| 摘要 |
<p>An engine intake system comprising a controller (12) which, on the basis of the air flow rate (6a) measured by an air flow meter (6), calculates the suction air amount in idling operation and, when the value obtained by subtracting the suction air amount in idling operation from the memorized suction air amount in normal operation exceeds a threshold value, determines that a blow-by gas return pipe (9) is being dislodged.</p> |
