Standard Cycles Comparison (IEA) & Impacts on the Cost

Paper #:
  • 2018-01-0423

Published:
  • 2018-04-03
Abstract:
A new type of approval procedure for light duty vehicles, the Worldwide harmonized Light vehicles Test Procedure (WLTP), developed by an initiative of the United Nations Economic Commission for Europe, will come into force by the end of 2017. The current European type-approval procedure for energy consumption and CO2 emissions of cars, the New European Driving Cycle (NEDC), includes a number of tolerances and flexibilities that no longer accurately reflect state-of-the-art technologies. Indeed, based on an analysis of real-world driving data from the German website spritmonitor.de, the ICCT concluded that the differences between official laboratory and real-world fuel consumption and CO2 values were around 7% in 2001. This discrepancy has been increasing continuously since then to around 30% in 2013 with notable differences found between individual manufacturers and vehicle models. In sight of the transition from NEDC to WLTP, many research activities have been carried out to verify the capability of current and future engine/vehicle technologies to meet the new regulations on energy consumption and greenhouse gas emission. The new procedure will also have consequences on the NEDC-based CO2 passenger cars’ emission target for 2020-2021 (95 g CO2/km), which will need to be adapted to the new testing procedure. This study compares the energy consumption benefits of various technologies for multiple drive cycles including current and future regulatory tests in the US and EU. This paper identifies and quantifies the impacts of the main parameters influencing the energy consumption for different timeframes, vehicle classes, powertrains, and technologies. In addition, the paper estimates the cost benefit to the customer (levelized cost of driving, total present value, etc.) of each option in different areas of the world
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