发明名称 |
Torque regulating system for fluid operated pump displacement control systems |
摘要 |
A fluid operated pump displacement control system is provided wherein a self pressure is defined as a first control signal, and characterized in that an arbitrary switchable second control signal different from the first control signal is added to the first control signal, and a displacement is adapted to be switched to a displacement corresponding to a value of the second control signal as added to the first control signal. Further, a fluid operated pump displacement control system is provided comprising a control circuit connected to respective displacement control devices of variable displacement pumps and adapted to be operated by discharge pressure fluid from a discrete control pump. A variable torque control valve has a proportional electromagnetic solenoid provided in a circuit connecting the control circuit with the control pump and is adapted to produce a pressure reduction by a discharge fluid pressure of the variable displacement pumps and a propelling force of the proportional electromagnetic solenoid. A detector detects set output conditions of a prime mover for driving the variable displacement pumps, and current is supplied to the proportional electromagnetic solenoid according to the difference between a set reference rotational speed in each of the set output conditions and an actual rotational speed of the prime mover.
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申请公布号 |
US4637781(A) |
申请公布日期 |
1987.01.20 |
申请号 |
US19850717197 |
申请日期 |
1985.03.28 |
申请人 |
KABUSHIKI KAISHA KOMATSU SEISAKUSHO |
发明人 |
AKIYAMA, TERUO;SASAKI, KATSUYUKI;SAIGO, TAKAICHI |
分类号 |
F04B49/00;F04B49/06;F04B49/08;(IPC1-7):F04B49/00 |
主分类号 |
F04B49/00 |
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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