Combustion chamber scavenging system

Claim 1

A two-cycle, crankcase compression engine comprising: (A) a generally horizontal cylinder; (B) a piston mounted for reciprocation in said cylinder and defining a variable volume combustion chamber in one end of said cylinder; (C) a crankcase chamber at the other end of said cylinder having a volume which varies as said piston reciprocates; (D) a transfer passage means formed in the walls of said cylinder for transferring air-fuel mixture from said crankcase chamber to said combustion chamber and creating a loop charging flow pattern in said combustion chamber; (E) a spark plug in said combustion chamber for igniting said air-fuel mixture; (F) an exhaust port in said combustion chamber for exhausting combustion gases from said combustion chamber; and (G) a secondary passage connecting a low point in said transfer passage means where liquid fuel may accumulate to said combustion chamber adjacent said spark plug to admit fuel or air-fuel mixture to said combustion chamber directed toward said exhaust port, said secondary passage including a one-way valve to prevent flow from said combustion chamber.