Control system for controlling input power to variable displacem

Details Control system for controlling input power to variable displacem Control system for controlling input power to variable displacem

1987-01-12

1989-03-07

Look, Edward K.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

60444, 60449, 417216, F04B 4906, F16H 3946

Patent

active

048095044

ABSTRACT:
A control system for controlling input power to hydraulic pumps of a hydraulic system including a prime mover and a plurality of variable displacement hydraulic pumps driven by said prime mover. The control system comprises: a first computing unit for computing, for each of the hydraulic pumps, an input torque control value concerning a distribution of input torques of said hydraulic pumps from a representative pressure obtained on the basis of a discharge pressure of at least one other hydraulic pumps; a second computing unit for determining an input torque for each of the hydraulic pumps on the basis of a corresponding one of the input torque control values determined by the first computing unit; and a third computing unit for determining an object discharge rate of each of the hydraulic pumps from the input torque obtained by the second computing unit and an own discharge pressure of each of the hydraulic pumps.

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patent: 4606313 (1986-08-01), Izumi et al.
patent: 4655689 (1987-04-01), Westveer et al.
patent: 4689956 (1987-09-01), Hein

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