Pump torque controller of hydraulic working machine

Details Pump torque controller of hydraulic working machine Pump torque controller of hydraulic working machine

2006-11-21

2011-11-15

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of or by input to input pump...

C060S452000

Reexamination Certificate

active

08056331

ABSTRACT:
To permit a precise and easy adjustment of a pump absorption torque of a main pump in accordance with environmental conditions when a sub-pump different in characteristics from the main pump is connected to a prime mover. A main controller12includes a processor means for setting the level of an absorption torque of a cooling fan pump20at a maximum absorption torque in use, a processor means for incrementing an adjustment target absorption torque for a main pump13at a slow rate from a sufficiently small pump absorption torque, and a processor means for repeating loading of a load factor signal and the increment of the adjustment target absorption torque as long as “NO” is determined by a fourth determination means, and a processor means for storing the adjustment target absorption torque as an adjustment value when “YES” has been determined by the fourth determination means.

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International Search Report dated Jan. 9, 2007 with English translation (Four (4) pages).

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