GAR | GRPE/2017/4

1	2	3	4	5	6	7	8	9	10
Document Title	Proposal for a Supplement to the draft 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
Reference Number	GRPE/2017/4
Date	27 Oct 2016
Summary	During the June 2016 GRPE session, AEGPL raised concerns regarding the back-to-back approach for the simplified test of retrofitted dual-fuel engines because, in some cases, the hydrocarbons (HC) and/or carbon monoxide (CO) emission values of the original diesel engine are far below the emission limit (see GRPE-73 session report, para. 28). AEGPL proposed a solution in document GRPE-73-07. However the Netherlands is concerned that: The emission performance of the selected diesel engine is not known (above or below the emission limit and how far from the limit); Non-methane hydrocarbons (NMHC) emission cannot be disregarded because NMHC is an important air quality regulated pollutant emission; and The diesel emissions of CO and HC could be far below the emission limit and hence a factor of two would not be sufficient while increasing this factor is problematic. Contracting Parties and stakeholders have discussed a solution, presented in this proposal, to compare measured emissions of a retrofitted dual-fuel engine with the brake specific emission limits using a CO2 specific emissions approach. This proposal would amend the draft regulation pending before WP.29 (document WP.29/2016/110).
Source(s)	Netherlands
Rulemaking Area(s)	UN R143 HD Dual Fuel Retrofit Systems
Proposal Status	Superseded
Meeting(s)	GRPE \| Session 74 \| 10-13 Jan 2017 8. Draft 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
Related Documents
	GRPE-74-25		Proposal for amendments to ECE/TRANS/WP.29/GRPE/2017/4 on Heavy Duty Dual-Fuel Engine Retrofit Systems (superseded)
	WP.29/2017/66		Proposal for Supplement 1 to the original version of Regulation No. 143
Downloads
UNECE server	.pdf format		.docx format