Performance and Emissions Assessment of High Speed PFI Engine Fueled with Hydrogen and Gasoline as a Different Fuels

This experimental research test was conducted on DTSI (Digital Three Spark Ignition) fueled with an EFI (Electronic Fuel Injection) system. This engine is high speed. single-cylinder, high-compression-ratio, and multi-valve (4 valves per cylinder). The engine was modified for testing on hydrogen gaseous fuel. Two different injectors for gasoline and hydrogen fuel were used. All tests are conducted from 3000 rpm to 6000 rpm with intervals of 1000 rpm at Wide Open Throttle (WOT) conditions. Initially the engine was tested with gasoline fuel and on hydrogen with λ status of 1.6,2.0 and 3.0. From the results, the maximum brake thermal efficiency achieved is 39.5% with hydrogen fuel; this is an 8.5 % improvement over gasoline. From this experiment, it can be concluded that the existing spark ignition engine can be easily converted to a hydrogen port fuel injection system with few modifications to meet the future stringent emission norms.