发明名称 |
CONTROL DEVICE AND PITCH ANGLE CONTROL METHOD |
摘要 |
A control device for automatically controlling a pitch angle of a blade includes a hydraulic oil amount calculation unit and an open ratio setting unit. The hydraulic oil amount calculation unit is configured to calculate an amount of hydraulic oil passing through a blade tilt cylinder valve. The open ratio setting unit is configured to cause the blade tilt cylinder valve to open at a predetermined open ratio when a request for the pitch angle to be changed has been received, to cause the blade tilt cylinder valve to close when the calculated amount of hydraulic oil has reached a predetermined amount of hydraulic oil required for the change of the tilt angle, and to cause the open ratio to be smaller than the predetermined open ratio while a request for a predetermined action necessitating that hydraulic oil be supplied from a main valve is being received.
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申请公布号 |
US2013000930(A1) |
申请公布日期 |
2013.01.03 |
申请号 |
US201213634494 |
申请日期 |
2012.01.06 |
申请人 |
KOMATSU LTD.;SHINTANI SATORU;NAKAGAWA TOMOHIRO;NAGASAKA RYOUICHI |
发明人 |
SHINTANI SATORU;NAKAGAWA TOMOHIRO;NAGASAKA RYOUICHI |
分类号 |
E02F3/85;E02F3/76 |
主分类号 |
E02F3/85 |
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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