Filter arrangement for a tank ventilation system of a fuel tank
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorAndreas Menke
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Abstract
A tank ventilation system of a fuel tank (2) has at least one housing (20) with a tank-side fuel vapor inlet opening (22), an engine-side fuel vapor outlet opening (26) and an atmosphere opening (24). The housing (20) has at least one first adsorption region (32) and a second adsorption region (34) upstream of the fuel vapor outlet opening (26). The second adsorption region (32) has a substantially lower absorption capacity than the first adsorption region (32), which is placed in a direction of flow toward the atmosphere opening (24).
Claims17
A filter arrangement for a tank ventilation system of a fuel tank, comprising at least one housing with at least a tank-side fuel vapor inlet opening, an engine-side fuel vapor outlet opening and an atmosphere opening, the filter arrangement having at least one first adsorption region and at least a second adsorption region upstream of the fuel vapor outlet opening, said second adsorption region having a substantially lower absorption capacity than the first adsorption region which is placed in a direction of flow toward the atmosphere opening.
A tank ventilation system for use with a fuel tank and an internal combustion engine, comprising:
- a housing with opposite first and second ends;
- a fuel vapor inlet opening communicating with the fuel tank;
- an atmosphere opening communicating with atmosphere surrounding the tank ventilation system;
- a fuel vapor outlet opening communicating with the internal combustion engine;
- a first adsorption region defined in the housing and having a first adsorbent therein;
- and a second adsorption region defined in the housing between the first adsorption region and the fuel vapor outlet opening and having a second adsorbent therein, the second adsorption region having a substantially lower absorption capacity than the first adsorption region.
Dependencies are inferred from the claim text.