JPH0635885Y2 - Auto buy new air introduction device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a fresh air introduction device for a motorcycle.

[Technical background and problems of the invention] In motorcycles, an air cleaner is connected to the rear side of the engine through a carburetor, and the air from which dust has been removed by the air cleaner is used as intake air, and fuel is mixed by the carburetor. The engine is inhaling. The air cleaner does not let in the hot air near the engine, and it guides the fresh air received during driving to the air cleaner. However, if the wind from fresh air hits the intake port of the air cleaner,
There is an inconvenience that the air pressure changes depending on the traveling speed and the air-fuel ratio changes. Therefore, there is an air cleaner provided with a suction port on the rear side. See, for example, Japanese Utility Model Publication No. 60-145932. However, if the intake port of the air cleaner is on the rear side, the introduction of fresh air will be difficult.

[Purpose of device]

In consideration of this point, the present invention provides an intake port of an air cleaner arranged on the rear side of the engine on the rear side to prevent the hot air of the engine from being sucked in, and moreover, fresh air can be sucked in without changing the atmospheric pressure, It is an object of the present invention to obtain a new air introduction device for a motorcycle that can achieve stable air-fueling.

[Constitution of device]

 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

An air cleaner 3 is connected to the rear side of the engine 1 via a carburetor 2. The air cleaner 3 is located on the lower rear side of the fuel tank 4, and the fresh air ejection port 6 attached to the frame 5 is arranged on the upper side of the air cleaner 3. The fresh air ejection port 6 allows fresh air to be ejected rearward. The hose 7 guides the front side to the front part of the vehicle body so that the wind from running can enter. On the rear side of the air cleaner 3, left and right side plates 8 and a rear lower plate 9 made of an elastic material forming a rear wall and a bottom wall are formed, and a rear half of the upper surface is covered with a seat bottom plate 10. Cover member is provided. The rear portion of the air cleaner 3 is inserted into the front portion of the box-shaped cover member, and the fresh air outlet 6 attached to the hose 7 is also inserted.
Is opened corresponding to the opening in the front half of the upper surface of the cover member so that fresh air introduced by the hose is introduced. Then, parts such as the battery 11 are arranged in the box-shaped large volume to effectively use the volume. The air cleaner 3 has a suction port 12 on its rear surface, which is inside the box.

Although the hot air of the engine 1 flows backward, the hot air is prevented from entering the intake port 12 because it is separated from the intake port 12 of the air cleaner 3, the left and right side plates 8 and the rear lower plate 9. As the vehicle travels, fresh air from the air is blown backward from the fresh air jet port 6, and the fresh air is stored in a large-volume box made up of the left and right side plates 8 rear lower plate 9 and seat bottom plate 10. Flowing. Air cleaner 3 suction port 12
Is rearward, and the fresh air in the box shape can be appropriately sucked by the suction of the engine 1 without being subjected to the pressure fluctuation of the fresh air flow. In this way, since the intake negative pressure is stable, the air-fuel ratio is also stable. In addition, it is difficult to make the rear side of the air cleaner 3 into a box with a large volume, but it is difficult for a motorcycle without space, but by arranging parts such as the battery 11 inside, a relatively large volume can be obtained and the intake pressure can be increased. Is stable.

[Effect of device]

As described above, the present invention arranges the air cleaner having the suction port on the rear side on the lower side of the fuel tank on the rear side of the engine, and arranges the rear part of the air cleaner having the suction port on the left and right sides. A fresh air introduction hose that is formed by both side plates and a rear lower plate that forms a rear wall and a bottom wall and is inserted into a box-shaped cover member that covers the rear half of the upper surface with the seat bottom plate and opens the front end to the front of the vehicle body. Since the rear end of the cover member is opened to correspond to the opening of the upper half of the upper surface of the cover member and the battery is housed in the cover member, it is possible to prevent intake of hot air from the engine to the intake port of the air cleaner. In addition, stable air intake can be achieved and stable air-fuel ratio can be achieved without being affected by changes in wind pressure due to running fresh air. The large volume formed by the left and right side plates and the lower rear plate allows the inside to be effectively used while accommodating a battery or the like inside and increasing the volume.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an overall side view, FIG. 2 is an enlarged side view of a main part, and FIG. 3 is a plan view of the same. 1 ... Engine, 3 ... Air cleaner, 4 ... Fuel tank, 6 ... Fresh air ejection port, 8 ... Side plate, 9 ... Rear lower plate, 10 ... Seat bottom plate, 11 ... Battery, 12 ... Suction port.

Claims (1)

[Scope of utility model registration request] 1. An air cleaner having an intake port on the rear side is arranged below the fuel tank on the rear side of the engine, and the rear part of the air cleaner provided with the intake port is connected to the left and right side plates and the rear side. The rear end of the fresh air introduction hose whose front end is opened to the vehicle body front part is inserted into a box-shaped cover member that is formed by the rear lower plate that forms the wall and the bottom wall, and covers the rear half of the upper surface with the seat bottom plate. A fresh air introduction device for a motorcycle, characterized in that the cover member has an opening corresponding to the opening in the front half of the upper surface, and a battery is housed in the cover member.