Work

Pilot injection timing impact on combustion characteristics for a dual-fuel HCCI engine: experimental analysis

Year: 2025

Type: article

Abstract: This paper presents an experimental investigation into the performance of a dual-fuel HCCI engine operating with syngas and diesel. The pilot diesel injection angle is identified as a critical parameter influencing combustion timing, torque output, and overall engine efficiency. Syngas, primarily composed of hydrogen (2) and carbon monoxide (CO), exhibits distinct combustion characteristics that significantly impact engine performance. The results reveal that average torque in dual-fuel operation follows a bell-shaped curve with respect to pilot injection timing, achieving peak torque within a specific range of injection angles. The study underscores the importance of optimizing the pilot injection angle based on the syngas flow rate to maximize engine performance. These findings demonstrate the potential of dual-fuel multi-cylinder HCCI engines to achieve enhanced efficiency while emphasizing the necessity for precise control of injection timing to optimize combustion processes and ensure stable operation.

Source: IFAC-PapersOnLine

DOI: 10.1016/j.ifacol.2025.07.076

Authors: L. El-Younsi, D. Nelson-Gruel, Y. Chamaillard

Institutions: Université d'Orléans, Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique

Language: English

Topic: Advanced Combustion Engine Technologies

Subfield: Fluid Flow and Transfer Processes

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

Funder: Isfahan University of Technology