Lesson plan
Trionic
Trionic is an engine management system developed by Saab Automobile. It consists of an engine control unit (ECU) that controls ignition timing, fuel injection, and acts as a boost controller.The name 'Trionic' is a portmanteau of the numerical prefix 'tri-' (meaning 'three') and 'ion' from the fact that it uses ion current. This ion current is measured by the spark plugs between combustion events which acts as a sensor for knock, misfire and synchronization detection. The ion current stream which was developed within the ion sensing system due to combustion can be deduced by monitoring the secondary current of the ignition coil. Using the value and wave shape of the current, after the actual spark event, the quality of the actual combustion process is determined, thus allowing the engine control unit to optimize the timing of the spark for the best engine performance while keeping emissions low on a much wider range of rpms. Since Trionic 7, the throttle and thereby the air charge has also been electronically controlled, but the name "Trionic" was not changed accordingly as it was determined that the name had value.
Article summary
Trionic is an engine management system developed by Saab Automobile. It consists of an engine control unit (ECU) that controls ignition timing, fuel injection, and acts as a boost controller.The name 'Trionic' is a portmanteau of the numerical prefix 'tri-' (meaning 'three') and 'ion' from the fact that it uses ion current. This ion current is measured by the spark plugs between combustion events which acts as a sensor for knock, misfire and synchronization detection. The ion current stream which was developed within the ion sensing system due to combustion can be deduced by monitoring the secondary current of the ignition coil. Using the value and wave shape of the current, after the actual spark event, the quality of the actual combustion process is determined, thus allowing the engine control unit to optimize the timing of the spark for the best engine performance while keeping emissions low on a much wider range of rpms. Since Trionic 7, the throttle and thereby the air charge has also been electronically controlled, but the name "Trionic" was not changed accordingly as it was determined that the name had value.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.