Diesel technology is continuously being improved. Low-emission diesel engines in passenger vehicles, trucks and buses use low-sulfur diesel fuels and specialized catalytic converters, advanced soot filters, and other devices to cut down or eliminate harmful emissions.
A 3 part system
European vehicle manufacturers and their suppliers lead the world in the development of state-of-the-art diesel engine technology. Clean diesel is a new generation of diesel made up of a three-part system.
Highly efficient diesel engine
Ultra-low sulfur diesel
Advanced emissions controls
Vehicle emissions catalytic converters include exhaust system-related catalysts (substrates with incorporated or coated catalytic materials), catalysed particulate filters, and ancillaries such as emissions adsorbers. The latest generation of these products converts up to 99% of combustion engine exhaust pollutants (HC, CO, NOx and particulates). Diesel cars have 15% lower CO2 emissions per kilometre than equivalent petrol-powered vehicles.
What is EURO 6?
Clean diesel complies with the latest EU emissions legislation – Euro 6 – which is amongst the strictest in the world.
As of 1 September 2015, all new cars sold meet Euro 6 standards
Real-world emissions testing of cars is required for the first time
New trucks and buses already deliver real-world emissions reductions
Since 1992, the EU has introduced increasingly stricter limits on vehicle emissions through a series of ‘Euro’ standards. The latest and most stringent of these standards is Euro 6. New car models have complied with Euro 6 since September 2014, and all new cars sold since September 2015 must meet this standard. Over the last 15 years, nitrogen oxides (NOx) limits for diesel car engines have been reduced by 84%, and particulates (PM) by 90%.
Since 1 September 2017 a Not-To-Exceed (NTE) emissions limit is set for Real-Driving Emissions (RDE) of new car models with a Conformity Factor (i.e. NTE/Euro 6 limit ratio) of 2.1 for NOx emissions. This is called the Euro 6d-TEMP standard. It will apply to all new cars in September 2019.
From January 2020/21 for new models and all new cars respectively, the NOx CF will be lowered to 1.43 (being 1.0 + error margin of 0.43, and the error margin is to be reviewed). This is called the Euro 6d standard.
A CF for Particle Number also entered into force in September 2017 for new car types as 1.5 (1.0 + error margin of 0.5 to be reviewed). It has applied to all new cars since September 2018.