| 摘要 |
<p>The leak of exhaust system (5,6,7) is detected by leak detection means (20), and when leak was detected, the diagnosis relating to air-fuel ratio feedback control or catalyst (6) is stopped or corrected. A place and an amount of the leak are detected and as various control or diagnosis etc. are stopped or corrected according to the detected effect, over heat of the catalyst, incrementation of the harmful exhaust-gas and the false diagnosis of the catalyst (6) can be prevented suitably. <IMAGE></p> |
