| 摘要 |
Apparatus for controlling the volume of air or air and non-combusted fuel mixture inside a combustion chamber (7) and cylinder (3) of an internal combustion engine is disclosed. The apparatus comprises: an inlet-outlet portal (9) having open and closed states and connected to air or air and non-combusted fuel source(s); a combustion chamber; a piston (1) housed within the cylinder; and a substantially incompressible member (21) fixedly attached to the inside of the combustion chamber or a substantially incompressible member (23) fixedly attached to a top face of the piston, the engine having an expansion ratio of 15 to 22 or 35 to 50; wherein the inlet-outlet portal is controlled, when open, to permit air or air and non-combusted fuel mixture to enter or enter and exit the combustion chamber and cylinder and when closed to prevent air or air and non-combusted fuel mixture from entering or exiting the chamber and cylinder, in which the volume of air or air and non-combusted fuel mixture located inside the chamber and cylinder when the inlet-outlet portal closes, is less than the volume of the combustion chamber and cylinder defined when the piston is at the bottom dead centre, BDC, position inside the cylinder when the inlet-outlet portal is closed. |
