Abstract: A fuel injection system for an engine having a cylinder, a piston in the cylinder, and an inlet port at the cylinder comprising a fuel inlet passage communicating with the inlet port and adapted to be connected to a fuel source and a fuel valve movable between an open position for allowing fuel to flow in the inlet passage and a closed position preventing fuel flow. The fuel valve is biased into one of the open or closed positions and a control system permits movement of the fuel valve to the open position at timed intervals to deliver metered volumes of fuel to the engine cylinder.

Abstract: An improved gas injection system for uniflow dual fuel engines having a plurality of cylinders, a piston in each cylinder, inlet ports arranged around each cylinder to be uncovered by downward movement of the piston in the cylinder is disclosed. It is comprised of a seal located in one inlet port and a reed valve assembly connected to the inlet port via the seal. An inlet pipe connected to the reed valve assembly is adapted to be connected at its distal end to a gas source. An air inlet pipe is connected between the port seal and the reed valve assembly for feeding air therebetween such that when the piston closes the one inlet port, air from the air inlet pipe will close the reed valve to prevent further flow of gas.

Abstract: A uniflow dual fuel engine including a plurality of cylinders, a piston in each cylinder, inlet ports arranged around each cylinder to be uncovered by downward movement of the piston in the cylinder. Air is forced into the cylinder through the inlet ports and there is a fuel injector to pump diesel fuel into the cylinder. There is an inlet pipe extending into one end of the port of each cylinder to end immediately adjacent the interior of the cylinder and connected at its distal end to a gas source.