Draft control system with dual mode draft sensitivity

Details Draft control system with dual mode draft sensitivity Draft control system with dual mode draft sensitivity

1991-06-03

1992-09-01

Taylor, Dennis L.

Earth working

Automatic power control

Draft responsive

172 7, 36442407, A01B 63112

Patent

active

051431599

ABSTRACT:
A tractor-mounted three-point hitch for pulling a tillage implement is controlled by a closed loop including draft sensors for sensing the draft on the hitch and providing a draft feedback signal. An operator-controlled quadrant lever provides command signals for commanding the positioning of the hitch relative to the ground. During rapid hitch movement commanded by movement of the quadrant lever while the implement is above the ground, the draft feedback signal, which is normally filtered to eliminate frequencies above about 3.2 Hz, is more heavily filtered to eliminate frequencies above 0.5 Hz. This makes the loop less sensitive to the draft feedback signal and reduces vibrations which would otherwise occur because of oscillations in the draft feedback signal. The oscillations are caused by interaction of the weight of the implement bouncing because of the pneumatic tires on the tractor, and movement of the hitch to correct for the apparent change in draft. As the hitch approaches the commanded position the system reverts to the normal filtering so that the system is more sensitive to the draft feedback signal.

REFERENCES:
patent: 4132272 (1979-01-01), Hollaway et al.
patent: 4132273 (1979-01-01), Mortensen
patent: 4300638 (1981-11-01), Katayama et al.
patent: 4343365 (1982-10-01), Rajagopal et al.
patent: 4385353 (1983-05-01), Schneider
patent: 4437048 (1984-03-01), Arnold
patent: 4495577 (1985-01-01), Strunk et al.
patent: 4508176 (1985-04-01), Wiegart et al.
patent: 4518044 (1985-05-01), Wiegardt et al.
patent: 4571500 (1986-02-01), Mucheyer
patent: 4679633 (1987-07-01), Kauss
patent: 4796712 (1989-01-01), Rutkowski et al.
patent: 4807136 (1989-02-01), Rutkowski
patent: 4837691 (1989-06-01), Boe et al.
patent: 4846283 (1989-07-01), Batcheller
patent: 4878543 (1989-11-01), Kauss
patent: 4886123 (1989-12-01), Arnold et al.
patent: 4924943 (1990-05-01), Maichle
patent: 4931967 (1990-06-01), Boe et al.
patent: 4969527 (1990-11-01), Boe et al.
patent: 5012415 (1991-04-01), Boe et al.
SAE Technical Paper 891835 entitled Tractor Three-Point Hitch Control System.
SAE Technical Paper 901561 entitled Development of the Electronic Draft Control System for the Ford New Holland 8210 Tractor.

Affiliated with

Also associated with

Rating

Draft control system with dual mode draft sensitivity does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Draft control system with dual mode draft sensitivity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Draft control system with dual mode draft sensitivity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-762475