Brief description: Overview
- Trionic T8 control module (589)
- Generator (2)
- Ignition switch (20)
- Switch, brake lights (29)
- Pressure monitor, engine oil (44)
- Level sensor, fuel (46)
- Fuel pump motor (323)
- Fuel pump relay (102)
- Main relay, engine management system (229)
- Secondary air injection pump relay (324)
- Oxygen sensor preheating relay (443)
- Main fuse box, petrol engine (727)
- Switch, clutch, cruise control (133)
- Switch, brakes, cruise control (134)
- Solenoid valve, charge air (179a)
- Coolant temperature sensor (202)
- Mass air flow sensor (205)
- Injector, cyl. 1-4 (206a-c)
- Level monitor, engine oil (243)
- Ignition coil with integrated power module, cyl. 1-4 (320a-c)
- EVAP canister purge valve (321)
- Secondary air injection pump motor (326)
- Relay, A/C compressor (156)
- Relay, start relay (517)
- Crankshaft position sensor (345)
- Accelerator position sensor (379)
- Manifold absolute pressure sensor (431)
- Diagnostic output, 16-pin, CARB (445)
- Pressure sensor, atmospheric pressure (539)
- EVAP pressure sensor (585)
- EVAP shut -off solenoid valve (588)
- Front heated oxygen sensor (592)
- Rear heated oxygen sensor (593
- Exhaust temperature sensor (602)
- Throttle body actuator (604)
- Wastegate valve (605)
- Pressure sensor, A/C (620)
- Intake manifold sensor (688)
- CIM (703)
- Power steering fluid pressure switch (739)
- CDM (740)
Saab Trionic T8 has been developed by Saab and is a very advanced engine management system. ECM is used principally to regulate the air mass, fuel and ignition timing.
As the driver depresses the accelerator pedal, it acts on a pedal position sensor integrated in the pedal bracket.
This information in the form of a voltage is connected to ECM, which converts the voltage value to a torque request from the driver.
The torque request is then processed by ECM with regard to current operating conditions and limitations. The result is an air mass request to achieve the torque requested by the ECM. The driver's requested torque can be higher than that requested by ECM when, for example, maximum engine torque at the current operating point has already been attained, TCS modulation, knock control.
ECM regulates the throttle area (opening angle) together with the turbo (wastegate) so that the correct torque is attained, i.e. air mass per combustion.
This system has the following advantages:
- Turbocharger delay can be almost eliminated
- Exhaust emissions reduced during changes in load
- Idle speed control is integrated
- Load compensation is possible over the entire load and engine speed range
- Efficient engine torque limitation over the entire load and engine speed range
- Cruise control can easily be integrated in the system
Fuel injection is sequential and regulated with air mass per combustion and engine speed as parameters.
Ignition takes place with individual ignition coils placed on the respective spark plug. The spark plugs together with the ignition coils and CDM are used to detect combustion and possible knocking.
This means there is no need for a camshaft position sensor or separate knock sensor.
Compared with the earlier Trionic T7, the following functions are new: