Uniform Provisions Concerning the Approval of Internal Combustion Engines or Electric Drive Trains Intended for the Propulsion of Motor Vehicles of Categories M and N with regard to the Measurement of the Net Power and the Maximum 30 Minutes Power of Electric Drive Trains

Related groups: GRPE
UN R85 | Revision 1 (2013)
21 Aug 2013 2013-08-22 16:30:45 UTC 1 00 series of amendments | Supplement 1 00 series of amendments | Supplement 2 00 series of amendments | Supplement 3 00 series of amendments | Supplement 4 00 series of amendments | Supplement 5 00 series of amendments | Supplement 6
UN R85 | Revision 1 | Amendment 1 (2016)
11 Jul 2016 2016-07-13 11:18:43 UTC 1 1 00 series of amendments | Supplement 7 Based upon the adopted proposal: WP.29/2015/102

Proposal to avoid a redundant correction of the measured engine power of supercharged and turbocharged engines fitted with a self-correcting system for ambient conditions such as temperature and altitude. The current correction factor may yield inaccurate results for such configurations.

UN R85 | Revision 1 | Amendment 2 (2019)
16 Jan 2019 2019-01-25 10:34:38 UTC 1 2 00 series of amendments | Supplement 8 Based upon the adopted proposal: WP.29/2018/50

Proposal to clarify the wording of the determination of the net power for electric motors and to correct an error in the formula presented in paragraph 5.4.2. Diesel engines – Factor αd. The parameter “fm” in the equation should be a superscript (e.g., meaning “to the power of fm”). Through a transcription error, this factor was rendered in normal text.

UN R85 | Revision 1 | Amendment 3 (2020)
20 Jan 2020 2020-03-02 17:39:52 UTC 1 3 00 series of amendments | Supplement 9 Based upon the adopted proposal: WP.29/2019/44

Proposal to reduce testing burdens by introducing an alternative test method to “decrease the charge air cooler outlet temperature by the same amount that the ambient conditions for the vehicle test varied from the standard temperature.” This aligns with SAE J1349, “9.3 Application of Vehicle Transient Data to Net Power Test.”

Earlier texts may be available through the UN Official Document System.