The New European Driving Cycle (NEDC) is a standardized test procedure designed to evaluate and compare the fuel efficiency and CO2 emissions of vehicles. Developed by the European Union, it is primarily used to determine the performance of cars and light commercial vehicles in terms of fuel consumption and emissions.
The NEDC consists of two driving cycles: a urban cycle and an extra-urban cycle. The urban cycle simulates city driving conditions, while the extra-urban cycle represents driving on open roads. Each of these cycles has specific criteria regarding distance, duration, and speed range. The entire test takes approximately 20 minutes to complete and is conducted in a controlled laboratory environment.
During the NEDC test, the vehicle is driven under specific conditions, such as controlled acceleration and deceleration rates. The test measures various parameters including speed, fuel consumption, and CO2 emissions. The results obtained from the NEDC are used by regulators, manufacturers, and consumers to assess the environmental impact and fuel efficiency of vehicles.
However, it is important to note that the NEDC has faced criticism for not accurately representing real-world driving conditions. Due to its controlled nature, the test fails to reflect factors such as varying traffic conditions, terrain, and consecutive accelerations, which can significantly affect a vehicle's actual fuel consumption and emissions. As a result, the NEDC has been replaced by the Worldwide Harmonized Light Vehicles Test Procedure (WLTP) in many jurisdictions, a more accurate testing protocol that better represents real-world driving conditions.
