Load control structure for work vehicle

Details Load control structure for work vehicle Load control structure for work vehicle

2006-09-13

2008-12-30

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

C060S445000, C060S490000

Reexamination Certificate

active

07469534

ABSTRACT:
A load control structure for a work vehicle comprises: a device for detecting operating position of a manually operated speed change operating element; an engine load detection device for detecting load on an engine of the work vehicle; a swash plate position detecting device for detecting an operating position of a swash plate of a variable displacement pump of a hydrostatic continuously variable speed change device; a pump operating device for steplessly operating the swash plate of the variable displacement pump; a motor operating device for operating a swash plate of a variable displacement motor of the hydrostatic continuously variable speed change device between at least two speed change positions including a higher speed position and a lower speed position; a control device for controlling the operations of the pump operating device and the motor operating device. The control device has a automatic pump swash plate control device for controlling the operation of the pump operating device, based on detected information from the load detection device and detected information from the swash plate position detecting device, such that the greater an engine load is, greater is the extent to which the swash plate of the variable displacement pump is operated to a low speed side; and a motor swash plate control device for controlling the motor operating device so as to change the position of the swash plate of the variable displacement motor between the at least two speed change positions.

REFERENCES:
patent: 5177964 (1993-01-01), Tanaka et al.
patent: 5184466 (1993-02-01), Schniederjan et al.
patent: 5784883 (1998-07-01), Ohkura et al.
patent: 6182448 (2001-02-01), Ohkura et al.
patent: 6668549 (2003-12-01), Yano et al.
patent: 6915631 (2005-07-01), Kado et al.
patent: 1008785 (2000-06-01), None
patent: 62-015135 (1987-01-01), None
patent: 06-017928 (1994-01-01), None

Affiliated with

Also associated with

Rating

Load control structure for work vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Load control structure for work vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load control structure for work vehicle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4044909