| 摘要 |
PROBLEM TO BE SOLVED: To allow to regulate the pressure in a high pressure scope rapidly and at a low cost, by making it possible to load a regulating member in order to give an influence to the fuel pressure by a control signal. SOLUTION: A fuel positioning in a fuel storage container is compressed fed through a first filter 105 and a second filter 115 by a feed pump 110. At the outlet side of the feed pump 110, the fuel is loaded by the pressure 1 to about 3 bar. And when the pressure in the low pressure scope of the fuel system reaches to a pressure allowable to set, a valve 120 is opened, and the inlet of a high pressure pump 125 is loaded at a specific pressure. And the pressure in a rail, that is, the pressure in the whole body of the high pressure scope is controlled depending on the voltage applied by a coil 136, and the pressure in the high pressure scope is regulated. By using the electric feed pump 110 to regulate the compression amount, and a pressure regulating valve 135 in such a way, the pressure in the high pressure scope can be regulated at a low cost, and it can be made suitable to the variable setting value rapidly. |
