4.7.2. Proposal for Supplement 9 to the 06 series of amendments to UN Regulation No. 49 (Emissions of compression ignition and positive ignition (LPG and CNG) engines)
UN R49: Proposal for Supplement 9 to the 06 series of amendments
Reference Number: WP.29/2024/46
Proposal to permit the use of hydrogen (H2) as fuel for emissions type-approval of heavy duty vehicles and to introduce an option to measure the total hydrocarbon (THC) emissions instead of measuring the non-methane hydrocarbon emissions in certain cases.