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May 24, 2026FME TransactionOpen Access

Effects of high-ethanol blends on performance and emissions of a spark-ignition engine with single and dual injector configurations

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Authors

VCVo ChauVDVo Duy

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Overview

Randomized trial investigates fuel performance and emissions in spark-ignition engines, suggesting dual injection enhances efficiency with ethanol blends.

Key Points

  • This study aims to evaluate how different high-ethanol blends influence the performance and emissions of spark-ignition engines using varied injector configurations.
  • Conducted experiments at a fixed engine speed of 6500 rpm across varying load conditions.
  • Used gasoline-ethanol blends (E25, E50, E85, E100) with single and dual-port fuel injection configurations.
  • Calibrated injector mass-flow characteristics for accurate fuel delivery.
  • Ethanol blends generally increased engine output but raised brake specific fuel consumption (BSFC) due to lower heating values.
  • Under part-load conditions, dual injection of E25 achieved brake power comparable to gasoline, improving brake thermal efficiency.
  • Increased ethanol content led to significantly lower CO, HC, NOx, and CO2 emissions, with dual injection enhancing emission control.

Cite This Study

Chau et al. (2026) studied this question.

synapsesocial.com/papers/6a12966a48a0ea166567337bhttps://doi.org/10.5937/fme2602307t
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