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Supplemental WHTC testing for Euro IV/V heavy-duty vehicles in China

China’s Ministry of Environmental Protection (MEP) has issued a new, nationwide standard requiring China IV and V (equivalent to Euro IV and V) heavy-duty diesel engines for use in urban vehicles to...
Published 2014.02.03: Publication

Urban off-cycle NOx emissions from Euro IV/V trucks and buses

Despite meeting more stringent regulatory standards for exhaust emissions during type approval, many Euro IV and Euro V heavy-duty vehicles equipped with selective catalytic reduction (SCR) systems...
Published 2012.04.10: Publication

In-use Testing for CO2 and Fuel Economy in the United States

  China is considering including an after-production conformity test as part of China’s Phase 3 passenger car fuel consumption standard implementation and enforcement plan and is looking for...
Published 2012.03.09: Publication

Inertia classes proposal

Historically the weight of a vehicle was represented by hanging rotating inertia mass on a dynamometer. This approach required the use of discrete inertia classes and an upper limit for inertia mass...
Published 2011.06.17: Publication

Inertia classes in worldwide harmonized light vehicle test procedure (WLTP) development

The definition of vehicle weight used for testing procedures is an important decision when drafting the regulation on determining emission values under the WLTP. Currently, different inertia class...
Published 2011.05.18: Publication