Abstract: An engine having cylinders capable of combusting gaseous fuel includes at least one spark plug per cylinder, a gaseous fuel injector extending into each cylinder and having at least one nozzle cluster containing a one or more nozzles positioned to direct gaseous fuel only toward a spark gap of an associated spark plug, and a control system operating each spark plug and each injector to deliver gaseous fuel directly to the cylinder and initiate combustion. A method for controlling an engine capable of operating with gaseous fuel includes injecting the gaseous fuel directly into each cylinder through a centrally located injector having a plurality of clusters of nozzles, each cluster associated with one of at least two spark plugs positioned closer to a cylinder wall than to the injector, each cluster directing the gaseous fuel toward an associated spark plug gap.

Abstract: An engine having cylinders capable of combusting gaseous fuel includes at least one spark plug per cylinder, a gaseous fuel injector extending into each cylinder and having at least one nozzle cluster containing a one or more nozzles positioned to direct gaseous fuel only toward a spark gap of an associated spark plug, and a control system operating each spark plug and each injector to deliver gaseous fuel directly to the cylinder and initiate combustion. A method for controlling an engine capable of operating with gaseous fuel includes injecting the gaseous fuel directly into each cylinder through a centrally located injector having a plurality of clusters of nozzles, each cluster associated with one of at least two spark plugs positioned closer to a cylinder wall than to the injector, each cluster directing the gaseous fuel toward an associated spark plug gap.