114a) and (114b) curves at the rear end and connected by a bracket (not shown in figure).
  • A‘U’ character- like front side crossing frame (120) is constructed over the front part of the rear seat sub-frames (114a) and (114b).
  • the rear side cross frame member (116) is constructed over the substantially middle part of the rear seat sub-frames (114a) and (114b).
  • a cross pipe (122) is provided by the upper surface of the front part of the approximately horizontal part of the main tube (112), along the cross direction, and the pair of right and left sub-frames (117a) and (117b) extend back from the both- ends side of the cross pipe (122).
  • These left and right sub-frames (117a) and (117b) are extended to back from the front in the state where it is inclined a little in a side view, they are welded on the cross member (124) forming a step floor structure (125).
  • a foot board (128) shown in Figure. 1, is disposed above the step floor structure (125).
  • the foot board (128) is disposed between the seat (130) and the head pipe (122).
  • the footboard (128) is positioned lower than the seat (130).
  • the foot board (128) is the component on which the rider puts his/her feet.
  • a first U-shaped frame tube (118a) extends obliquely downward and rearward, the front ends of which is welded to the left rear seat sub-frames (114a) at a position near the front side cross frame (120).
  • a second U-shaped frame tube (118b) extends obliquely downward and rearward, the front ends of which are welded to the right sub-frames (H4b) at a position near the front side cross frame (120).
  • the first and second U- shaped frame tubes (118a) and (118b) are used for mounting a foot peg (328).
  • the head tube (110) is steerably connected to the front fork (121) and a front wheel (108) is attached to a lower end of the front forks (121 a, 121 b).
  • a handlebar (107) is attached to an upper end of the head tube (110).
  • Ahead light (123) is arranged in front of the handlebar (107).
  • a front fender (109) is provided so as to cover an upper portion of the front wheel (108).
  • a seat (106) on which the rider straddles is supported by rear seat sub frames (H4a) and (H4b).
  • the leg shield (103) that protects legs of a rider is provided on the front side.
  • a centre frame cover is provided behind the leg shield (103).
  • a tail light (139) and a rear fender (111) are provided at a rear portion of the side frame cover (104).
  • a fuel tank (not illustrated) is arranged under the seat (106) inside the side frame cover (104).
  • the front cover (126) and a lower front cover (102) forms the front cover portion of the vehicle (100).
  • the fuel tank (not illustrated) is mounted in the space between rear end portion of the rear seat sub-frames (1 l4a, 1 l4b) and the rear side crossing frame (116), as illustrated in Figure 2.
  • the rear side crossing frame (116) has one or more mounting means such as bracket and the like, for mounting the fuel tank.
  • An engine unit (300) is arranged downwardly in front of the fuel tank. [00043] The engine unit (300), as illustrated in the Figure 1 to Figure 6, and
  • Figure 6A is a casing which houses a power unit, a transmission unit and a reduction unit.
  • the engine unit (300) is internally partitioned into chambers, as the power unit chamber (202), the transmission chamber (204) and the reduction chamber (210).
  • the power unit chamber (202) and the transmission chamber (204) are disposed side by side and the reduction chamber (210) is disposed rearward of the transmission unit
  • the engine unit (300) is a single-cylinder, four-stroke- cycle and forced-air-cooling internal combustion engine.
  • the engine unit (300) comprises a crankcase (214), a cylinder block (313) attached to the front end of the crankcase (214), a cylinder head (312) attached to the cylinder block (313), and a head cover (311) for covering a front opening in the cylinder head (312).
  • the power unit (202) is disposed in the vehicle (100) in substantially horizontal position with head cover (311) positioned towards the front wheel of the vehicle (100).
  • the single cylinder air-cooled engine projectingly provided on the body frame (200) is included, and is disposed in a manner that the cylinder axis of the power unit (202) becomes substantially horizontal along the front and rear direction of the vehicle (100).
  • the crankcase (214) includes a crankshaft (not illustrated) which extends in the left-right direction of the vehicle (100).
  • the crankshaft is connected to a piston.
  • a generator/alternator (not shown in figure) is provided on the right end of the crankshaft.
  • the engine cooling fan unit (316) is mounted to right side of the crankshaft.
  • the engine cooling fan unit (316) includes an outer peripheral edge (316a) and a fan cover having plurality of fins cover the right-side portion of the engine cooling fan. Air in the power unit (202) is sucked into by means of the engine cooling fan unit (316) being driven by the crankshaft. The engine cooling fan unit (316) is adapted to suck air from the outside and throw the air into the power unit (202) to cool the cylinder block (313) and other component in the engine unit (300). [00046]
  • the cylinder head (312) includes an intake port (not visible in figures) and an exhaust port (321).
  • the exhaust port (321) is provided a cylinder head wall which is facing ground in the vehicle layout.
  • the intake port is provided in another wall of the cylinder head opposite to the exhaust port (321).
  • the engine unit (300) has an air cleaner (317) mounted on the upper surface side of the transmission chamber (204) positioned on the rear side of the vehicle (100), and has a throttle device (323) joined to the front of the above air cleaner (317).
  • An intake pipe (not shown in figure) extends forward from the throttle body (323), and a mixed air is supplied to the engine unit (300) through the above intake pipe.
  • the transmission chamber (204) includes a V-belt around a drive pulley, which is mounted to a left end of the crankshaft, and a driven pulley, which is mounted to a driven shaft.
  • the engine unit (300) rotatably supports a rear wheel (127) via the transmission chamber (204) and the reduction chamber (210) on the rear side of the vehicle (100).
  • the throttle device (323) may be a carburetor or a throttle body.
  • the intake pipe communicates with an intake port in the cylinder head (312), and through an intake passage, the purified air or the air-fuel mixture is supplied to the intake port in the cylinder head (312) from the air cleaner (317) via the throttle device (323).
  • the engine unit (300) includes an exhaust system (500) comprising an exhaust pipe (301), the muffler device (307), an first exhaust gas purification device (320), an oxygen detector (310).
  • the exhaust pipe (301) is connected to the downstream end of the exhaust port (321).
  • the muffler device (307) is provided with a discharge port (324) which is exposed to the atmosphere.
  • the muffler device (307) is connected to the exhaust pipe (301) and allows the exhaust gas flowing from the downstream end of the exhaust pipe (301) to flow to the discharge port (324).
  • the muffler device (307) is configured to restrain sound generated by the exhaust gas.
  • the exhaust system (500) further includes a second, an additional exhaust gas purification device such as catalyst.
  • the oxygen detector (310) is provided upstream of the exhaust gas purification device (320a) such as catalyst.
  • the engine unit (300) is supported by the body frame (200) in a swingable manner by an engine mounting system (400), also referred to as a swing support system (400).
  • the swing support system (400) includes a right link arm (133R), a left link arm (133L), a right engine side bracket (134R), and a left engine side bracket (134L).
  • the swing support system (400) further includes a pivot shaft (132).
  • the pivot shaft (132) includes two first pivot shafts namely a first pivot shaft (132R) and a first pivot shafts (132L), collectively referred to as first pivot shafts
  • a bracket (135R) is fixed to a position in the vicinity of a right end portion of the cross frame member (124).
  • a bracket (135L) is fixed to a position in the vicinity of a left end portion of the cross frame member (124).
  • the brackets (135R) and (135L) extend rearward from the cross frame member (124).
  • the right link arm (133R) is swingably connected to the bracket (135R) via the right engine support means (131R).
  • the left link arm (133L) is swingably connected to the bracket (135L) via the left engine support means (131L).
  • the right link arm (133R) and the left link arm (133L) are swingably supported by the body frame (200).
  • the right and left engine support means (131R) and (131L) is left and right end of a single shaft having a bolt at each left and right ends.
  • the right and left engine support means (131R) and (131L) are separate shaft each of these include a bolt.
  • the first pivot shafts (132R) and (132L) extend in the left-right direction.
  • the first pivot shaft (132R) and the first pivot shaft (132L) are provided to be coaxial.
  • the right link arm (133R) and the left link arm (133L) are formed to be symmetrical in the left-right direction.
  • the right engine side bracket (134R) and the left engine side bracket (134L) constitute a part of the engine unit (300).
  • the right engine side bracket (134R) and the left engine side bracket (134L) constitute a part of the engine unit (300).
  • the right engine side bracket (134R) and the left engine side bracket (134L) constitute a part of the engine unit (300).
  • the right engine side bracket (134R) and the left engine side bracket (134L) constitute a part of the engine unit (300).
  • the right engine side bracket (134R) is provided at a right end of a lower part of the engine unit (300).
  • the left engine side bracket (134L) is provided at a left end of the lower part of the engine unit (300).
  • the right engine side bracket (134R) and the left engine side bracket (134L) are formed to be substantially symmetrical in the left-right direction.
  • the right engine side bracket (134R) and the left engine side bracket (134L) extend frontward.
  • a front end portion of the right engine side bracket (134R) is connected to the right link arm (133R) via a right engine support means (131R).
  • a front end portion of the left engine side bracket (134L) is swingably connected to the left link arm 133L via a left engine support means (131L).
  • the right engine side bracket 134R and the left engine side bracket (134L) are swingably connected to the right link arm (133R) and the left link arm (133L), respectively. Owing to such connections, the engine unit (300) is allowed to swing about the first pivot shafts (132R) and (132L).
  • the right and left engine support means (131R) and (131L) extend in the left- right direction.
  • the right and left engine support means (131R) and (131L) are provided to be coaxial. [00055] In an embodiment, the right and left engine support means (131R) and
  • the right and left engine support means (131R) and (131L) are provided rearward of the first pivot shafts (132R) and (132L).
  • the right link arm (133R), the left link arm (133L), the first pivot shafts 132R, (132L) and the right and left engine support means (131R), (131L) together forms an integrated unit.
  • the exhaust port (321) lies between the right link arm (133R) and the left link arm (133L) when viewed from the bottom side as shown in Figures 3 and Figure 4.
  • the exhaust pipe (301) is connected to the downstream end of the exhaust port (321).
  • the exhaust pipe (301) includes a first bent portion (302), a second bent portion (303), and a tail pipe (330).
  • a linear portion (304) is connected to the second bent portion (303).
  • the exhaust gas purification device (320) connects the first bent portion (302) and the second bent portion (303).
  • the exhaust gas purification device (320) is embodied as a linear portion (304) that connects the first bent portion (302) and the second bent portion (303).
  • the upstream end of the first bent portion (302) has a flange (not numbered) communicatively connected to the exhaust port (321).
  • the first bend portion (302) is extended downward and sideward from the exhaust port (321) substantially in the width direction of the vehicle (100).
  • the first bend portion (302) is connected to upstream end of the linear portion (304).
  • the first bent portion (302) of the exhaust pipe (301) is disposed in between the exhaust port (321) and the right and left link arms (133R), (133L), when viewed in up and down direction of the vehicle (100).
  • both the first bent portion (302) and the exhaust gas purification device (320) of the exhaust pipe (301) may be disposed in between the exhaust port (321) and the right and left link arms (133R), (133L), when viewed in up and down direction of the vehicle (100).
  • the linear portion (304) of the exhaust pipe (301) extends substantially in the width direction of the vehicle (100).
  • the second exhaust gas purification device (320) is provided in the linear portion (304) of the exhaust pipe (301).
  • the second exhaust gas purification device (320) is embodied as the linear portion (304) of the exhaust pipe (301).
  • the first bent portion (302) of the exhaust pipe (301) is disposed in between the first pivot shafts (132R), (132L) and the right and left engine support means (131R), (131L), when viewed in frontward and rearward direction of the vehicle (100).
  • the exhaust gas purification device (320) of the exhaust pipe (301) extends at an angle to a longitudinal direction of the vehicle (100). In an embodiment, the exhaust gas purification device (320) of the exhaust pipe (301) extends substantially in the width direction of the vehicle (100).
  • the upstream end of the second bend portion (303) is connected to the downstream end of the exhaust gas purification device (320). Further, the upstream end of the second bend (303) extends in the rearward direction while bending such that the downstream end of the tail pipe (330) is connected to the muffler device (307).
  • the muffler device (307) is arranged in its longitudinal direction almost along a forward and rearward direction of the vehicle (100). As illustrated, the second exhaust gas purification device (320a) and the muffler device (307) are positioned along a liner axis (Ll - Ll’) of the tail pipe (330).
  • each of the first exhaust gas purification device (320), and the second exhaust gas purification device (320a) may be catalytic converters.
  • each of the first exhaust gas purification device (320), and the second exhaust gas purification device (320a) may be a three-way catalyst.
  • the three way catalyst may be a honeycomb structure or any other suitable structure for catalyst having a coatings of metal such as platinum, palladium, rhodium and the like metal combination thereof. These configuration, by way of example, not limited to this, may be in other configurations.
  • the second exhaust gas purification device (320) of the exhaust pipe (30) is in fluidic communication with the exhaust gases discharge from the exhaust port (321).
  • the first bent portion (302) is formed by joining two half shell structure at the respective peripheral ends to form a hollow pipe structure having substantially uniform diameter.
  • the first bent portion (302) is a hollow pipe structure communicatively connected to the exhaust port (321) at one end.
  • the exhaust purification device (320) is fluidically connected to the first bent portion (302).
  • the linear portion (304) is constituted by a holder (326) and a pair of cones (305), (306).
  • the exhaust gas purification device (320) is provided in the holder (326).
  • the pair of cones (305), (306) includes an upstream cone (305) and a downstream cone (306).
  • the downstream end of the first bent portion (302) is connected to the holder (326) via the upstream cone (305). Further, the upstream end of the second bent portion (303) is connected to the holder (326) via the downstream cone (306).
  • the exhaust gas discharge from the exhaust port (321) passes through the first bent portion (302), the linear portion (304) and the third bent portion (303) to reach the muffler device (307) and finally exit into the atmosphere from the exit end (324) of the muffler device (307).
  • the linear portion (304) is a hollow pipe (327) and the exhaust gas purification device (320) is provided in the hollow pipe (327).
  • the exhaust purification device (320) is provided in the hollow pipe (327) that constitutes the linear portion (304), and between the first bent portion (302) and the second bent portion (303) of the exhaust pipe (301).
  • the distance between the longitudinal axis YY’ of the oxygen detector (310) and the central axis XX’ of the upstream end of the first bent portion (302) is smaller than the distance between the longitudinal axis YY’ of the oxygen detector (310) and the upstream edge of the exhaust gas purification device (320).
  • both the oxygen detector (310) and the exhaust gas purification device (320) can be arranged very compactly within first bent portion (302) and the linear portion (304) in the width direction of the vehicle (100).
  • the oxygen detector (310) overlaps with the exhaust gas purification device (320) when viewed along the downstream end of the linear portion (304) of the exhaust pipe (301). Also, the emission can be controlled easily as the activation temperature of the oxygen detector (310) and the exhaust gas purification device (320) can be reached very quickly due to their proximity with the exhaust port (321).
  • the exhaust gas purification device (320) of the exhaust pipe (301) is arranged in such a way that the rear end of the second exhaust gas purification device (320) at the downstream end of the linear portion (304) is substantially within the outer boundary of the engine cooling fan unit (316) when viewed from the front side of the engine unit (300).
  • the second exhaust gas purification device (320) comprises a first end (305a) connected to a downstream end of the first bent portion (302), and a second end (306a) connected to an upstream end of the second bent portion (303).
  • the exhaust gas purification device (320) which is generally a very hot portion of the exhaust pipe (301), is arranged away from the engine cooling fan unit (318).
  • the engine cooling fan unit (318) will suck hot air around the exhaust gas purification device (320) which may affect the cooling of engine unit (300).
  • at least a portion of the exhaust gas purification device (320) is arranged between the exhaust port (321) and one of the right link arm (133R) and left link arm (133L) when viewed from bottom side of the vehicle (100).
  • the exhaust gas purification device (320) overlaps with one of the right link arm (133R) and left link arm (133L) when viewed from bottom side of the vehicle (100).
  • the exhaust gas purification device (320) is arranged in the vicinity of the engine unit (300) and is more close to the exhaust port (321), therefore, temperature of the exhaust gas purification device (320) can easily reach the activation temperature due to heat from exhaust gases coming out from the exhaust port (321) of the engine unit (300), for example, even in the cold state immediately after the start of travel, the exhaust gas mixture gets heated to a relatively short time to activate the exhaust gas purification device (320) quickly.
  • the exhaust gas purification device (320) is disposed at a position higher than, or above, the swing support system (400).
  • the exhaust gas purification device (320) is disposed at a position higher than, or above the right link arm (133R) of the swing support system (400).
  • the exhaust gas purification device (320) may be disposed at a position higher than, or above the left link arm (133L) of the swing support system (400), without deviating from the spirit of the present disclosure.
  • the exhaust gas purification device (320) is positioned behind the first end (305a) of the first exhaust gas purification device (320).
  • the second end (306a) of the first exhaust gas purification device (320) is at a height H2 from a ground surface (S)
  • the swing support system (400) is positioned at a height Hl from the first end (305a) of the first ground surface (S), wherein H2 is greater than Hl.
  • This inclined configuration of the first exhaust gas purification device (320) enables the first exhaust gas purification device (320) to occupy less horizontal length, accordingly, in this configuration, space between the engine unit (300) and the swing support system (400) can be utilized effectively for mounting exhaust gas purification device (320) to the exhaust pipe (301) without having to enlarge the overall width of the vehicle (100).
  • a line (i) joining the second end (306a) of the first exhaust gas purification device (320) and the first end (305a) of the first exhaust gas purification device (320) forms an angle (a) within a range of 3 degree to 15 degree with respect to a horizontal axis (H-H’) along width of the vehicle (100).
  • the line (i) joining the second end (306a) of the first exhaust gas purification device (320) and the first end (305a) of the first exhaust gas purification device (320) forms an angle (a) of 11 degree respect to a horizontal axis (H-H’) along width of the vehicle (100).
  • exhaust gases are discharged from the exhaust pipe (301) from the combustion chamber in the cylinder head (312) via the exhaust port (321).
  • the exhaust gases pass through the inside of the first bent portion (302) of the exhaust pipe (301) to flow into the second exhaust gas purification device (320) provided on the exhaust pipe (301).
  • the second exhaust gas purification device (320) of the exhaust pipe (301) is heated by the exhaust gases and thereby early activation is achieved, and the exhaust gases further pass through the second bent portion (303) of the exhaust pipe (301) and the muffler device (307) to be discharged from exit (324) of the muffler device (307) into the atmosphere.
  • the second exhaust gas purification device (320) As the second exhaust gas purification device (320) is arranged in the vicinity of the engine unit (300) and more close to the exhaust port (321), therefore, temperature of the second exhaust gas purification device (320) can easily reach the activation temperature due to heat from exhaust gases coming out from the exhaust port (321) of the engine unit (300), for example, even in the cold state immediately after the start of travel, the exhaust gas mixture was heated to a relatively short time to activate the second exhaust gas purification device (320) quickly.
  • the second end (306a) of the first exhaust gas purification device (320) is positioned at an offset towards exhaust port of the engine, from a longitudinal axis
  • the second exhaust gas purification device (320a) is positioned below the opening of the engine cooling fan unit (316). Therefore, as the second exhaust gas purification device (320) is arranged away from the engine cooling fan unit (316), there is very less chance that the engine cooling fan unit (316) will suck hot air around the second exhaust gas purification device (320) which may affect the cooling of engine unit (300). In particular, at least a portion of the exhaust gas purification device (320) is positioned below a cylinder block (313) of the internal combustion engine (300). [00073] In addition, the position of the second exhaust gas purification device
  • the exhaust gas purification device (320) is arranged immediately below the engine unit (300) and substantially in the middle of the vehicle (100) therefore lowering gravity center position, thus optimizing the weight balance of the vehicle (300).
  • the present invention provides the vehicle (100) that allows positioning of the exhaust gas purification device (320) proximate to the engine unit (300) and the exhaust port (321), thereby allowing the temperature of the exhaust gas purification device (320) to quickly reach the activation temperature due to heat from exhaust gases coming out from the exhaust port (321) of the engine unit
  • the present invention provides the vehicle (100) having the exhaust gas purification device (320) and the exhaust pipe (301) positioned at a height above the engine mounting system (400). Owing to such positioning of the exhaust gas purification device (320) and the exhaust pipe (301), the exhaust gas purification device (320) and the exhaust pipe (301) have considerable clearance from the ground and are above each of the right link arm (133R) and the left link arm (133L).
  • each of the first bent portion (302) and the linear portion (304) of the exhaust pipe (301) are disposed in between the first pivot shafts (132R), (132L) and the right and left engine support means (131R), (131L), while the each of the first bent portion (302) and the linear portion (304) of the exhaust pipe (301) are disposed at an height

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

Selon un aspect, la présente invention concerne un véhicule (100). Le véhicule (100) comprend un châssis (200) ; un système de montage de moteur (400) ; un moteur à combustion interne (300) monté de façon oscillante sur le châssis à travers le système de montage de moteur (400) ; une unité de ventilateur de refroidissement de moteur (316) ; et un système d'échappement (500) en communication fluidique avec le moteur à combustion interne (300). Le système d'échappement (500) comprend un tuyau d'échappement (301), un second dispositif de purification de gaz d'échappement (320a), un dispositif de silencieux (307), et un premier dispositif de purification de gaz d'échappement (320). Le premier dispositif de purification de gaz d'échappement (320) est relié entre une première partie courbée (302) et une seconde partie courbée (303). Une seconde extrémité du premier dispositif de purification de gaz d'échappement (320) est positionnée derrière une première extrémité du premier dispositif de purification de gaz d'échappement (320).
PCT/IN2019/050590 2018-08-10 2019-08-09 Système d'échappement WO2020031213A1 (fr)

Priority Applications (2)

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CN201980053499.3A CN112567114B (zh) 2018-08-10 2019-08-09 排气系统
CONC2021/0001492A CO2021001492A2 (es) 2018-08-10 2021-02-09 Sistema de escape

Applications Claiming Priority (2)

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IN201811030216 2018-08-10
IN201811030216 2018-08-10

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WO2020031213A1 true WO2020031213A1 (fr) 2020-02-13

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PCT/IN2019/050589 WO2020031212A1 (fr) 2018-08-10 2019-08-09 Système d'échappement

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WO2021234665A1 (fr) * 2020-05-22 2021-11-25 Briggs & Stratton, Llc Petit moteur à refroidissement par air doté de convertisseur catalytique à catalyseur au ruthénium

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EP3165742A1 (fr) * 2014-07-04 2017-05-10 Yamaha Hatsudoki Kabushiki Kaisha Véhicule et unité de moteur à quatre temps monocylindre

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021234665A1 (fr) * 2020-05-22 2021-11-25 Briggs & Stratton, Llc Petit moteur à refroidissement par air doté de convertisseur catalytique à catalyseur au ruthénium
CN115702283A (zh) * 2020-05-22 2023-02-14 布里格斯斯特拉顿有限责任公司 具有带有钌催化剂的催化转换器的小型空气冷却式发动机

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CO2021001486A2 (es) 2021-03-08
CN112567114B (zh) 2022-08-02
CN112567115B (zh) 2023-03-14
CN112567115A (zh) 2021-03-26
WO2020031212A1 (fr) 2020-02-13
CN112567114A (zh) 2021-03-26
CO2021001492A2 (es) 2021-04-19

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