Browse Publications Technical Papers 2019-01-0747
2019-04-02

RDE testing of passenger cars: the effect of the cold start on the emissions results 2019-01-0747

This paper presents the results of passenger car tests (RDE - real driving emsisions on-road tests conducted under real-world driving conditions as defined by EU legislation). The main focus was on the comparison of exhaust emission results for two test cases: excluding the cold start during the initial phase of the RDE test (the procedure was in force until 2018) and the inclusion of cold within the emission results (i.e the current procedure) and the contribution of the same to the final results. In addition tosome theoretical arguments, some results obtained using the aforementioned procedures are presented. The tests were carried out ona passenger car with a spark-ignition engine with direct fuel injection; the vehicle met the Euro 6c emission standard. Implications for the testing process, emissions control and the future emissions profile for vehicles with such engines are discussed.

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