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| Document Title | Proposal for amendments to documents GRPE/2012/7 and GRPE/2012/6 | ||||||||
| Reference Number | GFV-21-02 | ||||||||
| Date |
1 Jun 2012
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| Summary | Copy of the GRPE submission prepared by the GFV Chair of the informal group to correct a measurement error contained in documents GRPE/2012/6 (concerning UN R83) and GRPE/2012/7 (concerning UN R115) when weighing method and G25 reference fuel are used. | ||||||||
| Rulemaking Area(s) | UN R83 Motor Vehicle Emissions and UN R115 LPG/CNG Retrofit Systems | ||||||||
| Meeting(s) | |||||||||
| Downloads | |||||||||
| UNECE server | .pdf format | ||||||||
| Excerpts from session reports related to this document | |||||||||
| GFV | Session 21 | 5 Jun 2012 |
View on GRPE formal documents for R83 and R115 (highlight discussion at GFV-20 and anticipated at GRPE-64). With respect to informal documents on which the two formal ones are based, in line with comments received in GRPE-63rd and as agreed by the group in GFV-18th, only that concerning R 115 has been subject to a significant modification: new requirements for petrol use in the gas mode have been restricted to direct injection petrol engines. GFV-21-02 aims at introducing a mass correction factor for CNG reference fuel G25 in both documents ECE/TRANS/WP.29/GRPE/2012/6 and /7. A minor correction for the formulae used in both documents and for both gaseous fuels is highlighted: the proposed requirements make reference to gas ratios in percentage while the formulae generate decimal numbers. Attendees agree to correct the formulae making them consistent with the related requirements. Mr. Piccolo commits to drafting a proposal to be circulated to the group for final approval before tomorrow. |
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