WO2021199069A1

WO2021199069A1 - Air cleaner assembly

Info

Publication number: WO2021199069A1
Application number: PCT/IN2021/050284
Authority: WO
Inventors: Jayajothi Johnson Vethanayagam; Selvaraj Kalappan; Murugesan Manickam; Vaidheeswaran Ramesh; Harsha KOTHURU NARAYANA; Mani Boobalan
Original assignee: TVS Motor Co Ltd
Current assignee: TVS Motor Co Ltd
Priority date: 2020-03-31
Filing date: 2021-03-19
Publication date: 2021-10-07
Anticipated expiration: 2022-09-30
Also published as: CN115349051A

Abstract

The present invention relates to a two wheeled step through type vehicle (100), where said vehicle (100) comprises of a mono tube type frame (101), engine (125), cylinder head (123), cylinder (124), fuel tank (103), air cleaner assembly (301). The air cleaner assembly is mounted on a main tube (101b) of the mono-tube type frame (101) and super imposed by the fuel tank (103). Further, the air cleaner assembly (301) includes two portion, primary compartment (407) which contains the primary cleaner element (406) and secondary compartment (401) which includes the secondary cleaner element (403), thereby, ensures the reduction of number of components and hoses.

Description

AIR CLEANER ASSEMBLY

TECHNICAL FIELD

[0001] The present subject matter relates to a two wheeled type vehicle. More particularly, the present subject matter relates to the air cleaner assembly of the step through type vehicles.

BACKGROUND

[0002] Step through type saddle vehicles are basically one of the most affordable and popular kind of the vehicle among the world’s population. These kinds of vehicles are mostly powered by the two stroke or four stroke engines. Conventionally carburetor type system has been implemented in vehicles for supplying & metering fuel quantity to the engine powering such vehicles. With need to enhance performance, power output & efficiency of same engine as well as reduce emissions, fuel injection system has become popular in step through type vehicles. Thus, a fuel management system is implemented in vehicles to control the fuel being supplied to the engine at right time & in right quantity.

[0003] Often with vehicles being commercialized for use in multiple markets & variety of users, depending on the market needs, vehicle manufacturers face a challenge of handling variety of fuel supply system for given vehicle with variant of carburetor system vis-a-vis fuel injection system. The fuel management system of the internal combustion engine has to use the combination of fuel tank along with the fuel pump module to deliver fuel in the engine with the help of the fuel injector. The vehicle fuel system is responsible for delivering the right amount of fuel from a fuel tank to the fuel injector, to maintain an appropriate amount of fuel in the engine for the process of internal combustion.

[0004] With ever increasing number of vehicles used for personal transport and its contribution to the pollution of environment in terms of the emission, evaporative emissions also add to the pollution in terms of unburnt and burnt hydrocarbons. By very basic physical properties of gasoline fuels primarily used for transportation, evaporative emissions are bound to exist under normal environment conditions and temperatures ranging from ambient temperatures to temperature encountered during various operating conditions. The gasoline fuel has propensity to vaporize at room temperatures within respective container and this emission needs to be purged to avoid undue pressure development in the container. Such emissions are often referred to as evaporative emissions. There is a constant drive from manufacturers to bring down the extent of emissions in the automotive sector.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The detailed description is described with reference to an embodiment in a saddle type step thru vehicle along with the accompanying figures. The same numbers are used throughout the drawings to reference like features and components.

[0006] Fig.l is a side view of a step through type vehicle as per one embodiment of the present invention.

[0007] Fig.2 is a perspective view of a frame of step through type vehicle as per one embodiment of the present invention.

[0008] Fig.3 is a side view of the step through type vehicle with air cleaner assembly as per one embodiment of the present invention.

[0009] Fig. 3a is an assembled view of the air cleaner assembly and fuel tank as per one embodiment of the present invention.

[00010] Fig. 4 is an exploded view of the air cleaner assembly as per one embodiment of the present invention.

[00011] Fig. 4a is a sectional view of the secondary compartment as per one embodiment of the present invention.

DETAILED DESCRIPTION

[00012] The conventional carburetor fuel systems lack in several major aspects e.g. poor efficiency in terms of fuel consumption and performance of the engine. Also, it is majorly responsible for the emission of harmful gases which are the main cause for polluting the environment.

[00013] In order to address the shortcomings of the conventional carburetor system, an Electronic Fuel Injection System or EFI was developed as an improvement over the carburetor in order to calibrate and optimize the fuel/air ratio. The electronic fuel injection system or EFI is utilized to better control fuel to air ratios in order to provide better performance, improve emissions and drivability. Moreover, the need of precise fuel supply creates a necessity for introduction of Electronic Fuel Injection (EFI) system in existing carburetor vehicles.

[00014] Generally, the typical electronic fuel injection system comprises a fuel tank, a fuel pump that is operatively coupled to the fuel tank that directs fuel into the engine. Further, as an improvement over the carburetor, the Electronic Fuel Injection system (EFI) utilizes advanced electronic techniques to adjust the air fuel mixture to reduce the evaporative emission in the environment. Hence, as engines shifts from carburetors and towards fuel injection, the conversion of the carburetor to the Electronic Fuel Injection system (EFI) involves different types of electrical and mechanical modifications in the vehicle.

[00015] , Also, in recent times for reducing the evaporative emission in the environment, the evaporative fuel recycle systems are designed to store and dispose off the fuel vapors before they can escape into the atmosphere, A typical system consists of a canister full of charcoal, valves, hoses, vents in the fuel lines and a sealed fuel tank cap. When fuel evaporates inside the fuel tank, the excess vapors are transferred to the canister. They are stored there until they can safely be transferred back to the engine to be burnt with the normal air-fuel mixture.

[00016] Ideally, the fuel system should be completely closed to prevent any vapor escape, but as it is evident form the fact that under extreme conditions like heat and cold which affects the pressure inside the fuel tank and fuel tank head space, there arises a need for venting and vacuum pressure relief functions to limit the positive and negative pressure inside the fuel tank respectively. As fuel is consumed by combustion chamber inside the engine, therefore during introduction of fuel into combustion chamber air is introduced inside the headspace of the fuel tank to limit the magnitude of negative tank pressure. Generally such venting and vacuum relief functions performed through valves.

[00017] The step through type vehicles typically have a canister as a component of evaporative fuel recycle system which adsorbs the hydrocarbon vapors from the fuel tank and supplies evaporated fuel to an engine for combustion which is positioned near to engine [00018] The step through type vehicles have an evaporative fuel recycle system comprises canister, roll over valve, purge valve and other connecting elements to connect from engine to fuel tank. Here, canister is a small round or rectangular plastic or steel container mounted somewhere in the vehicle. It is usually hidden from view and may be located in a corner of the engine compartment or inside a side panels. The canister is filled of activated charcoal. The charcoal acts like a sponge and adsorbs and stores fuel vapors. The vapors are stored in the canister until the engine is started, is warm and is being driven. The purge control valve when open , it allows intake vacuum to siphon the fuel vapors into the engine. The canister is connected to the fuel tank via the hoses. Hence, escape of the fuel vapors is avoided, however venting of tank is still required.

[00019] Further, under normal circumstances, the evaporative fuel recycle system having canister causes few problems. The most common problem with the evaporative fuel recycles system having canister is a faulty purge control, increased hose length, pinching of hose pipe, inaccurate orientation of roll over valve, water entry etc.

[00020] Typically, manufacturers look for implementing a canister system to address these emissions to the extent feasible. Bigger the size of the canister, the higher the emissions can be adsorbed. Such canister solutions bring with them additional components like hoses, valves etc. which need to be packaged in the same vehicle without compromising on the size of the vehicle as well as minimize cost impact. Therefore, there exists a continuous challenge for automotive manufacturers to address the evaporative emissions as well as avoid discharge of the same into the atmosphere within minimum space / size of the vehicle as well as at a reduced cost and weight impact. Further, the challenge is particularly significant for a step through vehicle where impact on compactness, weight & cost become critical.

[00021] For the vehicle having compact layout, the disposition of the canister on the side frame is complex and difficult due to lack of space, also the serviceability and accessibility of the canister gets restricted since one has to remove multiple components for servicing which adversely increase the servicing time. Further, such disposition results in change in design or change in location of neighboring parts in the compact layout, thereby increasing cost, lead time for change over as well as more variety in parts. [00022] Further, in known art, canister is installed to the frame with rubber cushion, hence it requires an attaching member & additional assembly process which may be troublesome during installation within the limited space & complex fuel piping. Further, the canister assembly is installed with the air cleaner as an integrated part of the air cleaner where it requires attaching member which leads to increased assembly time, space constraints etc.

[00023] Hence, there exists a challenge of designing an efficient evaporative fuel recycle system, which can satisfactorily accommodate all essential elements to ensure less emission rate in step through type vehicles without any major change in design and manufacturing set-up of the vehicle.

[00024] Therefore, there is a need to have an improved mounting of the air cleaner assembly having primary and secondary air cleaner element which overcomes all of the above problems and other problems of known art.

[00025] The present invention provides a solution to the above problems while meeting the requirements of minimum modifications in vehicle from carburetor system to fuel injection system, at low cost with ease of manufacturing etc.

[00026] With the above objectives in view, the present invention relates to the electronically controlled fuel injection system and more particularly to the improved mounting of air cleaner assembly where the air cleaner assembly is having two parts namely, primary compartment and secondary compartment having secondary air cleaner element.

[00027] As per one aspect of the present invention, the frame of the step through type vehicle comprises of the main tube, down tube etc., where the horizontal portion of the main frame is provided with an engine mounting bracket where the engine is mounted to the frame through the engine mounting bracket, ensuring rigid mounting of the engine below the horizontally extending downward portion of main frame, cylinder head is disposed in front of the crankcase and the secondary air injection valve and secondary air injection cleaner are disposed on the left hand side of the frame tube. Further, the fuel tank is disposed at a slightly tilted position on the main tube and the air cleaner assembly is disposed on the main tube and super imposed by the fuel tank. [00028] Further, as per one aspect of the present invention, the hose has two ends where one end is connected to the fuel tank and the another end of hose is connected to the roll over valve where the hose is rigidly attached by the hose clip, to ensure the channelizing of the hose to the roll over valve and avoid any breakage of the hoses. Further, as per one aspect of the present invention, another end of roll over valve has a hose which is further connected to the air cleaner assembly.

[00029] Further, as per one aspect of the present invention, the air cleaner assembly is divided into two portions namely primary compartment and secondary compartment, where the primary compartment equipped with clean mixture of fuel vapor and atmospheric air, channelized through the secondary compartment and finally channelized to an engine at intake stage. The profile of the primary compartment conforms with a profile of the secondary compartment to make air cleaner assembly a close structure. Further, as per one aspect of the present invention, the secondary compartment is divided into two sub parts, part A and part B, where the first part A consists of a partially enclosed wall into which secondary cleaner element like foam, wet foam, charcoal, carbon, charred wood etc, to adsorb the fuel vapor, is securely placed, which ensures the ease of accessibility of the cleaner element The fuel vapor is channelized from the outlet of the fuel tank to the first part A of secondary compartment, through the hoses connected to the outlet fuel tank and roll over valve. Further, the channelized fuel vapor is mixed with the atmospheric air present in the secondary compartment and the mixture is channelized to the engine at the intake stage of the engine. Further, the mixture of fuel vapor and atmospheric air ensures proper combustion in the engine, which ensures that the fuel vapors are not getting released in the atmosphere and also, ensures the reduction in the number of hoses without affecting the working of the air cleaner assembly and the engine. Furthermore, partially enclosed wall present in the Part A of secondary compartment is closed by a partition wall, which ensures that the secondary cleaner element is securely placed inside the partially enclosed wall, hence ensures the efficiency of the cleaner element present inside the secondary compartment. The partition wall also includes a cleaner member, for example, filter paper, which restricts dust, mud, or external component from going into the engine at the intake stage. [00030] Further, as per one aspect of the present invention, the second part B of the secondary compartment has an air inlet to channelise the atmospheric air into the air cleaner. Further, the profile of the secondary compartment conforms with the profile of partition wall which includes the cleaner member, for example filter paper, to ensure the restriction of dust, mud or any external components from going into the engine. Further, as per one aspect of the present invention, the atmospheric air and the fuel vapor inside the air cleaner is channelized to the engine through the suction port when the engine is in intake stage.

[00031] In the ensuing exemplary aspects, the vehicle is a step through vehicle. However, it is contemplated that the concepts of the present invention may be applied to any of the two wheeled vehicles and three wheeled vehicles without defeating the spirit of the invention.

[00032] Various other features of the invention are described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements. The drawing in which an element first appears is indicated by the leftmost digit(s) in the corresponding reference number. With reference to the accompanying drawings, wherein the same reference numerals will be used to identify the same or similar elements throughout the several views.

[00033] Further “front” and “rear”, and “left” and “right” referred to in the ensuring description of the illustrated embodiment refer to front and rear, and left and right directions as seen in a state of being seated on a seat of the saddle type vehicle. Furthermore, a longitudinal axis refers to a front to rear axis relative to the vehicle, while a lateral axis refers to a side to side, or left to right axis relative to the vehicle. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Further, the present subject matter can also be used in any two- wheeler, but for reference, the present subject matter is explained with respect to the step through type vehicle.

[00034] Fig. 1 is the left side view of an exemplary step through type vehicle, in accordance with an embodiment of present subject matter. The vehicle (100) has a mono- tube type frame (101), which acts as the skeleton for bearing the loads and is also referred to as backbone frame as (shown in Fig 2). Instrument cluster (119) is mounted on handle bar assembly (126). The handle bar assembly (126) is pivotally disposed through the head tube where it includes brake levers (113). The handle bar assembly (126) is connected to a front wheel (129) by one or more front suspension(s) (130). A front fender (131) is disposed above the front wheel (129) for covering at least a portion of the front wheel (129). A leg shield (112) is provided on said vehicle (100). A fuel tank (103) having fuel cap (114) is mounted to the main tube (101b) (as shown in Fig. 2) of the mono-tube type frame (101) and it is disposed in the front portion F of a step-through space of the mono tube type frame (101). The vehicle (100) having lighting means which includes Head lamp (127), Tail lamp (106), Turning indicators includes front side indicators (111) and rear side indicator (102) respectively and daytime running lamp (104). The engine (125) is mounted to the lower portion of said mono-tube type frame (101). In an embodiment, the engine (125) is an IC engine. The fuel tank (103) is functionally connected to the engine (125).

[00035] In an embodiment, cylinder axis (C-C’) inclined to a front of said vehicle (100). A swing arm (134) is swingably connected to the mono-tube type frame (101). A rear wheel (133) is rotatably supported by the swing arm (134). One or more rear suspension(s) (135) connect the swing arm (134) at an angle, to sustain both the radial and axial forces occurring due to wheel reaction, to the mono-tube type frame (101). A license plate (105) and reflector (116) mounted on a rear fender (128) is disposed above the rear wheel (133). A seat assembly (132a, 132b) is disposed at a rear portion (R) of the step-through space. In an embodiment, the seat assembly (132) includes a rider seat (132a), and a pillion seat (132b). The vehicle (100) is provided with the grab rail (109). Further, the seat assembly (132a, 132b) is positioned above the rear wheel (133).The vehicle is supported by a center stand (120) mounted to the frame assembly. A tool box (110) is provided on the left side of said vehicle (100). A cover member (118) is mounted on down tube (101c) (as shown in Fig. 2). The body side cover member (118) covers at least a portion of the engine (125) & down tube (101c).

[00036] The engine (125) includes an air intake system (not shown), an exhaust system (not shown), and a starter system (not shown). The starter system includes an electric starter mechanism or a mechanical starter mechanism. The electrical starter system is powered by an auxiliary power source, for cranking the engine. Power generated by engine is transferred to the rear wheel (133) through a transmission system (not shown).

[00037] The engine (125) comprises a cylinder head (123), a cylinder (124), a crankcase ( not shown) and a chain cover (121) in order from the front to the rear direction of an engine assembly (122). The cylinder (124) protrudes in a forward direction from the front end portion of the crankcase (503).

[00038] Fig. 2 is a perspective view of the frame which is generally of a convex shape, where main tube (101b) extending rearwardly and downwardly from a head tube (101a) of the mono-tube type frame (101), further a down tube (101c) of the mono-tube type frame (101) extends rearward, along a longitudinal axis (L-L’) of the vehicle (100) from a rear portion of the main tube (101b). The fuel tank (103) (as shown in Fig. 1) is attached on the main tube (101b) through attaching means which includes at least one or more mounting brackets (203).

[00039] The engine (125) (as shown in Fig. 1) is a four-stroke air-cooled engine where the center portion of the engine is supported to the mono-tube type frame (101). The cover member (118), a floorboard is disposed above the down tube (101c) using attaching means. The attaching means includes two cover frame mounting brackets (201) attached to the down tube (101c) of the mono-tube type frame (101) to support the cover member (118), floorboard. Both the brackets (201) are placed parallel when viewed from top of said vehicle (100).

[00040] Further, the main tube (101b) includes an engine mounting bracket (202) and a pair of cover frame mounting bracket (201) in the vehicle width direction, where the engine is mounted horizontally below the down tube (101c).

[00041] Fig. 3 is the side view of the step through type vehicle with the air cleaner assembly as per one embodiment of the present invention. As per one embodiment of the present invention, the air cleaner assembly (301) is attached to the main tube (101b) with the different attachment means like one or more mounting brackets etc., and super imposed with respect to the fuel tank (103), when the step through vehicle is viewed from the rider’s side. Further, as per one embodiment of the present invention, the roll over valve having two ends, is accommodated in the bottom portion of the fuel tank (103), where one end is attached to the fuel tank (103) and another end is attached to the air cleaner assembly (301) through one or more hoses. Further, as per one embodiment of the present invention, the hose (309) has two ends (as shown in fig. 3a), where one end (304) is connected to the outlet (303) of the fuel tank (103) and another end (306) is connected to the roll over valve (302). Further, through the hose (309), the fuel vapor generated in the fuel tank (103) is channelized to the roll over valve (302), from where the roll over valve (302) allows the fuel vapor to vent into the air cleaner assembly (301) through the hose (310), ensuring reduction of number of hoses and also, reduction of components for channelizing the fuel vapor and reaching the engine for combustion process.

[00042] Fig. 4 is an exploded view of the air cleaner assembly as per one embodiment of the present invention. Further, as per one embodiment of the present invention, the air cleaner assembly (301) includes two parts namely primary compartment (407) and secondary compartment (401). As per one embodiment of the present invention, the secondary compartment (401) is further divided into two sub parts namely part A and part B (as shown in fig. 4a), where part A includes the secondary cleaner element (403) like foam, wet foam, charcoal, carbon, charred wood, to adsorb the fuel vapor which is channelized from the roll over valve (302) to the air cleaner assembly (301) through the hose (310). Further, the mixture of fuel vapor and air ensures the proper combustion in the engine, ensuring that the fuel vapors are not getting released in the atmosphere and also, ensures the reduction in the number of hoses without affecting the working of the air cleaner assembly and the engine. Further, the part A of the secondary compartment has a partially enclosed wall (402) of substantially triangular shape to accommodate the secondary cleaner element (403), which ensures the reduced assembly time to assemble the secondary cleaner element and also ensures ease of accessibility of the cleaner element..

[00043] Further, as per one embodiment of the present invention, the part B of the secondary compartment (401) has an air inlet (404) to channelise the atmospheric air into the air cleaner assembly (301). Further, the profile of the secondary compartment (401) is complimentary with the profile of partition wall (410) which includes the cleaner element (406), for example filter paper, to ensure the restriction of dust, mud or any external components from going into the engine. Further, as per one embodiment of the present invention, the atmospheric air and the fuel vapor inside the air cleaner is channelized to the engine through the suction port (409) when the engine is in intake stage, ensuring proper combustion in engine. Further, as per one embodiment of the present invention, the partially enclosed wall (402) present in Part A of the secondary element (401) is closed with a partition wall (410), ensures that the cleaner element (406) inside the partially enclosed wall (402) is securely placed, hence maintains the efficiency of the cleaner element and also, ensures ease of accessibility . As per one embodiment of the present invention, the partition wall (410) also includes a cleaner member (406), for example, filter paper, which restricts dust, mud, or external component from going into the engine at the intake stage.

[00044] Further, as per one embodiment of the present invention, the secondary compartment (401) of the air cleaner assembly (301) is covered by a primary compartment (407) with the different attachment means, for example: one or more fasteners (408), ensures the ease of assembly and serviceability of the air cleaner assembly.

[00045] The invention helps in overcoming the problem of space constraints, minimizing the use of components, increasing the ease of accessibility and serviceability of the air cleaner assembly of the vehicle while maintaining the overall weight and width of the vehicle and ultimately makes it cost effective.

[00046] Advantageously, the embodiments of the present invention, describes the potential modifications in the air cleaner assembly, where the air cleaner assembly includes two parts, primary cleaner element and secondary cleaner element, where the secondary cleaner element includes the secondary cleaner element.

[00047] Many other improvements and modifications may be incorporated herein without deviating from the scope of the invention. List of reference symbol:

Fig. 1:

100: Step Through Type Vehicle. 126: Handle Bar Assembly 119: Instrument Cluster

127: Head Lamp 111: Front Side Indicator 104: Daytime Running Lamp 112: A leg Shield 131 : A front Fender

129: Front Wheel 130: Front Suspension 113: Brake Lever 103: Fuel Tank 114: Fuel cap

118: Cover Member 123: Cylinder Head 124: Cylinder 122: Engine Assembly 125: Engine

132 (132a, 132b): Seat Assembly 101 : Mono-tube frame 109: Grab Rail

106: Tail Lamp 105 : License Plate

102: Rear Side Indicator 128: Rear Fender 116: Reflector 135: Rear Suspension

133: Rear Wheel 134: Swing Arm 121: Chain Cover 120: Center Stand 110: Tool Box

C-C’: Cylinder Axis Fig. 2:

101 : Mono Tube Type Frame 101a: Head Tube 101b: Main Tube

101c: Down tube 101 d: Rear Tube

201 : Pair of cover frame mounting bracket 202: Engine Mounting Bracket 203: Front Bracket

Fig. 3

301 : Air Cleaner Assembly 302: Roll Over Valve.

Fig. 3a 304: One part of hose 303: Outlet of Fuel Tank.

309: Hose 305: Hose Clamp 306: Another part of hose.

307: One end of hose.

308: Another end of hose 310: Hose Fig. 4: 401 : Secondary Compartment in Air Cleaner Assembly.

402: Partially Enclosed Wall.

403: Secondary Cleaner Element 404: Air Intake.

406: filter element. 407: Covering Member

408: One or more fasteners 409: Suction port 410: Partition Wall.

Fig. 4a Part A: First part in secondary compartment.

Part B: Second part in secondary compartment.

Claims

We Claim;

1. A two wheeled type vehicle (100), said vehicle (100) comprising: a frame (101) providing skeletal support to said vehicle (100) ; said frame (101) includes a head tube (101a), a main tube (101b), a down tube (101c); a fuel tank (103) is mounted on said main tube (101b); said fuel tank (103) has outlet (303), said outlet (303) is connected to an air cleaner assembly (301); and said air cleaner assembly (301) includes two parts, a primary compartment (407) and a secondary compartment (401), where said secondary compartment (401) includes a secondary cleaner element (403), where said primary compartment (407) and said secondary compartment is divided by a partition wall (410).

2. An air cleaner assembly (301)for a two wheeled type vehicle (100), said air cleaner assembly (301) comprising; a primary compartment (407); a secondary compartment (401); and said secondary compartment (401) includes two parts, Part A and Part B where said Part A of said secondary compartment (401) includes partially enclosed wall (402) to accommodate said secondary cleaner element (403).

3. The two wheeled type vehicle (100) as claimed in claim 2, wherein said Part B of said secondary compartment (401) has an air inlet chamber (404) to allow access of atmospheric air inside said air cleaner assembly (301).

4. The two wheeled type vehicle (100) as claimed in claim 1 or claim 2, wherein said secondary compartment (401) compliments with a profile of said partition wall (410).

5. The two wheeled type vehicle (100) as claimed in claim 1 or claim 2 wherein said secondary compartment (401) is detachably attached to a primary compartment (407) with one or more attachment means (408).

6. The two wheeled type vehicle (100) as claimed in claim 1 , wherein said outlet (303) of said fuel tank (103) is attached to a hose (309) having two ends (304, 306), where one end (304) of said hose (309) is connected to said outlet (303) of said fuel tank (103) and another end (306) of said hose (309) is connected to a roll over valve (302).

1

7. The two wheeled type vehicle (100) as claimed in claim 6 , wherein said roll over valve (302) is connected to one end (307) of hose (310) and another end (308) of said hose (310) is connected to said air cleaner assembly (301).

2