Commission Regulation (EC) No 692/2008Show full title

Commission Regulation (EC) No 692/2008 of 18 July 2008 implementing and amending Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information (Text with EEA relevance)

3.9.An addition to the requirements of Paragraph 1.3. of Appendix 8 to Annex 4, the following requirements shall apply:U.K.

Non-methane hydrocarbon concentration is calculated as follows:

CNMHC = CTHC — (Rf CH4 × CCH4)

where:

CNMHC

=

corrected concentration of NMHC in the diluted exhaust gas, expressed in ppm carbon equivalent,

CTHC

=

concentration of THC in the diluted exhaust gas, expressed in ppm carbon equivalent and corrected by the amount of THC contained in the dilution air,

CCH4

=

concentration of CH4 in the diluted exhaust gas, expressed in ppm carbon equivalent and corrected by the amount of CH4 contained in the dilution air,

Rf CH4

=

is the FID response factor to methane as defined in paragraph 2.3 of Annex 4-Appendix 6.