| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance power generation efficiency by increasing displacements per rotation of variable displacement type first and second main pumps MP1, MP2 in a state of discharging standby flow rate even when the rotation speed of an engine E is low. <P>SOLUTION: A controller C supplies the discharge amounts of the first and second main pumps MP1, MP2 to a power generator G when operation valves 2-6, 14-17 are held at neutral positions and, if the rotation speed of the engine E is low at this time, lets low pilot pressures controlled by pressure reducing valves R1, R2 act on regulators 12, 23 which control the tilt angles of the first and second main pumps MP1, MP2. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
