What does auto start-stop in cars mean?

[DeHailey]

Auto start-stop in cars refers to a system that automatically shuts off the engine when the vehicle comes to a temporary stop during driving and restarts it when needed to continue moving. The core of auto start-stop lies in the automatic control of engine shutdown and restart, aiming to reduce unnecessary fuel consumption, lower emissions, and improve fuel economy. This feature is primarily designed for urban traffic situations, such as waiting at traffic lights or during traffic congestion, to minimize engine idling time. Additionally, when the engine is off, the vehicle's electrical system can power the engine cooling fan and air conditioning, replacing the function of the belt pulley.