Fuel tank cap with carbon tank function

Abstract

The invention discloses a fuel tank cap with the carbon tank function. The fuel tank cap comprises an upper cap body (1), a tank body (7), carbon dust (4) and a supporting frame (6) used for containing the carbon dust (4). The supporting frame (6) is connected into the tank body (7) in a sleeved mode. The lower end of the supporting frame (6) is connected with the tank body (7) in a sealing mode. The supporting frame (6) is provided with a center tube pillar (8) and a continuous channel (9) used for lengthening an oil vapor circulating path. The starting end of the continuous channel (9) communicates with the center tube pillar (8), and the stop end of the continuous channel (9) communicates with the outside of a fuel tank. A first air hole (20) communicating with a fuel tank inner cavity and a second air hole (21) communicating with the outside of the fuel tank are formed in the bottom of the tank body (7). The first air hole (20) communicates with the center tube pillar (8), and the second air hole (21) communicates with the stop end of the continuous channel (9). By the adoption of the structure, the fuel tank cap is more compact in structure and is more suitable for small-sized mechanical equipment; and moreover, the circulating path of fuel oil steam is greatly prolonged, and adsorption efficiency is made higher.

Description

technical field [0001] The invention relates to an oil tank cap with the function of a carbon tank. Background technique [0002] Usually, a carbon tank is installed between the gasoline tank and the engine, because activated carbon has an adsorption function. When the car is running or turned off, the fuel vapor in the fuel tank enters the upper part of the activated carbon tank through the pipeline, and the fresh air flows from the activated carbon tank. The lower part enters the activated carbon tank. After the engine is turned off, gasoline vapor and fresh air are mixed in the tank and stored in the activated carbon tank. When the engine is started, the solenoid valve of the fuel evaporation purification device installed between the activated carbon tank and the intake manifold opens, and the activated carbon tank Gasoline vapors are drawn into the intake manifold for combustion. In the prior art, the carbon canister and the fuel tank are generally installed separately...

AI Technical Summary

Problems solved by technology

However, its disadvantages are: the carbon canister and fuel tank are separated, in other words, the carbon canister is installed outside the fuel tank, and the carbon canister is connected to the fuel tank through the oil pipe. Therefore, the overall structure is scattered and takes up a lot of space, which is not suitable Smaller mechanical equipment, such as small-displacement gasoline engines such as garden machinery

Images