| 摘要 |
PURPOSE:To improve the combustion efficiency and reduce the dimension and weight by increasing the supply pressure on the material air feeding side of an oxygen-rich membrane device and utilizing the intake pressure of an internal combustion engine for the suction pressure on the exit side of the oxygen-rich air of a gas selecting permeation membrane. CONSTITUTION:An oxygen-rich membrane device 20 for increasing the oxygen concentration in air and an air feeding device 22 for feeding air into the device 20 are provided, and the suction side conduit of the air feeding device 22 is connected to a conduit 11 on the downstream side of an air cleaner 10. Further, the conduit 11 on the downstream side of the air cleaner 10 is connected with an intake manifold 12 through a bypass pipe 13, and a control valve 14 is installed into said bypass pipe 13. The oxygen-rich air supplied from the oxygen- rich membrane device 22 is supplied into an engine 1 through a conduit 24 connected with the intake manifold 12. At this time, the air supply pressure in the air feeding device 22 is set over 2kg/cm<2>G. Further, the inside of the oxygen-rich membrane device 22 is filled with hollow string-shaped films.
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