| 摘要 |
A leak diagnosis is performed on an evaporated fuel processing piping system 5 by inserting a canister vent solenoid valve 6 into an insertion port 303 of a canister 2 and inserting an air pump 7 into an insertion port 305 of the canister 2. When it is configured that the canister vent solenoid valve 6 and the air pump 7 can be inserted separately into the canister 2 in this manner, a system for diagnosing a leak in the evaporated fuel processing piping system 5 can be installed in a more saved space than a case where a module integrating the canister vent solenoid valve 6 and the air pump 7 is inserted thereinto. Moreover, a configuration corresponding to an employed leak diagnosis method can be realized without changing the canister 2. |
