Control apparatus and control method for internal combustion engine provided with secondary air supply

摘要

An ECU executes a program including a step (S 102 ) of limiting the maximum opening amount of a throttle valve to TH ( 1 ) when failure has occurred in a pressure sensor ("YES" in step S 100 ); a step (S 202 ) of limiting the maximum opening amount to TH ( 2 ) when open failure has occurred in at least one of two vacuum pressure ASVs provided for banks of a V-type engine, and an electromagnetic ASV ("YES" in step S 200 ); a step (S 302 ) of limiting the maximum opening amount to TH ( 3 ) when open failure has occurred in both of the vacuum pressure ASVs ("YES" in step S 300 ); a step (S 402 ) of limiting the maximum opening amount to TH ( 4 ) when open failure has occurred in one of the vacuum pressure ASVs ("YES" in step S 400 ); and a step (S 502 ) of reducing the throttle valve opening amount TH to the limited maximum opening amount.