CFR 40-1048.505-2014 Protection of Environment. Part1048:Control of emissions from new, large nonroad spark-ignition engines. Section1048.505:How do I test engines using steadystate duty cycles, including rampedmodal testing?
This section describes how to test engines under steady-state conditions. Insome cases, we allow you to choose the appropriate steady-state duty cycle foran engine; you may also choose between discrete-mode and ramped-modal testing. In all cases, you must use the duty cycle you select in your application for certification for all testing you perform for that engine family. If we test your engines to confirm that they meet emission standards, we will use the duty cycles you select for your own testing. If you submit certification test data using more than one duty cycle, any of the selected duty cycles may be used for any subsequent testing. We may also perform other testing as allowed by the Clean Air Act.
CFR 40-1048.505-2014 history
2014CFR 40-1048.505-2014 Protection of Environment. Part1048:Control of emissions from new, large nonroad spark-ignition engines. Section1048.505:How do I test engines using steadystate duty cycles, including rampedmodal testing?