Vehicle hydraulic system

A hydraulic system for a vehicle, comprising:

• a hydraulic pump device which is to be driven by a vehicle drive source of the vehicle to eject a working fluid through first and second outlet ports of said hydraulic pump device;
• a first line passage that guides at least the working fluid ejected through said first outlet port, with a hydraulic pressure in said first line passage being regulated to a first line pressure value;
• a downstream-side passage in which the hydraulic pressure is regulated to a downstream-side pressure value that is lower than the first line pressure value;
• a first path-switching valve device which is configured to allow the working fluid ejected through said second outlet port, to flow into said first line passage, when the hydraulic pressure in said first line passage is lower than a first predetermined pressure value, and which is configured to allow the working fluid ejected through said second outlet port, to flow into said downstream-side passage, when the hydraulic pressure in said first line passage is higher than the first predetermined pressure value;
• and
• a bypass passage which is provided between said second outlet port and said downstream-side passage.