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  11. Operation Parameters Investigation On Combustion And Emission Of A Non-road Diesel Engine Based On Orthogonal Experiment Design At Different Altitudes

Operation parameters investigation on combustion and emission of a non-road diesel engine based on orthogonal experiment design at different altitudes

Zhaojun Song1, Lianjiang Xu1, Lan Zhang2

  • 1School of Mechanical and Electrical Engineering, Yunnan Open University, Kunming, 650000, China.

Heliyon
|November 25, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

This study optimized engine performance at high altitudes using a two-stage optimization method. Results show significant reductions in fuel consumption and CO emissions, alongside ultra-low carbon smoke, despite increased NOx.

Area of Science:

  • * Internal Combustion Engines
  • * High-Altitude Performance Optimization
  • * Emissions Control

Background:

  • * Engines operating at high altitudes face challenges with combustion and emission performance.
  • * Optimizing engine parameters is crucial for efficiency and environmental compliance in these conditions.

Purpose of the Study:

  • * To improve combustion and emission performance of engines in high-altitude regions.
  • * To investigate the impact of various factors on engine performance through optimization.

Main Methods:

  • * A two-stage Optimization of Experiment Design (OED) method was employed.
  • * A primary OED identified influential factors, followed by a secondary OED with reduced parameters.
  • * Analysis focused on intake pressure, ignition delay, and combustion completeness.
Keywords:
Combustion and emissionsHigh attitudeOperation parameters optimizationOrthogonal experiment design

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Main Results:

  • * Low intake pressure negatively impacts spray mixing, ignition delay, and combustion efficiency.
  • * Two OED optimizations significantly reduced Indicated Specific Fuel Consumption (ISFC) by up to 25.2% and CO emissions by up to 25.2%.
  • * Ultra-low carbon smoke emissions were achieved, though NOx emissions increased by up to 122.5%.

Conclusions:

  • * The proposed two-stage OED method effectively improves engine efficiency and reduces specific emissions at high altitudes.
  • * While NOx emissions increased, substantial gains in fuel economy and reductions in CO and smoke were realized.
  • * The methodology offers practical value for engineering applications in high-altitude engine operation.