2. Front and rear suspension system: The lower bracket also includes the support structure of the front and rear suspension system.
3. Engine support structure: The engine of an automobile is usually located at the front and fixed to the vehicle through the support structure of the lower bracket.
4. Transmission system support: The lower bracket also bears the supporting role of the transmission system. The transmission system includes a transmission, a transmission shaft and a differential, which are connected with the engine through the support points on the lower bracket to transmit power to the wheels.