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Quantifies the expected effect of tire classification on CO2 as input for a discussion on tire selection in the informal subgroup on the development of the WLTP test procedure.
This paper compares fuel consumption / CO2 values of passenger cars from different sources and aims at quantifying the discrepancy between laboratory type-approval values and real-world values, including a retrospective analysis for the years 2001-2011 to determine if the gap between the two datasets has increased over time. Potential explanations for the discrepancies found are discussed and possible practical solutions for the future outlined.
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).
This paper presents new analysis on the implications of the current inertia class based system and outlines two alternative approaches for discussion within the WLTP-DTP working group.
Builds on more detailed explanations in past WLTP doucments and presents, for discussion, a proposal for defining inertia classes for the WLTP GTR.
This paper was submitted to the UNECE GRPE informal subgroup on the development of a worldwide harmonized light vehicles test procedure (WLTP-DTP) on the issue of inertia classes to be used in the development of the WLTP.