Fuel-sorbing device using layered porous silica
AssigneeKabushiki Kaisha Toyota Chuo Kenkyusho
InventorsShinji Inagaki, Yoshiaki Fukushima, Takashi Ohta, Akane Okada
Life of this patent
Estimating the term…
Abstract
A fuel-sorbing device excellent in sorbing evaporated fuel includes a sorbent of layered porous silica for capturing evaporated fuel and a container which houses the sorbent and into which the evaporated fuel is introduced. The layered porous silica is composed of a plurality of superposed sheets made of a framework of SiO.sub.2. Adjacent sheets are partly bonded each other to form a three-dimensional framework having a large number of pores. The sorbent can be used in combination with an organic polymer sorbent, so as to sorb evaporated fuel in two stages.
Claims14
A fuel-sorbing device comprising a sorbent for capturing evaporated fuel and a container having a chamber charged with the sorbent, the chamber having an inlet for receiving the evaporated fuel and transporting it to the sorbent and an outlet in fluid communication with the atmosphere, said sorbent including layered porous silica having a hydrophobic surface and formed of a plurality of layered adjacent silica sheets, the sheets having a repetitively bent surface and portions of adjacent sheets bent towards an adjacent sheet being bonded by a siloxane bond (Si--O--Si) formed from the condensation of silanol groups (SiOH) of adjacent sheets and portions bent away from an adjacent sheet defining pores between the sheets to form a three-dimensional framework with a honeycomb cross-section.
A fuel-sorbing device including sorbents for capturing evaporated fuel, comprising:
- a container for housing the sorbents and into which the evaporated fuel is introduced, said container including a first chamber charged with a sorbent other than layered porous silica and a second chamber charged with layered porous silica, the first chamber having an inlet through which fuel is introduced and an outlet to the second chamber, the second chamber having an outlet in communication with the atmosphere, said sorbent other than layered porous silica being capable of being swollen by the evaporated fuel, the layered porous silica having a hydrophobic surface and being formed of adjacent sheets having a repetitively bent surface with portions bent toward an adjacent sheet being bonded by a siloxane bond (Si--O--Si) formed from the condensation of silanol groups (SiOH) of adjacent sheets and portions bent away from an adjacent sheet defining pores between the sheets to form a three dimensional framework having a honeycomb cross section and said first and second chambers being so constituted that the evaporated fuel is introduced into said second chamber after having passed through said first chamber.
Dependencies are inferred from the claim text.