发明名称 |
Electronic control for variable displacement pumps |
摘要 |
An electronic control system for pressure and flow control of variable displacement pumps consists of a closed loop system of operational amplifiers which provide continuous control of the volume modifying element in the pump. In a variable displacement vane pump application a command flow control signal and a feedback signal representative of the position of the adjustable cam ring in the pump are applied to an integrating amplifier to develop a signal for application to an electro-hydraulic valve in the pressure compensating portion of the pump. A command pressure signal is compared with the control signal to limit the latter to a level, thereby providing pressure control for the pump. Slip compensation is effected in the control system by utilizing a portion of the control signal to provide proportional modification of the command signal.
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申请公布号 |
US4285639(A) |
申请公布日期 |
1981.08.25 |
申请号 |
US19790047853 |
申请日期 |
1979.06.12 |
申请人 |
PARKER-HANNIFIN CORPORATION |
发明人 |
WOODRING, RICHARD H.;HOUTMAN, PAUL K.;KOWALSKI, THOMAS A.;WHITMORE, CHARLES H. |
分类号 |
F04B49/06;F04C14/22;(IPC1-7):B64C11/04;B63H5/00 |
主分类号 |
F04B49/06 |
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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