About 53 percent of new vehicles in Europe are diesel-powered. Clean diesel-powered vehicles have been utilized in Europe as a practical solution for years. Proven, efficient and durable technology have led diesel vehicles to 23 percent share worldwide.

Diesel development dates back to the 1890s, when Rudolf Diesel licensed and patented his compression start engine. The first production diesel cars were the Mercedes-Benz 260D and the Hanomag Rekord introduced in 1936. Fuel injection has evolved over the years with the introduction of mechanical, electronic, indirect and direct injection.

Modern clean diesel engines are advanced technological innovations. One of the most integral new components of the clean diesel engine is the particulate filter. The filter is responsible for collecting the soot from the exhaust fumes, and when it builds up to a certain point, the injectors shoot more fuel into the engine, which causes filter heat to burn up soot particles before exhaust gas is emitted through the tailpipes.

Other clean diesel technological advancements include electronic engine control modules to regulate functions, turbochargers to increase the performance and efficiency of the engine, and improved isolation strategies to quiet the noise from the whole process.