Abstract: A combustion system for gas, non-dual-fuel engines utilizes a torch cell having a glow plug and a fuel injector. Pilot fuel is directed to the surface of the glow plug and main fuel is supplied to the torch cell. Reduced compression ratios are permitted, enabling use of low octane gaseous fuels and starting without assist from main chamber diesel operation.

Abstract: We provide a torch fuel cell for a dual gas-liquid fuel engine, the torch fuel cell being positioned internally of the variable volume chamber formed by the cylinder, piston and cylinder head which accepts and is adapted to compress the air/gas mixture forming the main fuel source. Preferably, the torch fuel cell is carried by the piston at, or adjacent to, the end face thereof. Suitable means are provided to deliver liquid fuel into an auto-ignition chamber in the fuel cell and other means for delivering the thermal and chemical products of such auto-ignition into the variable volume chamber to ignite the main gaseous fuel source.

Abstract: We provide a torch cell for a dual gas-liquid fuel engine, the torch cell has a torch cell nozzle at one end thereof and the other end having appropriate means to connect said torch cell to a fuel supply. A fuel injector is mounted in said torch cell at a predetermined angle to an axis of said torch cell. The torch cell has an auto-ignition chamber that is in operative communication with the injector by an injector nozzle passageway. The injector nozzle passageway enters the auto-ignition chamber at a predetermined angle relative to the cell axis. The torch cell provides an improved dual fuel engine and method for operating a dual fuel engine by use of its autoignition chamber. We also provide a cylinder head which can replace present dual fuel engine cylinder heads. Our cylinder head has at least one of our torch cells operatively connected to the cylinder head.

Abstract: We provide a torch cell for a dual gas-liquid fuel engine, the torch cell has a torch cell nozzle at one end thereof and the other end having appropriate means to connect said torch cell to a fuel supply. A fuel injector is mounted in said torch cell at a predetermined angle to an axis of said torch cell. The torch cell has an auto-ignition chamber that is in operative communication with the injector by an injector nozzle passageway. The injector nozzle passageway enters the auto-ignition chamber at a predetermined angle relative to the cell axis. The torch cell provides an improved dual fuel engine and method for operating a dual fuel engine by use of its autoignition chamber. We also provide a cylinder head which can replace present dual fuel engine cylinder heads. Our cylinder head has at least one of our torch cells operatively connected to the cylinder head.