10.  Closure

Research towards the development of internal combustion engine having high fuel conversion efficiency and ultralow emissions is driven by stringent emission legislations, degradation of ambient environmental conditions, depletion of fossil resources, energy security and global warming. The low temperature combustion (LTC) engines are one of the potential options to fulfil the objective of high fuel conversion efficiency along with ultralow emissions of NOx and particulate matter. The LTC engines are radically different from conventional spark ignition and compression ignition engines. Research has been conducted on various LTC concepts using conventional and alternative fuels on both light-duty (LD) and heavy-duty (HD) engines. Performance, combustion and emissions characteristics along with different control strategies of LTC engines are discussed in previous chapters of the present book. Summary of main findings regarding performance, combustion and emissions characteristics of various LTC strategies is presented in this chapter, and recommendations for further work are also outlined.