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Division 8.1.1 Initial load setting

Original text. Later amendments are not shown.

For a chassis dynamometer with coefficient control, the chassis dynamometer power absorption unit shall be adjusted with the arbitrary initial coefficients, Ad, Bd and Cd, of the following equation:

Fd=Ad+ Bdv+ Cdv2

where:

Fd

  • is the chassis dynamometer setting load, N;

    • v

  • is the speed of the chassis dynamometer roller, km/h.

    • The following are recommended coefficients to be used for the initial load setting:

    1. (a)

      F1Ad = 0,5 × At, Bd = 0,2 × Bt, Cd = Ct

      for single-axis chassis dynamometers, or

      Ad = 0,5 × At, Bd = 0,2 × Bt, Cd = Ct

      for dual-axis chassis dynamometers, where, and are the target road load coefficients;

    2. (b)

      empirical values, such as those used for the setting for a similar type of vehicle.

    For a chassis dynamometer of polygonal control, adequate load values at each reference speed shall be set to the chassis dynamometer power absorption unit.

    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).