CN113153589B

CN113153589B - Motorcycle air intake and exhaust control system and motorcycle

Info

Publication number: CN113153589B
Application number: CN202110458540.4A
Authority: CN
Inventors: 赵玉晓; 王贵富; 温智晖; 左支柳; 黄广龙
Original assignee: WUYANG-HONDA MOTORS (GUANGZHOU) CO LTD
Current assignee: WUYANG-HONDA MOTORS (GUANGZHOU) CO LTD
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2022-10-28
Anticipated expiration: 2041-04-27
Also published as: CN113153589A

Abstract

The invention discloses a motorcycle air intake and exhaust control system and a motorcycle, wherein the motorcycle air intake and exhaust control system comprises an air intake mechanism, an engine and an exhaust mechanism which are sequentially connected; the air inlet mechanism comprises an air filter, the exhaust mechanism comprises a first exhaust pipe and a conversion discharge assembly, the air filter, the engine, the first exhaust pipe and the conversion discharge assembly are sequentially connected, the length of the first exhaust pipe is 250-480 mm, and the effect of reducing the discharge amount of the motorcycle is achieved. And the clapboard in the air filter inclines towards the rear of the motorcycle and forms an included angle alpha with a vertical surface where the center line of the motorcycle is located, the filter element inclines towards the rear of the motorcycle and forms an included angle beta with the clapboard, the filter element inclines towards the rear of the motorcycle and forms an included angle beta with the vertical surface where the center line of the motorcycle is located, the included angle between the filter element and the vertical surface is the sum of alpha and beta, the air inlet efficiency of the air filter is sequentially increased, and the performance of the engine is improved to make up for the performance loss influence of an exhaust mechanism on the engine. The motorcycle can detach the air cleaner from the side.

Description

Motorcycle air intake and exhaust control system and motorcycle

Technical Field

The invention belongs to the technical field of motorcycle air intake and exhaust control systems, and particularly relates to a motorcycle air intake and exhaust control system and a motorcycle.

Background

With the gradual improvement of social and economic level and environmental protection requirements, the emission standard of the motorcycle is increasingly strict. European union regulations specifically state that new certified motorcycles are mandatory to enforce euro V emissions regulations since 2020. To meet the euro V emission limits for motorcycle products, improvements and enhancements to emission control strategies for motorcycles are needed. The common exhaust structure improvement mode is that the precious metal content of the catalyst in the catalytic converter on the exhaust pipe is adjusted to improve the effect of the catalyst, but the precious metal content in the catalyst is increased to increase the cost and reduce the utilization efficiency of the precious metal.

The existing straddle type motorcycle installs an air filter at the rear side of an engine, and in a triangular area surrounded by a main pipe, two side pipes and two upper pipes of a frame. Limited by this triangle region, air cleaner's filter core area is less, and intake efficiency is lower, and then leads to whole car power low, and dynamic behavior is poor.

In summary, there is a need for an intake and exhaust control system for a motorcycle, which can reduce the pollutant emission of the motorcycle, compensate for the power loss of the motorcycle due to the emission reduction, and even improve the power output of the motorcycle engine.

Disclosure of Invention

The invention aims to provide an intake and exhaust control system of a motorcycle, which improves the utilization efficiency of precious metals and reduces the emission by shortening the distance between a catalytic converter and an engine. Meanwhile, in a limited installation space, the structure of the air filter is changed, the air inlet efficiency is improved, and the performance of the engine is improved.

The invention is realized by the following technical scheme:

a motorcycle advances the exhaust control system, including air admission organization, engine and exhaust mechanism connected sequentially; the air inlet mechanism comprises an air filter, the air filter comprises a shell, a cover body, a partition plate and a filter element, the cover body and the shell are detachably buckled and combined in the shell to form a closed inner cavity, the partition plate divides the closed inner cavity into a pre-filter cavity and a post-filter cavity, a boss is formed on the partition plate, a through groove for communicating the pre-filter cavity with the post-filter cavity is formed in the surface of the boss, the filter element is installed on the surface of the boss and covers a notch of the through groove, the partition plate inclines towards the rear of the motorcycle and forms an included angle alpha with a vertical surface where a motorcycle center line is located, the filter element inclines towards the rear of the motorcycle and forms an included angle beta with the partition plate, and the filter element inclines towards the rear of the motorcycle and forms a sum of alpha and beta with the vertical surface where the motorcycle center line is located;

a first air inlet pipe communicated with the pre-filter cavity is arranged on the cover body and is used for being communicated with the outside to obtain air, a second air inlet pipe communicated with the post-filter cavity is arranged on the shell, and the other end of the second air inlet pipe is connected with an engine;

the exhaust mechanism comprises a first exhaust pipe and a conversion exhaust assembly, the conversion exhaust assembly is connected with the engine through the first exhaust pipe, and the length of the first exhaust pipe is 250-480 mm.

Through the scheme, the invention at least obtains the following technical effects:

the motorcycle air intake and exhaust control system shortens the response time of three-way catalytic conversion in the conversion and exhaust assembly by shortening the distance between the exhaust port of the engine and the conversion and exhaust assembly loaded with the catalyst, and reaches the activation temperature of the catalyst as soon as possible. And simultaneously, the conversion exhaust component and the exhaust port of the engine should be kept at a safe distance to avoid the failure of the noble metal caused by overhigh catalyst combustion temperature. A large number of experiments prove that the length of the first exhaust pipe, namely the distance between the exhaust port of the engine and the conversion exhaust component, is kept to be 250-480 mm most appropriately, and the emission of the motorcycle is reduced on the premise of not increasing the total amount of the catalyst or the content of noble metals.

As the length of the first exhaust pipe is shortened, the exhaust resistance of the engine increases and the output power thereof decreases. Therefore, the air filter is improved, the air inlet efficiency of the air filter is improved, and the power output capacity of the engine is further improved.

The air intake of the air filter is related to the area and the setting angle of the filter element. After the air got into through first intake pipe and strains the front cavity, the filter core was close the vertical relation more with the air flow direction then the inlet efficiency is higher, and the engine could obtain more sufficient air lifting performance. Therefore, the deflection angle of the filter element is increased, so that the filter element and the air flow direction are closer to the vertical relation, the air inlet efficiency of the air filter is enhanced, and the output power of an engine is improved; meanwhile, the partition board for installing the filter element is provided with an alpha angle, the limited triangular installation plane is changed into an inclined plane, the sectional area of the partition board is increased, the area of the filter element is correspondingly increased, and the air inlet efficiency is further improved.

The scheme for increasing the deflection angle of the filter element comprises the following steps: because the included angle beta between the filter element and the clapboard is limited by the width of the motorcycle, the boundary of the shell of the air filter is indirectly influenced, and only small-angle adjustment can be carried out, therefore, the clapboard which is used as a two-cavity separation structure is integrally deflected, so that the included angle alpha is formed between the clapboard and the plane where the motorcycle central line is positioned, and the included angle beta is formed between the filter element and the clapboard, so that the included angle of the sum of alpha and beta is formed between the filter element and the plane where the motorcycle central line is positioned. So as to increase the air intake efficiency of the air filter and make up for the loss of the engine performance caused by reducing the discharge amount.

Preferably, the filter element inclines towards the ground, and an included angle theta is formed between the filter element and the partition plate.

Preferably, said angle α ranges from 0 ° to 20 °.

Preferably, the peripheral edges of the cover body and the shell are provided with grooves, the peripheral edges of the partition plate are provided with flanges protruding out of the surfaces of the two sides of the partition plate, the flanges are embedded into the grooves of the shell and the cover body on the two sides, and sealing strips are filled at the embedding positions of the flanges and the grooves.

Preferably, the circumferential outer wall surface of the shell is provided with a baffle, and the baffle covers a buckling gap between the shell and the cover body.

Preferably, the conversion and discharge assembly is formed by sequentially connecting a first catalytic converter, a second exhaust pipe, a second catalytic converter and a silencing barrel; the first catalytic converter is connected to a first exhaust pipe.

Preferably, three silencing chambers are arranged inside the silencing barrel, and the three silencing chambers are communicated with each other in pairs.

Preferably, an anti-scald shield is arranged on the periphery of the first catalytic converter.

Preferably, at least one catalytic conversion unit is arranged inside each of the first catalytic converter and the second catalytic converter,

the invention also aims to provide the motorcycle, and the air filter is arranged in the motorcycle from the side, so that the motorcycle is convenient to disassemble, clean, maintain and repair.

The invention is realized by the following technical scheme:

the motorcycle comprises a frame and the motorcycle air inlet and exhaust control system in the scheme, wherein the frame comprises a triangular area formed by enclosing a main pipe, a side pipe and an upper pipe, and an air filter is arranged in the triangular area; the shell of the air filter is fixed in the triangular area, and the cover body of the air filter is buckled on the shell from the side of the frame.

after the motorcycle is provided with the motorcycle air intake and exhaust control system, the emission of the motorcycle can be reduced on the premise of not increasing the content of noble metals in the catalyst. And, on the premise of not increasing the outline of the air cleaner, through the inclined plane setting of the baffle, enlarge the filter element area, increase the inclination of filter element in order to promote air intake efficiency simultaneously, strengthen the power take off of engine, compensate the engine performance because of reducing the emission and losing. Especially, after the air filter is improved to be provided with the cover body from the side, the disassembly and cleaning steps of the air filter can be optimized, and the maintenance efficiency is improved.

The invention has the beneficial effects that:

by keeping a proper distance between the exhaust port of the engine and the conversion exhaust component, the emission of the motorcycle is reduced on the premise of not increasing the total amount of a catalyst or the content of noble metals, and the Euro V emission standard is met. And the mode of increasing the inclination angle of the filter element in the air filter promotes the air inlet efficiency, enhances the performance of the engine, and makes up the loss of the performance of the engine caused by reducing the discharge amount of pollutants. And even the power output of the motorcycle engine can be improved.

Drawings

Fig. 1 is a schematic view of a motorcycle according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an intake and exhaust control system of a motorcycle according to an embodiment of the present invention.

Fig. 3 is a disassembled schematic view of an air cleaner according to an embodiment of the present invention.

Fig. 4 is a schematic view of a filter cartridge in an inclined state according to an embodiment of the present invention.

Fig. 5 is a schematic view illustrating an included angle β formed between the filter element and the partition plate and an included angle α formed between the partition plate and the XZ plane according to an embodiment of the present invention.

Fig. 6 is a schematic view of an included angle θ formed between a filter element and a partition plate according to an embodiment of the present invention.

Fig. 7 is a partially enlarged cross-sectional view of a fastening portion of the housing and the cover according to an embodiment of the invention.

Fig. 8 is a schematic structural view of a motorcycle frame equipped with an air cleaner according to an embodiment of the present invention.

Fig. 9 is a graph showing the change of the emission value of the emission pollutant HC with time according to an embodiment of the present invention.

Fig. 10 is a graph comparing the output level of a motorcycle equipped with the air intake control system of the present invention provided in one embodiment with the output level of a conventional motorcycle.

Fig. 11 is a graph comparing intake resistance of an air cleaner of the present invention provided in an embodiment of the present invention with a conventional air cleaner.

Legend:

1 an air filter; 2, an engine; 3, an exhaust mechanism; 4, a frame;

11 a housing; 12 a cover body; 13 a partition plate; 14 a filter element; 15 a pre-filter cavity; 16 post-filter chamber; 17 a boss; 18 a first intake pipe; 19 a second intake pipe;

31 a first exhaust pipe; 32 a first catalytic converter; 33 a second exhaust pipe; 34 a second catalytic converter; 35 a silencing barrel;

41 a main pipe; a 42-side tube; 43 an upper pipe;

111 grooves; 112 a baffle plate;

131 flanges; 132 a sealing strip;

191 an air throttle;

321 anti-burn shield; 322 a catalytic conversion unit;

351 sound deadening chamber.

Detailed Description

The invention is further illustrated by the following figures and examples.

Example 1:

for clarity of description of the arrangement angles of the filter element 14 and the partition plate 13, the embodiment is described by introducing a three-dimensional coordinate system. The motorcycle center line is taken as an X axis, a Y axis vertical to the X axis in a horizontal plane, and a Z axis vertical to the horizontal plane.

The advancing direction of the motorcycle is parallel to the X-axis, and the negative direction of the X-axis is set to be the same as the advancing direction of the motorcycle in this embodiment.

The vertical plane of the motorcycle central line is an XZ plane, namely a base plane forming an included angle with the filter element 14 and the partition plate 13;

the plane perpendicular to the center line of the motorcycle is a YZ plane, namely a projection plane of the filter element 14;

the ground surface is an XY surface.

As shown in fig. 1 and 2, the present embodiment provides a motorcycle intake and exhaust control system including an intake mechanism, an engine 2, and an exhaust mechanism 3.

The intake mechanism includes an air cleaner 1, a throttle valve 191, a first intake pipe 18, and a second intake pipe 19. The first intake pipe 18 and the second intake pipe 19 are connected to an air inlet and an air outlet of the air cleaner 1, respectively, and the throttle valve 191 is installed on the second intake pipe 19. The exhaust mechanism 3 includes a first exhaust pipe 31 and a conversion exhaust component, and the conversion exhaust component is formed by connecting a first catalytic converter 32, a second exhaust pipe 33, a second catalytic converter 34 and a silencing pot 35 in sequence. The other end of the second intake pipe 19 is connected to an intake port of the engine 2, and both ends of the first exhaust pipe 31 are connected to an exhaust port of the engine 2 and a first catalytic converter 32, respectively.

Air enters the air cleaner 1 from the first air inlet pipe 18, flows into the engine 2 from the second air inlet pipe 19 after being filtered, and the air quantity entering the engine 2 can be regulated and controlled by a throttle valve 191 arranged on the second air inlet pipe 19. Exhaust gas generated by the operation of the engine 2 flows from the first exhaust pipe 31 into the first catalytic converter 32. The catalyst containing noble metal is arranged in the first catalytic converter 32, the three-way catalytic conversion response of the catalyst is excited after the exhaust gas enters, and the exhaust gas is treated through the catalytic reaction of the catalyst, so that the pollutant level in the exhaust emission of the motorcycle is reduced. In this embodiment, the second catalytic converter 34 is provided to perform a secondary catalytic treatment of the gas discharged from the first catalytic converter 32, thereby further reducing the amount of emissions. The gas after the secondary treatment is finally discharged through the silencing pot 35, and the silencing pot 35 is used for reducing noise during exhaust emission.

The distance between the first catalytic converter 32 and the exhaust port of the engine 2, i.e., the length of the first exhaust pipe 31, is maintained between 250mm and 480mm. Compared with a longer first exhaust pipe 31 structure, the length of the first exhaust pipe 31 of the embodiment can shorten the response time of three-way catalytic conversion, accelerate the catalyst activation temperature, advance the catalytic reaction, and be more beneficial to exhaust gas treatment. Compared with a shorter first exhaust pipe 31 structure, the length of the first exhaust pipe 31 of the embodiment can avoid the problem that the noble metal is invalid due to overhigh catalytic combustion temperature, and the reduction of the waste gas treatment capacity is avoided.

As shown in fig. 9, the present embodiment provides a set of experimental comparison data demonstrating the variation with time of the emission level of cold engine start-up emission of HC produced by a motorcycle equipped with two lengths of the first exhaust pipe 31 under the WMTC cycle condition for the first 200 s. Wherein the solid line is the control group without catalyst, the dotted line is the HC value of the exhaust pollutant produced by the motorcycle with the first exhaust pipe 31 having a length of 255mm, and the dotted line is the HC value of the exhaust pollutant produced by the motorcycle with the first exhaust pipe 31 having a length of 634 mm. In the initial stage, the HC values of the three discharged pollutants are close to coincidence because the three-way catalytic conversion response time is not reached. When the catalytic reaction was initiated, the data would have a clear tendency to fall back. As can be seen from fig. 1, the motorcycle with the 255mm length of the first exhaust pipe 31 represented by the dotted line produces an exhaust pollutant HC value earlier than that of the motorcycle with the 634mm length of the first exhaust pipe 31 represented by the dotted line. The length of the first exhaust pipe is 255mm, so that the three-way catalytic conversion response time is shortened, the reaction speed is accelerated, and the emission reduction effect is enhanced.

Since the length of the first exhaust pipe 31 is shortened, exhaust resistance when exhaust gas is discharged from the engine 2 to the outside inevitably increases, thereby affecting the performance of the engine 2. To compensate for the performance loss of the engine 2 caused by changing the length of the first exhaust pipe 31, the present embodiment improves the performance of the engine 2 by increasing the intake efficiency of the air cleaner 1.

As shown in fig. 3, 4, and 5, the air cleaner 1 of the present embodiment includes a housing 11, a cover 12, a partition 13, and a filter element 14. The shell 11 and the cover body 12 are detachably buckled into a whole with a hollow inner part, a closed cavity is formed inside the shell, and the closed cavity is divided into a pre-filtering cavity 15 and a post-filtering cavity 16 by the partition plate 13. The partition plate 13 is formed with a boss 17 for mounting the filter cartridge 14, and the shape of the boss 17 is determined according to the mounting angle of the filter cartridge 14. The surface of the boss 17 is provided with a through groove which is communicated with a pre-filter cavity 15 and a post-filter cavity 16 at two sides of the partition plate 13, and the through groove between the two cavities is a unique channel. The filter element 14 is mounted on the surface of the boss 17, and the filter element 14 covers the notch of the through slot, so that the air in the pre-filter cavity 15 flows to the post-filter cavity 16 and must pass through the filter structure of the filter element 14. One end of the first air inlet pipe 18 is mounted on the outer wall of the cover 12 and penetrates through the cover 12 to be communicated with the pre-filter cavity 15, and the other end of the first air inlet pipe faces the rear of the motorcycle and is used for allowing outside air to enter. One end of the second air inlet pipe 19 is mounted on the casing 11 and penetrates through the casing 11 to be communicated with the post-filter cavity 16, and the other end of the second air inlet pipe is connected with an air inlet of the engine 2, so that air filtered by the filter element 14 in the post-filter cavity 16 is input into the engine 2.

In order to increase the projection area of the filter element 14 on the YZ plane, the filter element 14 is more nearly perpendicular to the air flowing direction, so that the air passing rate is increased, and an included angle beta is formed between the filter element 14 and the partition plate 13. On the premise of not exceeding 90 °, the larger the β angle is, the larger the projection of the filter element 14 on the YZ plane is, i.e., the larger the width of the filter hole on the filter element 14 is, the smaller the resistance of air passing through the filter element 14 is, and the higher the air intake efficiency is.

However, if the space between the partition plate 13 and the inner wall of the lid 12 is kept constant as the angle β increases, the filter element 14 reaches the limit positions where both sides abut against the partition plate 13 and the lid 12, respectively. In the structure of the conventional air cleaner 1, the distance between the partition plate 13 and the cover 12 is smaller than the width of the filter element 14, that is, the filter element 14 still cannot be perpendicular to the air flow direction in the space, and the air intake efficiency is limited. Therefore, in the present embodiment, the partition plate 13 is synchronously tilted, so that the plate surface of the partition plate 13 forms the included angle α with the XZ surface. The angle between the filter element 14 and the XZ plane is now the sum of α and β. On the premise of not exceeding 90 degrees, the larger the sum of alpha and beta is, the larger the projection area of the filter element 14 on the YZ plane is, i.e. the larger the width of the filter holes on the filter element 14 is, the smaller the resistance of air passing through the filter element 14 is, and the higher the air intake efficiency is.

It is worth mentioning that the baffle 13 is obliquely arranged, so that the volume of the rear filter cavity 16 is increased, and the second air inlet pipe 19 can be freely adjusted in length and pipe diameter according to the performance requirements of the motorcycle. By adjusting the length and the pipe diameter of the second air inlet pipe 19 to appropriate values, the pulsation effect of the air intake of the engine 2 can be fully utilized, the air intake noise is reduced, and the air intake efficiency is improved.

As shown in fig. 10, the present embodiment provides a set of experimental comparison data to prove the comparison relationship between the output level of the motorcycle equipped with the air intake mechanism of the present embodiment and the output level of the conventional motorcycle at the same speed. Wherein, the solid line is the output level data of the conventional motorcycle, and the dotted line is the output level data of the motorcycle carrying the air inlet mechanism of the embodiment. As can be seen from the figure, the motorcycle mounted with the intake mechanism of the present embodiment has a higher level of output force, i.e., has a higher power performance, at the same speed.

As shown in fig. 11, the present embodiment provides a set of experimental comparison data to prove the intake resistance comparison relationship between the air cleaner of the present embodiment and the conventional air cleaner. In which the solid line is intake resistance data of the conventional air cleaner and the broken line is intake resistance data of the air cleaner of the present embodiment. It can be seen from the figure that, under the same air volume flow, the air intake resistance of the air filter of the embodiment is far lower than that of the conventional air filter, and the air intake resistance is smaller, so that the air intake efficiency is more favorably improved.

Example 2:

in order to prevent the dust and silt filtered by the filter element 14 from blocking the filter holes on the filter element 14 and influencing the air inlet efficiency. In this embodiment, the installation angle of the filter element 14 is optimally adjusted again based on embodiment 1.

As shown in fig. 6, the filter element 14 is inclined toward the XY plane and forms an angle θ with the partition 13 or the XZ plane. The included angle between the filter element 14 and the XY surface, namely the ground, is 90-theta, and the larger the theta angle is, the larger the projection area of the filter element 14 on the XY surface is. The vibration of the motorcycle body generated in the driving process of the motorcycle and the gravity effect act together, so that dust and silt adhered to the filter element 14 can be shaken off and accumulated at the bottom of the pre-filter cavity 15. During maintenance of the air filter 1, the pre-filter chamber 15 is cleaned. The filter holes of the filter element 14 can be ensured to be smooth, and the air inlet efficiency is not damaged. Since an increase in the angle θ reduces the projected area of the filter element 14 in the YZ plane, and the filter element 14 is blocked by the cover 12, the angle θ should be limited to a range of 0 ° to 10 °.

Example 3:

in order to simplify the maintenance steps of the air cleaner 1 and facilitate the disassembly and cleaning of the air cleaner 1, the present embodiment optimizes the connection manner among the housing 11, the cover 12, and the partition plate 13 based on embodiment 1 or embodiment 2.

As shown in fig. 3 and 7, first, the installation manner of the partition plate 13 is optimized, the circumferential edge of the partition plate 13 is inserted into the engagement gap between the cover 12 and the housing 11, and when the cover 12 is removed, the partition plate 13 can be removed for cleaning and the inside of the housing 11 can be cleaned and maintained.

Since the partition 13 forms an angle α with the XZ plane, in order to achieve a scheme of interposing the partition 13 in the engagement gap between the cover and the case 11, it is necessary to adjust the edge shapes of the case 11 and the lid 12 so that the joint surface between the case 11 and the lid 12 is parallel to the partition 13. Further, since the air cleaner 1 is mounted in a narrow triangular area of the motorcycle frame 4, if the angle α is too large, the cover 12 is difficult to be detached, and the post-filter chamber 16 is too narrow, which affects the mounting of the second intake duct 19. Thus, the angular range of α is limited to between 0 ° and 20 °. In this embodiment, a scheme in which α is 10 ° is selected in consideration of the air intake efficiency of the filter element 14, the degree of convenience in detaching the cover 12, and the installation space of the second air intake pipe 19. While the sum of β and α should be less than or equal to 30 ° to avoid over-tilting and instead reduce the projected area of the filter element 14, the angular range of β should be limited to between 0 ° and 10 °.

Set up baffle 13 into detachable construction among the above-mentioned scheme, may influence the gas tightness of straining preceding chamber 15 or straining back chamber 16, consequently, need consolidate and seal to the circumference edge of baffle 13, make baffle 13 can keep installation stability under the motorcycle vibrational state, can ensure the sealed effect of two cavities again, avoid straining preceding chamber 15 or straining the problem that back chamber 16 appears leaking gas.

A groove 111 is formed in the circumferential edges of the lid 12 and the case 11, and a flange 131 protruding to both sides is formed in the circumferential edge of the partition plate 13. When the cover 12 is fastened to the housing 11, the two protruding parts of the flange 131 are simultaneously inserted into the groove 111 on the cover 12 and the groove 111 on the housing 11, so as to form a stable matching structure similar to a T-shaped groove and a T-shaped connector, thereby enhancing the installation stability of the partition 13. The sealing strip 132 is added at the embedded part of the flange 131 and the two grooves 111, so that the sealing effect can be effectively improved, and the problem of air leakage of the pre-filter cavity 15 or the post-filter cavity 16 can be prevented.

When the motorcycle is running, a large amount of dust and silt are attached to the outer surfaces of the motorcycle body and the air cleaner 1. When the air cleaner 1 is disassembled for maintenance, dust and sand may fall into the inside of the air cleaner 1. Therefore, a baffle 112 is provided on the outer wall surface of the housing 11, and the baffle 112 protrudes along the circumferential edge of the interface between the housing 11 and the lid 12, so as to cover the engagement gap between the housing 11 and the lid 12. Prevent to pile up dust and silt in the gap, avoid piling up dust and silt in the gap when opening lid 12 and fall into air cleaner 1 inner chamber.

Example 4:

on the basis of embodiment 1, embodiment 2 or embodiment 3, the present embodiment optimizes the structure of the exhaust mechanism 3 to improve the overall performance of the intake and exhaust control system of the motorcycle.

As shown in fig. 1 and 2, first, the interior of the silencing tube 35 is divided into three silencing chambers 351, and the three silencing chambers 351 are communicated with each other in pairs to form a plurality of airflow channels, so that the blockage can be avoided, and the noise can be effectively reduced.

Secondly, since the first catalytic converter 32 is located closer to the engine 2, it is also closer to the body of the rider of the motorcycle. Therefore, in order to prevent the driver from being scalded by the high temperature of the catalyst burning in the first catalytic converter 32, in the embodiment, the anti-scalding shield 321 is disposed at the periphery of the first catalytic converter 32.

Finally, in order to increase contact between the exhaust gas discharged from the engine 2 and the catalyst, each of the first catalytic converter 32 and the second catalytic converter 34 is provided in a structure in which a plurality of catalytic conversion units 322 are combined. That is, each catalytic conversion unit 322 is an independent chamber, and each chamber is provided with a catalyst. The waste gas continuously passes through the plurality of chambers and is in contact reaction with the catalyst in the chambers, so that the emission reduction effect can be enhanced.

Example 5:

on the basis of embodiment 1, embodiment 2, embodiment 3 or embodiment 4, the present embodiment proposes a motorcycle, which includes a frame 4 and a motorcycle intake and exhaust control system in any of the above embodiments.

As shown in fig. 3 and 8, the frame 4 mainly includes a triangular region surrounded by a main pipe 41, a side pipe 42, and an upper pipe 43, and the triangular region serves as a mounting position of the air cleaner 1. The case 11 of the air cleaner 1 is partially fitted into the triangular region and fixed, and the opening of the case 11 faces the side of the motorcycle, so that the lid 12 can be fastened to the case 11 from the side of the motorcycle. The mounting structure can maintain and clean the inside of the air filter 1 by only dismounting the cover body 12 from the side of the motorcycle on the premise of not integrally dismounting the air filter 1, thereby simplifying the maintenance steps.

Moreover, because the cover body 12 of the air filter 1 is positioned on the side of the motorcycle, the first air inlet pipe 18 can protrude out of the side surface of the motorcycle, so that the pipe orifice of the first air inlet pipe 18 is ensured not to be shielded, and the air inflow is improved. And the first intake pipe 18 can be extended without being restrained by the frame 4 to reduce noise.

Various technical features in the above embodiments may be arbitrarily combined as long as there is no conflict or contradiction in the combination between the features, but is limited to the space and is not described one by one.

The present invention is not limited to the above-described embodiments, and various changes and modifications of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.

Claims

1. An air inlet and exhaust control system of a motorcycle is characterized in that: comprises an air inlet mechanism, an engine and an exhaust mechanism which are connected in sequence; the air inlet mechanism comprises an air filter, the air filter comprises a shell, a cover body, a partition plate and a filter element, the cover body and the shell are detachably buckled and combined in the shell to form a closed inner cavity, the partition plate divides the closed inner cavity into a pre-filter cavity and a post-filter cavity, a boss is formed on the partition plate, a through groove for communicating the pre-filter cavity with the post-filter cavity is formed in the surface of the boss, the filter element is installed on the surface of the boss and covers a notch of the through groove, the partition plate inclines towards the rear of the motorcycle and forms an included angle alpha with a vertical surface where a motorcycle center line is located, the filter element inclines towards the rear of the motorcycle and forms an included angle beta with the partition plate, and the filter element inclines towards the rear of the motorcycle and forms a sum of alpha and beta with the vertical surface where the motorcycle center line is located;

the exhaust mechanism comprises a first exhaust pipe and a conversion exhaust assembly, the conversion exhaust assembly is connected with the engine through the first exhaust pipe, and the length of the first exhaust pipe is 250-480 mm;

the filter core inclines towards the ground, and an included angle theta is formed between the filter core and the partition plate.

2. A motorcycle air intake and exhaust control system as set forth in claim 1, wherein: the angle range of the included angle alpha is 0-20 degrees.

3. A motorcycle air intake and exhaust control system as set forth in claim 1, wherein: the cover body and the circumferential edge of the shell are provided with grooves, the circumferential edge of the partition plate is provided with flanges protruding out of the surfaces of the two sides of the partition plate, the flanges are embedded into the grooves of the shell and the cover body on the two sides, and sealing strips are filled at the embedded positions of the flanges and the grooves.

4. A motorcycle intake and exhaust control system as set forth in claim 1, wherein: the circumference outer wall of casing is provided with the baffle, the baffle covers the lock gap of casing and lid.

5. A motorcycle air intake and exhaust control system as set forth in claim 1, wherein: the conversion and discharge assembly is formed by sequentially connecting a first catalytic converter, a second exhaust pipe, a second catalytic converter and a silencing barrel; the first catalytic converter is connected to a first exhaust pipe.

6. A motorcycle air intake and exhaust control system as set forth in claim 5, wherein: three silencing chambers are arranged inside the silencing barrel, and the three silencing chambers are communicated in pairs.

7. A motorcycle air intake and exhaust control system as set forth in claim 5, wherein: and an anti-scalding shield is arranged at the periphery of the first catalytic converter.

8. A motorcycle air intake and exhaust control system as set forth in claim 5, wherein: at least one catalytic conversion unit is arranged inside each of the first catalytic converter and the second catalytic converter.

9. A motorcycle comprising a frame and an air intake and exhaust control system for a motorcycle as claimed in any one of claims 1 to 8, wherein: the frame comprises a triangular area formed by enclosing a main pipe, a side pipe and an upper pipe, and the air filter is arranged in the triangular area; the shell of the air filter is fixed in the triangular area, and the cover body of the air filter is buckled with the shell from the side of the frame.