What is the difference between an integrated subframe and a full-frame subframe?
1 Answers
The following are the differences between an integrated subframe and a full-frame subframe: 1. Difference in comfort: The subframe can make the chassis more integrated and reduce impact, so its primary function is to improve comfort. In this regard, the full-frame subframe has the most significant advantage. However, the stiffness adjustment of the subframe will also directly affect comfort. If the subframe mounting is designed to be softer, it can effectively isolate vibrations generated during driving, but it will reduce support stiffness, especially noticeable during high-speed cornering. On the other hand, a stiffer subframe mounting can provide high connection rigidity but has limited effectiveness in isolating vibration and noise. 2. Difference in safety: The full-frame subframe also enhances impact resistance due to the addition of longitudinal beams. For high-speed frontal collisions, some subframes are designed with a detachment feature. This design is more common in full-frame subframes. During severe high-speed frontal collisions, the front subframe absorbs kinetic energy and disconnects from the body, allowing the engine to sink smoothly without squeezing into the cabin, thereby increasing the deformation and energy absorption space in the engine compartment. 3. Difference in lightweighting: A bulky subframe will increase vehicle weight. To balance these characteristics, the advantages of an aluminum alloy subframe become apparent. 4. Difference in durability: Generally speaking, the durability of subframes is reliable. To ensure safety, subframes are designed with a series of durability tests. For example, since the subframe is subjected to force during braking, a braking force durability test needs to be designed.
