A breakthrough in the management of diesel emissions has been announced today, enabling diesel cars to undercut future limits for nitrogen oxide (NOx) by almost 90 per cent.

Cars must currently emit no more than 168mg/km (milligrams per kilometre) of NOx and, in 2020, that limit will reduce to 120mg/km in real-world driving tests, and 80mg/km in lab assessments.

New Bosch tech drastically cuts diesel NOx emissions and allows a diesel VW Golf to emit just 13mg/km of NOx in mixed driving conditions, measured using the latest RDE paradigms.

The technology works by managing exhaust gas re-circulation and using optimised turbochargers. It is effective as soon as a car is started and works at all engine speeds, allowing it to operate effectively both when engines are cold, and during urban driving. The system is also effective when drivers accelerate quickly.

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