Patent ID: 6708655
Filing Date: 2004-03-23
Classification: F02B

Abstract:
An internal combustion engine, comprising:a combustion cylinder having an end; a primary piston reciprocally disposed within said combustion cylinder; a cylinder head including a bottom deck disposed at said end of said combustion cylinder, said cylinder head defining a secondary cylinder having a diameter; a secondary piston reciprocally disposed within said secondary cylinder; an actuator coupled with said secondary piston for controlling a position of said secondary piston dependent upon a position of said primary piston, said actuator selectively controlling said position of said secondary piston to control commencement of a combustion event in said combustion cylinder; and a communication port defined in said cylinder head establishing fluid flow communication between said combustion cylinder and said secondary cylinder, said communication port including an opening in said bottom deck and an opening to said secondary cylinder, said opening in said bottom deck being narrower than said diameter of said secondary cylinder.