The European Parliament’s Environment Committee has backed an easing of the proposed NOx limits for heavy vehicles in Euro VI emissions specifications from 0.4 g/kWh to 0.5 g/kWh. The new limit represents a 75% reduction compared to the Euro V specifications that will come into effect next year. The prior limit represented an 80% reduction.
The US EPA 2010 heavy-duty limit on NOx is 0.27g/kWh (0.2 mg/bhp-hr)—approximately 85% below Euro 5 (although different test cycles make absolute comparisons difficult.)
Euro V limits will replace the current Euro IV limits in 2009. The Environment Committee pushed compliance with Euro VI to 1 January 2014—three months earlier than the proposal from the European Commission, but nine months later than originally proposed.
New types of vehicles would have to meet the standards one year earlier. The committee asked the Commission to adopt the associated technical regulation by the end of 2009, after which manufacturers will have 48 months to make the necessary technical changes to the vehicles.
The committee also rejected amendments by the rapporteur that would have reduced the particle mass limit to 5 mg/kWh. Instead, they backed the Commission proposal of 10 mg/kWh—a 66% reduction compared with Euro V.