Upper compression ring for piston of internal combustion engine, has stiffener increasing ring stiffness along longitudinal axis, and including section with length lesser than/equal to ring thickness and breadth ten times lesser than length

摘要

#CMT# #/CMT# The ring (2) has a stiffener (3`) for increasing stiffness of the ring along a longitudinal axis (6) of a piston and including a rectangular section (5). The section has a length (L) lesser than or equal to thickness (e) of the ring and a breadth (l) ten times lesser than the length. A material constituting the stiffener has a Young`s modulus three times higher than the Young`s modulus of another material constituting the ring. #CMT#USE : #/CMT# Used for being arranged in a circular groove of a piston of an internal combustion engine (claimed) for ensuring a sealing between lower and upper parts respectively having a lubricating oil pan and a combustion chamber of the engine. #CMT#ADVANTAGE : #/CMT# The rectangular section has the length lesser than or equal to the thickness of the ring and the breadth ten times lesser than the length, so that the stiffener has less influence on radial stiffness of the ring, thus permitting to precisely increase the axial stiffness of the ring without modifying the radial stiffness of the ring. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a detailed perspective representation of a section of a ring. e : Upper compression ring`s thickness l : Rectangular section`s breadth L : Rectangular section`s length 2 : Upper compression ring 3` : Stiffener 5 : Rectangular section 6 : Piston`s longitudinal axis.