RDE-Homologation – Herausforderungen, Lösungen und Chancen

Maschmeyer, Hauke; Beidl, Christian; Düser, Tobias; Schick, Bernhard

doi:10.1007/s35146-016-0110-8

Cited by 15 publications

(10 citation statements)

References 2 publications

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“…Manche dieser Ansätze sind speziell auf die jeweilige Problemstellung zugeschnitten, andere hingegen lassen sich in Teilen oder in Gänze übergreifend nutzen. Die Entwicklungsschwerpunkte lassen sich auf folgende drei Use Cases nach [4] zurückführen:…”

Section: Vkm Use-cases Und Methodikbaukastenunclassified

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Methodikbaukasten zur effizienten, zielgerichteten RDE-Entwicklung – Potenziale und Perspektiven

et al. 2019

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Section: Vkm Use-cases Und Methodikbaukastenunclassified

“…Hierbei bedarf es insbesondere der Identifikation relevanter Testszenarien für den betrachteten Antriebstyp (sog. Most-Relevant-Test), da sich RDE-kritische Events in Abhängigkeit der gewählten Antriebstrangkonfiguration grundlegend unterscheiden [4].…”

Section: Virtuelle Integrationunclassified

Methodikbaukasten zur effizienten, zielgerichteten RDE-Entwicklung – Potenziale und Perspektiven

et al. 2019

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“…Besides requirements with regard to measurement equipment, the RDE legislation has put major challenges onto the calibration and validation process itself [26]. With a highly dynamic range of operating points, the potential area in the engine map experienced in a legislative RDE test is practically unlimited [27,28].…”

Section: Challenges Posed By Rdementioning

confidence: 99%

Real Driving Emissions—Conception of a Data-Driven Calibration Methodology for Hybrid Powertrains Combining Statistical Analysis and Virtual Calibration Platforms

et al. 2021

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The combination of different propulsion and energy storage systems for hybrid vehicles is changing the focus in the field of powertrain calibration. Shorter time-to-market as well as stricter legal requirements regarding the validation of Real Driving Emissions (RDE) require the adaptation of current procedures and the implementation of new technologies in the powertrain development process. In order to achieve highest efficiencies and lowest pollutant emissions at the same time, the layout and calibration of the control strategies for the powertrain and the exhaust gas aftertreatment system must be precisely matched. An optimal operating strategy must take into account possible trade-offs in fuel consumption and emission levels, both under highly dynamic engine operation and under extended environmental operating conditions. To achieve this with a high degree of statistical certainty, the combination of advanced methods and the use of virtual test benches offers significant potential. An approach for such a combination is presented in this paper. Together with a Hardware-in-the-Loop (HiL) test bench, the novel methodology enables a targeted calibration process, specifically designed to address calibration challenges of hybridized powertrains. Virtual tests executed on a HiL test bench are used to efficiently generate data characterizing the behavior of the system under various conditions with a statistically based evaluation identifying white spots in measurement data, used for calibration and emission validation. In addition, critical sequences are identified in terms of emission intensity, fuel consumption or component conditions. Dedicated test scenarios are generated and applied on the HiL test bench, which take into account the state of the system and are adjusted depending on it. The example of one emission calibration use case is used to illustrate the benefits of using a HiL platform, which achieves approximately 20% reduction in calibration time by only showing differences of less than 2% for fuel consumption and emission levels compared to real vehicle tests.

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“…Furthermore, cyber-physical hardware-in-the-loop (HiL) test setups—especially engine-in-the-loop (EiL) test benches—can be used, to simulate the vehicle behavior in a real-world environment on real routes. 23,43–45 Performing these tests on the engine test bench or emission chassis dynamometer can lead to an estimation of what to expect in a RDE test setup, while being able to obtain reproducible data. In particular, EiL setups allow to increase the amount of achievable tests, as the duration to soak and condition the test vehicle can be reduced and components can be exchanged quicker than in a real vehicle configuration.…”

Section: Current and Future Challenges To Comply With The Rde Requirementioning

confidence: 99%

Statistically supported real driving emission calibration: Using cycle generation to provide vehicle-specific and statistically representative test scenarios for Euro 7

Claßen

Pischinger

Krysmon

et al. 2020

International Journal of Engine Research

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The progression of emission legislation has intensified the efforts of the automotive industry to develop improved exhaust gas after-treatment systems. The requirement to fulfill Euro 6d-TEMP in real-world driving scenarios, the already significant calibration effort for Euro 6d and the Euro 7 emission standards in discussion have significantly increased the work load for calibration engineers and the requirements for testing resources. Many original equipment manufacturers are implementing taskforces in order not to have to discard the planned start of production for their products, and some are even already forced to reduce their product portfolio. This is due to the diverse testing matrix required to cover all possible real driving emissions test scenarios. One big challenge is the extension and possible variation of boundary conditions regarding ambient temperatures, traffic conditions, road gradients and other varying driving resistances. Moreover, the test duration can cause considerable differences in the measured emissions, even if the same route is driven repeatedly. Addressing these challenges makes the application of a dedicated, event-targeted emission calibration mandatory. Since only a few sequences of the time-consuming road tests are relevant for improving the emission calibration, the methodology presented in this article focuses on the exact reproduction of these emission events on an emission chassis dynamometer with the aim of implementing calibratable solutions for these events. This is done using a real driving emission-cycle-generator which creates real driving emission compliant severe test scenarios and which focuses on the statistical relevance related to the typical product specific operation. The underlying generation process accesses a large database with real driving emission measurement results focusing on vehicle- or vehicle-group-specific challenges, using statistical approaches. It will be demonstrated how this procedure reduces test time and how it helps to tackle the substantial real driving emission work-load, while providing a dependable base to achieve real driving emission legislation compliance.

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RDE-Homologation – Herausforderungen, Lösungen und Chancen

Cited by 15 publications

References 2 publications

Methodikbaukasten zur effizienten, zielgerichteten RDE-Entwicklung – Potenziale und Perspektiven

Methodikbaukasten zur effizienten, zielgerichteten RDE-Entwicklung – Potenziale und Perspektiven

Real Driving Emissions—Conception of a Data-Driven Calibration Methodology for Hybrid Powertrains Combining Statistical Analysis and Virtual Calibration Platforms

Statistically supported real driving emission calibration: Using cycle generation to provide vehicle-specific and statistically representative test scenarios for Euro 7

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