Surface characterization of a real-world cylinder liner subject to deposition from combustion
conference contributionposted on 16.10.2018 by Rickie Bewsher, Michael Leighton, Mahdi Mohammadpour, Gunter Offner, O. Knaus
Any type of content contributed to an academic conference, such as papers, presentations, lectures or proceedings.
This paper investigates the effects of combustion product deposition using a cylinder liner taken from a C-segment passenger vehicle run for 105,000 miles. Using a novel methodology of Atomic Force Microscopy and X-ray Photoelectron Spectroscopy the pressure coefficient of boundary shear strength of asperities and the nature of the depositions along the liner is considered to predict the boundary friction of a piston ring pack. Results show that the combustion depositions create localized values of the pressure coefficient of boundary shear strength of asperities at top dead centre, mid-stroke and bottom dead centre, increasing ring pack friction by 50 N in the combustion stroke per engine cycle.
- Mechanical, Electrical and Manufacturing Engineering