Drive system of a self-propelled working machine

Details Drive system of a self-propelled working machine Drive system of a self-propelled working machine

2007-04-10

2007-04-10

Petravick, Meredith C. (Department: 3671)

Harvesters

Motorized harvester

With selective control of drive means

C056S011800

Reexamination Certificate

active

10741098

ABSTRACT:
A self-propelled forage harvester includes front and rear sets of driven ground wheels. The front set of wheels is driven through a transmission including an input shaft driven by a variable displacement motor and coupled to the front set of wheels by a gear train including one planetary gear set, (in one embodiment), and two planetary gear sets, (in a second embodiment). In both cases, the transmission is shiftable so as to establish at least first and second gear ratios. The shifting of the transmission is accomplished automatically by a control arrangement which takes into account the operating mode of the harvester so that a ratio for producing the correct velocity range for harvesting is established when the harvester is in a working operating mode, and a higher velocity range is established when the harvester is in a transport operating mode. Other operating parameters are sensed and used to automatically control hydraulic pump and/or motor displacement, and for controlling engine speed.

REFERENCES:
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patent: 6217477 (2001-04-01), Nobumoto et al.
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patent: 6363805 (2002-04-01), Marchart
patent: 6543593 (2003-04-01), Saito
patent: 0819562 (1998-01-01), None
patent: 1052388 (2000-11-01), None

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