FAI (free armature injection) technology art includes liquid dosing actuator and theory, fabrication and service system.
The company provides 3 kinds of different  products, which are diesel after treatment SCR system, DPF regeneration system, and gasoline electronic fuel injection system.  All the products stated follow FAI technology art. The core of FAI technology art is the liquid dosing principles and theory. There are more than one hundred patents (pending) are related to FAI technology art.