What does ISG engine auto start-stop mean?
4 Answers
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.
The ISG engine start-stop system is a technology that automatically turns off the engine when the vehicle stops and restarts it when moving off. I've used a car with this feature—it's so quiet when the engine stops at a red light, and with a light press on the accelerator at green, it starts and moves instantly with almost no vibration. It directly drives the engine flywheel via an integrated starter-generator, much faster than traditional starters. The fuel-saving effect is noticeable too—last week, driving 40 km round trip to the city for groceries, it saved half a liter of fuel. This system also recovers braking energy to charge the battery, even maintaining the air conditioning with electricity after engine shutdown. However, I turn it off when driving through waterlogged roads in the rain to prevent accidental engine restart and water intake.
Previously driving a hybrid Camry with ISG start-stop, the most satisfying part was the engine resting during traffic jams, saving fuel and keeping quiet. This technology integrates the starter and generator into a single motor, sandwiched between the engine and transmission. At long red lights, it shuts off the engine and restarts instantly when releasing the brake, almost seamlessly. I calculated it saves about 800 yuan in fuel annually, and the battery is more durable than in regular cars. It recovers energy from downhill or braking, converting it into electricity stored in the 48-volt battery. However, with heavy AC use in summer, the system prioritizes power preservation, occasionally increasing the auto-start frequency.
ISG start-stop is a technology that replaces the traditional starter with an electric motor. It saves fuel by shutting off the engine at red lights and starts up in milliseconds without any jerking when moving off. I often get stuck on the elevated roads during my commute, and this feature saves me half an hour of idling fuel consumption every day. Its core is a high-power motor integrated on the engine crankshaft, powered by a 48-volt battery. Not only does it enable quick start-stop, but it also assists in acceleration at low speeds. However, using air conditioning for cooling can affect the duration of engine shutdown, so it's recommended to set a slightly higher temperature in hot weather to balance energy consumption. It works great for daily driving, but the benefits are less noticeable on long trips.
