In the absence of a representative from India, the secretary presented working paper HDH-07-07 by India. India proposes that the chassis dyno method can be used by Contracting Parties who have chassis dyno capabilities as an option to the HILS method.

The US GHG rule also includes complete hybrid vehicle certification on the chassis dyno. Coastdown testing to develop road load coefficients is performed consistent with the provisions of 40 CFR 1066. Coastdown requirements are largely based on SAE J1263 with some modifications. To correct fuel economy or emission results for net energy change of the RESS, the procedures specified for charge-sustaining operation in SAE J2711 are used.

Mr. Schulte indicated that chassis dyno testing of hybrid vehicles needed additional input compared to conventional vehicles, which is not a simple approach. Mr. Dekker confirmed that chassis dyno testing of hybrid vehicles is more complicated than for conventional vehicles. Mr. Jackson informed that SAE is updating the standard 2711. It was agreed to rely the assessment of chassis dyno testing on inputs from ongoing hybrid testing programs at different Contracting Parties.