US20120160601A1 - Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same - Google Patents
Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same Download PDFInfo
- Publication number
- US20120160601A1 US20120160601A1 US12/979,699 US97969910A US2012160601A1 US 20120160601 A1 US20120160601 A1 US 20120160601A1 US 97969910 A US97969910 A US 97969910A US 2012160601 A1 US2012160601 A1 US 2012160601A1
- Authority
- US
- United States
- Prior art keywords
- exhaust pipe
- cylinder
- pipe cover
- cover
- engine
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 238000003466 welding Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 238000005192 partition Methods 0.000 description 7
- 230000004308 accommodation Effects 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having thermal insulation
-
- 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
- F01N13/14—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 having thermal insulation
- F01N13/141—Double-walled exhaust pipes or housings
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles
Definitions
- the present invention relates to an exhaust device of a vehicle and a straddle-type four-wheeled vehicle provided with the exhaust device.
- an exhaust pipe extends from a front surface of a cylinder of an engine to a muffler while passing through an outer side of the engine in a lateral direction, and the outer side of the exhaust pipe in the lateral direction is uniformly covered by an exhaust pipe cover.
- the exhaust device of a vehicle includes a muffler disposed in a rear part of the vehicle, an exhaust pipe extending from a front surface of a cylinder of an engine to the muffler while passing through an outer side of the engine in the lateral direction, a first exhaust pipe cover covering an entire periphery of an exhaust pipe front portion located near the outer side of the engine in the lateral direction, and a second exhaust pipe cover covering an outer side of an exhaust pipe rear portion located behind the engine in the lateral direction.
- the heat influence from the exhaust pipe is reduced.
- the amount of the exhaust pipe cover can be reduced.
- the first aspect of the present invention has the following configurations.
- the first exhaust pipe cover is formed by a pair of half members, and the second exhaust pipe cover has a substantially U-shaped cross section.
- the first exhaust pipe cover and the second exhaust pipe cover have a gap between themselves and an outer peripheral surface of the exhaust pipe, and the first exhaust pipe cover and the second exhaust pipe cover are in contact with the outer peripheral surface and fixed by a support member at three locations, which are a front part, an intermediate part and a rear part in the longitudinal direction of the vehicle.
- the exhaust pipe has a bent part at one location in a portion covered by the first exhaust pipe cover.
- the exhaust pipe has a bent part at one location in a portion covered by the second exhaust pipe cover.
- the first exhaust pipe cover which covers the entire periphery of the exhaust pipe front portion can easily be mounted on the exhaust pipe.
- the second exhaust pipe cover which covers the outer side of the exhaust pipe rear portion in the lateral direction can easily be formed.
- the first exhaust pipe cover and the second exhaust pipe cover have the gap between themselves and the exhaust pipe, the heat influence from the exhaust pipe can be reduced, and the temperature rise of the first exhaust pipe cover and the second exhaust pipe cover can be suppressed.
- the first exhaust pipe cover and the second exhaust pipe cover are in contact with the outer peripheral surface of the exhaust pipe and fixed by the support member at the three locations, which are the front part, the intermediate part and the rear part. Therefore, the first exhaust pipe cover and the second exhaust pipe cover are reliably supported by the exhaust pipe with the gap between themselves and the exhaust pipe.
- the first exhaust pipe cover is located along the bent part of the exhaust pipe, and the first exhaust pipe cover is easily supported by the exhaust pipe.
- the second exhaust pipe cover is located along the bent part of the exhaust pipe, and the second exhaust pipe cover is easily supported by the exhaust pipe.
- a second aspect of the present invention provides a straddle-type four-wheeled vehicle having the exhaust device of the first aspect of the present invention.
- a portion of the exhaust pipe covered by the exhaust pipe cover can be rationalized.
- FIG. 1 is a left side view of a straddle-type all-terrain four-wheeled vehicle according to an embodiment of the present invention
- FIG. 2 is a perspective view of a body frame, an engine and an exhaust device of the vehicle shown in FIG. 1 ;
- FIG. 3 is a left side view of the body frame, the engine and the exhaust device shown in FIG. 2 ;
- FIG. 4 is a plan view of the body frame, the engine and the exhaust device shown in FIG. 2 ;
- FIG. 5 is a plan view of a portion connecting a front-cylinder exhaust pipe and a rear-cylinder exhaust pipe to a muffler;
- FIG. 6 is a side view of FIG. 5 ;
- FIG. 7 is a partial enlarged view of a curved portion of the front-cylinder exhaust pipe
- FIG. 8 is a front view of the curved portion shown in FIG. 7 ;
- FIG. 9 is a sectional view taken along line IX-IX in FIG. 8 ;
- FIG. 10 is a sectional view taken along line X-X in FIG. 9 ;
- FIG. 11 is a side view of a first exhaust pipe cover
- FIG. 12 is a plan view of FIG. 11 , and shows one of half members
- FIG. 13 is a diagram showing a state where the first exhaust pipe cover is mounted on a front portion of an exhaust pipe of the front-cylinder exhaust pipe;
- FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13 ;
- FIG. 15 is a sectional view taken along line XV-XV in FIG. 13 ;
- FIG. 16 is a side view of a second exhaust pipe cover
- FIG. 17 is a front view of the second exhaust pipe cover shown in FIG. 16 ;
- FIG. 18 is a diagram showing a state where the second exhaust pipe cover is mounted on a rear portion 134 of the exhaust pipe of the front-cylinder exhaust pipe 13 ;
- FIG. 19 is a sectional view taken along line XIX-XIX in FIG. 18 ;
- FIG. 20 is a sectional view taken along line XX-XX in FIG. 18 ;
- FIG. 21 is a side view of a third exhaust pipe cover
- FIG. 22 is a front view of the third exhaust pipe cover 95 shown in FIG. 21 ;
- FIG. 23 is a vertical enlarged sectional view of the muffler.
- FIGS. 1 to 23 show a straddle-type all-terrain four-wheeled vehicle (ATV) and an exhaust device according to an embodiment of the present invention, and the present embodiment will be described based on these drawings.
- ATV all-terrain four-wheeled vehicle
- FIGS. 1 to 23 show a straddle-type all-terrain four-wheeled vehicle (ATV) and an exhaust device according to an embodiment of the present invention, and the present embodiment will be described based on these drawings.
- ATV all-terrain four-wheeled vehicle
- FIG. 1 is a left side view of the straddle-type all-terrain four-wheeled vehicle according to the embodiment of the present invention.
- a pair of left and right front wheels 1 and a pair of left and right rear wheels 2 are provided in a front part and a rear part of a body frame F, a two-cylinder V-engine 3 is installed between the front and rear wheels 1 and 2 .
- a steering handle 5 is provided on a front part of an upper portion of the body frame F, and a straddle-type seat 6 is provided behind the steering handle 5 .
- the two-cylinder V-engine 3 is provided with a front cylinder 10 tilted forward and a rear cylinder 11 tilted rearward on the upper side of a crankcase 8 .
- An exhaust port 12 is formed in a front wall of the front cylinder 10 , a front-cylinder exhaust pipe 13 is connected to the exhaust port 12 , an exhaust port 14 is formed in a rear wall of the rear cylinder 11 , and a rear-cylinder exhaust pipe 15 is connected to the exhaust port 14 .
- a single muffler 16 that is common for the front and rear cylinders is disposed on a rear part of the body frame F, and the muffler 16 is located between the body frame F and the left rear wheel 2 .
- FIG. 2 is a perspective view of the body frame F, the engine 3 and the exhaust device.
- the following members are integrally formed together by welding: i.e., a pair of left and right upper part pipes 21 extending in a longitudinal direction, a pair of left and right lower part pipes 22 extending in the longitudinal direction, first front part pipes 23 which couple front ends of the upper part pipes 21 and the lower part pipes 22 to each other, second front part pipes 24 which are disposed behind the first front part pipes 23 with a fixed distance therefrom and which couple the upper part pipes 21 and the lower part pipes 22 to each other, and a plurality of cross pipes 26 and 27 which couple the left and right upper part pipes 21 and the left and right lower part pipes 22 to each other.
- a rising pipe 29 extending forward and upward is integrally formed on a rear end of each of the lower part pipes 22 , and an upper end of the rising pipe 29 is coupled to the upper part pipe 21 by welding.
- a rear part support pipe 28 extending rearward is fixed to a rear end of each of the lower part pipes by welding, a rear end of the rear part support pipe 28 is coupled to lower ends of a pair of left and right rear part pipes 30 extending in the vertical direction, and the upper part of the rear part pipe 30 is coupled to a rear part of the upper part pipe 21 .
- the engine 3 is installed within a range surrounded by the upper part pipes 21 and the lower part pipes 22 , and the muffler 16 is mounted on the rear part of the left upper part pipe 21 through a muffler mounting device 32 .
- FIG. 3 is a left side view of the body frame F, the engine 3 and the exhaust device shown in FIG. 2 .
- a front-cylinder exhaust pipe connection port 41 and a rear-cylinder exhaust pipe connection port 42 are formed side by side in the vertical direction on a front wall 40 of the muffler 16 .
- a joint tube 43 protruding forward is integrally welded to the rear-cylinder exhaust pipe connection port 42 on the lower side, a rear end of the rear-cylinder exhaust pipe 15 is detachably inserted into the joint tube 43 , and fastened by a fastening band 45 .
- a joint tube 44 protruding forward is integrally welded to the front-cylinder exhaust pipe connection port 41 on the upper side, and a rear end of the front-cylinder exhaust pipe 13 is detachably inserted into the joint tube 44 , and fastened by a fastening band 46 .
- FIG. 4 is a plan view of the body frame F, the engine 3 and the exhaust device shown in FIG. 2 .
- the rear-cylinder exhaust pipe 15 extends diagonally leftward and rearward from the exhaust port 14 opening in the rear wall of the rear cylinder 11 , the rear-cylinder exhaust pipe 15 protrudes leftward from the body frame F at a rear position of the left rising pipe 29 , extends rearward on the left side of the left upper part pipe 21 and the left rear part support pipe 28 and reaches the muffler 16 .
- the front-cylinder exhaust pipe 13 extends leftward in a curved shape in the curved portion 13 a from the exhaust port 12 which opens in the front wall of the front cylinder 10 , and the front-cylinder exhaust pipe 13 is folded back rearward in a right direction (inward in the lateral direction) of the left second front part pipe 24 as shown in FIG. 2 .
- An electric power steering motor 7 which assists a steering force of the steering handle 5 is provided in a lower portion of a shaft (not shown) of the steering handle 5 .
- the curved portion 13 a is located rearward with a fixed space from the motor 7 . As shown in FIGS.
- the front-cylinder exhaust pipe 13 extends rearward substantially along the left upper part pipe 21 as viewed from above while keeping a fixed space in the lateral direction from a left surface of the front cylinder 10 , a left surface of the rear cylinder 11 and throttle bodies 10 a and 11 a of the engine 3 . More specifically, the front-cylinder exhaust pipe 13 is disposed such that, in an outer side of the engine 3 in the lateral direction, an inner end of the front-cylinder exhaust pipe 13 in the lateral direction is located inward in the lateral direction as compared with an outer end of the upper part pipe 21 in the lateral direction.
- the front-cylinder exhaust pipe 13 is superposed on the rear-cylinder exhaust pipe 15 in the vertical direction above the rear-cylinder exhaust pipe 15 at a rear position of the left rising pipe 29 and a front position of the left rear part support pipe 28 . Thereafter, the front-cylinder exhaust pipe 13 extends rearward on the left side of the left upper part pipe 21 and the left rear part support pipe 28 , and reaches the muffler 16 which is the muffler 16 that the rear-cylinder exhaust pipe 15 reaches. As shown in FIG. 4 , the front-cylinder exhaust pipe 13 is located outward (leftward) in the lateral direction with respect to the rear-cylinder exhaust pipe 15 behind the engine 3 . As shown in FIGS. 3 and 4 , a connecting portion of the front-cylinder exhaust pipe 13 to the muffler 16 and a connecting portion of the rear-cylinder exhaust pipe 15 to the muffler 16 are arranged side by side in the vertical direction.
- FIG. 5 is a plan view of a portion which connects the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 to the muffler 16
- FIG. 6 is a side view thereof.
- the connecting portion of the front-cylinder exhaust pipe 13 to the muffler 16 and the connecting portion of the rear-cylinder exhaust pipe 15 to the muffler 16 are arranged side by side in the vertical direction.
- front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are arranged side by side in the vertical direction in front of the muffler 16 , it is necessary to deviate, from each other, a longitudinal position of the fastening band 46 where the front-cylinder exhaust pipe 13 is fastened to the joint tube 44 and a longitudinal position of the fastening band 45 where the rear-cylinder exhaust pipe 15 is fastened to the joint tube 43 .
- a curvature of the front-cylinder exhaust pipe 13 in front of the fastening band 46 is made larger than a curvature of the rear-cylinder exhaust pipe 15 in front of the fastening band 45 .
- the front-cylinder exhaust pipe 13 is located outward (leftward) in the lateral direction with respect to the rear-cylinder exhaust pipe 15 behind the engine 3 .
- FIG. 7 is a partial enlarged view of the curved portion 13 a of the front-cylinder exhaust pipe 13 .
- the curved portion 13 a includes a pair of upper and lower half members 13 a 1 and 13 a 2 .
- the front-cylinder exhaust pipe 13 is divided into a front end portion 131 and a front part 132 .
- the exhaust upstream end 131 a of the front end portion 131 is connected to the exhaust port 12 shown in FIG. 4 , and the exhaust downstream end 131 b of the front end portion 131 is inserted into a first opening 13 a 3 of the curved portion 13 a .
- the exhaust upstream end 132 a of the front part 132 is inserted into a second opening 13 a 4 of the curved portion 13 a.
- FIG. 8 is a front view of the curved portion 13 a shown in FIG. 7 .
- the half members 13 a 1 and 13 a 2 are bonded to each other by welding in the vertical direction, and by the welding and bonding of the half members 13 a 1 and 13 a 2 , the front end portion 131 is fixed to the first opening 13 a 3 by welding, and the front part 132 is fixed to the second opening 13 a 4 by welding.
- FIG. 9 is a sectional view taken along line IX-IX in FIG. 8 .
- FIG. 10 is a sectional view taken along line X-X in FIG. 9 .
- the upper and lower half members 13 a 1 and 13 a 2 have the same shapes.
- An angle ⁇ formed between a center line of the first opening 13 a 3 and a center line of the second opening 13 a 4 is about 45°, and by inserting the front end portion 131 into the first opening 13 a 3 and inserting the front part 132 into the second opening 13 a 4 , the front-cylinder exhaust pipe 13 can extend in a curved shape leftward at the curved portion 13 a and can be folded back rearward.
- the front-cylinder exhaust pipe 13 can be folded back rearward in the right direction (inward in the lateral direction) of the left second front part pipe 24 .
- the front-cylinder exhaust pipe 13 After the front-cylinder exhaust pipe 13 is folded back rearward in the right direction of the second front part pipe 24 as shown in FIG. 3 , the front-cylinder exhaust pipe 13 extends diagonally upward, passes through a portion near a left surface of the front cylinder 10 in a rearward and upward tilted attitude, the front-cylinder exhaust pipe 13 is bent slightly rearward and downward at a central portion of a V-bank between both the cylinders 10 and 11 , and passes through a portion near the left surface of the rear cylinder 11 .
- the front-cylinder exhaust pipe 13 includes a first exhaust pipe cover 91 covering the entire periphery of an exhaust pipe front portion 133 located near the outer side of the engine 3 in the lateral direction, and a second exhaust pipe cover 92 covering an outer side of an exhaust pipe rear portion 134 in the lateral direction located behind the engine 3 .
- FIG. 11 is a side view of the first exhaust pipe cover 91 .
- the exhaust pipe front portion 133 extends rearward and upward on a left surface of the front cylinder 10 , and extends rearward substantially horizontally between the front cylinder 10 and the rear cylinder 11 . Therefore, the exhaust pipe front portion 133 includes a bent part 13 b at one location between the front cylinder 10 and the rear cylinder 11 .
- the first exhaust pipe cover 91 includes a bent part 91 b at a portion corresponding to the bent part 13 b.
- FIG. 12 is a plan view of FIG. 11 .
- the first exhaust pipe cover 91 includes a pair of left and right half members 91 a 1 and 91 a 2 .
- the first exhaust pipe cover 91 includes narrow parts 911 , 912 and 913 at three locations, i.e., a front part, an intermediate part and a rear part in the longitudinal direction of the vehicle. An inner diameter of each of the narrow parts is reduced.
- FIG. 13 shows a state where the first exhaust pipe cover 91 is mounted on the exhaust pipe front portion 133 of the front-cylinder exhaust pipe 13 .
- FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13 .
- FIG. 15 is a sectional view taken along line XV-XV in FIG. 13 .
- the first exhaust pipe cover 91 is fastened by a clamp member 93 which is a support member at the narrow parts 911 , 912 and 913 , and the first exhaust pipe cover 91 comes into contact with an outer peripheral surface of the exhaust pipe front portion 133 and is fixed. Therefore, as shown in FIG. 14 , the outer peripheral surface of the exhaust pipe front portion 133 and an inner peripheral surface of the first exhaust pipe cover 91 come into contact with each other at the narrow parts 911 , 912 and 913 , but a gap is formed between the outer peripheral surface of the exhaust pipe front portion 133 and the inner peripheral surface of the first exhaust pipe cover 91 at locations other than the narrow parts 911 , 912 and 913 as shown in FIG. 15 .
- FIG. 16 is a side view of the second exhaust pipe cover 92 .
- the exhaust pipe rear portion 134 extends rearward from a left rear portion of the rear cylinder 11 , and has a bent part 13 c at one location in the lateral direction. Therefore, the second exhaust pipe cover 92 includes a bent part 92 c at a portion corresponding to the bent part 13 c.
- FIG. 17 is a front view of the second exhaust pipe cover 92 shown in FIG. 16 .
- the second exhaust pipe cover 92 has a substantially U-shaped cross section, and its opening-side end 92 a is directed inward in the lateral direction. That is, the second exhaust pipe cover 92 covers an outer side (left side) of the exhaust pipe rear portion 134 shown in FIG. 3 in the lateral direction.
- the second exhaust pipe cover 92 includes narrow parts 921 , 922 and 923 at three locations, i.e., a front part, an intermediate part and a rear part in the longitudinal direction of the vehicle. An inner diameter of each of the narrow parts is reduced.
- FIG. 18 shows a state where the second exhaust pipe cover 92 is mounted on the exhaust pipe rear portion 134 of the front-cylinder exhaust pipe 13 .
- FIG. 19 is a sectional view taken along line XIX-XIX in FIG. 18 .
- FIG. 20 is a sectional view taken along line XX-XX in FIG. 18 .
- the second exhaust pipe cover 92 is fastened by a clamp member 94 which is a support member at the narrow parts 921 , 922 and 923 , and comes into contact with an outer peripheral surface of the exhaust pipe rear portion 134 and fixed. Therefore, as shown in FIG. 19 , the outer peripheral surface of the exhaust pipe rear portion 134 and the inner peripheral surface of the second exhaust pipe cover 92 come into contact with each other at the narrow parts 921 , 922 and 923 , but a gap is formed between the outer peripheral surface of the exhaust pipe rear portion 134 and the inner peripheral surface of the second exhaust pipe cover 92 at locations other than the narrow parts 921 , 922 and 923 as shown in FIG. 20 .
- the rear-cylinder exhaust pipe 15 includes a third exhaust pipe cover 95 covering an outer side in the lateral direction of a portion 151 located behind the engine 3 .
- FIG. 21 is a side view of the third exhaust pipe cover 95 .
- the rear-cylinder exhaust pipe 15 extends leftward and rearward from a back of the rear cylinder 11 , and includes a bent part 15 a at one location in the lateral direction. Therefore, the third exhaust pipe cover 95 includes a bent part 95 a at a portion corresponding to the bent part 15 a shown in FIG. 3 .
- FIG. 22 is a front view of the third exhaust pipe cover 95 shown in FIG. 21 .
- the third exhaust pipe cover 95 has a substantially U-shaped cross section, and the opening portion 95 a is directed inward in the lateral direction. That is, the third exhaust pipe cover 95 covers an outer side (left side) of the rear-cylinder exhaust pipe 15 in the lateral direction.
- the third exhaust pipe cover 95 includes narrow parts 951 , 952 and 953 at three locations, i.e., a front part, an intermediate part and a rear part in the longitudinal direction of the vehicle. An inner diameter of each of the narrow parts is reduced.
- a method of mounting the third exhaust pipe cover 95 on the rear-cylinder exhaust pipe 15 is the same as the above-described method of mounting the second exhaust pipe cover 92 on the exhaust pipe rear portion 134 of the front-cylinder exhaust pipe 13 . That is, the third exhaust pipe cover 95 is fastened by a clamp member at the narrow parts 951 , 952 and 953 , comes into contact with an outer peripheral surface of the rear-cylinder exhaust pipe 15 and fixed.
- the outer peripheral surface of the rear-cylinder exhaust pipe 15 and an inner peripheral surface of the third exhaust pipe cover 95 come into contact with each other at the narrow parts 951 , 952 and 953 , but a gap is formed between the outer peripheral surface of the rear-cylinder exhaust pipe 15 and the inner peripheral surface of the third exhaust pipe cover 95 at a location other than the narrow parts 951 , 952 and 953 .
- FIG. 23 is a vertical enlarged sectional view of the muffler 16 .
- the front wall 40 and the rear wall 60 are respectively fixed to front and rear ends of the outer cylinder 59 by welding the entire peripheries thereof.
- the inside of the outer cylinder 59 is divided by a plurality of partition plates 61 , 62 and 64 and an arrester plate 63 into a resonance chamber 67 , a first expansion chamber 68 , a second expansion chamber 69 , a carbon separation/third expansion chamber 70 and a carbon accommodation chamber 71 in this order from the front.
- a communication tube 74 for supplying exhaust gas to a central portion of the arrester plate 63 is provided in the partition plate 62 between the first expansion chamber 68 and the second expansion chamber 69 , and a tail tube 76 penetrating the carbon accommodation chamber 71 is provided in the third expansion chamber 70 and outside the muffler.
- An inner cylinder 78 made of punched metal and a cushioning 79 such as SUS wool are provided on an inner peripheral surface of the first expansion chamber 68 , and a notch 64 a which brings the third expansion chamber 70 and the carbon accommodation chamber 71 into communication with each other is formed in an outer peripheral end of the partition plate 64 between the third expansion chamber 70 and the carbon accommodation chamber 71 .
- An opening having a twisted guide blade is formed in the arrester plate 63 , exhaust gas supplied from the communication tube 74 is supplied into the third expansion chamber 70 as spin flow, and carbon is sent from the notch 64 a into the carbon accommodation chamber 71 .
- a carbon discharge port 80 is formed in a lower end of the carbon accommodation chamber 71 , and the port is closed with a detachable plug 81 .
- the partition plate 61 disposed on the most front side is utilized for supporting a pipe, and tube-holding holes 83 and 84 corresponding to exhaust pipe connection ports 41 and 42 of the front wall 40 are formed.
- the joint tube 44 fixed to the front-cylinder exhaust pipe connection port 41 of the front wall 40 by welding its entire periphery penetrates the upper holding hole 83 of the partition plate 61 , and opens at the first expansion chamber 68 .
- the joint tube 43 fixed to the rear-cylinder exhaust pipe connection port 42 of the front wall 40 by welding its entire periphery penetrates the lower holding hole 84 of the partition plate 61 , and opens at the first expansion chamber 68 . That is, the joint tube 44 and the joint tube 43 are supported at two locations by the front wall 40 and the partition plate 61 .
- a tip end 44 a of the joint tube 44 which opens into the first expansion chamber 68 is located at a front portion in the first expansion chamber 68 as compared with a tip end 43 a of the joint tube 43 which opens into the first expansion chamber 68 . Exhaust gas discharged from the tip end 44 a and exhaust gas discharged from the tip end 43 a are mixed with each other in the first expansion chamber 68 .
- the first exhaust pipe cover 91 includes the pair of half members 91 a 1 and 91 a 2 , it is possible to easily mount the first exhaust pipe cover 91 on the exhaust pipe front portion 133 .
- the second exhaust pipe cover 92 has a substantially U-shaped cross section, it is possible to easily form the second exhaust pipe cover 92 which covers the outer side of the exhaust pipe rear portion 34 in the lateral direction.
- the gap is secured between the portion other than the narrow parts and the front-cylinder exhaust pipe 13 , and the first exhaust pipe cover 91 and the second exhaust pipe cover 92 are reliably supported by the front-cylinder exhaust pipe 13 .
- the front-cylinder exhaust pipe 13 includes the bent part 13 b at one location in the portion covered by the first exhaust pipe cover 91 , the first exhaust pipe cover 91 has the bent part 91 b corresponding to the bent part 13 b and the bent part 91 b is located along the bent part 13 b , and the first exhaust pipe cover 91 is easily supported by the front-cylinder exhaust pipe 13 .
- the second exhaust pipe cover 92 Since the front-cylinder exhaust pipe 13 includes the bent part 13 c at one location in the portion covered by the second exhaust pipe cover 92 , the second exhaust pipe cover 92 includes the bent part 92 c corresponding to the bent part 13 c , the bent part 92 c is located along the bent part 13 c , and the second exhaust pipe cover 92 is easily supported by the front-cylinder exhaust pipe 13 .
- the third exhaust pipe cover 95 has the substantially U-shaped cross section, it is possible to easily form the third exhaust pipe cover 95 which covers the outer side of the rear-cylinder exhaust pipe 15 in the lateral direction.
- the third exhaust pipe cover 95 includes the gap between itself and the rear-cylinder exhaust pipe 15 , the heat influence from the rear-cylinder exhaust pipe 15 can be reduced, and the temperature rise of the third exhaust pipe cover 95 can be suppressed. Since the third exhaust pipe cover 95 is in contact with the outer peripheral surface of the rear-cylinder exhaust pipe 15 and fixed by the clamp member at the narrow parts 951 , 952 and 953 at three locations, i.e., the front part, the intermediate part and the rear part, the gap is secured between the portion other than the narrow parts and the rear-cylinder exhaust pipe 15 , and the third exhaust pipe cover 95 is reliably supported by the rear-cylinder exhaust pipe 15 .
- the third exhaust pipe cover 95 includes the bent part 95 a corresponding to the bent part 15 a , the bent part 95 a is located along the bent part 15 a , and the third exhaust pipe cover 95 is easily supported by the rear-cylinder exhaust pipe 15 .
- the curved portion 13 a of the front-cylinder exhaust pipe 13 in which a distance between the curved portion 13 a and the front cylinder 10 is short and which has relatively high temperature in the entire front-cylinder exhaust pipe 13 is located inward of the second front part pipe 24 in the lateral direction. Therefore, as compared with the conventional case where the curved portion of the front-cylinder exhaust pipe is located outward of the side frame in the lateral direction, it is possible to reduce the heat influence of the front-cylinder exhaust pipe 13 exerted on the cowl located outward of the second front part pipe 24 in the lateral direction.
- the angle between the first opening 13 a 3 and the second opening 13 a 4 of the curved portion 13 a is about 45°, it is possible to easily curve and fold back the front-cylinder exhaust pipe 13 rearward by mounting the curved portion 13 a .
- the front-cylinder exhaust pipe 13 includes the curved portion 13 a , the front-cylinder exhaust pipe 13 can be easily located inward of the second front part pipe 24 in the lateral direction, and can be located such that the front-cylinder exhaust pipe 13 has a distance from the throttle bodies 10 a and 11 a of the engine 3 .
- the curved portion 13 a is formed by bonding the half members 13 a 1 and 13 a 2 having the same shape to each other.
- the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are connected to the same muffler 16 , it is possible to reduce the number of mufflers and to reduce the number of parts.
- the piping structure is simplified as compared with the piping structure utilizing a collecting tube, and the assembling operability can further be enhanced.
- front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are arranged side by side in the vertical direction in front of the muffler 16 , the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 do not protrude in the lateral direction, and the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 can be disposed compactly.
- the invention can also be applied to a two-cylinder engine other than the two-cylinder V-engine.
- the invention can also be applied to a vehicle other than the straddle-type all-terrain four-wheeled vehicle.
- the present invention can provide the exhaust device in which a portion of an exhaust pipe covered by an exhaust pipe cover is rationalized, the invention has a high industrial utility value.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to an exhaust device of a vehicle and a straddle-type four-wheeled vehicle provided with the exhaust device.
- 2. Description of the Related Art
- Conventionally, as shown in U.S. Pat. No. 6,719,084, in an exhaust device of a straddle-type four-wheeled vehicle, an exhaust pipe extends from a front surface of a cylinder of an engine to a muffler while passing through an outer side of the engine in a lateral direction, and the outer side of the exhaust pipe in the lateral direction is uniformly covered by an exhaust pipe cover.
- It is an object of the present invention to provide an exhaust device in which a portion of an exhaust pipe covered by an exhaust pipe cover is rationalized.
- According to a first aspect of the present invention, the exhaust device of a vehicle includes a muffler disposed in a rear part of the vehicle, an exhaust pipe extending from a front surface of a cylinder of an engine to the muffler while passing through an outer side of the engine in the lateral direction, a first exhaust pipe cover covering an entire periphery of an exhaust pipe front portion located near the outer side of the engine in the lateral direction, and a second exhaust pipe cover covering an outer side of an exhaust pipe rear portion located behind the engine in the lateral direction.
- According to the above configuration, by covering the entire periphery of the exhaust pipe front portion having high temperature with the first exhaust pipe cover, the heat influence from the exhaust pipe is reduced. By covering the outer side, in the lateral direction, of the exhaust pipe rear portion having low temperature with the second exhaust pipe cover, the amount of the exhaust pipe cover can be reduced.
- It is preferable that the first aspect of the present invention has the following configurations.
- (1) The first exhaust pipe cover is formed by a pair of half members, and the second exhaust pipe cover has a substantially U-shaped cross section.
- (2) The first exhaust pipe cover and the second exhaust pipe cover have a gap between themselves and an outer peripheral surface of the exhaust pipe, and the first exhaust pipe cover and the second exhaust pipe cover are in contact with the outer peripheral surface and fixed by a support member at three locations, which are a front part, an intermediate part and a rear part in the longitudinal direction of the vehicle.
- (3) The exhaust pipe has a bent part at one location in a portion covered by the first exhaust pipe cover.
- (4) The exhaust pipe has a bent part at one location in a portion covered by the second exhaust pipe cover.
- According to the configuration (1), the first exhaust pipe cover which covers the entire periphery of the exhaust pipe front portion can easily be mounted on the exhaust pipe. In addition, the second exhaust pipe cover which covers the outer side of the exhaust pipe rear portion in the lateral direction can easily be formed.
- According to the configuration (2), since the first exhaust pipe cover and the second exhaust pipe cover have the gap between themselves and the exhaust pipe, the heat influence from the exhaust pipe can be reduced, and the temperature rise of the first exhaust pipe cover and the second exhaust pipe cover can be suppressed. The first exhaust pipe cover and the second exhaust pipe cover are in contact with the outer peripheral surface of the exhaust pipe and fixed by the support member at the three locations, which are the front part, the intermediate part and the rear part. Therefore, the first exhaust pipe cover and the second exhaust pipe cover are reliably supported by the exhaust pipe with the gap between themselves and the exhaust pipe.
- According to the configuration (3), since the exhaust pipe has the bent part at the one location in the portion covered by the first exhaust pipe cover, the first exhaust pipe cover is located along the bent part of the exhaust pipe, and the first exhaust pipe cover is easily supported by the exhaust pipe.
- According to the configuration (4), since the exhaust pipe has the bent part at one location in the portion covered by the second exhaust pipe cover, the second exhaust pipe cover is located along the bent part of the exhaust pipe, and the second exhaust pipe cover is easily supported by the exhaust pipe.
- A second aspect of the present invention provides a straddle-type four-wheeled vehicle having the exhaust device of the first aspect of the present invention.
- According to the above configuration, it is possible to provide a straddle-type four-wheeled vehicle in which a portion of the exhaust pipe covered by the exhaust pipe cover is rationalized.
- In summary, according to the present invention, a portion of the exhaust pipe covered by the exhaust pipe cover can be rationalized.
-
FIG. 1 is a left side view of a straddle-type all-terrain four-wheeled vehicle according to an embodiment of the present invention; -
FIG. 2 is a perspective view of a body frame, an engine and an exhaust device of the vehicle shown inFIG. 1 ; -
FIG. 3 is a left side view of the body frame, the engine and the exhaust device shown inFIG. 2 ; -
FIG. 4 is a plan view of the body frame, the engine and the exhaust device shown inFIG. 2 ; -
FIG. 5 is a plan view of a portion connecting a front-cylinder exhaust pipe and a rear-cylinder exhaust pipe to a muffler; -
FIG. 6 is a side view ofFIG. 5 ; -
FIG. 7 is a partial enlarged view of a curved portion of the front-cylinder exhaust pipe; -
FIG. 8 is a front view of the curved portion shown inFIG. 7 ; -
FIG. 9 is a sectional view taken along line IX-IX inFIG. 8 ; -
FIG. 10 is a sectional view taken along line X-X inFIG. 9 ; -
FIG. 11 is a side view of a first exhaust pipe cover; -
FIG. 12 is a plan view ofFIG. 11 , and shows one of half members; -
FIG. 13 is a diagram showing a state where the first exhaust pipe cover is mounted on a front portion of an exhaust pipe of the front-cylinder exhaust pipe; -
FIG. 14 is a sectional view taken along line XIV-XIV inFIG. 13 ; -
FIG. 15 is a sectional view taken along line XV-XV inFIG. 13 ; -
FIG. 16 is a side view of a second exhaust pipe cover; -
FIG. 17 is a front view of the second exhaust pipe cover shown inFIG. 16 ; -
FIG. 18 is a diagram showing a state where the second exhaust pipe cover is mounted on arear portion 134 of the exhaust pipe of the front-cylinder exhaust pipe 13; -
FIG. 19 is a sectional view taken along line XIX-XIX inFIG. 18 ; -
FIG. 20 is a sectional view taken along line XX-XX inFIG. 18 ; -
FIG. 21 is a side view of a third exhaust pipe cover; -
FIG. 22 is a front view of the thirdexhaust pipe cover 95 shown inFIG. 21 ; and -
FIG. 23 is a vertical enlarged sectional view of the muffler. -
FIGS. 1 to 23 show a straddle-type all-terrain four-wheeled vehicle (ATV) and an exhaust device according to an embodiment of the present invention, and the present embodiment will be described based on these drawings. In the following description, conception of directions of the present embodiment matches with conception of directions as viewed from a driver of the straddle-type all-terrain four-wheeled vehicle. -
FIG. 1 is a left side view of the straddle-type all-terrain four-wheeled vehicle according to the embodiment of the present invention. A pair of left and right front wheels 1 and a pair of left and rightrear wheels 2 are provided in a front part and a rear part of a body frame F, a two-cylinder V-engine 3 is installed between the front andrear wheels 1 and 2. Asteering handle 5 is provided on a front part of an upper portion of the body frame F, and a straddle-type seat 6 is provided behind thesteering handle 5. The two-cylinder V-engine 3 is provided with afront cylinder 10 tilted forward and arear cylinder 11 tilted rearward on the upper side of a crankcase 8. Anexhaust port 12 is formed in a front wall of thefront cylinder 10, a front-cylinder exhaust pipe 13 is connected to theexhaust port 12, anexhaust port 14 is formed in a rear wall of therear cylinder 11, and a rear-cylinder exhaust pipe 15 is connected to theexhaust port 14. Asingle muffler 16 that is common for the front and rear cylinders is disposed on a rear part of the body frame F, and themuffler 16 is located between the body frame F and the leftrear wheel 2. -
FIG. 2 is a perspective view of the body frame F, theengine 3 and the exhaust device. The following members are integrally formed together by welding: i.e., a pair of left and rightupper part pipes 21 extending in a longitudinal direction, a pair of left and rightlower part pipes 22 extending in the longitudinal direction, firstfront part pipes 23 which couple front ends of theupper part pipes 21 and thelower part pipes 22 to each other, secondfront part pipes 24 which are disposed behind the firstfront part pipes 23 with a fixed distance therefrom and which couple theupper part pipes 21 and thelower part pipes 22 to each other, and a plurality ofcross pipes upper part pipes 21 and the left and rightlower part pipes 22 to each other. A risingpipe 29 extending forward and upward is integrally formed on a rear end of each of thelower part pipes 22, and an upper end of the risingpipe 29 is coupled to theupper part pipe 21 by welding. A rearpart support pipe 28 extending rearward is fixed to a rear end of each of the lower part pipes by welding, a rear end of the rearpart support pipe 28 is coupled to lower ends of a pair of left and rightrear part pipes 30 extending in the vertical direction, and the upper part of therear part pipe 30 is coupled to a rear part of theupper part pipe 21. - The
engine 3 is installed within a range surrounded by theupper part pipes 21 and thelower part pipes 22, and themuffler 16 is mounted on the rear part of the leftupper part pipe 21 through amuffler mounting device 32. -
FIG. 3 is a left side view of the body frame F, theengine 3 and the exhaust device shown inFIG. 2 . A front-cylinder exhaustpipe connection port 41 and a rear-cylinder exhaustpipe connection port 42 are formed side by side in the vertical direction on afront wall 40 of themuffler 16. Ajoint tube 43 protruding forward is integrally welded to the rear-cylinder exhaustpipe connection port 42 on the lower side, a rear end of the rear-cylinder exhaust pipe 15 is detachably inserted into thejoint tube 43, and fastened by afastening band 45. Ajoint tube 44 protruding forward is integrally welded to the front-cylinder exhaustpipe connection port 41 on the upper side, and a rear end of the front-cylinder exhaust pipe 13 is detachably inserted into thejoint tube 44, and fastened by afastening band 46. -
FIG. 4 is a plan view of the body frame F, theengine 3 and the exhaust device shown inFIG. 2 . As shown inFIGS. 2 and 4 , the rear-cylinder exhaust pipe 15 extends diagonally leftward and rearward from theexhaust port 14 opening in the rear wall of therear cylinder 11, the rear-cylinder exhaust pipe 15 protrudes leftward from the body frame F at a rear position of theleft rising pipe 29, extends rearward on the left side of the leftupper part pipe 21 and the left rearpart support pipe 28 and reaches themuffler 16. - The front-
cylinder exhaust pipe 13 extends leftward in a curved shape in thecurved portion 13 a from theexhaust port 12 which opens in the front wall of thefront cylinder 10, and the front-cylinder exhaust pipe 13 is folded back rearward in a right direction (inward in the lateral direction) of the left secondfront part pipe 24 as shown inFIG. 2 . An electricpower steering motor 7 which assists a steering force of the steering handle 5 is provided in a lower portion of a shaft (not shown) of thesteering handle 5. Thecurved portion 13 a is located rearward with a fixed space from themotor 7. As shown inFIGS. 3 and 4 , the front-cylinder exhaust pipe 13 extends rearward substantially along the leftupper part pipe 21 as viewed from above while keeping a fixed space in the lateral direction from a left surface of thefront cylinder 10, a left surface of therear cylinder 11 andthrottle bodies engine 3. More specifically, the front-cylinder exhaust pipe 13 is disposed such that, in an outer side of theengine 3 in the lateral direction, an inner end of the front-cylinder exhaust pipe 13 in the lateral direction is located inward in the lateral direction as compared with an outer end of theupper part pipe 21 in the lateral direction. The front-cylinder exhaust pipe 13 is superposed on the rear-cylinder exhaust pipe 15 in the vertical direction above the rear-cylinder exhaust pipe 15 at a rear position of theleft rising pipe 29 and a front position of the left rearpart support pipe 28. Thereafter, the front-cylinder exhaust pipe 13 extends rearward on the left side of the leftupper part pipe 21 and the left rearpart support pipe 28, and reaches themuffler 16 which is themuffler 16 that the rear-cylinder exhaust pipe 15 reaches. As shown inFIG. 4 , the front-cylinder exhaust pipe 13 is located outward (leftward) in the lateral direction with respect to the rear-cylinder exhaust pipe 15 behind theengine 3. As shown inFIGS. 3 and 4 , a connecting portion of the front-cylinder exhaust pipe 13 to themuffler 16 and a connecting portion of the rear-cylinder exhaust pipe 15 to themuffler 16 are arranged side by side in the vertical direction. -
FIG. 5 is a plan view of a portion which connects the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 to themuffler 16, andFIG. 6 is a side view thereof. As shown inFIGS. 5 and 6 , the connecting portion of the front-cylinder exhaust pipe 13 to themuffler 16 and the connecting portion of the rear-cylinder exhaust pipe 15 to themuffler 16 are arranged side by side in the vertical direction. Since the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are arranged side by side in the vertical direction in front of themuffler 16, it is necessary to deviate, from each other, a longitudinal position of thefastening band 46 where the front-cylinder exhaust pipe 13 is fastened to thejoint tube 44 and a longitudinal position of thefastening band 45 where the rear-cylinder exhaust pipe 15 is fastened to thejoint tube 43. In the present embodiment, by locating thefastening band 46 in front of thefastening band 45, both the longitudinal positions are deviated from each other, a curvature of the front-cylinder exhaust pipe 13 in front of thefastening band 46 is made larger than a curvature of the rear-cylinder exhaust pipe 15 in front of thefastening band 45. According to this configuration, the front-cylinder exhaust pipe 13 is located outward (leftward) in the lateral direction with respect to the rear-cylinder exhaust pipe 15 behind theengine 3. -
FIG. 7 is a partial enlarged view of thecurved portion 13 a of the front-cylinder exhaust pipe 13. Thecurved portion 13 a includes a pair of upper andlower half members 13 a 1 and 13 a 2. The front-cylinder exhaust pipe 13 is divided into afront end portion 131 and afront part 132. The exhaustupstream end 131 a of thefront end portion 131 is connected to theexhaust port 12 shown inFIG. 4 , and the exhaustdownstream end 131 b of thefront end portion 131 is inserted into afirst opening 13 a 3 of thecurved portion 13 a. The exhaustupstream end 132 a of thefront part 132 is inserted into asecond opening 13 a 4 of thecurved portion 13 a. -
FIG. 8 is a front view of thecurved portion 13 a shown inFIG. 7 . Thehalf members 13 a 1 and 13 a 2 are bonded to each other by welding in the vertical direction, and by the welding and bonding of thehalf members 13 a 1 and 13 a 2, thefront end portion 131 is fixed to thefirst opening 13 a 3 by welding, and thefront part 132 is fixed to thesecond opening 13 a 4 by welding. -
FIG. 9 is a sectional view taken along line IX-IX inFIG. 8 .FIG. 10 is a sectional view taken along line X-X inFIG. 9 . As shown inFIGS. 9 and 10 , the upper andlower half members 13 a 1 and 13 a 2 have the same shapes. An angle θ formed between a center line of thefirst opening 13 a 3 and a center line of thesecond opening 13 a 4 is about 45°, and by inserting thefront end portion 131 into thefirst opening 13 a 3 and inserting thefront part 132 into thesecond opening 13 a 4, the front-cylinder exhaust pipe 13 can extend in a curved shape leftward at thecurved portion 13 a and can be folded back rearward. By setting the angle θ formed between thefirst opening 13 a 3 and thesecond opening 13 a 4 to about 45°, the front-cylinder exhaust pipe 13 can be folded back rearward in the right direction (inward in the lateral direction) of the left secondfront part pipe 24. - After the front-
cylinder exhaust pipe 13 is folded back rearward in the right direction of the secondfront part pipe 24 as shown inFIG. 3 , the front-cylinder exhaust pipe 13 extends diagonally upward, passes through a portion near a left surface of thefront cylinder 10 in a rearward and upward tilted attitude, the front-cylinder exhaust pipe 13 is bent slightly rearward and downward at a central portion of a V-bank between both thecylinders rear cylinder 11. - As shown in
FIGS. 2 and 3 , the front-cylinder exhaust pipe 13 includes a firstexhaust pipe cover 91 covering the entire periphery of an exhaustpipe front portion 133 located near the outer side of theengine 3 in the lateral direction, and a secondexhaust pipe cover 92 covering an outer side of an exhaust piperear portion 134 in the lateral direction located behind theengine 3. -
FIG. 11 is a side view of the firstexhaust pipe cover 91. As shown inFIG. 3 , the exhaustpipe front portion 133 extends rearward and upward on a left surface of thefront cylinder 10, and extends rearward substantially horizontally between thefront cylinder 10 and therear cylinder 11. Therefore, the exhaustpipe front portion 133 includes abent part 13 b at one location between thefront cylinder 10 and therear cylinder 11. Thus, the firstexhaust pipe cover 91 includes abent part 91 b at a portion corresponding to thebent part 13 b. -
FIG. 12 is a plan view ofFIG. 11 . As shown inFIG. 12 , the firstexhaust pipe cover 91 includes a pair of left and right half members 91 a 1 and 91 a 2. - The first
exhaust pipe cover 91 includesnarrow parts FIG. 13 shows a state where the firstexhaust pipe cover 91 is mounted on the exhaustpipe front portion 133 of the front-cylinder exhaust pipe 13.FIG. 14 is a sectional view taken along line XIV-XIV inFIG. 13 .FIG. 15 is a sectional view taken along line XV-XV inFIG. 13 . The firstexhaust pipe cover 91 is fastened by aclamp member 93 which is a support member at thenarrow parts exhaust pipe cover 91 comes into contact with an outer peripheral surface of the exhaustpipe front portion 133 and is fixed. Therefore, as shown inFIG. 14 , the outer peripheral surface of the exhaustpipe front portion 133 and an inner peripheral surface of the firstexhaust pipe cover 91 come into contact with each other at thenarrow parts pipe front portion 133 and the inner peripheral surface of the firstexhaust pipe cover 91 at locations other than thenarrow parts FIG. 15 . -
FIG. 16 is a side view of the secondexhaust pipe cover 92. As shown inFIG. 3 , the exhaust piperear portion 134 extends rearward from a left rear portion of therear cylinder 11, and has abent part 13 c at one location in the lateral direction. Therefore, the secondexhaust pipe cover 92 includes abent part 92 c at a portion corresponding to thebent part 13 c. -
FIG. 17 is a front view of the secondexhaust pipe cover 92 shown inFIG. 16 . As shown inFIG. 17 , the secondexhaust pipe cover 92 has a substantially U-shaped cross section, and its opening-side end 92 a is directed inward in the lateral direction. That is, the secondexhaust pipe cover 92 covers an outer side (left side) of the exhaust piperear portion 134 shown inFIG. 3 in the lateral direction. - The second
exhaust pipe cover 92 includesnarrow parts FIG. 18 shows a state where the secondexhaust pipe cover 92 is mounted on the exhaust piperear portion 134 of the front-cylinder exhaust pipe 13.FIG. 19 is a sectional view taken along line XIX-XIX inFIG. 18 .FIG. 20 is a sectional view taken along line XX-XX inFIG. 18 . The secondexhaust pipe cover 92 is fastened by aclamp member 94 which is a support member at thenarrow parts rear portion 134 and fixed. Therefore, as shown inFIG. 19 , the outer peripheral surface of the exhaust piperear portion 134 and the inner peripheral surface of the secondexhaust pipe cover 92 come into contact with each other at thenarrow parts rear portion 134 and the inner peripheral surface of the secondexhaust pipe cover 92 at locations other than thenarrow parts FIG. 20 . - As shown in
FIGS. 2 and 3 , the rear-cylinder exhaust pipe 15 includes a thirdexhaust pipe cover 95 covering an outer side in the lateral direction of aportion 151 located behind theengine 3. -
FIG. 21 is a side view of the thirdexhaust pipe cover 95. As shown inFIG. 3 , the rear-cylinder exhaust pipe 15 extends leftward and rearward from a back of therear cylinder 11, and includes abent part 15 a at one location in the lateral direction. Therefore, the thirdexhaust pipe cover 95 includes abent part 95 a at a portion corresponding to thebent part 15 a shown inFIG. 3 . -
FIG. 22 is a front view of the thirdexhaust pipe cover 95 shown inFIG. 21 . As shown inFIG. 22 , the thirdexhaust pipe cover 95 has a substantially U-shaped cross section, and the openingportion 95 a is directed inward in the lateral direction. That is, the thirdexhaust pipe cover 95 covers an outer side (left side) of the rear-cylinder exhaust pipe 15 in the lateral direction. - As shown in
FIG. 21 , the thirdexhaust pipe cover 95 includesnarrow parts exhaust pipe cover 95 on the rear-cylinder exhaust pipe 15 is the same as the above-described method of mounting the secondexhaust pipe cover 92 on the exhaust piperear portion 134 of the front-cylinder exhaust pipe 13. That is, the thirdexhaust pipe cover 95 is fastened by a clamp member at thenarrow parts cylinder exhaust pipe 15 and fixed. Therefore, the outer peripheral surface of the rear-cylinder exhaust pipe 15 and an inner peripheral surface of the thirdexhaust pipe cover 95 come into contact with each other at thenarrow parts cylinder exhaust pipe 15 and the inner peripheral surface of the thirdexhaust pipe cover 95 at a location other than thenarrow parts -
FIG. 23 is a vertical enlarged sectional view of themuffler 16. Thefront wall 40 and therear wall 60 are respectively fixed to front and rear ends of theouter cylinder 59 by welding the entire peripheries thereof. The inside of theouter cylinder 59 is divided by a plurality ofpartition plates arrester plate 63 into aresonance chamber 67, afirst expansion chamber 68, asecond expansion chamber 69, a carbon separation/third expansion chamber 70 and acarbon accommodation chamber 71 in this order from the front. Acommunication tube 74 for supplying exhaust gas to a central portion of thearrester plate 63 is provided in thepartition plate 62 between thefirst expansion chamber 68 and thesecond expansion chamber 69, and atail tube 76 penetrating thecarbon accommodation chamber 71 is provided in thethird expansion chamber 70 and outside the muffler. Aninner cylinder 78 made of punched metal and acushioning 79 such as SUS wool are provided on an inner peripheral surface of thefirst expansion chamber 68, and anotch 64 a which brings thethird expansion chamber 70 and thecarbon accommodation chamber 71 into communication with each other is formed in an outer peripheral end of thepartition plate 64 between thethird expansion chamber 70 and thecarbon accommodation chamber 71. An opening having a twisted guide blade is formed in thearrester plate 63, exhaust gas supplied from thecommunication tube 74 is supplied into thethird expansion chamber 70 as spin flow, and carbon is sent from thenotch 64 a into thecarbon accommodation chamber 71. Acarbon discharge port 80 is formed in a lower end of thecarbon accommodation chamber 71, and the port is closed with adetachable plug 81. - The
partition plate 61 disposed on the most front side is utilized for supporting a pipe, and tube-holdingholes pipe connection ports front wall 40 are formed. Thejoint tube 44 fixed to the front-cylinder exhaustpipe connection port 41 of thefront wall 40 by welding its entire periphery penetrates the upper holdinghole 83 of thepartition plate 61, and opens at thefirst expansion chamber 68. Thejoint tube 43 fixed to the rear-cylinder exhaustpipe connection port 42 of thefront wall 40 by welding its entire periphery penetrates thelower holding hole 84 of thepartition plate 61, and opens at thefirst expansion chamber 68. That is, thejoint tube 44 and thejoint tube 43 are supported at two locations by thefront wall 40 and thepartition plate 61. Atip end 44 a of thejoint tube 44 which opens into thefirst expansion chamber 68 is located at a front portion in thefirst expansion chamber 68 as compared with a tip end 43 a of thejoint tube 43 which opens into thefirst expansion chamber 68. Exhaust gas discharged from the tip end 44 a and exhaust gas discharged from the tip end 43 a are mixed with each other in thefirst expansion chamber 68. - According to the above embodiment, the following effects can be obtained.
- (1) The entire periphery of the exhaust
pipe front portion 133 having high temperature is covered by the firstexhaust pipe cover 91. Therefore, the heat influence from the front-cylinder exhaust pipe 13 is reduced. The outer side of the exhaust piperear portion 134 having low temperature in the lateral direction is covered by the secondexhaust pipe cover 92. Therefore, the amounts of the exhaust pipe covers 91 and 92 can be reduced. - (2) Since the first
exhaust pipe cover 91 includes the pair of half members 91 a 1 and 91 a 2, it is possible to easily mount the firstexhaust pipe cover 91 on the exhaustpipe front portion 133. Since the secondexhaust pipe cover 92 has a substantially U-shaped cross section, it is possible to easily form the secondexhaust pipe cover 92 which covers the outer side of the exhaust pipe rear portion 34 in the lateral direction. - (3) Since the first
exhaust pipe cover 91 and the secondexhaust pipe cover 92 have the gap between themselves and the front-cylinder exhaust pipe 13, the heat influence from the front-cylinder exhaust pipe 13 can be reduced, and the temperature rise of the firstexhaust pipe cover 91 and the secondexhaust pipe cover 92 can be suppressed. Since the firstexhaust pipe cover 91 and the secondexhaust pipe cover 92 are in contact with the outer peripheral surface of the front-cylinder exhaust pipe 13 and fixed by theclamp members narrow parts cylinder exhaust pipe 13, and the firstexhaust pipe cover 91 and the secondexhaust pipe cover 92 are reliably supported by the front-cylinder exhaust pipe 13. - (4) Since the front-
cylinder exhaust pipe 13 includes thebent part 13 b at one location in the portion covered by the firstexhaust pipe cover 91, the firstexhaust pipe cover 91 has thebent part 91 b corresponding to thebent part 13 b and thebent part 91 b is located along thebent part 13 b, and the firstexhaust pipe cover 91 is easily supported by the front-cylinder exhaust pipe 13. - (5) Since the front-
cylinder exhaust pipe 13 includes thebent part 13 c at one location in the portion covered by the secondexhaust pipe cover 92, the secondexhaust pipe cover 92 includes thebent part 92 c corresponding to thebent part 13 c, thebent part 92 c is located along thebent part 13 c, and the secondexhaust pipe cover 92 is easily supported by the front-cylinder exhaust pipe 13. - (6) Since the third
exhaust pipe cover 95 has the substantially U-shaped cross section, it is possible to easily form the thirdexhaust pipe cover 95 which covers the outer side of the rear-cylinder exhaust pipe 15 in the lateral direction. - (7) Since the third
exhaust pipe cover 95 includes the gap between itself and the rear-cylinder exhaust pipe 15, the heat influence from the rear-cylinder exhaust pipe 15 can be reduced, and the temperature rise of the thirdexhaust pipe cover 95 can be suppressed. Since the thirdexhaust pipe cover 95 is in contact with the outer peripheral surface of the rear-cylinder exhaust pipe 15 and fixed by the clamp member at thenarrow parts cylinder exhaust pipe 15, and the thirdexhaust pipe cover 95 is reliably supported by the rear-cylinder exhaust pipe 15. - (8) Since the rear-
cylinder exhaust pipe 15 has thebent part 15 a at one location in the portion covered by the thirdexhaust pipe cover 95, the thirdexhaust pipe cover 95 includes thebent part 95 a corresponding to thebent part 15 a, thebent part 95 a is located along thebent part 15 a, and the thirdexhaust pipe cover 95 is easily supported by the rear-cylinder exhaust pipe 15. - (9) The
curved portion 13 a of the front-cylinder exhaust pipe 13 in which a distance between thecurved portion 13 a and thefront cylinder 10 is short and which has relatively high temperature in the entire front-cylinder exhaust pipe 13 is located inward of the secondfront part pipe 24 in the lateral direction. Therefore, as compared with the conventional case where the curved portion of the front-cylinder exhaust pipe is located outward of the side frame in the lateral direction, it is possible to reduce the heat influence of the front-cylinder exhaust pipe 13 exerted on the cowl located outward of the secondfront part pipe 24 in the lateral direction. - (10) Since the
curved portion 13 a has a distance from thepower steering motor 7, it is possible to reduce the heat influence of the front-cylinder exhaust pipe 13 exerted on themotor 7. - (11) Since the front-
cylinder exhaust pipe 13 has a distance from thethrottle bodies engine 3, it is possible to reduce the heat influence of the front-cylinder exhaust pipe 13 exerted on thethrottle bodies - (12) Since the temperature of the rear-
cylinder exhaust pipe 15 behind theengine 3 is higher than the temperature of the front-cylinder exhaust pipe 13, it is possible to block the heat influence from the rear-cylinder exhaust pipe 15 exerted on the cowl located outward in the lateral direction by the front-cylinder exhaust pipe 13 by locating the rear-cylinder exhaust pipe 15 inward in the lateral direction with respect to the front-cylinder exhaust pipe 13. - (13) Since the temperature of the rear-
cylinder exhaust pipe 15 behind theengine 3 is higher than the temperature of the front-cylinder exhaust pipe 13, it is possible to block the heat influence from the rear-cylinder exhaust pipe 15 exerted on the vehicle body located at an upward position by the front-cylinder exhaust pipe 13 by locating the rear-cylinder exhaust pipe 15 below the front-cylinder exhaust pipe 13. - (14) Since the curvature of the front-
cylinder exhaust pipe 13 in front of thefastening band 46 is set greater than a curvature of the rear-cylinder exhaust pipe 15 in front of thefastening band 45, it is possible to easily achieve a configuration in which the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are arranged side by side in the vertical direction in front of themuffler 16 and the front-cylinder exhaust pipe 13 is located outward in the lateral direction with respect to the rear-cylinder exhaust pipe 15 behind theengine 3. - (15) Since the angle between the
first opening 13 a 3 and thesecond opening 13 a 4 of thecurved portion 13 a is about 45°, it is possible to easily curve and fold back the front-cylinder exhaust pipe 13 rearward by mounting thecurved portion 13 a. Since the front-cylinder exhaust pipe 13 includes thecurved portion 13 a, the front-cylinder exhaust pipe 13 can be easily located inward of the secondfront part pipe 24 in the lateral direction, and can be located such that the front-cylinder exhaust pipe 13 has a distance from thethrottle bodies engine 3. Thecurved portion 13 a is formed by bonding thehalf members 13 a 1 and 13 a 2 having the same shape to each other. Therefore, it is possible to enhance the manufacturability of thehalf members 13 a 1 and 13 a 2 and assembling performance of thecurved portion 13 a (bonding operation between the front-cylinder exhaust pipe 13 and thehalf members 13 a 1 and 13 a 2). - (16) Since the front-
cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are connected to thesame muffler 16, it is possible to reduce the number of mufflers and to reduce the number of parts. The piping structure is simplified as compared with the piping structure utilizing a collecting tube, and the assembling operability can further be enhanced. By making an insertion length of the front-cylinder exhaust pipe 13 into themuffler 16 shorter than an insertion length of the rear-cylinder exhaust pipe 15 into themuffler 16, the entire length of the front-cylinder exhaust pipe 13 and the entire length of the rear-cylinder exhaust pipe 15 become substantially equal to each other. Therefore, exhaust interference between the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 can be reduced, and the output of theengine 3 can be enhanced. - (17) Since the front-
cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 are arranged side by side in the vertical direction in front of themuffler 16, the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 do not protrude in the lateral direction, and the front-cylinder exhaust pipe 13 and the rear-cylinder exhaust pipe 15 can be disposed compactly. - (1) The invention can also be applied to a two-cylinder engine other than the two-cylinder V-engine.
- (2) The invention can also be applied to a vehicle other than the straddle-type all-terrain four-wheeled vehicle.
- Since the present invention can provide the exhaust device in which a portion of an exhaust pipe covered by an exhaust pipe cover is rationalized, the invention has a high industrial utility value.
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/979,699 US8215447B1 (en) | 2010-12-28 | 2010-12-28 | Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same |
CN201110436590.9A CN102536409B (en) | 2010-12-28 | 2011-12-23 | Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/979,699 US8215447B1 (en) | 2010-12-28 | 2010-12-28 | Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same |
Publications (2)
Publication Number | Publication Date |
---|---|
US20120160601A1 true US20120160601A1 (en) | 2012-06-28 |
US8215447B1 US8215447B1 (en) | 2012-07-10 |
Family
ID=46315332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/979,699 Active US8215447B1 (en) | 2010-12-28 | 2010-12-28 | Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same |
Country Status (2)
Country | Link |
---|---|
US (1) | US8215447B1 (en) |
CN (1) | CN102536409B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150007554A1 (en) * | 2013-07-08 | 2015-01-08 | Honda Motor Co., Ltd. | Oxygen sensor heat sinking boss |
JP2017057789A (en) * | 2015-09-16 | 2017-03-23 | 本田技研工業株式会社 | Internal combustion engine exhaust system |
US20180178827A1 (en) * | 2016-12-27 | 2018-06-28 | Honda Motor Co., Ltd. | Vehicle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6721640B2 (en) * | 2018-08-10 | 2020-07-15 | 本田技研工業株式会社 | Muffler for saddle type vehicles |
US10974783B2 (en) | 2018-08-17 | 2021-04-13 | Harley-Davidson Motor Company Group, LLC | Exhaust shield assembly |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4356885A (en) * | 1981-08-20 | 1982-11-02 | Dello Christy J | Chambered-core motorcycle-exhaust apparatus |
JP3712800B2 (en) * | 1996-09-20 | 2005-11-02 | 本田技研工業株式会社 | Exhaust system cover device for motorcycles |
JP2001123829A (en) * | 1999-10-25 | 2001-05-08 | Honda Motor Co Ltd | Mounting structure for cover member |
US6408980B1 (en) * | 2000-03-02 | 2002-06-25 | Mark W. Dooley | Exhaust pipe and muffler for motorcycle that does not heat discolor |
JP3493344B2 (en) | 2001-01-23 | 2004-02-03 | 川崎重工業株式会社 | Exhaust system for riding type rough terrain vehicle |
JP2002276356A (en) * | 2001-03-19 | 2002-09-25 | Mazda Motor Corp | Exhaust structure for on-vehicle engine |
JP3940053B2 (en) * | 2002-09-30 | 2007-07-04 | 本田技研工業株式会社 | Heat shield device for exhaust system of internal combustion engine |
US7263827B2 (en) * | 2003-04-04 | 2007-09-04 | Honda Motor Co., Ltd. | Exhaust pipe insulator attaching structure for saddle-riding vehicle |
JP2005171980A (en) * | 2003-11-19 | 2005-06-30 | Nakagawa Sangyo Kk | Setting structure of tail pipe for exhaust air |
JP2006070705A (en) * | 2004-08-31 | 2006-03-16 | Honda Motor Co Ltd | Exhaust system of vehicular engine |
JP2009108824A (en) * | 2007-10-31 | 2009-05-21 | Yamaha Motor Co Ltd | Motorcycle |
-
2010
- 2010-12-28 US US12/979,699 patent/US8215447B1/en active Active
-
2011
- 2011-12-23 CN CN201110436590.9A patent/CN102536409B/en active Active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150007554A1 (en) * | 2013-07-08 | 2015-01-08 | Honda Motor Co., Ltd. | Oxygen sensor heat sinking boss |
US9057315B2 (en) * | 2013-07-08 | 2015-06-16 | Honda Motor Co., Ltd. | Oxygen sensor heat sinking boss |
JP2017057789A (en) * | 2015-09-16 | 2017-03-23 | 本田技研工業株式会社 | Internal combustion engine exhaust system |
US20180178827A1 (en) * | 2016-12-27 | 2018-06-28 | Honda Motor Co., Ltd. | Vehicle |
US10543866B2 (en) * | 2016-12-27 | 2020-01-28 | Honda Motor Co., Ltd. | Vehicle |
Also Published As
Publication number | Publication date |
---|---|
CN102536409A (en) | 2012-07-04 |
CN102536409B (en) | 2014-09-17 |
US8215447B1 (en) | 2012-07-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7434656B2 (en) | Exhaust device for vehicle engine | |
US8459016B2 (en) | Exhaust manifold for internal combustion engine | |
US7484361B2 (en) | Exhaust gas purifying apparatus of motorcycle | |
EP1329606A2 (en) | Exhaust arrangement for internal combustion engine | |
US8215447B1 (en) | Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same | |
US8181733B2 (en) | Motorcycle equipped with an exhaust gas purifying apparatus with improved layout | |
JP4684916B2 (en) | Vehicle exhaust system | |
EP2050937A1 (en) | Exhaust gas purifying device for engine | |
US7770690B2 (en) | Double-flow exhaust system for an internal-combustion engine | |
US8443927B2 (en) | Exhaust device of vehicle and straddle-type four-wheeled vehicle provided with the same | |
EP2664761A1 (en) | Muffler unit for saddle-ride type vehicle | |
JP3497443B2 (en) | Engine exhaust system for vehicles | |
JP5513630B2 (en) | Exhaust system for saddle-ride type vehicles | |
JP5033721B2 (en) | V-type 4-cylinder engine exhaust system | |
US11408313B2 (en) | Exhaust device for internal combustion engine of saddled vehicle | |
JP5608530B2 (en) | Saddle riding | |
EP2703616A1 (en) | Method of making a vehicle | |
US11193404B2 (en) | Muffler structure of saddle-type vehicle | |
JP4089334B2 (en) | Breather device for vehicle engine | |
US11371401B2 (en) | Exhaust muffler | |
JP7061020B2 (en) | Exhaust system for saddle-mounted vehicles | |
WO2018180272A1 (en) | Saddle-type vehicle exhaust device | |
JP2001090530A (en) | Flexible tube for automobile exhaust system | |
JPH0333555B2 (en) | ||
WO2018061120A1 (en) | Exhaust device for saddled vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KAWASAKI JUKOGYO KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ORIHASHI, YOSHIHIKO;FUKUUCHI, MASASHI;ETO, ATSUSHI;AND OTHERS;SIGNING DATES FROM 20101214 TO 20101216;REEL/FRAME:025544/0303 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
AS | Assignment |
Owner name: KAWASAKI MOTORS, LTD., JAPAN Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:KAWASAKI JUKOGYO KABUSHIKI KAISHA;REEL/FRAME:060300/0504 Effective date: 20220520 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 12 |