The US Environmental Protection Agency will introduce real-world testing procedures for new cars in order to evaluate the real figures of nitrogen oxide emissions.
The diesel-emission scandal triggered by Volkswagen’s cheating software has made the US Environmental Protection Agency to reconsider it testing procedures. Therefore, in order to prevent such “inconsistencies”, as there are called by VW, EPA will improve its testing procedures of new cars by evaluating them under real-world driving environment, The New York Times reports. At present, such tests are being performed by regulators under laboratory conditions, and the nitrogen oxide emissions figures from tests are lower than the real-world ones. The Environmental Agency intends to perform real-word scenarios test on 2015 and 2016 model-year cars, and also wants to test some older vehicles too. This real-test results will be evaluated by connecting some special monitoring systems to cars for revealing their true NOx emissions figures. The EPA said earlier this month that another 10,000 cars made by Volkswagen and its Audi and Porsche brands may also have bypassed the tests, though Volkswagen did not admit at that moment.
The European Commission also wants real-world testing to become available from 2016 and only become mandatory following a two-year phase-in for new vehicles from 2017. In these real-world tests, the 80 milligram/kilometre limit could only be exceeded by 60 percent and then fall to 20 percent. Meanwhile, the compromise agreed upon will introduce a conformity factor of 2.1 from late 2017, while another two years later it would be reduced to 1.5 – which is still up 50 percent from the agreed limit.