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 control system communicably coupled to the fuel separator and operable to receive an input from an engine, the input including an engine operating condition, the control system configured to adjust an operating parameter of the fuel separator, based at least in part on the engine operating condition, to vary at least one of the first or second auto-ignition characteristic values.

An onboard, in-line fuel cooling system for a motor vehicle includes a chiller adapted to be powered by an onboard direct-current electric power source such as, for example, a motor vehicle power system or an auxiliary battery, and a fuel conduit adapted to form at least a portion of a fuel supply line between an onboard fuel tank and an onboard engine of the motor vehicle. The fuel conduit is in thermal communication with the chiller to cool fuel passing through the fuel conduit from the onboard fuel tank to the onboard engine. Thus, the engine is provided with fuel at a temperature lower than the temperature of the fuel in the fuel tank. The chiller can be a vapor-compression refrigeration system, a thermo-electric cooler, or any other suitable type of chiller powered by the onboard direct-current electric power source.

An onboard, in-line fuel cooling system for a motor vehicle includes a chiller adapted to be powered by an onboard direct-current electric power source such as, for example, a motor vehicle power system or an auxiliary battery, and a fuel conduit adapted to form at least a portion of a fuel supply line between an onboard fuel tank and an onboard engine of the motor vehicle. The fuel conduit is in thermal communication with the chiller to cool fuel passing through the fuel conduit from the onboard fuel tank to the onboard engine. Thus, the engine is provided with fuel at a temperature lower than the temperature of the fuel in the fuel tank. The chiller can be a vapor-compression refrigeration system, a thermo-electric cooler, or any other suitable type of chiller powered by the onboard direct-current electric power source.

A fuel return device includes a fuel collector and a return system. The fuel collector is located in a passage between a fuel tank and a vapor fuel processing device that processes vapor fuel discharged from the fuel tank. The fuel collector collects the fuel and stores the collected fuel as a storage fuel. The return system extends from the fuel collector, and is connected to a low-pressure generation part that generates a low pressure by a flow of fuel refueled through a filler pipe into the fuel tank, to return the storage fuel to the fuel tank.

A fuel return device includes a fuel collector and a return system. The fuel collector is located in a passage between a fuel tank and a vapor fuel processing device that processes vapor fuel discharged from the fuel tank. The fuel collector collects the fuel and stores the collected fuel as a storage fuel. The return system extends from the fuel collector, and is connected to a low-pressure generation part that generates a low pressure by a flow of fuel refueled through a filler pipe into the fuel tank, to return the storage fuel to the fuel tank.

A fuel treatment module treats fuel with infrared radiation from a plurality of infrared radiation emitting elements arranged in a structure configured to ensure sufficient exposure of the fuel to infrared radiation. Such structure includes a head cap and spacer having through bores providing a manifold through which fuel flows into multiple IR/shunt columns of infrared radiation emitting elements that are disposed within a canister. Then the fuel moves out of the multiple IR/shunt columns into the open area of the canister where the fuel then flows around the exterior of the columns, exposing the fuel to further infrared radiation treatment.

A fuel treatment module treats fuel with infrared radiation from a plurality of infrared radiation emitting elements arranged in a structure configured to ensure sufficient exposure of the fuel to infrared radiation. Such structure includes a head cap and spacer having through bores providing a manifold through which fuel flows into multiple IR/shunt columns of infrared radiation emitting elements that are disposed within a canister. Then the fuel moves out of the multiple IR/shunt columns into the open area of the canister where the fuel then flows around the exterior of the columns, exposing the fuel to further infrared radiation treatment.

A fuel tank arrangement for a dual fuel internal combustion engine includes a fuel tank arranged to supply liquid fuel to the dual fuel internal combustion engine, wherein the fuel tank arrangement includes a return conduit connected to the fuel tank and configured to supply leaked fuel from the dual fuel internal combustion engine to the fuel tank, wherein the fuel tank arrangement includes a first fuel separation arrangement positioned in fluid communication between the fuel tank and an outlet to an ambient environment thereof.

A fuel tank arrangement for a dual fuel internal combustion engine includes a fuel tank arranged to supply liquid fuel to the dual fuel internal combustion engine, wherein the fuel tank arrangement includes a return conduit connected to the fuel tank and configured to supply leaked fuel from the dual fuel internal combustion engine to the fuel tank, wherein the fuel tank arrangement includes a first fuel separation arrangement positioned in fluid communication between the fuel tank and an outlet to an ambient environment thereof.

A method for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger and sticking of the tank vent valve being detected when the absolute value of a correlation of a calculated tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value.