Liquefied light hydrocarbon fuel system for hybrid vehicle and methods thereto

A liquefied light hydrocarbon fuel system for a hybrid vehicle, comprising:

• a) a fuel tank having a buffer space configured to provide room for vaporized light hydrocarbon fuel;
• b) insulation, wherein the insulation is disposed around the fuel tank;
• c) a first fuel line having a first end and a second end, wherein the first end of the first fuel line extends into the buffer space of the fuel tank;
• d) a pressure sensor measuring pressure in the fuel tank and sending digital signals corresponding to pressure to a digital control unit through a first signal bus, wherein the pressure sensor is disposed within the first fuel line;
• e) a safety relief valve, wherein an inlet to the safety relief valve connects to the first fuel line through a shut-off valve;
• f) a second fuel line having a first end and a second end, wherein the first end of the second fuel line connects to the second end of the first fuel line through the shut-off valve;
• g) a fuel control valve, wherein an inlet of the fuel control valve connects to the second end of the second fuel line and wherein an outlet of the fuel control valve is adapted to connect to a fuel inlet of an internal combustion engine of the-hybrid vehicle whereby the fuel control valve is configured to regulate the flow of vaporized fuel into the internal combustion engine;
• and
• h) a tank heating system, further comprising:
• i. a heating element, wherein the heating element is disposed adjacent to or within the fuel tank whereby the heating element produces heat to vaporize liquefied light hydrocarbon fuel and increase the fuel tank pressure;
• ii. a heating power control system connected to the heating element and connected through a direct current power line to an electrical energy storage system of the hybrid vehicle whereby the heating power control system draws electrical energy from the electrical energy storage system through the direct current power line and controls the amount of heat produced by the heating element.