Structure for preventing oil leakage in a rotary engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorMinoru Morita
Life of this patent
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Abstract
A structure for preventing oil leakage which occurs between a side wall of a rotor and the inner surface of a side housing in a rotary engine, comprising at least one oil groove formed in the side wall of the rotor in a region located inside of a conventional annular oil seal means. The oil groove formed in the side wall of the rotor extends helically around the center of the rotor.
Claims7
A structure for preventing oil leakage in a rotary engine which comprises a casing having at least two side housings and a center housing positioned therebetween, a rotor, rotatably disposed within said casing, said rotor being adapted to rotate eccentrically within said casing, an annular oil seal groove formed in the side wall of the rotor, an annular oil seal ring mounted in said annular oil seal groove for maintaining gas tightness and oil tightness between a side wall of the rotor and a side housing, and at least one oil groove formed in the side wall of the rotor and located radially inside of said annular oil seal groove, said oil groove having a gradually increasing cross-sectional area from its radial outer end toward its radial inner end, a closed radial outer end and an opened radial inner end, said oil groove extending helically around the center of the rotor.
Dependencies are inferred from the claim text.