Fuel evaporation gas discharge suppressing device of internal combustion engine

摘要

A fuel evaporation gas discharge suppressing device of an internal combustion engine includes a gas storage tank for storing a fuel evaporation gas in a communication passage for causing an air intake passage and a fuel tank in an internal combustion engine of a vehicle to communicate with each other in the communication passage. Control unit controls canister opening/closing unit, fuel tank opening/closing unit and gas tank opening/closing unit based on an internal pressure of the fuel tank. The control unit opens the canister opening/closing unit and opens the fuel tank toward the communication passage, and then opens the gas storage tank toward the communication passage when reducing the internal pressure of the fuel tank.

主权项

1. A fuel evaporation gas discharge suppressing device of an internal combustion engine, comprising:
a communication passage communicating an air intake passage with a fuel tank in the internal combustion engine of a vehicle; a canister for adsorbing a fuel evaporation gas in the communication passage; a gas storage tank for storing the fuel evaporation gas in the communication passage; a canister opening/closing unit for opening the canister to the communication passage or closing the canister; a fuel tank opening/closing unit for opening the fuel tank to the communication passage or closing the fuel tank; a gas tank opening/closing unit for opening the gas storage tank to the communication passage or closing the gas storage tank; and a control unit for controlling the canister opening/closing unit, the fuel tank opening/closing unit and the gas tank opening/closing unit, based on an internal pressure of the fuel tank, wherein the control unit opens the gas storage tank to the communication passage after the control unit opens the canister opening/closing unit and the fuel tank to the communication passage, to reduce the internal pressure of the fuel tank.