A fuel tank system including a fuel tank internally storing fuel, a canister in which vaporized fuel generated in the fuel tank is adsorbed and desorbed by an adsorbent, and open to the atmosphere by an atmosphere communication pipe, a purging pipe placing an engine in communication with the canister, a vent pipe placing the fuel tank in communication with the canister, a negative pressure pump provided at the atmosphere communication pipe, causing negative pressure to act on the fuel tank from the canister, and a negative pressure open/close valve provided at the vent pipe, maintaining an open state at a pressure difference between a negative pump pressure acting from the negative pressure pump and a tank internal pressure acting from the fuel tank, and closing at a pressure difference between a negative purging pressure acting from the engine and the tank internal pressure.
Fuel tank system
2019-01-01
Patent
Electronic Resource
English
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |