Electronic Ignition System (EIS)
The EIS monitors the engine for detonation. If detonation occurs, the EIS control module will retard the timing. If the detonation continues, the EIS control module will request a shutdown. The system that receives the request for a shutdown varies depending on the engine's configuration.
If the engine is equipped with a Remote Control Panel (Status), the request for a shutdown is sent to the Status Control Module (SCM). The SCM will terminate the flow of fuel. The SCM will also send a request to the EIS control module in order to terminate the ignition.
If the engine is not equipped with a Remote Control Panel (Status), the request for a shutdown is sent to the customer's equipment. The customer's equipment must terminate the fuel flow. The customer's equipment must also send a request to the EIS control module in order to terminate the ignition.
The remote control panel (status) provides protection against the following conditions:
- Low oil pressure
- High oil temperature
- Overspeed
- Overcrank
When one of the above faults occurs, the SCM sends a command to the gas shutoff valve in order to stop the flow of fuel. If the engine does not shut down, the SCM sends a command to the EIS control module in order to terminate the ignition.
When an emergency stop button is pressed, the SCM immediately sends commands in order to terminate the fuel flow and the ignition.
Refer to Systems Operation/Testing and Adjusting, SENR6538, "Electronic Control System Operation".