Sliding assembly

• Main Author: MEIRELLES TOMANIK ANTONIO EDUARDO
• Format: Patent
• Language: Chinese; English
• Published: 30.03.2016
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; CYLINDERS; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

A sliding assembly is described for use in an internal combustion engine, comprising a cylinder liner (1) and at least one piston ring (10), the liner (1) comprising a through-bore that defines an internal surface (S) which, in turn, defines three portions, a first portion (2) near the end of the piston stroke, facing the cylinder head (next to the top dead centre - TDC), a second, central portion (3), and a third portion (4) near the end of the piston stroke, facing the crankshaft of the engine (next to the top dead centre - TPC), wherein (i) the TDC portion (2) of the liner (1) has a surface finish with a first roughness value defined by a structure of recesses and projections ("valleys" and "peaks"); the central portion (3) of the liner (1) has a surface finish with a second roughness value defined by a structure of recesses and projections ("valleys" and "peaks"); the BDC portion (4) of the liner (1) has a surface finish with a third roughness value defined by a structure of recesses and projections ("val