KR101039901B1 - Canister for vehicle - Google Patents

Abstract

The present invention relates to a vehicle canister, comprising: a case having an activated carbon provided in a chamber, and a purge port, a loading port, and a standby port provided on an upper surface thereof so as to communicate with the chamber; A main partition wall configured to divide the chamber into a standby port area and a supply port area, and open at one side such that the standby port area and the supply port area communicate with each other; At least one auxiliary partition wall defining the supply port area and having an open structure at one side thereof; It characterized in that it comprises a ventilation resistance reduction unit provided in the auxiliary partition wall so that the ventilation resistance of the boil-off gas during the purge.

As a result, a path shortening effect can be obtained by providing a ventilation resistance reduction unit through which the boil-off gas can be guided through the auxiliary partition wall, thereby increasing the purge efficiency.

Description

 Car Canister {CANISTER FOR VEHICLE}

The present invention relates to a vehicle canister, and more particularly, to a vehicle canister that can reduce the ventilation resistance during purge.

In general, the exhaust gas of a vehicle cranks the exhaust gas discharged through the exhaust system after the fuel and gas mixture is combusted in the cylinder, the evaporated gas generated by the fuel evaporation in the fuel tank, and the mixer or unburned gas in the combustion chamber. It can be divided into blow-by gas flowing into the case.

The exhaust gas is more strongly regulated by North America's Onboard Refueling Vapor Recovery (ORVR) regulations for fuel boil-off gas, using the canister 101 as shown in FIG. 1 to control the boil-off gas. The evaporated gas is adsorbed and desorbed.

The canister 101 is provided with activated carbon (C ') inside the gas can be collected and absorbed by the activated carbon (C') when the engine is not driven, the engine is started and reaches a certain driving conditions ECU opens the Purge Control Solenoid Valve (hereinafter referred to as PCSV) to induce the evaporated gas collected in activated carbon (C ') into the intake machine by the intake negative pressure together with the outside air.

Here, the canister 101 will be described in more detail with reference to FIG. 1.

Canister 101 is provided with activated carbon (C ') in the chamber, the loading port 112, the purge port 111, the standby port 113, the case 110 is provided in order to communicate with the chamber; It is installed in the chamber in a vertical direction to divide the chamber into a standby port region and a loading / purge port region and consists of a partition wall 120 having a lower structure.

Here, the standby port area refers to the area of the chamber in which the standby port 113 is located based on the partition wall 120, and the loading / purge port area refers to the loading port 112 and the purge port (based on the partition wall 120). 111 refers to the area of the chamber where the location is located.

The loading port 112 is connected to the fuel tank side and is a passage through which evaporated gas evaporated from the fuel tank flows into the loading / purge port region, and the purge port 111 is connected to the purge side to activate activated carbon (C) by the engine negative pressure. ') Is a passage for degassing the vaporized gas is supplied to the engine, the standby port 113 is connected to the atmosphere side is a passage for entering the outside air during loading or purge.

By such a configuration, when the engine is not driven, when the boil-off gas is introduced into the chamber through the loading port 112, the boil-off gas is adsorbed and stored in the activated carbon C ′, and the air is discharged to the atmosphere through the atmospheric port 113. (See A 'in FIG. 1).

On the other hand, when IC oil opens the PCSV under constant driving conditions after the engine is driven, the boil-off gas adsorbed on the activated carbon (C ′) is separated by fresh outside air introduced through the atmospheric port (113). Together with the purge port 111 is sent to the intake machine and then burned in the combustion chamber (see B 'in FIG. 1).

However, in the canister 101 of the conventional vehicle, since the ratio between the supply port area and the atmospheric port area of the chamber is large, the adsorption efficiency per unit area during loading of the boil-off gas is not good, and activated carbon (C) is particularly used at the corner of the chamber. There was a problem in that a dead volume (R) is formed in which ') is not utilized.

Therefore, by installing an additional partition inside the chamber, the adsorption efficiency per unit area is increased. However, when the partition is additionally installed, since the path of the evaporation gas is long, the ventilation resistance is increased during purging, so that degassing is not performed well. There was a problem in that bleed emission was increased.

Accordingly, an object of the present invention is to install an additional bulkhead to increase the adsorption efficiency per unit area during loading, as well as to prevent the increase in aeration resistance of the boil-off gas during purging to facilitate degassing, thereby reducing bleed emission. To provide a canister.

According to the vehicle canister of the present invention, the activated carbon is provided in the chamber, the case provided with a purge port, a loading port, a standby port to communicate with the chamber on the upper surface; A main partition wall configured to divide the chamber into a standby port area and a supply port area, and open at one side such that the standby port area and the supply port area communicate with each other; At least one auxiliary partition wall defining the supply port area and having an open structure at one side thereof; It is achieved by the ventilation resistance reduction unit provided in the auxiliary partition wall so that the ventilation resistance of the boil-off gas during the purge is reduced.

Here, the auxiliary partition wall is located in the closest to the main partition wall, the first auxiliary partition wall made of a structure opposite to the open one side of the main partition wall; It is installed to be spaced apart from the first auxiliary partition wall and the supply port region divided into a purge port region and a loading port region, and comprises a second auxiliary partition wall made of an open structure on the same side as the open side of the main partition wall It is preferable.

The ventilation resistance reducing unit may include a first ventilation resistance reducing part including a first through part formed to penetrate the first auxiliary partition wall in a vertical direction, and a first guide plate inclined at one side of the first through part; It is preferable to include a second through resistance reducing portion consisting of a second through portion formed to be spaced apart in the longitudinal direction to the second auxiliary partition wall, and a second guide plate inclined on one side of the second through portion.

In this case, the first guide plate and the second guide plate may be inclined in opposite directions to each other.

The first guide plate and the second guide plate may be inclined in the same direction.

As described above, according to the present invention, in the structure of the canister in which the path of the boil-off gas is lengthened by the plurality of barrier ribs, the boil-off gas passes through each of the auxiliary barrier ribs in order to prevent the ventilation resistance of the boil-off gas from increasing during purge. By providing a ventilation resistance reduction unit that can be guided to provide a vehicle canister that can achieve the effect of shortening the path can be increased purge efficiency.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description, in various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, only the configuration different from the first embodiment will be described. do.

As shown in Figures 2 and 3, the vehicle canister 1 according to the present invention is largely provided with a case 10 having activated carbon (C) in the chamber, and the main body is installed in the chamber in a vertical direction to partition the chamber. The barrier rib 20 and the auxiliary barrier rib 30 may include a ventilation resistance reduction part 40 provided in the auxiliary barrier rib 30 so as to reduce the ventilation resistance of the boil-off gas during purging.

The canister (1) is provided with activated carbon (C) therein, so that the gas evaporated from the fuel tank when the engine is not driven is collected and absorbed and stored in the activated carbon (C). (ECU) opens the Purge Control Solenoid Valve (hereinafter referred to as PCSV) to induce the evaporated gas collected in the activated carbon C to the intake machine by the intake negative pressure together with the outside air.

At this time, the upper surface of the case 10 is provided with a purge port 11, a loading port 12, the standby port 13 in order, and activated carbon (C) for adsorbing and storing the boil-off gas in the chamber inside It is provided.

The purge port 11 is connected to the purge side and is a passage through which the boil-off gas collected in the activated carbon C is degassed by the engine underpressure to be supplied to the engine, and the loading port 12 is connected to the fuel tank side and is connected to the fuel tank side. The evaporated evaporated gas is a passage for entering the chamber, and the atmospheric port 13 is connected to the atmospheric side and is a passage for entering the outside air during loading or purging.

The main partition wall 20 largely divides the chamber into a standby port area and a supply port area. At this time, the lower end of the main partition wall 20 has an open structure so that the standby port area and the supply port area communicate with each other.

Here, the standby area refers to the area of the chamber in which the standby port 13 is located based on the main partition wall 20, and the supply port area refers to the loading port 12 and the purge port 11 based on the main partition wall 20. ) Means the area of the chamber where it is located.

The auxiliary partition wall 30 is provided to partition the supply port region, and is formed to be spaced apart from the first auxiliary partition wall 31 and the first auxiliary partition wall 31 which are installed vertically in a position closest to the main partition wall 20. It consists of two auxiliary partitions 32.

As described above, the auxiliary partition 30 further partitions the chamber that is largely divided into the supply port region and the atmospheric port region by the main partition wall 20, so that the adsorption efficiency per unit area may be increased when the boil-off gas is loaded. Therefore, the invalid area R generated in the conventional canister 101 can be minimized, so that the capacity of the canister 1 can be reduced.

The first auxiliary partition 31 has a structure in which an upper end opposite to the lower end of the main partition 20 is open, and the second auxiliary partition 32 is open in a lower end opposite to the upper end of the first auxiliary partition 31. Structure. That is, the main partition wall 20 and the second auxiliary partition wall 32 have a structure in which the lower end is opened, and the first auxiliary partition wall 31 positioned in the middle of the main partition wall 20 and the second auxiliary partition wall 32. Has an open top structure. As such, the opening positions of the main partition walls 20, the first auxiliary partition walls 31, and the second auxiliary partition walls 32 are alternately formed, thereby increasing the path of the boil-off gas and efficiently adsorbing the boil-off gas to the activated carbon C. It becomes possible.

On the other hand, the aeration resistance reduction unit 40 is a function of reducing the increase in the ventilation resistance of the evaporation gas when the path of the evaporation gas is prolonged by the auxiliary partition wall 30, the first auxiliary partition wall 31 largely The first ventilation resistance reduction unit 41 provided in the second and the second ventilation resistance reduction unit 42 provided in the second auxiliary partition 32 is made.

As illustrated in FIG. 4, the first ventilation resistance reducing unit 41 may include a first through part 51 formed to be spaced apart in the vertical direction, and a predetermined angle based on a lower end of the first through part 51. Θ) is composed of a first guide plate 61 provided to be inclined.

The first guide plate 61 is configured to be inclined at a predetermined angle Θ while being coupled to the lower end of the first through part 51 to open the upper side. Therefore, the boil-off gas introduced into the loading port 12 or the boil-off gas from the activated carbon C may be guided and moved by the first guide plate 61 through the first through part 51.

The second ventilation resistance reduction unit 42 includes a second through part 52 formed to be spaced apart in the vertical direction, and a second guide plate 62 provided to be inclined at an angle with respect to the upper end of the second through part 52. do.

The second guide plate 62 is configured to be inclined at a predetermined angle and coupled to an upper end of the second through part 52 to open a lower side thereof. Accordingly, the boil-off gas introduced into the loading port 12 or the boil-off gas from the activated carbon C may be guided and moved by the second guide plate 62 through the second through part 52.

By such a configuration, the flow of the boil-off gas in the vehicle canister 1 according to the first embodiment of the present invention will be briefly described with reference to FIGS. 2 and 3 as follows.

First, when the engine is not driven, when the boil-off gas in the fuel tank flows into the loading-port area of the chamber through the loading port 12, the boil-off gas passes through the first auxiliary partition 31 as shown in FIG. 2. It is divided into both sides and is guided by the main bulkhead 20 and the second auxiliary bulkhead 32 to be respectively adsorbed and stored in the activated carbon (C) while entering the atmospheric port region and the purge port region, the air is the atmospheric port 13 Through the atmosphere. In this process, the boil-off gas introduced into the loading port 12 is guided by the first guide plate 61 and the second guide plate 62 to fall into the first through part 51 and the second through part 52. do.

On the other hand, when IC oil opens the PCSV under a constant driving condition after the engine is driven, as shown in FIG. 3, the boil-off gas adsorbed on the activated carbon C is caused by fresh air introduced through the atmospheric port 13. It is separated and sent to the intake machine through the purge port 11 together with the outside air and then burned in the combustion chamber. In this process, the evaporated gas degassed from the activated carbon (C) is guided by the first guide plate 61 and the second guide plate 62, respectively, and is discharged into the first through part 51 and the second through part 52. Port 11.

Meanwhile, the ventilation resistance reduction unit 240 may be configured differently from the canister 201 of the second embodiment shown in FIG. 5.

The ventilation resistance reduction unit 240 in the second embodiment is largely divided into a first ventilation resistance reduction unit 41 and a second ventilation resistance reduction unit 242. In the first embodiment, the first guide plate 61 and the first ventilation plate reduction unit 240 are formed. While the second guide plate 62 is provided to be inclined in opposite directions, the second guide plate 62 is different in that the first guide plate 61 and the second guide plate 262 are provided to be inclined in the same direction.

That is, the ventilation resistance reduction part 240 of the second embodiment is based on the second through part 252 formed to be vertically spaced apart from the second auxiliary partition 32 and the lower end of the second through part 252. The second guide plate 262 is formed to be inclined at a predetermined angle, and the upper side is opened.

Here, the flow of the boil-off gas at the time of loading or purging the boil-off gas has been described in the first embodiment and will be omitted.

As described above, in the structure of the canister (1) 201 in which the path of the boil-off gas is lengthened by the plurality of partitions 20, 31, and 32, each auxiliary to prevent the increase in the aeration resistance of the boil-off gas at the time of purging. By providing the ventilation resistance reduction unit 40, 240 through which the boil-off gas can be guided through the partition walls 31 and 32, the path can be shortened and the purge efficiency can be increased.

In the above-described second embodiment, the first guide plate and the second guide plate are provided to be inclined in the same direction so that the upper side is opened based on the lower end, but the first guide plate and the second guide plate are inclined in the same direction so that the lower side is opened based on the upper end. Of course, it may be provided.

Meanwhile, in the above-described embodiment, the inclination directions of the first guide plate and the second guide plate are not limited thereto, and may be variously changed as long as they do not disturb the flow of the boil-off gas.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit and scope of the present invention. It will be apparent to those skilled in the art that such modifications belong to the claims of the present invention. .

1 is a cross-sectional view showing a canister of a conventional vehicle.

2 is a cross-sectional view schematically showing the flow of the boil-off gas during loading in the canister of the vehicle according to the first embodiment of the present invention.

3 is a cross-sectional view schematically showing the flow of the boil-off gas upon purging in the canister of the vehicle according to the first embodiment of the present invention.

4 is a perspective view illustrating the first auxiliary partition wall of FIG. 3.

5 is a cross-sectional view schematically showing the flow of the boil-off gas during loading or purging in the canister of the vehicle according to the second embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1: canister 10: case

11: Purge Port 12: Loading Port

13: Standby port 20: Main bulkhead

30: auxiliary partition wall 31: first auxiliary partition wall

32: second auxiliary bulkhead 40: ventilation resistance reduction unit

41: first ventilation resistance reduction unit 42: second ventilation resistance reduction unit

51: first through part 52: second through part

61: first guide plate 62: second guide plate

Claims (5)

delete delete A case provided with activated carbon in the chamber and provided with a purge port, a loading port, and a standby port to communicate with the chamber on an upper surface thereof; A main partition wall configured to divide the chamber into a standby port area and a supply port area, and open at one side such that the standby port area and the supply port area communicate with each other; A first auxiliary partition partitioning the supply port region and having a structure in which one side is opened, and having a structure adjacent to the main partition wall and having an open side opposite to the open side of the main partition wall; An auxiliary partition wall spaced apart from the partition wall so as to divide the supply port area into a purge port area and a loading port area, and having a second auxiliary partition wall configured to have an open side on the same side as the open side of the main partition wall; Including a ventilation resistance reduction portion provided in the auxiliary partition wall to reduce the ventilation resistance of the boil-off gas, The ventilation resistance reduction unit A first ventilation resistance reducing part including a first through part formed to penetrate the first auxiliary partition wall in a vertical direction, and a first guide plate inclined at one side of the first through part; And a second ventilation resistance reducing part including a second through part formed to be spaced apart from the second auxiliary partition wall in a vertical direction, and a second guide plate inclined at one side of the second through part. The method of claim 3, And the first guide plate and the second guide plate are inclined in opposite directions to each other. The method of claim 3, And the first guide plate and the second guide plate are inclined in the same direction.

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