Patent ID: 7467608
Filing Date: 2008-12-23
Classification: F01L,F02B,F02D,F02M,Y02T,Y10T

Abstract:
1. A method for operating a two stroke cylinder engine, the method including the steps of: (a) obtaining a two stroke cylinder of the type having a piston which reciprocates between top dead center and bottom dead center during a power stroke and between bottom dead center and top dead center during a return stroke, an intake valve and an exhaust valve for opening communication between the inside of the cylinder and the outside environment to exhaust combustion products from the cylinder and wherein the power stroke includes a first half which begins at top dead center and ends half way between top dead center and bottom dead center and a second half which begins at half way between top dead center and bottom dead center and ends at bottom dead center, and wherein the return stroke includes a first half which begins at bottom dead center and ends half way between bottom dead center and top dead center and a second which begins at halfway between bottom dead center and top dead center and ends at top dead center, (b) obtaining a source of compressed air including a compressor, a reservoir for receiving and storing compressed air from the compressor, a hot conduit for conveying hot compressed air from the reservoir and a cool conduit for conveying cooled compressed air from the reservoir and a valve for combining compressed air from the hot conduit and the cool conduit to make a compressed air mixture having a temperature between the temperature of the air in the hot conduit and the temperature of the air in the cool conduit, (c) opening the intake valve, (d) injecting the compressed air mixture into the cylinder through the intake valve during the second half of the return stroke and injecting fuel into the cylinder during the second half of the return stroke, (e) closing the intake valve, (f) initiating combustion of the fuel air mixture after the injection of into the cylinder and after the intake valve is closed, (g) opening the exhaust valve after the cylinder has reached the second half of the power stroke to thereby exhaust the combustion products from the cylinder, and, (h) closing the exhaust valve after the commencement of the injection of the compressed air into the cylinder and prior to the injection of fuel into the cylinder.