Patent ID: 6237559
Filing Date: 2001-05-29
Classification: F01L,F02B,F02D,Y02T

Abstract:
An arrangement of a four-cycle internal combustion engine comprising:at least a first combustion chamber with a reciprocating piston mounted herein, said first combustion chamber having cam driven intake and exhaust poppet valves; andat least a second combustion chamber with a reciprocating piston mounted therein, said piston having a top dead center and a bottom dead center position, said second combustion chamber having a cam driven exhaust poppet valve which can be selectively disabled to a closed position to deactivate said second combustion chamber, said second combustion chamber also having a variable phase cam driven intake poppet valve to selectively set a generally constant duration opening and closing operation of said intake valve to be generally symmetrically about one of said center positions during said second combustion chamber deactivation.