40 CFR 1066.805 - Road-load power, test weight, and inertia weight class determination.

View all text of Subpart I [§ 1066.801 - § 1066.845]

§ 1066.805 - Road-load power, test weight, and inertia weight class determination.

Link to an amendment published at 89 FR 28214, Apr. 18, 2024.

(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, SFTP, 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]