Abstract
The article compares driving test data using the latest legislative proposals applicable to passenger cars with different drives. For this purpose, cars of one type were selected, meeting the same exhaust toxicity standard (Euro 6c) and differing in used internal combustion engines (with spark-ignition, compression-ignition and hybrid drive). Several measurements were performed on the same test route in accordance with the RDE test guidelines, which requires a several of criteria to be met. These criteria include the length of the measuring sections, their overall timeshare and the dynamic characteristics of the drive. A portable emissions measurement system (PEMS) was used to record the engine and vehicle operating parameters and to measure the exhaust emissions during tests. This allowed for the monitoring of parameters such as: load value, engine speed and vehicle velocity. Then the obtained results were analyzed for their compatibility with the RDE procedure requirements. By determining the road emission of individual harmful compounds for all vehicles and the dynamic parameters of drive (relative positive acceleration and product of speed and positive acceleration) in various phases of the road test it was possible to compare them. On this basis, the impact of dynamic conditions of road tests on the obtained results of the road exhaust emission of harmful compounds for passenger cars with various drives was defined.
Highlights
Emission standards are established for the control of pollutants emitted from motor vehicles worldwide
Nowadays, more and more attention is given to road tests, known as research procedure (RDE) tests, using mobile research equipment type portable emissions measurement system (PEMS) (Portable Emission Measurement System) [23, 28, 29]
Research aim The aim of the research was to compare the exhaust emissions in relation to the dynamic parameters of RDE tests for vehicles with different drives
Summary
Emission standards are established for the control of pollutants emitted from motor vehicles worldwide. The authors of papers [12] pointed out that new research in real traffic conditions, currently simulated in various research tests (NEDC – New European Driving Cycle [26], CADC – Common Artemis Driving Cycles, WLTP – Worldwide Harmonized Light Vehicles Test Procedure [25]), may increase the emission of nitrogen oxides from vehicles. They postulated that it is necessary to make changes in the vehicles software, stating that these changes will be successful only for vehicles fitted with spark-ignition engines. Vehicles equipped with compression-ignition engines will require further investments to increase the effectiveness of the exhaust gas aftertreatment through the use of new methods of reducing the concentration of nitrogen oxides (e.g. SCR – Selective Catalyst Reduction system) [24]
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