Minimization of Torque Deviation of Cylinder Deactivation Engine through 48V Mild-Hybrid Starter-Generator Control
| Autor: | Han Dong Hee, Manbae Han, Hyunki Shin, Donghyuk Jung, Seungwoo Hong |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Volumetric efficiency
cylinder deactivation Engine configuration Computer science 020209 energy 48V mild-hybrid starter-generator Airflow engine modeling Noise vibration and harshness 02 engineering and technology lcsh:Chemical technology Combustion Biochemistry Automotive engineering Article Analytical Chemistry Cylinder (engine) law.invention 0203 mechanical engineering law 0202 electrical engineering electronic engineering information engineering Torque lcsh:TP1-1185 Electrical and Electronic Engineering combustion model Instrumentation Atomic and Molecular Physics and Optics in-cylinder pressure Vibration Ignition system 020303 mechanical engineering & transports SI turbulent flame model |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 21 Issue 4 Sensors, Vol 21, Iss 1432, p 1432 (2021) |
| ISSN: | 1424-8220 |
| Popis: | Cylinder deactivation (CDA) is an effective technique to improve fuel economy in spark ignition (SI) engines. This technique enhances volumetric efficiency and reduces throttling loss. However, practical implementation is restricted due to torque fluctuations between individual cylinders that cause noise, vibration, and harshness (NVH) issues. To ease torque deviation of the CDA, we propose an in-cylinder pressure based 48V mild-hybrid starter-generator (MHSG) control strategy. The target engine realizes CDA with a specialized engine configuration of separated intake manifolds to independently control the airflow into the cylinders. To handle the complexity of the combined CDA and mild-hybrid system, GT-POWER simulation environment was integrated with a SI turbulent combustion model and 48V MHSG model with actual part specifications. The combustion model is essential for in-cylinder pressure-based control thus, it is calibrated with actual engine experimental data. The modeling results demonstrate the precise accuracy of the engine cylinder pressures and of quantities such as MAF, MAP, BMEP, and IMEP. The proposed control algorithm also showed remarkable control performance, achieved by instantaneous torque calculation and dynamic compensation, with a 99% maximum reduction rate of engine torque deviation under target CDA operations. |
| Databáze: | OpenAIRE |
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