Simulationsbasierte Entwicklungsmethode für zukünftige Abgasemissionsgesetzgebung /Simulation-Based Development Methodology for Future Emission Legislation

Baumgarten, Henning; Scharf, Johannes; Thewes, Markus; Uhlmann, Tolga; Balazs, Andreas; Böhmer, Matthias

doi:10.51202/9783186799128-i-209

Cited by 5 publications

(3 citation statements)

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“…The empirical TWC and HEGO sensor models enable the simulation of the voltage of HEGO sensor downstream TWC. The TWC model is considering a map-based approach as already extensively discussed in several studies from Böhmer [54], Balasz et al [55][56][57] and Morcinkowski [58].The core of the TWC model, responsible for loading and unloading the oxygen storage, is based on a model presented by Brandt et al [59] with an adaption from Fiengo et al [60].…”

Section: Real-time Co-simulation Platformmentioning

confidence: 99%

Transferability Assessment of OBD-Related Calibration and Validation Activities from the Vehicle to HiL Applications

Dorscheidt,

Pischinger,

Bailly

et al. 2024

Applied Sciences

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With the Euro 7 pollutant emission legislation currently under discussion, advanced and more efficient exhaust aftertreatment systems are being developed. The technologies required for these are leading to an increase in the number of components and control systems requiring diagnoses strategies under the on-board diagnostics (OBD) legislation. With concurrent shorter development times and significant reductions in budgets allocated to conventional powertrain development, challenges in the field of OBD calibration and verification are already rising sharply. In response to these challenges, hardware-in-the-loop (HiL) approaches have been successfully introduced to support and replace conventional development methods. The use of complex simulation models significantly improves the quality of calibrations while minimizing the number of required prototype vehicles and test resources, thus reducing development costs. This paper presents a feasibility study for moving OBD-related calibration and validation tasks from the vehicle to a HiL platform. In this context, the calibration and verification process of an active diagnostic for monitoring the condition of the three-way catalyst (TWC) and the oxygen sensors in the exhaust aftertreatment system is presented. It is shown that all relevant signals are simulated with sufficient accuracy to ensure a robust transfer from the vehicle to a HiL test bench. Special attention is given to the simulation of aged components and their influence on the emission behavior of the system. Furthermore, it is discussed that transferring OBD tasks from the vehicle to the HiL test bench could result in significant savings in development time and a reduction in the number of physical prototype vehicles and test resources required.

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Section: Real-time Co-simulation Platformmentioning

confidence: 99%

Transferability Assessment of OBD-Related Calibration and Validation Activities from the Vehicle to HiL Applications

Dorscheidt,

Pischinger,

Bailly

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The holistic simulation methodology by the Chair of Thermodynamics of Mobile Energy Conversion Systems was presented for the first time in 2016 at the Vienna Engine Symposium [32]. Both the sub-models and their parameterization are continuously refined, while the real-time capability enables their use within the framework of virtual calibration by means of hardware-in-the-loop.…”

Section: Modeling a Gasoline Passenger Car 21 Simulation Approachmentioning

confidence: 99%

Achieving Zero-Impact Emissions with a Gasoline Passenger Car

et al. 2023

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The Euro 7 legislation and the Zero-Impact Emissions concept aim at significantly improving air quality. Technologies that reduce pollutant emissions beyond current gasoline passenger cars have already been intensively investigated, but a holistic system layout considering extended boundary conditions is missing so far. This paper therefore develops technical solutions to achieve a Euro 7 scenario and Zero-Impact Emissions for a 2030+ vehicle. First, challenging test scenarios are identified to develop compliant vehicles. The scenarios cover extreme conditions in real-world driving, such as hot and cold ambient conditions, stop-and-go in rural areas or high speed and steep gradients on highways. Different technology options are discussed and selected for the investigations. An empirical–physical simulation model for the exhaust gas aftertreatment system is extended with new technologies, such as an electrical heater disc in front of the catalyst or a burner in the exhaust system. In addition to stoichiometric engine operation and increased catalyst volume, the results show that the expected Euro 7 regulations can be achieved in all extreme scenarios by combining additional exhaust gas heating with engine power limitation or pre-heating. Moreover, even Zero-Impact Emissions are achieved in most cases with the same technology options.

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“…Worst-case cycles based on DoE and test bench investigation approaches [17,30,31,[88][89][90][91][92][93] offer a detailed tool for the evaluation of vehicle and pollutant specific characteristics. Especially in early stages of the vehicle development, these approaches provide a deep knowledge about potential future challenges during the further calibration and can support the selection of appropriate hardware.…”

Section: Worst-case Cyclesmentioning

confidence: 99%

Real Driving Emission Calibration—Review of Current Validation Methods against the Background of Future Emission Legislation

et al. 2021

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Reducing air pollution caused by emissions from road traffic, especially in urban areas, is an important goal of legislators and the automotive industry. The introduction of so-called “Real Driving Emission” (RDE) tests for the homologation of vehicles with internal combustion engines according to the EU6d legislation was a fundamental milestone for vehicle and powertrain development. Due to the introduction of non-reproducible on-road emission tests with “Portable Emission Measurement Systems” (PEMS) in addition to the standardized emission tests on chassis dynamometers, emission aftertreatment development and validation has become significantly more complex. For explicit proof of compliance with the emission and fuel consumption regulations, the legislators continue to require the “Worldwide Harmonized Light Duty Vehicle Test Cycle” (WLTC) on a chassis dynamometer. For calibration purposes, also various RDE profiles are conducted on the chassis dynamometer. However, the combination of precisely defined driving profiles on the chassis dynamometer and the dynamics-limiting boundary conditions in PEMS tests on the road still lead to discrepancies between the certified test results and the real vehicle behavior. The expected future emissions standards to replace EU6d will therefore force even more realistic RDE tests. This is to be achieved by significantly extending the permissible RDE test boundary conditions, such as giving more weight to the urban section of an RDE test. In addition, the introduction of limit values for previously unregulated pollutants such as nitrogen dioxide (NO2), nitrous oxide (N2O), ammonia (NH3) and formaldehyde (CH2O) is being considered. Furthermore, the particle number (for diameters of solid particles > 10 nm: PN10), the methane (CH4) emissions and emissions of non-methane organic gases (NMOG) shall be limited and must be tested. To simplify the test procedure in the long term, the abandonment of predefined chassis dyno emission tests to determine the pollutant emission behavior is under discussion. Against this background, current testing, validation, and development methods are reviewed in this paper. New challenges and necessary adaptations of current approaches are discussed and presented to illustrate the need to consider future regulatory requirements in today’s approaches. Conclusions are drawn and suggestions for a robust RDE validation procedure are formulated.

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Simulationsbasierte Entwicklungsmethode für zukünftige Abgasemissionsgesetzgebung /Simulation-Based Development Methodology for Future Emission Legislation

Cited by 5 publications

References 0 publications

Transferability Assessment of OBD-Related Calibration and Validation Activities from the Vehicle to HiL Applications

Transferability Assessment of OBD-Related Calibration and Validation Activities from the Vehicle to HiL Applications

Achieving Zero-Impact Emissions with a Gasoline Passenger Car

Real Driving Emission Calibration—Review of Current Validation Methods against the Background of Future Emission Legislation

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