| 摘要 |
A canister for an evaporative emission system for use in motor vehicle comprises a hollow body having a first extremity provided with an inlet port and a second extremity provided with an outlet port. The line joining the inlet port to the outlet port defines a direct route inlet-outlet which is naturally followed by the vapors entering through the inlet port and exiting through the outlet port. The canister comprises, inside the hollow body, at least one layer of absorbent material as well as one distribution mean positioned between the absorbent material and the inlet port. The distribution mean forces the vapors entering the canister through the inlet port to spread radially relative to the direct route inlet-outlet for a better usage of the absorbent material. The distribution mean comprises an inlet screen of foam extending throughout the cross section of the hollow body. The inlet screen has an inlet area facing the inlet port and a peripheral area surrounding the inlet area. The thickness and the density of the foam in the inlet area, with regards to the thickness and density of the foam in the peripheral area, is configured such that the vapors entering the canister go more easily through the peripheral area than through the inlet area.
|
