| 摘要 |
PROBLEM TO BE SOLVED: To make a function attainable efficiently processing fuel vapor by reducing a cost further with a constitution simplified, in a wide operating region including idle operation of an engine. SOLUTION: A purge passage 23 going toward an intake passage 13 from a canister 20 is made to branch in fork shape in the halfway, an opening part in one end is connected to the upstream in the vicinity of a throttle valve 14, an opening part in the other end is connected to inside an ISC valve 16. The ISC valve 16 is an opening/closing valve of rotary type driven by electromagnetic action of a solenoid, a valve element in the inside thereof is rotated with a rotary shaft serving as the center, so as to adjust an effective sectional area of a bypass passage 15 of suction air at idle operation time, also when this effective sectional area is a prescribed area corresponding to an idle operation region at operation time of an air conditioner, a flow of vapor from the purge passage 23 to the bypass passage 15 is permitted. |
