What are the main functions of governor systems?

Governor systems play a critical role in regulating engine speed and ensuring optimal performance under varying load conditions. The main function of a governor is to protect the engine from exceeding its maximum safe RPM (revolutions per minute), which could lead to mechanical failure or damage. By sensing the engine speed and adjusting the throttle position accordingly, the governor can modulate the engine's output to keep it operating within safe limits.

In essence, the governor automatically adjusts the fuel supply or air intake to maintain a stable engine speed, particularly when the load changes. This function is vital in applications where engine speed must be controlled closely to ensure safe operation, such as in lawn mowers, generators, or other small engines that might encounter variable load conditions.

While there may be benefits associated with increased performance, reduced emissions, or improved fuel economy, these are not the primary functions of governor systems. Their primary focus is on speed control and engine protection, which underscores the importance of option B.