| Original document(27 pages) Authorized document(27 pages) 中文版 |
A controller (24) is provided with function generators (151 and 152). The generator (151) has such a characteristic that a first target tilt amount theta 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 theta 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 (6) increases. The controller selects the smaller one out of the two target tilt amounts from the two generator and drives a proportional solenoid valve (25) based on the smaller value. Therefore, undesired speed increasing of such a specific actuator as a swinging motor (9), etc., other than boom cylinders can be suppressed. |
Application Number
申请号 |
94191012 |
Application Date
申请日 |
1994.11.30 |
| Title 名称 |
Hydraulic pump controller
|
Publication Number
公开号 |
1116872 |
Publication Date
公开日 |
1996.02.14 |
| Approval Pub. Date |
1997.09.24 |
Granted Pub. Date |
1997.09.24 |
| International Classification 分类号 |
E02F9/22;F15B11/00;F15B11/16 |
Applicant(s) Name
申请人 |
Hitachi Construction Machinery Co., Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Toichi Hirata;Genroku Sugiyama;Hiroshi Watanabe |
| Attorney & Agent 代理人 |
ZHANG ZUCHANG |
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