WebHowever, differences in the knocking phenomena of the SI engine and the CI engine should also be care fully be noted: 1. In the SI engine, the detonation occurs near the end of combustion where as in the CI engine detonation occurs near the beginning of combustion as shown in fig. 6.10. 2. The detonation in the SI engine is of a homogeneous ... WebAbnormal Combustion: In Internal combustion engines, abnormal combustion is a significant phenomenon associated with the combustion processes on which the life and performance of the engine depends. The two important abnormal combustion phenomenons are 1. KNOCK and 2.SURFACE IGNITION.
Reasons behind knocking in CI engines - EnggStudy
Web• Comparison of Knocking in SI and CI Engines Parameter SI Engines CI Engines Timing Occurs at the end of combustion Occurs at the beginning of ... compressed • Parameters which reduce knocking in SI and CI Engines S.No. Parameter SI Engines CI Engines 1 Self Ignition Temperature of fuel High Low 2 Ignition Delay Long Short 3 Inlet ... WebKnock occurrence in a turbo-charged SI engine was characterised both numerically and experimental by Galloni et al with an insight in the positioning of pressure transducers for knock tests. 8.3 Factor Influencing Knock Onset in Engines Knock in SI engine is an abnormal combustion phenomenon which is undesirable to engines manufacturers and … penticton directory
Comparative analysis of exhaust gases obtained in Si and …
WebJun 6, 2008 · Compression ratio for the fuel: In the case of SI engines, the compression ratio of the fuel is in the range of 6 to 10 depending on the size of the engine and the power to be produced. In CI engines, the compression ratio for air is 16 to 20. The high compression ratio of air creates high temperatures, which ensures the diesel fuel can self ... WebJun 10, 2015 · In general ,in the engine map of a modern SI engine, the incoming knok is usually present. The high velocity knock, usually called detonation ,will produce severe … WebSep 28, 2014 · Abstract and Figures. This paper compares the formation of various pollutants such as NO x , CO, Particulates in a low nitrogen oxycombustion environment in Spark-ignited (SI) and Compression ... penticton district society community living