Two-cycle engine with pure air scavenging
OwnerEric Jaulmesinventor
Life of this patent
Estimating the term…
Abstract
A two-cycle internal combustion engine includes a cylinder, a piston in the cylinder and a crankcase pump. The crankcase pump is divided into a first chamber and a second chamber by a membrane. At least one respective transfer passage connects each of the respective chambers to the cylinder. Inlets are provided for admitting pure air into the first chamber and for admitting carbureted air into the second chamber. Devices are provided for opening that one of the transfer passages communicating between the cylinder and the first chamber first and thereafter for opening the one of the transfer passages communicating between said cylinder and said second chamber during operation of the engine.
Claims10
A two-cycle internal combustion engine, the engine comprising a cylinder;
- a piston in said cylinder;
- at least one exhaust ports, at least one carbureted air intake port and at least one pure air inlet port in the cylindrical wall of said cylinder, all of said ports being covered and uncovered by said piston as it moves in said cylinder;
- a crankcase pump, said crankcase pump being divided into a first chamber and a second chamber by a membrane;
- at least one first transfer passage connecting said first chamber to said cylinder via said at least one pure air inlet port;
- at least one second transfer passage connecting said second chamber to said cylinder via said at least one carbureted air inlet port, said at least one pure air inlet port being position in said cylinder wall so as to be uncovered during downward movement of said piston in said cylinder ahead of said at least one carbureted air inlet port;
- means for admitting pure air into said first chamber;
- and means for admitting carbureted air into said second chamber, whereby the pure air supplied via said at least one pure air inlet port scavengers exhaust gases during operation of the engine.
Dependencies are inferred from the claim text.