GF15.15-P-3102MOR Component Description For ECI Ignition System Power Pack

GF15.15-P-3102MOR Component Description For ECI Ignition System Power Pack
ENGINE 275.9 in MODEL 230.4 as of model year 2009 / AEJ 08 model refinement package





View of the engine from above
5/1 Charge air cooler, LH cylinder bank
5/2 Charge air cooler for right cylinder bank
121/1 Air filter, LH cylinder bank
121/2 Air filter, RH cylinder bank
M16/6 Throttle valve actuator
N91 ECI ignition system power pack

Location
The power pack is located on the center of the engine.

Task
The power pack generates the necessary ignition voltages for the ECI ignition system of about twice 180 V and the auxiliary voltages for ionic current measurement of about twice 23 V.





Design
View of power pack with plastic cover detached

N91 ECI ignition system power pack

The power pack consists of a die-cast aluminum housing with plastic cover.
The power pack contains the DC voltage converters, which are made up mainly of condensers, coils, transistors and integrated circuits (ICs).





Pin and connector assignments

1 Pin 1: not used
2 Pin 2: not used
3 Pin 3: not used
4 Pin 4: power supply for circuit 87 M1
5 Pin 5: power supply for circuit 87 M1
6 Pin 6: not used
7 Pin 7: auxiliary voltage of 23 V approx. for RH ignition module
8 Pin 8: auxiliary voltage of 23 V approx. for LH ignition module
9 Pin 9: voltage of 180 V approx. for RH ignition module
10 Pin 10: not used
11 Pin 11: ground for RH ignition module
12 Pin 12: circuit 30 for RH ignition module
13 Pin 13: circuit 30 for LH ignition module
14 Pin 14: ground for LH ignition module
15 Pin 15: not used
16 Pin 16: voltage of 180 V approx. for LH ignition module

N91 ECI ignition system power pack

Function
The DC voltages generated by the DC voltage converter have a load-dependent duty cycle of about 10 to 90 %. The frequency is about 20 kHz for a voltage of 180 V and about 65 kHz for a voltage of 23 V.
The ECI ignition system power pack is equipped with an electronic overload protection for both voltages. In case of short circuit or overload, the voltage outputs are switched off. They are then blocked until the ignition is switched on again.

Assembly operations
To prevent damage, the ignition should not be switched on without a ground connection at the power pack. The ground connection is through the housing.