Comparison of official and "real-world" fuel consumption and CO2 emission values for passenger cars in Europe and the United States, which shows that the average discrepancy between them rose from less than 10% in 2001 to 25% in 2011.
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.
Report on a study commissioned by the ICCT and the Verband der Automobilindustrie of fuel efficiency improvements in the heavy-duty vehicle sector from improved trailer and tire designs by application of a new test procedure developed for the European Commission Directorate-General for Climate Action.
Analyzes the causes of high off-cycle NOx emissions from Euro IV/V heavy vehicles that threaten efforts to improve urban ambient air quality in Europe and in other countries that use the Euro regulation as a pattern, and recommends various measures to address the problem.
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 working paper, available in English and Chinese, provides an overview of existing in-use testing for CO2 and fuel economy programs in the United States in order to inform the development of a Chinese program.
Summarizes and evaluates approaches to testing and certifying power-train systems and complete vehicles.
