CN206439123U - Canister - Google Patents

Abstract

The utility model discloses a carbon tank, which comprises a shell, an adsorption tube, a desorption tube, an air vent tube, a baffle plate and a filter plate. The utility model reserves a space at the mouth of the gas pipe inside the carbon tank. When the regulations impose strict emission requirements on the fuel system alone, a honeycomb-shaped activated carbon column can be installed in the reserved space. When the system puts forward strict emission requirements, the space can be filled with conventional activated carbon, so that a set of molds can be used to produce carbon canisters that meet the requirements of different evaporative emission regulations. The carbon canister is simple in structure, low in cost, easy to arrange, and versatile. it is good.

Description

charcoal canister

technical field

The utility model relates to a device for reducing the evaporative emission of automobile fuel oil, in particular to a carbon tank.

Background technique

In order to prevent the fuel vapor in the vehicle fuel system from being directly discharged into the atmosphere to pollute the environment, a set of fuel evaporation control system is usually used. The main part of the system is an activated carbon tank assembly, which uses the adsorption of activated carbon to first absorb the fuel vapor generated in the fuel system into the activated carbon tank to prevent it from being discharged into the atmosphere. When the engine is running, the gas produced in the intake manifold The negative pressure can desorb the fuel vapor in the activated carbon tank to the engine for combustion, and the desorbed activated carbon tank can re-adsorb the fuel vapor generated in the fuel system, reciprocating in turn.

At present, the fuel evaporative emission regulations have relatively low requirements, and there is no separate emission requirement for the fuel system, and the traditional activated carbon canister can meet the requirements. The traditional activated carbon canister cannot meet the emission requirements. Usually, an extra honeycomb-shaped activated carbon column with a special structure is connected in series outside the vent pipe of the canister. The carbon column has a strong adsorption capacity. When fuel vapor leaks from the mouth of the air pipe, it first enters this special area, and most of the fuel vapor is absorbed by the activated carbon column with strong adsorption capacity, which can effectively reduce the leakage of fuel vapor from the mouth of the air pipe and meet the requirements for Stringent emission requirements imposed by the fuel system. However, with this method, an additional honeycomb activated carbon column assembly (including the outer shell) needs to be added outside the carbon tank, resulting in a more complicated structure, large space occupation, difficult layout, and high cost.

Utility model content

The purpose of the utility model is to provide a charcoal canister, which can meet the requirements of different emission regulations, and avoids the method of adopting additional series-connected activated carbon columns outside the conventional charcoal canister.

The utility model adopts the following technical solutions to solve the technical problems: a carbon tank, which includes a shell, an adsorption tube, a desorption tube, an air vent tube, a baffle plate and a filter plate;

A baffle is provided inside the canister, and the baffle divides the interior of the housing into a conventional activated carbon area and a reserved area. The upper end of the baffle is fixed on the upper wall of the housing, and the baffle The lower end of the plate has a predetermined distance from the bottom wall of the housing;

Both the adsorption pipe and the desorption pipe are arranged on the upper wall of the housing, and are communicated with the conventional activated carbon area; the adsorption pipe is also communicated with the fuel tank, and the desorption pipe is also connected with the intake air Manifold connection;

A filter plate is horizontally arranged in the reserved area, and the filter plate divides the reserved area into an upper reserved area and a lower reserved area, and the lower reserved area and the conventional activated carbon area are filled with activated carbon, and the The upper reserved area is provided with activated carbon columns or filled with activated carbon;

The ventilation air pipe is arranged on the upper wall of the housing and communicates with the upper reserved area.

Optionally, the activated carbon column is a honeycomb activated carbon column.

The utility model has the following beneficial effects: the charcoal tank of this embodiment reserves a space (upper reserved area) at the pipe opening of the air pipe inside it, and when the regulations put forward emission requirements for the fuel system alone, it can The honeycomb-shaped activated carbon column is installed in the reserved area, which can effectively reduce the leakage of fuel vapor from the mouth of the air pipe. The final honeycomb activated carbon column resumed its adsorption function. If the regulations do not require the fuel system to be discharged separately, the space can be filled with conventional activated carbon, so that a set of molds can be used to produce a carbon canister that meets the requirements of different evaporative emission regulations. The carbon canister has a simple structure, low cost, and easy layout. Easy and versatile.

Description of drawings

Fig. 1 is the sectional view of the charcoal tank of the present utility model;

The marks in the figure are: 1-shell; 2-adsorption tube; 3-desorption tube; 4-air pipe; 5-baffle; 6-filter plate; 7-activated carbon column; 8-activated carbon.

detailed description

Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is further elaborated.

Example 1

This embodiment provides a carbon canister, which includes a shell, an adsorption tube, a desorption tube, an air vent pipe, a baffle and a filter plate.

The inside of the carbon tank is provided with a baffle, and the baffle divides the interior of the housing into a conventional activated carbon area (the right side of the baffle in Figure 1) and a reserved area (the left side of the baffle in Figure 1) , the upper end of the baffle is fixed to the upper wall of the housing, and the lower end of the baffle has a predetermined distance from the bottom wall of the housing, so that the conventional activated carbon area communicates with the reserved area .

Both the adsorption tube and the desorption tube are arranged on the upper wall of the housing, and both communicate with the conventional activated carbon area; in this embodiment, the adsorption tube communicates with the fuel tank, and the desorption tube communicates with the engine The air intake manifold is connected; the vent pipe is arranged on the upper wall of the housing and communicates with the reserved area.

In this embodiment, a filter plate is arranged horizontally in the reserved area, and the filter plate divides the reserved area into an upper reserved area and a lower reserved area, and the lower reserved area and the conventional activated carbon area are filled with There is activated carbon, and the upper reserved area is provided with activated carbon columns or filled with activated carbon.

The air pipe communicates with the upper reserved area. In this embodiment, the air pipe is used for pressure balance during adsorption or desorption. Since the mouth of the air pipe directly communicates with the atmosphere, the mouth of the air pipe is connected to the atmosphere. A small part of the fuel vapor that has been adsorbed on the activated carbon will also diffuse out from the nozzle, resulting in leakage, so the nozzle is the main source of fuel evaporative emissions.

The charcoal canister of this embodiment reserves a space (upper reserved area) at the mouth of the air pipe inside it, and when the regulations separately propose emission requirements for the fuel system, honeycomb activated carbon can be installed in the upper reserved area The column can effectively reduce the leakage of fuel vapor from the mouth of the air pipe. When desorbing, because the honeycomb activated carbon column is close to the mouth of the air pipe, it can be guaranteed to be desorbed first, and the honeycomb activated carbon column will be desorbed again after desorption. Snap function has been restored. If the regulations do not require the fuel system to be discharged separately, the space can be filled with conventional activated carbon, so that a set of molds can be used to produce a carbon canister that meets the requirements of different evaporative emission regulations. The carbon canister has a simple structure, low cost, and easy layout. Easy and versatile.

The sequence of the above embodiments is only for convenience of description, and does not represent the advantages or disadvantages of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (2)

1. A charcoal canister, characterized in that it comprises a housing, an adsorption tube, a desorption tube, a ventilation pipe, a baffle plate and a filter plate; A baffle is provided inside the canister, and the baffle divides the interior of the housing into a conventional activated carbon area and a reserved area. The upper end of the baffle is fixed on the upper wall of the housing, and the baffle The lower end of the plate has a predetermined distance from the bottom wall of the housing; Both the adsorption pipe and the desorption pipe are arranged on the upper wall of the housing, and are communicated with the conventional activated carbon area; the adsorption pipe is also communicated with the fuel tank, and the desorption pipe is also connected with the intake air Manifold connection; A filter plate is horizontally arranged in the reserved area, and the filter plate divides the reserved area into an upper reserved area and a lower reserved area, and the lower reserved area and the conventional activated carbon area are filled with activated carbon, and the The upper reserved area is provided with activated carbon columns or filled with activated carbon; The ventilation air pipe is arranged on the upper wall of the housing and communicates with the upper reserved area. 2. The carbon canister according to claim 1, wherein the activated carbon column is a honeycomb activated carbon column.