Reciprocating piston engines
OwnerJulian Branstoninventor
Life of this patent
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Abstract
A reciprocating piston engine has a cylinder with a transfer port and an exhaust port, wherein the transfer port and exhaust port are at least partially coincident and are provided with a port valve. The engine includes a pump having a divided chamber therein, one side of the chamber being connected to a crankcase via a connecting port, and the other side of the chamber having an inlet port, an outlet port, and a valve to ensure unidirectional flow therethrough. The chamber is divided by a moving member responsive to variations in pressure in the crankcase to cause flow through the other side of the chamber.
Claims10
A two-stroke engine having a crankcase, a crank, a connecting rod, a piston and a cylinder with a transfer tract, a transfer port and an exhaust port, whereby the transfer port and the exhaust port are at least partially coincident, the transfer port and the exhaust port being further provided with a port valve, operable between a position to substantially close the transfer port and open the exhaust port during an exhaust phase of the engine, and a position to substantially open the transfer port and close the exhaust port during a transfer phase of the engine.
Dependencies are inferred from the claim text.