To prevent the pressure rising at the outlet of a pump when a hydraulic control system is stopped.
The hydraulic control system has a pump to send pressured fluid from a fluid reservoir and a hydraulic actuator selectively driven by the fluid. The system is provided with a main flow control valve connected between the pump and the actuator to selectively supply fluid to or from the actuator, a control unit connected to the main flow control valve to control the operation of the main flow control valve to control the fluctuation velocity of the area of the main flow control valve in connection with the quantity of the fluid discharged from the pump, and another control unit connected to the pump to increase and decrease the number of actual pump commands in proportion to the inverse of pump commands.
KRONE JOHN J
KOEHLER DOUGLAS W
COBO MICHAEL A
| JP2000266004A | 2000-09-26 | |||
| JP2000337304A | 2000-12-05 | |||
| JPH11154025A | 1999-06-08 | |||
| JPH10311301A | 1998-11-24 | |||
| JPH0735105A | 1995-02-03 |