Dual solenoid fuel injector with selectively actuable input and output valves

A fuel injector for an internal combustion engine comprising:

• a housing having an upper and a lower portion;
• an injector stem positioned inside the housing, wherein the injector stem comprises a lower portion and an upper portion;
• a first fluid chamber for receiving pressurized fuel at the lower portion of the injector stem;
• a second fluid chamber for receiving pressurized fuel at the upper portion of the injector stem;
• a seal positioned between the first fluid chamber and the second fluid chamber to separate the chambers;
• a fuel duct connected to the first fluid chamber;
• an input duct connected to the second fluid chamber for allowing fuel to fill the second fluid chamber;
• an output duct connected to the second fluid chamber for allowing fuel to drain from the second fluid chamber;
• a return spring attached to the injector stem, the return spring biasing the injector stem to a closed position;
• a first valve attached to the input duct, the first valve being selectively actuable to open and close the input duct;
• a second valve attached to the output duct, the second valve being selectively actuable to open and close the output duct to drain fuel from the second fluid chamber;
• a heating element positioned adjacent the first fluid chamber;
• and
• a controller connected to the heating element, the first valve, and the second valve for selective actuation of the heating element, the first valve, and the second valve.