I.C. Engine operable in party-cylinder mode

摘要

An intake air control system of a fuel-injection internal combustion engine which is operable in a part-cylinder mode. With the system, there is provided an additional increase in the effective air flow area through an air induction system leading to the engine cylinders in response to a signal representing the part-cylinder mode operation, so that with the same depression degree of an accelerator pedal a sufficient amount of air will be fed to the selected ones of the engine cylinders after the engine operation has switched from full-cylinder mode to part-cylinder mode.