Trionic/LH-DI/APC Comparison

Trionic/LH Comparison:

Briefly, the most important differences between the TRIONIC SF1 system and the earlier LH multiport fuel injection and DI/APC electronic ignition/boost pressure control systems can be summarized as follows:


^ two control modules are replaced by one only

^ the mass air flow sensor is replaced by a manifold absolute pressure sensor for measuring the pressure in the intake manifold and an intake air temperature sensor for measuring the air temperature just ahead of the intake manifold.

^ the separate external knock sensor is replaced by an integrated knock sensor function in the ignition discharge module (ignition cartridge)

^ sequential (individual) control of each injector

^ twin-jet injectors

^ repositioned three way catalytic converter to reduce HO emissions and as a step towards meeting future OBD II requirements (USA, Scandinavia) *)

^ the fuel rail pulsator is no longer filled.


*)OBD II (On-Board Diagnostic II) is edition 2 of the applicable rules for inspecting, diagnosing and fault tracing emission-related functions and components with environmental requirements as the point of departure.