Patent ID: 6446595
Filing Date: 2002-09-10
Classification: F01C,F02B,Y02T,Y10T

Abstract:
An internal combustion engine comprising,engine housing walls, a working chamber, inlet and exhaust ports, first and second piston assemblies each of which assemblies includes at least one pair of diametrically opposite pistons within said working chamber rotatable about a rotational axis of said piston assemblies and dividing said working chamber into a plurality of pairs of diametrically opposed subchambers, means for interconnecting said first and second piston assemblies for variablespeed rotation of the first and second piston assemblies in the same direction during recurrent periods of rotation such that at least one pair of diametrically opposed subchambers decreases in volume while at least one other pair of diametrically opposed subchambers increases in volume, for each complete revolution of the first and second piston assemblies a plurality of operating cycles are completed, each operating cycle including successive power, exhaust, intake, and compression phases, said piston assemblies include spark plugs having electrodes with spark gaps in communication with each subchamber for initiating power phases, and said housing wall having a spark plug maintenance hole for access to said spark plugs.