What is Auto Start-Stop in Cars?
2 Answers
Auto Start-Stop technology in vehicles automatically shuts off the engine when temporarily stopped during driving (e.g., at red lights). When ready to proceed, the system automatically restarts the engine. Its English name, STOP&START, is abbreviated as STT. The STT intelligent fuel-saving system controls engine starting and stopping. More details: 1. The system works when the vehicle stops due to traffic or at intersections. The driver presses the brake pedal and shifts to neutral. The Start/Stop system then checks: engine idling without gear engagement; wheel speed sensors in the anti-lock system show zero; the electronic battery sensor indicates sufficient energy for the next start. 2. When these conditions are met, the engine stops automatically. At green lights, pressing the clutch activates the starter, quickly restarting the engine. In automatic transmission models, releasing the brake or turning the steering wheel immediately reignites the engine, allowing acceleration while remaining in Drive (D) mode.
As a regular city driver, the auto start-stop function is something I encounter daily. Simply put, when your car comes to a complete stop—like at a red light or in traffic—the engine automatically shuts off. Then, as soon as you release the brake or press the accelerator, it instantly restarts to continue driving. This feature is especially practical for urban driving, significantly saving fuel in areas with frequent stops—I’ve compared it with the function turned off and found that each tank of gas lasts about 50 kilometers longer. It’s not just about saving money; it also reduces exhaust emissions, making it more environmentally friendly. At first, the quietness when the engine stops might feel unusual, but you get used to it. The key is that it’s fully automatic, with sensors detecting when the car is stationary, so the driver doesn’t need to worry. Occasionally, there’s a slight vibration upon restarting, but overall, it doesn’t affect comfort. I recommend new car owners keep it on—no need to worry about engine wear, as the system is designed to be safe and reliable.
