Hydraulic circuit control device

Details Hydraulic circuit control device Hydraulic circuit control device

2006-03-29

2009-08-25

Le, David D. (Department: 3655)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

C475S005000, C475S116000, C475S136000, C475S159000, C477S129000, C477S160000, C477S164000

Reexamination Certificate

active

07578761

ABSTRACT:
A hydraulic circuit control device that selectively supplies oil to a first oil passage and a second oil passage by an oil pump, the control device includes: an oil passage switching unit adapted to connect the oil pump to either the first oil passage or the second oil passage; a control mode switching unit adapted to switch the control mode of the electric motor to either a torque control mode or a speed control mode; an oil passage selecting unit adapted to select whether to connect the oil pump to the first oil passage or the second oil passage; and a control unit adapted to perform control so that the control mode switching unit switches the control mode to the torque control mode when the first oil passage has been selected, and perform control so that the control mode switching unit switches the control mode to the speed control mode when the second oil passage has been selected.

REFERENCES:
patent: 5839084 (1998-11-01), Takasaki et al.
patent: 6565473 (2003-05-01), Endo et al.
patent: 2003-054279 (2003-02-01), None

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