40 CFR 86.508-78

§ 86.508-78 Dynamometer.

United States · 40 CFR — Protection of Environment · Status: effective

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Citation: 40 CFR 86.508-78, § 86.508-78 Dynamometer, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/179772
Permanent ID: ys:prov:179772@1
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Full text

(a) The dynamometer shall have a single roll with a diameter of at least 0.400 metre. (b) The dynamometer shall be equipped with a roll revolution counter for measuring actual distance traveled. (c) Flywheels or other means shall be used to stimulate the inertia specified in § 86.529. (d) A variable speed cooling blower shall direct air to the vehicle. The blower outlet shall be at least 0.40 m 2 (4.31 ft 2) and shall be squarely positioned between 0.3 m (0.98 ft) and 0.45 m (1.48 ft) in front of the vehicle's front wheel. The velocity of the air at the blower outlet shall be within the following limits (as a function of roll speed): (e) The dynamometer shall comply with the tolerances in § 86.529.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.