Inner concealed oil cell of two-wheel motorcycle preventing ventilation hole from spilling oil

Abstract

The invention discloses an air vent oil leakage-proof built-in gasoline tank for two-wheeled motorcycle, comprising a gasoline tank, a gasoline tank cover, a gasoline tank housing, a throughhole, and an automatic on-off vent device, wherein the gasoline tank is covered with the gasoline tank cover, which is arranged on the gasoline tank; the throughhole is arranged on the top end face of the gasoline tank housing; the automatic on-off vent device is positioned on the upper end of the throughhole and is fixedly connected with the housing. The automatic on-off vent device comprises a valve body and a cover body; wherein the valve body is fixedly connected at the bottom of the cover body; a valve base with a downward cavity mouth is arranged on the lower part of the valve body; an air vent is positioned on the top part of the valve cavity of the valve base; a sphere valve core is arranged in the valve cavity, which has the displacement degree of freedom to the top part of the valve cavity; the bottom of the valve cavity is sealed with a back cover; a blowhole is arranged on the sidewall of the valve base, which is communicated with a intra-cavity of the housing; the cover body is provided with a vent pipe connected with a purification device. The invention not only can open to ventilate in an ordinary condition, but also can automatically close when the motorcycle turns sideways, so as to prevent the gasoline in gasoline tank from flowing into the purification device through the vent pipe.

Description

technical field [0001] The utility model relates to a motorcycle fuel tank, in particular to a built-in fuel tank for preventing oil leakage from a vent hole of a two-wheeled motorcycle. Background technique [0002] The built-in fuel tank of the two-wheeled motorcycle is covered and shielded by an external cover after being installed on the vehicle frame. The current two-wheel motorcycle built-in fuel tank can be normally carried out in order to solve the fuel supply to the engine, and the fuel tank cover is provided with vent holes to communicate the fuel tank cavity with the atmosphere, so that the air pressure in the fuel tank is the same as the atmosphere. When the fuel tank is used to supply oil to the engine, it can be smoothly carried out; and, after the engine stops working, the gasoline vapor in the fuel tank can be directly discharged into the atmosphere through the vent hole, decompressing the cavity of the fuel tank. With the increasing requirements for motorcy...

AI Technical Summary

Problems solved by technology

With the increasing requirements for motorcycle emissions, the country does not allow the gasoline vapor in the fuel tank to be directly discharged into the atmosphere, and the gasoline vapor must be purified before being discharged, which leads to the existing direct discharge vent on the fuel tank cover. The structure of the air hole is no longer usable, and the existing fuel tank structure needs to be improved

Since the built-in fuel tank of the two-wheeled motorcycle is installed on the frame and covered by the external cover, the gap between its periphery and the cover is extremely small, and the device for purifying gasoline vapor cannot be installed on the fuel tank, and the fuel tank For reasons of safety and ease of use, the cover body is relatively small, and there is no space for a purification treatment device on the small fuel tank cover

And once the problem of gasoline vapor purification from the fuel tank is solved, how to solve the problem that after the two-wheeled motorcycle rolls over, the gasoline in the fuel tank flows into the purification treatment device along the vent hole, destroying the performance of the medium used for purification treatment in the purification device , causing the purification treatment device to lose its purification function, it has become a difficult problem in the current motorcycle manufacturing industry

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