Technical Paper
Effects of Fuel Injection Method on Energy Efficiency and Combustion Characteristics of SI Engine Fed with a Hydrogen-Rich Reformate
2020-09-15
2020-01-2082
Various potential alternative fuels for internal combustion engines are studied nowadays to reduce dependency on fossil fuel. Hydrogen-rich reformate produced onboard as a result of fuel reforming in an internal combustion engine with a high-pressure thermochemical recuperation is a promising alternative gaseous fuel. This paper reports on the effects of the reformate fuel injection method on energy efficiency and combustion characteristics of a single-cylinder spark ignition (SI) engine with a high compression ratio (16:1) at steady-state conditions. A comparison between port (PFI) and direct (DI) reformate injection is performed. Engine performance and combustion parameters are evaluated and analyzed. For both injection strategies, a similar relatively high indicated efficiency (50%) is observed. This is a joint result of waste heat recovery and hydrogen combustion benefits.