JPH02128979A - Air cleaner device of irregular ground running vehicle - Google Patents

Abstract

PURPOSE:To avoid the filtrating function from premature impairing by accommodating an element in a cap fitted to the oversurface opening of a case body in such a condition as afloat from the bottom of the case body, and preventing the element from immersion in the water stagnating at the bottom of the case. CONSTITUTION:An air cleaner 23 according to the present invention includes a case body 25 in the form of an oversurface-opened square box situated below the front of a seat 16, a case cap 26 to block the oversurface opening of this case body 25, and a cleaner case 24 divided up and down into two divisions. The case body 25 is formed by stretching ahead the front end of the coupling wall 15 of a rear fender 14, and by providing his extended part 15a with a downward dint. The case cap 26 has an upward protruding swollen part 30 in the middle of the oversurface, and an element holder 32 is mounted at the bottom of a columnar support 31 protruding downward in the middle of the oversurface of this swollen part 30, and an approx. cylindrical element 40 is fitted on this holder 32.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to vehicles such as four-wheeled motor vehicles that travel on uneven terrain such as wetlands and sandy areas, and particularly relates to the structure of the air cleaner device. Regarding.

C. Prior Art] This type of vehicle for running on rough terrain often runs with water splashing or dust kicking up, so an air cleaner is installed below the seat to prevent water and dust from entering the intake system. It is equipped with

Conventionally, as this air cleaner, a concave part is formed in the rear fender that covers the left and right rear wheels from above, and the top opening of this concave part is closed by a lid body having an outside air intake port, and the bottom face of the concave part is closed. Types with attached elements are known.

[Problem to be solved by the invention] However, when the element is attached to the bottom of the recess, the bottom of the recess is also a place where moisture, dust, etc. that flowed in from the suction port with the air accumulate, so there is no need for the element to be overloaded. Dust and moisture can easily adhere to the surface. For this reason, if the element is not cleaned frequently, there is a risk that the element will become dirty and clogged in the early stages, resulting in negative effects on engine performance such as insufficient intake air volume and increased intake resistance. There is a problem that causes

The present invention was made based on these circumstances, and
To provide an air cleaner device for an all-terrain vehicle, which can prevent early soiling of an element, facilitate the installation and removal of the element, and install an air cleaner case at a low position.

[Means for Solving the Problems] Therefore, in the present invention, the air cleaner case that houses the element is composed of a case body with an open top surface and a case cap that removably closes the top opening of the case body. The element that divides the inside of the air cleaner case into two chambers, an inflow chamber and an outflow chamber for outside air, is attached to the case cap side, and the element is inserted into the air cleaner case with this element floating above the bottom of the case body. In addition to housing, the above case cap has
It is characterized by providing an outlet that communicates the outflow chamber with the intake passage.

[Function] According to this configuration, the element is housed in the air cleaner case in a state that it is raised from the bottom surface of the case body, so that dust, moisture, etc. that have flowed into the air cleaner case together with the outside air are absorbed into the bottom surface of the air cleaner case. Even if the element remains, the element will not be immersed in this dust or moisture, and early staining of the element can be prevented.

Further, since the element is attached to the case cap side, when the case cap is removed, the element can also be taken out from the case body as a whole, making it easy to attach and detach the element.

Moreover, since the intake air outlet exists on the case cap side, the case body can be placed at a lower position than the intake passage, and even if the intake passage is tilted downward toward the engine, the air cleaner The overall position of the case can be kept low. Therefore, the seat height can be lowered or the thickness of the cushion material can be increased to improve ride comfort.

[Embodiment] An embodiment of the present invention will be described below based on drawings in which the present invention is applied to a four-wheeled motor vehicle.

The frame indicated by the reference numeral 1 in FIG. 5 includes left and right top rails 3 that support the fuel tank 2.

The upper rails 3 are parallel to each other and extend in the front-rear direction, and both front and rear ends thereof are bent downward and connected by left and right lower rails 4, respectively. Left and right front wheels 5 are arranged on both sides of the front portion of the frame I, and these front wheels 5 are steered by a steering shaft B and a bar handle 7. The upper part of the front wheel 5 is covered by left and right front fenders 8. A side panel portion 8a that covers the fuel tank 2 from the left and right sides is integrally formed at the rear of the front fender 8, and this side panel portion 8a smoothly connects to a tank cover 9 that covers the fuel tank 2 from above. .

Further, a rear arm 10 extending rearward is swingably supported at the rear end connecting portion of the upper rail 3 and the lower rail 4. A hub 11 provided at the rear end of this rear arm 10
An axle 12 is rotatably supported on the axle 12, and left and right rear wheels 13 are attached to both ends of the axle 12.

The rear wheels 13 are covered from the upper side to the front side by a synthetic resin glue ender 14. The rear fender 14 is integrally connected between the left and right rear wheels 13 by a connecting wall 15, and the seat 1 is mounted on the connecting wall 15.
B is installed. The front end of the seat 16 is the fuel tank 2
The front end of the seat bottom plate lea faces the rear surface of the fuel tank 2, as shown in FIG.

Incidentally, an engine 17 is mounted on the frame l, located between the front wheels 5 and the rear wheels 13.

A carburetor 22 is connected to the cylinder 19 of the engine 17 via an intake pipe 21, and the intake passage constituted by the intake pipe 21 and the carburetor 22 allows liquid fuel to flow through the inner surface of the intake passage. It is inclined downward toward the cylinder 19 so that it can easily flow toward the cylinder 19. An air cleaner 23 according to the present invention is connected to the upstream end of this intake passage.

Details of this air cleaner 23 are shown in Figures 1 and 2.
To explain this with reference to the drawings, reference numeral 24 in the drawings indicates an air cleaner case, which is located below the front of the seat te.

The air cleaner case 24 is vertically divided into two parts: a rectangular box-shaped case body 25 with an open top, and a case cap 26 that closes the top opening of the case body 25. It is removably attached to the body via a screw 27. In the case of this embodiment, the case body 25 is constructed by extending the front end of the connecting wall 15 of the rear fender 14 forward and recessing the extended portion 15a downward, and is integrated with the rear fender 14. There is.

A bulge 30 that protrudes upward is formed at the center of the upper surface of the case cap 2B. A columnar support portion 31 protruding toward the case body 25 is provided at the center of the upper surface of the bulge portion 30, and an element holder 32 is attached to the lower end of this support portion 31. The element holder 32 has a boss portion 33 fitted to the lower end surface of the support portion 31.
A plurality of arm parts 34 extend radially from the outer periphery of the boss part 33 toward the case cap 26 side, and these arm parts 3
4, and a ring part 35 that connects the upper ends of the bulging part 30, and this ring part 35 covers the lower end opening 30a of the bulging part 30 from the outside. An insertion hole 37 into which a screw 36 is inserted is opened on the lower surface of the boss portion 33 and the support portion 31, and a nut 38 is embedded inside the support portion 31 at the end of the insertion hole 37. There is. Therefore, the element 32 is removably attached to the support part 31 in a suspended state by screwing the screw 36 inserted into the insertion hole 37 into the nut 38.

Further, an element 40 is attached to the outer periphery of the element holder 32. The element 4o is formed into a substantially cylindrical shape with an open top surface made of, for example, a sponge.
Its upper end opening is hooked onto the ring portion 35 and is sandwiched between the ring portion 35 and the lower end opening Boa of the bulging portion 3o. Therefore, the element 40 is supported on the case cap 26 side, and the inside of the air cleaner case 24 is connected to the inlet chamber 41 on the case body 25 side and the case cap 26 side.
The element 4o is vertically partitioned into two chambers, including a side outflow chamber 42, and as shown in FIG.

An inlet 43 for outside air connected to the inflow chamber 41 is formed on the upper surface of the front end of the case cap 26, and an intake duct 44 extending upward is connected to this inlet 43. As shown in FIGS. 3 and 4, the upper end of the intake duct 44 is guided into a space 45 between the fuel tank 2 and the seat 1B. In this case, the rear surface of the fuel tank 2 facing the space portion 45 is provided with four parts 4B extending in the vertical direction, and the upper end part of the intake duct 44 enters into this four part 46. The upper end of the intake duct 4.4 is in contact with the inner surface of the fourth part 4B, and is positioned in the space 45.
An intake port 47 that opens at 5 is provided in a protruding manner. Intake port 47
is formed with a diameter smaller than that of the intake duct 44,
The space portion 45 opens into the space portion 45 without being deflected by surrounding parts such as the recess 4B of the fuel tank 2 or the seat bottom plate tea. Therefore, even if water such as rainwater flows along the outer surface of the fuel tank 2 and flows into the space portion 45, the water will not enter the air intake port 47 and water will not enter the air cleaner 23.

In the case of this embodiment, a flange portion 47a projecting radially inward is formed at the opening periphery of the intake port 47, as shown in FIG. This flange portion 47a is for adjusting pressure waves caused by pulsation of intake air generated in the intake duct 44, and contributes to improving the output of the engine 17.

Furthermore, an intake air outlet 48 connected to the outflow chamber 42 is opened at the front surface of the bulging portion 30 of the case cap 2B, and this outlet 48 is connected to the intake passage of the carburetor 22 via a joint 49. .

In addition, the bottom of the case body 25 has an outlet 5 for draining water.
0 is provided protrudingly.

According to such a configuration, the air cleaner case 24 that accommodates the element 40 is vertically divided into a case body 25 with an open top surface and a case cap 2B that closes the top opening of the case body 25. Since the element 40 is attached to the upper surface of the case cap 2B and the element 40 is lifted from the bottom surface 25a of the case body 25, dust, moisture, etc. that flowed in from the air intake port 47 together with the outside air remain on the bottom surface 25a of the case body 25. Even if the element 40 is exposed to dust or moisture, the element 40 is not immersed in the dust or moisture.

Therefore, it is possible to prevent the filtration function of the element 40 from being damaged early or from being significantly contaminated, and it is possible to maintain a good flow of intake air and to suppress the intake resistance to a minimum.

Further, since the element 40 is provided on the case cap 26 side, when the screw 27 is loosened and the case cap 26 is removed from the case body 25, the element 40 can also be taken out at the same time. Therefore, when replacing the element 40, there is no need to insert one's hand into a narrow space below the seat 1B, and the work of attaching and detaching the element 40 can be performed with ease.

Moreover, since the outlet 48 connected to the intake passage is opened on the side of the case cap 2B, the case body 25 can be connected to the carburetor 2.
2 and the intake pipe 21. For this reason, this intake passage is connected to the cylinder 19 so that the liquid fuel traveling along the inner surface of the intake passage easily flows to the cylinder 19 side.
Even if you tilt it downward as you move toward the 9 side, the cylinder 19
The position of the air cleaner case 24 can be lowered relative to the air cleaner case 24.

Therefore, the height of the seat 1B located on the air cleaner case 24 can be reduced or the thickness of the cushion material of the seat 1B can be increased to improve riding comfort.

Further, in this embodiment, since the intake air inlet 43 is also provided on the case cap 2B side, the intake duct 44 extending upward from this population 43 can be easily routed, and the intake duct 44 itself does not bend. It is possible to reduce the inhalation resistance by reducing the number and shortening the overall length.

In the above embodiment, the case body is integrated with the rear fender, but depending on the case, the air cleaner and the rear fender may be separate bodies.

[Effects of the Invention] According to the present invention described in detail above, the element does not need to be immersed in dust or moisture accumulated at the bottom of the air cleaner case.
Significant contamination can be prevented, the flow of intake air can be maintained well, and intake resistance can be kept to a minimum. Further, when the case cap is removed, the element can also be removed at the same time, making it easy to attach and detach the element.

Moreover, since the intake air outlet is opened on the case cap side, the case body can be installed at a lower position than the intake passage, and the liquid fuel traveling along the inner surface of the intake passage can easily flow to the engine side. Even if this intake passage is inclined downward toward the engine, the position of the air cleaner case relative to the engine can be kept low.

Therefore, the height of the seat located on the air cleaner case can be reduced or the thickness of the cushion material of this seat can be increased accordingly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a sectional view of the air cleaner and its surroundings, Fig. 2 is a plan view of the air cleaner, Fig. 3 is a partially sectional side view of the opening of the intake duct, and Fig. 4. 5 is a side view of the four-wheeled motor vehicle, and FIG. 6 is a plan view of the four-wheeled motor vehicle. 1B... Seat, 17... Engine, 24... Air cleaner case, 25... Case body, 25a...
・Bottom, 26...Case cap, 40...Element, 41...Inflow chamber, 42...Outflow chamber, 48...
·Exit. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Scope of Claims] An all-terrain vehicle in which an air cleaner case housing an element is provided below the seat, and the air cleaner case is connected to the upstream end of an intake passage of an engine, wherein the air cleaner case has an open top surface. The case body is divided into a case body and a case cap that removably closes the upper opening of the case body, and an element is provided on the case cap side to divide the interior of the air cleaner case into two chambers, an inflow chamber and an outflow chamber for outside air. and the element is housed in the air cleaner case in a state floating from the bottom of the case body, and the case cap is provided with an outlet for communicating the outflow chamber and the intake passage. Air cleaner device for running vehicles.