Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1997-02-12
1998-05-19
Okonsky, David A.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123 9014, F02B 7502
Patent
active
057524777
ABSTRACT:
The present invention relates to a two-stroke engine comprising at least a cylinder (111) in which a piston (112) moves and one end of which communicates with a pump sump (115) crossed by the crankshaft (114) of the engine, a capacity under pressure (87) opening at one end into said pump sump, at the other end into the combustion chamber (113) of cylinder (111), a valve (86) providing an intermittent seal between chamber (113) and capacity (87), a means (88) for carburetting the gases passing through said capacity (87), a means (82) for controlling the motion of said valve (86), comprising a supple membrane (89) separating a first chamber (95a) and a second chamber (95b), said membrane being connected to the valve rod. According to the invention, said engine further comprises a first means (92) for connecting the second chamber (95b) to the cylinder, the means being intended to retard the opening of said valve (86) by controlling the pressure in said chamber (95b).
REFERENCES:
patent: 1361109 (1920-12-01), Spohrer
patent: 2334688 (1943-11-01), Norton
patent: 4995350 (1991-02-01), Kumagai et al.
patent: 5005537 (1991-04-01), Maissant
patent: 5277222 (1994-01-01), Clarke
patent: 5586523 (1996-12-01), Kawahara et al.
Institut Francais du Pe'trole
Okonsky David A.
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