European emission regulations for new heavy-duty diesel engines

The regulations were originally introduced by the Directive 88/77/EEC, followed by a number of amendments. In 2005, the regulations were re-cast and consolidated by the Directive 05/55/EC. Beginning with the Euro VI stage, the legislation became simplified, as “directives”—which need to be transposed into all of the national legislations—were replaced by “regulations” which are directly applicable. The following are some of the most important rulemaking steps in the heavy-duty engine regulations:

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