A Systematic Review of Diesel Engine Parameter Selection for Taguchi-Based Optimization: Injection Timing, Pressure, Fuel Temperature and Cooling Flow Rate

Abstract

Diesel engines continue to play an important role in transportation and power generation, yet they are under growing scrutiny to comply with stricter emission regulations. Optimizing their performance requires precise control over key parameters influencing combustion, fuel utilization, and exhaust emissions. This study focuses on four critical factors—injection timing, injection pressure, fuel temperature, and cooling flow rate, which directly govern with BTE and emissions. The Taguchi Design of Experiments (DoE) approach is employed for its efficiency in analyzing multi-factor interactions using minimal experimental runs. Based on an extensive literature review and physical feasibility analysis, each parameter is studied at three levels within practical operating ranges: 19°–27° CA bTDC for injection timing, 400–600 bar for injection pressure, 25–35°C for fuel temperature, and 120–160 ml/min for cooling flow rate. These ranges ensure measurable variations without compromising engine safety or stability. The Taguchi L27 orthogonal array is selected to capture both main and interaction effects among the variables. This study provides a statistically sound and experimentally practical framework for optimizing diesel engine performance, facilitating enhanced brake thermal efficiency and reduced emissions through a systematic, data-informed approach

Cite as:

Vasim Bashir Maner, & Dr. Sanjay Dnyanu Yadav. (2025). A Systematic Review of Diesel Engine Parameter Selection for Taguchi-Based Optimization: Injection Timing, Pressure, Fuel Temperature and Cooling Flow Rate. Recent Trends in Thermodynamics and Thermal Energy System, 1(3), 10–24. 

https://doi.org/10.5281/zenodo.17484366