Technical Paper
Hydrogen Injection Insights: A Comprehensive Experimental Examination of Port Fuel Injection and Direct Injection
2024-04-09
2024-01-2611
The decarbonisation trajectory and the potential of hydrogen as a zero-carbon substitute fuel have effectively tackled environmental and sustainable energy concerns. The potential of hydrogen as a substitute for fossil fuels in various internal combustion engines holds promise for enhancing efficiency and achieving zero carbon emissions. This study exhibits an experimental investigation of a highly boosted, downsized spark ignition (SI) engine modified to utilise hydrogen as fuel, replacing the conventional gasoline supply system. The modified engine incorporates both port fuel injection (PFI) and direct injection (DI) hydrogen supply lines, capable of injecting hydrogen at pressures of up to 40 bar in the DI system and 10 bar in the PFI system, to analyse the performance and the emissions. Altering the air-to-hydrogen ratio (lambda) at different speeds to reach the combustion and engine limits for classifying and optimising the operation regions.