Multiple intensifier injectors with positive needle control and methods of injection

摘要: Multiple intensifier injectors with positive needle control and methods of injection that reduce injector energy consumption. The intensifiers are disposed about the axis injectors, leaving center free for direct down injector. Also disclosed is a boost system, increasing closing velocity but without adding mass to when finally closing. Direct allows maintaining pressure on fuel between events if system determines enough has been pressurized next injection, thus saving substantial operating an engine at less than maximum power, by not venting re-pressurizing every event.