Carbon tank fuel tank cap assembly

Abstract

The invention relates to a carbon tank fuel tank cap assembly. The carbon tank fuel tank cap assembly comprises an outer cap and an inner cap. A cavity with an upper end opening is formed in the inner cap, the outer cap is arranged above the inner cap, and the upper end opening of the cavity is covered by the outer cap; a lower vent cap is arranged in the cavity, and the cavity is divided into a filling cavity and a volume cavity by the lower vent cap; the filling cavity is located above the volume cavity, the filling cavity is filled with absorption filling materials, and through holes are formed in the middle of the lower vent cap; a breathing valve used for being automatically opened when the air pressure of the filling cavity and the air pressure of the volume cavity are unbalanced is arranged on the through holes, a first air vent hole is formed in the bottom surface of the volume cavity, and a second air vent hole is formed in the bottom surface of the filling cavity; and an outward discharge channel used for fuel gas volatilizing in a fuel tank is formed by the first air vent hole, the breathing valve and the second air vent hole in sequence. According to the carbon tank fuel tank cap assembly, fuel gas and fuel are not prone to overflowing while the air pressure balance in the fuel tank with a fuel tank cap is guaranteed since the gas discharge channel is automatically opened by the breathing valve when inner and outer air pressure of the fuel tank is unbalanced, and air can also smoothly enter the fuel tank, so that normal fuel supply is guaranteed.

Description

technical field [0001] The invention relates to the technical field of mechanical structures, in particular to a carbon tank fuel tank cover assembly. Background technique [0002] At present, many devices are equipped with pressure relief valves in order to maintain the balance of internal and external air pressure. Such as fuel tank etc., the fuel tank cover of existing gasoline, diesel engine fuel tank all adopts carbon powder and adsorption sponge to stop gasoline diesel oil from volatilizing and overflowing. But the result is unsatisfactory, and a large amount of volatile gases are directly discharged into the atmospheric environment to pollute the air. Especially when the engine is shaken, tilted, or even turned upside down during operation, a large amount of oil and gas will overflow, seriously pollute the air and the environment, affect people's health, and even cause safety hazards such as spontaneous combustion. Contents of the invention [0003] The technical ...

AI Technical Summary

Problems solved by technology

But the result is unsatisfactory, a large amount of volatile gas is directly discharged into the atmosphere to pollute the air

Especially when the engine is shaken, tilted, or even turned upside down, a large amount of oil and gas will overflow, which will seriously pollute the air and environment, affect people's health, and even cause safety hazards such as spontaneous combustion.

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