Spark ignited radical injection system

1. A system, comprising:

a free-radical ignition system, comprising:

a pre-combustion chamber;

an air intake port coupled to the pre-combustion chamber;

a fuel intake port coupled to the pre-combustion chamber;

an ignition source coupled to the pre-combustion chamber; and

a free-radical injection passage coupled to the pre-combustion chamber.

2. The system of claim 1 , comprising a quench system coupled to the pre-combustion chamber or the free radical injection passage.

3. The system of claim 2 , wherein the quench system comprises at least one coolant path disposed along the free-radical injection passage.

4. The system of claim 3 , wherein the at least one coolant path comprises a coolant coil disposed about the free-radical injection passage.

5. The system of claim 3 , wherein the at least one coolant path comprises a coolant chamber disposed about the free-radical injection passage.

6. The system of claim 2 , wherein the quench system comprises a heat exchanger.

7. The system of claim 1 , wherein the ignition source comprises a spark plug.

8. The system of claim 1 , wherein the free-radical injection system is configured to force the free radicals into the combustion chamber at an ignition timing to trigger combustion of a second fuel-air mixture in the combustion chamber.

9. The system of claim 1 , wherein the free-radical injection passage comprises a winding passage.

10. The system of claim 1 , comprising a plurality of free-radical injection passages coupled to the pre-combustion chamber, and a quench system coupled to the pre-combustion chamber or the plurality of free-radical injection passages.

11. The system of claim 10 , wherein the quench system comprises a coolant chamber, and the plurality of free-radical injection passages comprises a plurality of free-radical injection tubes extending through the coolant chamber.

12. The system of claim 11 , wherein the plurality of free-radical injection tubes comprises a plurality of winding free-radical injection tubes.

13. The system of claim 1 , comprising an engine having a combustion chamber and the free-radical ignition system, wherein the free-radical injection passage is coupled to the combustion chamber.

14. The system of claim 13 , comprising a pump or a compressor driven by the engine.

15. The system of claim 1 , wherein the free radicals comprise peroxides, aldehydes, or a combination thereof.

16. A system, comprising:

a free-radical ignition controller comprising:

control to ignite a fuel with an air in a pre-combustion chamber;

control to inject a flow having free radicals from the pre-combustion chamber to a combustion chamber; and

control to quench the flow having the free-radicals.

17. The system of claim 16 , wherein control to quench comprises extinguishing a flame formed by igniting the fuel with the air.

18. The system of claim 16 , wherein the free radicals comprise peroxides, aldehydes, or a combination thereof.

19. A method, comprising:

injecting air from an air intake port directly into a pre-combustion chamber;

injecting fuel from a fuel intake port directly into the pre-combustion chamber;

igniting, via an ignition source, the fuel with the air;

injecting a flow having free-radicals from the pre-combustion chamber to a combustion chamber.

20. The method of claim 19 , comprising quenching, via a quench system, the flow having the free radicals.

21. The method of claim 20 , wherein quenching comprises extinguishing a flame formed by igniting the fuel with the air.

22. The method of claim 20 , wherein quenching comprises flowing a coolant along an injection passage, and the injection passage extends from the pre-combustion chamber to the combustion chamber.