Study of Important Performance Characteristics of Commercially Available Two and Four Stroke Engine Lubricants

摘要

Background/Objectives: In this paper, a complete study and experimentation of engine lubricants or engine oils with the help of viscosity grades through the mathematical formulas and experimental data having different viscosity grade of lubricants at different temperature. Methods/Statistical Analysis: For analyze the viscosity, density and thermal conductivity with the assistance of Redwood viscometer, Hydrometer and Transient hot-wire method, and reciprocal of thermal conductivity (k) is called thermal resistivity (r). Engine oils 10W40, 10W30, and 15W40 are selected for testing. Findings: in these different types of engine oil tests, four parameters (viscosity, thermal conductivity (k), density, thermal resistivity and 126 experiments were performed with four different temperature 30°C, 40°C, 50°C, and 60°C, which shows the comparisons of different engine lubricants at same viscosity grade. Applications: The oil lubrication pollution against the motor part wear, leading the loss of engine performance and life, the dynamic engine oil or lubricant oil films confine moving portion surfaces cause a the significant bit of the engine wear. In the engine lubrication system, viscosity plays important role, wearing of the automated parts. There are different lubricants are in market having different viscosity grades. A mechanical or automated engine is a completed machine; it comprises of several moving parts. The moving part of the automated or mechanical engine is driven under different temperature and pressure ranges to reduce the friction or erosion and control wear. Engine oil plays the important role, so the oil action and specifications reduce the friction or erosion and control the engine wear behavior, the viscosity is one of the most important parameter of the engine oil specifications, the viscosity comprises and shows the number of forces or power between the oil particles.