How many AFES optical sensors are located in the engine compartment?

How many AFES optical sensors are located in the engine compartment?

• A. 4 in the engine compartment
• B. 3 in the engine compartment
• C. 2 in the engine compartment
• D. 5 in the engine compartment

Answer: (B)

Flame detection in the engine compartment relies on multiple optical sensors to monitor all critical zones effectively. The AFES system uses three sensors arranged to provide overlapping viewpoints, so a flame anywhere in the engine area is likely to be seen quickly. This setup balances reliable coverage with practical wiring and maintenance. With only two sensors, there’s a higher risk a flame could be unnoticed if it sits between viewpoints or behind a component. Adding more than three wouldn’t significantly improve detection and would add unnecessary complexity. So, three AFES optical sensors in the engine compartment is the standard, optimal arrangement.

Flame detection in the engine compartment relies on multiple optical sensors to monitor all critical zones effectively. The AFES system uses three sensors arranged to provide overlapping viewpoints, so a flame anywhere in the engine area is likely to be seen quickly. This setup balances reliable coverage with practical wiring and maintenance. With only two sensors, there’s a higher risk a flame could be unnoticed if it sits between viewpoints or behind a component. Adding more than three wouldn’t significantly improve detection and would add unnecessary complexity. So, three AFES optical sensors in the engine compartment is the standard, optimal arrangement.