STRUCTURE OF ISC VALVE PASSAGE FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE: A structure of an Idle Speed Control(ISC) valve passage for an internal combustion engine is provided to reduce cavity noise when air passes a bypass air passage of the ISC valve. CONSTITUTION: In a structure of an ISC valve passage for an internal combustion engine, a stepmotor valve passage and a Fast Idle Auxiliary(FIA) valve passage introduce the air bypassing a throttle valve(8) into an intake manifold(6). A lip(L) is installed in the outlet(5) of the FIA valve passage, and reduces cavity noise.