DOC AIRBUS | AMM A320FIGNITION - GENERAL - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The ignition system consists of 2 independent systems : 2 high energy ignition exciters for which the energization is controlled by the EEC, 2 igniter plugs, and 2 coaxial shielded ignition leads.
The purpose of the system is:
** ON A/C NOT FOR ALL The ignition system consists of 2 independent systems : 2 high energy ignition exciters for which the energization is controlled by the EEC, 2 igniter plugs, and 2 coaxial shielded ignition leads.
Component LocationThe purpose of the system is:
- to produce an electrical spark to ignite the fuel air/mixture in the engine combustion chamber during the starting cycle on ground and in flight.
- to provide continuous ignition (manual or automatic selection) during take off, landing and operation in adverse weather conditions.
Continuous ignition will also be automatically selected when the EIU is failed.
2. Description
The 2 ignition exciters are mounted on the outer surface of the HP compressor.
Each unit has one power input circuit, (4 joules stored) and a high voltage output circuit to the igniter.
The two igniter plugs are installed on the diffuser case.
The igniter plug has 3 sections:
The other providing the return path from the igniter body to the case of the exciter.
** ON A/C NOT FOR ALL The 2 ignition exciters are mounted on the outer surface of the HP compressor.
Each unit has one power input circuit, (4 joules stored) and a high voltage output circuit to the igniter.
The two igniter plugs are installed on the diffuser case.
The igniter plug has 3 sections:
- the Sparking end with the surface gap
- the Main body with the plug thread.
- the Connector to connect the ignition lead
The other providing the return path from the igniter body to the case of the exciter.
3. Operation
The ignition exciters operate with 115V -400Hz input. The power is transformed, rectified and discharged in the form of capacitor discharge pulses through the ignition leads to the igniter plugs. Each ignition system can operate independently. The selection of the system (A or B) is made by the EEC in autostart only. Ignition system A comprises the upper ignition exiter and its associated cable and igniter, ignition system B comprises the lower ignition exiter and its associated cable and igniter.
** ON A/C NOT FOR ALL The ignition exciters operate with 115V -400Hz input. The power is transformed, rectified and discharged in the form of capacitor discharge pulses through the ignition leads to the igniter plugs. Each ignition system can operate independently. The selection of the system (A or B) is made by the EEC in autostart only. Ignition system A comprises the upper ignition exiter and its associated cable and igniter, ignition system B comprises the lower ignition exiter and its associated cable and igniter.
4. Component Location
| ------------------------------------------------------------------------------ |
| FIN ! FUNCTIONAL DESIGNATION ! PANEL ! ZONE ! ACCESS ! ATA |
| ! ! ! ! DOOR ! REF. |
| ------------------------------------------------------------------------------ |
| 4000JH1 EXCITER-IGNITION, A/ENG 1 454 452AR 74-11-38 |
| 4000JH2 EXCITER-IGNITION, B/ENG 1 454 452AR 74-11-38 |
| 4001JH1 PLUG-IGNITER, A 454 452AR 74-21-41 |
| 4001JH2 PLUG-IGNITER, B 454 452AR 74-21-41 |
| 4002JH1 LEAD-IGNITION, A 454 452AR 74-21-43 |
| 4002JH2 LEAD-IGNITION, B 454 452AR 74-21-43 |