Patent ID: 7481189
Filing Date: 2009-01-27
Classification: F01B,F01L,F02B,F02D,F02F,F02G,Y02T

Abstract:
1. An internal combustion engine, comprising: a compression cylinder, an expansion cylinder, a piston in each of the cylinders, a crankshaft interconnecting the pistons for reciprocating movement between top and bottom dead center positions in the cylinders, a combustion chamber, a variable intake valve for controlling air intake to the compression cylinder, a variable outlet valve for controlling communication between the compression cylinder and the combustion chamber, means for introducing fuel into the combustion chamber where the fuel mixes with air from the compression cylinder to form a mixture which burns in the combustion chamber, a variable inlet valve for controlling communication between the combustion chamber and the expansion cylinder, and a variable exhaust valve for controlling exhaust flow from the expansion cylinder.