Volume 48, No 1, 2026, Pages 166-187

Download full text in PDF

Tribological and Performance Analysis of a 4-Stroke Diesel Engine Employing Reduced Graphene Oxide Additive Added into Engine Oil

Authors:

Emrullah Hakan Kaleli , Levent Yüksek ,
Selman Demirtas

DOI: 10.24874/ti.2119.01.26.03

Received: 21 January 2026
Revised: 24 February 2026
Accepted: 6 March 2026
Published: 15 March 2026

Abstract:

As the tribological behaviour of a commercialized, fully synthetic 5W40 engine oil upon the incorporation of reduced graphene oxide in sample (0.02 wt.%) like (5W40 engine oil+ 0.02 wt.% Reduced Graphene Oxide) called rGO6 presented superior tribological properties by exhibiting the lowest COF value in our previous work, the same sample was evaluated through a reciprocating tribometer, using steel ball (100 CR6) on a real polished Diesel engine cylinder liner with 5W-40 engine oil to investigate their wear and friction behaviour in boundary lubrication regime. Successful dispersion stability of engine oil added with graphene was also evaluated through an engine dynamometer test. It was found that a rGO6 nano-additive played an active role in lowering the coefficient of friction (%3.29) and increased surface protection by forming a protective layer on a smooth nanorough on rubbing surfaces in both triple repeated tribometer and engine tests increasing engine power by %13.51 and engine torque by %12.00.

Keywords:

Friction, Roughness, Reduced graphene oxide, Diesel engine

Announcements

RSS Feed