The main technologies of automotive lightweighting include the following:

1. Use lightweight materials: such as aluminum alloy, carbon fiber composite materials, etc. These materials have relatively low density and can reduce the overall weight of the car. Meanwhile, 

these materials possess excellent mechanical properties and can achieve lightweighting while ensuring the strength and safety performance of automobiles.

2. Optimized design: By optimizing the structure of the vehicle, unnecessary components and weight can be reduced, and the utilization rate of materials can be improved. For instance, it adopts 

an integral body structure, tubeless tires, etc.

3. Electronic Control System: By introducing an advanced electronic control system, precise control of the vehicle's power system is achieved, improving fuel efficiency and reducing emissions, 

thereby realizing the goal of lightweighting. For instance, technologies such as intelligent throttle control and engine shutdown.

4. Energy-saving technologies: By adopting efficient energy-saving technologies such as start/stop systems and regenerative braking, the energy consumption of automobiles can be reduced, 

thereby achieving the goal of lightweighting.

5. Aerodynamic optimization: By optimizing the design of the vehicle's exterior, air resistance is reduced and fuel efficiency is improved, thereby achieving the goal of lightweighting. For example,

streamlined body, diffusers, etc.