Hydraulic drive device for work machine

Details Hydraulic drive device for work machine Hydraulic drive device for work machine

2005-04-28

2009-12-15

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

C060S434000

Reexamination Certificate

active

07631495

ABSTRACT:
To provide a hydraulic drive device for a work machine that is capable of ensuring reduction in fuel consumption even in actual work where an operating condition changes every moment. Operating condition identifying unit (41) for identifying the operating condition and hydraulic pump control system (40b) for controlling absorption torque of hydraulic pump (18) are provided. When the operating condition identified by operating condition identifying unit (41) is a specific operating condition, hydraulic pump control system (40b) controls the absorption torque of hydraulic pump (18) to achieve hydraulic pump absorption torque characteristic line (PLb) matching the absorption torque of hydraulic pump (18) with output torque of engine (17) at engine output torque point Mb at which a fuel consumption rate is substantially minimum.

REFERENCES:
patent: 4773369 (1988-09-01), Kobayashi et al.
patent: 4904161 (1990-02-01), Kamide et al.
patent: 5077973 (1992-01-01), Suzuki et al.
patent: 5111789 (1992-05-01), Moriya et al.
patent: 5481875 (1996-01-01), Takamura et al.
patent: 5527156 (1996-06-01), Song
patent: 5638677 (1997-06-01), Hosono et al.
patent: 5878721 (1999-03-01), Nakamura
patent: 5930996 (1999-08-01), Nakamura et al.
patent: 6020651 (2000-02-01), Nakamura et al.
patent: 6161522 (2000-12-01), Fuchita et al.
patent: 6170262 (2001-01-01), Yoshimura et al.
patent: 6183210 (2001-02-01), Nakamura
patent: 6336067 (2002-01-01), Watanabe et al.
patent: 6339737 (2002-01-01), Yoshimura et al.
patent: 7068675 (2006-06-01), Shitaya
patent: 7289895 (2007-10-01), Ishimoto et al.
patent: 2006/0167607 (2006-07-01), Nakamura et al.
patent: 2006/0235595 (2006-10-01), Sawada
patent: 2007/0204604 (2007-09-01), Naruse
patent: 0 404 953 (1991-01-01), None
patent: 1 655 469 (2006-05-01), None
patent: 2 421 808 (2006-07-01), None
patent: 02-038630 (1990-02-01), None
patent: 4-194383 (1992-07-01), None
patent: 05-086635 (1993-04-01), None
patent: 08-218442 (1996-08-01), None
patent: 10-205368 (1998-08-01), None
patent: 11-002144 (1999-01-01), None
patent: 11-107321 (1999-04-01), None
patent: 11-293710 (1999-10-01), None
patent: 2986471 (1999-10-01), None
patent: 3064574 (2000-05-01), None
patent: 2002-295408 (2002-10-01), None
patent: WO 98/06936 (1998-02-01), None

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