Search Results

Low speed pre-ignition (LSPI) is a limiting phenomenon for several of the technologies being pursued as part of the low carbon agenda. To achieve maximum power density and efficiency engines are being downsized and turbocharged, while Direct- injection technologies are becoming ever more prominent. All changes that increase the propensity of LSPI. The low speed-high load operation envelope is limited due to LSPI. Hydrogen engines are also being explored, however, with such a low minimum enthalpy of ignition, LSPI is a major limitation to thermal efficiency. Several techniques are utilized in this study to investigate physical and physio-chemical aspects of lubricant initiated LSPI. Where possible attempts have been to validate methodologies or directional alignment with published data. The basis of the methodologies used is a validated 1D predictive combustion model of a single cylinder GTDI engine, that was used to provide simulation boundary conditions.