Środowisko i energia · 10.09.2004

Test Procedures for Testing Highway and Nonroad Engines and Omnibus Technical Amendments

This proposed regulation aims to revise and harmonize test procedures from the various EPA programs for controlling engine emissions. It will not address emission standards, nor is it intended to change the emission reductions expected from these EPA programs. Rather, it proposes to amend the regulations, which contain laboratory specifications for equipment and test fuels, instructions for preparing engines and running tests, calculations for determining final emission levels from measured values, and instructions for running emission tests using portable measurement devices outside the laboratory. These regulations currently apply to land-based nonroad diesel engines, land- based nonroad spark-ignition engines over 19 kilowatts, and recreational vehicles. These proposed revisions will update the regulations to deal more effectively with the more stringent standards recently promulgated by EPA and will also clarify and better define certain elements of the required test procedures. In particular, the proposed amendments will better specify the procedures applicable to field testing under the regulations. This action also proposes to apply the regulations to highway heavy-duty dies