Running-in wear of a compression ignition engine: Factors influencing the conformance between cylinder liner and piston rings

Zinc dialkyl dithiophosphate antiwear tribofilm and its effect on the topography evolution of surfaces: A numerical and experimental study

“…During the process of change in the roughness of the surfaces, load carrying capacity is increased due to the gradual development of asperity-level conformity. The increase in the conformity of the surfaces is significant as peaks and valleys of the surfaces correspond to each other, and the overall performance of the system is improved (9)(10)(11).…”

Time Dependent Wear and Its Mechanisms in Engine Cylinders

“…Here, the wear measuring area of the wear probe is b x a where b is the width of the measuring area and a is the measuring length along the axis of the cylinder liner. For the pistonring of thickness t,, the nominal area A in Equation (8)(9)(10)(11)(12) should be b x t,.. Therefore, at crank angle 9 Equation The crank angle degree which covers the measuring area of the wear probe is from 9, to GL Therefore, the wear volume in the measured area of the wear probe, due to piston moving from 8, …”

“…Yflctr tn e~r (8)(9) where l g is the length from the big end of the connecting-rod to the center of mass of the connecting-rod. 1 is the length of the connecting-rod.…”

“…In an engine, the force acting on the cylinder liner by a ring in the wear measuring area is F(9) = p w (9)A (8)(9)(10)(11)(12) where A is the nominal contacting area between the liner and the ring within the wear measuring area. Here, the wear measuring area of the wear probe is b x a where b is the width of the measuring area and a is the measuring length along the axis of the cylinder liner.…”

Avaliação do desgaste em cilindros de motores de combustão interna - mapeamento de mecanismos e quantificação do desgaste.

“…A este período inicial de amaciamento, dá-se o nome de running-in [24,153,154]. Embora a fase inicial do desgaste de cilindros de motores seja benéfica e resulte no aumento do desempenho do tribossistema anel/cilindro [155], o desgaste excessivo de cilindros pode diminuir a eficiência volumétrica do motor e aumentar blow-by, consumo de óleo, emissão de poluentes e eventuais perdas de potência [4][5][6].…”