Agricultural tractor

Details Agricultural tractor Agricultural tractor

1999-03-16

2000-09-05

Pezzuto, Robert E.

Earth working

Turn lifts tool off or lowers tool into ground

180233, B62D 1734, B60K 17354

Patent

active

061128260

ABSTRACT:
This invention relates to controls of an agricultural tractor having a rotary cultivating mode and a draft control mode for performing a plowing operation. A conventional tractor has a controller for accelerating front wheels to be faster than rear wheels when the front wheels are steered to a predetermined reference angle. Such control is effected only in the rotary cultivating mode. In the agricultural tractor according to this invention, different reference angles are automatically set for the rotary cultivating mode and draft control mode. In addition, different reference speeds are set for the rotary cultivating mode and draft control mode. When the tractor runs faster than the reference speeds, the front wheels are prevented from becoming faster than the rear wheels even if the front wheels are steered to the reference angles.

REFERENCES:
patent: 4792009 (1988-12-01), Iritani
patent: 4856611 (1989-08-01), Teraoka et al.
patent: 4887686 (1989-12-01), Takei et al.
patent: 5251719 (1993-10-01), Eto et al.
patent: 5279384 (1994-01-01), Shibahata et al.
patent: 5293956 (1994-03-01), Onishi
patent: 5341893 (1994-08-01), Fukui et al.
patent: 5752211 (1998-05-01), Takasaki et al.

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