Does Auto Start-Stop Save Fuel or Waste Fuel?

[Pauline]

Under conditions where the auto start-stop system is operational, it can save fuel and reduce exhaust emissions. Engine start-stop refers to a system that automatically shuts off the engine when the vehicle comes to a temporary stop, such as at a red light. When the car needs to move forward again, the system can automatically restart the engine. Below is relevant information: Characteristics of Start-Stop Technology: Basic start-stop technology automatically turns off the engine when the car encounters a red light or traffic jam. The engine promptly restarts when the driver releases the brake pedal or presses the clutch (or accelerator pedal). More advanced start-stop systems also feature brake energy recovery, which can convert part of the braking energy into electricity to recharge the battery. Function of Engine Start-Stop: Used during low-speed driving and repeated stops, it can automatically shut off the engine to avoid unnecessary fuel consumption. It also reduces the car's idle time, which in turn decreases engine carbon buildup, benefiting both environmental protection and the engine's lifespan.