MXPA02001359A

MXPA02001359A - Waste gas purifier of light motorcycle type vehicle.

Info

Publication number: MXPA02001359A
Application number: MXPA02001359A
Authority: MX
Inventors: Numata Hidehiko
Original assignee: Honda Motor Co Ltd
Priority date: 2001-02-09
Filing date: 2002-02-08
Publication date: 2002-10-21
Also published as: CN1369624A; CN1281855C; AR032549A1; JP2002235535A; TW514613B; JP3933875B2

Abstract

There is provided a sub-air cleaner by suppressing an increase of the number of parts. A rear wheel 21 is supported in a rear part of a swing type power unit 18 connected with a vehicle body frame so as to oscillate freely, and a rear fender 35 is arranged above the rear wheel 21 to support it on a rear frame 23. A case part of the sub-air cleaner 40 is integrally provided in a front part of the rear fender 35 and is connected with a secondary air control valve 42 supported on the rear frame 23 in front of it by a hose ignition coil 48, and the secondary air control valve 42 is connected with an exhaust passage of an engine 30 through a rubber hose 44 and a metallic pipe 45.

Description

¡Í¡S Éfcíí ' MOTORCYCLE TYPE VEHICLE EXHAUST GAS DEPURATOR

[0001] [Technical Field of the invention] The present invention relates to an exhaust gas purifier of a motor vehicle of the scooter type.

[0002] [Prior art] It is well known that an exhaust gas scrubber of an engine with a secondary air regulating valve and a 1C auxiliary air filter for supplying clean air to the secondary air regulating valve is provided to a motorcycle type vehicle having an oscillating type power unit and in the unexamined patent application published in Japan N °. Hei 6-50140, it 15 reveals structure that a secondary air regulating valve is attached to an exhaust pipe, an auxiliary air filter formed independently of other parts that is supported on the rear by the rear end of a body frame and a hose 20 connects this secondary air regulating valve and auxiliary air filter.

[0003] [Problems to be solved by the invention] However, as in the prior art, when the auxiliary air filter is provided independently, the number of parts comprising the auxiliary air filter, the supply of an auxiliary air filter, is increased. necessary support to join the auxiliary air filter to the side of the main frame and man-hours of assembly are also included. It is also convenient the device for an efficient placement of the auxiliary air filter in space in consideration of the characteristic of the motorcycle type vehicle and in addition, it is also convenient to improve the durability of the auxiliary air filter.

[0004] [Means for solving problems] In order to solve the problems, the invention disclosed in Claim 1 in connection with an exhaust gas cleaner of a scooter-type vehicle is based on a scooter-type vehicle configured in such a way that they integrate an engine and a transmission box, an oscillating-type power unit that supports a rear wheel on the rear of the transmission case is suspended from the back of a body and the exhaust gas is purified by feeding the air secondary of an auxiliary air filter to a engine exhaust duct via a secondary air regulating valve and characterized in that a rear bumper is placed on the rear wheel so that the rear bumper is supported by a main frame and an auxiliary air filter box is integrated with the Back defense.

[0005] The invention disclosed in Claim 2 is based on the invention disclosed in Claim 1 and is characterized in that an air filter for the intake of a motor is placed on the transmission box of the oscillating type power unit. and on one side of the rear wheel and the auxiliary air filter is placed on the inverted part of the body for the air filter with the rear wheel in the center.

[0006] The invention disclosed in Claim 3 is based on the invention disclosed in Claim 1 and is characterized in that an intake port of the auxiliary air filter is opened towards the rear of the body on the rear bumper.

[0007] [Effect of the invention] According to the invention disclosed in Claim 1, according to the air filter case auxiliary is integrated with the rear bumper, the increase in the number of parts per box can be reduced even if the auxiliary air filter is provided. In addition, since it is not necessary that the auxiliary air filter has independent support of the main frame, it is also possible to avoid the increase in man-hours of assembly.

[0008] According to the invention disclosed in Claim 2, since the air filter and the auxiliary air filter are separated on both sides of the body with the rear wheel in the center, the auxiliary air filter can be efficiently placed in the space using the characteristic of the motorcycle type vehicle.

[0009] According to the invention disclosed in Claim 3As the intake opening of the auxiliary air filter opens towards the rear of the body on the rear bumper, the auxiliary air filter can suck air on the rear bumper and for the most part free of dust and water made for that sprouts by the rear wheel and can extend a clean cycle of the air filter. [BRIEF DESCRIPTION OF THE DRAWINGS] [Fig. 1] Fig. 1 is a side view showing a motorcycle type vehicle to which the present embodiment is applied; [Fig. 2] Fig. 2 is a side view showing the internal structure in the rear part of the motorcycle-type vehicle body; [Fig. 3] Fig. 3 is a plane showing the same part; [Fig. 4] Fig. 4 is a sectional view showing an auxiliary air filter (a sectional view seen along a line 4-4 of Fig. 3); and [Fig. 5] Fig. 5 is an explanatory drawing to describe the action of the rear part of the scooter-type vehicle shown in Fig. 1. [Description of Reference Numbers] 11: Rear cover, 12 :. Seat, 14: Main frame, 15: Transverse tube, 17: Articulation, 18: Oscillating type power unit, 20: Swing center, 21: Rear wheel, 23: Rear frame, 30: Motor, 31: Transmission case , 32: Air filter, 33: Breathing tank, 35: Rear guard, 40: Auxiliary air filter, 42: Secondary air regulating valve, 44: Rubber hose, 45: Metal tube, 46: Exhaust pipe, 50: Box, 52: Air filter , 53: Top, 57: Admission channel.

[0010] [Preferred embodiment of the invention] With reference to the drawings, an embodiment will now be described. Fig. 1 is a side view showing a scooter-type vehicle to which this embodiment is applied, Fig. 2 shows the inner structure of the rear part of the scooter-type vehicle body, Fig. 3 is a plane showing the same part, Fig. 4 is a sectional view showing an auxiliary air filter (a sectional view seen along a line 4-4 in Fig. 3) and Fig. 5 shows the action on the side of the back of the body.

[0011] First, the entire body will be described in approximate form. A reference number 1 in Fig. 1 points to a front wheel, 2 points to a front fork, 3 is a front bumper, 4 points to a front metal cover, 5 points to a metal or resin rear front cover, 6 points to a front cover, handle resin, 7 indicates a headlight and 8 indicates a handlebar

[0012] The center of the body forms a low floor 10 that functions as a part to place the feet and in the rear part a rear cover 11 is provided that rises by a predetermined height upwards, it extends backwards, it is hollow and its upper and lower parts are open. The rear cover 11 is made of metal or resin and a top opening is opened or closed by a seat 12 long front and rear. A housing housing 13 opening upwards is provided inside the rear cover 11 and the interior has large capacity so that a large article such as a helmet fits.

[0013] A main frame 14 extends along the center of the body in front and behind and is made of a metal tube and a transverse tube 15 extending across its rear end is provided under the floor 10, an arm 19 extended forwardly from beneath an oscillating type power unit 18 is coupled to the rear end of the main frame 14 via an articulation 17 whose end is supported by the back support structure 16 protruding backward and the power unit of Oscillating type 18 can oscillate vertically with points for coupling these 20a and 20b in the center of the ing.

[0014] A rear wheel 21 receives support on one side of the rear end of the oscillating type power unit 18, a rear shock absorber unit 22 engages between the rear wheel -and a rear frame 23 and by means of this, the unit of oscillating type power 18 is suspended on the back of a main frame.

[0015] The rear frame 23 has a substantially U-shaped shape when seen from above, a pair of right and left parts from the front end to the rear part are provided from the front to the rear part -usually in parallel, the rear ends are integrated and each right and left front end is coupled to the cross tube 15. These main frame 14, transverse tube 15 and rear frame 23 are joined and form the main frame.

[0016] As shown in Fig. 2, a spare wheel mounting tube 24 exits forwardly from the rear end of the rear frame 23, extends outwardly from the rear of the rear cover 11 and supports a spare wheel 25 shown in Fig. 1.

[0017] An air-cooled four-cycle engine 30 in the front side and a transmission case 31 on the rear side are integrated into the oscillating type power unit 18, the motor 30 is inclined forward substantially horizontally, the entire oscillating type power unit 18 is formed along from the front to the rear part and the rear wheel 21 is supported on one side of the rear end of the transmission case 31.

[0018] An air filter 32 which is main as opposed to an auxiliary air filter described later to take air for the motor 30 is placed on top of the transmission case 31. A breather tank 33 is provided at the front end of the air filter 32 and a vent pipe 34 is connected to the tank. Breathing from an upper part of a cylinder head of the engine 30 so that the unburned gas from the engine 30 is transported in the breather tank through the tube and returns from the breather tank to a carburetor that is described later.

[0019] A rear fender 35 made of resin is placed on top of the rear wheel 21 and receives support from the rear frame 23. Its supporting structure is provided for the front and back part of the rear bumper 35, a mounting part 35 integrated with the front part and projecting upwards is joined to a support 27 that comes down from a transverse tube 26 of the rear frame 23 and a mounting part 37 integrated with the back part and exiting upwards joins a support 28 projecting downward from the rear end of the rear frame 23 by a bolt 38 and a nut 39.

[0020] As shown in Fig. 3, an auxiliary air filter 40 is integrated with the right side of the body which is the reverse side for the air filter 32 with the rear wheel 21 between the auxiliary air filter and the air filter at the front end of the rear bumper 35. A rubber hose 41 extends forward from the rear part. bottom of the filter of auxiliary air 40 and connected to a secondary air regulating valve for purifying the exhaust gas 42 positioned opposite the auxiliary air filter 40. ? Á? -? JL

[0021] An air shut-off valve to control the amount of air supplied and a comb valve which is a check valve for the countercurrent of the exhaust gas are fitted in the air regulating valve Secondary 42. The comb valve prevents the exhaust gas from an exhaust duct from flowing back to the air shut-off valve and the auxiliary air filter. The air shut-off valve is connected to the intake side of the engine via a negative pressure pipe 43, interrupts the secondary air supply to the exhaust duct when the engine speed is reduced and prevents further combustion in an exhaust pipe.

[0022] The secondary air regulating valve 42 and the engine 30 are connected via a rubber hose 44 and a metal tube 45. In Fig. 3, the rubber hose 44 curves forward convexly, crosses right to the left on the motor 30, in a side view of FIG. 2 takes substantially V-shaped, one end extends diagonally upwardly back on the right side of the body and connects to a joint 42a (shown in FIG. 3) which is provided on the front face of one end of the front of the secondary air regulating valve 42. The union 42a of the regulating valve of The secondary air 42 projects integrally diagonally downwardly from the front of the secondary air regulating valve 42 so that a direction of movement substantially equals one direction (one direction being shown by an arrow A in Fig. 2). ) of the movement according to the swinging of the oscillating type power unit 18 of the rubber hose 44.

[0023] The other end extends to the left side of the motor 30, it bends diagonally backwards and diagonally downwards on the left side of the motor 30 as seen in FIG. 2, it is connected to one end of the metal tube 45 via a joint 45a and is secured by means of a fastener 45b as shown in FIG. shown in Fig. 3 to prevent it from coming loose. The orientation of the joint 45a is substantially the same as one direction (one direction shown by an arrow B in Fig. 2) in which the upper end of the metal tube 45 is suspended together with. the oscillating type power unit 18.

[0024] The metallic tube 45 extends vertically on the left side of the motor 30, the other end is bent on the side of the lower part of the motor 30 and is TÁ.¿.ii JáJi i. f - a < m- «t ^ 1Mj¡tiJ ^ t. AA -t connects to the exhaust duct of the engine 30. An end of an exhaust pipe 46 is connected to this exhaust duct of the engine 30. The exhaust pipe 46 extends to the right side of the body from below the engine 30 and is connects to an exhaust pipe 47 placed on the right side of the rear wheel 21. The exhaust pipe 47 is located below the auxiliary air filter 40-.

[0025] The secondary air regulating valve 42 is attached to a valve support 29 projecting downwardly from the rear frame 23 on the right side of the body. An ignition coil 48 is supported by a portion that continues to the valve support 29, a high-tension line 49 extends forward from the ignition coil 48 and is connected to a spark plug of the 4-cycle engine 30 cooled by air.

[0026] As seen in Fig. 4, a box 50 of the auxiliary air filter 40 integrates with the rear bumper 35, a connecting tube 51 projecting downwards integrates with the front end of the lower part and a The end of the hose 41 is connected from the side of the lower part of the connecting tube.

[0027] The box 50 is opened - upwards, a filter of air 52 is received in an opening, a cover 53 is closed from above the opening and is integrated into the box 50 by means of a bolt 54 inserted from below. The auxiliary air filter 40 is divided into a lower clean compartment 55 and an upper dirty compartment 56 by the air filter 52.

[0028] An intake channel 57 integrated with the cover 53 is connected to the dirty compartment 56. The channel of inlet 57 extends backward horizontally from the center of lid 53, protrudes rearwardly from the rear face of lid 53 ,. it opens rearward on the rear bumper 35 and sucks air into the rear bumper 35 from the rear. The air transported in the dirty compartment 56 through the intake channel 57 is purified when the air is transported to the clean compartment 55 through the air filter 52 and is fed to the secondary air regulating valve 42 so that it becomes clean air .

[0029] A reference number 60 in Fig. 3 points to a connecting tube and 61 points to a carburetor. The rear end of the connecting tube 60 is connected to the front of the air filter 32, communicates with its clean compartment and the front end is connected to the carburetor 61. A thin tube 62 extending from the breather tank 33 is connected to the intermediate part of the connecting tube so that the gas in the breather tank is returned to the carburetor 61. The carburetor 61 is connected to a motor intake duct 30.

[0030] As seen in Fig. 5, the front side of the rear cover 11 can be turned upwards together with the seat 12 with a pivot 23a supplied to the rear end of the rear frame 23 in the center, the overturned condition can be maintained by a support 63 and a part placed within the rear cover 11, which is described later and related to the oscillating type power unit, can be maintained. In addition, a reference number 64 appearing in Fig. 2 indicates a fuel tank, which is located above the rear bumper 35 and receives support from the rear part of the rear frame 23. In a condition where the Support 63, the front end supports the frame and the rear end supports the rear bumper.

[0031] The action of this embodiment will be described below. As is clear in Figs. 3 and 4, since the box 50 of the auxiliary air filter 40 is integrated with the rear bumper 35, it is not necessary that the auxiliary air filter 40 be supplied independently and the increase in the number of parts can be avoided. Further, as only the coupling of the rear bumper 35 to the rear frame 23 is required without holding the auxiliary air filter 40 to the rear frame 23h. , a special mounting element is not necessary for the auxiliary air filter such as a support, the number of parts can be reduced and also the increase of man-hours of assembly can be avoided.

[0032] Also, since the auxiliary air filter 40 and the air filter 32 are separated on the right and left sides of the body with the rear wheel 21 in the center, the auxiliary air filter 40 can be efficiently positioned using the a scooter-type vehicle having relatively large space for an article to be placed on the right side of the rear shock absorber unit 22 and above the exhaust pipe 47.

[0033] Also, as seen in FIG. 4, as the intake channel 57 of the auxiliary air filter 40 supplied to the right of the front end of the rear bumper 35 near the inside of the right wall of the rear cover 11 opens rearward on the rear bumper 35, the auxiliary air filter sucks the air from the space surrounded by the rear cover 11 and the rear bumper 35. both, since the auxiliary air filter can suck air with difficulty including dust and water made to sprout from the rear wheel 21 and relatively free of dirt, for the most part it prevents the air filter 52 from being clogged and can be extended. clean cycle of the air filter 52.

[0034] Also as seen in Figs. 2 and 3, as the rubber hose 44 connects the suspended metal tube 45 together with the oscillating type power unit 18 and the secondary air regulating valve 42 is fixed to the side of the rear frame 23 and is placed from right to left on the motor 30, it curves forward convexly when the rubber hose is seen from above, the deformation of the long curve of the rubber hose 44 can easily absorb the change of an interval between the upper end of the metal tube 45 according to the swing of the oscillating type power unit 18 and the secondary air regulating valve 42.

[0035] Further, as seen in Fig. 2, as the rubber hose 44 bends V-shaped when viewed laterally and on the side of the secondary air regulating valve 42, the direction (the direction shown with the arrow A) in which the rubber hose 44 moves to the right in accordance with the swing of the oscillating type power unit 18 and the output direction of the junction 42a are substantially equal, the entanglement in a connection is reduced and it is almost impossible for the rubber hose to be disconnected.

[0036] Also, on the side of the metal tube 45, the entanglement of a connection is reduced by substantially equalizing the orientation of the joint 45a to the rolling direction (the direction shown by an arrow B) and it is almost certain that it prevents the rubber hose from disconnecting. Therefore, an entanglement in a connection in the secondary air pipe of an exhaust gas cleaner is reduced which is a characteristic phenomenon caused by adopting the oscillating type power unit 18, and it is almost certain that the Rubber hose is disconnected and the reliable connection structure is obtained.

[0037] In addition, as the air regulating valve secondary 42 is fixed to the rear frame 23, only a portion proximate to the balancing centers 20a and 20b is balanced and as a result, as the amount of oscillation is reduced, intubation is facilitated. However, the secondary air regulating valve 42 can be provided arbitrarily on the side of the oscillating type power unit 18 such as the exhaust pipe 47 as in the prior art. Instead of the rubber hose 44, an elastic tube such as a hose and a flexible tube can be used and made of metal or elastic resin.

Claims

[CLAIMS] [Claim 1] An exhaust gas scrubber of a scooter-type vehicle configured so as to integrate an engine and a transmission case, an oscillating-type power unit that supports a rear wheel on the rear of the transmission box is suspended from the rear of a body and the exhaust gas is purified by feeding the secondary air from an auxiliary air filter in an exhaust duct of a motor via a secondary air regulating valve, where: a Rear bumper is placed on top of the rear wheel so that the rear bumper is supported by a main frame; and an auxiliary air filter box integrates with the rear bumper. [Claim 2] An exhaust gas purifier of a motorcycle-type vehicle according to claim 1, wherein: an air filter for the intake of a motor is placed on the transmission case of the oscillating type power unit. and to one side of a rear wheel; and the auxiliary air filter is placed on inverted side of the body for the air filter with the wheel

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[Claim 3] An exhaust gas cleaner of a motorcycle-type vehicle according to claim 1, wherein: an intake opening of the auxiliary air filter opens towards the rear of the body on the rear bumper.