Internal-combustion engines – Valved piston – Charge passes from crankcase through valve in piston
Patent
1992-03-18
1993-04-13
Okonsky, David A.
Internal-combustion engines
Valved piston
Charge passes from crankcase through valve in piston
123 74AE, F01L 1100
Patent
active
052012867
ABSTRACT:
A two-stroke cycle internal combustion engine including a crankshaft, a connecting rod pivotally connected to the crankshaft, a fuel induction system and spark plug or the like. The cylinder has a closed head end and a closed rearward end and a piston within the cylinder defines a combustion chamber as well as a charging chamber. A plurality of radial inlet ports formed in the cylinder wall is normally closed by the piston but is opened to the charging chamber when the piston passes through its top dead center position. A plurality of radial exhaust ports also is formed in the cylinder wall and is normally closed by the piston but opened to the combustion chamber as the piston passes through its bottom dead center position. An axial valve port is formed in the crown of the piston to communicate between the charging chamber and the combustion chamber. An operating rod mounted in the cylinder has a valve head formed on its inner end to close the valve port. The other end of the operating rod extends through a sealed axial passage at the bottom of the cylinder end is connected to the connecting rod. When the piston approaches its bottom dead center position, its retraction movement is limited by fluid pressure caused by compressed gas in the charging chamber and accordingly the operating rod disengages from the crown of the piston to open the valve port and admit a charge from the charging chamber to the combustion chamber.
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Malibu Corporation
Okonsky David A.
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