Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1986-03-17
1987-06-16
Feinberg, Craig R.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123 65V, F02B 7502
Patent
active
046729240
ABSTRACT:
A two-cycle engine includes a pair of first and second valves movable into and out of respective closed positions where the first and second valves close part of an exhaust port to vary an exhaust timing thereof. Power transmission means includes a pair of first and second shafts angularly movable about their respective axes disposed parallel to an axis of a cylinder and each having a pinion portion. A rack rod is movable along an axis thereof perpendicular to the axis of the cylinder, the rack rod having first and second rack portions meshingly engaging the pinion portions of the first and second shafts, respectively, in such a manner that the angular movement of the first shaft causes the angular movement of the second shaft through the rack rod. A pair of first and second levers of a generally L-shape defined by a pair of perpendicularly-disposed first and second arms has a corner portion where the first and second arms merge. Each lever is angularly movable about an axis passing through the corner portion and disposed parallel to the shafts. The first and second arms of each lever is engaged respectively with a respective one of the first and second valves and a respective one of the first and second shafts in such a manner that the angular movements of the first and second shafts cause the angular movements of the first and second levers, respectively, to move the first and second valves into and out of their closed positions.
REFERENCES:
patent: 4121552 (1978-10-01), Mithuo et al.
patent: 4202297 (1980-05-01), Oku et al.
patent: 4285311 (1981-08-01), Iio
patent: 4321893 (1982-03-01), Yamamoto
patent: 4341188 (1982-07-01), Nerstrom
patent: 4364346 (1982-12-01), Shiohara
patent: 4368703 (1983-01-01), Shibata
Hiasa Toshikazu
Uchida Hiroyuki
Feinberg Craig R.
Honda Giken Kogyo Kabushiki Kaisha
Okonsky David A.
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