Investigating the Correlation Equations and the Impact of Peak Pressure on the Performance and Emissions of an Ethanol Engine

Authors

  • Nguyen Xuan Khoa Hanoi University of Industry, Vietnam
  • Bui Thi Chi Hanoi University of Industry, Vietnam
  • Pham Tuan Anh Hanoi University of Industry, Vietnam
  • Nguyen Minh Quan Hanoi University of Industry, Vietnam
  • Le Dinh Manh Hanoi University of Industry, Vietnam
  • Duong Van Hung Hanoi University of Industry, Vietnam
Volume: 15 | Issue: 3 | Pages: 23393-23398 | June 2025 | https://doi.org/10.48084/etasr.10739

Received: 27 February 2025 | Revised: 6 April 2025 | Accepted: 19 April 2025 | Online: 4 June 2025


Corresponding author: Duong Van Hung

Abstract

The transition from fossil fuels to renewable energy sources is imperative for sustainable development, with ethanol emerging as a promising biofuel due to its potential to reduce harmful emissions. This study investigates the impact of peak pressure (Pmax) on the performance and emissions of ethanol-fueled internal combustion engines. Simulation results indicate that as Pmax increases from 24.45 bar to 87.66 bar, torque rises from 12.62 Nm to 24.86 Nm, representing a 97.0% improvement, while Brake-Specific Fuel Consumption (BSFC) drops by 64.78%. However, when Pmax exceeds 87.66 bar, performance gains become marginal, and fuel efficiency deteriorates. Notably, NOx emissions increase exponentially with higher Pmax, rising from 0.000987 g/kWh at 24.45 bar to 9.65 g/kWh at 99.22 bar, underscoring the trade-off between performance and environmental impact. Conversely, CO and HC emissions decrease significantly within the optimal pressure range (59.56–99.22 bar), reaching their lowest values at 87.66 bar before slightly rebounding due to incomplete combustion at extreme pressures. By establishing a quantitative correlation between Pmax, engine performance, and emissions, this study identifies 87.66 bar as the optimal peak pressure for balancing power output and emissions control in ethanol-fueled engines. These findings provide valuable insights for optimizing ethanol combustion strategies, contributing to the sustainable development of biofuels in the internal combustion engine industry.

Keywords:

ethanol fuel, peak pressure, engine performance, emissions

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References

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How to Cite

[1]
Khoa, N.X., Chi, B.T., Anh, P.T., Quan, N.M., Manh, L.D. and Hung, D.V. 2025. Investigating the Correlation Equations and the Impact of Peak Pressure on the Performance and Emissions of an Ethanol Engine. Engineering, Technology & Applied Science Research. 15, 3 (Jun. 2025), 23393–23398. DOI:https://doi.org/10.48084/etasr.10739.

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Copyright (c) 2025 Nguyen Xuan Khoa, Bui Thi Chi, Pham Tuan Anh, Nguyen Minh Quan, Le Dinh Manh, Duong Van Hung

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