Two-cycle engine

Details Two-cycle engine Two-cycle engine

2005-05-10

2005-05-10

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

Reexamination Certificate

active

06889636

ABSTRACT:
A two-stroke cycle internal combustion engine (10) has a one-piece cylinder housing (14) which is vertically aligned with a crank housing (16) and a valve housing (12) mounted at a top section of the cylinder housing. The valve housing (12), cylinder housing (14), and crank housing (16) are generally formed in a substantially symmetrical manner about a vertical axis line (20). The valve housing (14) contains a valve control mechanism (54) which aids in the reversible vertical placement of a valve member (34) having an extended length value stem (38) and a valve head (36). A controlled air insertion mechanism (92) provides for high pressure air to be inserted into a combustion chamber (42) to thoroughly expel spent gases through exhaust port46and there is further provided a recess (102) for cooperation with a relief opening (104) to relieve gas pressures built up.

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