Assessment of Charge Dilution Strategies to Reduce Fuel Consumption in Natural Gas-Fuelled Heavy-Duty Spark Ignition Engines

Energies, Journal Year: 2025, Volume and Issue: 18(8), P. 2072 - 2072

Published: April 17, 2025

The need to decarbonize the road transport sector is driving evaluation of alternative solutions. From a long-term perspective, biomethane and e-methane are particularly attractive as green energy carriers part solutions for sustainable freight on-road transport, they offer significant CO2-equivalent emissions savings in net Well-to-Wheel assessment. However, make methane-fuelled spark ignition (SI) heavy-duty (HD) engines competitive market, their efficiency must be comparable top-performing diesel applications that dominate sector. To this end, dilution techniques such exhaust gas recirculation (EGR) or lean air–fuel mixtures represent promising Within limits specific engine’s tolerance used strategy, charge can improve thermal impact on pumping wall heat loss, capacity ratio (γ). potential has never been explored case methane SI HD characterized by semi diesel-like combustion system architecture. This work presents an experimental study characterize pollutant emission performance state-of-the-art single-cylinder engine (SCE) operating with EGR conditions. type representative most powertrains long-haul purposes. designed test plan majority conditions providing overview two methods overall performance. results highlight both effective achieving fuel savings, being more tolerable yielding higher improvements (10% peak vs. 5% EGR).

Language: Английский

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Optimization of Hydrogen Internal Combustion Engines Equipped with Turbocompound Technology for Enhanced Performance and Efficiency

Energies, Journal Year: 2025, Volume and Issue: 18(9), P. 2166 - 2166

Published: April 23, 2025

Hydrogen Internal Combustion Engines (H2ICEs) offer significant potential in reducing the CO2 emissions of heavy-duty transport sector pursuit European Green Deal targets. However, challenges associated with hydrogen energy density require advanced technologies for fuel efficiency enhancement. Hybrid powertrains, equipped innovative recovery systems, allow optimizing engine working point while recovering otherwise wasted energy. In particular, Turbocompound (TCo) systems content exhaust gases, improving overall powertrain. Optimizing both operation and TCo presents a challenge, as it requires balancing dynamic interaction between engine’s combustion process (which increases backpressure). This paper novel approach aimed at performance hybrid hydrogen-fueled internal by integrating system. The allows extracting 9 kW extra power peak respect to baseline configuration. assessment optimized series powertrains underscores capability strategy reduce consumption up 6.8%.

Language: Английский

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The Application of Nanoparticle Catalysts to Enhance Ammonia Reactivity and Improve Ammonia/Diesel Dual-Fuel Engine Performance

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Language: Английский

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Study on the calculation combustion inefficiency as varying inlet oxygen concentrations in an ammonia-fueled spark ignition engine

Fuel, Journal Year: 2025, Volume and Issue: 398, P. 135545 - 135545

Published: May 1, 2025

Language: Английский

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