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Division 2 Calculation of the gas energy ratioF1

Original text. Later amendments are not shown.

The fuel consumption value shall be calculated from the emissions of hydrocarbons, carbon monoxide, and carbon dioxide determined from the measurement results assuming that only the gaseous fuel is burned during the test.

The gas ratio of the energy consumed in the cycle shall be determined using the following equation:

Ggas=Mgas×cf×104FCnorm×dist×ρ

where:

Ggas

  • is the gas energy ratio, per cent;

    • Mgas

  • is the mass of the gaseous fuel consumed during the cycle, kg;

    • FCnorm

  • is the fuel consumption (l/100 km for LPG, m3/100 km for NG/biomethane) calculated in accordance with paragraphs 6.6. and 6.7. of Sub-Annex 7;

    • dist

  • is the distance recorded during the cycle, km;

    • ρ

  • is the gas density:

    • ρ = 0,654 kg/m3 for NG/Biomethane;

    • ρ = 0,538 kg/litre for LPG;

    • cf

  • is the correction factor, assuming the following values:

    • cf = 1 in the case of LPG or G20 reference fuel;

    • cf = 0,78 in the case of G25 reference fuel.

    • Annotations

    Textual amendments

    F1

    Substituted by Commission Regulation (EU) 2018/1832 of 5 November 2018 amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) 2017/1151 for the purpose of improving the emission type approval tests and procedures for light passenger and commercial vehicles, including those for in-service conformity and real-driving emissions and introducing devices for monitoring the consumption of fuel and electric energy (Text with EEA relevance).