Abstract :

The Increasing Demand For Cleaner And More Efficient Compression Ignition (CI) Engines Has Driven Research Into Alternative Fuels And Advanced Simulation Techniques. This Paper Presents A Comprehensive Simulation-based Study On The Performance And Emission Characteristics Of A CI Engine Enriched With Hydrogen (HHO) Gas Using The Diesel-RK Simulation Software. A Detailed Engine Model Is Developed To Analyze The Effects Of Key Operating Parameters — Ignition Timing, Injection Duration, Compression Ratio, Exhaust Gas Recirculation (EGR) Ratio, And Swirl Ratio — On Engine Behavior. Hydrogen Is Introduced As A Supplementary Fuel To Enhance Combustion Efficiency Due To Its High Flame Speed, Wide Flammability Limits, And Carbon-free Nature. The Simulation Evaluates Critical Performance Indicators Such As Maximum Cylinder Pressure And Specific Fuel Consumption (SFC), Along With Emission Parameters Including Nitrogen Oxides (NOx), Particulate Matter (PM), And Bosch Smoke Number. Results Demonstrate That HHO Enrichment Significantly Improves Combustion Characteristics, Leading To Higher Peak Cylinder Pressure, Reduced SFC, And Substantial Reductions In PM And Smoke Emissions. However, NOx Emissions Show A Moderate Increase Due To Elevated Combustion Temperatures, Which Can Be Effectively Mitigated Through Optimized EGR Ratios. The Study Confirms That Diesel-RK Provides Accurate, Reliable Predictions And Serves As A Cost-effective Tool For Parametric Optimization Before Physical Prototyping.

Published:

09-4-2026

Issue:

Vol. 26 No. 4 (2026)

Page Nos:

2162-2166

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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