Ammonia pre-chamber internal combustion engine

An ammonia-burning engine, comprising:

• a plurality of combustion cylinders, each combustion cylinder comprising:
• a main chamber;
• a piston configured to move within the main chamber;
• a pre-chamber fluidly coupled to the main chamber, wherein an internal volume of each pre-chamber is at least 5% v/v of an internal volume of the corresponding main chamber having a top dead center piston position;
• a fuel injector configured to inject a liquid fuel comprising ammonia into the pre-chamber;
• and
• an ignition device configured to generate a spark within the pre-chamber.

A method of operating a combustion engine, comprising:

• introducing, during an intake stroke of an internal combustion engine, a volume of a fuel comprising ammonia into a pre-chamber of the combustion engine, and a primary charge fluid into a main chamber;
• compressing, during a compression stroke of the internal combustion engine, the primary charge fluid into the pre-chamber such that the volume of the fuel and the primary charge fluid form a compressed mixture;
• igniting the compressed mixture in the pre-chamber;
• and
• flowing, during a power stroke of the combustion engine, the ignited rich mixture into the main chamber.