Pre-ignition Pre-ignition Pre-ignition (or preignition) in a spark-ignition engine is a technically different phenomenon from engine knocking, and describes the event wherein the air/fuel mixture in the cylinder ignites before the spark plug fires. Pre-ignition is initiated by an ignition source other than the spark, such as hot spots in the combustion chamber, a spark plug that runs too hot for the application, or carbonaceous deposits in the combustion chamber heated to incandescence by previous engine combustion events. The phenomenon is also referred to as 'after-run', or 'run-on' or sometimes dieseling, when it causes the engine to carry on running after
Ignition SCADA tags as well as altering the logging rate dynamically. This allows the system to store high resolution history when needed, but lower resolution data for other periods. The system automatically partitions data into multiple database tables. This accomplishes two functions: ensures consistent performance over the long term, and provides a consistent mechanism for data archival and pruning. The Ignition platform uses scripting to allow designers to add flexibility and customization. There are two major scripting languages in Ignition, Python and the "Expression Language". Ignition uses an implementation of Python version 2.5 called Jython. Python script is used for component Event