Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1986-12-19
1988-07-26
Cohan, Alan
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60445, 60486, 91361, 91459, F15B 2100
Patent
active
047591838
ABSTRACT:
A pump supplies via in each case a directional valve with associated pressure balance fluid or pressure medium to a plurality of loads. When the pump power is not sufficient a proportional quantity reduction is achieved at all loads in that the control voltages of the control members for electrical actuation of the directional valves are supplied to a summation stage and the sum voltage is compared in a comparison stage with a limit value corresponding to the maximum pump displacement, whereupon when the limit value is exceeded a control signal is generated with which the stroke of the driven directional valves is reduced.
REFERENCES:
patent: 3968730 (1976-07-01), Lionet
patent: 4554991 (1985-11-01), Eden
patent: 4625622 (1986-12-01), Gunda
patent: 4672811 (1987-06-01), Yoshida
Hufnagel Eugen
Kreth Norbert
Torkler Heinz
Cohan Alan
Mannesmann Rexroth GmbH
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