Piston ring for improved lubrication oil consumption

A method of fabricating a ring for a piston assembly for an internal combustion engine, the method comprising:

• machining a lower surface and an outer radial surface of the ring to form a scraping corner;
• and
• machining an upper surface to be parallel with the lower surface in a cross section of the ring;
• wherein the upper surface and the lower surface form a positive first angle with respect to a radial axis of the ring, the radial axis extending radially from a centroid of the ring;
• wherein a central axis is formed that passes through the centroid and is orthogonal to the radial axis, and the outer radial surface forms a positive second angle with respect to the central axis;
• wherein a cross-section of the ring includes a rotational center such that a constant force occurs in the ring about its circumference and between its adjacent free ends, causing a constant amount of twist about the rotational center of the ring, the axis of rotation defined at each cross-sectional location of the ring about its circumference and between the adjacent free ends.

A ring for a piston assembly, the ring having a cross-section comprising:

• a lower surface and an outer radial surface that form a scraping corner;
• an inner radial surface;
• and
• an upper surface;
• wherein:
• the upper surface and the lower surface are parallel with one another, and the upper surface and lower surface form a positive first angle with respect to a radial axis, wherein the radial axis is defined as an axis that extends radially from a centroid of the ring;
• and
• the outer radial surface forms a second angle with respect to a central axis that is orthogonal to the radial axis;
• such that a force is imparted at the scraping corner in a direction that is opposite a direction of an axial motion, causing the ring to twist from a static state to a dynamic flexed state and against a groove of the piston assembly, wherein an amount of twist in the flexed state occurs the same amount at each cross-sectional location of the ring about its circumference and between adjacent free ends thereof.