Single cylinder activities on H2 combustion

LONGRUN is focussing on both future alternative liquid fuels auch as HVO for an optimised Compression Ignition (CI) combustion, as well as on Direct Injection (DI) Hydrogen spark ignited combustion.

LONGRUN has therefore published a scientific article called “Experimental and Numerical Investigation of a Direct Injection Spark Ignition Hydrogen Engine for Heavy-Duty Applications”.


G. Maio, A. Boberic, L. Giarracca, D. Aubagnac-Karkar, O. Colin, F. Duffour, K. Deppenkemper, L. Virnich, S. Pischinger
IFP Energies nouvelles, 1 et 4 avenue de Bois-PrĀ“eau, 92852 Rueil-Malmaison, France;
Institut Carnot IFPEN Transports
Chair of Thermodynamics of Mobile Energy Conversion Systems – RWTH Aachen,
Forckenbeckstr. 4, 52074 Aachen, Germany
FEV Europe GmbH, Neuenhofstr. 181, 52078 Aachen. Germany

Abstract (Preprint submitted to International Journal of Hydrogen Energy; May 31, 2022):

The H2 internal combustion engine is gaining increasing interest especially for commercial vehicles. Regarding the optimization of the combustion process, results of experimental investigations on a H2 heavy-duty single-cylinder engine in combination with numerical 3D-CFD investigations are presented. In addition to a Direct Injection (DI) Spark Ignited (SI) configuration, Port Fuel Injection (PFI) is explored to provide a reference with near homogeneous cylinder charge. The main objective is to assess a 3D-CFD-RANS framework based on ECFM and state-of-the art sub-models to describe the most important phenomena occurring in H2 spark ignition engines and to support the experimental analysis.
Experimental results show that the PFI configuration provides efficiency and emissions benefits at the expense of volumetric efficiency. The proposed CFD model demonstrates the ability to successfully simulate different engine operating conditions for both PFI and DI systems. In particular, it is shown that the charge stratification typical for DI systems is not beneficial for the studied configuration as it increases wall heat losses and NOx formation.

For further information please contact the coordinator, Lukas Virnich, FEV; virnich[@]

You may also download the presentation on Single cylinder activities on H2 combustion given during the Advisory Board meeting on 21 Nov.2022: LONGRUN_AdvisoryBoard_Meeting_Nov.22_H2CombustionHighlights_FEV