Objectified Evaluation and Classification of Passenger Vehicles Longitudinal Drivability Capabilities in Automated Load Change Drive Maneuvers at Engine-in-the-Loop Test Benches

Guse, Daniel; Heusch, Christian; Klein, Serge; Fahrbach, Timm; Andert, Jakob; Pischinger, Stefan; Tegelkamp, Stefan; Nijs, Martin; Scharf, Johannes

doi:10.4271/2020-01-0245

Cited by 8 publications

(14 citation statements)

References 72 publications

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“…The effort required to perform validations is continuously increasing due to ever-more complex powertrains and a rising number of vehicle variants in combination with a nonreproducible RDE test procedure. To deal with this effort effectively, it is essential to frontload the scope of development and testing [1][2][3][4][5]. Early feedback on the im pact of component development on the overall vehicle level thus leads to a sustainable reduction in costs [3][4][5].…”

Section: The Rde Challengementioning

confidence: 99%

“…To deal with this effort effectively, it is essential to frontload the scope of development and testing [1][2][3][4][5]. Early feedback on the im pact of component development on the overall vehicle level thus leads to a sustainable reduction in costs [3][4][5].…”

Section: The Rde Challengementioning

confidence: 99%

“…This makes it possible to separately evaluate and optimize the effects of individual hardware and/or software modifications on individual operating states and emission events of the combustion engine in interaction with the virtual vehicle concept and operating scenario. To implement an EiL test scenario, an internal combustion engine with the appropriate engine ECU and the complete exhaust aftertreatment system that is comparable to the one of the real vehicle is installed on a highly dynamic engine test bench [2][3][4][5][6][7][8][9][10].…”

Section: The Rde Challengementioning

confidence: 99%

Section: The Rde Challengementioning

confidence: 99%

“…Operating real-time simulation systems and real component test benches in the EiL context of a dynamic engine test bench essentially requires a discretely controlled exchange of speed and torque information [2][3][4][5][6][7]. The quality of the information exchange, taking into account the existing control architecture, significantly influences the quality and validity of the test results [5,11]. A special focus is placed on the exact implementation of transient application scenarios (start, start-stop, gear change, load changes, and so on), because these in turn have a significant influence on the emission formation [3][4][5]11].…”

Section: The Rde Challengementioning

confidence: 99%

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Next Level of Testing - Extended Frontloading through Latency-optimized EiL Test Benches

Guse

Andert

Walter³

et al. 2020

MTZ Worldw

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Optimized EiL test benches for the precise simulation and differentiated reproduction of real drives make it possible to counteract the significantly increased test effort caused by RDE test drives on the road. In particular, process times and latencies in the exchange of information have a negative influence on the quality and significance of the measurement results. The focus of current work is therefore on minimizing precisely those influencing parameters in order to be able to map real drives as accurately as possible, as shown in this article by RWTH Aachen and dSpace.

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Section: The Rde Challengementioning

confidence: 99%

Section: The Rde Challengementioning

confidence: 99%

Section: The Rde Challengementioning

confidence: 99%

Section: The Rde Challengementioning

confidence: 99%

Section: The Rde Challengementioning

confidence: 99%

See 3 more Smart Citations

Next Level of Testing - Extended Frontloading through Latency-optimized EiL Test Benches

Guse

Andert

Walter³

et al. 2020

MTZ Worldw

Self Cite

View full text Add to dashboard Cite

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NOx Emission Removal from a Parallel Diesel Engine Group by SCR System Based on Distributed Control Technology

Lei

Qin

Qiu

et al. 2021

Environ. Sci. Technol.

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In industrial application, an engine group with several engines running in parallel produces emissions, and because of its variable operation conditions and the number of engines being run, it produces great pollution. This study proposes a distributed control system (DCS) method to deal with NOx emissions from a diesel engine group. This DCS method contains several diesel engine test benches in parallel, and each engine is connected to an independent DCS unit with a selective catalytic reduction (SCR) device, and the central processing unit (CPU) distributes controlling quantities to each DCS unit. A dimensionless parameter, coefficient of difficulty K, is introduced to evaluate the NOx conversion efficiency of each unit. A control algorithm adopting the minimum K as the optimization control object to distribute the real-time NOx conversion efficiency for each unit is presented. This DCS deNOx technology has been applied in 10-engine test benches in parallel, and the results show that the DCS method not only controls NOx emissions of the engine group within the emission standard limit but also exhibits a good economic performance for suitable NOx conversion efficiency distribution and economical urea injection dose. This DCS emission control method is suitable for multiple diesel engines running in parallel under conditions of varied speeds and loads.

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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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Objectified Evaluation and Classification of Passenger Vehicles Longitudinal Drivability Capabilities in Automated Load Change Drive Maneuvers at Engine-in-the-Loop Test Benches

Cited by 8 publications

References 72 publications

Next Level of Testing - Extended Frontloading through Latency-optimized EiL Test Benches

Next Level of Testing - Extended Frontloading through Latency-optimized EiL Test Benches

NOx Emission Removal from a Parallel Diesel Engine Group by SCR System Based on Distributed Control Technology

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

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