Claims
- 1. A canister in which adsorbent layers of a first layer and a second layer obtained by dividing an adsorbent layer with a partition wall are arrange in series, wherein the adsorbent layer of the first layer is filled with activated carbon (activated carbon A) having a large evaporated fuel adsorption and a weak holding power, and the adsorbent layer of the second layer is filled with activated carbon (activated carbon B) having an intermediate evaporated fuel adsorption and a weak holding power.
- 2. A canister in which adsorbent layers of a first layer and a second layer obtained by dividing an adsorbent layer with a partition wall are arranged in series, wherein the adsorbent layer of the first layer is filled with activated carbon A having a large evaporated fuel adsorption and a weak holding power, and the adsorbent layer of the second layer is filled with activated carbon B having an evaporated fuel adsorption smaller than that of the activated carbon A and a holding power for evaporated fuel, substantially equal to that of the activated carbon A.
- 3. A canister in which adsorbent layers of a first layer and a second layer obtained by dividing an adsorbent layer with a partition wall are arranged in series, wherein the adsorbent layer of the first layer is formed of activated carbon A, the adsorbent layer of the second layer is formed of activated carbon B, an evaporated fuel adsorption of the activated carbon A is larger than that of the activated carbon B, and a holding power for evaporated fuel of the activated carbon A is substantially equal to that of the activated carbon B.
- 4. The canister according to claim 1, wherein to the activated carbons A and B is applied activated carbon which has a peak position of a differential pore distribution in the vicinity of a desorption limit line.
- 5. The canister according to claim 2, wherein to the activated carbons A and B is applied activated carbon which has a peak position of a differential pore distribution in the vicinity of a desorption limit line.
- 6. The canister according to claim 3, wherein to the activated carbons A and B is applied activated carbon which has a peak position of a differential pore distribution in the vicinity of a desorption limit line.
- 7. The canister according to claim 1, wherein to the activated carbon A is applied activated carbon having a large pore volume, and to the activated carbon B is applied activated carbon having a pore volume which is smaller than that of the activated carbon A.
- 8. The canister according to claim 2, wherein to the activated carbon A is applied activated carbon having a large pore volume, and to the activated carbon B is applied activated carbon having a pore volume which is smaller than that of the activated carbon A.
- 9. The canister according to claim 3, wherein to the activated carbon A is applied activated carbon having a large pore volume, and to the activated carbon B is applied activated carbon having a pore volume which is smaller than that of the activated carbon A.
- 10. The canister according to claim 1, wherein to the activated carbon A is applied activated carbon in which a peak in the differential pore distribution is positioned at a pore diameter of about 2.5 nm and whose pore volume is large, and to the activated carbon B is applied activated carbon in which a peak in the differential pore distribution is positioned at the pore diameter of about 2.5 nm and whose pore volume is smaller than that of the activated carbon A.
- 11. The canister according to claim 2, wherein to the activated carbon A is applied activated carbon in which a peak in the differential pore distribution is positioned at a pore diameter of about 2.5 nm and whose pore volume is large, and to the activated carbon B is applied activated carbon in which a peak in the differential pore distribution is positioned at the pore diameter of about 2.5 nm and whose pore volume is smaller than that of the activated carbon A.
- 12. The canister according to claim 3, wherein to the activated carbon A is applied activated carbon in which a peak in the differential pore distribution is positioned at a pore diameter of about 2.5 nm and whose pore volume is large, and to the activated carbon B is applied activated carbon in which a peak in the differential pore distribution is positioned at the pore diameter of about 2.5 nm and whose pore volume is smaller than that of the activated carbon A.
- 13. The canister according to claim 1, wherein the adsorbent layer of the second layer is divided into two portions by a filter or a plate having air permeability to form a second and a third adsorbent layers in the case that the adsorbent layer of the first layer is referred to as the first adsorbent layer.
- 14. The canister according to claim 2, wherein the adsorbent layer of the second layer is divided into two portions by a filter or a plate having air permeability to form a second and a third adsorbent layers in the case that the adsorbent layer of the first layer is referred to as the first adsorbent layer.
- 15. The canister according to claim 3, wherein the adsorbent layer of the second layer is divided into two portions by a filter or a plate having air permeability to form a second and a third adsorbent layers in the case that the adsorbent layer of the first layer is referred to as the first adsorbent layer.
- 16. A canister in which adsorbent layers of a first layer and a second layer obtained by dividing an adsorbent layer with a partition wall are arrange in series, wherein the adsorbent layer of the second layer is divided into two portions by a filter or a plate having air permeability to form a second and a third adsorbent layers; the adsorbent layer of the first layer, i.e., the first adsorbent layer is filled with activated carbon (activated carbon A) having a large evaporated fuel adsorption and a weak holding power; the second adsorbent layer is filled with activated carbon (activated carbon B) having an intermediate evaporated fuel adsorption and a weak holding power; and the third adsorbent layer is filled with activated carbon (activated carbon C) having a small evaporated fuel adsorption and a strong holding power.
- 17. A canister in which adsorbent layers of a first layer and a second layer obtained by dividing an adsorbent layer with a partition wall are arranged in series, wherein the adsorbent layer of the second layer is divided into two portions by a filter or a plate having air permeability to form second and third adsorbent layers; the adsorbent layer of the first layer, that is, the first adsorbent layer is filled with activated carbon A having a large evaporated fuel adsorption and a weak holding power; the second adsorbent layer is filled with activated carbon B which has an evaporated fuel adsorption smaller than that of the activated carbon A and whose holding power for evaporated fuel is substantially equal to that of the activated carbon A; and the third adsorbent layer is filled with activated carbon C which has an evaporated fuel adsorption smaller than that of the activated carbon B and whose holding power for the evaporated fuel is stronger than those of the activated carbons A and B.
- 18. A canister in which adsorbent layers of a first layer and a second layer obtained by dividing an adsorbent layer with a partition wall are arranged in series, wherein the adsorbent layer of the second layer is divided into two portions by a filter or a plate having air permeability to form second and third adsorbent layers; the adsorbent layer of the first layer, that is, the first adsorbent layer is filled with activated carbon A; the second adsorbent layer is filled with activated carbon B; the third adsorbent layer is filled with activated carbon C; an evaporated fuel adsorption of the activated carbon B is smaller than that of the activated carbon A; the evaporated fuel adsorption of the activated carbon C is smaller than that of the activated carbon B; a holding power for evaporated fuel of the activated carbon A is substantially equal to that of the activated carbon B; and the holding power for evaporated fuel of the activated carbon C is stronger than those of the activated carbons A and B.
- 19. The canister according to claim 16, wherein to the activated carbons A and B is applied activated carbon which has a peak position of a differential pore distribution in the vicinity of a desorption limit line, and to the activated carbon C is applied activated carbon whose peak position of the differential pore distribution deviates toward a remaining region side from the desorption limit line.
- 20. The canister according to claim 17, wherein to the activated carbons A and B is applied activated carbon which has a peak position of a differential pore distribution in the vicinity of a desorption limit line, and to the activated carbon C is applied activated carbon whose peak position of the differential pore distribution deviates toward a remaining region side from the desorption limit line.
- 21. The canister according to claim 18, wherein to the activated carbons A and B is applied activated carbon which has a peak position of a differential pore distribution in the vicinity of a desorption limit line, and to the activated carbon C is applied activated carbon whose peak position of the differential pore distribution deviates toward a remaining region side from the desorption limit line.
- 22. The canister according to claim 16, wherein to the activated carbon A is applied activated carbon having a large pore volume, to the activated carbon B is applied activated carbon having a pore volume which is smaller than that of the activated carbon A, and to the activated carbon C is applied activated carbon whose pore volume is smaller than those of the activated carbons A and B.
- 23. The canister according to claim 17, wherein to the activated carbon A is applied activated carbon having a large pore volume, to the activated carbon B is applied activated carbon having a pore volume which is smaller than that of the activated carbon A, and to the activated carbon C is applied activated carbon whose pore volume is smaller than those of the activated carbons A and B.
- 24. The canister according to claim 18, wherein to the activated carbon A is applied activated carbon having a large pore volume, to the activated carbon B is applied activated carbon having a pore volume which is smaller than that of the activated carbon A, and to the activated carbon C is applied activated carbon whose pore volume is smaller than those of the activated carbons A and B.
- 25. The canister according to claim 16, wherein to the activated carbon A is applied activated carbon in which a peak in the differential pore distribution is positioned at a pore diameter of about 2.5 nm and whose pore volume is large, to the activated carbon B is applied activated carbon in which the peak in the differential pore distribution is positioned at the pore diameter of about 2.5 nm and whose pore volume is smaller than that of the activated carbon A, and to the activated carbon C is applied activated carbon in which the peak in the differential pore distribution is positioned at the pore having the diameter of about 2 nm and whose pore volume is smaller than those of the activated carbons A and B.
- 26. The canister according to claim 17, wherein to the activated carbon A is applied activated carbon in which a peak in the differential pore distribution is positioned at a pore diameter of about 2.5 nm and whose pore volume is large, to the activated carbon B is applied activated carbon in which the peak in the differential pore distribution is positioned at the pore diameter of about 2.5 nm and whose pore volume is smaller than that of the activated carbon A, and to the activated carbon C is applied activated carbon in which the peak in the differential pore distribution is positioned at the pore having the diameter of about 2 nm and whose pore volume is smaller than those of the activated carbons A and B.
- 27. The canister according to claim 18, wherein to the activated carbon A is applied activated carbon in which a peak in the differential pore distribution is positioned at a pore diameter of about 2.5 nm and whose pore volume is large, to the activated carbon B is applied activated carbon in which the peak in the differential pore distribution is positioned at the pore diameter of about 2.5 nm and whose pore volume is smaller than that of the activated carbon A, and to the activated carbon C is applied activated carbon in which the peak in the differential pore distribution is positioned at the pore having the diameter of about 2 nm and whose pore volume is smaller than those of the activated carbons A and B.
- 428. The canister according to claim 316, wherein the volume of the third adsorbent layer is set in a range of from 2.3 to 4.8% of the volume of the total adsorbent layers.
- 29. The canister according to claim 17, wherein the volume of the third adsorbent layer is set in a range of from 2.3 to 4.8% of the volume of the total adsorbent layers.
- 30. The canister according to claim 18, wherein the volume of the third adsorbent layer is set in a range of from 2.3 to 4.8% of the volume of the total adsorbent layers.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-404629 |
Dec 2000 |
JP |
|
CROSS REFERENCE
[0001] This is a continuation in part application of U.S. application Ser. No. 10/012,705, filed Dec. 12, 2001, the subject matter of which is incorporated by reference herein.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10012705 |
Dec 2001 |
US |
Child |
10641297 |
Aug 2003 |
US |