Exhaust suppression device for vaporized fuel

Abstract

Abstract PURPOSE:To enhance the safety by furnishing a selective permeating film, which allows permeation of oxygen but of no nitrogen, at the external surface of a fuel seizing cylinder in a canister, providing said film on its inside with a porous layer holding a fuel adsorptive agent, and thereby making inside the fuel tank inert. CONSTITUTION:One of the end openings 3 of a canister 2 is put in communication with the upper part of a fuel tank 1 and the other opening 4 released open to the atmosphere via a check valve 7, while the side opening 5 is put in communication with the suction system of engine via another check valve 8. A fuel seizing cylinder 14 in the canister 2 consists mainly of a porous layer 15 containing a fuel adsorptive agent 17, and the outside surface is coated with a selective permeating film 18, which allows permeation of oxygen but not of nitrogen. Accordingly the nitrogen is condensed by and by in said cylinder 14 and then dispersed within the tank 1, so that inside the tank 1 is made inert to suppress likelihood of fire generation from the tank l even in the event of eventual accident.

Inventors

• 👤 Toshikuni Miyazaki
• 👤 宮崎　利邦
• 👤 Taro Tanaka
• 👤 太郎 田中

Bibliographic Details