Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

Abstract: Disclosed is an electro-optical component package (12), arranged as a dual in-line pin (DIP) package, and a socket (13) therefor. Connector pins (17) extending from the package establish electrical and optical contact to the package with mating connector receptacles (19) of the socket. Each pin and receptacle has a metallic body (41,26) for establishing electrical connection between the pin and receptacle when the two are mated. Each body defines a passageway (42,27) through which extends an optical fiber (30,21). When the bodies of a pin and receptacle are mated, the optical fibers extending therethrough are optically coupled. The receptacle includes a cup member (39) that is positioned loosely and movably in its passageway. The cup member defines a passageway (37) by which it mounts around the end of the receptacle's fiber. When the pin and receptacle are mated, the cup member receives and mates the end portion (51) of the pin, thereby aligning the ends (57,46) of the receptacle's and pin's fibers.