| 摘要 |
A canister shutoff valve has a canister connection port for communicating with a canister, a vapor line connection port connected to a vapor line, and a purge line connection port connected to a purge line. When the canister shutoff valve is de-energized and thus is open, the canister connection port, the vapor line connection port and the purge line connection port communicate with one another, allowing fuel evaporative gas to flow into and out of the canister. When the canister shutoff valve is energized and thus is closed, the canister connection port is blocked and only the vapor line connection port and the purge line connection port communicate with each other, thereby preventing the fuel evaporative gas from flowing into and out of the canister. |
