Self injection system

In a fuel injection system on an engine having a combustion chamber, the injector system having a fuel injector with a fuel injection cylinder and a hydraulic actuating cylinder, the injector having an injector piston slidable in the injection cylinder with an enlarged-head, amplifying piston slidable in the hydraulic actuating cylinder, the hydraulic actuating cylinder and amplifying piston forming a hydraulic actuating chamber, the enlarged-head amplifying piston having a diameter substantially greater than the injector piston, wherein the improvement comprises:

• a hydraulic actuating network having a supply of hydraulic fluid with a hydraulic fluid feed conduit connected between the fluid supply and the hydraulic actuating cylinder, the fluid feed conduit having a check valve to prevent back flow of hydraulic fluid to the supply;
• activatable valve means between the check valve and the actuating cylinder for selectively communicating the actuating chamber with the feed conduit, wherein activatable valve means includes an electronically controlled slide valve with control means, having processing means for processing cycle time and hydraulic pressure in the feed conduit, for selectively activating the valve and communicating the hydraulic fluid in the feed conduit with the actuating chamber at optimal cycle time and cycle pressure;
• and
• a hydraulic pulse pump having a pump cylinder with a slide piston dividing the pump cylinder into a first chamber having a passage in communication with the fluid feed conduit and a second chamber having a passage in communication with the combustion chamber wherein during operation the pressure of compression and combustion gases is transmitted to the hydraulic fluid by the hydraulic pulse pump.