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 Park campus. Innovation Park at Notre Dame facilitates commercialization of many forms of research, by convening innovators throughout the entire Notre Dame community and beyond. Companies formed at Innovation Park may choose to expand their operations at Ignition Park, and by doing so, they'll continue to receive support services and other benefits from being part of the same state-certified technology park. Ignition Park sits on the grounds of the former Studebaker plant. It will concentrate on high-potential technologies and ventures, as well as the commercialization of nanotechnology concepts inspired by MIND. Ignition Park Ignition Park is a technology park under development