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Virtual Transmission Evaluation Using an Engine-in-the-Loop Test Facility
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
This paper describes an approach to reduce development costs and time by frontloading of engineering tasks and even starting calibration tasks already in the early component conception phases of a vehicle development program. To realize this, the application of a consistent and parallel virtual development and calibration methodology is required. The interaction between vehicle subcomponents physically available and those only virtually available at that time, is achieved with the introduction of highly accurate real-time models on closed-loop co-simulation platforms (HiL-simulators) which provide the appropriate response of the hardware components.
This paper presents results of a heterogeneous testing scenario containing a real internal combustion engine on a test facility and a purely virtual vehicle using two different automatic transmission calibration and hardware setups. The first constellation is based on an already validated vehicle model (A), including a physical dual-clutch transmission model (DCT), a semi-physical tire model and a vehicle dynamics model. With this standard configuration, the real-time model accuracy is initially illustrated by comparing the operating points distribution and the tailpipe emissions (diluted vs. undiluted) in “Worldwide harmonized Light vehicles Test Cycle” (WLTC) tests for the closed-loop setup at the engine test bench to the real vehicle on a chassis dynamometer. Furthermore, the achievable reproducibility with this in-the-loop approach regarding gaseous and particulate emissions is shown. Finally, the sensitivity and reproducibility of tailpipe emissions related to changes in the calibration set of the virtual “Transmission Control Unit” (TCU) are pointed out for this configuration in “Real Driving Emissions” (RDE) tests.
In a second step, another vehicle model (B) is set up and also validated using extensive vehicle measurements. In contrast to model A, model B is equipped with an eight speed automatic transmission model, based on physical relations and an all-wheel drive drivetrain model. During the validation process of model B, several drivability and emission tests have been performed in a Model-in-the-Loop simulation environment. Afterwards, the validated transmission and TCU models were virtually installed into the vehicle model A, resulting in vehicle variant C. This physically nonexistent, virtual vehicle was then tested at the Engine-in-the-Loop test facility. The conceptually different results at the test bench are compared and discussed regarding the vehicle A setup. The potential and reproducibility of the Engine-in-the-Loop approach are shown by a compilation of the results for the variants A and C.
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CitationGuse, D., Klein, S., Andert, J., Pischinger, S. et al., "Virtual Transmission Evaluation Using an Engine-in-the-Loop Test Facility," SAE Technical Paper 2018-01-1361, 2018, https://doi.org/10.4271/2018-01-1361.
Data Sets - Support Documents
|Unnamed Dataset 1|
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- Maschmeyer , H. , Kluin , M. , and Beidl , C. 2015
- Klein , S. , Xia , F. , Savelsberg , R. , Guse , D. et al. Engine-in-the-Loop: Closed Loop Test Bench Control with Real-Time Simulation SAE Int. J. Commer. Veh. 10 2 95 185 2017 10.4271/2017-01-0219
- Jiang , S. , Smith , M.H. , and Kitchen , J. Development of an Engine-in-the-Loop Vehicle Simulation System in Engine Dynamometer Test Cell SAE Technical Paper 2009-01-1039 2009 10.4271/2009-01-1039
- Del Mastro , A. , Chasse , A. , Pognant-Gros , P. , Corde , G. et al. Advanced Hybrid Vehicle Simulation: From “Virtual” to “HyHil” Test Bench SAE Technical Paper 2009-24-0068 2009 10.4271/2009-24-0068
- Teiner , S. and Schneeweiss , B. Evaluation of Nox and Fuel Consumption Reduction of Parallel Diesel-Hybrid Powertrains using Engine-in-the-Loop Simulation SAE Technical Paper 2010-32-0128 2010 10.4271/2010-32-0128
- Tavares , F. , Johri , R. , Salvi , A. , Baseley , S. et al. Hydraulic Hybrid Powertrain-In-the-Loop Integration for Analyzing Real-World Fuel Economy and Emissions Improvements SAE Technical Paper 2011-01-2275 2011 10.4271/2011-01-2275
- Shidore , N. , Ickes , A. , Wallner , T. , Rousseau , A. et al. Evaluation of Ethanol Blends for Plug-In Hybrid Vehicles Using Engine in the Loop SAE Technical Paper 2012-01-1280 2012 10.4271/2012-01-1280
- Xia , F. , Klein , S. , Savelsberg , R. , Guse , D. , et al. Road-to-Rig-to-Desktop-Virtual Development Using Real-Time Engine Modelling and Powertrain-Co-Simulation The Ninth International Conference on Modeling and Diagnostics for Advanced Engine Systems (COMODIA 2017