Description
Saab Trionic’s ignition system consists of an ignition cassette with four ignition coils, one for each spark plug. The ignition system is capacitive. The spark plugs are used as sensors to detect combustion and pre-ignition/pinging. This renders camshaft position detector and knock sensor redundant. This function also enables effective detection of misfires, which is an OBD II demand. The fuel injection is fully sequential and is dependent on the MAP (Manifold Absolute Pressure). Boost pressure control (L and R engines) utilises a solenoid valve pneumatically connected to the turbocharger’s waste gate.
The system was fitted on models Saab 900, Saab 9000 and Saab 9-3. This information is however most accurate for the SAAB 900.
Read more about this topic: Trionic T5.5
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