发明名称 |
HYDRAULIC PUMP CONTROLLER |
摘要 |
<p>A controller (24) is provided with function generators (151 and 152). The generator (151) has such a characteristic that a first target tilt amount &thetas;N increases from a minimum value to a maximum value as the detected value PN of a pressure sensor (21) for negative control pressure decreases; the generator (152) has such a characteristic that a second target tilt amount &thetas;B increases from a prescribed minimum value to the same maximum value as the detected value PB of the manipulated variable (pilot pressure) for driving a boom cylinder increases. The controller (24) selects the smaller one out of the two target tilt amounts and drives a proportional solenoid valve (25) based on the smaller value. Therefore, undesired speed increase of such a specific hydraulic actuator as a swinging motor (9), etc., other than boom cylinders which occurs at the time of controlling the tilt amount in accordance with a negative control pressure can be suppressed. <MATH></p> |
申请公布号 |
EP0695875(A1) |
申请公布日期 |
1996.02.07 |
申请号 |
EP19950902273 |
申请日期 |
1994.11.30 |
申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
HIRATA, TOICHI;SUGIYAMA, GENROKU;WATANABE, HIROSHI;YOSHINAGA, SHIGEHIRO |
分类号 |
E02F9/22;(IPC1-7):F15B11/00;F15B11/16 |
主分类号 |
E02F9/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|