| 摘要 |
PROBLEM TO BE SOLVED: To insure a sufficient time to purge fuel adsorbed at a canister. SOLUTION: A fuel tank 22 is provided to be partitioned into a fuel chamber 28 and an air chamber 30 by a bladder film 26, and after the vaporized fuel generated in a fuel tank 22 is adsorbed by a canister 62, it is purged toward an intake passage 34. By closing an evaporator system with a negative pressure introduced, an evaporator system hole is detected. Furthermore, by directly purging gas in the air chamber 30 in the intake passage 34 by bypass of is through the canister 62, a bladder film hole is detected. When a negative pressure is introduced through detection of the evaporator hole, detection of the bladder hole is executed. In this case, by overlapping the timing at which fuel is not purged from the canister 62 through detection of the evaporator system hole with a timing, at which fuel is not purged from the canister 62 through detection of the bladder film hole, a timing in which fuel adsorbed to the canister 62 is purged, is prevented from being shortened sharply.
|
