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Carbon tank for adsorbing fuel vapor

A carbon canister and fuel technology, which is used in the collection/return of condensed fuel, adding non-fuel substances to fuel, engine components, etc., can solve the problems of limited desorption conditions, fatigue damage of diaphragms, and reduced anti-aging ability, etc. Achieve the effect of cost reduction, system structure simplification and reliability improvement

Active Publication Date: 2014-08-27
ZHEJIANG FAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this structure saves an interface on the engine intake port, it can eliminate the adverse effect on the normal operation of the engine due to the damage of the diaphragm valve, but the diaphragm valve cannot be omitted, the number of external pipelines has not been reduced, and because the control diaphragm The vacuum degree of the diaphragm valve is very small, which limits the desorption working condition, and the preload of the compression spring for the diaphragm seal has to be very small, which leads to the lower reliability of the diaphragm valve seal, and it is difficult to use a diaphragm with better strength. Fibre-reinforced materials, the diaphragm is more susceptible to fatigue damage
In addition, an external part and more pipeline joints are added, and its sealing and other anti-aging capabilities are reduced, which will reduce the reliability and service life of the system

Method used

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  • Carbon tank for adsorbing fuel vapor
  • Carbon tank for adsorbing fuel vapor
  • Carbon tank for adsorbing fuel vapor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 Shown is a cross-sectional view of the first embodiment provided by the present invention. The main components of the carbon tank include: adsorption nozzle 1, shell 2, first cavity 3, first support column 4, desorption port 5, desorption nozzle 6, first carbon isolation net 7, activated carbon 8, adsorption Port 9, third carbon isolation net 10, second carbon isolation net 11, second cavity 12, air vent 13, second support column 14, end cap 15. The adsorption nozzle 1 and the desorption nozzle are arranged on the housing 2 , and the gas vent 13 is arranged on the end cover 15 . The first carbon isolation net 7, the second carbon isolation net 11 and the housing 2 form a carbon chamber for storing activated carbon 8, and the adsorption port 9 extends into the inside of the carbon chamber, and its end is covered with a third carbon isolation net 10 , to prevent activated carbon 8 from entering the adsorption port 9. The first support column 4 supports...

Embodiment 2

[0029] Such as figure 2 Shown is a sectional view of the second embodiment provided by the present invention, which is a better solution than the first embodiment. and figure 1 Parts with the same name in the above use the same label, and the characteristics that are different from Example 1 are mainly: the carbon chamber is divided into left and right parts by a partition 10, the left carbon chamber stores activated carbon 8a, and the right carbon chamber stores activated carbon 8b. The port 9 leads to the middle of the first cavity 3, the desorption nozzle 6 is located at the lower right part of the housing 2, the lower end of the activated carbon 8b on the right is carried by the fourth carbon isolation net 20, and the third support column 21 supports the fourth carbon isolation The net 20 forms a third cavity 22 , and the desorption port 5 is located on the wall of the third cavity 22 .

[0030] figure 2 The working process of the shown carbon canister of the present ...

Embodiment 3

[0035] image 3 The sectional view showing the third embodiment provided by the present invention is a further optimization of the second embodiment. and figure 1 with figure 2 Components with the same names in the above use the same labels, and the main features that are different from Embodiment 2 are: the housing 2 is placed on the lower part, the end cover 15 is placed on the upper part, the adsorption nozzle 1 is set on the end cover 15, and the detachment nozzle 6 and the air vent 13 are arranged on the housing 2, and the partition 10 and the housing 2 are integrally injection-molded, so the structure is more compact, and the partition 10 is easy to completely isolate the activated carbon 8a on the left and the activated carbon 8b on the right, completely eliminating In order to ensure that the desorption air flow is directly short-circuited from the second cavity 12 to the third cavity 22, it is easy to ensure the desorption efficiency.

[0036] Figure 4 For an ex...

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Abstract

The invention relates to a carbon tank for adsorbing fuel vapor, which comprises a shell, an end cover, activated carbon, an adsorption port, a desorption port and an air vent port and is characterized in that the activated carbon is stored in a carbon chamber formed by the shell and the end cover, all communicating paths among the desorption port, the adsorption port and the air vent port comprise a section of path in the carbon chamber, and the length of the section of path is not smaller than one third of shortest cavity size of the carbon chamber.

Description

technical field [0001] The invention belongs to the technical field of harmful gas emission control of fuel machinery, and relates to motor vehicles such as automobiles and motorcycles, general fuel power devices such as gasoline generators and lawn mowers, and in particular to an activated carbon tank for absorbing fuel vapor. Background technique [0002] As an important part of fuel-fueled motor vehicles, the carbon canister is to temporarily absorb the fuel evaporated from the fuel tank in the activated carbon, and then desorbed by the intake air of the engine, and enters the combustion chamber of the engine to be burned, thereby preventing or reducing fuel consumption. Volatile into the atmosphere and waste and cause pollution to the atmospheric environment. The leakage of the carbon canister and its pipeline will not only cause fuel to be discharged into the atmosphere and cause pollution, but more importantly, it will affect the normal operation of the engine and even...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/08F02M33/04
Inventor 杨延相郗大光张平张建
Owner ZHEJIANG FAI ELECTRONICS
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