Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Reexamination Certificate
2008-01-08
2008-01-08
Lazo, Thomas E. (Department: 3745)
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
C060S431000
Reexamination Certificate
active
07316113
ABSTRACT:
A control device for a work machine hydraulic pump used on a work vehicle according to the present invention has an object to rapidly accelerate the engine to start the vehicle quickly and to rapidly produce a large tractive force when an operator starts depressing the accelerator pedal while operating the work machine operating lever from the neutral position. The control device controls the capacity of the work machine hydraulic pump so as not to exceed the capacity upper limit corresponding to the currently detected engine speed, when the engine speed detected by the engine speed detecting device is equal to or lower than a predetermined speed (maximum torque speed).
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Komatsu Ltd.
Lazo Thomas E.
Wenderoth , Lind & Ponack, L.L.P.
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