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Informal Group on Gaseous Fuelled Vehicles (GFV)

This informal document presents key discussions and outcomes from the 9th and 10th GFV meetings in 2010. Topics include NMHC and CH4 control, retrofitting NG vehicles, dual-fuel HDVs, and mixed-fuel LDVs. The report details evaluation studies on CH4 conversion factors, legal considerations, and proposed actions for future research and development. It also covers ongoing activities to update the R.115 regulation and clarify applicability for Euro 5 vehicles. The document outlines the need for investigating dual-fuel types and test procedures for HD vehicles and proposes a task force for this purpose. Additionally, it highlights the emerging interest in mixed-fuel LDVs and the proposed calculations for THC and CO2 emissions. The report concludes with plans for upcoming GFV meetings in October 2010 and emphasizes the importance of continuous discussions and collaborations within the group.

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Informal Group on Gaseous Fuelled Vehicles (GFV)

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  1. Informal document No. GRPE-60-20 (60th GRPE, 7-11 June 2010, agenda item 6.2) Informal Group on Gaseous Fuelled Vehicles (GFV) Report to 60th GRPE June 2010

  2. Meetings GFV Group • 9th GFV meeting • 28 April 2010 Brussels (CLEPA) • 10th GFV meeting • 08 June 2010 Geneva

  3. Agenda items GFV • NMHC + CH4 versus THC in R.115 • Retrofitted NG vehicles • Dual-fuel (diesel-gas) HDV • Test requirements R.49 (OEM) • Requirement R115 (retrofit) • Mixed-fuel (petrol-gas) LDV • Improvements of R.115

  4. NMHC + CH4 versus THCRetrofitted NG vehicles • CH4 correction factor for Retrofit NGV justified? • 2 small evaluation studies performed : • TNO: 4 vehicles – JRC: 2 vehicles • To determine the CH4 conversion of • a methane optimized catalyst • a petrol optimized catalyst

  5. Result test programme • CH4 efficiency Methane Catalyst: ~ 97% • CH4 efficiency Petrol Catalyst: ~91% • Average K factor = ~0.31 • Applicablility under consideration • Legal aspects EC

  6. Dual-Fuel (diesel-gas) HDV • Growing interest for Dual-Fuel HDV • Workshop 30-31 March 2010 Brussels • OEM requirements  R.49 • Retrofit provisions  R.115 and R.49 • Dual Fuel approaches for NRMM • Proposed actions in GFV group: • Investigation of the different Dual-Fuel types and test-procedures needed • Task-force for HD-DF • starting with R.49 • Parallel provisions for R.115 will be investigated to.

  7. Mixed-fuel (petrol-gas) LDV • No emission requirements for petrol-gas (bi-fuel) vehicles who can use gas and petrol not only separately but also at the same time: “mixed fuel types”. • First proposal for the calculation of THC and CO2 emissions. • A special task-force will investigate technologies and test procedures

  8. Improvements R115 • Ongoing activity in the GFV group to update and improve the R.115 text. • A separate proposal for clarification in R115 concerning the applicability of Euro 5 TA vehicles was tabled in the 10th GFV. • In existing situation will R.115 suppl. 4 (retrofit) be applicable for Euro 5 from august 2010. • The proposal for more clarification resulted in a fundamental discussion on retrofit versus OEM gas vehicle solutions of Euro 5 vehicles. • Discussion will continue in GFV group

  9. Next GFV-meetings • GFV meeting planned in October 2010 (no date/place confirmed yet) • Request for a half-day meeting in conjuncting with 61th GRPE. --------------

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