Integrated fuel injector igniters having force generating assemblies for injecting and igniting fuel and associated methods of use and manufacture
View Patent ↗Embodiments of injectors configured for adaptively injecting and igniting various fuels in a combustion chamber are disclosed herein. An injector according to one embodiment includes an end portion configured to be positioned adjacent to a combustion chamber, and an ignition feature carried by the end portion and configured to generate an ignition event. The injector also includes a force generator assembly and a movable valve. The force generator assembly includes a first force generator separate from a second force generator. The first force generator creates a motive force to move the valve between the closed and open positions into the combustion chamber. The second force generator is electrically coupled to the ignition feature and provides voltage to the ignition feature to at least partially generate the ignition event.
1. An injector igniter for replacing a diesel fuel injector in an internal combustion engine, the injector igniter comprising:
a valve movable between a closed position and an open position to introduce fuel into a combustion chamber of the internal combustion engine;
an ignition feature positioned to generate an ignition event;
a valve driver movable between a first position and a second position;
a first solenoid winding configured to generate a magnetic field, wherein the magnetic field moves the valve driver from the first position to the second position to move the valve from the closed position to the open position; and
a second solenoid winding, separate from the first solenoid winding, wherein the second solenoid winding is electrically coupled to the ignition feature,
wherein the magnetic field generates ignition energy in the second solenoid winding, and wherein the second solenoid winding supplies the ignition energy to the ignition feature to generate the ignition event.
2. The injector igniter of claim 1 wherein the first solenoid winding includes a first number of windings and the second solenoid winding includes a second number of windings, wherein the second number of windings is at least five times greater than the first number of windings, and wherein the ignition event includes the generation of a plasma.
3. The injector igniter of claim 1 wherein the first solenoid winding includes a first conductor having a first diameter, wherein the second solenoid winding includes a second conductor having a second diameter, and wherein the first diameter is at least five times greater than the second diameter.
4. The injector igniter of claim 1 , further comprising a voltage supply conductor electrically coupled to the ignition feature, wherein the voltage supply conductor and the second solenoid winding supply ignition energy to the ignition feature to generate the ignition event.
5. The injector igniter of claim 1 , further comprising a capacitor electrically coupled to the ignition feature, wherein the capacitor and the second solenoid winding supply ignition energy to the ignition feature to generate the ignition event.
6. The injector igniter of claim 1 wherein the valve is a first valve, wherein the injector igniter further includes a second valve, the second valve comprising a radially expandable flow valve, wherein operation of the first valve to the open position directs the fuel towards the second valve, and wherein fuel pressure deforms the second valve to an open position to introduce the fuel into the combustion chamber.
7. The injector igniter of claim 1 , further comprising:
an ignition conductor, wherein the ignition conductor electrically couples the second solenoid winding to the ignition feature; and
a core insulator coaxially disposed over the ignition conductor.
8. An injector igniter comprising:
an injector body positionable at least partially within an injector port in an internal combustion engine;
a valve positioned at least partially within the injector body and operable between a closed position and an open position;
an electrode positioned to produce an ignition event;
a valve driver movable to operate the valve between the closed position and the open position;
a first solenoid positioned to produce a magnetic field that moves the driver to operate the valve and inject fuel into a combustion chamber of the internal combustion engine; and
a second solenoid electrically coupled to the electrode to provide electrical current to the electrode to produce the ignition event, wherein the electrical current is generated via the magnetic field.
9. The injector igniter of claim 8 wherein the valve is a first valve, wherein the injector igniter further comprises a second valve positioned proximate the electrode, and wherein the second valve is radially expandable to release the fuel into the combustion chamber.
10. The injector igniter of claim 8 , further comprising a capacitor electrically coupled to the electrode, wherein the capacitor provides ionizing current to the electrode.
11. The injector igniter of claim 8 wherein the first solenoid includes a first conductor having a first diameter, and the second solenoid includes a second conductor having a second diameter, different than the first diameter.
12. The injector igniter of claim 11 wherein the first diameter is approximately ten times greater than the second diameter.
13. The injector igniter of claim 8 wherein the second solenoid is electrically coupled to the electrode via an ignition conductor that extends through a majority of an axial length of the injector body.
14. The injector igniter of claim 13 , further comprising a core insulator coaxially disposed over the ignition conductor.
15. A method for injecting and igniting fuel in an internal combustion engine, the method comprising:
introducing fuel into an injector igniter;
providing a first electrical current to a first solenoid to generate a magnetic field;
moving a driver from a first position to a second position via the magnetic field;
moving a valve from a closed position to an open position via the movement of the driver from the first position to the second position, wherein movement of the valve from the closed position to the open position injects the fuel into a combustion chamber of the internal combustion engine;
generating a second electrical current in a second solenoid via the magnetic field; and
transmitting the second electrical current to an electrode to ignite the fuel.
16. The method of claim 15 wherein transmitting the current to an electrode includes transmitting the current via an ignition conductor positioned coaxially within a core insulator.
17. The method of claim 15 wherein the first electrical current is produced at a first voltage, and wherein the second electrical current is generated at a second voltage, greater than the first.
18. The method of claim 15 wherein the valve is a first valve, and wherein movement of the valve from the closed position to the open position injects the fuel into the combustion chamber via radial deformation of a second valve.
19. The method of claim 15 wherein transmitting the second electrical current to an electrode to ignite the fuel includes generating a plasma via the second electrical current.
20. The method of claim 15 , further comprising transmitting a third electrical current from a capacitor to the electrode.