| 摘要 |
A pressure regulator is connected to a fuel pipe to which fuel is supplied by a feed pump. There is formed a fuel channel in the pressure regulator for returning fuel from within the fuel pipe to the fuel tank. In the pressure regulator, there is also formed a stopper which can come into contact with a valve body when the valve body is displaced as a result of an increase in fuel pressure within the fuel pipe. The stopper reduces the fuel flow area of the fuel channel when the valve body is displaced as a result of the increase in the fuel pressure within the fuel pipe. Thus, the fuel flow area of the fuel channel is reduced as mentioned above when the fuel pressure within the fuel pipe is high. This makes the fuel within the fuel pipe less likely to be released through the aforementioned fuel channel. For this reason, it is possible to correspondingly increase the fuel pressure within the fuel pipe in an efficient manner when an attempt is made to increase the fuel delivery rate of the feed pump by increasing operating rate of the feed pump under conditions where the fuel pressure within the fuel pipe is high. |
