发明名称 |
Hydraulic Drive Apparatus for Construction Equipment |
摘要 |
A hydraulic drive system for a working machine provides improved safety during forced regeneration. Upon input of a forced regeneration command signal from a forced regeneration switch, a controller detects non-operated states of all hydraulic actuators such as an arm cylinder arranged on a hydraulic excavator based on a lock detection signal from a gate lock detection switch, and also an attitude of a front working mechanism. The attitude is proper from the standpoint of safety. The detection is based on an arm angle signal from an arm angle sensor, a bucket angle signal from a bucket angle sensor and a boom pressure signal from a boom pressure sensor. Taking the detection of the non-operated states and proper attitude as conditions, the controller outputs control signals to a boosting proportional solenoid valve and flow-rate controlling, proportional solenoid valve to make a forced regenerator conduct forced regeneration.
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申请公布号 |
US2012003069(A1) |
申请公布日期 |
2012.01.05 |
申请号 |
US201013256868 |
申请日期 |
2010.03.15 |
申请人 |
HAGIWARA NAOKI;NAKAMURA TSUYOSHI;SATO KENSUKE;OKANO YASUO;ISHIKAWA KOUJI;EZAWA MASANORI |
发明人 |
HAGIWARA NAOKI;NAKAMURA TSUYOSHI;SATO KENSUKE;OKANO YASUO;ISHIKAWA KOUJI;EZAWA MASANORI |
分类号 |
E02F9/22;E02F3/43;F01N3/023 |
主分类号 |
E02F9/22 |
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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