What does ISG engine auto start-stop mean?

[FranciscoFitz]

ISG engine auto start-stop automatically shuts off the engine when the vehicle comes to a temporary stop during driving. Below is an introduction to the auto start-stop system: 1. Introduction: The engine auto start-stop system automatically shuts off the engine when the vehicle temporarily stops during driving. When it's time to move forward again, the system automatically restarts the engine. 2. Development History: This technology first appeared as early as the mid-1970s. At that time, Toyota conducted practical tests on this technology with its Crown sedan - the engine would automatically cut fuel and shut off 1.5 seconds after the vehicle came to a complete stop, which became the theoretical and design prototype for future auto start-stop systems. This Crown model underwent extensive testing in Tokyo's urban traffic, proving that this technology could achieve approximately 10% fuel savings.