Internal seal for rotary piston combustion engine
AssigneesAudi NSU Auto Union Aktiengesellschaft, Wankel GmbH
InventorMax Ruf
Life of this patent
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Abstract
The invention relates to an internal seal for rotary piston combustion engines of the trochoid type in which a housing consisting of two end pieces and a multiarcuate shell contains a polygonal piston rotatably mounted on an eccentric. At least one sealing ring conconcentric with the piston axis of rotation is disposed in a recess of the piston in each of its two end faces. The ring is pressed by spring means against the adjoining end piece and is sealingly and slidably engaged therewith to prevent passage of coolant or lubricant into the working chambers. The seal between the sealing ring and a wall of the recess in the end face of the piston is effected by an elastic ring.
Claims6
An internal seal for rotary piston combustion engines of the trochoid type having a housing of two end pieces and a multi-arcuate shell in which a polygonal piston is rotatably mounted on an eccentric, the piston having at least one sealing ring concentric with its axis of rotation in a recess on each of its two end faces the sealing ring being pressed by spring means against the adjoining end piece and sealingly slidable thereon, said sealing ring having [a] an inner surface parallel to and spaced from a wall of said recess and means for establishing a seal between said inner surface of said sealing ring and said wall the improvement which comprises as the means for establishing said seal;
- a spring metal ring, C-shaped in cross-section, interposed in the space between said inner surface and said wall and abutting each of said inner surface and said wall along continuous lines of contact, said C-shaped ring [forcing] sealing the space between said sealing ring inner surface [against] and said recess wall.
Dependencies are inferred from the claim text.