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An example of adoption of the model-based design (MBD) methodology in the development process of an LPG fuelling system

Sidorowicz Maciej

Combustion Engines

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2023

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R. 62, nr 3

104--108

EN

The research aims to recognize the potential of adopting the model-based design methodology to the development process of an LPG (liquefied petroleum gas) fuelling system. Changing regulations often force the modern development of internal combustion engines (Euro 7, CO2 reduction measures, etc.). With the definitive ban on new registrations of vehicles powered by internal combustion engines in Europe (planned for 2035), there is still ongoing development of the adaptation of the fuelling system to LPG. There is still market potential in adapting new internal combustion engines, usually equipped with direct injection systems, to reduce customers’ cost of ownership of a vehicle. As the engineering process should be accelerated in the face of the variety of direct injection systems offered by OEMs (original equipment manufacturers), the model-based design methodology is proposed to make the development more effective. The article presents the SWOT analysis of this approach in the engineering process and the potential of the method in an LPG system development is concluded.

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Innowacyjne zasilanie autonomicznego robota mobilnego ogniwem paliwowym

Białoń Tadeusz, Niestrój Roman, Rogala Tomasz, Skarka Wojciech

Przegląd Elektrotechniczny

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2022

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R. 98, nr 11

209--214

PL

W artykule przedstawiono prototypowy, hybrydowy układ zasilania autonomicznego robota mobilnego (AGV). Układ zasilania, jako podstawowe źródło energii, wykorzystuje wodorowe ogniwo paliwowe, zasilane z niskociśnieniowej butli metalowodorkowej. Dodatkowo, układ zasilania jest wyposażony w dwa pomocnicze bufory energii, baterię akumulatorów litowo-jonowych i baterię superkondensatorów. W celu uzyskania największej sprawności, ogniwo paliwowe współpracuje z przetwornicą energoelektroniczną, śledzącą punkt pracy o maksymalnej mocy (MPPT). Prototypowy układ zasilana przebadano w symulowanych warunkach operacyjnych, bazując na profilu zapotrzebowania na moc wyznaczonym pomiarowo w badaniach rzeczywistego AGV.

EN

The paper presents a prototype, hybrid automated guided vehicle (AGV) power supply system. The power supply system applies a hydrogen fuel cell as the primary source of energy, fed from a low-pressure metal hydride cylinder. Additionally, the power supply is equipped with two auxiliary energy buffers, a lithium-ion battery and a supercapacitor bank. For best efficiency, the fuel cell works with a power electronic inverter that tracks the maximum power point (MPPT). The prototype power system was tested in simulated operating conditions, based on the power consumption profile determined by measurement in the tests of a real AGV vehicle.

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Model-based design approach to reducing mechanical vibrations

Czop P., Wszołek G.

Journal of Achievements in Materials and Manufacturing Engineering

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2013

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Vol. 60, nr 1

39--47

EN

Purpose: The paper presents a sensitivity analysis method based on a first-principle model in order to reduce mechanical vibrations of a hydraulic damper. Design/methodology/approach: The first-principle model is formulated using a system of continuous ordinary differential equations capturing usually nonlinear relations among variables of the hydraulic damper model. The model applies three categories of parameters: geometrical, physical and phenomenological. Geometrical and physical parameters are deduced from construction and operational documentation. The phenomenological parameters are the adjustable ones, which are estimated or adjusted based on their roughly known values, e.g. friction/damping coefficients. Findings: The sensitivity analysis method provides major contributors and their magnitude that cause vibrations Research limitations/implications: The method accuracy is limited by the model accuracy and inherited nonlinear effects. Practical implications: The proposed model-based sensitivity method can be used to optimize prototypes of hydraulic dampers. Originality/value: The proposed sensitivity-analysis method minimizes a risk that a hydraulic damper does not meet the customer specification.