What is the 'A' in a circle on the car?

[SanJaxson]

It is the STT Intelligent Fuel-saving System, which is a system that controls the engine start and stop. Below is relevant information about the STT Intelligent Fuel-saving System: 1. Introduction to the STT Intelligent Fuel-saving System: STT is short for STOP&START. The STT Intelligent Fuel-saving System is a system that controls the engine start and stop. The system uses a computer to determine the vehicle's status, such as when the vehicle is in a stopped state due to a red light or traffic jam. The computer can control the engine to automatically stop running, and during the stop phase, it does not affect the use of in-car devices like the air conditioner or audio system. 2. Function of the STT Intelligent Fuel-saving System: By implanting an enhanced motor with idle start-stop functionality into a traditional engine, the system ensures that the engine completely shuts off when the vehicle meets the idle stop conditions. When the vehicle needs to start moving again, the idle start-stop motor system quickly responds to the driver's start command, rapidly starting the engine for seamless transition, thereby significantly reducing fuel consumption and exhaust emissions.