What does a car and a lock symbol displayed on the car mean?

[AubreeRose]

When a car and a lock symbol are displayed on the car, it indicates the engine immobilizer system. The engine immobilizer system ensures that the engine can only be started when using a key recognized by the system. The car engine anti-theft system is a set of measures designed to prevent car theft, unauthorized movement, and loss of items inside the vehicle. It can be categorized structurally into: mechanical, electronic, and network-based systems. The function of the engine is to convert the thermal energy of gasoline into mechanical energy by burning the fuel in a sealed cylinder, causing the gas to expand and push the piston to perform work. Engine types include: 1. Based on fuel usage: gasoline engines and diesel engines; 2. Based on stroke: four-stroke internal combustion engines and two-stroke internal combustion engines; 3. Based on cooling method: water-cooled engines and air-cooled engines; 4. Based on cylinders: single-cylinder engines and dual-cylinder engines; 5. Based on the intake system: naturally aspirated engines, turbocharged engines, and supercharged engines.