Road-load power, test weight, and inertia weight class determination.

(a) Simulate a vehicle's test weight on the dynamometer using the appropriate equivalent test weight shown in Table 1 of this section. Equivalent test weights are established according to each vehicle's test weight basis, as described in paragraph (b) of this section. Table 1 also specifies the inertia weight class corresponding to each equivalent test weight; the inertia weight class allows for grouping vehicles with a range of equivalent test weights. Table 1 follows: Table 1 of § 1066.805—Equivalent Test Weights (pounds) Test weight Equivalent test Inertia weight Up to 1062 1000 1000 1063 to 1187 1125 1000 1188 to 1312 1250 1250 1313 to 1437 1375 1250 1438 to 1562 1500 1500 1563 to 1687 1625 1500 1688 to 1812 1750 1750 1813 to 1937 1875 1750 1938 to 2062 2000 2000 2063 to 2187 2125 2000 2188 to 2312 2250 2250 2313 to 2437 2375 2250 2438 to 2562 2500 2500 2563 to 2687 2625 2500 2688 to 2812 2750 2750 2813 to 2937 2875 2750 2938 to 3062 3000 3000 3063 to 3187 3125 3000 3188 to 3312 3250 3000 3313 to 3437 3375 3500 3438 to 3562 3500 3500 3563 to 3687 3625 3500 3688 to 3812 3750 3500 3813 to 3937 3875 4000 3938 to 4125 4000 4000 4126 to 4375 4250 4000 4376 to 4625 4500 4500 4626 to 4875 4750 4500 4876 to 5125 5000 5000 5126 to 5375 5250 5000 5376 to 5750 5500 5500 5751 to 6250 6000 6000 6251 to 6750 6500 6500 6751 to 7250 7000 7000 7251 to 7750 7500 7500 7751 to 8250 8000 8000 8251 to 8750 8500 8500 8751 to 9250 9000 9000 9251 to 9750 9500 9500 9751 to 10250 10000 10000 10251 to 10750 10500 10500 10751 to 11250 11000 11000 11251 to 11750 11500 11500 11751 to 12250 12000 12000 12251 to 12750 12500 12500 12751 to 13250 13000 13000 13251 to 13750 13500 13500 13751 to 14000 14000 14000 (b) The test weight basis for non-MDPV heavy-duty vehicles is “adjusted loaded vehicle weight”. For all other vehicles, the test weight basis for establishing equivalent test weight is “loaded vehicle weight”. These load terms are defined in 40 CFR 86.1803. (c) For FTP, US06, SC03, New York City Cycle, HFET, and LA-92 testing, determine road-load forces for each test vehicle at speeds between 9.3 and 71.5 miles per hour. The road-load force must represent vehicle operation on a smooth, level road with no wind or calm winds, no precipitation, an ambient temperature of approximately 20 °C, and atmospheric pressure of 98.21 kPa. You may extrapolate road-load force for speeds below 9.3 mi/hr. [79 FR 23823, Apr. 28, 2016, as amended at 81 FR 74213, Oct. 25, 2016; 89 FR 18214, Apr. 18, 2024]