Fuel tank system

A vehicle fuel tank system for a vehicle comprising:

• a fuel tank inner shell which accommodates fuel;
• a fuel tank outer shell disposed outside the inner shell, defining a space between the fuel tank outer shell and the fuel tank inner shell;
• flow means for causing coolant to flow through said space, said flow means comprising switching means for switching between one of a first coolant source, a second coolant source, a coolant inlet, and a coolant outlet;
• a fuel passage with an end provided in the fuel tank inner shell;
• a canister storing vapor flowing out of the fuel tank inner shell;
• a fuel filling pipe connected with the fuel tank inner shell for supplying fuel to the fuel tank inner shell from a source that is provided outside the vehicle;
• and
• a pump associated with the fuel passage for delivering the fuel from the inner shell to the vehicle engine;
• wherein the flow means includes a first communication member by which the space communicates with the canister, said first communication member being connected to said coolant outlet.

A fuel tank system for a vehicle comprising:

• a fuel tank inner shell which accommodates fuel;
• a fuel tank outer shell disposed outside the inner shell, defining a space between the fuel tank outer shell and the fuel tank inner shell;
• a heat insulation material provided on the fuel tank outer shell;
• flow means for causing a coolant to flow through the space to reduce a temperature of the fuel in the fuel tank inner shell, said flow means comprising a coolant inlet and a coolant outlet;
• a fuel passage with an end provided in the fuel tank inner shell;
• a canister storing vapor flowing out of the fuel tank inner shell;
• a fuel filling pipe connected with the fuel tank inner shell for supplying fuel to the fuel tank inner shell from a source that is provided outside the vehicle;
• a pump associated with the fuel passage for delivering the fuel from the inner shell to the vehicle engine;
• and
• a purge means for providing a purge flow of coolant through the space between the inner and outer fuel tank shells, and a bypass pipe and switching valve for providing a backup flow of coolant when the purge flow is stopped;
• wherein the flow means includes a first communication member by which the space communicates with the canister, said first communication member being connected to said coolant outlet.

A fuel tank system for a vehicle comprising:

• a fuel tank inner shell which accommodates fuel;
• a fuel tank outer shell disposed outside the inner shell, defining a space between the fuel tank outer shell and the fuel tank inner shell;
• flow means for causing a coolant to flow through the space to reduce a temperature of fuel in the fuel tank inner shell, said flow means comprising a coolant inlet and a coolant outlet;
• a fuel passage with an end provided in the fuel tank inner shell;
• a canister storing vapor flowing out of the fuel tank inner shell;
• a fuel filling pipe connected with the fuel tank inner shell for supplying fuel to the fuel tank inner shell from a source that is provided outside the vehicle;
• and
• a pump associated with the fuel passage for delivering the fuel from the inner shell to the vehicle engine;
• wherein the flow means includes a first communication member by which the space communicates with the canister, said first communication member being connected to said coolant outlet, wherein the flow means includes a second communication member by which the canister communicates with the space through an air cleaner, and wherein said second communication member is connected to said coolant inlet.

The A fuel tank system for a vehicle comprising:

• a fuel tank inner shell which accommodates fuel;
• a fuel tank outer shell disposed outside the inner shell, defining a space between the fuel tank outer shell and the fuel tank inner shell;
• a heat insulation material provided on the fuel tank outer shell;
• flow means for causing a coolant to flow through the space to reduce a temperature of the fuel in the fuel tank inner shell, said flow means comprising a coolant inlet and a coolant outlet;
• a fuel passage with an end provided in the fuel tank inner shell;
• a canister storing vapor flowing out of the fuel tank inner shell;
• a fuel filling pipe connected with the fuel tank inner shell for supplying fuel to the fuel tank inner shell from a source that is provided outside the vehicle;
• a pump associated with the fuel passage for delivering the fuel from the inner shell to the vehicle engine;
• and
• a feed-oil vapor line which supplies fuel vapor in the fuel tank inner shell to the canister, and an electromagnetic valve disposed on said feed-oil vapor line, said electromagnetic valve opening when the fuel is supplied to the fuel tank inner shell;
• wherein the flow means includes a first communication member by which the space communicates with the canister, said first communication member being connected to said coolant outlet.