What is the purpose of engine start-stop technology?
2 Answers
Engine start-stop technology serves to automatically shut off the engine when the vehicle comes to a temporary stop during driving, and then restart it when movement is required to continue. This is a new technology capable of automatically controlling engine shutdown and ignition, with the primary goal of putting the engine into automatic hibernation during brief stops to achieve fuel savings and emission reduction. To some extent, the automatic start-stop function also promotes standardized driving practices—it won't activate unless the seatbelt is fastened. Conversely, if the seatbelt is unfastened after stopping, the engine won't restart even if the brake is released or the accelerator is pressed. The automatic start-stop function prioritizes safety and reliability, with fuel efficiency being a secondary consideration. It only delivers its energy-saving and emission-reducing benefits when all conditions meet the minimum standards.
Having driven for nearly a decade, I've found that the most immediate effect of auto start-stop is the engine automatically shutting off when waiting at red lights. During downtown traffic jams, watching a one-minute red light with a long line of cars idling and burning fuel, this feature can save at least 5%-10% in fuel consumption. Calculated over time, it saves dozens of dollars in fuel costs each month, making it quite cost-effective in the long run. Moreover, urban exhaust pollution mainly comes from idling emissions, and this technology helps reduce carbon dioxide and nitrogen oxide emissions. Although there's a slight vibration upon restarting, newer models now generally use reinforced starters and AGM batteries, significantly improving reliability compared to a decade ago. I recommend that beginners lightly press the accelerator two seconds before the green light to pre-warm and start the engine, ensuring a smooth and timely departure.
