阅读说明：本技术 一种带有主动脱附功能的碳罐 (Carbon tank with active desorption function ) 是由 蒋明洁 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种带有主动脱附功能的碳罐,包括碳罐壳体,所述碳罐壳体上设有吸附口、脱附口和大气口,所述所述吸附口用于连接油箱,所述脱附口用于连接碳罐电磁阀,所述碳罐电磁阀与发动机进气歧管连接,所述脱附口通过离心风机与碳罐电磁阀连接。使用本发明提供的碳罐时,ECU会自动判断发动机状态,在需要碳罐内汽油蒸汽时自动启动电机,离心风机运转,主动将汽油蒸汽吸至发动机进气歧管内,避免了因真空不够导致碳罐内汽油蒸汽脱附效率低的情况。(The invention discloses a carbon tank with an active desorption function, which comprises a carbon tank shell, wherein an adsorption port, a desorption port and an atmosphere port are arranged on the carbon tank shell, the adsorption port is used for connecting an oil tank, the desorption port is used for connecting a carbon tank electromagnetic valve, the carbon tank electromagnetic valve is connected with an engine air inlet manifold, and the desorption port is connected with the carbon tank electromagnetic valve through a centrifugal fan. When the carbon tank provided by the invention is used, the ECU can automatically judge the state of the engine, the motor is automatically started when gasoline steam in the carbon tank is needed, the centrifugal fan runs, and the gasoline steam is actively sucked into the air inlet manifold of the engine, so that the condition that the desorption efficiency of the gasoline steam in the carbon tank is low due to insufficient vacuum is avoided.)

1. The utility model provides a carbon tank with active desorption function, includes the carbon tank casing, be equipped with on the carbon tank casing and adsorb mouth, desorption mouth and atmosphere mouth, it is used for connecting the oil tank to adsorb the mouth, the desorption mouth is used for connecting the carbon tank solenoid valve, the carbon tank solenoid valve is connected with engine intake manifold, its characterized in that, the desorption mouth is connected with the carbon tank solenoid valve through centrifugal fan.

2. The carbon tank with the active desorption function according to claim 1, wherein the centrifugal fan comprises an air suction port, an air outlet, an impeller, a motor and a housing, the desorption port is connected with the air suction port, and the air outlet is connected with the carbon tank solenoid valve.

3. The carbon tank with the active desorption function according to claim 2, wherein the centrifugal fan is provided with a control chip, the motor is connected with the control chip, the control chip is connected with the ECU, and the ECU controls the operation of the motor.

4. The carbon tank with the active desorption function as claimed in any one of claims 1 to 3, wherein the desorption port is connected with the air suction port through a hose.

5. The carbon tank with the active desorption function according to any one of claims 1 to 3, wherein a partition plate is arranged in the carbon tank shell to partition the carbon tank shell into a first cavity and a second cavity, a gap is arranged between the partition plate and an opening plane at the lower part of the carbon tank shell, the adsorption port and the desorption port are arranged in the first cavity, and the atmospheric port is arranged in the second cavity.

Technical Field

The invention relates to the technical field of automobile emission control, in particular to a carbon tank with an active desorption function

Background

The carbon tank is an important component in a gasoline evaporation control system (EVAP), and an adsorption port of the carbon tank in the prior art is connected with an oil tank, and a desorption port of the carbon tank is connected with a carbon tank electromagnetic valve which is directly connected to an engine intake manifold. The working principle is as follows: when the automobile runs or is flamed out, the pressure in the gas-oil cylinder gradually rises due to the volatility of the gasoline, and gasoline steam enters the carbon tank through a pipeline connected with the carbon tank and is adsorbed and stored by activated carbon in the carbon tank; after the engine is started, an electromagnetic valve of a fuel evaporation and purification device arranged between a carbon tank and an air inlet manifold is opened, and gasoline vapor stored in the carbon tank is sucked into the air inlet manifold to participate in combustion under the action of the negative pressure, so that the purposes of recycling the gasoline vapor and realizing energy conservation and emission reduction are achieved.

In recent years, the efficiency of fuel automobiles is higher and higher, the technologies of turbocharging, automatic start and stop and the like are popularized, the vacuum degree of an air inlet manifold is greatly reduced, and the gasoline steam in a carbon tank is difficult to desorb completely, so that the desorption flow is insufficient. The engine of the hybrid electric vehicle is closed for a large amount of time, and the fuel desorption capacity of the carbon tank volatilization is insufficient. In addition, the emission standard of the national six is more strict than that of the national five, and the existing EVAP can not continuously meet the increasingly strict emission standard any more.

Disclosure of Invention

In view of the above, the invention provides a carbon canister with an active desorption function, which aims at the problem that the desorption capacity of the carbon canister is insufficient due to insufficient negative pressure of an engine.

The invention adopts the specific technical scheme that:

the utility model provides a carbon tank with active desorption function, includes the carbon tank casing, be equipped with on the carbon tank casing and adsorb mouth, desorption mouth and atmosphere mouth, it is used for connecting the oil tank to adsorb the mouth, the desorption mouth is used for connecting the carbon tank solenoid valve, the carbon tank solenoid valve is connected with engine intake manifold, the desorption mouth passes through centrifugal fan and is connected with the carbon tank solenoid valve.

Furthermore, the centrifugal fan adopted by the invention is of the existing design and comprises an air suction port, an air outlet, an impeller, a motor, a shell and the like, wherein the desorption port is connected with the air suction port, and the air outlet is connected with the carbon tank electromagnetic valve.

Furthermore, the centrifugal fan is provided with a control chip, the motor is connected with the control chip, the control chip is connected with the ECU, and the ECU controls the operation of the motor.

Further, the desorption port is connected with the air suction port through a hose.

Further, be equipped with the baffle in the carbon tank casing and separate into first cavity and second cavity with the carbon tank casing, be equipped with the space between the opening plane of baffle and carbon tank casing lower part, adsorb the mouth with the desorption mouth is established at first cavity, the second cavity is established to the atmosphere mouth.

The invention has the beneficial effects that: when a common carbon tank is used, gasoline vapor in the carbon tank can be passively sucked into an engine only by means of vacuum of an engine intake manifold, and the desorption process of the carbon tank can be greatly influenced by the reduction of the vacuum degree of the engine intake manifold caused by various reasons; when the carbon tank provided by the invention is used, the ECU can automatically judge the state of the engine, the motor is automatically started when gasoline steam in the carbon tank is needed, the centrifugal fan runs, and the gasoline steam is actively sucked into the air inlet manifold of the engine, so that the condition that the desorption efficiency of the gasoline steam in the carbon tank is low due to insufficient vacuum is avoided.

Drawings

FIG. 1 is a schematic diagram of a portion of a canister of an embodiment gasoline vaporization control system arrangement;

fig. 2 is a schematic view of a centrifugal fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, this embodiment provides a carbon canister with active desorption function, including carbon canister casing 1, be equipped with the baffle in the carbon canister casing 1 and separate carbon canister casing 1 into first cavity 101 and second cavity 102, be equipped with the space between the opening plane of baffle and carbon canister casing 1 lower part, be equipped with on the first cavity 101 and adsorb mouth and desorption mouth, be equipped with the atmosphere mouth on the second cavity 102, it is used for connecting oil tank 2 to adsorb the mouth, the desorption mouth passes through centrifugal fan 5 and is connected with carbon canister solenoid valve 3, carbon canister solenoid valve 3 is connected with engine air intake manifold 4. The centrifugal fan 5 that this embodiment adopted is current design, as shown in fig. 2, and it includes cylinder tubulose induction port 6, impeller front bezel 9, impeller 8, impeller back plate 10, shell 12, cylinder tubulose gas outlet 7, motor 11, control chip 13 and the socket 14 of being connected with ECU, the desorption mouth with cylinder tubulose induction port 6 is connected, cylinder tubulose gas outlet 7 with carbon tank solenoid valve 3 is connected, the motor with control chip connects, control chip is connected with ECU (through socket 14), by ECU control motor's operation. The desorption port is connected with the cylindrical tubular air suction port 6 through a hose, so that the positions of the centrifugal fan 5 and the carbon tank can be flexibly arranged, and the installation performance is better.

When the automobile is started, the carbon tank electromagnetic valve 3 between the centrifugal fan 5 and the air inlet manifold 4 is opened, the ECU controls the motor of the centrifugal fan 5 to work, so that when the impeller 3 rotates, the mixed gas of gasoline steam and air between the blades rotates along with the impeller to obtain inertial centrifugal force, and the mixed gas of the gasoline steam and the air is thrown out from an outlet between the blades. The mixed gas of the thrown gasoline vapor and air is extruded into the casing 12, so that the pressure inside the casing 12 is increased and finally is guided to the cylindrical tubular air outlet 7 to be discharged. After the mixed gas of gasoline vapor and air is thrown out, the pressure at the center part of the impeller 3 is reduced. The mixed gas of gasoline vapor and air stored in the carbon tank can be continuously sucked from the cylindrical tubular air suction port 6 of the fan; the mixed gas of gasoline steam and air is sucked into the pump through a cylindrical tubular air suction port 1 of a centrifugal fan 5, is discharged from a cylindrical tubular air outlet 2, and enters an engine air inlet manifold 4 through an opened carbon tank electromagnetic valve 3 to participate in combustion.

According to the technical scheme, the carbon tank with the active desorption function provided by the embodiment can actively provide the pressure source required by the desorption of the carbon tank, and the carbon tank is not only required to be passively desorbed by the vacuum degree of the engine when needing to be desorbed, so that the problem of the reduction of the desorption efficiency of the carbon tank caused by the reduction of the vacuum degree of the air inlet manifold in the engine is solved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.