Investigation of Friction Characteristics in Segmented Piston Ring Liner Assembly of IC Engine

Publication date: Available online 5 July 2016 Source:Perspectives in Science Author(s): Tejaskumar Chaudhari, Bharatkumar Sutaria The friction at the piston ring cylinder liner assembly (PRLA) is a major contributor in the total friction losses in the I.C. engine. New materials, coatings and high-tech machining processes that previously were considered to be too expensive and therefore only used in complex applications are today becoming more affordable. A significant amount of the total power loss in a modern automotive engine is due to the Friction interaction between the top compression ring and the cylinder liner, especially at the TDC and BDC where boundary lubrication exists. The change in piston speed is accompanied with change the lubrication regime in the cylinder, which results change in friction between the ring and the liner during the entire stroke of the piston. Theoretical modelling of friction force from the various sources of friction will be compared to experimental results for analyzing the tribological characteristics. The appropriate sample of piston ring and cylinder liner pair is developed for studying the different tribological parameters on Reciprocating Tribometer. The variable parameters are engine speed, oil viscosity, and load. The experimental results and observations are studied under different operating conditions in speed ranges from 300rpm to 1500rpm with constant load of 60N. It can be seen that as speed increases, the friction forc...

Source: Perspectives in Science - July 14, 2016 Category: Science Source Type: research