Fuel supply system for an engine with an electric ignition power source

An engine, comprising:

• a block defining a cylinder bore therethrough;
• a piston disposed within the cylinder bore and configured for reciprocating motion relative to the cylinder bore, the cylinder bore and the piston at least partly defining a main combustion chamber;
• an oxidizer intake conduit disposed in selective fluid communication with the main combustion chamber via an intake valve;
• an intake fuel injector having at least one outlet orifice disposed in fluid communication with the main combustion chamber via the oxidizer intake conduit;
• a direct fuel injector having at least one outlet orifice disposed in direct fluid communication with the main combustion chamber along a flow path that does not include the oxidizer intake conduit;
• a storage tank, a wall of the storage tank defining a first aperture and a second aperture therethrough, the first aperture being distinct from the second aperture,
• the first aperture of the storage tank being fluidly coupled to an inlet of the intake fuel injector via a pressure control module,
• the pressure control module being configured to maintain a pressure at the inlet of the intake fuel injector within a pressure range that includes a pressure value that is less than a pressure inside the storage tank;
• and
• a pump fluidly coupled with the second aperture of the storage tank, an inlet of the direct fuel injector being fluidly coupled to an outlet of the pump, the pump being configured to maintain a pressure at the inlet of the direct fuel injector that is greater than the pressure at the inlet of the intake fuel injector.

A method for supplying a fuel to an engine, the method comprising:

• drawing a first flow of the fuel from a storage tank, the first flow of the fuel leaving the storage tank in a gaseous state;
• delivering the first flow of the fuel from the storage tank to a first fuel injector via a pressure control module;
• decreasing a pressure of the first flow of the fuel to less than a pressure inside the storage tank via the pressure control module;
• injecting the first flow of the fuel into a main combustion chamber of the engine via an oxidizer intake conduit of the engine;
• drawing a second flow of the fuel from the storage tank, the second flow of the fuel leaving the storage tank in a liquid state, the gaseous state of the fuel coexisting with the liquid state of the fuel within the storage tank;
• pumping the second flow of the fuel to a pressure that is higher than a pressure inside the storage tank;
• delivering the second flow of the fuel to a second fuel injector at a pressure that is higher than the pressure of the first flow of the fuel within the first fuel injector;
• and
• injecting the second flow of the fuel directly into the main combustion chamber of the engine via the second fuel injector.