UN Regulation No. 143: Heavy-Duty Dual Fuel Retrofit Systems

Uniform provisions concerning the approval of Heavy Duty Dual-Fuel Engine Retrofit Systems (HDDF-ERS) to be installed on heavy duty diesel engines and vehicles

Related groups: GFV, GRPE, and HDDF
UN R143 (2017)
18 Jul 2017 2017-08-15 11:14:42 UTC 00 series of amendments Based upon the adopted proposal: WP.29/2016/110

Proposal for a new Regulation on uniform provisions concerning the approval of Heavy Duty Dual-Fuel Engine Retrofit Systems (HDDF-ERS) to be installed on heavy duty diesel engines and vehicles. Please note that Japan notified the UN Secretary-General on 1 February 2017 of its intention not to apply this regulation from the date it enters into effect (June 2017). Japan remains free to adopt the regulation at a later date.

UN R143 | Amendment 1 (2018)
27 Apr 2018 2018-05-10 08:42:36 UTC 1 00 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2017/66

Proposal to restrict the application of CO2 specific emission limits only to NMHC and CO emissions (back-to-back comparison of NOx and PM to apply under the regulation in any case). The proposal also aligns the text where applicable with the intent of paragraph 2.3.15.: “R49 original emission limits” means the emission limits as defined in Regulation No. 49 to which the original engine system was approved."

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