Hydraulic control system for a tractor

Details Hydraulic control system for a tractor Hydraulic control system for a tractor

1993-10-18

1995-09-26

Reese, Randolph A.

Earth working

Automatic power control

Draft responsive

7386257, 73862627, 73862634, 73862639, A01B 63112

Patent

active

054527660

ABSTRACT:
A control system for controlling a hydraulically operable link mechanism mounted on a working vehicle. The link mechanism includes lift arms, a hydraulic actuator for controlling the lift arms, a first and a second lower links each connected at one end thereof to a working implement, and connecting rods interconnecting the lift arms and the first and second lower links, respectively. The control system includes a first coupling for pivotally connecting the first lower link to one side of a vehicle body, a second coupling for pivotally connecting the second lower link to the other side of the vehicle body, strain gauges provided for the first and second couplings, respectively, and a control device for controlling the actuator based on detection signals received from the strain gauges.

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patent: 4280363 (1981-07-01), Johansson
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patent: 5149121 (1992-09-01), Hafner
patent: 5178220 (1993-01-01), Cevolini et al.
Power Farming, vol. 66, No. 2, Feb. 1987, Sutton, GB p. 33, "MB-trac pre-set draught control option".
Motorisation & Technique Agricole, No. 93, Sep. 1986, Paris, Fr, pp. 77-83 "Nouvelles applications electroniques sur Fendt".

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