What does engine start-stop mean?

[VonJesse]

Engine start-stop is a very practical automotive energy-saving and emission-reduction technology. It automatically shuts off the engine when the vehicle comes to a temporary stop during driving (such as waiting at a red light). When it's time to move forward again, the system automatically restarts the engine. There are two main types: 1. Basic start-stop technology: The engine automatically turns off when the car encounters a red light or traffic jam, and promptly restarts when the driver releases the brake pedal or steps on the clutch (or accelerator pedal). 2. Advanced start-stop technology: Equipped with brake energy recovery function, it can convert part of the braking energy into electricity to charge the battery. In hybrid vehicles, the start-stop system is an important component of the powertrain.