| 摘要 |
PURPOSE: To provide a pressure/output flow closed loop controller (output flow/ pressure closed loop controller) enabling the use of standard closed loop controllers which can be manufactured at low cost using mass production techniques. CONSTITUTION: In a closed loop control circuit for a variable hydraulic pump 30 having an output flow variable by control means and including at least two closed loop controllers for actuating the control means, at least one hydraulic switching element 145 is provided. This switching element automatically connects the closed loop controller providing the highest or the lowest pressure to the control means 31. |
