New regulations that come into effect next year in the US to reduce harmful vehicle emissions and lower the sulphur content of fuel will be challenging to meet

Manufacturing new emission control catalysts
Manufacturing new emission control catalysts

Johnson Matthey realised at an early stage that developing new technology capable of reducing emissions of oxides of nitrogen (NOx) at very low temperatures could be key to helping our customers meet the new regulations.

Collaborating with our customers

This is the kind of challenge our R&D teams thrive on. By collaborating on a project with our customers, Johnson Matthey has exceeded expectations with its new diesel Cold Start Concept (dCSC™) catalyst.

Catalytic emission control systems are highly efficient when they are running at their operating temperature (typically above 200ºC) but problems can arise at lower temperatures or during the so-called 'cold start' phase, when the engine is first turned on. Johnson Matthey's new dCSC™ catalyst adsorbs NOx and hydrocarbons during the cold start period and releases them once the rest of the emission control system has warmed up.

During tests, vehicles using this technology comfortably achieved the required standard, demonstrating a fuel economy of 26 miles per gallon (mpg) in the city and 36 mpg on the highway, yielding a corporate average fuel economy (CAFE) improvement of 60% over the gasoline equivalent and well exceeding the 40% improvement target expected.

Clean diesel without compromise

The dCSC™ catalyst will also help enable future diesel vehicles to achieve stringent emission standards around the world without compromising on fuel economy. For example, Johnson Matthey has also used this technology as a key component in an advanced emission control system to demonstrate the potential to meet the ultra low NOx regulations which California is considering introducing for on road heavy duty diesel vehicles by 2023.

Working closely with our customers helped make the project a success, opening up possibilities for the adoption of this technology in future commercial applications and reaffirming our reputation for emission control innovation.