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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.
Based on an assessment of production costs for two GPF designs, we estimate for a 2.0L gasoline engine a cost of $106 for a stand-alone GPF and between $114 and $154 for a four-way catalyst, presented here as a three-way catalyst (TWC) with PM trapping capabilities.
Technical note on crop yield-price and land-price elasticities, key determinants of indirect land use change.
Calculates the fraction of biomass carbon removed from disturbed or cleared forests that is retained in wood products (not emitted to the atmosphere).
Actions that reduce or eliminate HFC-134a emissions can make an important contribution toward lowering the overall climate impact of the global auto fleet. This paper assesses alternate refrigerant emissions and their climate impacts.
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.
Summarizes key steps in fuel economy data collection and verification under the U.S. corporate average fuel economy system.
Case study demonstrates how metrics that include vehicle and/or fuel weight could relax incentives for manufacturers to devote technological improvements to reducing fuel consumption rather than boosting performance.