SHAPING A FUEL CHARGE IN A COMBUSTION CHAMBER WITH MULTIPLE DRIVERS AND/OR IONIZATION CONTROL

• US 20110056458A1
• Filed: 07/21/2010
• Published: 03/10/2011
• Est. Priority Date: 01/07/2008
• Status: Active Grant

• Current Assignee: Advanced Green Innovations, LLC
• Original Assignee: McAlister Technologies, LLC
• Inventors: McAlister, Roy E.
• Granted Patent: US 8,365,700 B2
• Time in Patent Office: Days
• US Class Current: 123/297
• CPC Class Codes: F02D 35/021 using an ionic current sensor
• CPC Class Codes: F02D 37/02 one of the functions being ignition
• CPC Class Codes: F02D 41/3836 Controlling the fuel pressure
• CPC Class Codes: F02D 41/40 with means for controlling injection timing or duration
• CPC Class Codes: F02D 41/402 Multiple injections
• CPC Class Codes: F02M 51/0671 the armature having an elongated valve body attached thereto
• CPC Class Codes: F02M 57/005 the devices being sensors
• CPC Class Codes: F02M 57/06 the devices being sparking plugs
• CPC Class Codes: F02M 69/041 having vibrating means for atomizing the fuel, e.g. with sonic or ultrasonic vibrations
• CPC Class Codes: F02P 15/006 Ignition installations combined with other systems, e.g. fuel injection to advance or to retard the ignition spark F02P5/045

Abstract

The present disclosure is directed to injectors with integrated igniters providing efficient injection, ignition, and complete combustion of various types of fuels. These integrated injectors/igniters can include, for example, multiple drivers used to shape charges, controllers used to modify operations based on ionization parameters, and so on.

Claims

1. A fuel injector, comprising:

a body having a middle portion extending between a base portion and a nozzle portion;

wherein the body includes a channel configured to allow fuel to pass between the base portion and the nozzle portion to a combustion chamber of a fuel combustion engine;

an actuator contained within the channel of the body, the actuator having a distal end and a proximal end;

a flow control device fluidically coupled to the channel and operably connected to a distal end of the actuator;

a first driver operably connected to a proximal end of the actuator;

a second driver operably connected to the proximal end of the actuator; and

a controller operably connected to the drivers and configured to provide operating instructions to the drivers.

2. The fuel injector-igniter of claim 1, wherein the first driver is a driver configured to cause the actuator to move the flow control device outwardly from the nozzle portion into an open position to allow fuel within the channel to exit the channel;

and wherein the second driver is a driver configured to modulate the movement of the flow control device when the flow control device is in an open position.

3. The fuel injector-igniter of claim 1, wherein the first driver is an electromagnetic component configured to cause the actuator to move the flow control device laterally with respect to the channel and the second driver is a piezoelectric component configured to modulate the lateral movements of the flow control device.

4. The fuel injector-igniter of claim 1, wherein the flow control device is a valve.

5. The fuel injector-igniter of claim 1, further comprising:

a sensor configured to measure parameters associated with a fuel ignition event within the fuel combustion engine; and

a flow modification component located at the controller and configured to modify the operating instructions provided to the drivers based on data received from the sensor and associated with the measured parameters.

6. A method in a controller of a fuel injector for injecting fuel into a direct fuel injection engine, comprising:

measuring at least one parameter associated with an air-fuel mixture inside a combustion chamber of a direct fuel injection engine; and

transmitting instructions to one or more drivers that manipulate a valve of the fuel injector, wherein the instructions include;

information associated with movement of the valve into an open position to dispense fuel from the fuel injector into the combustion chamber; and

instructions associated with modulating the movement of the valve when the valve is in the open position to modify the shape of the fuel dispensed into the combustion chamber.

7. The method of claim 6, wherein measuring at least one parameter associated with the air-fuel mixture includes measuring a degree of ionization of the air-fuel mixture during an ignition of the air-fuel mixture within the combustion chamber.

8. The method of claim 6, wherein measuring at least one parameter associated with the air-fuel mixture includes measuring a ratio of air to fuel within the air-fuel mixture.

9. The method of claim 6, wherein measuring at least one parameter associated with the air-fuel mixture includes measuring a rate of combustion of the air-fuel mixture during an ignition event within the combustion chamber.

10. A fuel injection system configured to inject fuel into a combustion chamber of a combustion engine, the system comprising:

a fuel dispensing component, wherein the fuel dispensing component is configured to dispense fuel having a certain ratio of surface area to volume into the combustion chamber;

a measurement component, wherein the measurement component is configured to measure conditions within the combustion chamber; and

a control component in communication with the fuel dispending component and the measurement component, wherein the control component is configured to provide instructions to the fuel dispensing component associated with a modification of the certain ratio of surface area to volume of the fuel dispensed into the combustion chamber.

11. The system of claim 10, wherein the fuel dispensing component includes:

a body having a middle portion extending between a base portion and a nozzle portion, wherein the nozzle portion is configured to connect the body to the combustion engine;

a channel located within the body configured to store fuel and allow fuel to flow from the base portion to the nozzle portion;

an actuator located within the channel and having a distal end and a proximal end;

a valve fluidically coupled to the channel and operably connected to the distal end of the actuator;

a first driver operably connected to the proximal end of the actuator, wherein the first driver receives at least a first portion of the instructions provided by the control component associated with opening of the valve; and

a second driver operably connected to the proximal end of the actuator, wherein the second driver receives at least a second portion of the instructions provided by the control component associated with modulating an open valve.

12. The system of claim 10, wherein the measurement component is configured to measure an ionization parameter of an air-fuel mixture within the combustion chamber during a combustion event.

13. The system of claim 10, wherein the measurement component is a sensor located within the fuel dispensing component.

14. The system of claim 10, wherein the control component includes a processor and memory, wherein the memory contains a relational database that includes entries relating various ratios of surface area to volume for dispensed fuel with respect to conditions within the combustion chamber.

15. A method for injecting fuel into a combustion chamber of an engine, the method comprising:

applying a first driving force to a valve of a fuel injector, wherein the first driving force opens the valve and causes fuel having a certain shape within the fuel injector to flow into a combustion chamber of an engine; and

applying a second driving force to the valve of the fuel injector, wherein the second driving force moves the valve at a certain frequency and causes the fuel to flow into the combustion chamber having a modified shape.

16. The method of claim 15, further comprising:

receiving information associated with ionization of a mixture of the fuel and air during an ignition event within the combustion chamber; and

applying the second driving force to move the valve at a frequency different than the certain frequency based on the received ionization information.

17. The method of claim 15, wherein the certain shape is defined by a certain ratio of the surface area of the fuel to the volume of the fuel.

18. A system for igniting fuel within a combustion chamber, the system comprising:

a fuel injector, wherein the fuel injector is configured to inject fuel into the combustion chamber;

a fuel igniter including two electrodes, wherein the fuel igniter is configured to produce a current that ignites a mixture of air and the injected fuel within the combustion chamber in response to a voltage applied to the two electrodes;

an ionization sensor, wherein the ionization sensor is configured to measure the ionization of the ignited mixture; and

an operation controller, wherein the operation controller is configured to modify the operation of the fuel igniter in response to the measured ionization of the ignited mixture.

19. The system of claim 18, wherein the operation controller reverses the polarity of the voltage applied to the two electrodes based on the measured ionization.

20. The system of claim 18, wherein the operation controller adjusts a frequency of reversing the polarity of the voltage applied to the two electrodes based on the measured ionization.

21. The system of claim 18, wherein the fuel igniter is integrated into the fuel injector.

22. The system of claim 18, wherein the fuel igniter is a spark plug separate from the fuel injector.

23. A method of operating a fuel combustion engine, the method comprising:

injecting fuel into a combustion chamber of the fuel combustion engine;

applying a voltage at a certain polarity to electrodes within the combustion chamber to cause a mixture of air and the injected fuel within the combustion chamber to combust; and

after a complete engine cycle;

injecting additional fuel into the combustion chamber; and

applying a voltage at a polarity in reverse of the certain polarity to the electrodes within the combustion chamber to cause a mixture of air and the fuel injected after the complete engine cycle to combust.

24. The method of claim 23, further comprising:

after two complete engine cycles;

injecting additional fuel into the combustion chamber; and

applying a voltage at the certain polarity within the combustion chamber to cause a mixture of air and the fuel injected after the two complete engine cycles to combust.