Traditional diesel fuel is highly efficient, but also known as a notoriously dirty pollutant. Clean diesel refers to a new approach to diesel fuel, which creates a new cleaner version of diesel fuel, along with an accompanying emission control system. The goal behind this technology is to harnesses the benefits of diesel efficiency, while remaining environmentally friendly. Below, we explore what this new technology is, how it works, as well as the pros-and-cons.
Clean diesel technology (also called Ultra Low Sulfur Diesel or ULSD vehicles) refers to an overall approach in modern diesel vehicles that combines Ultra Low Sulfur Diesel fuel, with new highly efficient diesel engines, and emission control measures. The result of clean diesel technology is an generally low emission and highly fuel efficient producing engine. Ultra Low Sulfur Diesel fuels are able achieve drastically reduced sulphur contents by refining out much more of the particulates that are present in older diesel fuels.
Sulphur, which is a natural part of crude oil from which diesel fuel is derived, is one of the key causes of particulates or “soot” emitted from diesel exhaust.
Particulates are the main culprit of diesel engines' black exhaust pollutants.
Clean diesel technology aims to drastically reduce the “soot” output of diesel engines by using Ultra Low Sulfur Diesel fuels, modern highly efficient engines, and stringent emission control measures. One might ask "if diesel is such a natural polluter as-is, why go through the hassle to clean it up so much?" The answer lies in the fact that diesel has the highest energy density among all commonly used transportation fuels, which equates to more energy per gallon than its alternatives.
Both gasoline (petrol) and diesel fuels are used in internal combustion engines for the conversion of chemical energy into mechanical energy. The primary difference between the two is the way fuel in which combustion is accomplished: