Fuel supply device

A fuel supply device, comprising:

• a fuel tank for storing fuel, wherein the fuel comprises components with different octane numbers;
• a separator provided inside the fuel tank to separate the fuel into high-octane fuel that contains a greater amount of components with high octane numbers than the fuel and low-octane fuel that contains a greater amount of components with low octane numbers than the fuel;
• a high-octane fuel tank provided inside the fuel tank to store the high-octane fuel separated from the fuel by the separator;
• and
• a heat exchanger provided along an inner surface of a wall portion of the fuel tank to cause the low-octane fuel to exchange heat with the wall portion after the low-octane fuel has passed through the separator.

A fuel supply device, comprising:

• a fuel tank for storing fuel, wherein the fuel comprises components with different octane numbers;
• a separator provided inside the fuel tank to separate the fuel into high-octane fuel that contains a greater amount of components with high octane numbers than the fuel and low-octane fuel that contains a greater amount of components with low octane numbers than the fuel;
• and
• a high-octane fuel tank provided inside the fuel tank to store the high-octane fuel separated from the fuel by the separator, wherein:
• the fuel tank has a fuel tank opening extending through an upper wall portion of the fuel tank and a lid that openably closes the fuel tank opening;
• the high-octane fuel tank has a high-octane fuel tank opening extending through an upper wall portion of the high-octane fuel tank;
• and
• the high-octane fuel tank opening is located to align with the fuel tank opening and is openably closed by the lid.

A fuel supply device, comprising:

• a fuel tank for storing fuel, wherein the fuel comprises components with different octane numbers;
• a separator provided inside the fuel tank to separate the fuel into high-octane fuel that contains a greater amount of components with high octane numbers than the fuel and low-octane fuel that contains a greater amount of components with low octane numbers than the fuel;
• and
• a high-octane fuel tank provided inside the fuel tank to store the high-octane fuel separated from the fuel by the separator, wherein the high-octane fuel tank has a communication passage that connects a gas phase portion in an upper part of the high-octane fuel tank and a gas phase portion in an upper part of the fuel tank.