Self-injection system
OwnerMarius A. Paul, Ana Paulinventors
Life of this patent
Estimating the term…
Abstract
A fuel injection system for an engine having a combustion chamber, the fuel injection system in a preferred embodiment having a hydraulic actuator module with a hydraulic actuating fluid for activating a fuel injection piston with fluid in an actuating chamber of an injector defined in part by a large head, amplifying piston connected to the fuel injection piston the actuating fluid communicating with a hydraulic pulse pump driven by the pressure in the combustion chamber, the injector including a sub-module to provide a multi-pulse discharge to fuel and a discharge nozzle having an orifice with a poppet valve having a structure to provide a pulsed, conical, swirling spray of fuel.
Claims15
A fuel injection system for an engine having a combustion chamber, the injector system comprising:
- 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 defining a hydraulic actuating chamber, the enlarged-head amplifying piston having a diameter substantially greater than the injector piston;
- a hydraulic actuating module having a supply of hydraulic fluid with a hydraulic fluid feed conduit connected between the fluid supply and the hydraulic actuating chamber;
- activable valve means between the hydraulic fluid feed conduit and the actuating cylinder for selectively communicating the actuating chamber with the feed conduit, wherein the activatable valve means includes an electronically controlled slide valve with control mean, 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 pressure;
- wherein the electronically controlled slide valve has positioning means for maintaining the slide valve in an open position when the pressure of hydraulic fluid in the actuating chamber is greater than the pressure of hydraulic fluid in the feed conduit, wherein the pressurized fluid in the actuating chamber returns energy to the fluid supply;
- 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.
In a fuel injector having a fuel input conduit connectable to a high pressure fuel supply, a nozzle having a fuel discharge conduit, a discharge orifice for discharging fuel from the injector, and, a fuel pulse control means for controlling delivery of a pulse of high pressure fuel from the fuel supply to the nozzle, the improvement comprising:
- a self-activated, multi-pulse module in the fuel injector between the fuel input conduit and the fuel discharge conduit, the module having a first and second cross passageways connecting the fuel input conduit and the fuel discharge conduit, the valve plunger having first and second cutaway portions selectively alignable with the first and second cross passageways on displacement of the valve plunger in the valve cylinder,
- a compression spring in the valve cylinder in contact with the valve plunger biasing the valve plunger to a first position wherein the first cutaway portion is aligned with the first cross passageway, wherein pressurized fuel flowing through the first passageway displaces the valve plunger against the compression spring aligning the second cross passageway with the second cutaway portion and blocking flow through the first cross passageway.
In a fuel injector having a fuel input conduit connectable to a high pressure fuel supply, a nozzle having a fuel discharge conduit, a discharge orifice for discharging fuel from the injector, and, a fuel pulse control means for controlling delivery of a pulse of high pressure fuel from the fuel supply to the nozzle, the improvement comprising:
- a poppet valve controlling discharge of fuel in the fuel discharge conduit to the discharge orifice, the poppet valve having a conical head with a conical seating shoulder and the discharge orifice having a conical poppet seat downstream of said discharge orifice, wherein the conical shoulder has an angle and the conical seat has an angle, and the angle of the conical shoulder matches the angle of the conical seat and, guide means in the discharge conduit of the nozzle for imparting a rotary motion to fuel discharged from the discharge orifice, wherein on displacement of the conical head from the conical seat, a uniform flared gap is formed that generates a conical spray from the discharge orifice that is imparted a rotary motion by the guide means.
Dependencies are inferred from the claim text.