System and method for reducing NOx emissions for natural gas engines

A chambered sparkplug carrier for a high compression natural gas engine having a pre-combustion chamber (PCC) configuration, the chambered sparkplug carrier comprising:

• a circular shaft having a first end receiving a chambered sparkplug, the chambered sparkplug engaged with the circular shaft by threads at a tip of the first end wherein a combustion chamber of the chambered sparkplug extends beyond the tip of the first end, the pre-combustion chamber having a plurality of orifices extending into a main combustion chamber of the natural gas engine further than the original PCC end, the plurality of orifices for receiving a lean mixture during the compression stroke from the main chamber of the natural gas engine;
• an internal extension coupling the chambered sparkplug to an ignition system at a second end of the circular shaft opposite to the first end;
• wherein the chambered sparkplug carrier replaces a pre-combustion chamber in the natural gas engine, the pre-combustion chamber having a smaller fraction of the combustion chamber of the original pre-combustion chamber of the natural gas engine;
• and
• wherein the chambered sparkplug carrier bypasses a PCC admission valve in an igniter sleeve of a PCC cylinder head of the natural gas engine, thereby eliminating a need for a separate PCC, gas admission valve and apparatus of the natural gas engine.