Mr Park reminded the group that Korea is actively participating in the MAC TP activities and presented the status and early findings of the study.

Korea follows UN-ECE regulations for diesels and is interested in establishing incentives for eco-innovations, including high efficiency MAC therefore the WP.29 procedures are an important aspect.

NIER has already made some testing on 5 vehicles to contribute to the pilot study on determining additional CO2 from MAC operation. The vehicles (gasoline ULEV / diesel EU4 / 5) covered the a range of MAC equipment from basic to advanced (classification as in the TNO report).
NIER followed the draft procedure contained in GRPE-61-21 with some exception

• ► Cell temp / humidity control not perfect
• ► Issues with setting max cabin air flow
• ► No glazing corrections

As a result of the testing, the following conclusions and recommendations were given:

• ► Recommend 30 minutes preconditioning at 90 kmh-1 to give sufficiently stable test conditions.
• ► CO2 tolerance of 5% is very severe, recommend is 10%

Questions:

Mr Steininger (EC) asked whether the results for the individual phases are available. Mr Park confirmed that they have them but these are not included in this summary presentation.
There was further discussion on the most representative metric for consumer information kg/hr or l/100km. Mr Park said that Korea currently believes kg/hr is the better metric.

Further discussions followed on the difficulty of obtaining accurate data on the influence of glazing on the various parameter curves. Korea is still hopeful that manufacturers will be able to provide this data.