NEDCsüsteemi

NEDCsüsteemi refers to the New European Driving Cycle, a standardized laboratory test procedure used to measure fuel consumption and CO2 emissions for passenger cars. It was established in 1997 and replaced the previous European test cycle. The NEDC consisted of four urban driving cycles and one extra-urban driving cycle. Each cycle simulated a specific driving scenario, including acceleration, deceleration, and stationary periods, under controlled laboratory conditions. The aim was to provide a consistent and comparable basis for evaluating the environmental performance of different vehicles.

The NEDC has been criticized for not accurately reflecting real-world driving conditions, often resulting in significantly lower measured values than those achieved in actual use. Factors such as driving style, traffic conditions, and the use of auxiliary equipment like air conditioning were not fully accounted for. Consequently, vehicle manufacturers could optimize their vehicles for the NEDC test, leading to a discrepancy between advertised and actual fuel economy.

In response to these limitations, the NEDC was officially replaced by the Worldwide Harmonized Light Vehicles Test Procedure (WLTP) in September 2017. The WLTP is designed to be more representative of real-world driving and includes a wider range of driving speeds, accelerations, and more realistic temperature conditions. While the NEDC is no longer the primary official test, its legacy continues as a reference point in discussions about vehicle efficiency evolution.