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Calibration of Torque Structure and Charge Control System for SI Engines Based on Physical Simulation Models
Technical Paper
2006-01-0854
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A physics-based simulation program developed by IAV is used to calibrate the torque structure and cylinder charge calculation in the electronic control unit of SI engines. The model calculates both the charge cycle and combustion phase based on flow mechanics and a fractal combustion model.
Once the air mass in the charge cycle has been computed, a fractal combustion model is used for the ongoing calculation of cylinder pressure and temperature. The progression of cylinder pressure over the high and low-pressure phases also provides information on engine torque.
Following the engine-specific calibration of the model using elemental geometric information and reduced test bench measurements, the physical engine properties can be simulated over the operating cycle. The calibrated model allows simulations to be carried out at all operating points and the results to be treated as virtual test bench measurements. The main value for the subsequent calibration of ECU functions is engine torque, which in turn depends on angular timing of spark ignition.
Besides the calibration of the ECU torque structure, the simulation model once calibrated can be used to obtain more engine-specific information such as maximum pressure and pressure increase in relation to the operating point.
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Authors
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Citation
Millich, E., Gottschalk, W., Köller, M., Braun, H. et al., "Calibration of Torque Structure and Charge Control System for SI Engines Based on Physical Simulation Models," SAE Technical Paper 2006-01-0854, 2006, https://doi.org/10.4271/2006-01-0854.Also In
References
- Gray C. “A Review of Variable Engine Valve Timing” SAE paper 880386 1988
- Kreuter P. Heuser P. Wensing M. Peter U. Böcker O. Erz R. “Potentials of Variable Engine Timing on Supercharged Engines” “Engine Combustion Process (VII Congress)” ESYTEC Energie- und Systemtechnik GmbH Erlangen 399 410 2005
- Kleppmann, W. 2001
- IAV „DoE - Design of Experiments” München 2005
- Millich E. Bohn C. Braun H. Schultalbers M. “A Highly Efficient Simulation-Based Calibration Method Exemplified by the Charge Control” SAE paper 2005-01-0052 2005
- Krug K. Liebl J. Munk F. Kämmer A. Reuss H.C. “Physical Modelling and Use of Modern System Identification for Real-Time Simulation of Spark Ignition Engines in all Phase of Engine Development” SAE paper 2004-01-0421 2004
- Grondin O. Stobart R. Chafouk H. Maquet J. “Modelling the Compression Ignition Engine for Control: Review and Future Trends” SAE paper 2004-01-0423 2004
- Ioannou M. Gurney D. Downing J. “The Application of Design of Experience and 1-D Simulation to Create a Rapid Concept Optimisation Tool for I4 Engines SAE paper 2005-01-0226 2005
- Vibe, I.I. 1970
- Heinrich C. Scharrer O. Gebhard P. Pucher H. “Investigation of a 2-step Valve Train and its Influence on Combustion by Means of Coupled CFD Simulation” SAE paper 2005-01-0690 2005
- Maas U. “Potentials and Problems of the Simulation of Engine Combustion processes” “Engine Combustion Process (VII Congress)” ESYTEC Energie- und Systemtechnik GmbH Erlangen 257 273 2005
- Bozza F. Gimelli A. Merola S.S. Vaglieco B.M. “Validation of a Fractal Combustion Model through Flame Imaging” SAE paper 2005-01-1120 2005
- Metgalchi M. Keck J. “Burning Velocities of Air with Methanol, Isooctane and Indolene at High Pressure and Temperature” Combustion and Flame 48 191 210 1982
- Woschni G. “Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine” SAE 670931 1967