Patent ID: 8662053
Filing Date: 2014-03-04
Classification: F01P,F02B,F02M,Y02T

Abstract:
1. A method, comprising: providing a natural gas-fueled spark ignition engine including a cylinder head having a head cooling passage and a spark plug passage; enlarging the spark plug passage to provide an enlarged passageway; providing a pre-combustion device including a first end defining an inner passage to receive a spark plug, a second end defining a pre-combustion chamber and a plurality of circumferential holes, and an outer surface structured to engage the cylinder head; mounting the cylinder head to an engine block; engaging the outer surface to the cylinder head, wherein the second end extends at least partially into a combustion chamber of a cylinder in response to the engaging the outer surface to the cylinder head, and wherein the plurality of circumferential holes fluidly couple the pre-combustion chamber with the combustion chamber of the cylinder; receiving a spark plug in the inner passage; igniting a fuel and air mixture in a primary volume of the pre-combustion chamber; and receiving residual ignition gas in a secondary volume of the pre-combustion chamber.