Abstract: An internal combustion engine utilizing particulate fuel such as coal dust having a fuel delivery system wherein a mixing component is provided having a metering and a pressurized air duct assembly. During a compression stroke, this mixing component is moved into registry with an intake port and the particulate fuel within the metering duct is driven into the combustion chamber and a suspension thereof is formed within the chamber. A screw conveyor is utilized to transport the particulate fuel continuously between the metering duct and source.