A fuel supply control system for controlling a fuel amount to be supplied to an internal combustion engine having an exhaust gas recirculation mechanism comprising an exhaust gas recirculation passage connected between an intake pipe and an exhaust pipe, and an exhaust gas recirculation valve provided in the exhaust gas recirculation passage, is disclosed. One film of the three films includes first and second edge portions placed opposite to each other. The enclosure frame is adapted to be fastened to the mounting bracket and configured to cover the mounting bracket. In other embodiments, the funnel 14 is connected to the grill 12 using straps 36 or magnetic straps 40. As it is an independent structure, it can prevent damage to washing device during cleaning of bathroom and toilet.