| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suitably correct a fuel amount when executing secondary air supply and air-fuel ratio feed-back control simultaneously. <P>SOLUTION: As a secondary air supply system, a secondary air pipe 35 is connected to an exhaust pipe 24 on the upstream side of a catalyst 31, and a secondary air pump 36 is provided on an upstream part of the secondary air pipe 35. An ECU 40 executes secondary air supply processing, and executes air-fuel ratio F/B control so that the air-fuel ratio in the exhaust pipe 24 is in a target air-fuel ratio. Before starting air-fuel ratio F/B control during secondary air supply, the fuel amount is increased so that the air-fuel ratio in the exhaust pipe 24 approaches to the target air-fuel ratio. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
