Abstract: A fuel separation device is configured to separate the first fuel from the mixed fuel to have a concentration of the high-octane fuel not more than a prescribed upper limit value. The prescribed upper limit is defined that a consumed amount of the high-octane fuel measured under a condition that the internal combustion engine is operated at an operation mode including a state in which a fuel injection amount from a first fuel injection valve for the first fuel is equal to a lower injection amount limit by using the first fuel and the second fuel separated by the fuel separation device is less than a consumed amount of the high-octane fuel measured under at the above operation mode by using the first fuel and the second fuel having the concentration of the high-octane fuel at 100% and 0%, respectively, by a prescribed amount or more.

Abstract: A fuel separation device is configured to separate the first fuel from the mixed fuel to have a concentration of the high-octane fuel not more than a prescribed upper limit value. The prescribed upper limit is defined that a consumed amount of the high-octane fuel measured under a condition that the internal combustion engine is operated at an operation mode including a state in which a fuel injection amount from a first fuel injection valve for the first fuel is equal to a lower injection amount limit by using the first fuel and the second fuel separated by the fuel separation device is less than a consumed amount of the high-octane fuel measured under at the above operation mode by using the first fuel and the second fuel having the concentration of the high-octane fuel at 100% and 0%, respectively, by a prescribed amount or more.

Abstract: A system for separating an ethanol-gasoline blended fuel into gasoline and ethanol-water mixture by mixing water therewith with a lightweight, compact and simple configuration is provided. The system includes a fuel tank for storing a blended fuel; pump means for sucking the blended fuel in the fuel tank, separating the blended fuel into gasoline and ethanol-water mixture by mixing water therewith, and pressure-feeding the separated gasoline and ethanol-water mixture; a separation tank provided inside the fuel tank, and storing the gasoline and the ethanol-water mixture pressure-fed by the pump means in a state separated from each other and in a pressurized state; gasoline drawing means for drawing the gasoline stored in the separation tank via a first on-off valve; and ethanol drawing means for drawing the ethanol-water mixture stored in the separation tank via a second on-off valve.

Abstract: A fuel separation device is configured to separate the first fuel from the mixed fuel to have a concentration of the high-octane fuel not more than a prescribed upper limit value. The prescribed upper limit is defined that a consumed amount of the high-octane fuel measured under a condition that the internal combustion engine is operated at an operation mode including a state in which a fuel injection amount from a first fuel injection valve for the first fuel is equal to a lower injection amount limit by using the first fuel and the second fuel separated by the fuel separation device is less than a consumed amount of the high-octane fuel measured under at the above operation mode by using the first fuel and the second fuel having the concentration of the high-octane fuel at 100% and 0%, respectively, by a prescribed amount or more.

Abstract: Provided is an internal combustion engine which uses gasoline and alcohol as a fuel and can yield sufficient output even though the alcohol is injected into an intake port. The internal combustion engine (1) includes a first fuel injection unit (6) configured to inject gasoline into an intake port (4) or inject gasoline directly into a combustion chamber (2) and a second fuel injection unit (8) configured to inject alcohol into the intake port (4). The alcohol flows into the combustion chamber (2) after being injected directly onto a wall surface of an intake valve (4a) or a wall surface of the intake port (4) in liquid state by the second fuel injection unit (8).

Abstract: This present invention provides a gasoline-ethanol separation apparatus which is used for an internal combustion engine, and can separate a mixture fuel formed of mixed gasoline and ethanol into gasoline and ethanol. The gasoline-ethanol separation apparatus 1 includes a fuel tank 2 for accommodating a mixture fuel, a separation tank 4 for separating the mixture fuel supplied from the fuel tank 2 into the gasoline (A) and an ethanol-water mixture liquid (B), by mixing water supplied by water-supply means 3 with the mixture fuel, and storing the separated mixture liquid (B); pressurizing means 5 for pressurizing the mixture liquid (B) to be supplied into the separation tank 4; gasoline-taking-out means 6 for taking the gasoline (A) out of the tank from an upper part of the interface between the gasoline (A) and the ethanol-water mixture liquid (B) first valve 62; and ethanol-taking-out means 7 for taking the ethanol-water mixture liquid (B) out of the separation tank 4 through a second valve 72.

Abstract: A system for separating an ethanol-gasoline blended fuel into gasoline and ethanol-water mixture by mixing water therewith with a lightweight, compact and simple configuration is provided. The system includes a fuel tank for storing a blended fuel; pump means for sucking the blended fuel in the fuel tank, separating the blended fuel into gasoline and ethanol-water mixture by mixing water therewith, and pressure-feeding the separated gasoline and ethanol-water mixture; a separation tank provided inside the fuel tank, and storing the gasoline and the ethanol-water mixture pressure-fed by the pump means in a state separated from each other and in a pressurized state; gasoline drawing means for drawing the gasoline stored in the separation tank via a first on-off valve; and ethanol drawing means for drawing the ethanol-water mixture stored in the separation tank via a second on-off valve.

Abstract: This present invention provides a gasoline-ethanol separation apparatus which is used for an internal combustion engine, has a simple structure, and can separate a mixture fuel formed of mixed gasoline and ethanol into gasoline and ethanol.