News extra: Euro-6 leaves the test-cell


 

Readers of a certain age may recall an astonishing episode in the US truck industry in 1998 when seven big engine manufacturers, including the likes of Caterpillar, Cummins, Detroit Diesel and Volvo were accused by the US government’s Environmental Protection Agency of “cycle-busting.” Put simply, the EPA alleged that engines’ electronic management systems had so-called “defeat devices” that meant the engines automatically adopted a different emissions strategy during the statutory type-approval emissions test cycle. The engines could meet the emission […]