The invention relates to a method and its
system which is utilized the automobile vibration energy to piezoelectric generate
electricity. The piezoelectric device is set in the automobile suspension
system, utilized the vibration energy to generate
electric energy, and used as an electric supply to store and utilize. The
system includes that no less than one piezoelectric device set in the automobile suspension system and used to transform the vibration energy to
electric energy; an
electric power exchange system, used to adjust and transform the
electric energy produced by the piezoelectric device, and used the electric energy to the
energy storage device or final power utilization load; no less than one
energy storage device or final power utilization load. The piezoelectric device is connected to the
electric power exchange device, and it is respectively connected to the
energy storage device or final power utilization load. The invention supplies
new energy source for the vehicle, especially for the electric automobile or mixing dynamic automobile. The gained electric energy can be directly used for the dynamic electric source, so that effectively increase the continuous driving mileage of the vehicle. Proper control strategy is adopted. And the invention also possesses the function of semi-active vibration reduction.