§ 1036.635 Certification requirements for high-GCWR medium-duty vehicles.

Engines that will be installed in Vehicles at or below 14,000 pounds GVWR that have GCWR above 22,000 pounds may be optionally certified under this part instead of vehicle certification under 40 CFR part 86, subpart S.

(a) Affected engines must meet the criteria pollutant standards specified in § 1036.104. The following specific provisions apply if engines are exempt from greenhouse gas standards under paragraph (b) or (c) of this section:

(1) Determine brake-specific CO₂ emissions over the FTP, e_CO2FTPFCL, from the emission-data engine used for demonstrating compliance with criteria pollutant standards. You may alternatively determine e_CO2FTPFCL based on chassis testing as described in 40 CFR 86.1845-04(h)(6). Use e_CO2FTPFCL for calculating emission rates from in-use engines under § 1036.530. Report the measured CO₂ emission rate and the method of testing in your application for certification.