Idling Saves Fuel or Start-Stop Saves Fuel?

[LaLena]

Start-stop is based on road conditions, not to be used at every intersection or every time you stop. For traffic lights lasting more than twenty seconds, start-stop can save fuel; for those around ten seconds, idling saves fuel. Overall, using start-stop results in fuel savings. Vehicle's automatic start-stop technology: A secondary start sensor is installed on the starter. When the computer detects that the brake is pressed while waiting at a red light, the vehicle automatically shuts off to improve fuel economy. When ready to move, the computer sends a signal to the secondary start sensor, and the vehicle automatically starts. More advanced vehicles use capacitors instead of the starter for this process, which better extends the starter's lifespan. Main function of start-stop: It allows the vehicle's engine to automatically stop during brief stops and restart when the brake is released to resume driving, achieving fuel savings when the vehicle is stationary.