An electronic engine speed sensor in a governor system is connected to which component?

The electronic engine speed sensor in a governor system is primarily connected to the engine control unit (ECU). This connection enables the ECU to receive accurate data about the engine's speed, which is crucial for efficient engine management and performance. The ECU processes the data to regulate various functions, such as fuel injection and ignition timing, ensuring that the engine operates smoothly and efficiently.

Utilizing the engine speed sensor's input, the ECU can respond to changes in engine load, allowing for adjustments to maintain optimal speed and performance. This communication is essential for modern engines where precise timing and fuel management are critical for engine efficiency and emissions control. As the other components listed, such as the fuel injection system, ignition coil, and throttle body, may receive indirect influences based on the ECU’s management decisions, they do not serve as the direct connection point for the engine speed sensor. The ECU acts as the central hub for data processing and control in this context.