Patent ID: 9441579
Filing Date: 2016-09-13
CPC Classification: B60K,F02D,F02M,F16K,Y10T

Claim Text:
1. A fuel tank system comprising: a fuel tank mounted on a vehicle; a canister that absorbs a fuel evaporative emission released from the fuel tank; piping that connects the canister and the fuel tank; a blocking valve that is provided in the piping to block the fuel tank; a filling starting part that instructs a start of filling to the fuel tank; a first pressure detector arranged in the fuel tank to detect pressure in the fuel tank; a second pressure detector that detects the pressure in the fuel tank with an accuracy different from an accuracy of the first pressure detector; a pressure reduction control part that reduces the pressure in the fuel tank to a predetermined pressure by opening the blocking valve when a start of filling is instructed by the filling starting part; a filling permission part that permits filling when the pressure in the fuel tank becomes the predetermined pressure or less with the pressure reduction control part; and an indication part that indicates a progress degree of reduction of the pressure in the fuel tank on the basis of a detection result obtained by the second pressure detector in a former stage of a progress degree of the reduction of the pressure during a period from the instruction of the start of filling to the permission of filling, and indicates a progress degree of reduction of the pressure in the fuel tank on the basis of a detection result obtained by the first pressure detector in a latter stage of a progress degree of the reduction of the pressure during the period from the instruction of the start of filling to the permission of filling.