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Code of Federal Regulations Title 40. Protection of Environment § 40.86.508–78 Dynamometer

Current as of October 02, 2022 | Updated by FindLaw Staff

(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 m2 (4.31 ft2 ) 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):

Actual roll speed

Allowable cooling air speed

0 km/h to 5 km/h

0 km/h to 10 km/h.

5 km/h to 10 km/h

0 km/h to roll speed+5 km/h.

10 km/h to 50 km/h

Roll speed±5 km/h.

50 km/h to 70 km/h

Roll speed±10 pct.

Above 70 km/h

At least 63 km/h.

(e) The dynamometer shall comply with the tolerances in § 86.529.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment § 40.86.508–78 Dynamometer - last updated October 02, 2022 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-sect-40-86-508-78/

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