发明名称 |
Torque control apparatus for construction machine three-pump system |
摘要 |
Torque control for a construction machine three-pump system that can accurately control the total absorption torque of first, second, and third hydraulic pumps and effectively use the output torque of an engine. A pump base torque computation section 42 calculates a pump base torque Tr from a target rotation speed. A subtraction section 44 calculates a reference value Tf for the maximum absorption torque available to the first and second hydraulic pumps 2, 3 by subtracting a third pump reference absorption torque T3r from the pump base torque Tr. A correction torque computation section 45 calculates a correction torque value from the delivery pressure of the third hydraulic pump 4. An addition section 46 calculates a target absorption torque Tn by adding the correction torque value Tm to the reference value Tf. A first regulator 31 is controlled so as to obtain the target absorption torque Tn.
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申请公布号 |
US8371117(B2) |
申请公布日期 |
2013.02.12 |
申请号 |
US20070159265 |
申请日期 |
2007.09.07 |
申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD.;NAKAMURA KAZUNORI;ISHIKAWA KOUJI;ARIGA NOBUEI;NARAZAKI AKIHIRO |
发明人 |
NAKAMURA KAZUNORI;ISHIKAWA KOUJI;ARIGA NOBUEI;NARAZAKI AKIHIRO |
分类号 |
F16D31/02 |
主分类号 |
F16D31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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