Abstract
The introduction of the Euro 6c emission norm in 2017 resulted in a change of the type approval procedures. The most important of these was the replacement of the NEDC test with WLTC test with different procedures. In addition, the research was extended to include emission tests in real operating conditions (RDE). Such tests are enforced for heavy vehicles since 2014. PEMS apparatus was used for the measurements, which has been used by many research and development centers to carry out exhaust emissions measurements long before the applicable procedures were introduced. The article presents the methodology of conducting RDE measurements in accordance with the requirements defined by the Euro 6c norm. The focus in this case was primarily on the selection of the test route in the Poznań agglomeration. After determining its course, RDE measurements were made for a vehicle with a hybrid drive. The test route parameters have complied with the applicable requirements. All requirements were met and it was possible to analyze the exhaust emissions. The main focus being the determination of exhaust emissions from the entire test and in accordance with the EMROAD method. The CF (Comformity Factor) coefficients were also determined for both methods and compared with the applicable legal values. An analysis of the hybrid drive system operation was carried out, defining the degree of hybridization, which is the portion of the vehicle travel using only the electric motor of the drive system throughout the whole test. All analyzes were carried out in individual sections of the test: urban, rural and motorway.
Highlights
Increasing the efficiency and reducing the fuel consumption of drive systems is a complex multifaceted process that every car vehicle manufacturer performs according to an independently developed and adopted strategy [1,2,3,4,5]
The measurements carried out in the article confirmed the correct selection of the research route in the Poznań agglomeration for performing RDE tests
It was assumed that the route will be referred to as the PoznańRDE test route and on it the authors will perform RDE tests in accordance with the applicable procedures for PC and LDV category vehicles
Summary
Increasing the efficiency and reducing the fuel consumption of drive systems is a complex multifaceted process that every car vehicle manufacturer performs according to an independently developed and adopted strategy [1,2,3,4,5] This often requires major structural changes to be made both to the engine itself and to its accessories. In the long-term, the constructors assume that it will be possible to replace the classic internal combustion engine with a fuel cell powered by hydrogen, which will become the main source of energy It is one of the main directions of drive systems development. The article presents the results of exhaust emission tests from a vehicle using hybrid drive performed in accordance with the RDE procedures, which are currently one of the main directions of development of emission testing procedures
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