Simulation of Spark-Ignited Engines with Water Injection using the Stochastic Reactor Model, 37th International Symposium on Combustion

The general knowledge from SI engine development could be confirmed by the QD SRM optimization. The reduction of fuel consumption is favored by increased compression ratio and earlier spark timing. In contrast, the lower knock probability is influenced by low compression ratios and later spark timings. The presence of water is beneficial for reducing fuel consumption and knock probability at the same time. An optimum w/f ratio in the range of 25% to 30% is found for this operating condition. Acknowledgments The presented work is carried out within the FVV research project 1256 "Water Injection in SI Engines". The authors gratefully acknowledge the support received from the Research Association for Combustion Engines (FVV) eV and from all project participants.