In this study, construction and standardization of a track for performing fatigue and reliability tests of light commercial vehicles are described. Such a test track is necessary for design and manufacturing verification of these vehicles. Fatigue characteristics of Turkish roads were determined by analyzing fifty different roads. This paper focuses on defining the load spectrum and equivalent fatigue damage of the leaf spring resulting from accelerated tests on a route. Fatigue analysis and estimated lifetime of the part were calculated using Finite Element Analyses and verified by the Palmgren-Miner rule. When as customer profile the Turkish automotive user is taken into consideration and accelerated test tracks are designed for the reliability and fatigue tests of the related company, linear FEA of the spring represents a convenient procedure.
The production of biodiesel as an alternative fuel and its use as a mixture and other additives are presented. In the present research work, additive blends with diesel biodiesel from algae oil are physically characterised and an analysis of pollutant emissions is carried out when used in an ignition engine by compression. The measurement of pollutant emissions is carried out through a combined emission analyzer adapted to a system of valves attached to the experimental facility. The properties of each mixture with the polluting emissions are compared with that of the reference diesel. It was found that each of the properties improves compared to that of diesel, reducing most emissions in the use of mixtures with biodiesel.
In this study, an accelerated test track construction necessary during research and development phase of light commercial vehicles (LCV) is described. By the questionary method, the Turkish customer automotive usages are defined. This paper focuses on defining load spectrum affected by driving shaft torque during acceleration, breaking and different manoeuvres and equivalent fatigue damage of the driving shaft resulting from accelerated tests on a route. Fatigue analysis and estimated lifetime of the part were calculated using finite element analyses (FEA) and verified by the Palmgren-Miner rule. When as customer profile the Turkish automotive user is taken into consideration and accelerated test tracks are designed for reliability and fatigue tests of the related company, linear FEA of the driving shaft represents a convenient procedure.
Abstract-In this study, a questionnaire was used to determine the average customer usage of the light commercial vehicles in Turkey. Approximately on 50 road routes and on rough roads in Turkey, the fatigue characteristics of the road profiles were measured by a many sensors equipped on LCV (Light Commercial vehicle).This article focuses on defining the general load spectrum of Turkey roads belong to the driving shaft. Rain-flow statistical counting method was applied driving shaft's signals in order to make fatigue comparisons meaningfully and other application. Fatigue analysis of the driving shaft according to MP (Turkish mission profiles) were calculated by using FEA (Finite Element Analysis) and verified by the Palmgren-Miner rule.
Numerous Algae oils with low and medium viscosity were investigated as fuel for CI engines. However, high viscous algae oil has not been explored in detail as a replacement for diesel in CI engines due to operational problems and poor performance characteristics. Esterification of neat algae oil to obtain its biodiesel is a complex process. The biodiesel obtained also has viscosity nearly five times more than diesel viscosity. Hence, research efforts on CI engines using algae oil methyl ester are lacking, particularly in combustion characteristics. This work focuses on utilizing algae oil as a fuel in CI engines. Algae oil has more affinity for alcohols due to a higher percentage of ricinoleic acid which aids in forming a homogeneous mixture. Alcohols with better fuel properties improve the combustion capability of algae oils with low and medium viscosity. However, not much research has been carried out in alcohols with very high viscous algae oil. Hence, in this work, higher and lower-order alcohols were blended with algae oil in their neat form and their biodiesel with Al2O3 nanoadditives for performance improvement.
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