Internal combustion engine system

Abstract

Provided is an internal combustion engine system ( 1 ) capable of obtaining sufficient quantity of ethanol by separating a gasoline-ethanol composite fuel to gasoline and ethanol without being affected by components of gasoline. The internal combustion engine system ( 1 ) includes a composite fuel storing tank ( 2 ), a separation membrane ( 3 ) configured to separate a composite fuel to a gasoline component and an ethanol component, and a supplying unit ( 9 ) configured to supply the gasoline component and the ethanol component to an internal combustion engine respectively according to operation conditions. The separation membrane ( 3 ) is prepared to permeate aromatic hydrocarbons together with ethanol.

1 . An internal combustion engine system comprising:
 a composite fuel storing tank configured to store a composite fuel of gasoline and ethanol;   a separation membrane configured to separate the composite fuel stored in the composite fuel storing tank to a gasoline component and an ethanol component; and   a supplying unit configured to supply the gasoline component and the ethanol component separated by the separation membrane to an internal combustion engine according to operation conditions, respectively;   wherein the separation membrane is prepared to permeate aromatic hydrocarbons together with ethanol.   
     
     
         2 . The internal combustion engine system according to  claim 1 , wherein the supplying unit is configured to supply the ethanol component and the aromatic hydrocarbons separated by the separation membrane concurrently to an internal combustion engine according to the operation conditions.