| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of precisely controlling an air-fuel ratio for each cylinder independently of an opening/closing state of a WGV (waste gate valve) in a multi-cylinder internal combustion engine with a supercharger having the WGV. <P>SOLUTION: It is determined whether or not a WGV 40 is opened (steps 100 to 102). As a result, when the WGV 40 is closed, a transport lag time used in controlling an air-fuel ratio is set to a value corresponding to an exhaust path length passing through a turbine 301 (step 104). When the WGV 40 is opened, the transport lag time used in controlling the air-fuel ratio is set to a value corresponding to an exhaust path length passing through an exhaust bypass passage 38 (step 106). The cylinder corresponding to an output signal of an air-fuel ratio sensor 52 is identified on the basis of the set transport lag time, and air-fuel ratio control for feeding back the output signal of the air-fuel ratio sensor 52 to calculation of a fuel injection amount of the identified cylinder is executed (step 108). <P>COPYRIGHT: (C)2012,JPO&INPIT |
