Real Driving Emissions — A Paradigm Change for Development

Maschmeyer, Hauke; Kluin, Matthias; Beidl, Christian

doi:10.1007/s38313-014-1014-y

Cited by 3 publications

(1 citation statement)

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“…Nowadays the urgent environmental concern has led to the adoption of stringent policies to reduce the impact of human activity on the overall balance of CO 2 . In the automotive field the main consequence has been the introduction of the recent Euro6D emission regulation, and the upcoming Euro7, which now consider more realistic testing procedures, such as Real Driving Emission (RDE) cycles 1,2 along with a reduction of the emitted pollutants. From a technical point of view, the challenge will be to comply with the emission regulation during real world cycles, where the engine may be turned off most of the time in the case of Plug-in Hybrid Electric Vehicles (PHEV), emphasizing the need of reducing the impact of multiple cold starts.…”

Section: Introductionmentioning

confidence: 99%

RDE cycle simulation by 0D/1D models to investigate IC engine performance and cylinder-out emissions

Marinoni

Onorati

Montenegro

et al. 2022

International Journal of Engine Research

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In this work, the development and application of advanced predictive 0D/1D methodologies to simulate Real Driving Emission (RDE) cycles are described. Firstly, the 1D simulation model is validated on a map of steady state operating points, which allows to use successively the very same model, with its calibration, during an RDE cycle simulation, considering the sequence of varying loads, and rotational speeds. In particular, the validated 1D model is used to simulate a typical RDE transient cycle of approximately 1 h and 45 min. The test case investigated is a modern plug-in hybrid passenger car engine, in which the thermal power unit consists of a 1 L three-cylinder, turbocharged gasoline engine. The experimental and simulated RDE cycle is characterized by a sensibly varying Internal Combustion Engine (ICE) operation, allowing to evaluate engine performance and cylinder out emissions. To speed up the calculation and significantly lower the Central Processing Unit (CPU)/real time ratio a dedicated numerical solver for fast simulation has been implemented and tested, while keeping the fidelity of the results. A predictive 0D, multi-zone model for Spark Ignition (SI) combustion has been applied, together with emission sub-models for the calculation of the main pollutants. Both instantaneous and cumulative emissions have been evaluated. The results of the simulations have been compared to the experimental data of RDE cycles, showing a good predictiveness of the models and the high potential of 0D/1D simulation codes as design tools, in the new scenario of demanding testing procedures. This approach can be applied for any engine configuration operating under any transient condition.

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Section: Introductionmentioning

confidence: 99%