Techniques for managing a fuel for a power generator include storing a volume of a fuel in a primary fuel storage tank that includes an inlet and an outlet; generating electrical power with a solar power assembly; operating a pump assembly with the generated electrical power to circulate a flow of the fuel from the primary fuel storage tank to a fuel filter; removing at least a portion of contaminants from the flow of the fuel; circulating the flow of the fuel to a fuel quality sensor; measuring a quality value of the flow of the fuel; and based on a signal from the fuel quality sensor associated with the quality value of the flow of the fuel, operating a control valve to direct the flow of the fuel from the fuel quality sensor to the primary fuel storage tank from the control valve or an auxiliary fuel storage tank from the control valve.

Fuel isolation systems, apparatuses and methods are described. In some embodiments, a system comprises a fuel tank, a fuel pump, an engine, a firewall, a fuel line from the fuel tank to the engine, a connector coupled inline with the fuel line on a cold side of the fuel line, a valve coupled to the connector, a fluid feed line coupled to a fluid source and to the valve. In the event of an engine fire condition, a control unit outputs signaling to turn off the fuel pump and operate the valve to introduce fluid from the fluid source into the fuel line. The introduced fluid provides a siphon break in the fuel line such that the only fuel that can pass the firewall is the remaining fuel in the fuel line downstream of the connector and the introduced fluid.

Fuel management system for enhanced operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder. It is preferred that the direct injection occur after the inlet valve is closed. It is also preferred that stoichiometric operation with a three way catalyst be used to minimize emissions. In addition, it is also preferred that the anti-knock agents have a heat of vaporization per unit of combustion energy that is at least three times that of gasoline.

Fuel management system for enhanced operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder. It is preferred that the direct injection occur after the inlet valve is closed. It is also preferred that stoichiometric operation with a three way catalyst be used to minimize emissions. In addition, it is also preferred that the anti-knock agents have a heat of vaporization per unit of combustion energy that is at least three times that of gasoline.

An improved ball valve for use between dual fuel tanks having a non-circular outlet aperture leading to the fuel line and engine that can allow fuel to pass therethrough even when the ball contained within the valve rests in the opening of the outlet aperture.

Fuel isolation systems, apparatuses and methods are described. In some embodiments, a system comprises a fuel tank, a fuel pump, an engine, a firewall, a fuel line from the fuel tank to the engine, a connector coupled inline with the fuel line on a cold side of the fuel line, a valve coupled to the connector, an air feed line coupled to an air source and to the valve. In the event of an engine fire condition, a control unit outputs signaling to turn off the fuel pump and operate the valve to introduce air from the air source into the fuel line. The introduced air provides a siphon break in the fuel line such that the only fuel that can pass the firewall is the remaining fuel in the fuel line downstream of the connector and the introduced air.

A fuel system for a generating unit disposed within an enclosure, the enclosure having an enclosure width and an enclosure height, includes a bulk fuel storage tank and a vertical day tank, a supply line and a return line. The vertical day tank has a tank width corresponding to the enclosure width, a tank height corresponding to the enclosure height, and a tank depth selected to provide an interior volume to meet fuel capacity requirements for the generating unit. The tank height and tank width both exceed the tank depth. The vertical day tank further has a fill port and an overfill port located at a top of the vertical day tank. The supply line runs from the bulk fuel tank to the fill port of the vertical day tank, and the return line runs from the overfill port of the vertical day tank to the bulk fuel storage tank.

An engine operable in a premixed combustion system and a diffusion combustion system. The engine includes a main fuel injection valve, a pilot fuel injection valve, a liquid fuel tank, a main fuel supply path, a pilot fuel supply path, a pilot fuel filter, a pilot fuel high-pressure pump, a pilot fuel tank, and a pilot fuel supply pump. The pilot fuel tank stores pilot fuel sent from the pilot fuel high-pressure pump and not injected by the pilot fuel injection valve. This pilot fuel is sent to an automatic backwash filter and a pilot fuel filter while not passing through the liquid fuel tank.

A fuel supply system for an aerial vehicle includes: a plurality of fixed tanks storing fuel; a variable tank provided in a fixed tank of the plurality of fixed tanks and storing fuel; a fuel supply flow path, a first end of which is connected to the variable tank and passing through the plurality of fixed tanks; and a fuel pump provided in a fixed tank which does not have the variable tank, an outlet side of the fuel pump being connected to the fuel supply flow path. According to the fuel supply system, continuous fuel supply is performed despite the change of the attitude or acceleration of an aerial vehicle, sufficient fuel is stored, and constraints on fuel tank design are minimized.

A fuel separation system includes a fuel separator configured to receive a fuel stream and separate the fuel stream, based on a volatility of the fuel stream, into a vapor stream defined by a first auto-ignition characteristic value and a first liquid stream defined by a second auto-ignition characteristic value, the second auto-ignition characteristic value greater than the first auto-ignition characteristic value; and a heat exchanger fluidly coupled between a fuel input of the fuel stream and the fuel separator, the heat exchanger configured to transfer heat from the vapor stream to the fuel stream, and output a heated fuel stream to the fuel separator and a second liquid stream defined by the first auto-ignition characteristic value.