Electric System (Ignition, Generators) - Rotax 914 F Maintenance Manual

9.4)

Electric system (Ignition, generators)

See Pic. 21.
The ROTAX 914 F is equipped with a breakerless Dual Capacitor Discharge Ignition
(DCDI).
The ignition unit is completely free of maintenance and needs no external power
supply.
Two independent charging coils Q located on the generator stator supply one ignition
circuit each. The energy is stored in capacitors of the electronic modules W. At the
moment of ignition 2 each of the 4 external trigger coils E actuate the discharge of the
capacitors via the primary circuit of the dual ignition coils R.
NOTE:
T
Q
E
E
The standard equipment includes also an internal generator with external rectifier-
regulator (12V 20A DC).
For more power demand installation of an external alternator (12V 40A DC) is feasible.
NOTE:
Date
Page
1997 02 01
48
trigger coil T is provided for the rev-counter signals.
th
The 5
E
E
Pic. 21
A rectifier-regulator is already integrated in the alternator.
Main
914 F
Ignition circuit A (top spark plug)
W
W
Ignition circuit B (bottom spark plug)
Reference
R
3T
4T
1T
2T
R
R
1B
2B
3B
4B
R
00132
Modification no.
- 0 -