JPH01136886A - Suction device for scooter type car - Google Patents

Abstract

PURPOSE: To increase the durability of a filter and to reduce noises in an intake system by communicating an air cream inlet for supplying air to an engine with a helmet housing box. CONSTITUTION: A flexible duct 26 is connected to an inlet 25 formed in the side face of an air cleaner case 24, the upstream end of the inlet is connected to the front part of the bottom plate 9a of a rear frame 9, and by placing a garnet 27 on the upper surface, sealing thereof by a helmet 11 or the like is prevented. Accordingly, air sucked by an engine 4 is supplied via a helmet housing box 12, and clean external air separated from atmosphere below a rear body where muddy water or dust taken up by a rear wheel 2 exists in large quantity. Thus, relatively clean air is supplied to the air cleaner case 24, the durability of a filter is greatly increased with little wear, and intake noises are reduced by its volume.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an intake system for a scooter type vehicle for supplying air to an installed engine.

(Prior Art) Scooter-type vehicles range from two-wheeled vehicles to four-wheeled vehicles, and are typified by two-wheeled motorized vehicles simply called scooters.
A step board is placed in a low indentation between the steering wheel and the seat, and the rear body is relatively voluminous below the seat. This rear body is equipped with a storage box that uses the seat as a substitute, but it is often used as a helmet storage box so that the rider does not have to carry around the helmet he wears while riding while parked. Although this helmet storage box is not completely airtight, it is designed to be close to that to prevent rainwater and muddy water from entering.

On the other hand, the engine that drives this scooter type vehicle is of a unit swing type in which the wheels are integrally supported, and is usually suspended under the rear body. An air cleaner that supplies clean air to the engine is also located under the rear body.

However, in this enclosed space under the rear body near the rear wheels, dust and muddy water can easily enter through the inlet. Efforts have been made to reduce the intrusion of water by installing a cover on the outer end of the inlet and creating a 6-maze shape inside the air cleaner case, but it is difficult to prevent water from entering completely, and it may contaminate the filter and shorten its life. This had the problem of lowering efficiency and reducing engine output.

(Problem to be solved by the invention) In conventional scooters, the air cleaner that purifies and supplies air to the engine is placed under the rear body near the rear wheels, and muddy water and dust can enter through the inlet. In view of this problem, the present invention prevents muddy water and dust from entering the air cleaner without providing special devices such as a cover or maze shape. To obtain an air intake device for a scooter type vehicle which is almost completely blocked.

[Structure of the invention]

(Means for Solving the Problems) For the above purpose, the intake device for a scooter type vehicle of the present invention provides an inlet of an air cleaner that supplies air to an engine in a scooter type vehicle equipped with a helmet storage box in which a seat is used as a lid. communicates with the helmet storage box.

(Function) With this configuration, the air cleaner inlet opens and is isolated from the atmosphere under the cabin where muddy water and dust thrown up by the rear wheels exist, and the air in the helmet storage box is sucked into the engine. supply to. The inside of the helmet storage box is essentially sealed to prevent muddy water and dust from entering, so clean air is sucked in, extending the life of the filter.

Ventilation is promoted inside the helmet storage box, and its volume has the effect of reducing intake noise.

(Embodiment) A detailed description will be given below of figures showing a scooter type two-wheeled motor vehicle which is an embodiment of the present invention.

In FIG. 1, the scooter has a front wheel 1 that is steered by a handlebar 3 and a rear wheel 2 that is driven by an engine 4, arranged in the front and rear. A step board 6 is laid down, and the lower part of the seat 5 is covered with a body cover 7.

The frame is constructed with pipes, plates, etc. to the required strength and shape, but in this case, the front frame made of vibrator 8
and a rear frame 9 made of steel plate. That is, the front frame 8 has a shape that is curved from the head pipe 10 along the indented part, the front frame rear end 8a jumps upward rearward and ends, and the rear frame 9 is formed by the front frame 11Ila section. It is welded to 8a and is formed into a box shape with a bottom that expands rearward and upward. The seat 5 is attached to the open upper surface of the rear frame 9 so that it can be opened and opened, and the inside becomes a helmet storage box 12 for storing a helmet 11. At the same time, the outer surface becomes an exterior surface together with the body cover 7 and becomes a part of the rear body. There is.

The engine 4 is generally of a unit swing type, in which the rear wheel 2 is pivotally supported and integrated with the rear part of a swing case 13 extending rearward from one side of the crankcase, and the front part is attached to the rear end part 8a of the front frame. It is pivotally supported and interposed between the rear end portion and the rear frame 9, or is loosely suspended by an A1 cushion unit 14 for 117 m.

Reference numeral 15 denotes a front fork which buffers and suspends the front wheel 1 by a front cushion unit 16. 17 is a leg shield. Further, a fuel tank 19 and an oil tank (not shown) are placed in the body cover 7 on the upper surface of the rear fender 18.

An inlet 19a of the fuel tank 19 and an inlet (not shown) of the oil tank are exposed on the open surface of the body cover 7, and are closed by the seat 5 together with the storage box 12. A sealing rubber 21 is attached to the periphery of the opening 20 on the upper surface of the rear frame 9, and is in close contact with the seat bottom plate 22 to keep the helmet storage box 12 in a substantially sealed state.

Next, the carburetor that supplies fuel to the engine 4 and the air cleaner case 24 connected upstream thereof swing together with the engine 4. An inlet 25 formed on the side surface of the air cleaner case 24 is connected to a flexible duct 26, and its upstream end is connected to the front part of the bottom plate 9a of the rear frame 9 and communicates with the inside of the helmet storage box 12. A guard net 27 is placed over the upper surface of the communication hole of the rear frame bottom plate 9a to prevent the communication hole from being blocked by the helmet 11 or other stored items.

As shown in FIG. 2, a ventilation hole 28 is opened in the upper side of the rear frame 9. As shown in FIG. The ventilation hole 28 is located in a position hidden by the hem 5a of the seat 5, and a mesh plate 2 is provided on the inner surface.
9 is stretched.

Air taken into the engine 4 is thus supplied via the helmet storage box 12. Clean outside air can be taken in from a place isolated from the atmosphere under the rear body (rear frame 9) where a large amount of muddy water and dust stirred up by the rotation of the rear wheels 2 exists. The inside of the helmet storage box 12 is originally waterproof and dustproof and is almost sealed, and most of the air is absorbed through the mesh plate 2 of the ventilation hole 28.
The air inside the helmet storage box 12 is kept extremely low in moisture and foreign matter. Therefore, relatively clean air is supplied to the air cleaner case 24, the filter is less worn out, and its durability is greatly improved, the air intake efficiency is good, and the engine output is maintained at a high level. As for the helmet storage box 12, ventilation is always promoted to prevent hot air and moisture from entering, and its volume has the effect of reducing intake noise.

FIG. 3 shows another embodiment of the present invention, in which an air cleaner device is disposed in one corner of the helmet storage box 12 using a filter 30 and a perforated plate 31. This air cleaner device is directly connected to the carburetor 23 via a flexible duct 26.

In addition, FIG. 4 shows a case where a guard plate 32 is arranged on the upper surface of the bottom plate 9a in place of the guard net, and if it has the effect of preventing the communication hole from being blocked by stored items, the structure of the guard member in this part can be changed. Be free. Furthermore, 33 is a communication pipe installed upright on the bottom plate 9a, and the upstream end of the flexible duct 26 is opened at the top of the helmet storage hook 12, so that moisture and dust may accumulate on the bottom plate 9a over a long period of time (q Because
This prevents the air from being sucked into the air cleaner case.

In each of the above embodiments, the connection portion at the upstream end of the flexible duct 26 is preferably set at a position close to the pivot portion 34 of the unit swing engine, so that distortion of the flexible duct due to relative displacement can be minimized.

〔Effect of the invention〕

As mentioned above, the intake system for a scooter-type vehicle according to the present invention is designed to intake air to be supplied to the engine from inside the helmet storage box, thereby preventing moisture and dust from entering and improving the durability of the filter. This has the effect of maintaining engine output performance at a high level, promoting ventilation inside the helmet storage box, and reducing intake system noise.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of a scooter, not showing an embodiment of the invention, Fig. 2 is an enlarged longitudinal sectional view taken along the line A-Δ in Fig. FIG. 4 is a longitudinal side view of a portion of a helmet storage box showing still another embodiment of the present invention. 1...front wheel, 2...rear wheel, 4..., 1 engine, 5
... Seat, 6... Step board, 9... Rear frame, 11... Helmet, 12... Helmet storage box, 23... Carburetor, 24... Air cleaner case, 25... Inlet 1-126...
・Flexible duct.

Claims (1)

[Claims] An intake device for a scooter type vehicle, characterized in that the inlet of an air cleaner that supplies air to the engine is communicated with the helmet storage box in the scooter type vehicle equipped with a helmet storage box that uses a seat as a lid.