| 摘要 |
PURPOSE:To achieve practical delivery pressure, in capacity controller suitable for high pressure fuel pump in Diesel engine, by constructing such that the delivery pressure approximately proportional to the rotating speed of external engine can be produced and said delivery pressure can be maintained under specific rotating speed. CONSTITUTION:Upon driving of variable capacity pump 101 and feed pump 102 through an external engine, the delivery oil from the pump 102 will go through a regulate valve 103 to the pump 101 while through control line 108 to a balance piston 104. The delivery oil from the pump 101 is fed through a pressure line 107' in downstream of differential pressure regulator 109 to a load unit. Upon increase of the rotating speed of external engine, for example, the control pressure Pc in control line 108 will increase to move a spool 106 through a piston 104. Consequently, relatively high delivery pressure P1 is led to incremental piston 118 to increment the eccentricity of eccentric ring 113 of pump 101 thus to increase the delivery capacity of pump 101. |
