Operating a Single-Cylinder Engine with a Multi-Cylinder Engine 1D-Model in the Loop with Real-Time Combustion Feedback
Ahlskog, André (2023)
2023
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2023061223511
https://urn.fi/URN:NBN:fi:amk-2023061223511
Tiivistelmä
With increasingly stringent emission regulations, greenhouse gas reduction targets and growing demand for more sustainable energy, the development of internal combustion engine (ICE) technology has become more critical than ever. Short development cycles and rapid introduction of carbon-free fuels such as hydrogen and ammonia, in combination with complex combustion systems, further increases the need to improve and accelerate the development of ICE. Single-cylinder engine (SCE) platforms and real-time modelling can be effective tools to meet this demand. This thesis has aimed to combine a real-time capable engine model with an SCE platform to enable the SCE to run more according to real multi-cylinder engine (MCE) conditions.
A literature review of real-time modelling within the ICE industry has been made to achieve the goals set up within this work. The main focus was on applications utilising Gamma technologies GT-SUITE simulation software, especially fast-running models (FRM) and GT-xRT. For the SCE and model coupling, an already fast-running MCE model built up in GT power was further modified and converted into an even faster xRT-model. The xRT-model has then been implemented into an already existing Simulink environment. To achieve real-time combustion feedback, a Speedgoat/Simulink Real-Time system was utilised, with measured cylinder pressure from the SCE sent from Speedgoat over User Datagram Protocol (UDP) to the Simulink environment.
The outcome of this thesis is a real-time capable MCE model with combustion feedback from the SCE, in a sense creating a model/hardware-in-the-loop (MiL/HiL) system. The simulated MCE can model real engine dynamics missing from an SCE research platform, such as turbocharger (TC) system and engine-driven auxiliaries. With combustion feedback to the model, it can also automatically simulate and calculate quantities that cannot be measured, e.g., in-cylinder conditions.
A literature review of real-time modelling within the ICE industry has been made to achieve the goals set up within this work. The main focus was on applications utilising Gamma technologies GT-SUITE simulation software, especially fast-running models (FRM) and GT-xRT. For the SCE and model coupling, an already fast-running MCE model built up in GT power was further modified and converted into an even faster xRT-model. The xRT-model has then been implemented into an already existing Simulink environment. To achieve real-time combustion feedback, a Speedgoat/Simulink Real-Time system was utilised, with measured cylinder pressure from the SCE sent from Speedgoat over User Datagram Protocol (UDP) to the Simulink environment.
The outcome of this thesis is a real-time capable MCE model with combustion feedback from the SCE, in a sense creating a model/hardware-in-the-loop (MiL/HiL) system. The simulated MCE can model real engine dynamics missing from an SCE research platform, such as turbocharger (TC) system and engine-driven auxiliaries. With combustion feedback to the model, it can also automatically simulate and calculate quantities that cannot be measured, e.g., in-cylinder conditions.