What is the role of a speed sensor in a tacho-gen system?

In a tacho-generator system, the role of a speed sensor is crucial for monitoring and providing feedback on the engine's RPM (Revolutions Per Minute). This feedback is essential because it allows for precise control of the engine's operation, which is vital for maintaining optimal performance and efficiency.

By measuring the RPM, the speed sensor helps in ensuring that the engine operates within its designed limits. This information can be used by the engine control unit to make real-time adjustments, enhancing performance and responsiveness. Additionally, this feedback is integral to various safety and control systems that might adjust fuel flow, airflow, or other parameters based on the RPM readings.

In contrast, the other options do not align with the primary function of the speed sensor. Fuel consumption measurement typically involves a flow sensor, while airflow regulation is managed by different components within the combustion system. Engine temperature control relies on temperature sensors and cooling system management, which are separate from the functions of a speed sensor.