Interrelated power delivery controls – including engine control – Brake control – Brake control having holding device – with means on engine...
Reexamination Certificate
2007-04-26
2009-06-02
Le, David D. (Department: 3655)
Interrelated power delivery controls, including engine control
Brake control
Brake control having holding device, with means on engine...
C477S040000, C477S050000, C477S182000, C477S905000, C180S307000, C060S446000
Reexamination Certificate
active
07540825
ABSTRACT:
A drive system of a working vehicle including a main engine drivingly connected to a hydraulic pump. The hydraulic pump is connected to first and second hydraulic motors. When an undesirable operating condition is detected, a control device shifts an actuator associated with at least one of the wheels, to reduce the displacement volume of the hydraulic motors driving that wheel. In addition, shifts are made in the actuator of the respective other hydraulic motor and/or in the actuator of the hydraulic pump, in order to maintain a constant speed of travel. The control device shifts the actuator of the hydraulic motor of the other wheel toward greater displacement, and if that shift is insufficient to compensate for the undesirable operating condition, the control device will shift the actuator of the hydraulic pump in the direction of reduced displacement volume.
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patent: 5848664 (1998-12-01), Kaspar
patent: 6202783 (2001-03-01), Taylor et al.
patent: 6648091 (2003-11-01), Tanabe
patent: 7210293 (2007-05-01), Fukasawa et al.
Deere & Company
Le David D.
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