Abstract
On a global scale, environment concern, energy saving and reduction of air pollution will be major guidelines for automotive industry during the following decades of the next millennium. The automotive industry is undergoing dramatic changes. The more and more stringent legislation concerning vehicle exhaust emissions require constant improvement of the technology to produce cleaner fuel and more economic vehicles.
In spite of its superiority over the petrol engine in respect of the fuel consumption, a diesel engine "suffers" from increased exhaust emissions, particulate and NOx above all, and also from the noise and vibrations.
The paper gives a review of the effect of sulfur and aromatics interaction affecting DI diesel engine emissions particularly particulate and NOx emissions. Test results show that diesel engine particulate emissions as well as NOx emissions are the mostly affected by the sulfur content in fuel and then by aromatic content. Such effect is not simple, on the contrary it is very complex.