A robust adaptive chattering-free sliding mode (ACFSM) control method for electronic throttle (ET) system is proposed in this paper. It is well known that nonlinearities in the throttle system including friction. return-spring. limp-home (LH) and gear backlash affect the control accuracy of the throttle valve. https://www.parisnaturalfoodes.shop/product-category/biopqq-20mg/