1D Modeling of a High-Performance Engine Fueled with H2 And Equipped with A Low NOx Aftertreatment Device 2024-37-0009

Hydrogen engines are currently considered as a viable solution to preserve the internal combustion engine as a power unit for vehicle propulsion. In particular, lean-burn gasoline Spark-Ignition (SI) engines have been a major subject of investigations due to the reduced emission levels and high thermodynamic efficiency. This strategy is suitable for the purpose of passenger car applications and cannot be tailored in the field of high performance engine, where the air mass delivered would require oversized turbocharging systems or more complex charging solutions. For this reason, the range of stoichiometric feeding condition is explored in the high performance engine, leading to the consequent issue of abatement of pollutant emissions. In this work a 1D model will be applied to the modeling of a V8 engine fueled with DI of hydrogen. The engine has been derived by a gasoline configuration and adapted to hydrogen in such a way to keep the same performance. The lambda condition has been chosen as a best compromise between performance and emission level focusing onto a single cylinder configuration. Then, the V8 engine has been build based on the developed single cylinder and the air delivery system configured to satisfy the required air mass flow rate. The aftertreatment system has been consequently sized to guarantee the maximum abatement condition during a driving test cycle. Different solution will be explored, based on the lambda strategy adopted. This work will present the emitted pollutant level emitted by the vehicle during a test cycle showing the low level of pollutant emitted and the feasibility of such a solution in the field of high-performance engines.