Injection Spray Comparison of Diesel Fuel and Cold Pressed Rape Seed Oil Fuel

Diesel Engines are a popular propulsion not only for on-highway vehicles but also for working machines like agricultural tractors. In this application it is also common to use other fuels than Diesel. One of this fuels is cold pressed rape seed oil. However, this vegetable oil has different physical properties than diesel fuel. This leads to different spray behaviour in an internal combustion engine and subsequently to other emission levels. In this study the spray-patterns of a Diesel fuel CR-Injector are compared to spray-patterns of cold pressed rape oil with the same injector. The results are linked to engine emissions detected on an engine test bench.