What does the alternator do?

What does the alternator do?

• A. Charges the battery and powers electrical systems
• B. Stores energy for later use
• C. Sends signals to the ECU only
• D. Removes heat from the engine

Answer: (A)

The alternator’s job is to generate electrical power for the vehicle while the engine is running and to keep the battery charged so there’s energy available for starting and for the electrical system. It is driven by the engine and, with the voltage regulator, converts mechanical energy into DC electricity that feeds the car’s lights, ignition, ECU, radio, and other components, while also topping off the battery. Storing energy for later use is the battery’s role, not the alternator. Sending signals to the ECU comes from sensors and controllers, not from the alternator. Removing heat from the engine is handled by the cooling system, not the alternator.

The alternator’s job is to generate electrical power for the vehicle while the engine is running and to keep the battery charged so there’s energy available for starting and for the electrical system. It is driven by the engine and, with the voltage regulator, converts mechanical energy into DC electricity that feeds the car’s lights, ignition, ECU, radio, and other components, while also topping off the battery.

Storing energy for later use is the battery’s role, not the alternator. Sending signals to the ECU comes from sensors and controllers, not from the alternator. Removing heat from the engine is handled by the cooling system, not the alternator.