Patent ID: 8251041
Filing Date: 2012-08-28
Classification: F01L,F02B,F02D,Y02T

Abstract:
1. An internal combustion engine apparatus comprising: a cylinder bounded by a cylinder wall and a cylinder head forming a cylinder volume of variable size fitted with a moveable piston within the cylinder; the piston is fitted with at least an upper piston ring and a lower piston ring; the piston is connected to a crankshaft by a connecting rod; a cylinder wall cavity located within the cylinder wall, the cylinder wall cavity is in pneumatic communication with the cylinder volume unless the cylinder wall cavity is sealed by at least the upper piston ring; a portion of a fuel and air mixture within the cylinder volume is captured within the cylinder wall cavity as the piston moves in the cylinder compressing the mixture whereby the captured portion of the mixture is sealed within the wall cavity and separated from the cylinder volume by at least the upper piston ring; the piston moves further compressing the remaining mixture in the cylinder volume to a higher pressure than the captured mixture within the wall cavity whereby ignition of the remaining mixture in the cylinder volume occurs at the higher pressure; the piston reverses direction after reaching top dead center and the captured mixture in the wall cavity is ignited as the upper piston ring unseals the wall cavity thereby adding energy to expanding gas within the cylinder; and as the piston moves, the connecting rod turns the crankshaft.