 
        Adjustment of support strength
By controlling the inflation and deflation of the lumbar support airbag (or the pressure of the hydraulic system), the protrusion of the lumbar support can be adjusted to adapt to the waist curves of passengers with different body types.
Dynamic pressure maintenance
The lumbar support valve of some models can automatically maintain the pressure inside the airbag, avoiding the attenuation of support force due to long-term use.
Fault protection
When there is a leak or circuit failure in the system, the lumbar support valve can prevent a sudden drop in pressure through a safety valve design, ensuring safe use.