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Eco-innovative technologies reducing CO2 emissions of light-duty vehicles
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Eco-innovative technologies reducing CO2 emissions of light-duty vehicles

Evaluation of interactions

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Article 11 of Regulation (EU) 2019/631 [1] provides a possibility for manufacturers of passenger cars and light commercial vehicles to take into account CO2 savings from innovative technologies, which cannot be fully quantified when using the standard emission test procedure (currently WLTP) for meeting their specific CO2 emission targets. Such ’eco-innovations’ have to be approved by the Commission on the basis of an application by one or more vehicle manufacturers and/or component suppliers. If more than one technology is installed on a vehicle, the combined CO2 savings may be less than the sum of the individual savings because the functioning of the one has an effect on the other. This effect is referred to as an ‘interaction’. Where such an interaction cannot be ruled out, the vehicle manufacturer shall indicate any form of interaction both at the stage of the application submission and at the stage of type approval. This report introduces two methods to determine the interaction, i.e. a “Combined” and a “Separated” method. Both methods yield the same results in the example case. The interaction has been detailed by calculating the CO2 savings of vehicles with two eco-innovations installed according to both methods. In particular, the combination of efficient alternator/motor-generator and exterior LED lighting eco-innovations has been considered. The interaction between the technologies studied in this report ranged from 0 to 7% of reduction of independent CO2 savings from both technologies. As an alternative to the detailed calculation method, this report introduces the use of pre-defined interaction reduction coefficients (PIRCs). Annex 1 to this report provides the background information and parameter used for equations and numerical examples.
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ISSN 1831-9424
ISBN 978-92-76-45459-5
DOI 10.2760/258688
Katalognummer KJ-NA-30930-EN-N
ISSN 1018-5593
ISBN 978-92-76-45461-8
DOI 10.2760/86427
Katalognummer KJ-NA-30930-EN-C
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ISSN 1831-9424 ISBN 978-92-76-45459-5 DOI 10.2760/258688 Katalognummer KJ-NA-30930-EN-N
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ISSN 1018-5593 ISBN 978-92-76-45461-8 DOI 10.2760/86427 Katalognummer KJ-NA-30930-EN-C
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