Invention Application
- Patent Title: Method and apparatus for controlling a variable displacement hydraulic pump
- Patent Title (中): 用于控制可变排量液压泵的方法和装置
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Application No.: US09858738Application Date: 2001-05-16
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Publication No.: US20020176784A1Publication Date: 2002-11-28
- Inventor: Hongliu Du
- Main IPC: F04B049/00
- IPC: F04B049/00 ; F04B001/00 ; F04B001/26
Abstract:
A method and apparatus for controlling a variable displacement hydraulic pump having a swashplate pivotally attached to the pump. The method and apparatus includes determining a desired swashplate angle as a function of a power limit of the pump, determining an actual swashplate angle, determining a value of discharge pressure of the pump, moving a servo valve spool to a desired position as a function of the desired swashplate angle, the actual swashplate angle and the discharge pressure, and responsively moving the swashplate to the desired swashplate angle position.
Public/Granted literature
- US06623247B2 Method and apparatus for controlling a variable displacement hydraulic pump Public/Granted day:2003-09-23
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