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e-CFR data is current as of September 17, 2020

Title 40Chapter ISubchapter UPart 1066Subpart I → §1066.805


Title 40: Protection of Environment
PART 1066—VEHICLE-TESTING PROCEDURES
Subpart I—Exhaust Emission Test Procedures for Motor Vehicles


§1066.805   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 weightEquivalent testInertia weight
Up to 106210001000
1063 to 118711251000
1188 to 131212501250
1313 to 143713751250
1438 to 156215001500
1563 to 168716251500
1688 to 181217501750
1813 to 193718751750
1938 to 206220002000
2063 to 218721252000
2188 to 231222502250
2313 to 243723752250
2438 to 256225002500
2563 to 268726252500
2688 to 281227502750
2813 to 293728752750
2938 to 306230003000
3063 to 318731253000
3188 to 331232503000
3313 to 343733753500
3438 to 356235003500
3563 to 368736253500
3688 to 381237503500
3813 to 393738754000
3938 to 412540004000
4126 to 437542504000
4376 to 462545004500
4626 to 487547504500
4876 to 512550005000
5126 to 537552505000
5376 to 575055005500
5751 to 625060006000
6251 to 675065006500
6751 to 725070007000
7251 to 775075007500
7751 to 825080008000
8251 to 875085008500
8751 to 925090009000
9251 to 975095009500
9751 to 102501000010000
10251 to 107501050010500
10751 to 112501100011000
11251 to 117501150011500
11751 to 122501200012000
12251 to 127501250012500
12751 to 132501300013000
13251 to 137501350013500
13751 to 140001400014000

(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]

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