Adsorber of fuel vapor of motorcycles

Abstract

The invention discloses an adsorber of fuel vapor of motorcycles. A fuel tank cap with a pressure balance channel is installed in a refill opening at the top of a fuel tank, the fuel tank cap is provided with a fuel tank cap upper shell, an internal component and a fuel tank cap lower shell, the internal component is installed in the fuel tank cap lower shell, the bottom of the fuel tank cap lower shell is provided with a gas inlet of the pressure balance channel and the top thereof is provided with a flanging, the fuel tank cap upper shell is buckled on the flanging, a gas outlet of the pressure balance channel is arranged on the top wall of the fuel tank cap upper shell and is connected with a joint, the joint is connected with the inlet of a carbon canister by an adsorption tube and the outlet of the carbon canister is connected with a carburetor by a desorption tube. The adsorber not only can balance the pressure inside and outside the fuel tank and ensure the fuel tank to normally supply fuel to the carburetor via a fuel tank switch, but also can adsorb the fuel vapor, prevent the fuel vapor from being exhausted into the atmosphere to pollute the environment and avoid fuel waste, and has the characteristics of reasonable design, easy implementation, reliable performance, low cost, strong universality, etc.

Description

technical field [0001] The invention belongs to the technical field of motorcycles, and in particular relates to an oil vapor adsorption device on motorcycles. Background technique [0002] The motorcycle fuel tank cap is installed in the filler port on the top of the fuel tank to seal the filler port and collect oil and gas. like Figure 5 As shown, the traditional fuel tank cap is composed of three parts: the fuel tank cap upper shell 2, the fuel tank cap lower shell 4 and the internal component 3, wherein the internal component 3 is installed in the fuel tank cap lower shell 4, and the top of the fuel tank cap lower shell 4 has a flip side 4a, the section of the flange 4a is "∩" shape, the fuel tank cap upper shell 2 is buckled on the flange 4a at the top of the fuel tank cap lower shell 4, and the peripheral side wall of the fuel tank cap upper shell 2 is in contact with the fuel tank cap The outer ring wall of the "∩" shaped flange 4a of the lower shell fits together, ...

AI Technical Summary

Problems solved by technology

[0004] 1. The anti-roll valve outside the fuel tank needs to be processed separately, and it needs to be equipped with accessories such as hoops, which increases the production cost of the motorcycle

[0005] 2. Different models of motorcycles have different fuel tank structures. The above-mentioned scheme finds a point on the fuel tank to connect the adsorption tube, which greatly changes the structure of the fuel tank, and the versatility of the fuel tank structures of different models is poor, which increases the transformation cost.

[0006] 3. The anti-dump valve is outside the fuel tank, and the part connected to the fuel tank through the adsorption tube is located at the highest point of the fuel tank. Although it can prevent the fuel from splashing into the fuel evaporation tube, when the motorcycle tilts or falls, the fuel will flow into the anti-dumping valve. The adsorption pipe in front of the dump valve cannot flow back to the fuel tank, which will cause pipeline blockage. On the one hand, the function of absorbing oil vapor will be invalid; normal oil supply

[0007] 4. The fuel tank cover basically imitates the traditional structure. It is difficult to completely fit between the "∩" shaped flange of the lower shell of the fuel tank cover and the side wall of the upper shell of the fuel tank cover. There will be small gaps, and the oil vapor in the fuel tank can easily pass through the small gaps. Outward leakage still has the problems of environmental pollution and fuel waste, which cannot meet the requirements of the National III standard

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