Injection, combustion, and engine emissions characteristics form preheated vegetable oils

Abstract

Use of vegetable oils in diesel engines has gained increasing interests due to increased pollution problem
and reduced petroleum resources. Major disadvantage of vegetable oil is that its viscosity is higher than
diesel, leading to poor fuel spray and injection, and incomplete combustion. To reduce the viscosity of the
oils, preheating method is applied. This review paper presents about effect of preheated plant oils on change
in injection, spray, combustion, performance, and emissions of diesel engines, obtained from critical review
of previously published literature. The major findings are injection timing retards, ignition delay reduces,
combustion duration increases, thermal efficiency increases, fuel consumption decreases, and engine
emissions deceases to compare with non-preheating oils.