Vehicle test mass definition and inertia mass step-less approach

Published: 2011.10.19

Peter Mock


At the 7th DTP meeting (Sept 12-14, 2011) it was agreed in principle to accept the proposal from the Netherlands (NL), Transport and Environment (T&E) and the International Council on Clean Transportation (ICCT) on an improved definition of vehicle test mass as well as the proposal from ICCT to substitute the current step-based inertia class system by a step-less approach. During the DTP meeting a combined solution for both proposals was discussed and agreed upon. It will be evaluated in validation phase 2 and further discussed at the next GRPE meeting in January 2012.

This paper is ICCT’s 4th contribution to the UNECE GRPE informal subgroup on the development of a worldwide harmonized light vehicles test procedure (WLTP-DTP).